CN114183333B - Submersible pump testing device and submersible pump testing method - Google Patents
Submersible pump testing device and submersible pump testing method Download PDFInfo
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- CN114183333B CN114183333B CN202111279563.5A CN202111279563A CN114183333B CN 114183333 B CN114183333 B CN 114183333B CN 202111279563 A CN202111279563 A CN 202111279563A CN 114183333 B CN114183333 B CN 114183333B
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- 238000012360 testing method Methods 0.000 title claims abstract description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 210
- 238000005192 partition Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000008400 supply water Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 229910052742 iron Inorganic materials 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The submersible pump testing device comprises an overflow water tank, a lifting platform and a testing device for detecting the performance of the water pump, wherein the lifting platform is arranged at the edge of the overflow water tank, and the testing device comprises a flow testing unit, a pressure testing unit, an electronic rocking meter, an electrical performance testing unit, a noise testing unit and a vibration testing unit. The submersible pump testing method comprises the steps of controlling a lifting platform to move to a target depth position in a first water tank of an overflow water tank; starting a water delivery pump and a test pump, and collecting water pump performance data by a test device; and comparing the performance data with a standard parameter range, and judging that the submersible pump has a problem if the performance data is not in the standard parameter range. The invention comprehensively and accurately ensures that the faults of the water pump can be found or the faults generated in the river experiment can be reproduced by comprehensively simulating the environment in the river experiment.
Description
Technical Field
The invention belongs to the field of water pump detection, and particularly relates to a submersible pump testing device and a submersible pump testing method.
Background
The river physical model test predicts the water and sand movement and the river bed evolution, the prototype landform is scaled into a model according to a certain scale by utilizing the fluid dynamics knowledge, and the influence of the flow field change on the terrain or the structure is simulated in the model to reversely deduce or predict the influence of the prototype flow field change on the terrain or the structure. In the model, water flow is required to be simulated, water flow power is generally provided by submersible pumps, the most common use is QS500 series submersible pumps produced by Taifeng water pump factories, the volume is proper, the flow is moderate, and the whole river model takes a Zhejiang channel boat railway bridge whole model as an example, more than 70 submersible pumps are required to be used simultaneously, and the model is densely distributed on each boundary gate of the model.
From the aspect of water pump use, because the river physical model is generally longer in period and has the characteristic of discontinuity, the model reservoir can be drained irregularly, the use of the submersible pump has the characteristics of concentrated use time, high strength, longer idle period, exposure to air and the like, the specific use conditions lead to high failure rate of the submersible pump, the submersible pump works in a semi-closed reservoir, hydraulic technicians cannot judge the running state of the water pump, and because the number of the submersible pumps working at the same time is large, if a part of the water pumps run in an abnormal state, the accuracy and repeatability of the model test can be influenced, and meanwhile, the safety aspect has hidden trouble; in the test process, after the water pump is suspected to have a problem, hydraulic technicians cannot confirm the specific fault water pump, and two solutions exist in practice: 1. the new pumps are adopted to replace suspected problem pumps in batches, and the test is continuously completed through continuous combination attempts; 2. the suspected problem is sent back to the manufacturer for maintenance or testing, and the cost is high and time-consuming. Therefore, the problem that the water pump fails but cannot be rapidly checked and detected exists in the river model experiment site, the experiment process is affected, and certain potential safety hazards are caused. The water pump can be problematic largely due to environmental impact. The water pump may be subjected to different effects in different environments, such as different depths, which may cause different problems with the water pump. At present, a detection device does not exist, and can comprehensively simulate the working environment of a water pump and test the water pump.
Disclosure of Invention
The invention aims to provide a water pump testing device which aims to solve the technical problem of comprehensively detecting a submersible pump in a simulated environment.
In order to solve the technical problems, the specific technical scheme of the submersible pump testing device and the submersible pump testing method provided by the invention is as follows:
the utility model provides a immersible pump testing arrangement, includes overflow pond, take off and land platform and detects water pump performance's testing arrangement, take off and land the platform setting and at overflow pond edge, testing arrangement includes flow test unit, pressure test unit, electronic rocking meter, electrical property test unit, noise test unit and vibrations test unit.
Further, the overflow water tank comprises a first water tank and a second water tank, and the lifting platform is arranged at the edge of the first water tank. A partition wall is arranged between the first water tank and the second water tank, a water outlet pipe is arranged on the partition wall, and a flow test unit is arranged on the water outlet pipe. The pressure test unit is arranged on the water outlet pipe.
