Water pump testing device

Abstract

The utility model provides a water pump testing device, and relates to the technical field of water pump performance, and the water pump testing device comprises a control unit, a liquid inlet connecting assembly, a liquid outlet connecting assembly, a pressure adjusting assembly, a flow detection assembly, a flow adjusting assembly and a water inlet and outlet assembly. According to the water pump testing device, through cooperative use of the flow detection assembly and the flow adjusting assembly, the flow detection range in the loop can cover the set flow value of the to-be-tested water pump, the accuracy of flow detection is ensured, meanwhile, the flow of the whole loop is adjusted by opening the multiple flow adjusting pieces, and the testing efficiency is improved. Therefore, the flow value detected by the flow detection piece can be the same as the set flow value, the accuracy of flow adjustment of the whole loop is ensured, the water pump to be detected operates under the flow data, accurate operation data is obtained, and the accuracy of performance detection of the water pump is ensured.

Description

Technical Field

[0001] This application relates to the technical field of water pump performance, and particularly to a water pump testing device. Background Art

[0002] A water pump testing device is mainly a software and hardware device for conducting factory tests and type tests on water pumps, which can be divided into two categories: a closed-loop test device and an open test device.

[0003] Existing closed-loop test devices include a control unit, an inlet pipeline, an outlet pipeline, and a pressure stabilizing pipeline; the pressure stabilizing pipeline is located between the inlet pipeline and the outlet pipeline; a pressure stabilizing tank and a cavitation tank are provided on the pressure stabilizing pipeline for adjusting the air pressure in the entire loop; on the inlet pipeline and the outlet pipeline, pressure sensors, flow sensors, control valves, etc. are provided as required. During the test, the inlet end and the outlet end of the water pump to be tested are respectively connected and communicated with the inlet pipeline and the outlet pipeline to form a closed loop; test water with a preset pressure is introduced into the closed loop; the motor of the water pump is started, and the water pump starts to reciprocate and circulate the test water in the closed loop, and the performance data of the water pump is detected through the sensors on the closed loop.

[0004] For the above-mentioned water pump testing device, the debugging of the flow rate in the entire loop is achieved by controlling the regulating valve on the loop. However, during the testing process of water pumps with a large flow rate, due to the large diameter of the loop pipeline, the accuracy of the regulating valve adjustment is poor, resulting in the flow rate value in the closed loop not being able to be adjusted to the accurate target value, which affects the accuracy of the performance data of the water pump to be tested. Utility Model Content

[0005] This application provides a water pump testing device to solve the problem that the flow rate adjustment accuracy in the loop of the current water pump testing device is insufficient, affecting the accuracy of the performance data of the water pump to be tested.

[0006] This application provides a water pump testing device, including a control unit, a liquid inlet connection component, a liquid outlet connection component, a pressure adjustment component, a flow detection component, a flow adjustment component, and an inlet and outlet water component.

[0007] The liquid inlet connection component is used to connect the liquid inlet end of the water pump to be detected, and the liquid outlet connection component is used to connect the liquid outlet end of the water pump to be detected.

[0008] The inlet and outlet water component is used to supply liquid to the water pump to be detected and receive the liquid output by the water pump to be detected.

[0009] The pressure adjustment component is used to adjust the pressure of the liquid entering the water pump to be detected.

[0010] The flow detection component includes multiple flow detection elements, and the flow detection ranges of each flow detection element are different. Each flow detection element is used to detect the flow rate value of the water pump to be detected during operation.

[0011] The flow rate regulating assembly includes a plurality of flow rate regulating members, the flow rate regulating ranges of the respective flow rate regulating members are different, and each flow rate regulating member is enabled to regulate the flow rate of the liquid flowing through the water pump to be detected;

[0012] Each flow rate detecting member, the water pump to be detected, and each flow rate detecting member are electrically connected to the control unit;

[0013] The control unit controls the enabling of the flow rate detecting member corresponding to the set flow rate value according to the set flow rate value of the water pump to be detected, and the control unit controls the enabling of at least one flow rate regulating member according to the enabled flow rate detecting member, so that the flow rate value detected by the enabled flow rate detecting member is the same as the set flow rate value.

[0014] The water pump testing device of the present application, through the combined use of the flow rate detecting assembly and the flow rate regulating assembly, can make the flow rate detection range in the loop cover the set flow rate value of the water pump to be detected, ensuring the accuracy of flow rate detection. At the same time, by opening a plurality of flow rate regulating members to adjust the flow rate of the entire loop, the flow rate value detected by the flow rate detecting member can be the same as the set flow rate value, ensuring the accuracy of the flow rate adjustment of the entire loop, so that the water pump to be detected operates under this flow rate data to obtain accurate operation data and ensure the accuracy of the water pump performance detection.

[0015] In a possible implementation manner, each flow rate regulating member includes an adjusting pipe, the pipe diameters of the respective adjusting pipes are different, and each adjusting pipe communicates with the water pump to be detected;

[0016] A regulating valve is provided on each adjusting pipe, and each regulating valve is electrically connected to the control unit.

[0017] In a possible implementation manner, the flow rate regulating assembly further includes a first diversion main pipe and a second diversion main pipe, one end of each adjusting pipe is connected to the first diversion main pipe, and the other end of each adjusting pipe is connected to the second diversion main pipe;

[0018] The first diversion main pipe is connected to the liquid outlet connection assembly, the second diversion main pipe is connected to a pressure stabilizing tank, and the pressure stabilizing tank is connected to the flow rate detecting assembly.

[0019] In a possible implementation manner, each flow rate detecting member includes a connecting pipe, and each connecting pipe communicates with the water pump to be detected;

[0020] A flow rate detector and a control valve are provided on each connecting pipe, the flow rate detection ranges of the respective flow rate detectors are different, and each flow rate detector and each control valve are electrically connected to the control unit.

[0021] In a possible implementation manner, the flow rate detecting assembly further includes a first connection main pipe and a second connection main pipe, one end of each connecting pipe is connected to the first connection main pipe, and the other end of each connecting pipe is connected to the second connection main pipe;

[0022] The first connecting main pipe is connected to the pressure-stabilizing tank, and the second connecting main pipe is connected to the pressure regulating component.

