Safety valve test tool

Abstract

The utility model relates to a safety valve test tool. The device comprises an air inlet body which is provided with an air inlet channel which is suitable for being in butt joint with an air inlet part of a safety valve to be tested; the gas outlet body is provided with a gas outlet channel; the air outlet body is provided with an installation through hole suitable for the adjustment rod to pass through, the installation through hole is communicated with the air outlet channel, the installation through hole is suitable for being in butt joint with an air outlet part of the safety valve to be tested, and the adjustment rod passes through the installation through hole and is connected with a spring seat of the safety valve to be tested; the adjusting rod can drive the spring seat to rotate when the adjusting rod rotates so as to adjust the pre-tightening force of the spring and change the setting pressure of the safety valve to be tested. According to the utility model, the pressure can be adjusted in real time in the test process, the operation process is simplified, the tedious steps of repeated disassembly and adjustment are reduced, and the test efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing, in particular to a safety valve testing tool. Background Art

[0002] Spring-loaded safety valves with adjustable set pressures typically adjust their set pressure by changing the position of the spring seat. In the early stages of safety valve development, repeated adjustments to the spring preload are often necessary to achieve the desired set pressure. During testing, the spring seat installed inside the safety valve must be adjusted using a tool. Once the adjustment is complete, the tool is removed and the safety valve is installed in a test line for set pressure testing. This process is cumbersome and inefficient. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problems of complicated operation and low efficiency in the prior art when adjusting the set pressure of a test safety valve.

[0004] In order to solve the above technical problems, the utility model provides a safety valve testing tool, comprising:

[0005] An air inlet is provided with an air inlet passage, wherein the air inlet passage is adapted to be connected to the air inlet portion of the safety valve to be tested;

[0006] Outlet gas, provided with an outlet channel;

[0007] An adjusting rod, the outlet gas is provided with a mounting through hole suitable for the adjusting rod to pass through, the mounting through hole is communicated with the outlet passage, the mounting through hole is suitable for docking with the outlet portion of the safety valve to be tested, the adjusting rod passes through the mounting through hole and is connected to the spring seat of the safety valve to be tested;

[0008] The adjusting rod can drive the spring seat to rotate when the adjusting rod rotates, so as to adjust the spring preload force and change the set pressure of the safety valve to be tested.

[0009] In one embodiment of the present invention, the intake air portion is provided with a first sealing gasket capable of abutting against the intake portion of the safety valve to be tested.

[0010] In one embodiment of the present invention, a first installation groove is radially extended from one end of the installation through hole close to the safety valve to be tested, and a second sealing gasket capable of abutting against the air outlet of the safety valve to be tested is installed in the first installation groove.

[0011] In one embodiment of the present invention, the center hole of the sealing gasket is clearance-matched with the adjusting rod.

[0012] In one embodiment of the present invention, the mounting through hole is provided with an air inlet groove, and the axial ends of the air inlet groove respectively extend to the gap between the central hole of the sealing gasket and the adjusting rod and the air outlet channel.

[0013] In one embodiment of the present invention, a second mounting groove is radially extended from one end of the mounting through hole away from the safety valve to be tested, and an air seal in sealing contact with the adjusting rod is installed in the second mounting groove.

[0014] In one embodiment of the present invention, a cover plate is installed on the outer wall of the gas outlet on the axial side of the second mounting groove, and a first limiting step facing the inner side of the mounting through hole is formed between the center hole of the cover plate and the gas seal, and the side wall of the adjustment rod is provided with a second limiting step that cooperates with the first limiting step.

[0015] In one embodiment of the present invention, a toggle clamp is further included, and the toggle clamp is used to abut the safety valve to be tested between the gas inlet and the gas outlet.

[0016] In one embodiment of the present invention, it also includes a mounting plate and a support plate arranged on the mounting plate and used to support the safety valve to be tested, the gas inlet is slidably connected to the mounting plate, and the gas outlet and the elbow clamp are fixedly connected to the mounting plate.

[0017] In one embodiment of the present invention, a slide groove is provided on the mounting plate, and a sliding member that slides in the slide groove is installed on the bottom of the air inlet.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] The safety valve testing tool described in the utility model directly adjusts the preload force of the spring through the adjustment rod, thereby changing the set pressure of the safety valve, and can adjust the pressure in real time during the test, which simplifies the operation process, reduces the tedious steps of repeated disassembly and adjustment, and greatly improves the test efficiency.

