Safety valve test tool

Abstract

The invention provides a safety valve test tool. The safety valve testing tool comprises a testing platform, a support, a testing boss and a lifting fixing assembly. Meanwhile, the supporting seat is arranged on the testing platform and provided with a testing air inlet, only the testing boss is arranged on the supporting seat, a testing air outlet is formed in the upper end of the testing boss and communicated with the testing air inlet, the diameter of the testing boss is gradually increased from top to bottom, and a plurality of annular air bags are arranged on the peripheral surface of the testing boss; the multiple annular air bags are arranged at intervals in the vertical direction. An air bag air inlet is formed in the peripheral surface of the test boss, and the air bag air inlet is communicated with a plurality of annular air bags; the lifting fixing assembly is arranged on the supporting seat, the lifting fixing assembly comprises a first fixing plate and a lifting assembly, a first through hole is formed in the first fixing plate, the testing boss penetrates through the first through hole, and the lifting assembly is arranged between the first fixing plate and the testing platform.

Description

Technical Field

[0001] This invention belongs to the field of safety valve testing technology, and specifically relates to a safety valve testing fixture. Background Technology

[0002] In industrial production, safety valves are key components for ensuring the safety of pressure equipment, and their performance testing is crucial. Traditional safety valve testing requires simulating actual working conditions and accurately measuring parameters such as set pressure, reseating pressure, and sealing performance.

[0003] To achieve this goal, the testing fixture needs to construct a stable gas path system to achieve precise gas delivery and pressure control, while ensuring that the safety valve is securely installed and reliably sealed during the testing process. With the diversification of safety valve specifications in the industrial field, the existing safety valve testing fixtures still have the following shortcomings in use: the gas delivery structure at the inlet end is mostly a fixed design, which can only match the gas inlet of a single size safety valve. When facing safety valves of different nominal diameters or specifications from different manufacturers, it is necessary to frequently replace the gas delivery connectors or even the entire fixture. Moreover, the sealing performance is unstable, which not only increases the cost of equipment procurement and maintenance, but also seriously reduces the testing efficiency.

[0004] Therefore, safety valve testing fixtures in related technologies have the problem of being difficult to adapt to safety valves of different specifications. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a safety valve testing fixture.

[0006] The safety valve testing fixture of this invention includes: Test platform A support base is provided on the test platform, and the support base has a test air inlet. A test boss is provided on the support base, and a test air outlet is provided at the upper end of the test boss. The test air outlet is connected to the test air inlet. The diameter of the test boss gradually increases from top to bottom, and multiple annular airbags are provided on the outer peripheral surface of the test boss. The multiple annular airbags are spaced apart in the vertical direction. The outer peripheral surface of the test boss is provided with an airbag inlet, which is connected to multiple annular airbags. A lifting and fixing assembly is provided on the support base. The lifting and fixing assembly includes a first fixing plate and a lifting assembly. The first fixing plate is provided with a first through hole. The test boss passes through the first through hole. The lifting assembly is located between the first fixing plate and the test platform.

[0007] To facilitate the mounting of the safety valve, multiple mounting holes can be provided on the first mounting plate, which can also meet the connection requirements of safety valves of different specifications. These mounting holes can be adapted to safety valves of different sizes, thereby improving the versatility of the tooling. Operators only need to align the safety valve with the appropriate mounting hole position to quickly complete the installation, significantly reducing preparation time.

[0008] It is understandable that by gradually increasing the diameter of the test boss from top to bottom, it can accommodate safety valves of different diameters. For example, when a safety valve needs to be tested, the first fixing plate is moved to a position where the test boss has the same diameter as the safety valve to be tested using the lifting assembly, so that the safety valve testing fixture of this embodiment can accommodate a variety of different specifications of safety valves; then the safety valve is fixed on the first fixing plate, and the test boss extends into the air inlet of the safety valve. Then, air is supplied to the annular air bladder through the air supply port. The annular air bladder expands to further fill the gap between the test boss and the safety valve, avoiding air leakage between the test boss and the safety valve.

[0009] Therefore, the safety valve testing fixture of this invention can adapt to a variety of safety valves of different specifications.

[0010] In some embodiments, the safety valve testing fixture of the present invention further includes a gas storage tank, the gas storage tank being provided with a gas storage supply port, the gas storage supply port being connected to the test air inlet, and the gas storage supply port being connected to the airbag air inlet.

[0011] In some embodiments, the safety valve testing fixture of the present invention further includes a distributor, the distributor having a distribution inlet, a first distribution outlet and a second distribution outlet, the first distribution outlet being connected to the distribution inlet and the second distribution outlet being connected to the distribution inlet; The distribution inlet is connected to the gas storage and supply port; the first distribution outlet is connected to the airbag inlet; and the second distribution outlet is connected to the test inlet.

