Hydraulic cycle test system
By using a hydraulic circulation test system with pneumatic fluid pumps and liquid media, the energy consumption and safety hazards of the medium and high-pressure small volume test pieces in the prior art are solved, and efficient and accurate circulation test results are achieved.
Patent Information
- Application Number
- CN202422125066.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, when the pneumatic system performs cycling tests of high pressure and small volume test pieces, it consumes high energy, has a long boost time, and has safety risks, and it is difficult to accurately control the cycling pressure.
The pneumatic liquid pump uses compressed air as the power source and liquid as the test medium. It is tested through a hydraulic circulation test system, and combines a water replenishment pump and a variety of valve controls to achieve precise pressure control and reduce energy consumption.
It realizes efficient and precise cycling testing of high-pressure and small-voltage test pieces, reduces energy consumption and system losses, and improves safety.
Smart Images
Figure CN223136558U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogen energy equipment, and particularly relates to a hydraulic circulation test system. Background Art
[0002] In the hydrogen energy industry, some small-volume high-pressure-resistant components such as filters, check valves, and hydrogen filling ports need to be subjected to a durability cycle test to verify their functionality and safety, that is, to increase and decrease the pressure under their working pressure, and the number of cycles is basically more than ten thousand times.
[0003] At present, the commonly used durability cycle test system on the market is a gas-medium system, abbreviated as a pneumatic system. The working mode of the cycle test system is to increase the pressure of the test piece and release the pressure after reaching the working pressure. Since the gas has stronger compressibility, increasing the pressure is to compress the medium, so the pneumatic system requires a lot of gas to increase the pressure to the test pressure, and the time required for the gas to increase to high pressure is relatively long, resulting in high energy consumption. Moreover, once the test piece leaks or breaks under high pressure, the compressed gas will erupt instantaneously, carrying debris, causing great harm to the surrounding area, and seriously endangering personal safety in some cases.
[0004] In addition, the hydraulic boosting systems on the market complete the cycle test by boosting and relieving pressure, which is suitable for testing large-volume test pieces. For small-volume test pieces, the cycle pressure cannot be accurately controlled, and overpressure is likely to occur. Summary of the Utility Model
[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the existing cycle test system is not convenient for testing high-pressure small-volume test pieces, so as to provide a hydraulic cycle test system.
[0006] To solve the above technical problem, the utility model provides a hydraulic cycle test system, including:
[0007] A pneumatic liquid pump, having a gas inlet, a gas outlet, a liquid inlet, and a liquid outlet;
[0008] A make-up water pump, which is connected to the liquid inlet of the pneumatic liquid pump through a liquid inlet pipeline;
[0009] A liquid outlet pipeline, which is connected to the liquid outlet of the pneumatic liquid pump, and the other end of the liquid outlet pipeline is adapted to be connected to a test piece;
[0010] A first air inlet pipeline, which is connected to the gas inlet of the pneumatic liquid pump;
[0011] An air outlet pipeline, which is connected to the gas outlet of the pneumatic liquid pump.
[0012] Optionally, a first check valve that conducts unidirectionally towards the pneumatic liquid pump is provided on the liquid inlet pipeline between the makeup water pump and the pneumatic liquid pump.
[0013] Optionally, the makeup water pump is pneumatically driven.
[0014] Optionally, a pressure gauge, a first pressure transmitter, and a counter are connected to the liquid outlet pipeline.
[0015] Optionally, a speed control valve and an electro-pneumatic proportional valve are connected to the first air inlet pipeline.
[0016] Optionally, it further includes: a water tank, and the water tank is connected to the liquid inlet pipeline.
[0017] Optionally, a third air inlet pipeline is connected to the liquid inlet pipeline between the makeup water pump and the pneumatic liquid pump, and a second check valve that conducts unidirectionally towards the liquid inlet pipeline is provided on the third air inlet pipeline.
[0018] Optionally, it further includes: a liquid return pipeline, one end of the liquid return pipeline is connected to the test piece, and the other end of the liquid return pipeline is connected to the water tank.
[0019] Optionally, a pneumatic valve is connected to the liquid return pipeline, and a fourth air inlet pipeline is connected to the pneumatic valve.
[0020] Optionally, a second pressure transmitter is connected to the liquid return pipeline.
