Pump diaphragm service life testing device

Abstract

The utility model provides a pump membrane service life testing device, and relates to the technical field of membrane service life testing. The testing device comprises a first open type cavity and a second open type cavity, the driving assembly comprises a pushing part, a transmission rod and a power structure, the pushing part is movably arranged in the second open type cavity, and the transmission rod connects the pushing part with the power structure and is used for transmitting power of the power structure to the pushing part so as to drive the pushing part to do reciprocating motion; the liquid circulation assembly comprises a circulation liquid supply box, a liquid inlet pipeline and a liquid return pipeline, one end of the liquid inlet pipeline communicates with a liquid outlet of the circulation liquid supply box, the other end of the liquid inlet pipeline communicates with the interior of the first open type cavity, one end of the liquid return pipeline communicates with a liquid return opening of the circulation liquid supply box, and the other end of the liquid return pipeline communicates with the interior of the first open type cavity; the supporting frame is used for being connected with the second open type cavity; the supporting frame is provided with a telescopic rod. According to the testing device, the installation process of the pump diaphragm is greatly simplified, and the installation time is remarkably shortened.

Description

Technical Field

[0001] This utility model relates to the field of membrane life testing technology, and more specifically, to a pump membrane life testing device. Background Technology

[0002] Hemodialysis, as an important renal replacement therapy, is widely used in the treatment of acute and chronic renal failure. The human kidney filters blood, maintains water and electrolyte balance, and removes metabolic waste. When kidney function is impaired, hemodialysis can play a replacement role. This process utilizes the principle of a semipermeable membrane, drawing the patient's blood out of the body and exchanging substances with the dialysate in the dialyzer. Waste products such as urea and creatinine, along with excess water, diffuse into the dialysate, while beneficial substances in the dialysate enter the blood. The purified blood is then returned to the body. During this process, a membrane pump precisely controls the flow rate of blood and dialysate, ensuring that both circulate at an appropriate rate within the dialyzer for efficient substance exchange. Simultaneously, it effectively avoids direct contact between blood and mechanical components, reducing the risk of blood contamination and lowering shear forces on the blood to prevent hemolysis, ensuring the integrity of blood components and patient safety.

[0003] The lifespan of the pump membrane has a profound impact on the overall effectiveness of hemodialysis and the patient's treatment experience. If the pump membrane has a short lifespan, its stability in controlling blood and dialysate flow will decrease, leading to reduced dialysis efficiency, affecting the removal of metabolic waste and the regulation of water and electrolyte balance, thus threatening the patient's health. Frequent replacement of the pump membrane not only increases treatment costs but may also introduce new risks during equipment adjustments, causing inconvenience to patients. Therefore, testing the pump membrane's lifespan is crucial. Through testing, the pump membrane's design and material selection can be optimized, improving its durability and stability, ensuring the continuous and stable operation of the hemodialysis equipment, providing patients with safe and reliable treatment services, and reducing the treatment burden and potential risks.

[0004] In existing technologies, pump membrane life testing typically utilizes a comprehensive membrane life testing system. This system, centered on the pump membrane life testing system, integrates pressure regulation and measurement systems, temperature control systems, and data acquisition and control systems. Specifically, the pump membrane life testing system comprises a power structure, a pump membrane drive structure, a test chamber structure, and a liquid circulation structure. The test chamber is the key component that houses the pump membrane under test. During installation, personnel must first open the chamber and precisely position the pump membrane in the preset location. Subsequently, the test chamber is closed, and sealant or other materials are applied to the connection points for sealing. However, this installation process is quite complex. The sealing operation is not only technically demanding and time-consuming, but even slight errors can lead to poor sealing results. The overall installation is challenging, necessitating technological improvements to simplify the process and enhance installation efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a pump membrane life testing device, which aims to solve the technical problems in the background art mentioned above.

