Hot water well submersible pump supporting high temperature cable selection

The specifications of the power cable with the hot water well submersible pump motor are determined by the heating and voltage drop of the cable. In addition to the need to control a certain current density to limit the cable temperature, the longer the length of the cable, the greater the voltage drop of the cable, the motor starting performance, performance and reliability of the greater impact. Therefore, the same with the two sets of diving motor, when equipped with hot water submersible pump head different, with different cable length, the requirements of the cable cross-section is not the same. In accordance with GB / T2816 "well submersible pump" standard, the water temperature is 25%, the current rating, the cable voltage drop should be ≤ 5% of the rated voltage. Which can be obtained when the power supply voltage is 380V, different power wells with hot water submersible pump motor with a certain size of the cable when the maximum allowable length. When the power supply voltage is higher and more stable or relatively large capacity of the power supply transformer, the voltage is high, more stable, the submersible pump motor with the same length of the cable to allow the appropriate length of the appropriate length Or with the cable cross-section appropriate to reduce the cable to reduce the cost of configuration) at this time with the submersible motor with the maximum allowable length of the cable, when the well with hot water submersible pump head is very high, the motor down well, with Cable length is longer, and the transformer power supply quality is poor, the motor starting is very difficult: starting current is very large, long cable voltage drop is very large, so that the motor terminal voltage is much lower, the starting current is further increased, the cable pressure drop , The starting torque is lower, resulting in a vicious bang, not only the motor starting difficult, forced start may cause electric = machine winding damage. At this time, in addition to the provisions of the cable should be configured, it is best to increase the transformer supply voltage.

The working principle and characteristics of fountain pump

The working principle and characteristics of fountain pump
1, the working principle of the fountain pump
     Before the start of the fountain submersible pump, the pump and inlet pipe filled with water, pump operation, the high-speed rotation of the impeller generated by the centrifugal force, the impeller flow of water was thrown around, into the volute, impeller inlet to form a vacuum , The pool of water at the outside world pressure along the suction pipe was sucked to add this space. And then inhaled water and by the impeller by the volute and into the outlet pipe. It can be seen, if the centrifugal pump impeller constantly rotating, you can continue to absorb water, water, water can continue from low to high or distant. In summary, the fountain pump is due to the high-speed rotation of the impeller generated by the centrifugal force, the water phase of the high.
    2, the general characteristics of the fountain pump
    (1) The flow direction of the water along the fountain is in the axial direction of the impeller, perpendicular to the axial flow, that is, the direction of the incoming and outgoing water is 90 °.
    (2) because the fountain pump impeller inlet to form a vacuum suction, so before the start of the pump and the suction pipe must be filled with water, or vacuum pump to evacuate the air to form a vacuum, and pump shell and suction pipe must be strictly sealed, Do not leak, otherwise the shape is not a vacuum, it can not absorb the water to.

Knowledge of fountain pump belts

Old models of fountain pumps generally use ordinary V-belt, and the new model of the fountain pump may use a serpentine belt. If the old model of the fountain pump installed in the new models, there may be some problems. Because the serpentine belt may drive the fountain submersible pump impeller in the opposite direction with the V-belt, thus causing the fountain pump to rotate in the reverse direction, resulting in overheating of the coolant.

Now more and more engines use the timing wheel of the camshaft to drive the fountain pump. The advantage of this is that the fountain pump does not rotate, and the car can not be driven and the engine length can be shortened. It must be emphasized that after a suitable period of time, the timing belt should be replaced. Sometimes see such a situation. The fountain pump is damaged in a very short time after installing a new timing belt, which is generally due to increased belt tension. Therefore, when installing a new pump, do not rush to switch to a new belt.

Prevention Measures of Centrifugal Pump Vibration and Its Solution

Centrifugal pump vibration control, centrifugal pump vibration solution
① centrifugal pump vibration control from the design control
A. To improve the rigidity of the centrifugal pump, rigidity to control the vibration and improve the pump running invariance is very important. Which is the main point is to properly increase the pump shaft diameter and improve the pump seat rigidity. Increasing the rigidity of the pump requires that the pump be connected to the smallest rotor deflection during a permanent operation, and increasing the rigidity of the pump shaft helps to reduce the rotor deflection and improve the operational invariance. During the operation of the axis of the swing, destruction of sealing, wear ring and many other failures are not related to the rigidity of the shaft. Pump in addition to the strength of the calculation, the stiffness of the calculation can not be missing.
B. Considering the hydraulic design of the impeller The impeller of the pump should be subjected to cavitation and dewatering as little as possible during operation. In order to reduce the pulsating pressure, it is desirable to design the blade in a sloping form.
C. Strict requirements of the impeller static balance data centrifugal pump impeller static balance error value is generally the impeller diameter multiplied by 0.025g / mm, for high-speed impeller (2970r / min above), the static balance error should be reduced by half.
D. Designed with better bearing layout The design of the bearing housing should be better in the form of a bracket. At present, the cantilevered bearing frame is operated, and it seems that the layout is compact and small in size, but the rigidity is insufficient, the vibration resistance is poor and the failure rate is high during operation. The use of bracket-type pump seat can not only improve the rigidity of the support, and can save the pump shell by the manipulation of corrosion-resistant precious metal materials, that is, the pump casing can be thinned wall thickness, to balance their beauty.
E. Robust and reliable board design Some mobile-operated pumps are not very demanding on the root plate because the pump's inlet and outlet pipes are rubber hose and the ISG pipeline pump is in a free condition during operation. And in the process of fixed operation of the pump is often associated with the complex and strong steel pipe in the same way, the pipeline assembly stress, thermal expansion and contraction of the stress and deformation of the ultimate impact on the pump in the fundamental, The design should have sufficient strength and size requirements, for the direct form of the idea of ​​low-speed pump, mechanical weight should be more than 3 times, high-speed pump was more than 5 times.
② centrifugal pump vibration control from the manufacturing quality control
A. Coaxiality should meet the requirements of a lot of vibration or failure of the pump is due to coaxial imbalance caused by coaxial degree of pumping all the rotating parts, such as IS centrifugal pump shaft, bearing, Impeller, pump shell and bearing accuracy, which are required by the design drawings marked with the accuracy of processing to ensure inspection.
B. Smooth manufacturing of impeller and pump shaft pump shaft Overview of the finish to be high, especially the seal and oil seal parts. Pump shaft heat treatment quality should meet the requirements, high speed pump should be more demanding. Impeller of the flow surface should be as smooth as possible, the material distribution should be average, the line should be accurate.
③ centrifugal pump vibration control from the installation of the first way to prevent and control pump vibration
A. The basic plate to find the right horn should choose the output point, the best set in the fundamental and symmetrical placement, the number of horns can not be more than three. Horn placed discomfort At that time, preloading bolts may cause deformation of the root plate.
B. Pump shaft and the motor shaft to ensure coaxial degree of coaxial coaxial axis, should be from the upper and lower and the object of the target off the calibration. Between the two shafts should be left between the required clearance to ensure that the two axes in the course of the operation to do limited axial movement.
C. Pipes should be equipped with a reasonable pump should be to avoid the sudden flow of the pipe and the backlog of air, the entrance is best equipped with a cone-shaped tapered pipe, so that the fluid inhalation gradually shorten the growth rate, so that the fluid into the average impeller.
D. Should be designed to avoid the impact of pipe stress on the pump pipe configuration equipment should be avoided as much as possible when the assembly stress, deformation stress and pipe valve gravity to the pump body, the greater the temperature difference between the pipe system should be set to metal spring Hose to eliminate the influence of pipe thermal stress. E. Check the root bolt is smooth and reliable After the new pump is installed, it is necessary to preload the anchor bolts and then test machine. If this is a matter of neglect, often resulting in the underlying plate under the oblique horn vibration and abdication, and then tightly destroy the level of the fundamental board, which will cause long-term adverse effects on the operation of the pump.
(3) Centrifugal pump vibration solution from the operation and maintenance to solve the pump vibration
① as far as possible the use of low-speed pump Although the high-speed pump can reduce the size of the pump and improve efficiency, but some high-speed pump because of the design and manufacturing problems difficult to comply with the requirements of high-speed operation, poor operation, Therefore, from the operational considerations, in order to reduce the loss of downtime and delay the operating life, or use low-speed pump is more favorable.
② to prevent the operation of small flow or open air pump operation is not allowed to manipulate the import valve to adjust the amount of energy, the operating conditions of the general import valve should be fully open, control the flow can only adjust the export valve, if the operation of the valve long lasting off Pump capacity is too large, running is not economical and affect the life, be careful to change the pump or reduce the speed of running low-speed centrifugal pump.
③ The pump is sealed in a sealed condition. In addition to the leakage caused by running the drip, the most serious problem is that the fluid enters the bearing interior, exacerbates wear, causes vibration and shortens the life. When the packing letter (packing) is applied, in addition to the usual operational requirements, the most easily overlooked problem is to fill the stuffing box. The roundabout groove on the sleeve is often caused by the incorporation of a dirty packing with a sticky soil and sand. If it is to use mechanical seals, the need to pay attention to the problem is moving, static ring material selection summary appropriate, the material can not be offset by the erosion of the working medium, mechanical seal is one of the main factors of multiple failures.
④ strict inspection of the pump running and real-time processing
Check oil temperature and temperature rise of lubricating oil.
B. Check the temperature and leakage of the stuffing part.
C. Check the vibration and abnormal noise. ,
D. To pay attention to the discharge port, suction teeth pressure changes and flow changes, discharge pressure changes violently or decline, often because the suction side of the foreign body is blocked or inhaled the air, to stop the pump in real time.
E. Check the operation of the idea and often pay attention to watch the ammeter pointer fluctuations, the daily inspection of the contents of the contents of the best recorded in the file, found abnormal circumstances should be real-time shutdown, not a delay.