[0020] The utility model adopts an elbow clamp to fix the safety valve to be tested, which can quickly clamp the safety valve between the first sealing gasket and the second sealing gasket, and can be quickly disassembled after the test is completed without the need for complicated tools and steps, simplifying the installation and disassembly process and improving the convenience and work efficiency of the test.

[0021] The utility model ensures good leakage sealing performance during the test process by arranging the first sealing gasket, the second sealing gasket and the air seal, ensures the air tightness and water tightness of the safety valve under different working conditions, and improves the comprehensiveness and accuracy of the test.

[0022] The utility model is applicable to a variety of safety valves with similar structures. Through modular design and adjustable structure, it can flexibly adapt to the testing requirements of safety valves of different specifications and models, has wider applicability, and reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the safety valve testing tool of the utility model.

[0025] Figure 2 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0026] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle.

[0027] Description of the accompanying drawings:

[0028] 1. Intake gas; 11. Intake channel; 12. First sealing gasket; 13. Sliding member;

[0029] 2. Gas outlet; 21. Gas outlet channel; 22. Mounting through hole; 23. Second sealing gasket; 24. Gas inlet groove; 25. Gas seal; 26. Cover plate; 27. First limiting step;

[0030] 3. Adjustment rod; 31. Second limit step;

[0031] 4. Safety valve to be tested; 41. Spring seat;

[0032] 5. Elbow clamp;

[0033] 6. Mounting plate; 61. Support plate; 62. Slide groove. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0035] In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0036] In this utility model, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of this utility model, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0037] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0038] Reference Figure 1 As shown, a safety valve testing tool of the present invention includes:

[0039] The air inlet 1 is provided with an air inlet passage 11, and the air inlet passage 11 is adapted to connect with the air inlet portion of the safety valve 4 to be tested;

[0040] The gas outlet 2 is provided with a gas outlet channel 21;

[0041] The adjusting rod 3 is provided with a mounting hole 22 for the adjusting rod 3 to pass through, the mounting hole 22 is communicated with the air outlet channel 21, and the mounting hole 22 is suitable for docking with the air outlet portion of the safety valve 4 to be tested. The adjusting rod 3 passes through the mounting hole 22 and is connected to the spring seat 41 of the safety valve 4 to be tested;

[0042] The adjusting rod 3 can drive the spring seat 41 to rotate when rotating itself, so as to adjust the spring preload and change the set pressure of the safety valve 4 to be tested.

[0043] It can be understood that the spring seat 41 is engaged with the interior of the safety valve 4 to be tested through threads, and the spring preload force can be adjusted by rotating the spring seat 41 .

[0044] In one embodiment, the air inlet 1 is equipped with a first sealing gasket 12 capable of abutting against the air inlet portion of the safety valve 4 to be tested.

[0045] In one embodiment, a first installation groove is radially extended from one end of the installation through hole 22 close to the safety valve 4 to be tested, and a second sealing gasket 23 capable of abutting against the air outlet of the safety valve 4 to be tested is installed in the first installation groove.

[0046] Specifically, the center hole of the sealing gasket is clearance-matched with the adjusting rod 3 .

[0047] Reference Figure 2 As shown, the mounting through hole 22 is provided with an air inlet groove 24 , and the axial ends of the air inlet groove 24 extend to the gap between the central hole of the sealing gasket and the adjusting rod 3 and the air outlet channel 21 respectively.

[0048] In one embodiment, a second mounting groove is radially extended from one end of the mounting through hole 22 away from the safety valve 4 to be tested, and an air seal 25 is mounted in the second mounting groove in sealing contact with the adjustment rod 3 .

[0049] In one embodiment, referring to Figure 3 As shown, a cover plate 26 is installed on the outer wall of the gas outlet 2 on one axial side of the second mounting groove. A first limiting step 27 facing the inner side of the mounting through hole 22 is formed between the center hole of the cover plate 26 and the gas seal 25. A second limiting step 31 is provided on the side wall of the adjustment rod 3 to cooperate with the first limiting step 27. The provision of the cover plate 26 can limit the displacement of the adjustment rod 3.

[0050] In one embodiment, a toggle clamp 5 is further included, and the toggle clamp 5 is used to abut the safety valve 4 to be tested between the gas inlet 1 and the gas outlet 2.

[0051] The safety valve 4 to be tested is clamped between the first gasket 12 and the second gasket 23 and supported by the support plate 61. Due to the interaction of the first gasket 12, the second gasket 23, and the air seal 25, the entire test fixture has excellent leakage sealing performance and can be used for air and water leakage testing of safety valves.

