CN113175437B - Water pump lift testing device and water pump lift testing method - Google Patents
Water pump lift testing device and water pump lift testing method Download PDFInfo
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- CN113175437B CN113175437B CN202110501543.1A CN202110501543A CN113175437B CN 113175437 B CN113175437 B CN 113175437B CN 202110501543 A CN202110501543 A CN 202110501543A CN 113175437 B CN113175437 B CN 113175437B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 325
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000008400 supply water Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention provides a water pump lift testing device and a water pump lift testing method, which comprise the following steps: the water tank for placing the water pump to be tested is used for measuring the lift of the water pump to be tested and a water level height gauge arranged perpendicular to the liquid level of the water tank, the water supply pump for supplying water to the water tank and the switch valve for controlling the water discharge of the water tank are arranged in the water tank, the liquid level detector for sending out a water level electric signal corresponding to the water level change is arranged in the water tank, and the controller for keeping the water level unchanged by the water supply pump and the switch valve is controlled according to the comparison result of the water level electric signal and a preset water level signal. The invention can effectively solve the problem of inaccurate detection result caused by water level change in the test process by automatically adjusting the water level of the water tank to keep the water level at the preset height, thereby greatly reducing the labor intensity of workers. And can realize that a plurality of water pumps detect simultaneously, promote water pump lift detection efficiency greatly. And the preset water level signal can be changed to test the water pump lifts of different styles.
Description
Technical Field
The invention relates to the field of water pump testing, in particular to a water pump lift testing device and a water pump lift testing method.
Background
The cooling fan is a class of electric fans, and has a better cooling effect compared with a common fan. It utilizes the water pump to take out water in the water tank, sprays on wet curtain, promotes moisture evaporation cooling under the air flow. However, in the long-term use process, because the water quality hardness of part of the areas is high, scale is easily formed and hardened in the cavity of the water pump, so that the lift of the water pump is reduced, and the water cannot be pumped out. Because water pump aperture, lift, the flow that the thermantidote used are all less, are difficult to test through differential pressure sensor. At present, the scale is adopted for detection, but the method can cause the condition of inaccurate test result due to the change of the water level, so that the labor input is large and the detection efficiency is low.
Disclosure of Invention
The invention aims to solve the problem that the water pump lift test result is inaccurate due to the water level change in the existing scale detection technology.
The technical scheme adopted by the invention is as follows:
the invention provides a water pump lift testing device, which comprises: the water tank for placing the water pump to be tested is used for measuring the lift of the water pump to be tested and a water level height gauge arranged perpendicular to the liquid level of the water tank, the water supply pump for supplying water to the water tank and the switch valve for controlling the water discharge of the water tank are arranged in the water tank, the liquid level detector for sending out a water level electric signal corresponding to the water level change is arranged in the water tank, and the controller for keeping the water level unchanged by the water supply pump and the switch valve is controlled according to the comparison result of the water level electric signal and a preset water level signal.
Further, when the water level electric signal is lower than the preset water level signal, the controller controls the water supply pump to supply water, and when the water level electric signal is higher than the preset water level signal, the controller controls the switch valve to drain water.
Furthermore, the preset water level signal is set according to the information of the water pump to be detected.
In one embodiment, the liquid level detector is a liquid level transmitter installed at the bottom of the inner side of the water tank, and the water level electric signal is a water pressure signal detected by the liquid level transmitter.
Further, the water level height gauge is arranged in an inverted mode.
Further, the lateral wall or the top of water tank communicate the inlet tube, the bottom intercommunication outlet pipe of water tank, the water supply pump is installed on the inlet tube, the ooff valve is installed on the outlet pipe.
In one embodiment, the water pump to be tested is a submersible pump.
In one embodiment, the switching valve is a solenoid valve.
