CN114183333A - Submersible pump testing device and method - Google Patents
Submersible pump testing device and method Download PDFInfo
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- CN114183333A CN114183333A CN202111279563.5A CN202111279563A CN114183333A CN 114183333 A CN114183333 A CN 114183333A CN 202111279563 A CN202111279563 A CN 202111279563A CN 114183333 A CN114183333 A CN 114183333A
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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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Abstract
A submersible pump testing device and a submersible pump testing method belong to the technical field of water pump detection. The submersible pump testing method comprises the steps of controlling the lifting platform to move to a target depth position in a first pool of an overflow pool; starting a water delivery pump and a test pump, and acquiring performance data of the water pump 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 simulates the environment of river work experiment through comprehensive simulation, and comprehensively and accurately ensures that the fault of the water pump can be found or can reproduce the fault generated in the river work 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 is an important means for predicting water and sand movement and river bed evolution, the fluid dynamics knowledge is utilized, the prototype landform is scaled into a model according to a certain scale, 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. The model needs to simulate water flow, usually a submersible pump is used for providing water flow power, the most common is QS500 series submersible pumps produced by Taifeng water pump plants, the size is appropriate, the flow is moderate, and the integral river model, for example, the integral model of Zhejiang channel railway bridge, needs to use more than 70 submersible pumps at the same time and is densely distributed at each boundary door of the model.
From the aspect of water pump use, as the river physical model is generally long in period and discontinuous in property, the model reservoir can be drained irregularly, the submersible pump is used for a long time, is high in strength, long in idle period, exposed in 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, and a hydraulic technician cannot judge the running state of the water pump; in the test process, after the water pump is suspected to have a problem, the hydraulic technical personnel can not confirm the concrete trouble water pump, and the actual solution has two: firstly, replacing suspected problem pumps in batches by adopting new pumps, and continuously completing the test through continuous combination attempts; and secondly, sending the suspected problem water pump back to a manufacturer for overhauling or testing, so that the cost is high and time is consumed. Therefore, the problem that the water pump fails to be rapidly checked and detected exists in a river model experiment site, the experiment process is influenced, and certain potential safety hazards are caused. Water pumps can be problematic, largely due to environmental influences. The water pump is subject to different influences in different environments, such as different depths, which may cause different problems to the water pump. At present, a detection device does not exist, the working environment of the water pump can be comprehensively simulated, and the water pump is subjected to inspection and test.
Disclosure of Invention
The invention aims to provide a water pump testing device to solve the technical problem of comprehensively detecting a submersible pump in a simulation 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 the testing arrangement who detects the water pump performance, and the platform setting of taking off and land is at overflow pond edge, and testing arrangement includes flow test unit, pressure test unit, electron megger, electric property test unit, noise test unit and vibrations test unit.
Furthermore, the overflow pond includes a pond and No. two ponds, and the platform that takes off and land sets up in a pond edge. 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 the flow testing unit is arranged on the water outlet pipe. The pressure test unit is arranged on the water outlet pipe.
Furthermore, the lower part of partition wall is equipped with the inlet tube of intercommunication first pond and No. two ponds, and No. two ponds are equipped with the water delivery pump, and the water delivery pump is connected with the inlet tube.
Furthermore, an energy dissipation blind ditch is arranged in the first water pool and is positioned between the partition wall and the lifting platform.
Further, the lifting platform comprises a screw rod lifter and a fixed support which are connected with each other.
Furthermore, 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 pool of the overflow water pool; starting a water delivery pump to supply water to the first water pool; the water in the overflow water tank keeps overflowing; starting the submersible pump to be detected to drain water to the second water pool; the testing device collects performance data of the water pump; 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 submersible pump is placed in the overflow tank through the lifting platform, the placed depth is the same as the depth of a river work test, the working water level can be guaranteed to be constant through the overflow tank, the test state is consistent with the test state, the environment of the river work test is comprehensively simulated, and the fault of the water pump can be found or reproduced more accurately.
