Air tightness test fixture

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to an air tightness test clamp, which comprises a valve core, an air inlet end and an air outlet end which are communicated with each other are arranged on the valve core, and the air outlet end is used for being connected with a water cooling pipe; the buckle is installed on the valve element in a radial scaling mode and used for limiting and fixing the water cooling pipe. The valve sleeve can be movably arranged outside the valve element in a sleeving mode in the axial direction X and is used for conducting radial limiting on the buckle which contracts in the radial direction; the sealing piece is arranged at the joint of the air outlet end of the valve element and the water cooling pipe; the water-cooled pipe clamp has the advantages that the clamp and the water-cooled pipe are fixedly connected through the buckles capable of shrinking in the radial direction and the valve sleeves capable of moving in the axial direction to conduct radial limiting on the buckles; a sealing piece is further arranged at the joint of the water cooling pipe and the clamp to guarantee the connection sealing performance between the clamp and the water cooling pipe. The clamp is simple in structural design, convenient and reliable to operate and capable of effectively improving the working efficiency of sealing detection of the water-cooled pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to an airtightness testing clamp. Background Art

[0002] With the continuous development of new energy vehicles, most battery packs on the market now use liquid cooling to dissipate heat. The liquid cooling water-cooling plate needs to be tested for air tightness before use. Helium is introduced into the water-cooling pipe connected to the water-cooling plate to detect the welding sealing between the water-cooling pipe and the water-cooling plate.

[0003] In the prior art, although most clamps used to connect the water-cooling pipe and the external air source can ensure that the connection between the clamp and the water-cooling pipe is firm and well-sealed, the connection and disassembly between the clamp and the water-cooling pipe are troublesome and laborious, resulting in low efficiency of the inspection operation. Utility Model Content

[0004] The purpose of the utility model is to provide an airtightness test fixture for the above-mentioned existing technical problems, so as to achieve the effect that the fixture is simple and convenient to use.

[0005] In view of this, the utility model provides an airtightness test fixture, comprising:

[0006] A valve core, wherein the valve core is provided with an air inlet end and an air outlet end which are connected to each other, and the air outlet end is used to be connected to a water cooling pipe;

[0007] A buckle, which can be radially scalably mounted on the valve core and is used to limit and fix the water cooling pipe;

[0008] A valve sleeve, which is movably sleeved on the outside of the valve core along the axial direction X and is used to radially limit the radially contracted buckle;

[0009] A sealing member is arranged at the connection between the air outlet end of the valve core and the water cooling pipe.

[0010] Furthermore, the valve core includes:

[0011] A valve body, wherein the air inlet end is arranged on the valve body;

[0012] An inner plug, the inner plug is movably arranged in the valve body along the axial direction X, and the gas outlet is arranged on the inner plug;

[0013] A first elastic member, the first elastic member is located in the valve body and abuts between the valve body and the inner plug along the axial direction X;

[0014] Wherein, the buckle is provided with a conical guide surface for abutting against the axial direction X of the inner plug.

[0015] Furthermore, a first protrusion which can radially abut against the inner wall of the valve sleeve is provided on the outer wall of the buckle.

[0016] Furthermore, a second protrusion that can achieve axial limitation with the water cooling pipe is provided on the inner wall of the buckle.

[0017] Furthermore, it also includes:

[0018] The second elastic member is sleeved outside the valve sleeve, and the second elastic member abuts between the valve body and the valve sleeve along the axial direction X.

[0019] Furthermore, it also includes:

[0020] The limiting member is detachably mounted on the outer wall of the valve body and is used as a limiting portion on the valve body that abuts against the second elastic member in the axial direction X.

[0021] Furthermore, the sealing element comprises:

[0022] A sealing gasket, which is sleeved on the gas outlet end of the inner plug and is used to axially contact and seal with the end of the water cooling pipe;

[0023] The first sealing ring is sleeved on the air outlet end of the inner plug and is used for radially contacting and sealing with the inner wall of the water cooling tube.