Installation Requirements and Operation Method of Deep Well Submersible Pump

Deep well pump installation requirements, deep well pump operation method
(1) installation requirements for deep well pumps
① This provision applies to the installation of long shaft deep well pumps and submersible pumps.
② Deep well pump cleaning and inspection should meet the following requirements: parts and parts of all the mating surface (thread, stop, end, etc.) should be clean and clean; factory assembled parts should not be dismounted j working parts (rotating part) The rotation should be flexible.
③ before the pump in place should be the following checks: well pipe diameter and well pipe straightness should be consistent with the provisions of the equipment technical documents, pump sets of wells in the well part of the wells should be free up and down, submersible pumps shall not damage the diving cable; (Figure 2-1); between the well pipe and the foundation should be placed on the soft isolation layer; the middle of the middle of the middle of the size of the gap should be consistent with the requirements of the connection between the pump and pump seat ; Pipe should be no sludge and sludge; salt pipe should be straight, threaded and flange surface should be no bruises, and should be clean and clean.
Long shaft deep well pump should be checked according to the following requirements: the working parts should be flexible rotation, the impeller shaft axial flow should be consistent with the provisions of the equipment technical documents; pump drive shaft end should be flat, end and thread should be no damage, and Should be clean and clean, the drive shaft at both ends of the case of support, the central radial runout should not be greater than 0.2ram; bearing bearings and rubber bearings should be intact, rubber bearings should not be contaminated with grease.
(2) the operation of deep well pump
① The operator must master the general part of the operating procedures.
② open pump operation: deep well submersible pump should be opened before the start of the release valve, and then shut, start the outlet valve should not be closed, can be slightly open some, to be opened immediately after the start, control to the appropriate location, submersible pump running smoothly Open the pressure gauge valve; submersible pump operation, observe the ammeter and voltmeter instructions whether there is a significant change in the operation of whether the noise, the normal working current should not be greater than the motor nameplate on the specified rating; pump should be within the specified flow range Use, the pump flow must not be too large, too large or too small should be appropriate to adjust the opening of the outlet valve; one of the following circumstances should immediately stop running, the pump working state has not changed, the voltage rating and current exceeds the rated value , The pump intermittent water, the water pipe has a significant vibration, issued a loud noise, frequent switching switch protection.
③ stop the pump: stop the pump operation, close the outlet valve and pressure gauge valve; pump stop, in order to reduce the water back, should cut off the circuit, turn off the valve; if restart, after 5min or more get on.

Method of Adjusting Performance of Axial Flow Pump

Axial flow pump performance adjustment methods are variable angle adjustment and variable speed adjustment of two, after we installed, if you do not meet the production requirements, you can use the following two ways to adjust the pump performance.
1, variable angle adjustment; from the structure point of view, axial flow pump impeller has a huge hub, easy to install adjustable angle of the blade. When the blade installation angle changes, the blade of the water lift also changed, thus changing the performance of the pump, which is the axial flow pump variable angle adjustment. As the blade mounting angle increases or becomes smaller, the flow rate of the axial flow pump, the head, the power changes, but the highest point of efficiency does not change, it is very advantageous to the axial pump performance adjustment.
2, variable speed adjustment; axial flow pump is working at a certain speed, and at a certain speed to obtain the appropriate flow, head, power and efficiency. When the speed changes, its performance parameters are also corresponding changes, so as to achieve the purpose of regulation. If the axial flow pump is powered by a diesel engine or a gasoline engine, it can change the size of the accelerator to change the speed. If the axial flow pump is connected with the power machine is a delta belt or flat belt indirect transmission device, you can change the transmission pulley diameter to change, Wheel or driven wheel can be, the purpose of foot to change the transmission ratio. Variable speed pump performance is more economical, wide range of applications, all agricultural pumps can be used.

how to deal with mine submersible pump pump pipe fittings leakage

Daily use of mine submersible pumps in the process, we sometimes in the water pipe joints, connecting bolts, observed the phenomenon of leakage. The main reason: water pipe failure, defective, did not do the pressure test; installation of the pipeline process, the gasket is not put, the connector is not handled well, the coupling bolt is not even tightened. In response to these problems, we have to repair or even replace the defective pipes, tear off or re-arrange those centers that deviate from the larger butt joints. After aligning the hole, insert the coupling bolts into the tightening. After installing the complete piping, the pressure and the leakage test of the system are carried out.
In addition, due to mine submersible pump leakage will lead to insulation damage, bearing flooding, so that the unit to stop running, we should strengthen this precaution. The main reasons for the leakage of the pump include mechanical seal or cable inlet special seal, 0 type ring is damaged, power cable or signal cable is damaged; under normal circumstances, the protection device will promptly issued flooding, leakage, humidity and other alarm signals, Stop.
    In order to avoid the phenomenon of pump leakage, before the installation, check the motor surface with or without water leakage phenomenon, and check the quality of the sealing parts; installation must ensure that the sealing parts of the end contact is good; check the motor before and check the insulation and grounding insulation resistance and Alarm system sensor components are intact. Found in the operation of water leakage, the need to remove the relevant seals and damaged cable, put on a new.

