Pressure release valve detection device
By designing a pressure relief valve detection device including a vacuum box and a solenoid valve, the problems of large errors and long testing time in the prior art are solved, efficient and accurate detection is achieved, and the safety of using hydrogen is ensured.
Patent Information
- Application Number
- CN202420560283.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing pressure relief valve detection device has a large error, a long test time, and hydrogen cannot be used as the test medium, which affects the accuracy and safety of the test.
A pressure relief valve detection device is designed, including a first pipeline, a first pressure tester, a second pipeline, a second pressure tester, a first valve and a vacuum pump. Automatic detection is achieved through a vacuum box and a solenoid valve to improve the accuracy and efficiency of the test.
Through automatic detection technology, the device significantly improves the accuracy and efficiency of pressure relief valve detection, and can use hydrogen as a test medium to ensure laboratory safety while reducing test time.
Smart Images
Figure CN222635793U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of pressure relief valve detection, and in particular, to a pressure relief valve detection device. Background Art
[0002] The hydrogen fuel cell system pressure relief valve is a pressure relief protection valve body module installed on the anode inlet side of the fuel cell system. Its main function is to automatically relieve pressure when the valve body detects that the anode pressure of the fuel cell system exceeds the required limit, and discharge the anode hydrogen to the tail exhaust, effectively preventing the fuel cell system from being damaged due to excessive pressure difference between the cathode and cathode or the pressure on the anode side exceeding the pressure of the proton exchange membrane during operation. The pressure relief valve needs to be opened and returned to the seat pressure test before it is put into use. It can only be produced, installed and put into use after passing the test.
[0003] like Figure 1 As shown, some pressure relief valve detection devices in the prior art include: a test bench 1, a valve 2, a pressure sensor 3, a pressure relief valve 4 and a water container 5. The test method is: the pressure relief valve is opened and the seat return pressure (action is achieved by the inlet and outlet pressure difference). The test method is to rely on the test bench to provide the test gas medium, the gas source is connected to the gas inlet of the pressure relief valve, and the outlet connection pipeline of the pressure relief valve is immersed in water or directly immersed in water. By gradually and slowly increasing the gas source pressure until bubbles are generated in the water container, stop the gas supply, and record the pressure value at the front end of the pressure relief valve inlet, which is the pressure relief valve opening pressure. When the bubbles completely disappear, record the pressure value at the front end of the pressure relief valve inlet, which is the pressure relief valve seat return pressure. This test process needs to be measured multiple times to ensure that the test error is reduced.
[0004] The above detection method is time-consuming, and the test process records the valve body opening and re-seat pressure test by visually observing the generation and disappearance of bubbles. Although repeated measurements are made to avoid errors as much as possible, the data accuracy is not high. Utility Model Content
[0005] The present application provides a pressure relief valve detection device to solve the problems of large pressure relief valve detection error and long test time in the prior art.
[0006] A pressure relief valve detection device provided according to the present application includes: a first pipeline, a first pressure tester, a second pipeline, a second pressure tester, a first valve and a vacuum pump; the outlet of the first pipeline is used to be connected to the inlet of the pressure relief valve, the pressure sensor of the first pressure tester is arranged on the first pipeline, the inlet of the second pipeline is used to be connected to the outlet of the pressure relief valve, the outlet of the second pipeline is connected to the outlet of the first valve, the pressure sensor of the second pressure tester is arranged on the second pipeline, and the inlet of the vacuum pump is connected to the outlet of the first valve.
[0007] Furthermore, the pressure relief valve detection device also includes a vacuum box, which is arranged on the second pipeline, the inlet of the vacuum box is used to be connected to the outlet of the pressure relief valve, the outlet of the vacuum box is connected to the inlet of the first valve, and the pressure sensor of the second pressure tester is arranged on the vacuum box.
[0008] Furthermore, the length of the second pipeline is between 2 and 7 times the diameter of the pressure relief valve.
[0009] Furthermore, the side length of the vacuum box is 3 to 9 times the diameter of the pressure relief valve.
[0010] Furthermore, the pressure relief valve detection device also includes a second valve, and an outlet of the second valve is connected to an inlet of the first pipeline.
[0011] Furthermore, both the first valve and the second valve are solenoid valves.
[0012] Furthermore, the outlet of the vacuum pump is communicated with the inlet of the exhaust line.
[0013] Furthermore, the pressure relief valve detection device also includes a third pipeline, and the first valve is connected to the vacuum pump through the third pipeline.