[0012] In some embodiments, the first distribution outlet is connected to a first air pipe, which is provided with a first valve; the second distribution outlet is connected to a second air pipe, which is provided with a second valve and a pressure gauge.

[0013] In some embodiments, the lifting assembly includes a first fixed cylinder and a first sliding rod. The first fixed cylinder is disposed on the support base, and the first sliding rod is slidably disposed inside the first fixed cylinder, with the upper end of the first sliding rod connected to the first fixed plate.

[0014] In some embodiments, the side wall of the first fixed cylinder is provided with a waist-shaped hole, which extends in the vertical direction; the lifting assembly further includes a first bolt, which passes through the waist-shaped hole and is connected to the first sliding rod.

[0015] In some embodiments, the safety valve testing fixture of the present invention further includes an outlet fixing component, which is disposed on the test platform and includes a second fixing plate, on which a third air pipe is passed.

[0016] In some embodiments, the air outlet fixing assembly further includes a guide rail, a slider, a lifting rod, and a second fixing plate. The guide rail is mounted on the test platform, the slider is slidably mounted on the guide rail, the lifting rod is mounted on the slider, and the third air pipe is located at the upper end of the lifting rod.

[0017] In some embodiments, the lifting rod includes a second fixed cylinder and a second sliding rod, the second fixed cylinder is disposed on the slider, the lower end of the second sliding rod is slidably disposed inside the second fixed cylinder, and the third air pipe is disposed at the upper end of the second sliding rod.

[0018] In some embodiments, the safety valve testing fixture of the present invention further includes a control panel and a control bracket. The control bracket is disposed on the test platform, and the control panel is disposed on the control bracket. The pressure gauge, the first valve, and the second valve are all signal connected to the control panel. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of the safety valve testing fixture in an embodiment of the present invention.

[0020] Figure 2 This is the second schematic diagram of the safety valve testing fixture in an embodiment of the present invention.

[0021] Icon labels: 1. Testing platform; 2. Support base; 201. Test air inlet 3. Test boss; 301. Test air outlet; 302. Airbag inlet; 4. Circular airbag; 5. Lifting and fixing assembly; 501. First fixing plate; 5011. First through hole; 502, Lifting assembly; 5021, First fixed cylinder; 50211, Waist-shaped hole; 5022, First sliding rod; 6. Gas storage tank; 601. Gas supply port; 7. Distributor; 701. Distributor inlet; 702. First distributor outlet; 703. Second distributor outlet; 8. First trachea; 801. First valve; 9. Second air pipe; 901. Second valve; 902. Pressure gauge; 10. Air outlet fixing assembly; 11. Second fixing plate; 12. Third air pipe; 14. Guide rail; 15. Slider; 16. Lifting rod; 161. Second fixed cylinder; 162. Second sliding rod; 17. Control panel; 18. Control bracket; 19. First bolt; 20. Second bolt. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] This invention provides a safety valve testing fixture. The safety valve testing fixture of this embodiment includes a testing platform, a support, a testing boss 3, and a lifting and fixing assembly 5.

[0024] like Figure 1 and Figure 2 As shown, the test platform has a plate-like structure and can serve as a carrier for other components of the safety test fixture in this embodiment of the invention.

[0025] Meanwhile, the support base 2 is set on the test platform. The support base 2 has a test air inlet 201. Only the test boss 3 is set on the support base 2. The upper end of the test boss 3 is provided with a test air outlet 301. The test air outlet 301 is connected to the test air inlet 201. In order to facilitate the connection between the test air inlet 201 and the test air outlet 301, both the support base 2 and the test boss 3 can be set as hollow structures so as to set up the pipeline connecting the test air inlet 201 and the test air outlet 301.

[0026] Meanwhile, the diameter of the test boss 3 gradually increases from top to bottom, and multiple annular airbags 4 are provided on the outer peripheral surface of the test boss 3. The multiple annular airbags 4 are spaced apart in the vertical direction. An airbag inlet 302 is provided on the outer peripheral surface of the test boss 3, and the airbag inlet 302 is connected to the multiple annular airbags 4. It is understood that the airbag inlet 302 and the multiple annular airbags 4 can be connected by a pipeline.

[0027] The lifting and fixing assembly 5 is mounted on the support base 2. The lifting and fixing assembly 5 includes a first fixing plate 501 and a lifting assembly 502. The first fixing plate 501 is provided with a first through hole 5011. The test boss 3 passes through the first through hole 5011. The lifting assembly 502 is located between the first fixing plate 501 and the test platform.