[0023] In a possible implementation, the pressure regulating assembly includes a cavitation tank, a gas-liquid separation tank, a compressor and at least one vacuum pump.

[0024] The cavitation tank is connected to the second connecting main pipe and the liquid inlet connecting assembly respectively, the cavitation tank is connected to the gas-liquid separation tank through a pneumatic pipeline, the compressor is connected to the pneumatic pipeline, and the vacuum pump is connected to the gas-liquid separation tank;

[0025] The compressor and the vacuum pump are both electrically connected to the control unit.

[0026] In a possible implementation, the liquid inlet connection assembly includes a water inlet main pipe and a plurality of water inlet connecting pipes with different pipe diameters.

[0027] The water inlet main pipe is connected to the cavitation tank, each water inlet pipe is connected to the water inlet main pipe, and each water inlet pipe is connected to the feed end of the water pump to be tested.

[0028] Each water inlet pipe is provided with a water inlet control valve and an inlet pressure sensor, and each water inlet control valve and each inlet pressure sensor are electrically connected to the control unit.

[0029] In a possible implementation, the liquid outlet connection assembly includes a water outlet main pipe and a plurality of water outlet connecting pipes with different pipe diameters.

[0030] The water outlet main pipe is connected to the first diversion main pipe, each water outlet pipe is connected to the water outlet main pipe, and each water outlet pipe is connected to the discharge end of the water pump to be tested.

[0031] Each water outlet pipe is provided with a water outlet control valve and an outlet pressure sensor, and each water outlet control valve and each outlet pressure sensor is electrically connected to the control unit.

[0032] In one possible implementation, the water inlet and outlet components include an inlet pipe, a discharge pipe, a water replenishment pump and a drainage pump. The water replenishment pump is located on the inlet pipe, and the drainage pump is located on the drainage pipe. The inlet pipe and the drainage pipe are both connected to the water pump to be tested, and the water replenishment pump and the drainage pump are both electrically connected to the control unit.

[0033] In a possible implementation, the water inlet and outlet assembly further includes a water storage tank, which is connected to the liquid discharge pipe, and the water storage tank is connected to the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] Figure 1 Schematic diagram of the system structure of the water pump testing device provided in the embodiment of the present applicationFigure 1 ;

[0036] Figure 2 Structural schematic of the water pump testing device provided by the embodiment of the present application Figure 1 。

[0037] Reference numerals:

[0038] 100 - Liquid inlet connection assembly; 110 - Main water inlet pipe; 120 - Water inlet connecting pipe; 130 - Water inlet control valve; 140 - Inlet pressure sensor;

[0039] 200 - Water pump;

[0040] 300 - Liquid outlet connection assembly; 310 - Main water outlet pipe; 320 - Water outlet connecting pipe; 330 - Water outlet control valve; 340 - Outlet pressure sensor;

[0041] 400 - Flow regulation assembly; 410 - First diversion main pipe; 420 - Second diversion main pipe; 430 - Regulation pipe; 440 - Regulation valve;

[0042] 500 - Pressure stabilizing tank;

[0043] 600 - Water inlet and outlet assembly; 610 - Auxiliary connecting pipe; 620 - Drainage pump; 630 - Drainage pipe; 640 - Water storage tank; 650 - Liquid inlet pipe; 660 - Make - up water pump;

[0044] 700 - Test loop;

[0045] 800 - Flow detection assembly; 810 - Second connection main pipe; 820 - First connection main pipe; 830 - Connecting pipe; 840 - Flow detector; 850 - Control valve;

[0046] 900 - Pressure regulation assembly; 910 - Cavitation tank; 920 - Pneumatic pipeline; 930 - Compressor; 940 - Vacuum pump; 950 - Gas - liquid separation tank.

[0047] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0048] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] In the specification and claims of the present application and the above-mentioned accompanying drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0050] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0051] The closed-loop test device in the prior art includes a control unit and a connecting pipe. The connecting pipe is connected with a water inlet pipe, a water outlet pipe, a water guide pipe and a pressure stabilizing tank. A regulating valve, a switch valve, a flow meter and a pressure detector, etc. are provided on the connecting pipe. The regulating valve, the switch valve, the flow meter, the pressure detector and the water pump to be detected are all electrically connected to the control unit.

[0052] During use, the water inlet end and the water outlet end of the water pump to be detected are respectively connected to the water inlet pipe and the water outlet pipe to form a closed test loop; open the valves on the connecting pipe, and use the water guide pipe to introduce water into the closed loop to ensure that the entire closed test loop is filled with water, and then close the valve on the water guide pipe.

[0053] The control unit controls the water pump to start. When the water pump starts, the water in the test loop is circulated. At this time, the flow meter on the test loop detects a flow signal, and the flow signal is fed back to the control unit. The control unit controls the opening and closing of the regulating valve based on this flow signal to adjust the flow of water in the entire test loop so that the flow signal detected by the flow meter is the same as the preset flow rate (set value or factory value) of the water pump to be detected. So that the water pump runs for a certain period of time under this flow data to verify the stability of the water pump and test some of the performance of the water pump.

[0054] In the prior art, due to the different models of the water pumps to be detected, different models of water pumps have different flow ranges during operation. However, a single flow detection pipeline cannot cover water pumps with different flow ranges. At the same time, for water pumps with a large flow rate, the regulating valve on a single pipeline cannot accurately regulate the flow rate in the entire test loop, resulting in the problem that the existing closed-loop water pump test device cannot adjust the flow rate value to the accurate target value, affecting the accuracy of the performance data of the water pump to be detected.

[0055] To solve the above problems, the present application provides a flow detection component and a flow regulation component. By using the flow detection component, water pumps with different flow rates can be adapted for testing different water pumps. At the same time, by using the flow regulation component, the flow regulation method in the test loop can be refined to regulate the flow rate in the test loop so that the flow rate in the entire test loop is the same as the preset value of the water pump, so that the water pump can be detected at this flow rate to obtain accurate detection data of the water pump, facilitating the verification or improvement of the water pump performance.