Further, the lower part of the partition wall is provided with a water inlet pipe communicated with a first water tank and a second water tank, and the second water tank is provided with a water delivery pump which is connected with the water inlet pipe.
Further, a first water tank is provided with an energy dissipation blind ditch, and the energy dissipation blind ditch is positioned between the partition wall and the lifting platform.
Further, the lifting platform comprises a screw rod lifter and a fixed bracket which are connected with each other.
Further, the flow test unit, the pressure test unit, the electronic megger, the electrical performance test unit, the noise test unit and the vibration test unit are all connected with the acquisition and conversion module, and the acquisition and conversion module is connected with a computer.
The invention also provides a submersible pump testing method for solving the technical problems, which comprises the following steps:
Controlling the lifting platform to move to a target depth position in a first water tank of the overflow water tank; starting a water delivery pump to supply water to the first pool; the water in the overflow pool keeps overflowing; starting a submersible pump to be detected to drain water to a second water tank; the testing device collects water pump performance data; and comparing the performance data with the standard parameter range, and judging that the submersible pump has a problem if the performance data is not in the standard parameter range.
Further, the water delivery pump is started first, and then the submersible pump to be detected is started.
The submersible pump testing device and the submersible pump testing method have the following beneficial effects: the immersible pump is placed in the overflow pond through the platform that takes off and land, and the degree of depth of placing is the same with the degree of depth when river test, can guarantee through the overflow pond that working water level is invariable, and test state is unanimous with test state, has comprehensively simulated the environment when river test, more accurately ensures that the trouble of water pump can be found or reappear.
Meanwhile, through a series of tests, indexes such as vibration conditions, output pressure, output lift, noise conditions, low-frequency working states, low-pressure starting performance, high-pressure resistance performance, flow curves and the like of the water pump are included, the working states of the water pump can be comprehensively and in detail known and determined, and meanwhile, safety performance indexes of the water pump can be detected to judge whether the submersible pump has problems.
The device area is little, can arrange and test at model test scene, adopts electric lift mode simultaneously, and the installation and the dismantlement of water pump are all very convenient. By adopting an integrated design, multiple data information can be obtained after the water pump is started and electrified once, and the test of all indexes only needs 3-5 minutes, so that the water pump has the characteristics of high efficiency and rapidness, can rapidly detect the running state of the water pump on site, and provides powerful data support for the next step of processing.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a lifting platform according to the present invention;
Fig. 3 is a schematic plan view of a square iron plate according to the present invention.
Detailed Description
For a better understanding of the objects, structures and functions of the present invention, a submersible pump testing device and a submersible pump testing method according to the present invention will be described in further detail below with reference to the accompanying drawings.
Figure 1 shows the overall structure of the submersible pump testing device of the present invention. As shown in figure 1, the submersible pump testing device mainly comprises an overflow water pool simulating the working environment of the water pump, a lifting platform of the lifting water pump, a water outlet pipe for conveying water pumped by the water pump and a testing device for detecting the performance of the water pump. The lifting platform is arranged at the bottom edge of the overflow water tank, a test water pump 20 is fixed on the platform, the test water pump 20 is connected with the water outlet pipe, and the test device comprises a flow test unit, a pressure test unit, an electronic rocking meter, an electrical performance test unit, a noise test unit and a vibration test unit.
The overflow pool comprises a side wall 11 at the edge of the pool, a partition wall 12 dividing a large pool into two small pools, a first pool 13 and a second pool 14 which are provided with a testing device. The bottom of partition wall 12 is equipped with the inlet tube 121 in UNICOM No. one pond 13 and No. two ponds 14, and No. two ponds 14's inside is equipped with water pump 141, and water pump 141 is connected with inlet tube 121, and the water in No. two ponds 14 is taken out No. one pond 13 through inlet tube 121 in partition wall 12 bottom during the test for No. one pond 13 keeps the overflow state always. The side wall 11 cannot be lower than the partition wall 12, and the other walls except the wall on the side of the fixed lifting platform need to be reinforced, and the rest walls can be single brick walls.