[0028] To facilitate the mounting of safety valves, the first mounting plate 501 can be equipped with multiple mounting holes, which can also meet the connection requirements of safety valves of different specifications. These mounting holes can be adapted to safety valves of different sizes, thereby improving the versatility of the tooling. Operators only need to align the safety valve with the appropriate mounting hole position to quickly complete the installation, significantly reducing preparation time.

[0029] It is understandable that by gradually increasing the diameter of the test boss 3 from top to bottom, it can accommodate safety valves of different diameters. For example, when a safety valve needs to be tested, the first fixing plate 501 is moved to a position where the test boss 3 has the same diameter as the safety valve to be tested by the lifting assembly 502, so that the safety valve testing fixture of this embodiment can accommodate a variety of safety valves of different specifications; then the safety valve is fixed on the first fixing plate 501, and the test boss 3 extends into the air inlet of the safety valve. Then, air is supplied to the annular airbag 4 through the air supply port. The annular airbag 4 expands to further fill the gap between the test boss 3 and the safety valve, avoiding air leakage between the test boss 3 and the safety valve.

[0030] Therefore, the safety valve testing fixture of this invention can adapt to a variety of safety valves of different specifications.

[0031] In some embodiments, the safety valve testing fixture of the present invention further includes a gas storage tank 6, which is provided with a gas storage supply port 601. The gas storage supply port 601 is connected to the test air inlet 201 and is also connected to the airbag air inlet 302.

[0032] It is understood that the safety valve testing fixture of this embodiment of the invention, by setting up the gas storage tank 6, can provide a sufficient test gas source for the safety valve testing fixture of this embodiment of the invention, so as to facilitate the testing of the safety valve testing fixture of this embodiment of the invention.

[0033] In some embodiments, the safety valve testing fixture of the present invention further includes a distributor 7, which has a distribution inlet 701, a first distribution outlet 702 and a second distribution outlet 703. The first distribution outlet 702 is connected to the distribution inlet 701, and the second distribution outlet 703 is connected to the distribution inlet 701. The distribution inlet 701 is connected to the gas storage supply port 601. The first distribution outlet 702 is connected to the airbag inlet 302. The second distribution outlet 703 is connected to the test air inlet 201.

[0034] It is understood that the safety valve testing fixture of this embodiment of the invention, by setting a distributor 7, can divide the gas coming out of the gas storage supply port 601 into two paths, one going to the airbag inlet 302 and the other going to the test inlet 201, so that the parameters of the gas going to the airbag inlet 302 and the test outlet 301 can be controlled separately, thereby improving the convenience of the safety valve testing fixture of this embodiment of the invention.

[0035] In some embodiments, the first distribution outlet 702 is connected to the first air pipe 8, and the first air pipe 8 is provided with a first valve 801; the second distribution outlet 703 is connected to the second air pipe 9, and the second air pipe 9 is provided with a second valve 901 and a pressure gauge 902.

[0036] Preferably, both the first valve 801 and the second valve 901 are solenoid valves; preferably, the pressure gauge 902 is a pneumatic gauge.

[0037] Understandably, by setting the first valve 801, the second valve 901, and the pressure gauge 902, the gas flow to the airbag inlet 302 and the test inlet 201 can be controlled and monitored respectively. This not only improves the accuracy of operation but also effectively avoids test errors that may be caused by unstable gas parameters. At the same time, the pressure gauge provides an intuitive reference for real-time monitoring of gas pressure, ensuring the safety and reliability of the testing process.

[0038] In practical applications, this design significantly improves testing efficiency. Precise control of the solenoid valve allows for rapid adjustment of gas parameters to meet diverse testing needs. Simultaneously, the pressure gauge readings help operators adjust parameters promptly, ensuring the testing environment remains ideal.

[0039] In some embodiments, the lifting assembly 502 includes a first fixed cylinder 5021 and a first sliding rod 5022. The first fixed cylinder 5021 is disposed on the support base 2, and the first sliding rod 5022 is slidably disposed inside the first fixed cylinder 5021, and the upper end of the first sliding rod 5022 is connected to the first fixed plate 501.

[0040] like Figure 2 As shown, there are four lifting components 502, which are respectively located at the four corners of the support base 2.

[0041] Understandably, the four lifting components 502 are distributed at the four corners of the support base 2, which further ensures uniform force distribution and avoids equipment deformation or test errors caused by local stress concentration, thus providing a more reliable guarantee for safety valve testing.

