Water pump light load protection threshold value test system

Abstract

The utility model relates to the technical field of electronic water pump reliability testing, and discloses a water pump light load protection threshold value testing system which comprises a gas transmission detection device, a liquid transmission detection device, a water pump to be tested and an electrical control assembly. The gas conveying detection device comprises a compressed air output assembly, a gas conveying valve pipe and a gas flow meter installed on the gas conveying valve pipe, and one end of the gas conveying valve pipe is communicated with an output structure of the compressed air output assembly. According to the water pump light load protection threshold value test system provided by the utility model, the gas transmission detection device, the liquid transmission detection device and the electrical control assembly are combined for use, so that a certain volume of gas is uniformly mixed into the liquid, the actual use working condition of the water pump is simulated, and then the mixing proportion of the liquid and the gas is accurately adjusted; and the no-load protection threshold value of the water pump is accurately measured until light-load protection of the to-be-tested water pump is triggered.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pump reliability testing, in particular to a water pump light load protection threshold testing system. Background Art

[0002] Water pumps are widely used in automobile air conditioning cooling systems, motor cooling systems, and battery cooling systems as circulating power components for conveying media. However, in closed systems, due to the sealing of the system, medium loss will cause a certain amount of air to be contained in the circulation system. If the water pump runs in a system containing air for a long time, it may trigger (falsely trigger) the light load protection function of the water pump too early or too late (in order to avoid the shutdown protection set for idling and dry grinding of the water pump), causing the cooling system to stop working, which is likely to affect the use of the entire equipment. Moreover, at this stage, the water pump no-load protection setting is only based on experience. This requires experiments to accurately verify whether the water pump light load protection parameter settings are reasonable, and how much air content in the closed system affects the water pump function.

[0003] However, after the applicant conducted a comprehensive search of the prior art and actual products, it was found that the existing test device can only test the operating status of the water pump when liquid medium (full load) or air (no load) is passed through it, and the test parameter settings only have two extreme values. There are great deficiencies in rationality and how to determine the optimal light load protection threshold of the water pump. It does not fundamentally solve the problem that the water pump triggers the light load protection too early or too late in actual operation, making the system unable to work normally. Secondly, the existing equipment cannot adjust the mixing ratio of gas and liquid, so it is impossible to accurately obtain the light load protection threshold parameters of the water pump. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a water pump light load protection threshold test system, which solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a water pump light load protection threshold test system, comprising a gas transmission detection device, a liquid infusion detection device, a water pump to be tested and an electrical control component, wherein the gas transmission detection device comprises a compressed air output component, a gas transmission valve pipe and a gas flow meter installed on the gas transmission valve pipe, one end of the gas transmission valve pipe is connected to the output structure of the compressed air output component, the liquid infusion detection device comprises a liquid storage tank, a liquid infusion valve pipe and a liquid flow meter and a liquid pressure gauge installed on the liquid infusion valve pipe, one end of the liquid flow meter is sleeved in the bottom of the liquid storage tank;

[0006] A gas-liquid mixer is installed between the other end of the liquid flow meter and the other end of the gas valve pipe, the outside of the gas-liquid mixer is connected to the input end of the water pump to be tested through a connecting pipe, a circulation pipe valve is installed between the output end of the water pump to be tested and the top of the liquid storage tank, a differential pressure gauge is arranged between one end of the circulation pipe valve and the connecting pipe, and the electrical control component is electrically connected to the gas flow meter, the liquid flow meter, the liquid pressure gauge, the water pump to be tested and the differential pressure gauge through wires.

[0007] Preferably, the compressed air output assembly adopts a compressed air tank or an air compressor, with multiple options to adapt to different practical situations. The output end of the compressed air tank or the output end of the air compressor is connected to one end of the air valve pipe.

[0008] Preferably, a gas pressure sensor, a second solenoid valve and a one-way valve are installed on the gas valve pipe. The gas pressure sensor and the second solenoid valve are electrically connected to the electrical control component through wires. The user can perform unified control through the electrical control component and the valve set on the gas valve pipe structure itself is a manual valve.

[0009] Preferably, a first solenoid valve is installed on the infusion valve tube, and the first solenoid valve is electrically connected to the electrical control component through a wire, so as to further enhance the unified control effect of the electrical control component on the electrical components of the entire system, and the valve arranged on the structure of the infusion valve tube itself is also a manual valve.

[0010] The valve arranged on the structure of the circulation pipe valve itself is a manual valve, which is easy to operate, and there is no cross contact between the gas transmission valve pipe and the circulation pipe valve, thus avoiding structural interference.