[0056] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0057] Refer to Figure 1 、 Figure 2 As shown, a water pump test device includes a control unit, a liquid inlet connection component 100, a liquid outlet connection component 300, a pressure regulation component 900, a flow detection component 800, a flow regulation component 400, and a water inlet and outlet component 600. The liquid inlet connection component 100 is used to connect the liquid inlet end of the water pump 200 to be detected, and the liquid outlet connection component 300 is used to connect the liquid outlet end of the water pump 200 to be detected; the water inlet and outlet component 600 is used to supply liquid to the water pump 200 to be detected and receive the liquid output by the water pump 200 to be detected; the pressure regulation component 900 is used to regulate the liquid pressure entering the water pump 200 to be detected; the flow detection component 800 includes a plurality of flow detection elements, and the flow detection ranges of the flow detection elements are different. Each flow detection element is used to detect the flow rate value of the water pump 200 to be detected during operation; the flow regulation component 400 includes a plurality of flow regulation elements, and the flow regulation ranges of the flow regulation elements are different. Each flow regulation element is enabled to regulate the liquid flow rate flowing through the water pump 200 to be detected; each flow detection element, the water pump 200 to be detected, and each flow detection element are electrically connected to the control unit; the control unit enables the flow detection element corresponding to the set flow rate value according to the set flow rate value of the water pump 200 to be detected, and the control unit enables at least one flow regulation element according to the enabled flow detection element so that the flow rate value detected by the enabled flow detection element is the same as the set flow rate value.

[0058] It can be understood that the water pump 200 test device of the present application is a closed test device, which means that the liquid inlet connection assembly 100, the liquid outlet connection assembly 300, the pressure regulating assembly 900, the flow rate detection assembly 800, and the flow rate regulating assembly 400 can be interconnected through pipelines. After the liquid inlet end and the liquid outlet end of the water pump 200 to be tested are respectively connected to the liquid inlet connection assembly 100 and the liquid outlet connection assembly 300, the liquid inlet connection assembly 100, the water pump 200 to be tested, the liquid outlet connection assembly 300, the pressure regulating assembly 900, the flow rate detection assembly 800, and the flow rate regulating assembly 400 can form a closed test loop 700 through each pipeline.

[0059] In the present application, the flow rate detection assembly 800 includes a plurality of flow rate detection elements, and the flow rate detection elements are used to detect the flow rate in the pipeline. The flow rate detection elements may include a flow rate detector 840, such as existing differential pressure flow meters, volumetric flow meters, velocity flow meters, mass flow meters, electromagnetic flow meters, ultrasonic flow meters, etc., for detecting the flow rate in the entire test loop 700. Since the flow rate detection ranges of the respective flow rate detection elements are different, it indicates that the respective flow rate detection elements can be used to detect water pumps 200 with different flow rate ranges, and can accurately detect the flow rate values of different water pumps 200, so that the test device of the present application can be adapted to different water pumps 200 to be tested.

[0060] At the same time, in the present application, the flow rate regulating assembly 400 includes a plurality of flow rate regulating elements, and the flow rate regulating ranges of the respective flow rate regulating elements are different. It can be understood that the flow rate regulating element is an electric control valve 440, and the opening and closing rotation angles of the respective electric control valves 440 are different. Then, when the respective flow rate regulating elements are enabled, they can be used to regulate the liquid flow rate flowing through the water pump 200 to be tested, that is, to regulate the flow rate in the entire test loop 700, so as to control the respective flow rate regulating elements to make the flow rate in the entire test loop 700 the same as the preset value of the water pump 200 to be tested.

[0061] Among them, the control unit can adopt a single-chip microcomputer or a PLC controller in the prior art to achieve the above purpose.

[0062] When the water pump 200 test device of the present application is in use:

[0063] First, connect the water pump 200 to be tested to the liquid inlet connection assembly 100 and the liquid outlet connection assembly 300.

[0064] The control unit opens each valve in the test loop 700. Among them, the activation of the flow rate detection element is determined according to the flow rate of the water pump 200 to be tested. For example, if the flow rate of the water pump 200 is assumed to be 40 m3 / h, the detection range of the activated flow rate detection element needs to cover 40 m3 / h.

[0065] After filling the test loop 700 with the test liquid (water) using the water inlet and outlet assembly 600, the control unit controls the water inlet and outlet assembly 600 to stop working.

[0066] The control unit controls the pressure regulating assembly 900 to adjust the inlet pressure of the water pump 200 to be tested to ensure that the inlet pressure of the water pump 200 to be tested meets the requirements.

[0067] The control unit controls the water pump 200 to be tested to start. The water pump 200 operates to drive the water circulation in the test loop 700. At this time, the enabled flow detection component will detect the flow value in the test loop 700 (which can be equivalent to the flow data of the operation of the water pump 200). The control unit controls at least one flow regulating component to be enabled according to the detected flow value so that the flow value detected by the enabled flow detection component is the same as the set flow value, completing the preliminary debugging of the test device.

[0068] Keep the water pump 200 running in this state for a specific time so that the control unit can collect other data of the water pump 200 (such as the change value of the inlet and outlet pressure, etc.).

[0069] The water pump 200 test device of the present application, through the combined use of the flow detection assembly 800 and the flow regulating assembly 400, can make the flow detection range in the loop cover the set flow value of the water pump 200 to be tested, ensuring the accuracy of flow detection. At the same time, by opening multiple flow regulating components to adjust the flow of the entire loop, the flow value detected by the flow detection component can be the same as the set flow value, ensuring the accuracy of the flow adjustment of the entire loop, so that the water pump 200 to be tested operates under this flow data to obtain accurate operation data and ensure the accuracy of the performance detection of the water pump 200.