[0024] Furthermore, the valve core also includes:

[0025] The second sealing ring is sleeved on the outer peripheral wall of the inner plug and is used for radially contacting and sealing with the inner wall of the valve body.

[0026] Furthermore, an air pipe joint is provided on the air inlet end of the valve body.

[0027] Furthermore, there are multiple buckles, which are arranged in an annular gap array.

[0028] The beneficial effects of the utility model are:

[0029] The clamp is fixedly connected to the water cooling pipe by providing a radially contractible buckle and a valve sleeve that can move axially to limit the buckle radially. A seal is also provided at the connection between the water cooling pipe and the clamp to ensure the sealing of the connection between the clamp and the water cooling pipe. The clamp has a simple structural design, convenient and reliable operation, and effectively improves the working efficiency of water cooling pipe sealing detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 It is a schematic diagram of the overall structure of the utility model from another perspective;

[0032] Figure 3 It is a cross-sectional view of the internal structure of the utility model;

[0033] The symbols in the figure are:

[0034] 1. Valve core; 11. Air inlet end; 12. Air outlet end; 13. Valve body; 14. Internal plug; 15. First elastic member; 2. Buckle; 21. Conical guide surface; 22. First raised portion; 23. Second raised portion; 3. Valve sleeve; 31. Second elastic member; 32. Retaining ring; 33. Wire spring; 4. Sealing gasket; 5. First sealing ring; 6. Second sealing ring; 7. Air pipe joint; 8. Water cooling pipe; 81. Concave hole. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] Embodiment 1:

[0038] This embodiment provides an airtightness test fixture, comprising:

[0039] A valve core 1, wherein the valve core 1 is provided with an air inlet end 11 and an air outlet end 12 which are connected to each other, and the air outlet end 12 is used to be connected to a water cooling pipe 8;

[0040] A buckle 2, which can be radially scalably mounted on the valve core 1 and is used to limit and fix the water cooling pipe 8;

[0041] A valve sleeve 3, which is movably sleeved on the outside of the valve core 1 along the axial direction X and is used to radially limit the radially contracted buckle 2;

[0042] A sealing member is provided at the connection between the air outlet end 12 of the valve core 1 and the water cooling pipe 8 .

[0043] In the present technical solution, one end of the clip 2 is installed on the valve core 1, and the other end can expand or contract radially. When the clamp is in a normal state without working and the valve sleeve is compressed, the clip 2 is in a radially open state, and the air outlet end 12 of the valve core 1 is located at the radial center position of the clip 2.

[0044] When the clamp is working, the staff holds the outer side of the valve sleeve 3 and plugs the water-cooling tube 8 to be tested into the air outlet end 12 of the valve core 1, and then the buckle 2 will shrink radially, and the water-cooling tube 8 will be clamped and fixed by the buckle 2 and the valve core 1; at the same time, the valve sleeve 3 is moved along the axial direction X, and the inner wall of the valve sleeve 3 abuts against the outer wall of the buckle 2, and the valve sleeve 3 is used to radially limit the radially contracted buckle 2, so that the water-cooling tube 8 is clamped between the buckle 2 and the air outlet end 12 of the valve core 1, so as to realize the fixed connection between the water-cooling tube 8 and the clamp, and the inner wall of the water-cooling tube 8 is kept in close contact with the seal, thereby ensuring the sealing of the connection between the water-cooling tube 8 and the clamp.

[0045] After the water-cooling tube 8 is fixed on the fixture and will not fall off, helium is introduced into the air inlet end 11 of the valve core 1. After the helium passes through the valve core 1, it is discharged from the air outlet end 12 into the water-cooling tube 8, thereby realizing the sealing test between the water-cooling tube 8 and the liquid cooling plate. When the test is completed, the operator moves the valve sleeve 3 along the axial direction X to reset it, and the buckle 2 is no longer limited by the radial position of the valve sleeve 3. The buckle 2 can be opened, and the water-cooling tube 8 can be pulled out of the fixture.