[0042] Meanwhile, by setting the lifting assembly 502 to include a first fixed cylinder 5021 and a first sliding rod 5022, it is convenient to move the first fixed plate 501 to a position where the test boss 3 has the same diameter as the safety valve to be tested by moving the first sliding rod 5022, so that the safety valve testing fixture of the present invention can be further adapted to a variety of different specifications of safety valves.

[0043] Furthermore, the cooperative design of the first fixed cylinder 5021 and the first sliding rod 5022 can effectively improve the stability of the overall structure. In actual operation, by adjusting the extension length of the first sliding rod 5022, the height of the first fixed plate 501 can be flexibly changed to meet different testing requirements.

[0044] In some embodiments, the side wall of the first fixed cylinder 5021 is provided with a waist-shaped hole 50211, which extends in the vertical direction; the lifting assembly 502 also includes a first bolt 19, which passes through the waist-shaped hole 50211 and is connected to the first sliding rod 5022.

[0045] When it is necessary to move the first sliding rod 5022, loosen the first bolt 19 to move the first sliding rod 5022; when it is necessary to fix the first sliding rod 5022, tighten the first bolt 19 to fix the first sliding component, thereby greatly improving the convenience of adjusting the lifting assembly 502.

[0046] Meanwhile, the design of the oblong hole 50211 not only enhances the flexibility of the first sliding rod 5022, but also enables more precise position adjustment within a certain range. In this way, operators can quickly change the height of the first fixed plate 501 according to actual needs, thereby adapting to the testing requirements of safety valves of different specifications.

[0047] In some embodiments, the safety valve testing fixture of the present invention further includes an outlet fixing component 10, which is disposed on the testing platform. The outlet fixing component 10 includes a second fixing plate 11, and a third air pipe 12 is provided on the second fixing plate 11.

[0048] To facilitate the mounting of the safety valve, the second mounting plate 11 can be provided with multiple mounting holes. These mounting holes can accommodate safety valves of different sizes, thereby improving the versatility of the tooling. Operators only need to align the safety valve with the appropriate mounting hole position to quickly complete the installation, significantly reducing preparation time.

[0049] It is understood that the safety valve testing fixture of the present invention can further fix the safety valve to be tested by setting the gas outlet fixing component 10, so as to avoid the safety valve to be tested from becoming loose, thereby improving the safety of the testing process. At the same time, during the test, the gas flowing out of the safety valve can be discharged through the third gas pipe 12.

[0050] Furthermore, the gas outlet fixing component 10 can effectively guide the gas flow direction and prevent the gas from spreading disorderly in the testing environment. At the same time, the third gas pipe 12 not only facilitates the collection of the discharged gas, but also allows connection to an external recovery or treatment device, thereby further improving the environmental friendliness and safety of the entire testing process.

[0051] In some embodiments, the air outlet fixing assembly 10 further includes a guide rail 14, a slider 15, a lifting rod 16, and a second fixing plate 11. The guide rail 14 is disposed on the test platform, the slider 15 is slidably disposed on the guide rail 14, the lifting rod 16 is disposed on the slider 15, and the third air pipe 12 is disposed at the upper end of the lifting rod 16.

[0052] It is understandable that by sliding the slider 15 on the guide rail 14, the position of the third air pipe 12 and the second fixed plate 11 can be flexibly adjusted. Combined with the design of the lifting rod 16, the height of the third air pipe 12 and the second fixed plate 11 can be adjusted to accommodate safety valves of different specifications.

[0053] This invention not only enhances the versatility of the safety valve testing fixture but also significantly improves operational convenience. In practical applications, users can quickly adjust the position and height of the outlet fixing component 10 according to the specific dimensions and interface location of the safety valve under test, thereby achieving more precise docking. Furthermore, the cooperation between the guide rail 14 and the slider 15 ensures stability during movement.

[0054] In some embodiments, the lifting rod 16 includes a second fixed cylinder 161 and a second sliding rod 162. The second fixed cylinder 161 is disposed on the slider 15, the lower end of the second sliding rod 162 is slidably disposed inside the second fixed cylinder 161, and the third air pipe 12 is disposed at the upper end of the second sliding rod 162.

[0055] It is understandable that a second bolt 20 can also be installed in the second fixing hole. The second bolt 20 passes through the side wall of the second fixing cylinder 161 and abuts against the second sliding rod 162, thereby achieving the effect of fixing the second sliding rod 162. At the same time, when it is necessary to move the second sliding rod 162, the second bolt 20 can be loosened, making the height adjustment of the lifting rod 16 more convenient and stable.