[0070] In a possible implementation manner, each flow regulating component includes an adjusting pipe 430, the diameters of the adjusting pipes 430 are different from each other, and each adjusting pipe 430 communicates with the water pump 200 to be tested; a regulating valve 440 is provided on each adjusting pipe 430, and each regulating valve 440 is electrically connected to the control unit.

[0071] It can be understood that for pipes with different diameters, at the same flow rate, the amount of fluid passing through per unit time will be different. Therefore, by controlling the flow area of each pipe, the total amount of fluid flowing through pipes with different diameters can be controlled. For this purpose, each flow regulating member of the present application includes a regulating pipe 430, the diameters of the regulating pipes 430 are different from each other, each regulating pipe 430 communicates with the water pump 200 to be detected, and a regulating valve 440 is provided on each regulating pipe 430, and each regulating valve 440 is electrically connected to the control unit. Then, in use, by controlling the regulating valves 440 on each regulating pipe 430, the total amount of fluid flowing through each regulating pipe 430 per unit time can be controlled, which is equivalent to regulating the total amount of fluid in the entire test loop 700. Then, when the fluid passes through the flow detection member, it will have different flow rate data, so as to realize that by adjusting each flow regulating member, the flow rate value (the value detected by the flow detection member) in the test loop 700 can be the same as the preset value of the water pump 200 to be detected.

[0072] Specifically, as shown in the figure, the present application provides 6 flow regulating members, and the diameters of the 6 regulating pipes 430 corresponding to the 6 flow regulating members increase in sequence. The inner diameters of the regulating pipes 430 from top to bottom are 32 mm, 50 mm, 100 mm, 200 mm, 300 mm, and 400 mm respectively. The regulating valves 440 on each regulating pipe 430 are electric regulating valves 440 corresponding to each pipe diameter. When introducing the test liquid (water) into the entire test loop 700, each regulating valve 440 is opened (each regulating pipe 430 is conducting), but the opening angles of each regulating valve 440 are not fully opened. The purpose is to facilitate each regulating valve 440 to "open wider" or "open smaller" according to the flow rate data detected by the flow detection member, so as to increase or decrease the flow rate in the test loop 700, so that the detected flow rate data can be the same as the preset data of the water pump 200.

[0073] The flow regulating assembly 400 of the present application adopts the control form of "large valve plus small valve" to achieve more accurate regulation in the entire test loop 700, so that the test value of the flow detection member can be the same as the preset value of the water pump 200, so as to make the data of the water pump 200 detected more accurate and facilitate the production and research and development of the water pump 200.

[0074] In a possible implementation manner, the flow regulating assembly 400 further includes a first diversion main pipe 410 and a second diversion main pipe 420. One end of each regulating pipe 430 is connected to the first diversion main pipe 410, and the other end of each regulating pipe 430 is connected to the second diversion main pipe 420; the first diversion main pipe 410 is connected to the liquid outlet connection assembly 300, the second diversion main pipe 420 is connected to a pressure stabilizing tank 500, and the pressure stabilizing tank 500 is connected to the flow detection assembly 800.

[0075] Since multiple regulating pipes 430 are provided in this application, and each regulating pipe 430 needs to communicate with the water pump 200 to be detected, the multiple regulating pipes 430 need to be "connected in parallel". To facilitate the connection of each regulating pipe 430, the two ends of each regulating pipe 430 need to be gathered. For this purpose, the flow rate regulating assembly 400 of this application further includes a first diversion main pipe 410 and a second diversion main pipe 420. One end of each regulating pipe 430 is connected to the first diversion main pipe 410, and the other end of each regulating pipe 430 is connected to the second diversion main pipe 420. The first diversion main pipe 410 and the second diversion main pipe 420 are used to facilitate the setting of the entire flow rate regulating assembly 400 in the test loop 700, so that the flow rate regulating assembly 400 can be connected to the liquid outlet connection assembly 300 through the first diversion main pipe 410; at the same time, the flow rate regulating assembly 400 can communicate with the flow rate detection member conveniently through the second diversion main pipe 420.

[0076] Among them, the pressure stabilizing tank 500 maintains the stability of the pressure in the entire test loop 700, protects the water pump 200, and ensures the accuracy of the test. Utilizing the incompressibility of water and the compressibility of gas, it plays a buffering and regulating role when the pressure in the test loop 700 changes.

[0077] In a possible implementation manner, each flow rate detection member includes a connecting pipe 830, and each connecting pipe 830 communicates with the water pump 200 to be detected; a flow rate detector 840 and a control valve 850 are provided on each connecting pipe 830. The flow rate detection ranges of the flow rate detectors 840 are different, and each flow rate detector 840 and each control valve 850 are electrically connected to the control unit.

[0078] It can be understood that the theoretical ranges of the flow rate detectors 840 matched by pipes with different diameters are also different. For this reason, in order to enable the test device of this application to test water pumps 200 with different flow rate ranges, this application provides multiple connecting pipes 830 with different diameters, and a control valve 850 and a flow rate detector 840 are provided on each connecting pipe 830.

[0079] Since the detection ranges of the flow rate detectors 840 on the connecting pipes 830 are different, assuming that the preset flow rate value of the water pump 200 to be detected is 40m 3 / h, the detection range of the flow rate detector 840 on the conducting connecting pipe 830 needs to cover 40m 3 / h. During use, when forming the test loop 700, the control unit controls the opening of the control valve 850 on the corresponding connecting pipe 830 according to the preset flow rate value of the water pump 200 to be detected, forms the test loop 700 with other components, closes the control valves 850 on the other connecting pipes 830, and then introduces a test liquid (water) into the entire test loop 700 for subsequent operations.