[0046] In summary, by providing a radially contractible buckle 2 and a valve sleeve 3 that can move axially to radially limit the buckle 2, a fixed connection between the clamp and the water-cooling pipe 8 is achieved; a seal is also provided at the connection between the water-cooling pipe 8 and the clamp to ensure the sealing of the connection between the clamp and the water-cooling pipe 8. The clamp has a simple structural design, convenient and reliable operation, and effectively improves the working efficiency of the water-cooling pipe 8 sealing detection.

[0047] Embodiment 2:

[0048] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] Furthermore, the valve core 1 comprises:

[0050] A valve body 13, wherein the air inlet end 11 is disposed on the valve body 13;

[0051] An inner plug 14, wherein the inner plug 14 is movably disposed in the valve body 13 along the axial direction X, and the gas outlet 12 is disposed on the inner plug 14;

[0052] A first elastic member 15, which is located in the valve body 13 and abuts between the valve body 13 and the inner plug 14 along the axial direction X;

[0053] The buckle 2 is provided with a conical guide surface 21 for abutting against the inner plug 14 in the axial direction X.

[0054] In the present technical solution, the first elastic member 15 can be a spring. When the clamp is working, the water-cooling tube 8 is inserted into the air outlet end 12 of the inner plug 14 and the end of the water-cooling tube 8 abuts against the inner plug 14, applying a certain thrust to the inner plug 14, so that the inner plug 14 moves along the axial direction X into the valve body 13, thereby causing the first elastic member 15 to be compressed.

[0055] As the inner plug 14 moves, the buckle 2 contracts radially, the conical guide surface 21 remains in contact with the inner plug 14, and the valve sleeve 3 moves along the axial direction X to radially limit the buckle 2, so that the water-cooling pipe 8 is firmly clamped by the air outlet end 12 and the buckle 2, thereby achieving the connection and fixation between the clamp and the water-cooling pipe 8.

[0056] When the fixture completes the detection operation, the valve sleeve 3 is reset by moving along the axial direction X, and the buckle 2 is no longer affected by the radial limiting effect of the valve sleeve 3. At this time, the elastic force generated by the compression of the first elastic member 15 will push the inner plug 14 to move along the axial direction X. The inner plug 14 maintains abutment with the conical guide surface 21 of the buckle 2, indirectly pushing the buckle 2 to open radially, so that the water-cooling pipe 8 is no longer clamped and fixed, and the connection between the fixture and the water-cooling pipe 8 is disconnected.

[0057] Through this structural design, by moving the valve sleeve 3, the elastic force generated by the compression of the first elastic member 15 is used to push the inner plug 14 to move, thereby indirectly pushing the water-cooling pipe 8 away from the buckle 2, allowing the water-cooling pipe 8 to automatically pop out of the clamp, so that the operator can save effort and ease when separating the clamp and the water-cooling pipe 8, and the operation is simple and convenient.

[0058] Embodiment 3:

[0059] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] Furthermore, a first protrusion 22 which can radially abut against the inner wall of the valve sleeve 3 is provided on the outer wall of the buckle 2 .

[0061] In the present technical solution, a guide slope is provided on the side of the first protrusion 22 close to the valve sleeve 3. When the valve sleeve 3 moves along the axial direction X to radially limit the buckle 2, the end of the valve sleeve 3 first abuts against the guide slope, and then the valve sleeve 3 moves further, the first protrusion 22 is squeezed, and the buckle 2 contracts radially. When the first protrusion 22 radially abuts against the inner wall of the valve sleeve 3, the buckle 2 is subjected to radial pressure applied by the valve sleeve 3, and the radial displacement of the buckle 2 is limited by the valve sleeve 3, so that the water-cooling tube 8 is clamped and fixed.

[0062] Furthermore, the inner wall of the buckle 2 is provided with a second protrusion 23 that can achieve axial limitation with the water-cooling tube 8, and the water-cooling tube 8 is provided with a concave hole 81 that matches the second protrusion 23. When the first protrusion 22 of the buckle 2 is radially abutted against the inner wall of the valve sleeve 3 to achieve radial limitation of the buckle 2, the second protrusion 23 is located in the concave hole 81 of the water-cooling tube 8, and the movement of the water-cooling tube 8 in the axial direction X is limited by the clamping fit between the second protrusion 23 and the concave hole 81.