The invention also provides a water pump lift testing method, which uses the water pump lift testing device and comprises the following steps: presetting a water level signal according to the information of the water pump to be detected, and adjusting the height of the water level in the water tank to a detection height corresponding to the water pump to be detected; and (4) starting the water pump to be detected below the water surface, and judging whether the lift of the water pump to be detected reaches the standard or not.
Further, when the water level height gauge is arranged in an inverted mode, the water outlet of the water pump is fixed to the 0 scale mark of the water level height gauge.
Compared with the prior art, the invention can keep the water level at the preset height by automatically adjusting the water level of the water tank, effectively solve the problem of inaccurate detection result caused by water level change in the test process and greatly reduce the labor intensity of workers. And can realize that a plurality of water pumps detect simultaneously, promote water pump lift detection efficiency greatly. And the preset water level signal can be changed to test the pump lifts of different styles.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.
FIG. 1 is a view of the overall construction apparatus of the present invention;
1. a water tank; 1.1, a water inlet pipe; 1.2, a water supply pump; 1.3, discharging a water pipe; 1.4, an electromagnetic valve; 2. a liquid level transmitter; 3. a controller; 4. water level height chi.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the present invention provides a water pump lift testing apparatus, including: water tank 1, water level height chi 4, water supply pump 1.2, ooff valve, liquid level detector, controller 3. Water tank 1 is used for placing the water pump that awaits measuring, and water supply pump 1.2 supplies water for the water tank, and the ooff valve drainage of switch valve control water tank, and the level of water transducer detects water level change in the water tank and sends the water level signal of telecommunication, and controller 3 controls water supply pump 1.2 according to the water level signal of telecommunication and the contrast result of predetermineeing the water level signal and supplies water and the ooff valve drainage, makes the water level maintenance in the water tank correspond the detection height of the water pump that awaits measuring. Because the lift of the water pump to be tested is the height of the water outlet to the liquid level, if the water level changes, the lift measurement is inaccurate, and the measuring process of the submersible pump is simplified through automatically maintaining the height of the water level in the application, so that the detection efficiency is effectively improved, and the measurement can be carried out by corresponding to a plurality of submersible pumps simultaneously.
In the specific embodiment, the water tank 1 is a cuboid without a cover, and one side surface of the water tank 1 is provided with a Z-shaped water inlet pipe 1.1. One water pipe connector of the Z-shaped water inlet pipe 1.1 is communicated with the upper part of the side surface and is close to one side of the uncovered opening of the water tank. Another water receiving mouth of the inlet tube 1.1 of the Z shape is introduced to one side close to the ground through the design of the Z shape, and a water supply pump 1.2 is installed at the water receiving mouth at the same time. The opposite design of inlet tube 1.1 installation face has outlet pipe 1.3, is located the side below, is close to the water tank bottom, and a ooff valve has been installed to outlet pipe 1.3's delivery port department, and the ooff valve specifically can be through controller control switch's solenoid valve 1.4 to the water injection speed of water supply pump 1.2 is greater than the drainage speed of solenoid valve 1.4.
The liquid level detector specifically adopts liquid level transmitter 2, can also adopt other liquid level detection device, and liquid level transmitter 2 installs in the inboard bottom of water tank 1, can detect water pressure signal in the water tank to convert water pressure signal to the water level signal of telecommunication that controller 3 can discern and feed back to controller 3.
Controller 3 is connected with level transmitter 2 through the signal line, is connected with water supply pump 1.2 and solenoid valve 1.4 respectively through the control line, need set up different water level signal of predetermineeing in controller 3 according to the detection requirement of different water pumps before the test lift. The controller 3 can compare the water level electric signal fed back by the liquid level transmitter 2 with a preset water level signal, when the water level electric signal exceeds the preset water level signal, the water level in the water tank is higher than the set water level at the moment, and the controller 3 transmits a command through a control line to control the electromagnetic valve 1.4 to discharge the excessive water in the water tank; when the water level electric signal is lower than the preset water level signal, the water level in the water tank is lower than the set water level at the moment, and the controller 3 transmits an instruction to control the water supply pump 1.2 to inject water into the water tank through a control line. When the liquid level transmitter 2 detects that the water level in the water tank reaches the detection requirement, namely when the water level electric signal is consistent with the preset water level signal, the controller 3 closes to stop draining or controls the water supply pump 1.2 to close to stop water injection through the control electromagnetic valve 1.4.