In this embodiment, the overflow pool is a rectangular pool with a length of 3m and a width of 1.5m, the side wall 11 is 2m high, the middle is divided into two small pools by a partition wall 12, and the partition wall 12 is 1.5m high. The initial water level of the first water tank 13 is consistent with the height of the partition wall 12, the water level of the second water tank 14 is half of the height of the partition wall 12, the test water pump 20 pumps water from the first water tank 13 to the second water tank 14, and the water of the second water tank 14 is pumped to the first water tank 13 by the water delivery water pump 141, so that the first water tank 13 always maintains an overflow state. The water delivery efficiency of the water delivery pump is greater than that of the test water pump, and overflowed water directly enters the No. two water tank 14. If the water body needs to be buffered when entering the first water tank 13 or the second water tank 14, the energy dissipation blind ditch can be additionally arranged in the first water tank 13 or the second water tank 14. If buffering is needed, energy dissipation blind ditches can be additionally arranged in the first water tank 13 and the second water tank 14 respectively. The energy dissipation blind ditch comprises a two-layer structure, wherein the first layer is a porous plate with uniformly distributed holes and is used for dissipating energy of fluid and primarily decelerating water flow; the second layer is a blind ditch and is of a block-shaped structure woven by iron wires and used for further buffering and stabilizing fluid and buffering water flow to the greatest extent.
The lifting platform is a screw rod lifting structure and is fixed at the side wall 11 of the edge of the overflow pool. As shown in fig. 2, the lifting platform is composed of a base 21, a screw rod lifter and a fixed bracket, and can be lifted and lowered electrically. In this embodiment, the base 21 is a thick steel plate with 9 screw holes, and is fixed to the edge of the first pool 13 by chemical bolts. The reason for adopting the chemical bolts is that the whole platform, the water pump and other test units have heavy total mass and can not shake in the test.
The screw rod lifter is fixed on the base 21, and the screw rod lifter includes screw rod 22 and driving motor 23, and driving motor 23 sets up on the side wall 11, and screw rod 22 lower extreme and fixed bolster are connected, and screw rod 22 and driving motor 23 pass through a pair of helical gear group interlock and are connected, and driving motor 23 drives screw rod 22 rotation through corotation or reversal, and screw rod 22 rotates and drives the fixed bolster and reciprocate, speed and distance adjustable control.
The fixing bracket comprises an internal thread pipe 24, a square iron plate 25 and a smooth steel pipe 26. A square iron plate 25 is fixed to the bottom end of the test water pump 20. In this embodiment, the test pump 20 is welded to a 15cm long internally threaded tube 24 by a transverse steel rod, or may be removably connected by other means. The internal thread pipe 24 is sleeved on the screw rod 22, the inner wall of the internal thread pipe 24 is provided with spiral threads corresponding to the screw rod 22, and the screw rod 22 can rotate to drive the internal thread pipe 24 to move up and down and drive the water pump to move up and down. As shown in fig. 3, the square iron plate 25 has four circular openings. Four round steel pipes 26 with the diameter of 4cm are vertically fixed upwards on the base 21 and penetrate through the square iron plates 25, so that the water pump is stable in the up-and-down moving process and does not shake left and right. The fixing bracket is used for fixing the test submersible pump, and can fix and transport the test water pump 20 to a certain depth under water and then stop. In addition, other limiting structures can be arranged on the square iron plate 25, and the internal thread pipe 24 is connected with the square iron plate 25 through the limiting structures, for example, the square iron plate 25 is fixedly connected through bolts.
In this embodiment, the testing device includes a flow testing unit, a pressure testing unit, an electronic cradle, an electrical performance testing unit, a noise testing unit, a vibration testing unit, and a computer. The water outlet of the test water pump 20 is provided with a flange, and under the condition of a certain submerged water depth, the output flow and the input voltage frequency have a definite corresponding relation.
In this embodiment, the water outlet pipe is used to send the water pumped by the test water pump 20 in the first water tank 13 to the second water tank 14. As shown in fig. 1, the outlet pipe is fixed to the partition wall 12. The water outlet pipe comprises a flow test water pipe 31, the diameter of the flow test water pipe 31 is consistent with the diameter of the outflow port of the test water pump 20, the bottom end of the flow test water pipe is provided with a flange, and the flow test water pipe is vertically connected to the water outlet of the test water pump 20 through the flange. The other end of the flow test water pipe 31 is connected with a hose 33, and the hose 33 is connected with a horizontally placed water pipe through a coupling device. In this embodiment, coupling device is an L type interface, wholly is the iron material, and both ends are flange interface, and both ends all are connected with water pipe, and the water pipe is transparent sub gram force pipe, and water pipe 31 can change according to actual demand and install additional, makes equipment have more economic effect.
In this embodiment, the pressure testing unit is composed of a high-precision film pressure sensor and a pressure-bearing drainage tube 32, the pressure-bearing drainage tube 32 is arranged on a vertical flow testing water pipe 31, the pressure sensor is communicated with the flow testing water pipe 31 through the pressure-bearing drainage tube, and the outlet pressure of the water pump is measured when the testing water pump 20 works. In the embodiment, the pressure sensor is a pressure transmitter, the output signal is an analog signal of 4-20mA, and the data is uploaded to a computer through the collection conversion module.