[0006] The embodiments of this utility model are implemented as follows:

[0007] This application provides a pump membrane life testing device, comprising: a first open cavity and a second open cavity that are connected to each other, wherein the first open cavity is capable of moving towards or away from the second open cavity; a drive assembly, comprising a pusher, a transmission rod, and a power structure, wherein the pusher is movably disposed inside the second open cavity and the moving direction of the pusher is the same as the moving direction of the first open cavity, and the transmission rod connects the pusher and the power structure to transmit the power of the power structure to the pusher to drive the pusher to reciprocate; a liquid circulation assembly, comprising a circulating liquid supply tank, an inlet pipe, and a return pipe, wherein one end of the inlet pipe is connected to the outlet of the circulating liquid supply tank and the other end is connected to the interior of the first open cavity, and one end of the return pipe is connected to the return port of the circulating liquid supply tank and the other end is connected to the interior of the first open cavity; and a support frame for connecting the second open cavity; wherein the support frame is provided with a telescopic rod for driving the movement of the first open cavity.

[0008] Furthermore, based on the aforementioned scheme, the second open cavity is disposed above the first open cavity, the circulating liquid supply tank is disposed below the first open cavity, and the circulating liquid supply tank and the first open cavity are connected by a connecting column.

[0009] The telescopic end of the telescopic rod is connected to the circulating liquid supply tank, which is used to drive the circulating liquid supply tank and the first open cavity to move synchronously.

[0010] Furthermore, based on the aforementioned scheme, the internal structure of the circulating liquid supply tank is provided with an independent oil supply chamber and an oil return chamber. The oil supply chamber is connected to the inlet pipeline, and the oil return chamber is connected to the return pipeline.

[0011] The inlet pipeline is equipped with a first check valve pointing to the first open cavity, and the return pipeline is equipped with a second check valve pointing to the return oil chamber.

[0012] Furthermore, based on the aforementioned scheme, the oil supply chamber and the oil return chamber are connected by a guide pipe, and the guide pipe is equipped with a third one-way valve for pointing to the oil supply chamber.

[0013] Furthermore, based on the aforementioned scheme, the aforementioned power structure includes a drive motor, a return spring, a half gear, and a rack. The end of the aforementioned transmission rod away from the aforementioned pusher extends through to the outside of the aforementioned second open cavity and is connected to the aforementioned rack. The aforementioned rack meshes with the aforementioned half gear, and the aforementioned half gear is connected to the aforementioned drive motor. The aforementioned return spring is disposed inside the aforementioned second open cavity, with one end connected to the aforementioned pusher and the other end connected to the aforementioned second open cavity.

[0014] The transmission rod includes an alternating first motion state and a second motion state. When the transmission rod is in the first motion state, the half gear and the rack mesh, driving the pusher to move towards the first open cavity. The return spring stores energy. When the transmission rod is in the second motion state, the half gear and the rack disengage, the return spring releases the energy stored in the first motion state, and drives the pusher to reset.

[0015] Furthermore, based on the aforementioned scheme, the drive motor and the half gear are connected by a gearbox.

[0016] Furthermore, based on the aforementioned scheme, the support frame is equipped with a protective box, and the power structure and the gearbox are both housed within the protective box.

[0017] Furthermore, based on the aforementioned scheme, a guide ring is provided inside the protective box, and the transmission rod slides in conjunction with the guide ring.

[0018] Furthermore, based on the aforementioned scheme, the protective box is equipped with heat dissipation holes.

[0019] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] When the pump membrane life testing device of this application is put into practical use, the telescopic rod on the support frame is first operated to smoothly move the first open cavity away from the second open cavity along a preset track. At this time, the operator can easily place the pump membrane to be tested between the two cavities. After placement, the telescopic rod is operated again to precisely align the first open cavity with the second open cavity, and the two fit tightly together to achieve reliable clamping and positioning of the pump membrane. During the alignment process, the first and second open cavities naturally form a sealed test chamber. The pump membrane not only effectively separates the two cavities, but also, due to its own characteristics, simultaneously completes the sealing at the alignment point, avoiding cumbersome operations such as applying sealant. Next, the liquid circulation component starts to work, and the liquid in the circulation supply tank flows quickly into the space enclosed by the pump membrane and the first open cavity through the inlet pipe. At the same time, the power structure drives the transmission rod to reciprocate, and the transmission rod precisely transmits power to the pusher. The pusher moves back and forth inside the second open cavity along the same trajectory as the movement direction of the first open cavity, thereby causing the pump membrane to continuously reciprocate and deform. Under the action of the pump diaphragm, the circulating fluid flows orderly in a closed loop consisting of the circulating supply tank, the inlet pipe, the first open cavity, and the return pipe. By recording the number of reciprocating strokes of the pump diaphragm, the pump diaphragm life can be easily tested. Compared with traditional testing devices, this device greatly simplifies the pump diaphragm installation process, significantly shortens the installation time, effectively reduces the technical requirements for operators, and at the same time comprehensively ensures the sealing performance of the test chamber. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view of a pump membrane life testing device according to an embodiment of the present invention;