Meanwhile, through a series of tests including indexes such as vibration conditions, output pressure, output lift, noise conditions, low-frequency working state, low-pressure starting performance, high-pressure resistance performance, flow curve and the like, the working state of the water pump can be comprehensively and detailedly known and determined, and meanwhile, safety performance indexes of the water pump can be detected to judge whether the submersible pump has problems or not.
The device has small floor area, can be arranged and tested on a model test site, and simultaneously adopts an electric lifting mode, so that the water pump is convenient to install and dismantle. By adopting an integrated design, various data information can be obtained by once power-on test when the water pump is started, and only 3-5 minutes are needed for testing all indexes of the water pump.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the elevating platform of the present invention;
fig. 3 is a schematic plan view of a square iron plate according to the present invention.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a submersible pump testing apparatus and a submersible pump testing method according to the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 shows the overall structure of the submersible pump testing device of the present invention. As shown in fig. 1, the submersible pump testing device mainly comprises an overflow pool for simulating the working environment of the water pump, a lifting platform for lifting the water pump, a water outlet pipe for transporting water flow pumped by the water pump, and a testing device for detecting the performance of the water pump. Wherein, the platform that takes off and land sets up at overflow pond bottom border, is fixed with test water pump 20 on the platform, and test water pump 20 and play water piping connection, testing arrangement then include flow test unit, pressure test unit, electron megger, electric property test unit, noise test unit and vibrations test unit.
The overflow pool comprises a side wall 11 at the edge of the pool, a partition wall 12 for dividing the large pool into two small pools, a first pool 13 and a second pool 14, wherein the first pool and the second pool are provided with testing devices. The bottom of partition wall 12 is equipped with the inlet tube 121 of No. one pond 13 of UNICOM and No. two ponds 14, and the inside of No. two ponds 14 is equipped with water delivery water pump 141, and water delivery water pump 141 is connected with inlet tube 121, draws the water in No. two ponds 14 to No. one pond 13 through the inlet tube 121 of partition wall 12 bottom during the test for No. one pond 13 keeps the overflow state always. The height of the side wall 11 cannot be lower than that of the partition wall 12, and except that the wall on the fixed lifting platform side needs to be reinforced, 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 walls 11 are 2 m high, the middle of the overflow pool 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, water is pumped from the first water tank 13 to the second water tank 14 by the test water pump 20, and water in 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 is always in an overflowing 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 second water pool 14. If the water body needs to be buffered when entering the first water pool 13 or the second water pool 14, an energy dissipation blind ditch can be additionally arranged in the first water pool 13 or the second water pool 14. If buffering is needed, energy dissipation blind ditches can be additionally arranged in the first water pool 13 and the second water pool 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 the french drain, for the massive structure that the iron wire was woven for further cushion steadily with the fluid, but furthest's buffering rivers.
The lifting platform is a screw rod lifting structure and is fixed on the side wall 11 at the edge of the overflow water pool. As shown in fig. 2, the lifting platform is composed of a base 21, a screw rod lifter and a fixed support, and can be lifted electrically. In this embodiment, the base 21 is a thick steel plate with 9 screw holes, and is fixed at the edge of the first water tank 13 by chemical bolts. The reason for using chemical bolts is that the total mass of the entire platform, water pump and other test units is heavy and there cannot be any play during the test.
The lead screw lift is fixed on the base 21, the lead screw lift comprises a lead screw 22 and a driving motor 23, the driving motor 23 is arranged on the side wall 11, the lower end of the lead screw 22 is connected with the fixed support, the lead screw 22 and the driving motor 23 are connected in an occluded mode through a pair of bevel gear sets, the driving motor 23 drives the lead screw 22 to rotate through positive rotation or reverse rotation, the lead screw 22 drives the fixed support to move up and down, and the speed and the distance can be controlled in an adjustable mode.