The flow test unit is a high-precision electromagnetic flowmeter 34, the high-precision electromagnetic flowmeter is installed in the middle section of a horizontal pipeline, two pipelines are connected to the front and the rear of the electromagnetic flowmeter 34, the length of each pipeline is 5 times that of the pipeline, the flowmeter is connected with a computer through a collecting and converting module, the diameter of the flowmeter is consistent with that of each pipeline, and the water outlet flow of the test water pump 20 is accurately measured.
In this embodiment, the electronic cradle is fixed on the landing platform, is connected to the test water pump 20 through three leads, and tests the insulation resistance between the three phases of the water pump 20 and the insulation performance of the water pump housing by applying high voltage. The electronic megger is an intelligent 500V-1000V electrician megger insulating meter.
The vibration test unit is a vibration sensor, can convert vibration signals into analog signals, and then the analog signals are uploaded to a computer through the collection conversion module. During testing, the vibration sensor is fixed on the submersible pump through magnetic adsorption, and vibration conditions of the water pump in the starting and stopping and running processes are monitored and recorded. In this embodiment, the vibration sensor needs to be waterproof, and is fixed to the lower end of the sensor through AB glue with the ferromagnetic neodymium magnet, where the neodymium magnet is used as a base of the vibration sensor.
In this embodiment, the noise testing unit is a precise decibel tester with display, is arranged in the middle of the side wall 11 and is positioned at the lower part, and is mainly used for detecting the sound condition of the submersible pump when the submersible pump runs under the water of 0.5m, changing the running frequency of the water pump through the frequency converter during testing, and monitoring the working sound condition of the submersible pump under different frequencies. The decibel tester is used for storing and deriving measurement data.
In this embodiment, the electrical performance testing unit mainly includes a frequency converter, a low-voltage module, a high-voltage low-current module, which can be switched by a manual switch to test different performance indexes of the submersible pump, and the unit is placed at the periphery of the overflow water tank. The frequency converter can change the power supply frequency of the water pump, and the low-voltage module provides voltage lower than 380V for the water pump, and the high-voltage low-current module provides direct current power supply mainly providing 3750V voltage 5 mA. The frequency converter is used as a main power supply mode of the submersible pump, is connected with the submersible pump to change the output frequency of the submersible pump, test the low-frequency starting capability and test the output flow of each frequency; the low-voltage module is mainly used for testing the starting performance of the submersible pump under the industrial voltage (380V); the high-voltage low-current module mainly provides a 3750V direct-current power supply with voltage of 5mA, observes whether breakdown or flickering occurs, and tests the high-voltage resistance of the submersible pump. The frequency converter is selected as an F800 series frequency converter of Mitsubishi, the low-voltage module is selected as a three-phase dry-type isolation transformer, and the high-voltage low-current module is selected as a VC60E+ digital high-voltage megohmmeter 2500V/5000V series instrument.
The acquisition conversion module mainly converts analog signals of various sensors into digital signals and uploads the digital signals to a computer by a modbus protocol, adopts a ZKA-4000 acquisition module of Shenzhen comprehensive intelligent control technology development limited company, has an 8-path analog quantity access port, and is connected with a vibration test unit, a pressure test unit and a flow test unit to synchronously acquire various index signals in real time. In this embodiment, the collecting and converting module is fixed above the base 21 of the lifting platform, and needs to be subjected to waterproof treatment.
The computer is connected with the acquisition and conversion module and is used for acquiring and displaying data information such as vibration, pressure, flow and the like of the water pump. In this embodiment, the computer is selected from H610 industrial personal computers of Ministry of China.
When the water pump is used, water is firstly injected into the water tank, the water delivery pump 141 is started to supply water to the water tank 13 until the initial water level of the water tank 13 is consistent with the height of the partition wall 12, the water level of the water tank 14 is half of the height of the partition wall 12, water in the overflow water tank is overflowed, the test water pump 20 to be tested is fixed on the fixed support, the lifting platform is controlled to move to a target depth position in the water tank 13 of the overflow water tank, the test water pump 20 to be tested is started to drain water to the water tank 13, the test water pump 20 pumps water from the water tank 13 to the water tank 14, the water delivery efficiency of the water pump 141 is greater than or equal to that of the test water pump pumps water from the water tank 14 to the water tank 13, so that the water tank 13 always maintains a full overflow state, and redundant water overflows from the water tank 13 to the water tank 14. And finally, acquiring performance data of the water pump through a testing device, comparing the performance data with a standard parameter range, and judging that the submersible pump has a problem if the performance data is not in the standard parameter range.