Mine submersible pump shaft and bearing inspection and assembly

Under normal circumstances, the mine submersible pump journal can not have scars, journal cylindrical cylinder tolerance value of 0.0lmm; gear pump after a period of time, the maximum wear of the journal shall not be greater than 0.01D.
Mine submersible pump bearings generally use both rolling bearings and plain bearings, and sliding bearings for the form of copper sets. The use of rolling bearing gear pump bearing inner ring and the shaft with the H7 / js6; needle roller bearings without inner ring, the shaft and the needle with the H7 / h6; needle roller bearing outer ring and the cover with the K7 / H6, the use of sliding bearing mining pump bearing bore and cylindrical coaxial degree tolerance of 0. 01 mm; sliding bearing outer and end cover with R7 / h6;
Gear pump bearing wear should be replaced after the super-standard, rolling bearing assembly method and centrifugal pump rolling bearing assembly method is the same. With copper sleeve for the bearing gear pump, in the replacement of copper sets, the first should check the copper sleeve and the cover with the situation. In compliance with the requirements, the copper sleeve coated with oil, with a press to press it into the pump cover body, and finally in the bearing and end cap interface drilling thread with screws to fix it, to prevent copper sets Rotation or axial movement.
   Copper sleeve assembly must be checked after the journal and copper sleeve with the gap, if the gap is too small, should be based on the journal, scraping copper sets, until meet the requirements so far. On the contrary, if the gap is too large to re-replace the copper sleeve.

Stainless steel fountain pump vibration how to deal with?

Stainless steel fountain pump is the use of motor-driven centrifugal force to gradually introduce some of the liquid surface of the equipment, in the manufacture of fountains for people at the same time, but also for the surrounding environment to add a beautiful landscape. Stainless steel fountain pump selection is also a skill, improper selection and operation error is likely to cause vibration occurred Oh. So, what are the potential causes of fountain pump vibration is how to deal with it? Here we stainless steel fountain pump experts give some advice on the corresponding solution:
Two pumps in parallel should ensure that the pump performance is the same. Pump performance curve should be slow down type as well, can not have hump.
Regularly need to fill the oil bearing the appropriate amount of oil, for the long axis of liquid centrifugal pump, because the shaft there is a torsional vibration, if the use of a thrust tile, the damage is mainly thrust tile, then you can properly increase the viscosity of lubricating oil , To prevent the destruction of liquid dynamic pressure lubricating film.
Note: Eliminate the factors that lead to overloading the stainless steel fountain pump, such as the runner blockage; extend the pump's start time properly, reduce the disturbance to the drive shaft, reduce the collision and friction between the rotating parts and the stationary parts, The heat caused by the deformation; for water lubricated sliding bearings, start the process should be added pre-run water, to avoid dry start until the water pump and then stop the water.
Stainless steel fountain pump It is recommended to use the measurement and analysis vibration conditions to determine the optimum operating parameters of the pump in order to prevent the amplitude of the stainless steel fountain pump from being too large.

Fountain pump attention points during disassembly

Fountain pumps can be seen everywhere in our real life, a device that can go fountains and see the fountain pump in every part of the world. It's an important fountain pump to get a popular welcome The reason people use the fountain pump fountain to get happiness, the same use of fountain pump to relax their body and mind. Here to explain the fountain pump in the demolition of attention to points.
Check the fountain Submersible pump bearings: check the motor part of the upper and lower bearings, if found wear or clearance is too large, to be timely replacement of new bearings, is strictly prohibited "sick" improvised use.
Check the following:
If the motor is running, the submersible pump produces a "click" sound, and the cycle is proportional to the speed, and the hand when the rotor is laborious, bearing raceway is a bit astringent or avulsion phenomenon; if the bearing issued intermittent " Choked choked "sound, the rotor when the rotor is uncertain when the dead point, the general is a submersible pump ball frame damage, broken inner ring or broken ball. Encountered the above situation, you must replace the bearings, so as to avoid greater damage.
Submersible pump should be marked before the front and rear cover and the base of the seat. In order to repair the assembly by the original assembly, it will not cause the assembly error caused by the shaft is different from the heart; in the demolition submersible pump impeller and sleeve and other components, it should be noted that do not hard hard punch, the principle of thermal expansion, Edge tapping or "Rama" and other tools to remove.

How to improve the running life of hot water submersible pumps

How to improve the running life of hot water submersible pumps
(1), hot water submersible pump population piping should be sealed well, hot water submersible pumps generally have good self-absorption performance, in the course of work, the population pressure to negative pressure, bad seal leading to air into, Resulting in increased noise vibration of the pump, damage to the pump rotor parts, hot water submersible pump life.
    (2), hot water submersible pump at the beginning of the start, no pressure in the export formation, do not blindly speed to prevent shaft or bearing premature damage.
    (3), hot water submersible pump outlet pressure measurement points to set up interlock to stop the alarm, otherwise, once the discharge pipe blocked, easy to cause the pump body is bad.
    (4), for high viscosity hot water submersible pumps, easy to crystal pump, in the system should be set up Tt parking cleaning system, so that after the pump will be easy to clear the pump outside the pump, to prevent the crystallization in the pump, start up.
    (5), cleaning pipetting, do not use hot water submersible pump pump delivery cleaning fluid, should remove the inner parts, after the end of the installation of fluid, so as not to pump inside the stick foreign body.
    (6), for high temperature submersible pumps, because the pump at high temperature operation, the temperature will be shifted after the transfer, so the installation of the cold pipe should be set on the hinge seat, which can effectively prevent the temperature after the pipe displacement.
    (7), for high temperature submersible pumps, couplings must be hot after the pump heat correction, in order to avoid additional torque caused by operation.
    (8), the pump heat medium jacket temperature should be slightly lower than the front and rear jacket tube heat medium temperature. Because the melt viscosity and shear rate into a decreasing function, the gear squeeze, bearing the shear will melt temperature through the pump after the rise of 3 ℃ -5 ℃, reduce the heat medium temperature to prevent melt degradation.
    (9), speed to slow, do not make the sharp rise in pressure before and after, so as not to damage the bearing or make the melt plugging lubrication ring Road.
    (10), hot water submersible pump outlet filter to be replaced regularly, so as not to plug the outlet. The pump long-term operation under high pressure.
    (11), should be replaced regularly. When the hot water submersible pump due to the bearing gap becomes larger and larger when the voice should be replaced. Of course, the bearings can be re-used to re-use the bearing after alloying.

Hot water submersible pump installation method?