The fixing bracket comprises an internal threaded 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 water pump 20 is welded to a 15cm long internal threaded pipe 24 via a transverse steel rod, or detachably connected via 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 a spiral thread corresponding to the screw rod 22, and the screw rod 22 can drive the internal thread pipe 24 to move up and down by rotation to drive the water pump to move up and down. As shown in fig. 3, the square iron plate 25 has four round openings. Four smooth steel pipes 26 with the diameter of 4cm are vertically fixed upwards on the base 21 and penetrate through the square iron plate 25, so that the stability of the water pump in the up-and-down moving process is guaranteed, and the water pump does not shake left and right. The fixing support is used for fixing the test submersible pump, and can fix the test submersible pump 20 and transport the test submersible pump 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 threaded pipe 24 and the square iron plate 25 are connected through the limiting structures, for example, the square iron plate is fixed through bolts.
In this embodiment, the testing device includes a flow testing unit, a pressure testing unit, an electronic megger, an electrical performance testing unit, a noise testing unit, a vibration testing unit, and a computer. The test water pump 20 outflow port is provided with a flange, and under the condition of certain submerged water depth, the output flow and the input voltage frequency have a clear corresponding relation.
In this embodiment, the water outlet pipe is used for conveying the water pumped by the test water pump 20 in the first water tank 13 into the second water tank 14. As shown in fig. 1, the outlet pipe is fixed to the partition 12. The outlet pipe includes flow test water pipe 31, and flow test water pipe 31 diameter is unanimous with test water pump 20 outflowing port diameter, and the bottom disposes the flange, connects perpendicularly on test water pump 20's delivery port 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 arranged water pipe through a coupling device. In this embodiment, the coupling device is an L-shaped adapter, and is entirely made of pig iron, and both ends are flange connectors, and both ends are all connected with the water pipe, and the water pipe is transparent ya keli pipe, and water pipe 31 can be changed according to actual demand and install additional, makes equipment have more economic effect.
In this embodiment, the pressure test 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 the vertical flow test water pipe 31, and the pressure sensor is communicated with the flow test water pipe 31 through the pressure-bearing drainage tube to measure the pressure of the outflow opening of the water pump when the test 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 set conversion module.
The flow test unit is high accuracy electromagnetic flowmeter 34, installs in horizontal pipeline middle section, and two pipelines are being connected around electromagnetic flowmeter 34, and the length of pipeline is 5 times of pipeline diameter, and the flowmeter is connected with the computer through gathering conversion module, and the flowmeter diameter is unanimous with the pipeline, and the outlet water flow of accurate measurement test water pump 20.
In this embodiment, the electronic megger is fixed on the platform that takes off and land, links to each other with test water pump 20 through three lead wires, tests the insulating resistance between the water pump 20 three-phase and the insulating properties of water pump housing through exerting high pressure. The electronic megger model is 500V-1000V intelligent electrician megger insulating meter.
The vibration testing unit is a vibration sensor, can convert a vibration signal into an analog signal, and then uploads the analog signal to a computer through the integration and conversion module. During testing, the vibration sensor is fixed on the submersible pump through magnetic adsorption, and the vibration condition of the water pump in the starting, stopping and running processes is monitored and recorded. In this embodiment, the vibration sensor needs to be waterproof, and fixed with the strong magnetic neodymium magnet through AB glue at the sensor lower extreme, and the neodymium magnet is as the base of vibration sensor.
In this embodiment, the noise test unit is a precise decibel tester with display, is arranged at the lower part of the middle of the side wall 11, and is mainly used for detecting the sound condition of the submersible pump when the submersible pump operates at 0.5m underwater, changing the operating frequency of the water pump through a frequency converter during testing, and monitoring the working sound condition of the submersible pump at different frequencies. The decibel tester is used for storing and exporting the measured data.