[0023] Figure 2 An isometric test device for pump diaphragm life testing according to an embodiment of this utility model. Figure 1 ;

[0024] Figure 3 An isometric test device for pump diaphragm life testing according to an embodiment of this utility model. Figure 2 ;

[0025] Figure 4 This is a partial cross-sectional view of a pump diaphragm life testing device according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 5 This is a partial cross-sectional view of a pump diaphragm life testing device according to an embodiment of the present invention. Figure 2 ;

[0027] Figure 6 This is a diagram showing the internal structure of the protective box according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the meshing structure of the rack and pinion in an embodiment of the present invention.

[0029] Icons: 1-Support frame, 2-Telescopic rod, 3-Circulating liquid supply tank, 301-Oil supply chamber, 302-Oil return chamber, 4-Inlet pipe, 5-First check valve, 6-Return pipe, 7-Second check valve, 8-Guide pipe, 9-Third check valve, 10-First open cavity, 11-Second open cavity, 12-Transmission rod, 13-Protective box, 14-Control panel, 15-Heat dissipation hole, 16-Oil supply tank, 17-Reset spring, 18-Pushing component, 19-Drive motor, 20-Gearbox, 21-Rack, 22-Half gear, 23-Ring component, 24-Magnetic component, 25-Electromagnet, 26-Guide ring. Detailed Implementation

[0030] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0031] Please refer to Figures 1-6 This application provides a pump membrane life testing device, comprising: a first open cavity 10 and a second open cavity 11 connected to each other, wherein the first open cavity 10 is capable of moving towards or away from the second open cavity 11; and a driving assembly, comprising a pusher 18, a transmission rod 12, and a power structure, wherein the pusher 18 is movably disposed inside the second open cavity 11, and the moving direction of the pusher 18 is the same as the moving direction of the first open cavity 10; the transmission rod 12 connects the pusher 18 and the power structure, and is used to drive the power structure... Force is transmitted to the aforementioned pusher 18 to drive the reciprocating motion of the aforementioned pusher 18; the liquid circulation assembly includes a circulating liquid supply tank 3, an inlet pipe 4, and a return pipe 6, one end of the aforementioned inlet pipe 4 is connected to the outlet of the aforementioned circulating liquid supply tank 3, and the other end is connected to the interior of the aforementioned first open cavity 10, one end of the aforementioned return pipe 6 is connected to the return port of the aforementioned circulating liquid supply tank 3, and the other end is connected to the interior of the aforementioned first open cavity 10; and a support frame 1 for connecting the aforementioned second open cavity 11; wherein the aforementioned support frame 1 is provided with a telescopic rod 2 for driving the movement of the aforementioned first open cavity 10.

[0032] When the pump membrane life testing device of this application is put into practical use, the telescopic rod 2 on the support frame 1 is first operated to make the first open cavity 10 move smoothly away from the second open cavity 11 along a preset track. At this time, the operator can easily place the pump membrane to be tested between the two cavities. After placement, the telescopic rod 2 is operated again to make the first open cavity 10 precisely align with the second open cavity 11. The two fit tightly together, achieving reliable clamping and positioning of the pump membrane. During the alignment process, the first open cavity 10 and the second open cavity 11 naturally form a sealed test chamber. The pump membrane not only effectively separates the two cavities, but also, due to its own characteristics, simultaneously completes the sealing at the alignment point, avoiding cumbersome operations such as applying sealant. Immediately afterwards, the liquid circulation component starts to work, and the liquid in the circulating supply tank 3 flows rapidly into the space enclosed by the pump membrane and the first open cavity 10 through the inlet pipe 4. Meanwhile, the power structure drives the transmission rod 12 to reciprocate, which precisely transmits power to the pusher 18. The pusher 18, inside the second open cavity 11, reciprocates along the same trajectory as the first open cavity 10, thereby causing the pump diaphragm to continuously deform. Under the action of the pump diaphragm, the circulating fluid flows orderly in the closed loop formed by the circulating supply tank 3, the inlet pipe 4, the first open cavity 10, and the return pipe 6. By recording the number of reciprocations of the pump diaphragm, the pump diaphragm life can be easily tested. Compared to traditional testing devices, this device greatly simplifies the pump diaphragm installation process, significantly shortens the installation time, effectively reduces the technical requirements for operators, and comprehensively ensures the sealing performance of the test chamber.