[0011] Preferably, a liquid level gauge is provided on the front end of the liquid storage tank, through which the usage of the test liquid inside the liquid storage tank can be directly observed, which is convenient for subsequent timely replenishment, and an exhaust valve is installed on the top of the liquid storage tank, through which the air in the liquid storage tank and the detection pipeline formed by the integrated structure associated with the liquid storage tank can be processed, thereby reducing adverse factors for detection and improving detection accuracy.

[0012] Preferably, a refill valve tube is mounted on one side of the top of the liquid storage tank. The valve arranged on the structure of the refill valve tube itself is a manual valve. The refill valve tube provides a channel for replenishing the test solution into the liquid storage tank, thereby ensuring the sustainable use effect of the liquid storage tank.

[0013] Selectedly, the output end and input end of the water pump to be tested are both connected with a water inlet threaded joint, the end of the circulating pipe valve corresponding to the output end of the water pump to be tested is installed with a first water pump interface spirally locked with the water inlet threaded joint, and the end of the connecting pipe corresponding to the input end of the water pump to be tested is installed with a second water pump interface spirally locked with the water inlet threaded joint, thereby maintaining the flexibility and convenience of installation and disassembly of the water pump to be tested in the test system and meeting the test assembly conditions of multiple different water pumps to be tested.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The water pump light load protection threshold test system proposed by the utility model uses a combination of structures such as a gas transmission detection device, a liquid transmission detection device, an electrical control component, and a gas-liquid mixer to uniformly mix a certain volume of gas into the liquid to simulate the actual working conditions of the water pump, and then accurately adjusts the mixing ratio of liquid and gas until the light load protection of the water pump to be tested is triggered, and the water pump no-load protection threshold is accurately measured. Before the subsequent detection of multiple water pumps to be tested, the manual valve and the exhaust valve of the circulation pipe valve are opened to uniformly discharge the air in the detection pipeline of the circulation pipe valve, the liquid transmission valve pipe, the gas-liquid mixer, the connecting pipe, the gas transmission valve pipe and other structural combinations and the air inside the liquid storage tank, thereby eliminating adverse factors for subsequent detection and improving detection accuracy.

[0016] 2. The water pump light load protection threshold test system proposed in the utility model can compare the light load protection parameters set by the water pump to be tested after measuring the water pump no-load protection threshold value, so as to identify in advance whether the light load protection parameters of the water pump to be tested are set reasonably, make timely adjustments, and optimize the use effect of the water pump to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the structure of the utility model.

[0018] In the figure: 1. Liquid storage tank; 2. Liquid level meter; 3. Liquid replenishment valve pipe; 4. Exhaust valve; 5. Liquid infusion valve pipe; 6. Liquid pressure gauge; 7. First solenoid valve; 8. Liquid flow meter; 9. Gas-liquid mixer; 10. Water pump to be tested; 11. Differential pressure gauge; 12. Compressed air output component; 13. Gas delivery valve pipe; 14. Gas pressure sensor; 15. Second solenoid valve; 16. Gas flow meter; 17. One-way valve; 18. Circulation pipe valve; 19. Electrical control component. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 A water pump light load protection threshold test system includes a gas transmission detection device, a liquid transmission detection device, a water pump to be tested 10 and an electrical control component 19. The gas transmission detection device includes a compressed air output component 12, a gas transmission valve pipe 13 and a gas flow meter 16 installed on the gas transmission valve pipe 13. One end of the gas transmission valve pipe 13 is connected to the output structure of the compressed air output component 12. The compressed air output component 12 adopts a compressed air tank or an air compressor, which has multiple options to adapt to different actual situations. The output end of the compressed air tank or the output end of the air compressor is connected to one end of the gas transmission valve pipe 13;

[0021] A gas pressure sensor 14, a second solenoid valve 15 and a one-way valve 17 are installed on the gas delivery valve pipe 13 to prevent the liquid from flowing back through the gas delivery valve pipe 13. The gas pressure sensor 14 and the second solenoid valve 15 are electrically connected to the electrical control component 19 through a wire. The user can perform unified control through the electrical control component 19 and the valve set on the gas delivery valve pipe 13 itself is a manual valve;