[0021] The technical solution of the present utility model has the following advantages:
[0022] The hydraulic cycle test system provided by the present utility model uses a pneumatic liquid pump, with compressed air as the power source and liquid as the test medium. Compared with gas media, it is easier to increase pressure, can accurately control the cycle pressure, can reduce energy consumption and system losses, and is more suitable for high-pressure small-volume hydraulic cycle tests. Description of the Drawings
[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0024] Figure 1 It is the front view of a specific embodiment of the hydraulic cycle test system provided in the embodiment of the present utility model.
[0025] Explanation of the reference numerals:
[0026] 1. Pneumatic liquid pump; 2. Make-up water pump; 3. Liquid inlet pipeline; 4. Liquid outlet pipeline; 5. First air inlet pipeline; 6. Air outlet pipeline; 7. First check valve; 8. Test piece; 9. Second air inlet pipeline; 10. First filter pressure regulator; 11. First solenoid valve; 12. First safety valve; 13. Pressure gauge; 14. First pressure transmitter; 15. Counter; 16. First manual valve; 17. Second safety valve; 18. Speed control valve; 19. Electric proportional valve; 20. First electromagnetic switching valve; 21. Water tank; 22. Water outlet valve; 23. Filter; 24. Third air inlet pipeline; 25. Second check valve; 26. Liquid return pipeline; 27. Pneumatic valve; 28. Fourth air inlet pipeline; 29. Bypass pipeline; 30. Second manual valve; 31. Air inlet main pipe; 32. Second filter pressure regulator; 33. Second pressure transmitter. Detailed implementation manners
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0030] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0031] Such as Figure 1As shown in the figure, a specific implementation of the hydraulic cycle test system provided in this embodiment includes: a pneumatic liquid pump 1, a make-up water pump 2, a liquid inlet pipeline 3, a liquid outlet pipeline 4, a first air inlet pipeline 5, and an air outlet pipeline 6. The pneumatic liquid pump 1 has a gas inlet, a gas outlet, a liquid inlet, and a liquid outlet. The make-up water pump 2 is connected to the pneumatic liquid pump 1 through the liquid inlet pipeline 3. Specifically, the liquid inlet pipeline 3 is connected to the liquid inlet of the pneumatic liquid pump 1. During operation, the make-up water pump 2 provides a high-pressure medium that can be discharged at a set pressure once for the pneumatic liquid pump 1. A first check valve 7 that conducts unidirectionally towards the pneumatic liquid pump 1 is connected to the liquid inlet pipeline 3. The liquid outlet pipeline 4 is connected to the liquid outlet of the pneumatic liquid pump 1, and the other end of the liquid outlet pipeline 4 is adapted to be connected to a test piece 8. The first air inlet pipeline 5 is connected to the gas inlet of the pneumatic liquid pump 1. The air outlet pipeline 6 is connected to the gas outlet of the pneumatic liquid pump 1.
[0032] The hydraulic cycle test system provided in this embodiment uses a pneumatic liquid pump 1, with compressed air as the power source and liquid as the test medium. Compared with gas media, it is easier to increase pressure, can accurately control the cycle pressure, can reduce energy consumption and system losses, and is more suitable for high-pressure and small-volume hydraulic cycle tests.
[0033] As Figure 1 shown in the figure, in this embodiment, the make-up water pump 2 is pneumatically driven. Specifically, it can be connected to the make-up water pump 2 through a second air inlet pipeline 9. A first filter pressure regulator 10 and a first solenoid valve 11 are connected to the second air inlet pipeline 9. The first filter pressure regulator 10 is used for filtering and regulating pressure, and the first solenoid valve 11 is used to connect or close the second air inlet pipeline 9. Of course, the above description is not restrictive. In some alternative embodiments, the make-up water pump 2 can also be driven in other ways, such as electric drive, etc.
[0034] As Figure 1 shown in the figure, a first safety valve 12 is provided on the liquid inlet pipeline 3 between the make-up water pump 2 and the pneumatic liquid pump 1 to prevent the pressure on this section of the liquid inlet pipeline 3 from exceeding the pressure. Of course, the above description is not restrictive. In some alternative embodiments, the first safety valve 12 can be omitted.