[0033] Please refer to Figure 7 Optionally, an annular member 23 is arranged circumferentially on the inner side of the second open cavity, and this annular member 23 can move flexibly in the vertical direction. Magnets 24 are symmetrically mounted on the upper side of the annular member 23. Correspondingly, an electromagnet 25 is provided at the position of the second open cavity above the magnets 24. When the electromagnet 25 is positively energized, it generates a magnetic field that exerts a force on the magnets 24, causing the annular member 23 to move vertically downwards and press tightly against the pump diaphragm. Simultaneously, the first open cavity works in conjunction, and the clamping effect of both significantly improves the stability of the pump diaphragm positioning.

[0034] To further ensure the smooth movement of the annular component 23, a slider is provided on the annular component 23, and the second open inner cavity is equipped with a groove that slides in conjunction with the slider. During the up-and-down movement of the annular component 23, the slider slides within the groove, effectively limiting the movement trajectory of the annular component 23, preventing it from deviating or wobbling, and ensuring that the annular component 23 can always accurately press the pump membrane.

[0035] In a preferred embodiment, the second open cavity 11 is disposed above the first open cavity 10, the circulating liquid supply tank 3 is disposed below the first open cavity 10, and the circulating liquid supply tank 3 and the first open cavity 10 are connected by a connecting column.

[0036] The telescopic end of the telescopic rod 2 is connected to the circulating liquid supply tank 3, which is used to drive the circulating liquid supply tank 3 and the first open cavity 10 to move synchronously.

[0037] In the above embodiment, the second open cavity 11 is positioned above the first open cavity 10, and the circulating liquid supply tank 3 is placed below the first open cavity 10 and connected by a connecting column. Simultaneously, the telescopic end of the telescopic rod 2 is connected to the circulating liquid supply tank 3, causing the circulating liquid supply tank 3 to move synchronously with the first open cavity 10, bringing multiple advantages. In terms of spatial layout, the vertical distribution effectively saves floor space, making the device structure compact and facilitating installation and operation in limited spaces. During pump membrane installation, the lower first open cavity 10 is more easily accessible, allowing operators to easily place the pump membrane and reducing operational difficulty.

[0038] In a preferred embodiment, the circulating liquid supply tank 3 is provided with an independent oil supply chamber 301 and an oil return chamber 302. The oil supply chamber 301 is connected to the liquid inlet pipe 4, and the oil return chamber 302 is connected to the liquid return pipe 6.

[0039] The inlet pipe 4 is equipped with a first check valve 5, which is directed to the first open cavity 10, and the return pipe 6 is equipped with a second check valve 7, which is directed to the return oil chamber 302.

[0040] In the above embodiments, the independent oil supply chamber 301 and oil return chamber 302 effectively avoid mutual interference between the supply and return of liquid. The first one-way valve 5 and the second one-way valve 7 precisely control the flow direction of the circulating liquid, eliminating backflow and preventing abnormal test data or equipment failure caused by backflow. This unidirectional flow design also makes the pressure distribution of the circulation system more stable, ensuring that the pump diaphragm is tested under stable operating conditions and improving the reliability of the test results.

[0041] In a preferred embodiment, the oil supply chamber 301 and the oil return chamber 302 are connected by a guide pipe 8, and the guide pipe 8 is provided with a third one-way valve 9 for pointing to the oil supply chamber 301.

