Air tightness detection tool

Abstract

The utility model provides an air tightness detection tool, which is suitable for a to-be-tested shell, the to-be-tested shell is provided with a first connecting part, the first connecting part is provided with a circulation hole communicated with an internal cavity of the to-be-tested shell, the air tightness detection tool comprises a clamping assembly and an air transmission part, the clamping assembly comprises two clamping pieces which are oppositely arranged, and the two clamping pieces are connected with the air transmission part. The two clamping pieces are arranged in a manner of moving in opposite directions so as to be clamped on the circumferential side wall of the first connecting part; the gas transmission component is located between the two clamping pieces, so that when the clamping pieces are clamped on the circumferential side wall of the first connecting part, a gas outlet of the gas transmission component communicates with the circulation hole. The air tightness detection tool provided by the utility model solves the problem that the air tightness detection tool in the prior art is inconvenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of battery air tightness detection, in particular to an air tightness detection tool. Background Art

[0002] Before lithium batteries leave the factory, the battery shell will be tested for air tightness. The specific testing method is: a square one-way air permeable device is set on the battery shell, and the air tightness testing tooling is connected to the one-way air permeable device, so that the air outlet of the air tightness testing tooling is connected to the internal cavity of the battery through the one-way air permeable device; a certain amount of gas is introduced into the internal cavity of the battery being tested through the air outlet, and then maintained for a certain period of time to detect whether there is gas leakage in the battery shell, and then determine whether the air tightness of the battery shell on the side is good.

[0003] However, the connection structure of common air tightness testing tools is mostly circular. The air tightness testing tool is connected to the one-way air permeable device by putting the circular connection structure on the square one-way air permeable device and wrapping and clamping the one-way air permeable device from the four corners. However, this connection method requires the user to laboriously put the circular connection structure on the square one-way air permeable device, which is inconvenient for the user to install the air tightness testing tool. Utility Model Content

[0004] The main purpose of the utility model is to provide an airtightness detection tool to solve the problem of inconvenient installation of airtightness detection tool in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an airtightness detection tool, which is suitable for a shell to be tested, wherein a first connecting part is arranged on the shell to be tested, and a flow hole connected to the internal cavity of the shell to be tested is arranged on the first connecting part, and the airtightness detection tool comprises: a clamping assembly and a gas delivery component, wherein the clamping assembly comprises two clamping pieces arranged opposite to each other, and the two clamping pieces can be arranged to move toward each other to clamp on the circumferential side wall of the first connecting part; the gas delivery component is located between the two clamping pieces, so that when the clamping piece is clamped on the circumferential side wall of the first connecting part, the gas outlet of the gas delivery component is connected with the flow hole.

[0006] Furthermore, the air tightness testing tool also includes a mounting piece, a clamping assembly can be movably arranged on the mounting piece, two clamping pieces are relatively arranged on both sides of the mounting piece along a first preset direction, and the two clamping pieces can be movably arranged toward each other along the first preset direction; the gas delivery component can be movably arranged on the mounting piece, so that when the clamping piece is clamped on the first connecting part, the gas delivery component can be movably arranged along the second preset direction toward the direction close to the first connecting part to abut against the axial end face of the first connecting part, so that the gas outlet of the gas delivery component is connected to the flow hole; wherein the first preset direction is arranged perpendicular to the second preset direction.

[0007] Furthermore, a guide portion is provided on the surface of the mounting member close to the first connecting portion, and a guide groove extending along the first preset direction is provided in the guide portion; each clamping member includes a clamping portion and a limiting portion which are connected to each other, the clamping portion is used to clamp the first connecting portion, and the limiting portion can be movably arranged in the guide groove so that the two clamping members can move toward each other along the first preset direction.

[0008] Furthermore, along the circumference of the first connecting portion, the clamping portion includes a first clamping segment, a second clamping segment and a third clamping segment which are connected in sequence, the first clamping segment and the second clamping segment are arranged at an angle, the third clamping segment and the second clamping segment are arranged at an angle, the inner side surface of the first clamping segment abuts against the circumferential side wall of the first connecting portion, and the inner side surface of the third clamping segment abuts against the circumferential side wall of the first connecting portion.

[0009] Furthermore, the air tightness detection tool also includes a sealing component, which is arranged between the mounting member and the first connecting portion, and has a first connecting hole; the gas transmission component is inserted into the first connecting hole so that the gas outlet of the gas transmission component is connected with the flow hole.

[0010] Furthermore, the airtightness detection tooling also includes a sealing ring, one end of the sealing ring is connected to the sealing component, and the other end of the sealing ring is used to abut against the axial end face of the first connecting part. A second connecting hole is provided on the sealing ring, and both ends of the second connecting hole are respectively connected to the air outlet and the flow hole of the air transmission component.

[0011] Furthermore, the air tightness detection tooling also includes a moving part, one end of which is connected to the sealing part, and the moving part is movably arranged along a second preset direction; the moving part has a central through hole, and the gas delivery component is passed through the central through hole so that the gas delivery component is passed through the first connecting hole.

[0012] Furthermore, a groove is provided on the surface of the sealing component facing the first connecting portion, and the moving member is inserted into the groove so that the moving member is connected to the sealing component.

[0013] Furthermore, a through hole is provided on the mounting member, the moving member is penetrated in the through hole, and the moving member and the hole wall of the through hole are threadedly connected so that the moving member can be moved along the second preset direction by rotating the moving member.

[0014] Furthermore, a first connection hole is provided on the mounting piece, and a second connection hole is provided on the guide portion, and the guide portion is fastened and connected to the mounting piece by inserting the fastener into the first connection hole and the second connection hole in sequence.