[0014] Furthermore, the pressure relief valve detection device also includes an air supply device, and the outlet of the air supply device is connected to the inlet of the first pipeline.
[0015] Furthermore, the pressure relief valve detection device also includes a fourth pipeline, and the outlet of the gas supply equipment is connected to the inlet of the first pipeline through the fourth pipeline.
[0016] When using the technical solution of the present application, the first valve is opened, and then the second pipeline is evacuated by a vacuum pump, and then the first valve is closed, and the pressure of the second pressure tester is recorded. The first pipeline is connected to the gas source, and when the pressure of the second pressure tester changes, the pressure of the first pressure tester is recorded, and the opening pressure of the pressure relief valve can be obtained by calculation. The test of the opening pressure of the pressure relief valve by the above-mentioned device is highly efficient and the test is relatively accurate. The technical solution of the present application effectively solves the problems of large detection error and long test time of the pressure relief valve in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] 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.
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0019] Figure 1 A schematic diagram of the process structure of a pressure relief valve detection device in the prior art is shown;
[0020] Figure 2 A schematic diagram of the process structure of a pressure relief valve detection device according to an embodiment of the present application is shown.
[0021] The above drawings include the following reference numerals:
[0022] 10. First pipeline; 20. First pressure tester; 30. Second pipeline; 40. Second pressure tester; 50. First valve; 60. Vacuum pump; 70. Vacuum box; 80. Second valve; 90. Exhaust pipeline; 100. Third pipeline; 110. Gas supply equipment; 120. Fourth pipeline; 200. Pressure relief valve. DETAILED DESCRIPTION
[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.
[0026] like Figure 2As shown, the pressure relief valve detection device of this embodiment includes: a first pipeline 10, a first pressure tester 20, a second pipeline 30, a second pressure tester 40, a first valve 50 and a vacuum pump 60. The outlet of the first pipeline 10 is used to be connected to the inlet of the pressure relief valve 200, the pressure sensor of the first pressure tester 20 is arranged on the first pipeline 10, the inlet of the second pipeline 30 is used to be connected to the outlet of the pressure relief valve 200, the outlet of the second pipeline 30 is connected to the outlet of the first valve 50, the pressure sensor of the second pressure tester 40 is arranged on the second pipeline 30, and the inlet of the vacuum pump 60 is connected to the outlet of the first valve 50.
[0027] When using the technical solution of this embodiment, the first valve 50 is opened, and then the second pipeline 30 is vacuumed by the vacuum pump 60, and then the first valve 50 is closed, and the pressure of the second pressure tester 40 is recorded. The first pipeline 10 is connected to the gas source. When the pressure of the second pressure tester 40 changes, the pressure of the first pressure tester 20 is recorded, and the opening pressure of the pressure relief valve 200 can be obtained by calculation. The test of the opening pressure of the pressure relief valve 200 by the above device is efficient and accurate. The technical solution of this embodiment effectively solves the problems of large detection error and long test time of the pressure relief valve in the prior art.
[0028] It should be noted that the pressure tested by the second pressure tester 40 is the stable pressure. The return seat pressure can also be tested by the pressure relief valve detection device of this embodiment, and the test steps are described in detail below. The test efficiency can be improved by vacuuming with the vacuum pump 60. It should be noted that the inlet and outlet of the present application refer to the measurement of the open state of the pressure relief valve, that is, positive ventilation. When testing the return seat pressure, the inlet of the present application is the outlet, and the outlet is the inlet, which will not be repeated here.
[0029] like Figure 2 As shown, in the technical solution of this embodiment, the pressure relief valve detection device also includes a vacuum box 70. The vacuum box 70 is arranged on the second pipeline 30, the inlet of the vacuum box 70 is used to be connected to the outlet of the pressure relief valve 200, the outlet of the vacuum box 70 is connected to the inlet of the first valve 50, and the pressure sensor of the second pressure tester 40 is arranged on the vacuum box 70. The arrangement of the vacuum box 70 improves the anti-interference ability of the second pressure tester 40, that is, the second pressure tester 40 is not easily fluctuated due to the gas flow in the second pipeline 30. The vacuum box 70 has the function of gas buffering and improving the anti-interference ability.
[0030] like Figure 2As shown, in the technical solution of this embodiment, the length of the second pipeline 30 is between 2 and 7 times the diameter of the pressure relief valve 200. In this way, the second pipeline 30 is easy to set up the vacuum box 70 and is convenient to operate. It should be noted that if the length of the second pipeline 30 is too short, it is not convenient to set up the vacuum box 70, and if it is too long, it will affect the test accuracy. In the technical solution of this embodiment, a relationship of 5 times is adopted, for example, the diameter of the pressure relief valve 200 is 10 mm, and the length of the second pipeline 30 is 50 mm.