[0080] Specifically, such as Figure 1As shown in the figure, the present application is provided with 6 flow detectors. The diameters of the 6 connecting pipes 830 corresponding to the 6 flow detectors increase in sequence. The inner diameters of the connecting pipes 830 from top to bottom are 32mm, 50mm, 100mm, 200mm, 300mm, and 400mm respectively. The control valves 850 on each connecting pipe 830 are electric gate valves corresponding to each pipe diameter. The flow detectors 840 on each connecting pipe 830 are flow detectors 840 corresponding to the detection ranges. For example, for the flow detector 840 on the connecting pipe 830 with a diameter of 32mm, according to different types of the flow detector 840 (such as electromagnetic flowmeter, turbine flowmeter, vortex street flowmeter, etc.), its measurement range is within 2 - 120m 3 / h, etc. Therefore, according to the flow ranges of the water pumps 200 to be detected, corresponding flow detectors 840 can be selected so that the flow detectors 840 on each connecting pipe 830 have different flow detection ranges to adapt to different water pumps 200 to be detected.

[0081] Through multiple connecting pipes 830 with different diameters and the flow detectors 840 with corresponding measurement ranges on the connecting pipes 830, according to the preset flow value of the water pump 200 to be detected, any connecting pipe 830 can be made to conduct through the control unit. The measurement range of the flow detector 840 on the conducting connecting pipe 830 covers the preset flow value of the water pump 200 to be detected, and this flow detector is also used to detect the flow value in the entire test loop 700 (the operating flow value of the water pump 200), so that the detected value of the water pump 200 can be made the same as the preset flow value of the water pump 200 under the action of the flow regulating assembly 400.

[0082] In a possible implementation manner, the flow detection assembly 800 further includes a first connecting main pipe 820 and a second connecting main pipe 810. One end of each connecting pipe 830 is connected to the first connecting main pipe 820, and the other end of each connecting pipe 830 is connected to the second connecting main pipe 810; the first connecting main pipe 820 is connected to the pressure stabilizing tank 500, and the second connecting main pipe 810 is connected to the pressure regulating assembly 900.

[0083] Similarly, the connecting pipes 830 are "connected in parallel", and both ends of each connecting pipe 830 are respectively connected to the same components. To enable each connecting pipe 830 to achieve the above connection method, the flow detection component 800 of the present application further includes a first connecting main pipe 820 and a second connecting main pipe 810. One end of each connecting pipe 830 is connected to the first connecting main pipe 820, and the other end of each connecting pipe 830 is connected to the second connecting main pipe 810. The settings of the first connecting main pipe 820 and the second connecting main pipe 810 facilitate the "parallel connection" of each connecting pipe 830. At the same time, the first connecting main pipe 820 also facilitates the connection between the entire flow detection component 800 and the pressure regulating component 900. The second connecting main pipe 810 facilitates the connection between the entire flow detection component 800 and the pressure stabilizing tank 500 (flow regulating component 400).

[0084] To facilitate the separate liquid drainage (air exhaust) of the first connecting main pipe 820 and the second connecting main pipe 810, open ends communicating with the outside can be respectively provided on the first connecting main pipe 820 and the second connecting main pipe 810, and valves are respectively provided on the first connecting main pipe 820 and the second connecting main pipe 810 so that the first connecting main pipe 820 and / or the second connecting main pipe 810 can drain liquid to the outside.

[0085] In a possible implementation manner, the pressure regulating component 900 includes a cavitation tank 910, a gas-liquid separation tank 950, a compressor 930, and at least one vacuum pump 940. The cavitation tank 910 is respectively connected to the second connecting main pipe 810 and the liquid inlet connecting component 100. The cavitation tank 910 is connected to the gas-liquid separation tank 950 through a pneumatic pipeline 920. The compressor 930 is connected to the pneumatic pipeline 920. The vacuum pump 940 is connected to the gas-liquid separation tank 950. The compressor 930 and the vacuum pump 940 are both electrically connected to the control unit.

[0086] It can be understood that the water pump 200 has a cavitation effect. To avoid the influence of cavitation on other data of the water pump 200 to be detected, it is necessary to exhaust the air in the test loop 700. Therefore, the present application provides a pressure regulating component 900, which includes a cavitation tank 910, a gas-liquid separation tank 950, a compressor 930, and at least one vacuum pump 940. The cavitation tank 910 is respectively connected to the second connecting main pipe 810 and the liquid inlet connecting component 100. The cavitation tank 910 is connected to the gas-liquid separation tank 950 through a pneumatic pipeline 920. The compressor 930 is connected to the pneumatic pipeline 920. The vacuum pump 940 is connected to the gas-liquid separation tank 950. The compressor 930 and the vacuum pump 940 are both electrically connected to the control unit.

[0087] When the water pump 200 to be detected is located on the entire test loop 700, the test loop 700 is filled with water through the water inlet and outlet assembly 600; at this time, the water in the pressure stabilizing tank 500 is full (the top of the pressure stabilizing tank 500 is connected with an external discharge pipe, and there is a valve on the external discharge pipe. When the valve is opened, the pressure at the top of the pressure stabilizing tank 500 is the same as the external air pressure, and when water enters the top of the pressure stabilizing tank 500, the pressure stabilizing tank 500 can be filled with water), and the vacuum pump 940 works to discharge the air in the cavitation tank 910 and the test loop 700 communicated with the cavitation tank 910. The gas-liquid separation tank 950 protects the operation of the vacuum pump 940 to prevent the water in the cavitation tank 910 from entering the vacuum pump 940. The vacuum pump 940 operates to discharge the air in the cavitation tank 910, and through the vacuum pump 940, the water level in the cavitation tank 910 is higher than 80% (by setting a liquid level detector in the cavitation tank 910 to judge the height of the liquid level in the cavitation tank 910, and the liquid level detector is electrically connected to the control unit). At this time, it can be basically ensured that there is no air in the entire test loop 700.

[0088] After the water inlet and outlet assembly 600 stops working, at this time, the compressor 930 can be used to work, and the entire test loop 700 is pressurized again, which can ensure that the liquid inlet end of the water pump 200 to be tested has sufficient pressure. In this way, the influence of cavitation on the flow-head curve of the water pump 200 can be excluded, and thus the true flow-head curve of the water pump 200 can be obtained.