Hot water submersible pump installation method?
(1) According to the hot water submersible pump spindle position can be divided into:
      ① vertical installation: (vertical) pump installed in the vertical direction of the spindle, the installation of the bracket. The vertical installation of the pump is limited by the working environment of the pump (eg piping pumps, submerged pumps, deep well pumps, drum pumps, hot water submersible pumps), installation space constraints (vertical marine pumps) and design factors (eg vertical high speed Pump).
      ② Horizontal installation: The horizontal (horizontal) submersible pump installed in the horizontal direction of the spindle, the installation of the bracket, which is the installation of most pumps.
(2) by hot water submersible pump can be divided into:
      ① wet installation: the pump part or all installed in the liquid installation. This installation is compact, small footprint, installed directly in the sewage pool, no need to build a dedicated pump room to install pumps and motors, you can save a lot of land and infrastructure costs, easy installation and maintenance; but the pump seal Performance, insulation performance requirements.
      ② dry installation: the pump completely placed outside the installation of the liquid, which is the installation of most of the pump, with intuitive maintenance, size is appropriate, the lower requirements of the motor pump, the characteristics of strong adaptability.
(3) According to whether the submersible pump can be divided into:
      ① mobile installation: the pump or its components installed on a removable carrier (such as car) installation method. This installation method used in small, intermittent use, the use of more occasions.
      ② fixed installation: the pump fixed to the foundation or bracket on the installation, is the most commonly used installation.

The Law of Valve Movement of Fountain Pump

In the experiment, it was found that the movement law of the valve of the fountain pump was not exactly the same as that of the people, and its movement was accompanied by two kinds of rotary motion in addition to the linear motion in the vertical direction. When the plunger movement speed is small, the valve ball around the vertical axis of the horizontal rotation and along the hole in the seat hole that is the valve seat hole axis revolution. The angular velocity of the plunger is related to the velocity of the plunger. The greater the speed of the plunger, the greater the angular velocity of the ball. The special form of the ball is mainly related to the particularity of the valve ball, the seat structure and the impact of the fluid. Deep well pump is a spherical valve, when the fluid around it flows, in the back of the surface layer will be off the phenomenon, while generating a lateral excitation force. Due to the symmetry of the ball, this lateral force will move along the circumference of the "equator" around the ball, so that the ball is not always on the axis of the valve seat, but away from a distance and close to the seat Corner on the rotation, which is the "revolution" phenomenon.
In addition, due to the instability of the fluid flow and the deviation of the ball caused by the fluid relative to the valve ball flow asymmetry, the ball will produce a certain degree of deflection, so that the lateral force is not acting on the core, but in the horizontal There is a certain eccentric, so that the ball in the horizontal plane there is a rotation, that is, "rotation" phenomenon. The above conclusion is obtained in the case of pure liquid. In the gas-liquid mixed-phase flow, due to the existence of bubbles, the flow field disturbance is more intense, and the bubble on the ball has a certain impact, this time the ball movement is more complex, in addition to rotating movement, there are drifting up and down.

Fountain pump use precautions

Fountain pump is actually a well submersible pump, is designed for agricultural irrigation and drainage, sprinkler irrigation, industrial and civil construction of the drainage system developed for ponds, fish ponds, water towers, deep wells and high water delivery.
When using the fountain submersible pump, there are a few points that require special attention:
1, equipment grounding:
In order to ensure the safety of the fountain when used, the state of the mandatory requirements of the submersible pump is to take protective grounding, or once the pump shell leakage, water pump near the water and the reservoir surface will be charged, seriously endanger the safety of humans and animals , Will also cause the waste of electricity.
If the fountain pump metal shell and meet the national standard grounding (grounding resistance is not greater than 4Ω) ground connection, leakage, the current through the pump shell, ground, grounding, ground, transformer working ground wire and power to form a closed Circuit, once the leakage current is too large, is to make the pump protection device work - fuse blow or air switch trip, automatically disconnect the fountain pump power.
2, install the leakage protector:
Once the leakage crisis occurs, as long as the leakage value exceeds the operating current value of the leakage protector, usually not more than 30mA, the leakage protector will work, disconnect the switch, so that the fountain to stop running.
3, the power supply voltage is abnormal when the boot:
As a submersible pump, the voltage is too high, too low will make the pump temperature rise, shorten the life of the pump, or even burn, and now in many places there is a long-term low-voltage power supply line or line terminal voltage is too high, the terminal voltage is too low The problem. Therefore, when the fountain is running, the operator should always pay attention to the power supply voltage value, when the power supply voltage is higher than the rated voltage of 10% or less than the rated voltage of 10%, and the current exceeds the rated current of 20%, should immediately stop, to avoid abnormal voltage Boot.
4, the motor in the opposite direction of rotation:
Although some fountain submersible pumps can reverse the double water, but because of the reverse flow of small current, so reverse the time is too long will damage the motor.
5, to avoid long-term overload work

Mine submersible pump which is good

Mine submersible pump is mainly used for coal mine central pumping station drainage, coal mine flood disaster after the rescue or drainage drainage, commonly used is a centrifugal pump. Mine submersible pumps are commonly used D-type, DA-type and TSW-type multi-stage centrifugal pump; and the bottom of the water and mining area drainage is commonly used B, BA and BZ single-stage centrifugal pump.
    Mine submersible pump main working parts are impellers, which have a certain number of leaves, impeller fixed on the shaft, driven by the shaft rotation. The pump housing is a spiral diffusion chamber, the suction port of the pump is connected with the water absorption, and the drain is connected with the drain pipe.
    Before the pump starts, the water is injected into the pump by the water injection funnel, and then the pump is started. The impeller rotates with the shaft. The water in the impeller is also rotated by the blade. Under the action of centrifugal force, the water flows from the impeller inlet to the outlet. In this process, the kinetic energy and force of water are improved. After the water discharged by the impeller by the spiral diffusion chamber, most of the kinetic energy into pressure energy, and then transported out along the drain. At this time the impeller inlet is due to the discharge of water and the formation of a vacuum. Water in the suction wells under the action of atmospheric pressure, the suction pipe into the impeller. Impeller constantly rotating, drainage will be carried out without interruption.

The axial flow pump controls the inhalation and discharge of the gas

Axial flow pump is a kind of vacuum pump which can keep the gas in and out, so as to achieve the purpose of pumping. There are basically two types of pumps: variable capacity vacuum pump and momentum pump. Variable capacity vacuum pump is divided into reciprocating vacuum pump and rotary vacuum pump, ⑴ reciprocating vacuum pump: the pump is to use the piston to do reciprocating motion, the gas inhalation, compression and discharge. Therefore, also known as piston-type vacuum pump. 250ZLB Axial flow pump Rotary vacuum pump: is the use of pump cavity piston to do the rotary motion, the gas inhalation, compression and discharge. The momentum transfer pump relies on high-speed rotating blades or high-speed jets that transmit momentum to the gas or gas molecules so that the gas is continuously transported from the pump inlet to the outlet. Specific can be divided into the following types. Molecular vacuum pump: it is the use of high-speed rotating rotor to the energy transmission to the gas molecules, so that compression, exhaust a vacuum pump.
    Axial flow pump energy growth, can be satisfied with the urgent need for emergency drainage. The axial flow of the pump is small and the flow is large, and it is used in the power plant for the use of the recirculation pump. But the axial flow pump placement and training things than the horizontal centrifugal pump complex. Slurry pump is small and light, easy to take care, you can pump mud, mortar, deserved in the deserted environment of sewage pumping. The pump is subject to a skill economic objective that weighs the effectiveness of the pump. It refers to the pump's useful power (ie, pump input power) and pump shaft power (ie, pump output power) ratio.