[0031] like Figure 2 As shown, in the technical solution of this embodiment, the side length of the vacuum box 52 is 3 to 9 times the diameter of the pressure relief valve 200. The vacuum box 70 of such a size has a better anti-interference ability on the one hand, and on the other hand avoids the inaccurate test of the second pressure tester 40 caused by the excessive volume of the vacuum box 70. It should be noted that the length of the vacuum box 70 is between 1 / 4 and 2 / 3 of the length of the second pipeline 30.
[0032] In the technical solution of this embodiment, the second valve 80 and the first valve 50 are both solenoid valves. The above structure facilitates automatic control, and the switch of the solenoid valve is more accurate. Of course, the second valve 80 and the first valve 50 can also be set as manual valves according to needs, or the second valve 80 is a solenoid valve and the first valve 50 is a manual valve, or the second valve 80 is a manual valve and the first valve 50 is a solenoid valve.
[0033] In the technical solution of the present embodiment, the pressure relief valve detection device further includes a second valve 80, and the outlet of the second valve 80 is connected to the inlet of the first pipeline 10. The pressure relief valve 200 is connected to the first pipeline 10 and the second pipeline 30 by a quick buckle. The connection mode of the pressure relief valve 200 to the first pipeline 10 and the second pipeline 30 improves the test efficiency. According to the test data, the pressure relief valve 200 is connected to the first pipeline 10 and the second pipeline 30 by a quick buckle, which is at least 20% higher than the test efficiency of the pressure relief valve 200 to the first pipeline 10 and the second pipeline 30. In the technical solution of the present embodiment, three claws are provided on the first pipeline 10. When the first pipeline 10 is buckled with the pressure relief valve 200, it is only necessary to pull the three claws to achieve the sealed connection between the first pipeline 10 and the pressure relief valve 200. Similarly, three claws are also provided on the second pipeline 30. When the second pipeline 30 is connected to the pressure relief valve 200, the connection between the second pipeline 30 and the pressure relief valve 200 can be achieved by pulling the three claws.
[0034] like Figure 2As shown, in the technical solution of this embodiment, the outlet of the vacuum pump 60 is connected to the inlet of the evacuation pipeline 90. Such a structure is beneficial to environmental protection on the one hand, and on the other hand, the pressure relief valve detection device can use the required gas to perform experiments as needed, for example, hydrogen can be used for experiments in this embodiment. It should be noted that the evacuation pipeline 90 is led to the outside of the laboratory or to gas processing equipment.
[0035] like Figure 2 As shown, in the technical solution of this embodiment, the pressure relief valve detection device also includes a third pipeline 100, and the first valve 50 is connected to the vacuum pump 60 through the third pipeline 100. The setting of the third pipeline 100 makes the setting of the vacuum pump 60 more flexible and convenient. If there is no third pipeline 100, the vacuum pump 60 and the first valve 50 can be directly connected through a flange.
[0036] like Figure 2 As shown, in the technical solution of this embodiment, the pressure relief valve detection device also includes a gas supply device 110, and the gas supply device 110 is connected to the second valve 80. The gas supply device 110 provides a continuous gas source for the pressure relief valve detection device. The gas supply device 110 can provide gases such as hydrogen, nitrogen or air as needed.
[0037] like Figure 2 As shown, in the technical solution of this embodiment, the pressure relief valve detection device further includes a fourth pipeline 120, and the fourth pipeline 120 is connected between the gas supply device 110 and the second valve 80. The arrangement of the fourth pipeline 120 makes the arrangement of the gas supply device 110 more flexible.