[0089] In a possible implementation manner, the liquid inlet connection assembly 100 includes a water inlet main pipe 110 and a plurality of water inlet connecting pipes 120 with different pipe diameters. The water inlet main pipe 110 is connected to the cavitation tank 910, each water inlet connecting pipe 120 is connected to the water inlet main pipe 110, each water inlet connecting pipe 120 is alternatively connected to the feed end of the water pump 200 to be detected, and each water inlet connecting pipe 120 is provided with a water inlet control valve 130 and an inlet pressure sensor 140. Each water inlet control valve 130 and each inlet pressure sensor 140 are electrically connected to the control unit.

[0090] It can be understood that the diameters of the liquid inlet ends of water pumps 200 in different flow rate ranges are different, and the overall volumes of each water pump 200 are also different. Therefore, in order to enable the test device of the present application to test as many different types of water pumps 200 as possible, the liquid inlet connection assembly 100 of the present application needs to be adapted to the liquid inlet port diameters of different water pumps 200. Therefore, the liquid inlet connection assembly 100 of the present application includes a water inlet main pipe 110 and a plurality of water inlet connecting pipes 120 with different pipe diameters. The water inlet main pipe 110 is connected to the cavitation tank 910, each water inlet connecting pipe 120 is connected to the water inlet main pipe 110, each water inlet connecting pipe 120 is alternatively connected to the feed end of the water pump 200 to be detected, and each water inlet connecting pipe 120 is provided with a water inlet control valve 130 and an inlet pressure sensor 140. Each water inlet control valve 130 and each inlet pressure sensor 140 are electrically connected to the control unit.

[0091] During use, according to the model of the water pump 200 to be detected or the caliber of the liquid inlet end, select a suitable water inlet connecting pipe 120, connect the water inlet connecting pipe 120 to the water pump 200, and open the water inlet control valve 130 on the water inlet connecting pipe 120, while closing the corresponding water inlet control valves 130 on other water inlet connecting pipes 120.

[0092] Specifically, as Figure 1 shown, in this application, four water inlet connecting pipes 120 are provided, and each water inlet connecting pipe 120 is provided with a water inlet control valve 130 and an inlet pressure sensor 140. The diameters of the water inlet connecting pipes 120 from top to bottom are 50mm, 100mm, 300mm, and 600mm in sequence. The water inlet control valves 130 on each water inlet connecting pipe 120 are adapted to each water inlet connecting pipe 120.

[0093] Of course, pressure sensors may not be separately provided on each water inlet connecting pipe 120. A pressure sensor may be provided on the liquid inlet transition pipe between the water inlet connecting pipe 120 and the water pump 200. This pressure sensor is electrically connected to the control unit and can perform the functions of the inlet pressure sensors 140 to check the pressure at the liquid inlet end of the water pump 200.

[0094] Since different water pumps 200 to be detected have different heights, the water pump 200 to be detected can be placed on the test platform. An electric lifting mechanism can be provided below the test platform. The electric lifting mechanism and the test platform can form an existing electric lifting platform to adjust the installation height of the water pump 200 to be detected, facilitating the connection between the water pump 200 and the liquid inlet connection assembly 100 and the liquid outlet connection assembly 300.

[0095] Of course, the electric lifting platform can also be used to adjust the installation position of the liquid inlet connection assembly 100. Specifically, the electric lifting platform is arranged below each water inlet connecting pipe 120, and the position of the liquid outlet end of each water inlet connecting pipe 120 can be finely adjusted up and down under the action of the electric lifting platform. Or, the electric lifting platform is used to ensure that each water inlet connecting pipe 120 can be adapted to the height of the platform where the water pump 200 is installed, so that each water pump 200 installed on the platform can be connected to the corresponding water inlet connecting pipe 120.

[0096] In a possible implementation manner, the liquid outlet connection assembly 300 includes a liquid outlet main pipe 310 and a plurality of liquid outlet connecting pipes 320 with different diameters. The liquid outlet main pipe 310 is connected to the first diversion main pipe 410. Each liquid outlet connecting pipe 320 is connected to the liquid outlet main pipe 310. Each liquid outlet connecting pipe 320 is selectively connected to the discharge end of the water pump 200 to be detected. Each liquid outlet connecting pipe 320 is provided with a liquid outlet control valve 330 and an outlet pressure sensor 340. Each liquid outlet control valve 330 and each outlet pressure sensor 340 are electrically connected to the control unit.

[0097] It can be understood that the outlet diameters of the water pumps 200 with different flow ranges are different, and the overall volumes of the water pumps 200 are also different. Therefore, in order to enable the test device of the present application to test as many different types of water pumps 200 as possible, the outlet connection assembly 300 of the present application needs to be adapted to the outlet diameters of different water pumps 200. For this reason, the outlet connection assembly 300 includes a main outlet pipe 310 and a plurality of outlet connecting pipes 320 with different pipe diameters. The main outlet pipe 310 is connected to the first diversion main pipe 410. Each outlet connecting pipe 320 is connected to the main outlet pipe 310. Each outlet connecting pipe 320 is selectively connected to the discharge end of the water pump 200 to be tested. An outlet control valve 330 and an outlet pressure sensor 340 are provided on each outlet connecting pipe 320. Each outlet control valve 330 and each outlet pressure sensor 340 are electrically connected to the control unit.

[0098] During use, according to the model of the water pump 200 to be tested or the outlet diameter of the water pump 200, a suitable outlet connecting pipe 320 is selected, and the outlet connecting pipe 320 is connected to the water pump 200, and the outlet control valve 330 on the outlet connecting pipe 320 is opened, and the corresponding outlet control valves 330 on the other outlet connecting pipes 320 are closed.

[0099] Specifically, as shown in the figure, four outlet connecting pipes 320 are provided in the present application. An outlet control valve 330 and an outlet pressure sensor 340 are provided on each outlet connecting pipe 320. The pipe diameters of the outlet connecting pipes 320 from top to bottom are 50 mm, 100 mm, 300 mm, and 600 mm in sequence. The outlet control valves 330 on each outlet connecting pipe 320 are adapted to each outlet connecting pipe 320.