Application of intelligent control and protection of hot water submersible pump

With the rapid development of variable frequency drive technology, computer technology and information technology, the traditional hot water submersible pump manufacturing industry has been toward energy saving, intelligent direction.
  QJR hot water submersible pump intelligent control and protection is a certain emblem processing capacity, in the well with hot water submersible pump application, control and protection can partially replace the function of artificial potassium, the equipment has been planted from the pump factory Intelligent control and protection of the intelligent control technology (software) hardware and integration, the hardware generally include the inverter (cabinet), PLC and pump protection unit. Intelligent control and protection for the safe and reliable operation of the pump and energy conservation has a very significant role.
  Wells with hot water submersible pump operating point is the pump performance curve and the system curve (also known as the pipeline or container to be sexual curve) intersection. The operating efficiency of the pump at the operating point fluctuates violently due to the different operating points. , The operating efficiency of a hot water submersible pump can vary by 40% depending on the operating point.The difference is the potential of the pump system to save energy and improve its reliability.
  The performance curve of the traditional hot water submersible pump is the trajectory of the pump, such as the most commonly used flow-lift curve, NPSHr, and so on. First-class curve and so on.
  In the variable frequency (frequency), the hot water submersible pump performance curve with the pump speed changes in accordance with similar laws of movement, the trajectory of the formation of multiple performance fan. Each sector can be composed of a performance curve when connecting the maximum speed and a performance curve set at minimum speed, such as flow-lift fan, NPSHr flow, and so on.
  Performance of hot water submersible pump fan performance curve than the pump has a greater intersection with the system curve and more control selectivity. The variability of this interaction leads to large fluctuations in the efficiency and reliability of the pump, which is necessary for intelligent control and protection of the pump. If the pump control and protection to adapt to this change, the pump operation efficiency is high and smooth and maintenance is low. On the contrary, if the pump control and protection can not adapt to this diversity, the wells with hot water submersible pump operating efficiency is low, uneven and maintenance and high.

Hot water submersible pump instrument selection and control protection requirements

Hot water submersible pumps are widely used in various types of geothermal wells, hot springs and high temperature hot water lifting devices. The purpose of the control system is to monitor the operation status of the hot water submersible pump group, Whether the ancillary system is working properly, early detection of hot water submersible pump components failure, make predictive maintenance plans to reduce unplanned downtime, to avoid catastrophic accidents. Monitoring instrumentation, control and protection system settings generally meet:
(1), different types of geothermal wells, hot spring wells and high temperature hot water lifting device process operation requirements and protection of technological equipment (or other equipment within the device) requirements;
(2), the requirements of safe and efficient operation of hot water submersible pumps and the requirements of operation status monitoring;
(3), ancillary systems, such as lubricating oil stations, control and protection requirements
(4), drive system control protection requirements.
  Hot water submersible pump monitoring can be divided into online real-time monitoring [hot water submersible pump intelligent control] and off-line periodic monitoring of two categories, for small, general use, or less important in the device pump can be considered cyclical Monitoring (eg using a portable monitor). For the high investment of large pumps, you can consider setting up a more complete online monitoring system.
1), on-line monitoring instrumentation, control and protection system settings to consider the use of hot water submersible pumps, geothermal wells, hot springs and high temperature hot water lifting device in the importance of (pump caused by the loss of production), pump Failure probability, failure mode, the second hazard caused by the accident, the cost and time of the maintenance, the operating conditions, the operation mode, the operation experience and so on.
  As a general principle, the following two factors can be considered:
    ① the principle of reliability. Reliability of the first principle is: simple is reliable; so in the configuration monitoring, control and protection system, to avoid the configuration too much, not too much of the necessary instruments, if too much is not necessary to set the instrument and control, Not only can not increase the reliability of the pump group but also become the source of the accident.
    ② economic principles. The configuration of the monitoring, control and protection system takes into account the economy, such as an investment and subsequent maintenance costs. At the same time, the monitoring, control and protection of the pump should also take into account the environmental protection needs, such as the impact of leakage of the hot water submersible pump seal on the environment.
2), according to QJR hot water submersible pump type, structural characteristics, component failure mode, to determine the physical parameters to be monitored. Commonly used monitoring parameters are power monitoring, temperature monitoring (such as bearing temperature, oil temperature, shell temperature, motor stator winding temperature), corrosion monitoring, leak monitoring (such as QJR well with hot water submersible pump inlet and outlet valve leakage, mechanical seal Leakage monitoring), pressure monitoring (inlet and outlet pressure), speed monitoring, phase monitoring, well hot water submersible pump flow monitoring, bearing vibration monitoring, shaft vibration monitoring, shaft displacement monitoring, axial thrust monitoring, torque monitoring, no sealing heat Water submersible pump bearing wear monitoring, lubricating oil analysis.
3) Select the monitoring method, monitor the instrument and the installation location according to the physical parameters of the monitoring. By monitoring, recording and analyzing the physical parameters of certain parts of the hot water submersible pump, the operation status of the hot water pump is judged, controlled and protected, and the QJR hot water submersible pump maintenance plan is made according to the change trend of the recorded monitoring data

Optimum Design of Anti - abrasion Metal Material for Axial Flow Pump

Optimum Design of Anti - abrasion Metal Material for Axial Flow Pump
Axial flow pump working in muddy water are severely damaged and severely damaged, requiring frequent downtime and even forced flooding during flooding, resulting in significant economic and energy losses. Therefore, to solve the problem of rapid wear and tear damage of axial pump is an important task of hydropower development. Abrasion is the result of combined action of cavitation and sediment erosion wear [1]. According to the site observation, abrasion damage is much more serious than individual cavitation or separate sediment wear. Because of the current mechanism of metal erosion damage has not been fully understood [2], coupled with the study of anti-abrasion of metal materials and the lack of comprehensive and systematic reports, anti-abrasive materials research is still more use of test and empirical methods for time-consuming trial exploration. In order to make anti-abrasive material development, design and application of detours, we must grasp the law and system of anti-abrasive material design. This paper discusses the research results in anti - abrasive materials, and reveals the inherent laws and systems of anti - abrasion material design. 1 Test materials and methods In the basic research of anti-abrasive material design, 10 kinds of industrial pure metals such as aluminum, magnesium, zinc, copper, iron, nickel, molybdenum, chromium, cobalt and tungsten were used as test materials. 30mm × 6mm test piece, in the electromagnetic resonance high-speed bubble generator with industrial water as a medium to accept cavitation test to thin film per unit time as a basis for measurement of cavitation loss.

Hot Rolling Process of Mixed Flow Pump Impeller

Hot Rolling Process of Mixed Flow Pump Impeller
At present, there are three kinds of processing methods of mixed flow pump impellers at home and abroad: (1) sand casting and grinding processing; (2) sand casting CNC machining; (3) molding hot bending (1/2 CNC machining). The first method is simple, but the labor intensity of workers, foreign has been rarely used, and domestic also as the main method of processing leaves. The second method of processing out of the leaves of high precision, but the cycle is long, there is not enough domestic five-axis milling bed to meet the requirements of the production schedule. The third method to obtain the blade surface and internal performance are good, but also to meet the general product production requirements. However, the pressure technology has been limited to the curvature of the change is not limited, the thickness of the more uniform leaves, for the sculpture body surface of the Francis turbine runner blade pressure technology remains to be further studied. Three Gorges unit mixed flow pump single output 7lOMW, wheel diameter IOm, a single leaf weight 18t. Our company to small Danjiang power station turbine rotor blades as the middle of the leaves, made a series of hot pressing process attempts, including hot pressing hot pressing mold design and manufacturing is a crucial link