[0056] In actual operation, users can quickly adjust the position of the third air pipe 12 and the second fixed plate 11 according to the specific size of the safety valve through the lifting rod 16, thereby ensuring the efficiency and accuracy of the testing process.

[0057] In some embodiments, the safety valve testing fixture of the present invention further includes a control panel 17 and a control bracket 18. The pressure gauge 902, the first valve 801 and the second valve 901 are all connected to the control panel 17 via signal connection. The control bracket 18 is disposed on the test platform, and the control panel 17 is disposed on the control bracket 18.

[0058] By connecting pressure gauge 902, first valve 801, and second valve 901 to control panel 17, data from pressure gauge 902 can be transmitted to control panel 17, allowing operators to refer to the data from pressure gauge 902 to test the safety valve and improve testing accuracy. Furthermore, operators can adjust first valve 801 and second valve 901 through control panel 17, improving the ease of adjustment.

[0059] Meanwhile, the control panel 17 is equipped with a display screen and operation buttons. The display screen is used to display the data of pressure gauge 902 in real time, and the operation buttons make it convenient for the staff to make precise adjustments to the first valve 801 and the second valve 901.

[0060] In addition, the control panel 17 is detachably mounted on the control bracket 18, which makes it easy for staff to disassemble the control panel 17. When remote operation is required, the control panel 17 can be disassembled for operation.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety valve testing fixture, characterized in that, include: Test platform A support base is provided on the test platform, and the support base has a test air inlet. A test boss is provided on the support base, and a test air outlet is provided at the upper end of the test boss. The test air outlet is connected to the test air inlet. The diameter of the test boss gradually increases from top to bottom, and multiple annular airbags are provided on the outer peripheral surface of the test boss. The multiple annular airbags are spaced apart in the vertical direction. The outer peripheral surface of the test boss is provided with an airbag inlet, which is connected to multiple annular airbags. A lifting and fixing assembly is provided on the support base. The lifting and fixing assembly includes a first fixing plate and a lifting assembly. The first fixing plate is provided with a first through hole. The test boss passes through the first through hole. The lifting assembly is located between the first fixing plate and the test platform.

2. The safety valve testing fixture according to claim 1, characterized in that, It also includes a gas storage tank, which is provided with a gas supply port. The gas supply port is connected to the test air inlet and the gas supply port is connected to the airbag air inlet.

3. The safety valve testing fixture according to claim 2, characterized in that, It also includes a distributor having a distribution inlet, a first distribution outlet and a second distribution outlet, the first distribution outlet being connected to the distribution inlet and the second distribution outlet being connected to the distribution inlet; The distribution inlet is connected to the gas storage and supply port; the first distribution outlet is connected to the airbag inlet; and the second distribution outlet is connected to the test inlet.

4. The safety valve testing fixture according to claim 3, characterized in that, The first distribution outlet is connected to a first air pipe, which is equipped with a first valve; the second distribution outlet is connected to a second air pipe, which is equipped with a second valve and a pressure gauge.

5. The safety valve testing fixture according to claim 1, characterized in that, The lifting assembly includes a first fixed cylinder and a first sliding rod. The first fixed cylinder is disposed on the support base, and the first sliding rod is slidably disposed inside the first fixed cylinder, with the upper end of the first sliding rod connected to the first fixed plate.

6. The safety valve testing fixture according to claim 5, characterized in that, The first fixed cylinder has a waist-shaped hole on its side wall, which extends in the vertical direction; the lifting assembly also includes a first bolt, which passes through the waist-shaped hole and is connected to the first sliding rod.

7. The safety valve testing fixture according to claim 1, characterized in that, It also includes an air outlet fixing component, which is disposed on the test platform. The air outlet fixing component includes a second fixing plate, and a third air pipe passes through the second fixing plate.

8. The safety valve testing fixture according to claim 7, characterized in that, The air outlet fixing assembly also includes a guide rail, a slider, a lifting rod, and a second fixing plate. The guide rail is mounted on the test platform, the slider is slidably mounted on the guide rail, the lifting rod is mounted on the slider, and the third air pipe is located at the upper end of the lifting rod.

9. The safety valve testing fixture according to claim 8, characterized in that, The lifting rod includes a second fixed cylinder and a second sliding rod. The second fixed cylinder is disposed on the slider, the lower end of the second sliding rod is slidably disposed inside the second fixed cylinder, and the third air pipe is disposed at the upper end of the second sliding rod.

10. The safety valve testing fixture according to claim 4, characterized in that, It also includes a control panel and a control bracket, the control bracket being mounted on the test platform, the control panel being mounted on the control bracket, and the pressure gauge, the first valve, and the second valve being signal-connected to the control panel.

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