[0063] Through this structural design, the inner wall of the valve sleeve 3 is abutted against the first protrusion 22 of the buckle 2 to enhance the radial limiting effect of the valve sleeve 3 on the buckle 2, and the second protrusion 23 of the buckle 2 is engaged with the recessed hole 81 on the water-cooling pipe 8 to enhance the limiting effect on the water-cooling pipe 8 in the axial direction X, thereby effectively improving the connection firmness between the water-cooling pipe 8 and the clamp.

[0064] Embodiment 4:

[0065] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] Furthermore, it also includes:

[0067] The second elastic member 31 is sleeved outside the valve sleeve 3 , and the second elastic member 31 abuts between the valve body 13 and the valve sleeve 3 along the axial direction X.

[0068] In the present technical solution, the second elastic member 31 can be a spring. When the clamp is connected to the water-cooling tube 8 so that the buckle 2 is in a working contracted state, the two ends of the second elastic member 31 respectively abut against the valve body 13 and the valve sleeve 3 along the axial direction X, restricting the movement of the valve sleeve 3 in the axial direction X and enhancing the structural stability of the clamp. When the clamp and the water-cooling tube 8 need to be separated, the valve sleeve 3 is moved to squeeze the second elastic member 31, the first elastic member 15 is reset to eject the water-cooling tube 8 out of the clamp, and the buckle 2 is restored to the open state when it is not working. By setting the second elastic member 31, the movement of the valve sleeve 3 in the axial direction X is more stable and reliable, and the operation of the staff is more convenient and labor-saving.

[0069] Embodiment 5:

[0070] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0071] Furthermore, it also includes:

[0072] The limiting member is detachably mounted on the outer wall of the valve body 13 and is used as a limiting portion on the valve body 13 that abuts against the second elastic member 31 in the axial direction X.

[0073] In the present technical solution, the limiting member includes a retaining ring 32 and a wire spring 33. The retaining ring 32 is sleeved on the outside of the valve body 13 and abuts against the second elastic member 31, and plays a limiting role on the second elastic member 31. An annular groove is provided on the outside of the valve body 13. The wire spring 33 is sleeved on the valve body 13 and is located in the annular groove. One end of the wire spring 33 abuts against the groove wall of the annular groove, and the other end abuts against the retaining ring 32, which is used to limit the movement of the retaining ring 32 in the axial direction X, thereby realizing the axial limiting of the second elastic member 31. The limiting member can also be a nut retaining ring 32, which is detachably mounted on the valve body 13 through a threaded connection to realize the axial limiting of the second elastic member 31.

[0074] Embodiment 6:

[0075] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] Furthermore, the sealing element comprises:

[0077] The sealing gasket 4 is sleeved on the gas outlet end 12 of the inner plug 14 and is used to axially contact and seal with the end of the water cooling pipe 8;

[0078] The first sealing ring 5 is sleeved on the gas outlet end 12 of the inner plug 14 and is used for radially contacting and sealing with the inner wall of the water-cooling tube 8 .

[0079] In the present technical solution, when the water-cooling tube 8 is plugged into the gas outlet end 12 of the inner plug 14, the end of the water-cooling tube 8 is kept in close contact with the sealing gasket 4, and the inner wall of the water-cooling tube 8 is kept in close contact with the first sealing ring 5. Through this structural design, the connection between the water-cooling tube 8 and the inner plug 14 is double-sealed, so that no gas leakage occurs at the connection between the water-cooling tube 8 and the inner plug 14 during the detection work, thereby effectively improving the detection reliability and work efficiency of the fixture.

[0080] Furthermore, the valve core 1 further comprises:

[0081] The second sealing ring 6 is sleeved on the outer peripheral wall of the inner plug 14 and is used for radially contacting and sealing with the inner wall of the valve body 13 .