Study on Temperature Rise Mechanism of Axial Flow Pump

Study on Temperature Rise Mechanism of Axial Flow Pump
To reduce complications, mechanical cardiac assist devices are becoming smaller. As the clinical application in recent years proved that continuous non-Bo blood flow can be adapted to the body, the use of high-speed rotation of the impeller to drive the blood can also reduce the volume of the pump, so the electric axial flow of the heart of the auxiliary pump has become a hot topic in this field. The author of the Chinese Academy of Medical Sciences Fu Wai Cardiovascular Hospital on the heart of a long-term systematic study. Recently developed axial pump has reached short-term clinical application requirements. In order to achieve long-term application goals, we put forward the idea of ​​"miniature axial flow pump in the apical chamber wall" based on the previous research experience, and carried out the prototype development. In the development process found that with the miniaturization of the axial flow pump, the speed gradually increased, some characteristics of the pump motor deterioration, efficiency. This trend increases the temperature of the pump in the working state. Excessive pump surface temperature can cause similar damage to the organization, resulting in exudative inflammatory response, reduce the physiological compatibility. We developed the "apical chamber wall micro-axial pump", intended to be implanted into the apex muscle wall, due to the miniaturization of the pump is very high, poor heat dissipation conditions, temperature control has become an important part of the study. Such studies have not been reported in domestic and foreign literature. In this paper, the factors influencing the temperature rise of the blood pump were discussed through the comparative analysis of the micro-axial pump in the apical chamber wall, which laid the foundation for the proposed control scheme.

Cavitation characteristics of mixed flow pump

Characteristics of cavitation and cavitation performance of mixed - flow pump
As a hydrodynamic propulsion unit, a mixed flow pump is required to meet specific flow, lift and cavitation performance requirements at the moment of start-up, and the size and quality are severely limited [1] and [2]. In general, stable working conditions, the pump cavitation characteristics have been more research [3 ~ 8]. In this paper, according to the special requirements of high-speed mixed-flow pump, the characteristics of cavitation erosion during start-up are analyzed according to the special properties of the parameters such as speed and flow rate. And the main measures to improve the cavitation performance of high-speed mixed-flow pump are proposed. In the process of start-up, the performance parameters such as speed, flow and head of the mixed-flow pump and the inlet conditions change rapidly with time, and the generation and development of cavitation is also very complex. In the process of starting the cavitation phenomenon, the use of 1200r / min speed of the model pump for cavitation and no cavitation conditions under the start-up test

Characteristics of Fountain Submersible Pump

Fountain submersible pump its shell, flow parts and external parts are made of cast iron or stainless steel (304,316,316 L) made, and the product also retains the original fountain pump performance.
1, the use of cast iron or stainless steel, pump to improve the corrosion resistance.
2, impeller with special materials to prevent the impeller when the impeller loose.
3, leakage protection measures: the use of fixed potential grounding device.
4, on the basis of the original ordinary pump, according to the requirements of the fountain dedicated pump, the company after several tests, in the technical development, continuous improvement of processing materials, fountain dedicated pump can be frequent start, completely suitable for the use of music fountain.
5, the pump with stainless steel filter cover, three-phase four-wire cable.
6, stainless steel fountain pump for automatic water injection function.
7, the motor is self-circulating water-cooled.

Fountain submersible pump service life

Fountain submersible pump industry standard warranty period of one year, but even the same manufacturer of the same type of water pump, because the use of the environment, operating standards, the different materials, the life gap is huge. In addition to the selection of fault, transportation, misuse and extremely harsh operating conditions and other special reasons outside the normal circumstances, in addition to wearing parts, fountain submersible pumps to use two or three years is not a big problem. Many may also be used for five to eight years.

From the transport of materials to analyze: If you contain a lot of hard dirt, fountain submersible pump over-current material will speed up wear and tear, but in the transmission of similar lubricating substances, will play a role in extending life, so the industry did not Fountain submersible pump life to a standard material under the test method and basis, but directly through the quality of the package to explain.

From the standard operation and adhere to the regular maintenance aspects, this is even more obvious. In order to better ensure that the fountain submersible pump is stable and efficient long-term use, for all customers given the following meaning:

1, should find out the direction of rotation of the motor, there are many types of fountain submersible pump is forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time will damage the motor windings.

2, as a result of low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is less than 198 volts, the line voltage is lower than 342 volts, the fountain submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start winding power and heat or even burn Bad windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the fountain submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.

3, install the fountain submersible pump, the cable to overhead, the power cord not too long. Fountain submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Fountain submersible pump work do not sink into the mud, otherwise it will lead to poor heat dissipation and electrical motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.

4, leakage protection device, also known as security device, its role from the "security device" the three words can be understood. Because the fountain submersible pump in the water, easy to leakage caused by power loss and even lead to electric shock accident. If equipped with leakage protection device, as long as the leakage of fountain submersible pump leakage current value exceeds the leakage protection device (generally not more than 30 mA), leakage protection device will cut off the fountain submersible pump power to ensure safety, while avoiding leakage, waste Electricity.

5, do not frequently switch fountain submersible pump, this is because the pump stall will produce a return flow, if immediately start, will make the motor load start, resulting in starting current is too large and burn out the winding. As the start current is very large, frequent start will burn the fountain submersible pump motor windings.

6, in order to avoid the fountain submersible pump long-term overload, do not smoke a large amount of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should stop inspection. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.

7, usually should always check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired, to avoid water infiltration fountain submersible pump. The use of fountain submersible pump protection and pay attention to some of the daily protection can better extend the fountain submersible pump life.

QSP fountain pump installation

Fountain submersible pump installation

The fountain submersible pump is one of the main components in the fountain system, providing power to the fountain. Fountain pump installation is also relatively simple, mainly based on the installation of space to choose the installation, installation of the fountain is divided into horizontal installation and vertical installation of two, the following brief look at two ways and means of the way.

1, horizontal installation

Horizontal installation is to let the pump level lie down, making the pump shaft and pipeline in the same plane, and in the same horizontal plane. Horizontal installation fountain pool depth can not be deep, just to be able to submerged the pump can be, but the fountain pump to occupy a sufficient area of ​​the plane. Fountain submersible pump cooling need to rely on external water cooling, so the fountain pump from the bottom of the pool shall not be less than 100mm, the pump with the bracket fixed.

2, vertical installation

Pump shaft and trunk center line to be vertical, so you can reduce the size of the fountain pool, theoretically need to deepen the fountain to pump the height, but the actual construction of the fountain area is more localized. In order to repair the fountain pump, easy to replace. Sufficient spacing should be maintained between the pump outlet flange and the piping.
Fountain pump installation must choose the right way, this will reduce the cost of civil construction and management expenses, and pump operation and maintenance will be very convenient, the appropriate installation so that the overall appearance of the fountain system looks beautiful.

QSP fountain pump is mainly used for fountain landscape, rockery landscape, aquaculture and other places. Widely used in low-lift cities, farmland irrigation, sprinkler irrigation; industrial and civilian supply and drainage systems, hills, mountain water, and low-lying land to exclude water.