[0100] Of course, a pressure sensor may not be separately provided on each outlet connecting pipe 320. A pressure sensor may be provided on the outlet connecting pipe 320 and the liquid outlet transition pipe of the water pump 200. The pressure sensor is electrically connected to the control unit. The pressure sensor can realize the functions of the outlet pressure sensors 340 and is used to check the pressure at the liquid outlet end of the water pump 200.

[0101] In order to detect the rotational speed and / or torque of the water pump 200, after the water pump 200 to be tested is respectively connected to the inlet connection assembly 100 and the outlet connection assembly 300, a rotational speed sensor and a torque meter may be connected to the corresponding components of the water pump 200. The rotational speed sensor and the torque meter are electrically connected to the control unit. The corresponding performance data of the water pump 200 can be detected through the rotational speed sensor and / or the torque meter.

[0102] In a possible implementation, the water inlet and outlet assembly 600 includes a liquid inlet pipe 650, a liquid discharge pipe 630, a make-up water pump 660, and a drain pump 620. The make-up water pump 660 is located on the liquid inlet pipe 650, and the drain pump 620 is located on the liquid discharge pipe 630. Both the liquid inlet pipe 650 and the liquid discharge pipe 630 are connected to the water pump 200 to be tested. The make-up water pump 660 and the drain pump 620 are both electrically connected to the control unit.

[0103] It can be understood that when the liquid inlet connection assembly 100, the water pump 200 to be tested, the liquid outlet connection assembly 300, the pressure regulating assembly 900, the flow rate detecting assembly 800, and the flow rate regulating assembly 400 form a closed test loop 700 through respective pipelines, introducing or discharging the test liquid (water) into or from the test loop 700 can be achieved only by using the same pipelines as those of the test loop 700. By introducing water into or discharging water from the pipelines, the introduction or discharge of the test water in the entire test loop 700 can be realized. Therefore, to enable the pipelines to introduce and discharge water, the water inlet and outlet assembly 600 of the present application includes a liquid inlet pipe 650, a liquid discharge pipe 630, a make-up water pump 660, and a drain pump 620. The make-up water pump 660 is located on the liquid inlet pipe 650, and the drain pump 620 is located on the liquid discharge pipe 630. Both the liquid inlet pipe 650 and the liquid discharge pipe 630 are connected to the water pump 200 to be tested. The make-up water pump 660 and the drain pump 620 are both electrically connected to the control unit.

[0104] The liquid inlet pipe 650 and the liquid discharge pipe 630 are selectively enabled. The liquid inlet pipe 650 can be connected to a municipal water supply pipe, or can be connected to a separate water supply tank or water supply box.

[0105] When the entire test loop 700 needs to be supplied with water, at this time, the control unit controls the make-up water pump 660 on the liquid inlet pipe 650 to start, and introduces the external test liquid (water) into the test loop 700 from the liquid inlet pipe 650 to ensure that the test loop 700 is filled with water according to the preset requirements, and then the control unit controls the make-up water pump 660 to stop. The water pump 200 on the test loop 700 is started, and then each flow regulating member is adjusted so that the water pump 200 operates at a specific flow rate for a specific time to detect the operating data of the water pump 200.

[0106] When the water pump 200 finishes the test, the water pump 200 stops operating, and the control unit controls the drain pump 620 on the liquid discharge pipe 630 to start, and discharges the water in the test loop 700, so that after the water pump 200 is disassembled, the test liquid (water) will not flow out everywhere.

[0107] Of course, to ensure that either the liquid inlet pipe 650 or the liquid discharge pipe 630 is enabled, start valves can also be respectively arranged on the liquid inlet pipe 650 and the liquid discharge pipe 630. The start valves are electrically controlled valves, and each start valve is electrically connected to the control unit. By opening the corresponding start valve, either the liquid inlet pipe 650 or the liquid discharge pipe 630 is conductively connected, and then the corresponding make-up water pump 660 or the drain pump 620 is started.

[0108] To ensure that the detection liquid at the liquid inlet end and the liquid outlet end of the water pump 200 to be detected can be exported as much as possible, an auxiliary connection pipe 610 is connected to the liquid discharge pipe 630 on the feed side of the drain pump 620. The liquid discharge pipe 630 and the auxiliary connection pipe 610 are respectively located at the liquid inlet end and the liquid outlet end of the water pump 200 to be detected. When the liquid discharge pipe 630 needs to discharge the test liquid in the test loop 700, the auxiliary connection pipe 610 will also conduct liquid to accelerate the discharge of the test liquid in the test loop 700. At the same time, the test liquid at the liquid inlet end and the liquid outlet end of the water pump 200 can be exported as much as possible to prevent the test liquid from scattering when the water pump 200 is disassembled.

[0109] In a possible implementation manner, the water inlet and outlet assembly 600 further includes a water storage tank 640. The water storage tank 640 is connected to the liquid discharge pipe 630, and the water storage tank 640 is connected to the liquid inlet pipe 650.

[0110] It can be understood that the test liquid is usually tap water, and tap water can be recycled. Therefore, to recycle the test liquid and reduce the test cost of the test device, the water inlet and outlet assembly 600 of the present application further includes a water storage tank 640. The water storage tank 640 is connected to the liquid discharge pipe 630, and the water storage tank 640 is connected to the liquid inlet pipe 650.

[0111] If the liquid outlet end of the liquid discharge pipe 630 is communicated with the water storage tank 640, the test liquid in the test loop 700 will be introduced into the water storage tank 640 for temporary storage. If the test liquid temporarily stored in the water storage tank 640 can enter the test loop 700 again, a pipe will be arranged at the bottom of the water storage tank 640, and this pipe is communicated with the liquid inlet end of the make-up water pump 660.

[0112] During use, when the next test is carried out, after the water pump 200 to be detected is connected to the liquid inlet connection assembly 100 and the liquid outlet connection assembly 300, the test loop 700 is closed. At this time, the make-up water pump 660 on the liquid inlet pipe 650 is started, and the make-up water pump 660 can introduce the municipal water or other water supply components (such as a water supply tank, etc.) and the water in the water storage tank 640 into the test loop 700 again to realize the recycling of the test liquid and reduce the test cost.

