Combined tool for airtight test and welding of valve

Abstract

The utility model relates to the technical field of valve test tools, in particular to a combined tool for a valve airtight test and welding, which solves the problem in the prior art that the quality of a valve is affected as the valve is repeatedly adjusted and measured in stroke and disassembled on the tool during the airtight test and welding, and comprises a tool base, a valve mounting surface and a connector mounting surface are arranged on the tool base, an outlet connector is detachably connected to the connector mounting surface, and a double-sealing assembly is arranged between the outlet connector and the connector mounting surface; the tool base is provided with a welding hole communicated with the valve installation face and the connector installation face, and the welding hole corresponds to the joint position of the valve body and the valve deck. The beneficial effects are that the valve stroke does not need to be adjusted and measured again when the circumference welding of the valve body and the valve cover is carried out, the synchronization of the relative position fixation of the valve body and the valve cover and the airtight test is realized, and the probability of quality problems of the valve is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve testing fixture technology, and in particular to a combined fixture for valve airtightness testing and welding. Background Technology

[0002] The sealing characteristics of a valve are a crucial aspect of its performance, directly affecting its ability to effectively prevent media leakage. Currently, valve assembly requires repeated stroke adjustments and tooling disassembly, significantly impacting processing cycles and work efficiency. Shortening production cycles, reducing production costs, and improving efficiency are pressing issues that need to be addressed.

[0003] Patent CN117723224A discloses a sealing test fixture for a miniature solenoid valve, including a base. The base has an inlet and an outlet end on its side wall. An installation groove for fixing the solenoid valve body is provided at the end of the base. A sealing groove that abuts against the solenoid valve body is provided on the outer end face of the installation groove. A sealing ring with an inner diameter smaller than the inner diameter of the installation groove is provided inside the sealing groove. This test fixture can complete the detection of internal and external leakage of the solenoid valve by changing the sealing position and using a single fixture with a rubber ring. The rubber ring seal replaces the sealing gasket and clamping groove, providing convenience for the product manufacturing process. However, some valve assembly processes require welding of the valve body and valve cover. After conducting the valve's internal sealing characteristic test, the valve needs to be removed from the airtight fixture and reinstalled on the welding fixture to readjust the stroke before welding can proceed. Repeated disassembly and reassembly of the valve can easily affect the fitting accuracy of the valve body and valve cover during welding, increasing the probability of valve quality problems. Utility Model Content

[0004] This invention proposes a combined fixture for valve airtightness testing and welding, which solves the problem in the prior art where valves require repeated stroke adjustments and disassembly on the fixture during airtightness testing and welding, affecting valve quality.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A combined fixture for valve airtightness testing and welding includes a fixture base with a valve mounting surface and a connector mounting surface. An outlet connector is detachably connected to the connector mounting surface, and a double sealing assembly is provided between the outlet connector and the connector mounting surface. The fixture base has welding holes connecting the valve mounting surface and the connector mounting surface, with the welding holes corresponding to the joint positions of the valve body and valve cover. After the airtightness test, the outlet connector can be removed, and spot welding can be performed on the joint positions of the valve body and valve cover through the welding holes to fix their relative positions. Then, the valve can be removed from the fixture base for circumferential welding. During circumferential welding of the valve body and valve cover, there is no need to readjust the valve stroke, achieving simultaneous fixation of the relative positions of the valve body and valve cover and the airtightness test, reducing the probability of valve quality problems.

[0007] The dual-sealing assembly includes an outer ring sealing groove and an inner ring sealing groove, which are disposed on the joint mounting surface of the fixture base. An outer ring sealing ring is provided within the outer ring sealing groove, and an inner ring sealing ring is provided within the inner ring sealing groove. The dual-sealing assembly seals the gap between the outlet joint and the fixture base, ensuring the sealing performance between the outlet joint and the fixture base during airtightness testing and enhancing the reliability of the density.

[0008] The outer and inner ring sealing grooves are concentrically arranged, and the welding hole is located between the outer and inner ring sealing grooves. During the airtightness test, gas is prevented from escaping through the welding hole from the gap between the outlet joint and the tooling base, ensuring the accuracy of the test.

[0009] The number of welding holes is at least two, and the welding holes are arranged in a circumferential array on the joint mounting surface. Spot welding is performed at the joint between the valve body and the valve cover through multiple welding holes to ensure the relative position of the valve body and the valve cover is fixed and stable, thereby ensuring valve quality.

[0010] The welding holes are arranged perpendicular to the valve mounting surface. This facilitates the welding head to quickly locate the joint between the valve body and the valve cover during spot welding.