The range of the water level height gauge 4 is 1000 mm, the water level height gauge is provided with 0 scale mark (namely 0 mm), the water level height gauge is inversely arranged on the side surface of the water tank and is vertical to the water surface, the maximum scale is positioned below the water surface or is level with the water surface, and the 0 scale mark is positioned above the water surface.
The invention also provides a water pump lift testing method, which uses the water pump lift testing device and comprises the following steps: presetting a water level signal according to the information of the water pump to be detected, placing the water pump to be detected in the water tank 1, preferably at a position below a scale of a detection height corresponding to the water level height gauge 4, and automatically adjusting the water level height in the water tank to the detection height corresponding to the water pump to be detected by the controller according to the information of the water pump to be detected; and then starting the water pump to be detected below the water surface, and judging whether the lift of the water pump to be detected reaches the standard or not.
The concrete test process of the pump lift is as follows:
setting a preset water level signal for the controller 3 according to information such as the model, specification and power of the water pump to be detected; and then the water pump to be measured is placed below the water surface of the water tank, and the water outlet of the water pump is fixed at the 0-scale mark of the water level height gauge 4. And then the water surface height is adjusted by controlling the water supply pump 1.2 to inject water or controlling the electromagnetic valve 1.4 to discharge water, so that the water surface height is adjusted to the detection height of the water pump to be detected, and the water pump to be detected is covered. After the adjustment is finished, the water pump to be measured is electrified to carry out the lift test, and whether water flows out from the water outlet fixed at the 0 scale mark of the water level height gauge is directly observed. If yes, the lift of the water pump meets the requirement; if not, the lift of the water pump does not meet the requirement. Meanwhile, in the process of detecting the power-on of the water pump to be detected, the liquid level transmitter 2 detects the water level change in the water tank in real time and transmits a feedback water level electric signal, and accordingly the controller 3 receives the water level electric signal in time to control the water supply pump 1.2 to inject water or control the electromagnetic valve 1.4 to drain water, and the water level in the water tank is guaranteed to be consistent with the preset water level.
Further, the pump lift in example 1 was specifically tested. Firstly, according to the information of the water pump to be detected, the lift required by detection is regulated to be 600mm, and then a preset water level signal set in the controller 3 is 600mm; then, the water pump to be measured is placed in the water tank, and the water outlet of the water pump is fixed at the 0-scale mark of the water level height gauge 4; the liquid level transmitter 2 detects whether the height of the water level in the water tank is 600mm or not, if the height of the water level exceeds 600mm, the controller 3 controls the electromagnetic valve 1.4 to drain, and if the height of the water level is lower than 600mm, the controller 3 controls the water supply water pump 1.2 to inject water until the height of the water level is 600mm. Because the water level height gauge 4 is installed upside down on the side of the water tank and is perpendicular to the water level. The water level at this time is just flush with the 600mm scale on the water level height gauge 4. And at the moment, the water pump to be measured is ensured to be positioned below the water surface, and if not, the position of the water pump to be measured is properly adjusted to be positioned below the water surface. After the position of the water pump to be measured is adjusted, the height of the water level in the water tank is larger than 600mm. At this time, the controller adjusts the water level to 600mm again according to the above steps. And then the water pump to be detected is electrified and detected, the water pump to be detected can pump out the water in the water tank, and the water level is lower than 600mm. At the moment, the controller 3 simultaneously controls the water supply pump 1.2 to inject water, and the water level is ensured to be always kept at 600mm when the water pump to be tested is electrified and tested. After the water pump to be detected is electrified and detected, whether water flows out of a water outlet fixed at the 0 scale mark of the water level height gauge is directly observed. If yes, the lift of the water pump meets the requirement; if not, the lift of the water pump does not meet the requirement.