It will be understood that the application has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. The submersible pump testing device is characterized by comprising an overflow water tank simulating the working environment of a submersible pump in a river test, a lifting platform and a testing device for detecting the performance of the submersible pump, wherein the lifting platform is arranged at the edge of the overflow water tank, and the testing device comprises a flow testing unit, a pressure testing unit, an electronic rocking meter, an electrical performance testing unit, a noise testing unit and a vibration testing unit; the overflow water tank comprises a side wall and a partition wall for dividing the overflow water tank into a first water tank and a second water tank, and a water inlet pipe communicated with the first water tank and the second water tank is arranged at the bottom of the partition wall; a water delivery pump is arranged in the second water tank and connected with the water inlet pipe, so that the first water tank is always kept in an overflow state; the height of the side wall is not lower than that of the partition wall, and the side wall is used for enabling overflowed water to overflow from the first water tank to the second water tank directly;
The lifting platform consists of a base, a screw rod lifter and a fixed bracket, wherein the base is fixed on the edge of a first water tank, the screw rod lifter drives the fixed bracket to move up and down, and the test water pump is fixed on the fixed bracket;
The test water pump is the immersible pump, test water pump and outlet pipe connection send the water that No. one pond was taken out into No. two ponds.
2. The submersible pump testing device of claim 1, wherein the pressure testing unit is disposed on the outlet pipe.
3. The submersible pump testing device of claim 2, wherein the first water tank is provided with an energy dissipation blind ditch, and the energy dissipation blind ditch is located between the partition wall and the landing platform.
4. The submersible pump testing device of claim 3, wherein the flow testing unit, the pressure testing unit, the electronic cradle, the electrical performance testing unit, the noise testing unit, and the vibration testing unit are all connected with a collection and conversion module, and the collection and conversion module is connected with a computer.
5. A submersible pump testing method, characterized in that the submersible pump testing device according to any one of claims 1 to 4 is used, comprising the steps of:
Controlling the lifting platform to move to a target depth position in a first water tank of the overflow water tank; starting a water delivery pump to supply water to a first water tank, enabling water in an overflow water tank to overflow, starting a test water pump to be detected to drain water to a second water tank, and collecting test water pump performance data by a test device; and comparing the performance data with a standard parameter range, and judging that the submersible pump has a problem if the performance data is not in the standard parameter range.
6. The method of claim 5, wherein the water pump is started and then the test water pump is started.
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| CN114753995A (en) * | 2022-05-06 | 2022-07-15 | 核工业北京化工冶金研究院 | Device and method for detecting performance of submersible electric pump on ground surface of in-situ leaching uranium mining field |
| CN118293064B (en) * | 2024-05-21 | 2024-10-01 | 浙江神能科技股份有限公司 | Water pump characteristic measuring device |
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| CN207178242U (en) * | 2017-07-10 | 2018-04-03 | 四川省新津潜力泵业有限公司 | A kind of Performance Mea-surement of Submersible Motor Pumps system |
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| SU1368489A1 (en) * | 1986-03-14 | 1988-01-23 | Казахский Научно-Исследовательский Институт Водного Хозяйства | Stand for testing immersion pump units |
| CN2625611Y (en) * | 2003-06-17 | 2004-07-14 | 齐金生 | Simulant well-pipe device for submerged electric pump |
| CA2708843C (en) * | 2009-07-01 | 2014-01-21 | Baker Hughes Incorporated | System to measure vibrations using fiber optic sensors |
| CN202832672U (en) * | 2012-09-27 | 2013-03-27 | 上海梅山钢铁股份有限公司 | Circulating water balance water supply device |
| CN203023080U (en) * | 2012-11-29 | 2013-06-26 | 唐山开滦广汇设备制造有限公司 | Portable performance test device for submerged pump |
| RU2677026C1 (en) * | 2018-03-27 | 2019-01-15 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К.Аммосова" | Main mine drainage station |
| CN112922841B (en) * | 2021-02-05 | 2022-01-25 | 合肥恒大江海泵业股份有限公司 | Submersible electric pump with self-adaptive submersible depth adjusting mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183284A (en) * | 2011-04-14 | 2011-09-14 | 张广忠 | Liquid flow standard calibration device |
| CN207178242U (en) * | 2017-07-10 | 2018-04-03 | 四川省新津潜力泵业有限公司 | A kind of Performance Mea-surement of Submersible Motor Pumps system |
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