[0038] The following is a detailed calculation formula to illustrate the use of the device:
[0039] Install the pressure relief valve 200, keep the second valve 80 and the first valve 50 open, start the vacuum pump 60, make the vacuum box 70 and the rear pipeline (second pipeline 30) of the pressure relief valve 200 in a vacuum state, wait for the indication of the second pressure tester 40 to stabilize (value: U1), and close the first valve 50. The test bench (gas supply equipment 110) supplies hydrogen medium (cancels the test medium that can only use nitrogen or air in traditional tests), slowly increases the pressure, and after the indication of the pressure sensor (second pressure tester 40) changes, it automatically feeds back to the test bench, the test bench stops supplying gas and automatically records the indication of the pressure sensor (first pressure tester 20) (value: U2), and it is concluded that the opening pressure of the pressure relief valve 200 is: U=U2-U1+P0; P0 is the atmospheric pressure. When the indication of the pressure sensor (second pressure tester 40) is stable and no longer changes, it is automatically fed back to the test bench, and the first pressure tester 20 (value: U2') and the second pressure tester 40 (value: U1') are automatically recorded at this time, and the return seat pressure of the pressure relief valve 200 is obtained as follows: U'=U2'-U1'+P0 (pressure difference on both sides of the pressure relief valve). After the test is completed, the second valve 80 and the first valve 50 are opened, and the test bench switches to nitrogen or air to purge the connection device. The test medium hydrogen is emptied with the test bench and discharged out of the laboratory, and the test is completed.
[0040] The technical solution of this application has the following beneficial effects:
[0041] ① Changing from the traditional method of observing bubbles with naked eyes to automatic detection by instruments and equipment to improve the accuracy and authenticity of test data;
[0042] ② The traditional bubble method observation record requires multiple tests to reduce test errors. The tests of this invention are all instrument monitoring tests. The test data is true and valid once passed, which improves the test efficiency;
[0043] ③ The traditional bubble method cannot be tested with hydrogen as a medium, because hydrogen produces bubbles that are discharged into the laboratory, which is a hydrogen leakage incident and endangers laboratory safety. Only nitrogen or air can be used for testing. The test method and device of this application can directly use hydrogen as a medium for testing, and directly exhaust it after the test is completed, which not only ensures the consistency of the test gas with the anode gas during the operation of the actual fuel cell system (eliminating the error of other gas medium tests), but also ensures the safety of the laboratory;
[0044] ④ The vacuum box in the structure can also be replaced by a sealing device and the vacuum pump can be eliminated. However, since the pressure is slowly increased during the experiment, the use of a vacuum pump for single-side negative pressure can save test time while maintaining the consistency of the outlet pressure value during each test (the normal pressure value has a certain fluctuation).
[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A pressure relief valve detection device, characterized in that: include: A first pipeline (10), a first pressure tester (20), a second pipeline (30), a second pressure tester (40), a first valve (50) and a vacuum pump (60); The outlet of the first pipeline (10) is used to be connected to the inlet of the pressure relief valve (200), the pressure sensor of the first pressure tester (20) is arranged on the first pipeline (10), the inlet of the second pipeline (30) is used to be connected to the outlet of the pressure relief valve (200), the outlet of the second pipeline (30) is connected to the outlet of the first valve (50), the pressure sensor of the second pressure tester (40) is arranged on the second pipeline (30), and the inlet of the vacuum pump (60) is connected to the outlet of the first valve (50).
2. The pressure relief valve detection device according to claim 1, characterized in that: The pressure relief valve detection device further comprises a vacuum box (70), wherein the vacuum box (70) is arranged on the second pipeline (30), the inlet of the vacuum box (70) is used to communicate with the outlet of the pressure relief valve (200), the outlet of the vacuum box (70) is connected with the inlet of the first valve (50), and the pressure sensor of the second pressure tester (40) is arranged on the vacuum box (70).
3. The pressure relief valve detection device according to claim 1, characterized in that: The length of the second pipeline (30) is between 2 and 7 times the diameter of the pressure relief valve (200).
4. The pressure relief valve detection device according to claim 1, characterized in that: The pressure relief valve detection device further comprises a second valve (80), the outlet of the second valve (80) being connected to the inlet of the first pipeline (10).
5. The pressure relief valve detection device according to claim 4, characterized in that: The second valve (80) and the first valve (50) are both solenoid valves.
6. The pressure relief valve detection device according to any one of claims 1 to 5, characterized in that: The outlet of the vacuum pump (60) is connected to the inlet of the exhaust pipeline (90).
7. The pressure relief valve detection device according to claim 6, characterized in that: The pressure relief valve detection device further comprises a third pipeline (100), and the first valve (50) is connected to the vacuum pump (60) via the third pipeline (100).
8. The pressure relief valve detection device according to claim 6, characterized in that: The pressure relief valve detection device further comprises an air supply device (110), wherein an outlet of the air supply device (110) is connected to an inlet of the first pipeline (10).
9. The pressure relief valve detection device according to claim 8, characterized in that: The pressure relief valve detection device further comprises a fourth pipeline (120), and the outlet of the gas supply device (110) is connected to the inlet of the first pipeline (10) through the fourth pipeline (120).