[0035] As Figure 1As shown in the figure, in this embodiment, a pressure gauge 13, a first pressure transmitter 14, and a counter 15 are connected to the liquid outlet pipeline 4. Specifically, the pressure gauge 13 and the first pressure transmitter 14 are commonly connected to the liquid outlet pipeline 4 through a detection pipe, and a first manual valve 16 is provided on the detection pipe. The pressure gauge 13 is used to detect the pressure on the liquid outlet pipeline 4, the first pressure transmitter 14 is used to transmit the pressure on the liquid outlet pipeline 4 to the controller, and the counter 15 is used to detect the number of times the medium flows on the liquid outlet pipeline 4. A second safety valve 17 is also connected to the liquid outlet pipeline 4, and the second safety valve 17 is used to protect the pressure on the liquid outlet pipeline 4 from overpressure. Of course, the above description is not restrictive. In some alternative embodiments, the pressure gauge 13, the first pressure transmitter 14, and the counter 15 can all be omitted, or the above devices can be arranged on the test piece 8, etc.
[0036] As Figure 1 shown in the figure, in this embodiment, a speed regulating valve 18 and an electro-pneumatic proportional valve 19 are connected to the first air inlet pipeline 5. The speed regulating valve 18 is used to adjust the pumping speed of the pneumatic liquid pump 1, and the electro-pneumatic proportional valve 19 is used to adjust the driving air pressure entering the pneumatic liquid pump 1. Of course, the above description is not restrictive. In some alternative embodiments, other control components can also be used to control the gas in the first air inlet pipeline 5. For example, a manual regulating valve can be used.
[0037] As Figure 1 shown in the figure, in this embodiment, a first electromagnetic switching valve 20 is connected between the first air inlet pipeline 5 and the air outlet pipeline 6, and the first electromagnetic switching valve 20 is used to switch the connection or closure between the first air inlet pipeline 5 and the air outlet pipeline 6. Of course, the above description is not restrictive. In some alternative embodiments, other control valves can also be used, such as a manual switching valve.
[0038] As Figure 1 shown in the figure, in this embodiment, it further includes: a water tank 21, and the water tank 21 is connected to the liquid inlet pipeline 3. The water tank 21 is used to provide a test liquid medium. An outlet valve 22 and a filter 23 are provided on the liquid inlet pipeline 3 between the water tank 21 and the make-up water pump 2. Of course, the above description is not restrictive. In some alternative embodiments, the water tank 21 can be omitted. For example, the liquid inlet pipeline 3 can be directly connected to other water sources.
[0039] As Figure 1As shown, in this embodiment, a third intake air pipe 24 is connected to the liquid inlet pipe 3. A second check valve 25 that conducts unidirectionally toward the liquid inlet pipe 3 is provided on the third intake air pipe 24. The third intake air pipe 24 is used to discharge the liquid in the test piece 8 with gas. Of course, the above description is not restrictive. In some alternative embodiments, the third intake air pipe 24 can be omitted.
[0040] As Figure 1 shown, in this embodiment, it further includes: a liquid return pipe 26. One end of the liquid return pipe 26 is connected to the test piece 8, and the other end of the liquid return pipe 26 is connected to the water tank 21. The liquid return pipe 26 is used to recover the test liquid medium in the test piece 8. Of course, the above description is not restrictive. In some alternative embodiments, the liquid return pipe 26 can be omitted.
[0041] As Figure 1 shown, in this embodiment, a pneumatic valve 27 is connected to the liquid return pipe 26. The pneumatic valve 27 is connected to a fourth intake air pipe 28. The fourth intake air pipe 28 is used to open or close the pneumatic valve 27, so that the liquid return pipe 26 is connected or disconnected. A bypass pipe 29 is provided on the liquid return pipe 26. A second manual valve 30 is connected to the bypass pipe 29. The second manual valve 30 is used to manually open or close when the pneumatic valve 27 is damaged. Of course, the above description is not restrictive. In some alternative embodiments, the pneumatic valve 27 can be replaced with other valves, such as solenoid valves, etc.
[0042] As Figure 1 shown, upstream of the third intake air pipe 24 and the fourth intake air pipe 28, they are connected to the intake main pipe 31 through a three-way valve. A second filter pressure regulator 32 is provided on the intake main pipe 31. The second filter pressure regulator 32 is used to adjust and filter the intake air pressure. Of course, the above description is not restrictive. In some alternative embodiments, the upstream of the third intake air pipe 24 and the fourth intake air pipe 28 may not be connected.