In addition, the water pump lift testing arrangement in embodiment 1 can detect 4 with the style water pumps simultaneously, improves detection efficiency. Meanwhile, the water pump lifts of different styles can be tested by setting different preset water level signals for the controller 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A water pump head testing arrangement, includes: place the water tank of the water pump that awaits measuring for measure the water level height chi that the water pump lift that awaits measuring and perpendicular water tank liquid level set up, its characterized in that still includes: the water level detection device comprises a water supply pump for supplying water to the water tank, a switch valve for controlling water discharge of the water tank, a liquid level detector which is arranged in the water tank and sends a water level electric signal corresponding to water level change, and a controller which controls the water supply pump and the switch valve according to a comparison result of the water level electric signal and a preset water level signal to maintain the water level at a detection height.
2. The pump head testing device according to claim 1, wherein the controller controls the water supply pump to supply water when the water level electric signal is lower than a preset water level signal, and controls the on-off valve to drain water when the water level electric signal is higher than the preset water level signal.
3. The pump head testing device according to claim 1, wherein the predetermined water level signal is set according to information of the pump to be tested.
4. The pump head testing device according to claim 1, wherein the liquid level detector is a liquid level transmitter installed at the bottom of the inner side of the water tank, and the water level electrical signal is a water pressure signal detected by the liquid level transmitter.
5. The pump head testing device of claim 1, wherein the water level height gauge is disposed upside down.
6. The pump head testing device of claim 1, wherein the side wall or the top of the water tank is communicated with a water inlet pipe, the bottom of the water tank is communicated with a water outlet pipe, the water supply pump is installed on the water inlet pipe, and the switch valve is installed on the water outlet pipe.
7. The pump head testing apparatus of claim 1, wherein the pump under test is a submersible pump.
8. The pump head testing device of claim 1, wherein the switch valve is a solenoid valve.
9. A water pump head testing method, characterized in that the water pump head testing device of any one of claims 1 to 8 is used, comprising the steps of: presetting a water level signal according to the information of the water pump to be detected, and adjusting the height of the water level in the water tank to a detection height corresponding to the water pump to be detected; and (4) starting the water pump to be detected below the water surface, and judging whether the lift of the water pump to be detected reaches the standard or not.
10. The method for testing the pump head of claim 9, wherein when the water level height gauge is placed upside down, the water outlet of the pump is fixed on the 0-scale mark of the water level height gauge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110501543.1A CN113175437B (en) | 2021-05-08 | 2021-05-08 | Water pump lift testing device and water pump lift testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110501543.1A CN113175437B (en) | 2021-05-08 | 2021-05-08 | Water pump lift testing device and water pump lift testing method |
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| CN113175437A CN113175437A (en) | 2021-07-27 |
| CN113175437B true CN113175437B (en) | 2022-11-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102913463B (en) * | 2012-05-09 | 2014-12-17 | 江苏大学 | Self-priming height test bed for self-priming pump with high priming travel |
| CN204175578U (en) * | 2014-10-23 | 2015-02-25 | 格力电器（武汉）有限公司 | Water pump detection equipment |
| CN104454491B (en) * | 2014-10-29 | 2017-01-25 | 中国水利水电科学研究院 | Experimental method and experimental platform for adjustable high-lift water hydraulic ram pump |
| CN110905795B (en) * | 2019-11-14 | 2022-04-19 | 中国航发西安动力控制科技有限公司 | Test system of micro-flow small-load water pump |
| CN212429168U (en) * | 2020-05-06 | 2021-01-29 | 科力尔电机集团股份有限公司 | Water pump lift flow testing device |
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