[0042] In the above embodiment, when the pump diaphragm reciprocates during the test, part of the returned liquid can smoothly flow back to the oil supply chamber 301 through the guide pipe 8 under the control of the third one-way valve 9, achieving dynamic balance of the circulating liquid. This avoids pressure imbalance in the circulation system due to excessively high liquid level in the return oil chamber 302 or excessively low liquid level in the oil supply chamber 301, ensuring the stability of the test process. The orderly return of the circulating liquid reduces the system's dependence on external liquid supply equipment, improves the independence of the test device, and avoids interference with the test process due to insufficient or interrupted liquid supply.

[0043] Preferably, the liquid circulation assembly further includes an oil supply tank 16, which has an outlet and an inlet. The outlet and inlet are connected to the oil supply chamber 301 and the oil return chamber 302 respectively through pipelines. Pumps are installed at both the inlet and the outlet. The pump at the inlet transports the oil from the oil supply tank 16 to the oil supply chamber 301, and the pump at the outlet transports the oil from the oil return chamber 302 to the oil supply tank 16.

[0044] In a preferred embodiment, the power structure includes a drive motor 19, a return spring 17, a half gear 22, and a rack 21. The end of the transmission rod 12 away from the pusher 18 extends to the outside of the second open cavity 11 and is connected to the rack 21. The rack 21 meshes with the half gear 22, which is connected to the drive motor 19. The return spring 17 is disposed inside the second open cavity 11, with one end connected to the pusher 18 and the other end connected to the second open cavity 11.

[0045] The transmission rod 12 includes an alternating first motion state and a second motion state. When the transmission rod 12 is in the first motion state, the half gear 22 and the rack 21 mesh, driving the pusher 18 to move towards the first open cavity 10. The return spring 17 stores energy. When the transmission rod 12 is in the second motion state, the half gear 22 and the rack 21 disengage, the return spring 17 releases the energy stored in the first motion state, and drives the pusher 18 to reset.

[0046] In the above embodiment, the meshing design of the half gear 22 and the rack 21, driven by the drive motor 19, precisely controls the movement of the transmission rod 12, allowing the pusher 18 to move towards the first open cavity 10 with a stable frequency and stroke, simulating the force state of the pump diaphragm in actual operation and ensuring the accuracy of the test. Simultaneously, the return spring 17 stores energy during the movement of the pusher 18. When the half gear 22 disengages from the rack 21, the spring releases the previously stored energy, causing the pusher 18 to quickly return to its original position.

[0047] In a preferred embodiment, the drive motor 19 and the half gear 22 are connected by a gearbox 20.

[0048] In the above embodiments, the gearbox 20 can precisely control the speed of the drive motor 19. By changing the transmission ratio, the half gear 22 can run at different speeds to meet the diverse requirements of different pump diaphragm tests for the movement speed of the pusher 18.

[0049] In a preferred embodiment, the support frame 1 is provided with a protective box 13, and the power structure and the gearbox 20 are both housed inside the protective box 13.

[0050] In the above embodiments, the protective box 13 provides physical protection for the power structure and gearbox 20, effectively blocking the intrusion of external impurities such as dust, water vapor, and corrosive substances, avoiding these impurities from causing wear and corrosion to precision components, greatly extending the service life of the power structure and gearbox 20, reducing the probability of equipment failure due to component damage, and reducing the frequency and cost of equipment maintenance.

[0051] Preferably, the protective box 13 is mounted on the support frame 1. The protective box 13 includes a box body and a box door. An operation panel is provided on the box door for adjusting the speed of the gearbox 20.

[0052] In a preferred embodiment, a guide ring 26 is provided inside the protective box 13, and the transmission rod 12 is slidably engaged with the guide ring 26.

[0053] In the above embodiments, the guide ring 26 can accurately guide the movement direction of the transmission rod 12, effectively preventing the transmission rod 12 from deviating or shaking during reciprocating motion, ensuring that the pusher 18 applies force to the pump diaphragm stably, greatly improving the accuracy and reliability of test data, and reducing test errors caused by the movement deviation of the transmission rod 12.

[0054] Optionally, the number of guide rings is two, in order to further improve the stability of the movement of the transmission rod 12.

[0055] As a preferred embodiment, the protective box 13 is provided with heat dissipation holes 15.