In this embodiment, the electrical performance test unit mainly includes converter, low pressure module, high-pressure low current module, and the different performance index of test immersible pump is switched through manual switch to the three, and this unit is placed in overflow pond periphery. The frequency converter can change the power supply frequency of the water pump, the low-voltage module provides the voltage lower than 380V for the water pump, and the high-voltage low-current module provides a 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, tests the low-frequency starting capability and tests the output flow of each frequency; the low-voltage module is mainly used for testing the starting performance of the submersible pump at the voltage lower than the industrial voltage (380V); the high-voltage low-current module is mainly used for providing a 3750V voltage 5mA direct-current power supply, observing whether a breakdown or flicker phenomenon exists or not and testing 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 and 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 City Sunjian Chikouchi science and technology development Limited company, has 8 paths of analog quantity access ports, and is simultaneously connected with the vibration test unit, the pressure test unit and the flow test unit to synchronously acquire various index signals in real time. In this embodiment, the acquisition and conversion module is fixed above the base 21 of the take-off and landing platform, and waterproof treatment needs to be performed.
The computer is connected with the acquisition and conversion module and is used for acquiring and displaying data information of the water pump, such as vibration, pressure, flow and the like. In this embodiment, the computer is selected from H610 industrial computers of Hua science and technology (China) Inc.
When the test device is used, water is injected into the water tank firstly, the water conveying pump 141 is started to supply water into the first water tank 13 until 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 water of the overflow water tank keeps overflowing, the test water pump 20 to be tested is fixed on the fixed support, the lifting platform is controlled to move to the target depth position in the first water tank 13 of the overflow water tank, the test water pump 20 to be tested is started to drain water into the second water tank 13, the test water pump 20 pumps the water into the second water tank 14 from the first water tank 13, the water conveying pump 141 pumps the water into the first water tank 13 from the second water tank 14 by using the water conveying efficiency of the water pump to be tested, the first water tank 13 keeps an overflowing state all the time, and redundant water directly overflows from the first water tank 13 to the second 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 problems if the performance data is not in the standard parameter range.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a immersible pump testing arrangement, its characterized in that, includes overflow pond, take off and land platform and the testing arrangement who detects the water pump performance, take off and land the platform sets up overflow pond edge, testing arrangement includes flow test unit, pressure test unit, electron megger, electric property test unit, noise test unit and vibrations test unit.
2. The submersible pump testing arrangement of claim 1, wherein the overflow basin comprises a first basin and a second basin, and the landing platform is disposed at an edge of the first basin.
3. The submersible pump testing device according to claim 2, wherein a partition wall is arranged between the first water pool and the second water pool, a water outlet pipe is arranged on the partition wall, and the flow testing unit is arranged on the water outlet pipe.
4. The submersible pump testing arrangement of claim 3, wherein the pressure test unit is provided on the outlet pipe.
5. The submersible pump testing device according to claim 3, wherein a water inlet pipe for communicating the first water tank and the second water tank is arranged at the lower part of the partition wall, and a water delivery pump is arranged in the second water tank and connected with the water inlet pipe.
6. The submersible pump testing device of claim 3, wherein an energy dissipation blind ditch is arranged in the first water pool and is positioned between the partition wall and the take-off and landing platform.
7. A submersible pump testing arrangement according to any of claims 1-6, wherein the landing platform comprises a screw lift and a fixed bracket connected to each other.
8. The submersible pump testing arrangement of claim 7, wherein 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 a collection and conversion module, the collection and conversion module being connected to a computer.
9. A submersible pump testing method is characterized in that: the method comprises the following steps:
controlling the lifting platform to move to a target depth position in a first water pool of the overflow water pool; starting a water delivery pump to supply water to a first water pool, keeping the water in an overflow water pool overflowing, starting a test water pump to be detected to drain water to a second water pool, and collecting performance data of the water pump 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.
10. The method of claim 9, wherein the submersible pump to be tested is started after the water pump is started.
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| CN202111279563.5A CN114183333A (en) | 2021-10-28 | 2021-10-28 | Submersible pump testing device and method |
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| CN202111279563.5A CN114183333A (en) | 2021-10-28 | 2021-10-28 | Submersible pump testing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN112922841A (en) * | 2021-02-05 | 2021-06-08 | 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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- 2021-10-28 CN CN202111279563.5A patent/CN114183333A/en active Pending
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| SU1368489A1 (en) * | 1986-03-14 | 1988-01-23 | Казахский Научно-Исследовательский Институт Водного Хозяйства | Stand for testing immersion pump units |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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