[0011] A sealing gasket is provided on the valve mounting surface of the tooling base, and the sealing gasket is located on the outside of the joint between the valve body and the valve cover. The sealing gasket seals the gap between the valve body and the tooling base, ensuring the accuracy of the valve airtightness test results.

[0012] The fixture base is equipped with an inlet nozzle, and an air inlet pipe is installed inside the fixture base. The inlet nozzle is connected to the valve mounting surface through the air inlet pipe. During the airtightness test, gas is introduced into the valve through the inlet nozzle and the air inlet pipe.

[0013] The tooling base is equipped with an exhaust pipe that connects the valve mounting surface and the connector mounting surface. The outlet of the exhaust pipe is located inside the inner ring seal. During the airtightness test, the gas discharged from the valve is released through the exhaust pipe and the outlet connector.

[0014] The valve mounting surface of the tooling base is equipped with an outlet sealing ring and an inlet sealing ring. The outlet sealing ring corresponds to the inlet position of the outlet pipe, and the inlet sealing ring corresponds to the outlet position of the inlet pipe. The outlet sealing ring ensures the sealing between the valve outlet and the tooling base, and the inlet sealing ring ensures the sealing between the valve inlet and the tooling base.

[0015] The outlet connector is connected to the fixture base via connector screws. Multiple connector screws work together to secure the outlet connector, ensuring the stability of the connection between the outlet connector and the fixture base.

[0016] The beneficial effects of this utility model are as follows: Before welding the valve body and valve cover, the internal sealing performance of the valve is tested. After the internal sealing performance test, the outlet connector is removed from the tooling base, and spot welding is performed on the joint between the valve body and valve cover through the welding hole to fix their relative positions. Then, the valve is removed from the tooling base and circumferential welding is performed on the joint. During the circumferential welding of the valve body and valve cover, there is no need to readjust the valve stroke, achieving simultaneous fixing of the relative positions of the valve body and valve cover and the airtightness test, thus reducing the probability of valve quality problems.

[0017] The outlet connector and the tooling base are sealed with a double sealing component, which not only ensures the reliability of the seal between the outlet connector and the tooling base, but also seals the welding hole to prevent gas from escaping from the gap between the outlet connector and the tooling base through the welding hole during the airtightness test, thus ensuring the accuracy of the test.

[0018] The combined tooling cleverly integrates airtightness testing and welding fixtures, enabling a one-stop operation from testing to welding, greatly simplifying the operation process and improving work efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a combined tooling for valve airtightness testing and welding according to the present invention;

[0021] Figure 2Left view of the assembled tooling;

[0022] Figure 3 This is a cross-sectional view of the combined tooling for airtightness testing.

[0023] Figure 4 Left view of the assembled tooling during spot welding;

[0024] Figure 5 for Figure 4 Sectional view of the combined tooling AA.

[0025] In the diagram: 1. Outlet connector, 2. Tooling base, 21. Connector threaded hole, 22. Outer ring sealing groove, 23. Inner ring sealing groove, 24. Welding hole, 3. Inlet nozzle, 4. Valve body, 41. Valve cover, 42. Valve body screw, 5. Inner ring sealing ring, 6. Connector screw, 7. Outer ring sealing ring, 8. Sealing gasket, 9. Outlet sealing ring, 10. Inlet sealing ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1, as Figure 1 , Figure 2 , Figure 3 As shown, a combined fixture for valve airtightness testing and welding includes a fixture base 2, on which a valve mounting surface and a connector mounting surface are provided. An outlet connector 1 is detachably connected to the connector mounting surface, and a double sealing assembly is provided between the outlet connector 1 and the connector mounting surface. The fixture base 2 has welding holes 24 connecting the valve mounting surface and the connector mounting surface, and the welding holes 24 are set at the joint position of the valve body 4 and the valve cover 41. After the outlet connector 1 is removed from the fixture base 2, spot welding can be performed on the joint position of the valve body 4 and the valve cover 41 through the welding holes 24 to fix the relative position of the valve body 4 and the valve cover 41. Then, the valve body 4 and the valve cover 41 are removed from the fixture base 2, and circumferential welding is performed at the joint position. During circumferential welding, there is no need to readjust the valve stroke, realizing the simultaneous fixing of the relative position of the valve body 4 and the valve cover 41 and the airtightness test, reducing the probability of valve quality problems.

[0028] It combines airtightness testing fixtures and welding fixtures, enabling one-stop operation from airtightness testing to welding, simplifying the operation process and improving work efficiency.