[0022] The infusion detection device includes a liquid storage tank 1, an infusion valve tube 5, and a liquid flow meter 8 and a liquid pressure gauge 6 installed on the infusion valve tube 5. One end of the liquid flow meter 8 is sleeved in the bottom of the liquid storage tank 1. A liquid level meter 2 is arranged on the front end of the liquid storage tank 1. The use of the test liquid in the liquid storage tank 1 can be directly observed through the liquid level meter 2, which is convenient for subsequent timely replenishment. An exhaust valve 4 is installed on the top of the liquid storage tank 1. The exhaust valve 4 can be used to process the air in and out of the liquid storage tank 1 and the detection pipeline formed by the structure associated with the liquid storage tank 1, thereby reducing adverse factors for detection and improving detection accuracy. A liquid replenishment valve tube 3 is sleeved on one side of the top of the liquid storage tank 1. The valve arranged on the structure of the liquid replenishment valve tube 3 itself adopts a manual valve. The liquid replenishment valve tube 3 provides a channel for replenishing the test solution into the liquid storage tank 1, thereby ensuring the sustainable use effect of the liquid storage tank 1.

[0023] A gas-liquid mixer 9 is installed between the other end of the liquid flow meter 8 and the other end of the gas delivery valve pipe 13. The outside of the gas-liquid mixer 9 is connected to the input end of the water pump 10 to be tested through a connecting pipe. A circulation pipe valve 18 is installed between the output end of the water pump 10 to be tested and the top of the liquid storage tank 1. A differential pressure gauge 11 is provided between one end of the circulation pipe valve 18 and the connecting pipe. The electrical control component 19 is electrically connected to the gas flow meter 16, the liquid flow meter 8, the liquid pressure gauge 6, the water pump 10 to be tested and the differential pressure gauge 11 through wires.

[0024] The valve arranged on the structure of the circulation pipe valve 18 itself is a manual valve, which is easy to operate, and there is no cross-contact between the gas valve pipe 13 and the circulation pipe valve 18 to avoid structural interference. The output end and the input end of the water pump 10 to be tested are both connected with a water inlet threaded joint, and the end corresponding to the connection between the circulation pipe valve 18 and the output end of the water pump 10 to be tested is installed with a first water pump interface spirally locked with the water inlet threaded joint, and the end corresponding to the connection between the connecting pipe and the input end of the water pump 10 to be tested is installed with a second water pump interface spirally locked with the water inlet threaded joint, thereby maintaining the flexibility and convenience of installation and disassembly of the water pump 10 to be tested in the test system, and meeting the test assembly conditions of multiple different water pumps 10 to be tested.

[0025] Working principle:

[0026] Embodiment 1

[0027] The liquid storage tank 1 is used to store the liquid medium for the operation of the water pump, the liquid level meter 2 is used to observe the height of the liquid level inside the liquid storage tank 1, the gas-liquid mixer 9 fully mixes the gas and the liquid, the compressed air output component 12 is used to provide gas to the liquid, the one-way valve 17 can prevent the liquid from flowing back into the compressed air output component 12, the gas flow meter 16 and the liquid flow meter 8 are used to monitor and calculate the gas / liquid ratio in the medium pipeline, so that the overall system can monitor the gas and liquid flow, the electrical control component 19 controls the gas / liquid intake volume through the second solenoid valve 15 and the first solenoid valve 7, respectively, and can also monitor the light load protection function of the water pump 10 to be tested at what gas-liquid mixing ratio is triggered, and observes whether the water pump 10 to be tested reaches the flow point and whether the head is qualified through the differential pressure meter 11 and the liquid pressure gauge 6, and the gas pressure sensor 14 detects whether the gas pressure meets the standard;

[0028] During the test, the output end and the input end of the water pump 10 to be tested are connected to one end of the circulation pipe valve 18 and one end of the connecting pipe respectively, and the water pump 10 to be tested is electrically connected to the electrical control component 19. Then, the manual valve on the liquid infusion valve pipe 5, the manual valve on the gas delivery valve pipe 13 and the manual valve on the circulation pipe valve 18 are opened in sequence;

[0029] Then, the openings of the first solenoid valve 7 and the second solenoid valve 15 are adjusted by the electrical control component 19 so that the ratio of liquid flow rate to gas flow rate meets the experimental requirements. The electrical control component 19 is used to observe the running state of the water pump to see whether the light load protection is triggered. If not, the openings of the first solenoid valve 7 and the second solenoid valve 15 are continuously adjusted until the light load protection of the water pump 10 to be tested is triggered at a certain ratio of liquid flow rate to gas flow rate. Then, this data value is the accurate no-load protection threshold value of the water pump 10 to be tested.