[0043] As Figure 1 shown, in this embodiment, a second pressure transmitter 33 is connected to the liquid return pipe 26. The second pressure transmitter 33 is used to detect the pressure on the liquid return pipe 26 and transmit the pressure on the liquid return pipe 26 to the controller. Of course, the above description is not restrictive. In some alternative embodiments, the second pressure transmitter 33 can be omitted.
[0044] Usage method:
[0045] As Figure 1As shown, the hydraulic cycle test system provided in this embodiment has a dual mode.
[0046] For the test piece 8 with a one-way function, the following mode is adopted:
[0047] First, the make-up water pump 2 is used to convey liquid into the test piece 8. When the test piece 8 and the pipeline are filled with liquid, the pneumatic liquid pump 1 is used to pressurize the test piece 8. At the same time, the make-up water pump 2 continuously supplies water to the pneumatic liquid pump 1. When the pressure in the test piece 8 reaches the test pressure, the pneumatic liquid pump 1 is used to maintain the liquid pressure in the test piece 8. Finally, the pressurized liquid in the test piece 8 is discharged into the water tank 21 to complete a test cycle.
[0048] For the test piece 8 without a one-way function, the following mode is adopted:
[0049] First, the system omits the first check valve 7. When testing the test piece 8, the reverse rotation of the pneumatic liquid pump 1 can be used to more quickly discharge the pressure in the test piece 8, and the forward rotation of the pneumatic liquid pump 1 can be used to more quickly pressurize the test piece 8. Thereby, the efficiency of the experiment is improved, the loss is lower, and the experiment time is shorter.
[0050] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
Claims
1. A hydraulic cycle test system, characterized in that, Comprising: A pneumatic liquid pump (1) having a gas inlet, a gas outlet, a liquid inlet and a liquid outlet; A make-up water pump (2) connected to the liquid inlet of the pneumatic liquid pump (1) through a liquid inlet pipeline (3); A liquid outlet pipeline (4) connected to the liquid outlet of the pneumatic liquid pump (1), and the other end of the liquid outlet pipeline (4) is adapted to be connected to a test piece (8); A first air inlet pipeline (5) connected to the gas inlet of the pneumatic liquid pump (1); An air outlet pipeline (6) connected to the gas outlet of the pneumatic liquid pump (1).
2. The hydraulic cycle test system according to claim 1, characterized in that, On the liquid inlet pipeline (3) between the make-up water pump (2) and the pneumatic liquid pump (1), a first check valve (7) that conducts unidirectionally towards the pneumatic liquid pump (1) is provided.
3. The hydraulic cycle test system according to claim 2, wherein The make-up water pump (2) is pneumatically driven.
4. The hydraulic cycle test system according to claim 1, wherein, A pressure gauge (13), a first pressure transmitter (14) and a counter (15) are connected to the liquid outlet pipeline (4).
5. The hydraulic cycle test system according to claim 1, wherein A speed regulating valve (18) and an electro-pneumatic proportional valve (19) are connected to the first air inlet pipeline (5).
6. The hydraulic cycle test system according to any one of claims 1-5, characterized in that Further comprising: A water tank (21) connected to the liquid inlet pipeline (3).
7. The hydraulic cycle test system according to claim 6, characterized in that, A third air inlet pipeline (24) is connected to the liquid inlet pipeline (3) between the make-up water pump (2) and the pneumatic liquid pump (1), and a second check valve (25) that conducts unidirectionally towards the liquid inlet pipeline (3) is provided on the third air inlet pipeline (24).
8. The hydraulic cycle test system according to claim 6, characterized in that, Further comprising: A liquid return pipeline (26), one end of the liquid return pipeline (26) is connected to the test piece (8), and the other end of the liquid return pipeline (26) is connected to the water tank (21).
9. The hydraulic cycle test system according to claim 8, characterized in that, A pneumatic valve (27) is connected to the liquid return pipeline (26), and a fourth air inlet pipeline (28) is connected to the pneumatic valve (27).
10. The hydraulic cycle test system according to claim 8, characterized in that, A second pressure transmitter (33) is connected to the liquid return pipeline (26).