[0052] In one embodiment, it further includes a mounting plate 6 and a support plate 61 arranged on the mounting plate 6 and used to support the safety valve 4 to be tested. The gas inlet 1 is slidably connected to the mounting plate 6, and the gas outlet 2 and the toggle clamp 5 are fixedly connected to the mounting plate 6 (by bolts).

[0053] Specifically, a slide groove 62 is provided on the mounting plate 6, and a sliding member 13 is installed at the bottom of the air inlet 1 to slide in the slide groove 62. The sliding member 13 can be a bolt and a gasket.

[0054] The working principle of this utility model is as follows:

[0055] Use the toggle clamp 5 to clamp the safety valve 4 under test between the first gasket 12 and the second gasket 23. Then, connect the air inlet pipe to the air inlet channel 11. After ventilation, test the flow rate of the safety valve through the air outlet channel 21. Alternatively, connect the air outlet channel 21 to water for water tightness testing. Throughout the test, the adjustment rod 3 can be used to adjust the set pressure of the safety valve 4 under test in real time. Therefore, this test fixture can both test air and water tightness and adjust the set pressure of the safety valve 4 under test in real time.

[0056] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A safety valve testing tool, characterized in that: include: An air intake (1) is provided with an air intake passage (11), wherein the air intake passage (11) is adapted to be connected to an air intake portion of a safety valve (4) to be tested; A gas outlet (2) is provided with a gas outlet channel (21); An adjusting rod (3), the gas outlet (2) is provided with a mounting through hole (22) suitable for the adjusting rod (3) to pass through, the mounting through hole (22) is communicated with the gas outlet channel (21), the mounting through hole (22) is suitable for docking with the gas outlet portion of the safety valve to be tested (4), and the adjusting rod (3) passes through the mounting through hole (22) and is connected to the spring seat (41) of the safety valve to be tested (4); The adjusting rod (3) can drive the spring seat (41) to rotate when the adjusting rod (3) rotates itself, so as to adjust the spring preload and change the set pressure of the safety valve (4) to be tested.

2. A safety valve testing tool according to claim 1, characterized in that: The air inlet (1) is provided with a first sealing gasket (12) capable of abutting against the air inlet portion of the safety valve (4) to be tested.

3. A safety valve testing tool according to claim 1, characterized in that: A first mounting groove is radially extended from one end of the mounting through hole (22) close to the safety valve (4) to be tested, and a second sealing gasket (23) capable of abutting against the air outlet of the safety valve (4) to be tested is installed in the first mounting groove.

4. A safety valve testing tool according to claim 3, characterized in that: The center hole of the second sealing gasket (23) is clearance-matched with the adjustment rod (3).

5. A safety valve testing tool according to claim 4, characterized in that: The mounting through hole (22) is provided with an air inlet groove (24), and the axial ends of the air inlet groove (24) respectively extend to the gap between the central hole of the second sealing gasket (23) and the adjustment rod (3) and the air outlet channel (21).

6. A safety valve testing tool according to claim 1, characterized in that: A second mounting groove is radially extended from one end of the mounting through hole (22) away from the safety valve to be tested (4), and an air seal (25) is mounted in the second mounting groove and is in sealing contact with the adjustment rod (3).

7. A safety valve testing tool according to claim 6, characterized in that: A cover plate (26) is installed on the outer wall of the gas outlet (2) on the axial side of the second mounting groove, and a first limiting step (27) facing the inner side of the mounting through hole (22) is formed between the center hole of the cover plate (26) and the gas seal (25), and a second limiting step (31) cooperating with the first limiting step (27) is provided on the side wall of the adjustment rod (3).

8. The safety valve testing tool according to claim 1, characterized in that: It also includes an elbow clamp (5), which is used to abut the safety valve to be tested (4) between the gas inlet (1) and the gas outlet (2).

9. A safety valve testing tool according to claim 8, characterized in that: It also includes a mounting plate (6) and a support plate (61) arranged on the mounting plate (6) and used to support the safety valve (4) to be tested, the gas inlet (1) is slidably connected to the mounting plate (6), and the gas outlet (2) and the elbow clamp (5) are fixedly connected to the mounting plate (6).

10. A safety valve testing tool according to claim 9, characterized in that: A slide groove (62) is provided on the mounting plate (6), and a sliding member (13) that slides in the slide groove (62) is installed at the bottom of the air inlet (1).

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