[0030] When the liquid in the liquid storage tank 1 is consumed and needs to be replenished, the manual valve of the liquid replenishing valve tube 3 is opened, and the replenishing liquid is added into the liquid storage tank 1 through the liquid replenishing valve tube 3.

[0031] Embodiment 2

[0032] When the test of one water pump 10 to be tested is completed, if another water pump 10 to be tested of a different specification needs to be tested, the tested water pump 10 is disassembled, and then another water pump 10 to be tested of a different specification is assembled with the circulating pipe valve 18 and the connecting pipe in the same way. After completion, the manual valve of the circulating pipe valve 18 and the exhaust valve 4 are opened, and then the air in the test pipeline composed of the circulating pipe valve 18, the liquid infusion valve pipe 5, the gas-liquid mixer 9, the connecting pipe, the gas infusion valve pipe 13 and the air inside the liquid storage tank 1 are uniformly discharged to eliminate adverse factors for subsequent detection, and then the steps of Example 1 are repeated.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present utility model, the fill pattern is only for distinguishing the layers, without any other limitation.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pump light load protection threshold test system, comprising a gas transmission detection device, a liquid transmission detection device, a water pump to be tested (10) and an electrical control component (19), characterized in that: The gas transmission detection device comprises a compressed air output component (12), a gas transmission valve pipe (13), and a gas flow meter (16) installed on the gas transmission valve pipe (13); one end of the gas transmission valve pipe (13) is connected to the output structure of the compressed air output component (12); the liquid infusion detection device comprises a liquid storage tank (1), a liquid infusion valve pipe (5), and a liquid flow meter (8) and a liquid pressure gauge (6) installed on the liquid infusion valve pipe (5); one end of the liquid flow meter (8) is sleeved in the bottom of the liquid storage tank (1); A gas-liquid mixer (9) is installed between the other end of the liquid flow meter (8) and the other end of the gas delivery valve pipe (13); the outside of the gas-liquid mixer (9) is connected to the input end of the water pump (10) to be tested via a connecting pipe; a circulation pipe valve (18) is installed between the output end of the water pump (10) to be tested and the top of the liquid storage tank (1); a differential pressure gauge (11) is provided between one end of the circulation pipe valve (18) and the connecting pipe; and the electrical control component (19) is electrically connected to the gas flow meter (16), the liquid flow meter (8), the liquid pressure gauge (6), the water pump (10) to be tested and the differential pressure gauge (11) via wires.

2. A water pump light load protection threshold test system according to claim 1, characterized in that: The compressed air output component (12) adopts a compressed air tank or an air compressor, and the output end of the compressed air tank or the output end of the air compressor is connected to one end of the air delivery valve pipe (13).

3. A water pump light load protection threshold test system according to claim 1, characterized in that: A gas pressure sensor (14), a second solenoid valve (15) and a one-way valve (17) are installed on the gas delivery valve pipe (13); the gas pressure sensor (14) and the second solenoid valve (15) are electrically connected to an electrical control component (19) via a wire, and a valve is arranged on the structure of the gas delivery valve pipe (13) itself.

4. A water pump light load protection threshold test system according to claim 1, characterized in that: The infusion valve tube (5) is provided with a first solenoid valve (7), the first solenoid valve (7) being electrically connected to an electrical control component (19) via a wire, and the infusion valve tube (5) is provided with a valve on its own structure.

5. A water pump light load protection threshold test system according to claim 1, characterized in that: The valve arranged on the structure of the circulation pipe valve (18) itself is a manual valve, and there is no cross contact between the gas delivery valve pipe (13) and the circulation pipe valve (18).

6. A water pump light load protection threshold test system according to claim 1, characterized in that: A liquid level meter (2) is provided on the front end of the liquid storage tank (1), and an exhaust valve (4) is installed on the top of the liquid storage tank (1).

7. A water pump light load protection threshold test system according to claim 1, characterized in that: A liquid replenishment valve tube (3) is mounted on one side of the top of the liquid storage tank (1), and the valve arranged on the structure of the liquid replenishment valve tube (3) itself is a manual valve.

8. A water pump light load protection threshold test system according to claim 1, characterized in that: The output end and input end of the water pump to be tested (10) are both connected to a water inlet threaded joint, the end of the circulating pipe valve (18) correspondingly connected to the output end of the water pump to be tested (10) is equipped with a first water pump interface spirally locked with the water inlet threaded joint, and the end of the connecting pipe correspondingly connected to the input end of the water pump to be tested (10) is equipped with a second water pump interface spirally locked with the water inlet threaded joint.

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