[0029] Furthermore, such as Figure 4 , Figure 5 As shown, the dual-sealing assembly includes an outer ring sealing groove 22 and an inner ring sealing groove 23. The outer ring sealing groove 22 and the inner ring sealing groove 23 are disposed on the joint mounting surface of the fixture base 2. An outer ring sealing ring 7 is disposed within the outer ring sealing groove 22, and an inner ring sealing ring 5 is disposed within the inner ring sealing groove 23. The inner ring sealing ring 5 and the outer ring sealing ring 7 together seal the gap between the outlet joint 1 and the fixture base 2, ensuring the accuracy of the airtightness test.

[0030] Furthermore, the outer ring sealing groove 22 and the inner ring sealing groove 23 are arranged concentrically, and the welding hole 24 is located between the outer ring sealing groove 22 and the inner ring sealing groove 23. During the airtightness test, gas is prevented from escaping through the welding hole 24 from the gap between the outlet joint 1 and the tooling base 2 to ensure the accuracy of the test.

[0031] Furthermore, the number of welding holes 24 is at least two, and the welding holes 24 are arranged in a circumferential array on the joint mounting surface. In this embodiment, the number of welding holes 24 is six. During spot welding, the joint position of the valve body 4 and the valve cover 41 is spot welded through the six welding holes 24 to ensure that the relative position of the valve body 4 and the valve cover 41 is fixed and stable, thereby ensuring the quality of the valve.

[0032] Furthermore, the welding hole 24 is arranged perpendicular to the valve mounting surface. In this embodiment, the valve mounting surface and the connector mounting surface are arranged parallel to each other on both sides of the tooling base 2, which simplifies the relative positions between the valve mounting surface, the connector mounting surface and the welding hole 24, and facilitates the fabrication of the tooling base 2; at the same time, during spot welding, it is easy for the welding head to quickly locate the joint position between the valve body 4 and the valve cover 41.

[0033] Furthermore, a sealing gasket 8 is provided on the valve mounting surface of the tooling base 2, and the sealing gasket 8 is located on the outside of the joint between the valve body 4 and the valve cover 41. In this embodiment, the sealing gasket 8 is a copper gasket. When welding through the welding hole 24, the copper gasket has good thermal conductivity, a low coefficient of linear expansion, and is not easily deformed. Copper has a high melting point and is not easy to stick to the welding substrate. In a vacuum environment, copper has stable chemical properties, few surface oxides, and an extremely low outgassing rate. Under electron beam impact, the sputtering yield of copper (about 0.1 atoms / ion) is lower than that of materials such as aluminum and steel, effectively preventing the copper gasket 8 from sticking to the valve during welding. The sealing gasket 8 seals the gap between the valve body 4 and the tooling base 2, ensuring the accuracy of the valve airtightness test results.

[0034] Example 2, based on Example 1, provides a combined tooling for valve airtightness testing and welding. The tooling base 2 is equipped with an inlet nozzle 3, and an air inlet pipe is located within the tooling base 2. The inlet nozzle 3 is connected to the valve mounting surface via the air inlet pipe. The inlet nozzle 3 is welded to the tooling base 2. The air inlet pipe is an L-shaped pipe, with its inlet connected to the inlet nozzle 3, and its outlet corresponding to the valve inlet position.

[0035] Furthermore, the tooling base 2 is equipped with an air outlet pipe, which connects the valve mounting surface and the connector mounting surface. The outlet of the air outlet pipe is located inside the inner ring sealing ring 5. The inlet of the air outlet pipe corresponds to the outlet position of the valve.

[0036] Furthermore, the valve mounting surface of the tooling base 2 is provided with an outlet sealing ring 9 and an inlet sealing ring 10. The outlet sealing ring 9 corresponds to the inlet position of the air outlet pipe, and the inlet sealing ring 10 corresponds to the outlet position of the air inlet pipe. The outlet sealing ring 9 ensures the sealing between the valve outlet and the tooling base 2, and the inlet sealing ring 10 ensures the sealing between the valve inlet and the tooling base 2.

[0037] Furthermore, the outlet connector 1 is connected to the tooling base 2 via connector screws 6. The tooling base 2 has connector threaded holes 21 on its connector mounting surface. In this embodiment, four connector screws 6 are used, and these four screws are threaded into the connector threaded holes 21 on the connector mounting surface. The connector screws 6 secure the outlet connector 1, ensuring the stability of the connection between the outlet connector 1 and the tooling base 2. The valve body 4 is connected to the tooling base 2 via valve body screws 42, ensuring the stability of the connection between the valve body 4 and the tooling base 2.