Hot water submersible pump motor performance _ Features

Hot water submersible pump motor mainly submersible submersible motor; set built-in lightning protection, * thermal protector, * using electronic starter.
① no centrifugal switch, no capacitance, to avoid mechanical loss, increase the number of starts, reduce the volume.
② stator outside the mountain stainless steel welding, there are stainless steel lining, sealed by the epoxy resin filling. Sealing performance, corrosion resistance, heat fast, anti-deep water pressure, long life, reduce costs.
③ closed squirrel cage rotor, slot using high-quality copper, before and after the copper end ring welded, not easily deformed or broken, good electrical conductivity, high efficiency. Steel is not rotted by chemical treatment.
④ use of thrust bearings, can carry a greater axial load, said by the awkward said the stone to attack the general category of maintenance.
⑤ motor from the water lubrication, internal and external water cooling, the use of water to avoid pollution. The normal working dive depth of up to 900 meters, to solve the domestic deep water operations and scientific research problems.
* Refers to single-phase two-wire motor installed.
  For proper installation, please read the instruction manual carefully before use. The power supply and fittings must be installed in accordance with local and international codes, and all metal fittings and hot water submersible pumps should be grounded. All ground lines shall not be less than the specifications of the motor cables. External power cord to be greater than the motor, seven source leads, then the product must be absolutely sealed. Be sure to use within the rated voltage range, if the voltage is ultra-high ultra-low, hot water submersible pump motor will not work. In order to reduce the risk of electric shock, can not be used or water to connect the power cord, do not use the swimming area in the submersible pump.

Basic description of hot water submersible pumps

Hot water submersible pump unit (including the pump and the submersible motor composed of two parts), a pair of outlet flanges, 12 × 60 bolts 6. Or configure the corresponding outlet (to facilitate the user to install the hose installation), the use of maintenance instructions 1, 1 certificate of a packing list, wooden box packaging.
Appearance color
Common colors (when customer is not required): Phthalocyanine blue (chlorinated rubber paint) suitable for general non-corrosive water in the work of the unit spraying.
Anticorrosive coating
If used in corrosive high temperature occasions: first: can change the casting materials such as stainless steel, tin bronze, etc. Second: If the corrosion is not particularly serious can brush anti-corrosion coating epoxy finish, brush anti-corrosion coating Increase the service life of the unit.
Description:
1. Open the lower bucket.
2. Open the water hole and vent hole, with water pipes or water bottles to the water hole to add water, to the vent hole overflow water to fill.
3. Tighten the water injection hole, vent hole screw, and then install the suction bucket.
Instructions for use can refer to the QJ series submersible pump instructions.
Selection can refer to the QJ series submersible pump instructions.

Daily maintenance and inspection of hot water submersible pumps

Hot water submersible pump daily maintenance
1. Check whether the pump is running when the leakage, if the leakage should be submersible pumping maintenance department maintenance
2. Always check whether the pump impeller has dirt, foreign matter, etc. to block the water impeller or outlet
3. Check the submersible pump power wire is broken, aging, power cord copper core leakage, this situation if the power cord on the shore, you can wrap, if it is best in the water is to replace the power supply.
4. Check the pump running sound is good, if there is noise, indicating that the pump bearing damage, need to repair, refueling, replacement.
Second, Tianjin submersible pump can not be normal water supply reasons
1. Is the seal safe?
2. whether the need for water diversion work
3. Whether there is a foreign body in the gap of the outlet or impeller
4. If the reversal is reversed, replace the capacitor connection method.
Third, Tianjin submersible pump abnormal noise should be how to deal with.
1. Check the coil for damage
2. Check the bearing for damage
3. Whether the impeller is loose, grinding into the water pump low-end cover.

Application Environment and Parameter Introduction of Hot Water Submersible Pump

(A) product use and main features
QJR series of hot water submersible pump for geothermal wells, for the extraction of geothermal water. Geothermal is a cheap, clean energy, widely used in heating, medical, bathing, breeding, planting, industrial and agricultural production, entertainment services and so on.
QJR series of submersible submersible submersible submersible work, with heat, corrosion, high efficiency, energy saving, easy installation and maintenance, etc., is the replacement of geothermal water equipment.
(B) the use of conditions
1, the rated power supply voltage 380V ± 5% frequency 50Hz ± 1% of the three-phase AC power supply, the motor terminal rated voltage should be guaranteed within the allowable deviation of the rated voltage range.
2, the control cabinet must have a short circuit, lack of phase, overcurrent, overload and other basic protection, and to ensure that the installation will adjust the settings to the stability of the operation, the protection of sensitive locations, the steps are very important to be professional and technical personnel debugging correctly The
3, the motor is flushing, the motor cavity must be filled with distilled water (or clean water) before installation.
4, the pump's first impeller at least invasive water level below 3 meters, the pump unit intrusion below the hydrostatic level shall not be greater than 70 meters, the bottom of the motor from the bottom of the bottom shall not be less than 5 meters.
5, select the model when the diameter and pump models to match, avoid large diameter diameter selection of small diameter pump, which is not conducive to the motor cooling.
6, the water temperature is not higher than 120 ℃.
7, the water does not contain oil substances.
8, water salinity and water quality requirements: (the main indicators of corrosive substances)
(3) material description
1, impeller: cast iron HT200 or tin bronze (various grades) such as: ZCuSn3Zn8Pb6Ni1
2, the pump shell: cast iron HT200 or stainless steel such as: 2Gr13 .304
3, the pump shaft: cold drawn steel chrome, or stainless steel 2Gr13 (1050 ℃ quenched and tempered, reinforced torque)
4, motor seal: rubber seal O-ring; machine seal
(4) the scope of application
Applicable to enterprises and institutions such as: bath, district heating, business use of geothermal energy power generation, extraction of underground high temperature hot water, according to different diameter we have different specifications for the user to choose models. The device low noise, high efficiency and save energy.
(5) technical parameters
1, to allow the working temperature range: +5 to +105 ℃
2, solid impurity content (mass ratio) is not more than 0.01%
3, PH value (pH) 6.5-8.5
4, hydrogen sulfide content of not more than 1.5mg / L
5, chloride ion content of not more than 400mg / L
6, the unit must be completely invasive water work. Vertical use, select the model when the diameter and pump models to match, avoid large diameter diameter hole selection of small diameter pump, this is not conducive to the motor cooling.
(6) motor parameters
Diving motor cable length: 3m. Such as the user needs to extend the cable can advance call us, the submersible motor for the water lubrication, before use must be filled with clean water to the motor cavity, (Note: must be filled or will reduce the motor life) If you forget to add water motor Quickly burned out.
Motor protection class: IPX8
Electromagnetic wire with high temperature waterproof line.
Power: 380V, deviation of not more than ± 5%, frequency 50HZ, the deviation does not exceed ± 1%, if the customer needs a special voltage or special frequency need to inform us in advance.
(7) the advantages of equipment
1, in the factory's careful assembly to ensure the site quickly and reliably installed.
2, the use of single-stage impeller or multi-stage impeller series, the noise is minimal. Good temperature performance, long life
3, the unit can completely break the water work, to avoid the vacuum pump is easy to use the air is not easy to use the drawbacks.
(8) Scope of supply
Hot water submersible pump unit (including the pump and the submersible motor composed of two parts), a pair of outlet flanges, 14 × 60 bolts 8. Or configure the corresponding outlet (to facilitate the user to install the hose installation) to use a maintenance manual, a certificate of 1 copies of a packing box, wooden box packaging.