[0056] In the above embodiments, the power structure and gearbox 20 will generate a lot of heat during long-term operation. The heat dissipation holes 15 can timely discharge the hot air in the protective box 13, accelerate air circulation, effectively reduce the temperature inside the box, avoid the performance degradation of components due to overheating, extend the service life of the power structure and gearbox 20, and significantly reduce the probability of equipment failure.

[0057] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0058] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A pump diaphragm life testing device, characterized in that, include: It includes a first open cavity (10) and a second open cavity (11) that are connected to each other, wherein the first open cavity (10) can move towards or away from the second open cavity (11); The drive assembly includes a pusher (18), a transmission rod (12), and a power structure. The pusher (18) is movably disposed inside the second open cavity (11), and the moving direction of the pusher (18) is the same as the moving direction of the first open cavity (10). The transmission rod (12) connects the pusher (18) and the power structure, and is used to transmit the power of the power structure to the pusher (18) to drive the reciprocating motion of the pusher (18). The liquid circulation assembly includes a circulation supply tank (3), an inlet pipe (4), and a return pipe (6). One end of the inlet pipe (4) is connected to the outlet of the circulation supply tank (3), and the other end is connected to the interior of the first open cavity (10). One end of the return pipe (6) is connected to the return port of the circulation supply tank (3), and the other end is connected to the interior of the first open cavity (10). as well as Support frame (1) for connecting the second open cavity (11); The support frame (1) is provided with a telescopic rod (2) for moving the first open cavity (10).

2. The pump diaphragm life testing device according to claim 1, characterized in that, The second open cavity (11) is located above the first open cavity (10), the circulating liquid supply tank (3) is located below the first open cavity (10), and the circulating liquid supply tank (3) and the first open cavity (10) are connected by a connecting column. The telescopic end of the telescopic rod (2) is connected to the circulating liquid supply tank (3) to drive the circulating liquid supply tank (3) and the first open cavity (10) to move synchronously.

3. The pump diaphragm life testing device according to claim 2, characterized in that, The circulating liquid supply tank (3) is provided with an independent oil supply chamber (301) and an oil return chamber (302). The oil supply chamber (301) is connected to the liquid inlet pipe (4), and the oil return chamber (302) is connected to the liquid return pipe (6). The inlet pipe (4) is equipped with a first check valve (5) for pointing to the first open cavity (10), and the return pipe (6) is equipped with a second check valve (7) for pointing to the return oil chamber (302).

4. The pump diaphragm life testing device according to claim 3, characterized in that, The oil supply chamber (301) and the oil return chamber (302) are connected by a guide pipe (8), and the guide pipe (8) is equipped with a third one-way valve (9) for pointing to the oil supply chamber (301).

5. The pump diaphragm life testing device according to claim 1, characterized in that, The power structure includes a drive motor (19), a return spring (17), a half gear (22), and a rack (21). The transmission rod (12) extends from the pusher (18) to the outside of the second open cavity (11) and is connected to the rack (21). The rack (21) meshes with the half gear (22). The half gear (22) is connected to the drive motor (19). The return spring (17) is located inside the second open cavity (11), with one end connected to the pusher (18) and the other end connected to the second open cavity (11). The transmission rod (12) includes an alternating first motion state and a second motion state. When the transmission rod (12) is in the first motion state, the half gear (22) and the rack (21) mesh, and drive the pusher (18) to move toward the first open cavity (10). The return spring (17) stores energy. When the transmission rod (12) is in the second motion state, the half gear (22) and the rack (21) disengage, and the return spring (17) releases the energy stored in the first motion state and drives the pusher (18) to reset.

6. The pump diaphragm life testing device according to claim 5, characterized in that, The drive motor (19) and the half gear (22) are connected by transmission through the gearbox (20).

7. The pump diaphragm life testing device according to claim 6, characterized in that, The support frame (1) is provided with a protective box (13), and the power structure and the gearbox (20) are both located inside the protective box (13).

8. The pump diaphragm life testing device according to claim 7, characterized in that, The protective box (13) is provided with a guide ring (26), and the transmission rod (12) slides in cooperation with the guide ring (26).

9. The pump diaphragm life testing device according to claim 7, characterized in that, The protective box (13) is provided with heat dissipation holes (15).

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