[0038] The method of using the combined tooling includes an internal sealing performance test process, a welding process, and an external sealing performance test process. The internal sealing performance test process is as follows: Install an outer ring sealing ring 7 in the outer ring sealing groove 22 and an inner ring sealing ring 5 in the inner ring sealing groove 23. Use connector screws 6 to connect the outlet connector 1 to the tooling base 2. Install a sealing gasket 8, an outlet sealing ring 9, and an inlet sealing ring 10 on the valve mounting surface. Place the valve cover 41 on the valve body 4 and use valve body screws 42 to connect the valve body 4 to the tooling base 2. The valve body 4 and the tooling base 2 fix the valve cover 41. At this time, place the outlet connector 1 of the combined tooling with the valve installed in the water environment. Air is circulated into the combined tooling through the inlet nozzle 3. Observe whether there is air leakage at the outlet connector 1 to achieve the test of the valve's internal sealing performance.

[0039] The welding process is as follows: After the internal sealing performance test, loosen the connector screw 6 and remove the outlet connector 1 from the tooling base 2. At this time, laser welding is performed on the joint position of the valve body 4 and the valve cover 41 through the welding hole 24. Then, loosen the valve body screw 42 and remove the valve body 4 and the valve cover 41 from the tooling base 2. Circumferential welding is performed on the joint position of the valve body 4 and the valve cover 41, and the welding of the valve is completed.

[0040] The external sealing performance test process is as follows: remove the sealing gasket 8 from the valve mounting surface, then reconnect the welded valve to the tooling base 2 through the valve body screw 42, and reconnect the outlet connector 1 to the tooling base 2; place the combined tooling with the valve installed in the water environment, ventilate the combined tooling through the inlet nozzle 3, and observe whether there is air leakage at the gap between the tooling base 2 and the valve, so as to test the external sealing performance of the valve.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined tooling for valve airtightness testing and welding, comprising a tooling base (2), characterized in that, The tooling base (2) is provided with a valve mounting surface and a connector mounting surface. An outlet connector (1) is detachably connected to the connector mounting surface. A double sealing assembly is provided between the outlet connector (1) and the connector mounting surface. The tooling base (2) is provided with a welding hole (24) that connects the valve mounting surface and the connector mounting surface. The welding hole (24) is set at the joint position of the valve body (4) and the valve cover (41).

2. The combined tooling for valve airtightness testing and welding according to claim 1, characterized in that, The dual sealing assembly includes an outer ring sealing groove (22) and an inner ring sealing groove (23). The outer ring sealing groove (22) and the inner ring sealing groove (23) are set on the joint mounting surface of the tooling base (2). An outer ring sealing ring (7) is provided in the outer ring sealing groove (22), and an inner ring sealing ring (5) is provided in the inner ring sealing groove (23).

3. The combined tooling for valve airtightness testing and welding according to claim 2, characterized in that, The outer ring sealing groove (22) and the inner ring sealing groove (23) are arranged concentrically, and the welding hole (24) is located between the outer ring sealing groove (22) and the inner ring sealing groove (23).

4. The combined tooling for valve airtightness testing and welding according to any one of claims 1 to 3, characterized in that, The number of welding holes (24) is at least two, and the welding holes (24) are arranged in a circumferential array on the joint mounting surface.

5. The combined tooling for valve airtightness testing and welding according to claim 4, characterized in that, The welding holes (24) are arranged perpendicular to the valve mounting surface.

6. The combined tooling for valve airtightness testing and welding according to any one of claims 1 to 3 and 5, characterized in that, A sealing gasket (8) is provided on the valve mounting surface of the tooling base (2). The sealing gasket (8) is located on the outside of the joint between the valve body (4) and the valve cover (41).

7. The combined tooling for valve airtightness testing and welding according to claim 6, characterized in that, The tooling base (2) is equipped with an inlet nozzle (3), and the tooling base (2) is equipped with an air inlet pipe. The inlet nozzle (3) is connected to the valve mounting surface through the air inlet pipe.

8. The combined tooling for valve airtightness testing and welding according to claim 7, characterized in that, The tooling base (2) is equipped with an air outlet pipe, which connects the valve mounting surface and the joint mounting surface. The outlet of the air outlet pipe is located inside the inner ring sealing ring (5).

9. The combined tooling for valve airtightness testing and welding according to claim 8, characterized in that, The valve mounting surface of the tooling base (2) is provided with an outlet sealing ring (9) and an inlet sealing ring (10). The outlet sealing ring (9) corresponds to the inlet position of the air outlet pipe, and the inlet sealing ring (10) corresponds to the outlet position of the air inlet pipe.

10. The combined tooling for valve airtightness testing and welding according to claim 1 or 9, characterized in that, The outlet connector (1) is connected to the tooling base (2) by connector screws (6).

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