Hot springs hot water submersible pump use notes have what

Hot spring hot water submersible pump use precautions
1, before using this product, please read the instructions carefully.
2, the motor must be equipped with start-up cabinet, start the cabinet with short circuit, phase, overload and other protection functions, the unit is completed after the commissioning. Note that after the normal operation must be activated cabinet protection measures to adjust the value of the appropriate location.
3, the pump must be filled with water before the wells, add water when the pump should be placed vertically, avoid the level of placement (to prevent false water level, resulting in motor water burned).
4, the pump must be installed with the installation of pump short tube, the motor and pump body must be flexible after the joint, and then drill the top hole and tighten the top wire. To slow down when lifting (to prevent damage to the unit)
5, the diameter of the water pipe to be matched with the pump, should not be too large or too small.
6, submersible pumps in special occasions (non-deep well occasions), must be reliable grounding, pay attention to safety.
7, stop pump and pump need a certain interval (not less than 5 minutes).
8, the pump is strictly prohibited without water operation, is strictly prohibited close to the work area.
9, to prevent electric shock, maintenance or maintenance must cut off the power.
10, the group installation, when the pump into the static water level should be measured on the ground insulation resistance, its value shall not be less than 5 megohms.
11, down the cable when the cable should be firmly tied in the water pipe, and fixed in the flange trough.

QS small submersible pump installation using technical support

1, after the box check QS small submersible pump nameplate model specifications are consistent with the actual use.
2, select the connection with the small submersible pump caliber to match the pipe, and then tighten the hoop.
3, choose to use the power supply voltage of 380 ± 5% volts, the power frequency should be 50 Hz.
4, with 500 V megger, measuring winding on the chassis insulation resistance of not less than 150MΩ.
5, such as the use of small submersible pumps from the power source far away (generally should not exceed 200 meters), in order to ensure QS small submersible pump pressure drop fluctuations are not too large, please refer to the table recommended by the power cable Corresponding bold, and its joints are applied with solder paste. After welding with insulating waterproof bandage (prohibited in the submersible pump water level below the wiring).
6, shall not be discharged mud, dung, sewage, dirt and other corrosive media.
7, before using the screw screw and deflated screw, the motor cavity should be filled with clean water, tighten the water screw can be used before the water.
8, QS small submersible pump in the operation may not be dehydrated operation (recommended installation of automatic water level controller) to always observe the voltage, current and pump flow, should ensure that the pump running under rated conditions.
9, QS small submersible pump in the winter when the suspension should be exhausted in the machine filled with water to prevent cracking. Placed in a place where the ventilation is dry and non-corrosive. Apply the screwdriver into the impeller once every time to prevent the pump from being embroidered

Fountain pump equipment after the completion of the debugging work

With the development of society, the fountain has become an indispensable part of urban construction, when the fountain pump equipment is installed, how should the equipment debugging work?
1. Check before power-on
Before powering the installation environment should check whether the requirements, fountain pump equipment is damaged, wiring or loose, off. Check the switch, wire diameter, connection, configuration is safe, the layout is reasonable.
2. Debugging
Debugging work, pay attention to the fountain pump is not through the inverter access to the bottom of the three-phase leakage switch, with three-phase AC direct start. If there is internal leakage, short circuit and other issues, timely treatment, troubleshooting.
3. Connect the fountain pump to the inverter. On the control panel of the inverter, the function code is set to 50Hz, and then the frequency is gradually increased from small to observe whether the inverter and fountain pump are abnormal.
4. Fountain If the water is not high, you need to re-adjust the water nozzle jet and flow, only in the device to re-set the target frequency can be.
In addition to fountain pump inspection, also need to pay attention to underwater lights debugging. Pay attention to whether the water into the water, the first to each channel lights connected to the bottom of the leakage switch, all the way to brighten the underwater lights, lights and timely replacement, and then access the light controller, fine-tune the lighting control effect.
Debugging work is correct, you can rest assured that the operation

Selection principle and selection steps of fountain pump

First, the fountain pump selection principles

Fountain pump is a kind of surface wide variety of general-purpose machinery and equipment, fountain pumps are widely used in petroleum, chemical, electric power metallurgy, mining, shipbuilding, light industry, agriculture, civil and defense sectors, occupies an important national economy status. Vigorously reduce the fountain pump energy consumption, energy conservation with a very significant significance.

In recent years, the pump industry has designed and developed many energy efficient products, such as IHF, CQB, FSB, UHB and other models of pump products, to reduce the energy consumption of the pump played a positive role. But in all fields of the national economy, due to the irrational selection, many of the pumps in an unreasonable operating conditions, operating efficiency is low, a lot of energy wasted. Some pumps because of unreasonable selection, can not be used, or the use of maintenance costs, low economic efficiency. Thus, the rational choice of the same energy-saving pump is also important.

The so-called rational election pump, is to consider the pump unit and pump station investment and operating costs and other comprehensive technical and economic indicators, so that in line with economic, security, the principle of application. Specifically, the following aspects:

1, to meet the requirements of the use of flow and head, which requires the pump operation point (device performance curve and pump performance curve of the intersection) often remain in the high-performance range of operation, so that both power and damage to mechanical parts.

2, the choice of fountain pump is not only small size, light weight, low cost, but also has good characteristics and high efficiency.

3, the fountain pump has good anti-cavitation performance, so that both reduce the depth of excavation pump, fountain pump does not make cavitation, smooth operation, long life.

4, the selected fountain pump construction pump station, less investment, low operating costs.

Second, fountain pump selection steps

(1) Data:

1, the media properties: media name, specific gravity, viscosity, corrosion, toxicity and so on.

2, the medium contained in the particle diameter, content.

3, the required flow: general industrial pumps in the process can ignore the leakage in the pipeline system, but must consider the process of change in the impact of traffic. Agricultural pumps If the use of open channel water, but also must consider the leakage and evaporation.

4, pressure: suction tank pressure, drainage tank pressure, pipe system pressure drop (head loss).

5, the pipeline system data: diameter, length, pipe type and number of accessories, sink to the pressure tank geometric elevation.

In the design layout pipeline, should note the following:

A, reasonable choice of pipe diameter, pipe diameter, at the same flow rate, the flow velocity is small, the resistance loss is small, but the price is high, the pipe diameter is small, will lead to a sharp increase in resistance loss, the selected pump head increase, With the increase in power, costs and operating costs have increased. So should be considered from the technical and economic point of view.

B, the exhaust pipe and its joints should consider the maximum pressure can withstand.

C, pipe layout should be arranged as straight as possible to minimize the pipe fittings and to minimize the length of the pipe must be turned when the bending radius of the elbow pipe diameter should be 3 to 5 times the angle as much as 90 Lt; 0 & gt; C.

D, the pump must be installed on the discharge side of the valve (ball valve or globe valve, etc.) and check valve. The valve is used to adjust the operating point of the pump. The check valve prevents the pump from reversing when the liquid is backflow and prevents the pump from hitting the water hammer. (When the liquid backflow, it will have a huge reverse pressure, damage to the pump)

(2) determine the flow

A, if the production process has been given the minimum, normal, maximum flow, the maximum flow should be considered.

B, if the production process only gives the normal flow, should consider leaving a certain margin.

For ns> 100 high flow low unexpected pump, the flow margin to take 5%, for ns <50 of the small flow and pump, the flow margin to take 10%, 50 ≤ ns ≤ 100 pump, the flow margin Take 5%, poor quality and poor operating conditions of the pump, the flow margin should be taken 10%.

C, if the basic data only to the weight flow, should be converted into volumetric flow.