[0113] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0114] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A water pump testing device, characterized in that: It comprises a control unit, a liquid inlet connection component (100), a liquid outlet connection component (300), a pressure regulating component (900), a flow detection component (800), a flow regulating component (400) and a water inlet and outlet component (600). The liquid inlet connection assembly (100) is used to connect to the liquid inlet end of the water pump (200) to be tested, and the liquid outlet connection assembly (300) is used to connect to the liquid outlet end of the water pump (200) to be tested; The water inlet and outlet assembly (600) is used to supply liquid to the water pump to be tested (200) and to receive liquid output by the water pump to be tested (200); The pressure regulating component (900) is used to regulate the pressure of the liquid entering the water pump (200) to be tested; The flow detection component (800) comprises a plurality of flow detection components, each of which has a different flow detection range, and each of which is used to detect the flow value of the water pump (200) to be detected; The flow regulating assembly (400) comprises a plurality of flow regulating members, each of which has a different flow regulating range, and each of which is used to regulate the flow of liquid flowing through the water pump (200) to be tested; Each of the flow detection components, the water pump (200) to be detected, and each of the flow detection components are electrically connected to the control unit; The control unit controls the activation of the flow detection component corresponding to the set flow value according to the set flow value of the water pump (200) to be detected, and the control unit controls the activation of at least one flow regulating component according to the activated flow detection component, so that the flow value detected by the activated flow detection component is the same as the set flow value.

2. The water pump testing device according to claim 1, characterized in that: Each of the flow regulating components comprises a regulating tube (430), the diameters of the regulating tubes (430) are different, and each of the regulating tubes (430) is in communication with the water pump (200) to be tested; Each regulating pipe (430) is provided with a regulating valve (440), and each regulating valve (440) is electrically connected to the control unit.

3. The water pump testing device according to claim 2, characterized in that: The flow regulating assembly (400) further comprises a first flow guiding main pipe (410) and a second flow guiding main pipe (420), one end of each regulating pipe (430) being connected to the first flow guiding main pipe (410), and the other end of each regulating pipe (430) being connected to the second flow guiding main pipe (420); The first flow guiding main pipe (410) is connected to the liquid outlet connection assembly (300), the second flow guiding main pipe (420) is connected to a pressure stabilizing tank (500), and the pressure stabilizing tank (500) is connected to the flow detection assembly (800).

4. The water pump testing device according to claim 3, characterized in that: Each of the flow detection components comprises a connecting pipe (830), and each of the connecting pipes (830) is connected to the water pump (200) to be detected; Each of the connecting pipes (830) is provided with a flow meter (840) and a control valve (850); each of the flow meters (840) has a different flow detection range; each of the flow meters (840) and each of the control valves (850) are electrically connected to the control unit.

5. The water pump testing device according to claim 4, characterized in that: The flow detection assembly (800) further comprises a first connecting main pipe (820) and a second connecting main pipe (810), one end of each connecting pipe (830) being connected to the first connecting main pipe (820), and the other end of each connecting pipe (830) being connected to the second connecting main pipe (810); The first connecting main pipe (820) is connected to the pressure stabilizing tank (500), and the second connecting main pipe (810) is connected to the pressure regulating assembly (900).

6. The water pump testing device according to claim 5, characterized in that: The pressure regulating assembly (900) comprises a cavitation tank (910), a gas-liquid separation tank (950), a compressor (930) and at least one vacuum pump (940). The cavitation tank (910) is connected to the second connecting main pipe (810) and the liquid inlet connecting assembly (100) respectively, the cavitation tank (910) is connected to the gas-liquid separation tank (950) via a pneumatic pipeline (920), the compressor (930) is connected to the pneumatic pipeline (920), and the vacuum pump (940) is connected to the gas-liquid separation tank (950); The compressor (930) and the vacuum pump (940) are both electrically connected to the control unit.

7. The water pump testing device according to claim 6, characterized in that: The liquid inlet connection assembly (100) comprises a water inlet main pipe (110) and a plurality of water inlet connecting pipes (120) having different pipe diameters. The water inlet main pipe (110) is connected to the cavitation tank (910), each of the water inlet pipes (120) is connected to the water inlet main pipe (110), and each of the water inlet pipes (120) is selectively connected to the feed end of the water pump (200) to be tested. Each of the water inlet pipes (120) is provided with a water inlet control valve (130) and an inlet pressure sensor (140), and each of the water inlet control valves (130) and each of the inlet pressure sensors (140) are electrically connected to the control unit.

8. The water pump testing device according to claim 3, characterized in that: The liquid outlet connection assembly (300) comprises a water outlet main pipe (310) and a plurality of water outlet connecting pipes (320) having different pipe diameters. The water outlet main pipe (310) is connected to the first diversion main pipe (410), each of the water outlet pipes (320) is connected to the water outlet main pipe (310), and each of the water outlet pipes (320) is selectively connected to the discharge end of the water pump (200) to be tested. Each of the water outlet pipes (320) is provided with a water outlet control valve (330) and an outlet pressure sensor (340), and each of the water outlet control valves (330) and each of the outlet pressure sensors (340) are electrically connected to the control unit.

9. The water pump testing device according to any one of claims 1 to 8, characterized in that: The water inlet and outlet assembly (600) comprises a liquid inlet pipe (650), a liquid discharge pipe (630), a water replenishment pump (660) and a water discharge pump (620); the water replenishment pump (660) is located on the liquid inlet pipe (650); the water discharge pump (620) is located on the liquid discharge pipe (630); the liquid inlet pipe (650) and the liquid discharge pipe (630) are both connected to the water pump (200) to be detected; and the water replenishment pump (660) and the water discharge pump (620) are both electrically connected to the control unit.

10. The water pump testing device according to claim 9, characterized in that: The water inlet and outlet assembly (600) further comprises a water storage tank (640), wherein the water storage tank (640) is connected to the liquid discharge pipe (630), and the water storage tank (640) is connected to the liquid inlet pipe (650).

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