[0082] In the present technical solution, the structural design improves the sealing performance of the connection between the inner plug 14 and the valve body 13, thereby preventing the detection gas from leaking from the connection between the inner plug 14 and the valve body 13, thereby affecting the detection reliability of the fixture.

[0083] Embodiment 7:

[0084] This embodiment provides an airtightness test fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0085] Furthermore, an air pipe joint 7 is provided on the air inlet end 11 of the valve body 13 .

[0086] In this technical solution, an air pipe joint 7 is provided on the air inlet end 11 to improve the connection firmness between the air inlet end 11 and the external air source, ensuring that the connection between the fixture and the air source always remains stable and reliable and is not easy to loosen or fall off, thereby effectively improving the work efficiency of the detection operation.

[0087] Furthermore, the buckles 2 are multiple and arranged in an annular gap array. This structural design improves the connection firmness between the air outlet 12 and the water cooling pipe 8, ensuring that the connection between the clamp and the water cooling pipe 8 remains stable and reliable, thereby further improving work efficiency.

[0088] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An airtightness test fixture, characterized in that: include: A valve core (1), wherein the valve core (1) is provided with an air inlet end (11) and an air outlet end (12) which are connected to each other, and the air outlet end (12) is used to be connected to a water cooling pipe (8); A buckle (2), the buckle (2) being mounted on the valve core (1) in a radially scalable manner and being used to limit and fix the water cooling pipe (8); A valve sleeve (3), the valve sleeve (3) being movably sleeved outside the valve core (1) along the axial direction X and being used for radially limiting the radially contracted buckle (2); A sealing member is provided at the connection between the air outlet end (12) of the valve core (1) and the water cooling pipe (8).

2. The airtightness test fixture according to claim 1, characterized in that: The valve core (1) comprises: A valve body (13), wherein the air inlet end (11) is arranged on the valve body (13); An inner plug (14), the inner plug (14) being movably arranged in the valve body (13) along the axial direction X, and the gas outlet end (12) being arranged on the inner plug (14); A first elastic member (15), the first elastic member (15) is located in the valve body (13) and abuts between the valve body (13) and the inner plug (14) along the axial direction X; The buckle (2) is provided with a conical guide surface (21) for abutting against the inner plug (14) in the axial direction X.

3. The airtightness test fixture according to claim 2, characterized in that: The outer wall of the buckle (2) is provided with a first protruding portion (22) which can radially abut against the inner wall of the valve sleeve (3).

4. The airtightness test fixture according to claim 2, characterized in that: A second protrusion (23) capable of achieving axial limitation with the water cooling pipe (8) is provided on the inner wall of the buckle (2).

5. The airtightness test fixture according to claim 2, characterized in that: Also includes: A second elastic member (31), wherein the second elastic member (31) is sleeved outside the valve sleeve (3), and the second elastic member (31) abuts between the valve body (13) and the valve sleeve (3) along the axial direction X.

6. The airtightness test fixture according to claim 5, characterized in that: Also includes: The limiting member is detachably mounted on the outer wall of the valve body (13) and is used as a limiting portion on the valve body (13) that abuts against the second elastic member (31) in the axial direction X.

7. The airtightness test fixture according to claim 2, characterized in that: The sealing element comprises: A sealing gasket (4), wherein the sealing gasket (4) is sleeved on the air outlet end (12) of the inner plug (14) and is used for axially contacting and sealing with the end of the water cooling pipe (8); A first sealing ring (5), which is sleeved on the air outlet end (12) of the inner plug (14) and is used for radially contacting and sealing with the inner wall of the water cooling pipe (8).

8. The airtightness test fixture according to claim 2, characterized in that: The valve core (1) further comprises: A second sealing ring (6), the second sealing ring (6) is sleeved on the outer peripheral wall of the inner plug (14) and is used for radially contacting and sealing with the inner wall of the valve body (13).

9. The airtightness test fixture according to claim 2, characterized in that: An air pipe joint (7) is provided on the air inlet end (11) of the valve body (13).

10. The airtightness test fixture according to claim 1, characterized in that: The buckles (2) are multiple and arranged in an annular gap array.

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