[0015] By applying the technical solution of the utility model, the airtightness detection tool includes a clamping assembly and a gas delivery component. The clamping assembly includes two clamping members arranged opposite to each other. The two clamping members can move toward each other to clamp the first connection part, so that the airtightness detection tool is connected to the first connection part. At this time, the air outlet of the gas delivery component is connected to the flow hole of the first connection part, so that the gas in the external gas source enters the internal cavity of the shell to be tested through the air outlet and the flow hole of the first connection part in turn, so as to conduct subsequent observation of the leakage of the shell to be tested. The user moves the two clamping members to wrap and clamp the first connection part from both sides, so that the airtightness detection tool is connected to the first connection part. The user no longer needs to laboriously put the circular connection structure on the square one-way air permeable device, thereby solving the problem of inconvenient installation of the airtightness detection tool in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 An exploded schematic diagram of an embodiment of an airtightness detection tool according to the utility model is shown;

[0018] Figure 2 A schematic structural diagram of an embodiment of an airtightness detection tool according to the utility model is shown;

[0019] Figure 3 A side view schematic diagram of an embodiment of an airtightness detection tool according to the utility model is shown;

[0020] Figure 4 Shows Figure 3 Cross-sectional view at AA in the middle.

[0021] The above drawings include the following reference numerals:

[0022] 1. Shell to be tested; 2. First connecting part; 10. Mounting part; 21. Sealing part; 41. Air outlet; 30. Clamping assembly; 31. Clamping part; 50. Guide part; 51. Guide groove; 511. Groove wall; 311. Clamping part; 3111. First clamping section; 3112. Second clamping section; 3113. Third clamping section; 312. Positioning part; 11. First connecting hole; 12. Second connecting hole; 13. Fastener; 22. Sealing ring; 40. Air delivery part; 211. First connecting hole; 215. Second connecting hole; 70. Moving part; 18. Through hole; 212. Groove; 120. Handle; 5. Circulation hole; 90. Center through hole; 23. Sealed space. DETAILED DESCRIPTION

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a 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 exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0026] This utility model provides an airtightness detection tool, please refer to Figures 1 to 4 , suitable for a shell 1 to be tested, a first connecting portion 2 is provided on the shell 1 to be tested, a flow hole 5 communicating with the internal cavity of the shell 1 to be tested is provided on the first connecting portion 2, the airtightness detection tooling comprises: a clamping assembly 30 and a gas delivery component 40, the clamping assembly 30 comprises two clamping members 31 arranged opposite to each other, the two clamping members 31 can be arranged to move towards each other to be clamped on the circumferential side wall of the first connecting portion 2; the gas delivery component 40 is located between the two clamping members 31, so that when the clamping member 31 is clamped on the circumferential side wall of the first connecting portion 2, the gas outlet 41 of the gas delivery component is communicated with the flow hole 5.

[0027] The airtightness testing tool of the utility model includes a clamping assembly 30 and a gas delivery component 40. The clamping assembly 30 includes two clamping members 31 arranged opposite to each other. The two clamping members 31 can move toward each other to clamp the first connection part 2, so that the airtightness testing tool is connected to the first connection part 2. At this time, the air outlet 41 of the gas delivery component 40 is connected to the flow hole 5 of the first connection part 2, so that the gas in the external gas source enters the internal cavity of the shell 1 to be tested through the air outlet 41 and the flow hole 5 of the first connection part 2 in turn, so as to conduct subsequent observation of the leakage of the shell 1 to be tested. The user moves the two clamping members 31 to wrap and clamp the first connection part 2 from both sides, so that the airtightness testing tool is connected to the first connection part 2, and the user no longer needs to laboriously set the circular connection structure on the square one-way air permeable device, thereby solving the problem of inconvenient installation of the airtightness testing tool in the prior art.

[0028] Specifically, the gas delivery component 40 is a gas delivery pipe, which is used to connect the external gas source and the first connecting part 2 .

[0029] Specifically, the shell 1 to be tested includes but is not limited to a lithium battery shell. The first connecting portion 2 is a one-way air-permeable device, which refers to a device implemented by a one-way air-permeable membrane or other forms, so that gas can only pass through in a certain direction, including but not limited to a one-way waterproof air-permeable valve; the first connecting portion 2 is threadedly connected to the shell 1 to be tested; air tightness refers to the ability of the shell to prevent gas penetration, and the waterproof performance of the lithium battery shell can be evaluated by air tightness testing.

[0030] In specific implementation, after a set volume of gas is filled into the shell 1 to be tested, the gas input is stopped and maintained for a period of time, and changes in the shell 1 to be tested during the maintenance period are observed, such as whether it expands or whether bubbles appear when the shell 1 to be tested is placed in water.

[0031] When the circular connecting structure in the prior art wraps the one-way breathable device from the four corners, the circular connecting structure occupies a large installation space and even interferes with the lithium battery shell. Therefore, the clamping assembly 30 of the present application can avoid wrapping and clamping the first connecting part 2 from the four corners while realizing the fixed connection between the airtightness detection tooling and the first connecting part 2, thereby reducing the space occupied by the airtightness detection tooling, avoiding interference between the airtightness detection tooling and the shell 1 to be tested, and helping to make the layout of the shell 1 to be tested and the first connecting part more compact.

[0032] In this embodiment, if Figure 1As shown, the air tightness detection tooling also includes a mounting member 10, a clamping assembly 30 can be movably arranged on the mounting member 10, two clamping members 31 are relatively arranged on both sides of the mounting member 10 along a first preset direction, and the two clamping members 31 can be movably arranged toward each other along the first preset direction; the gas delivery component 40 can be movably arranged on the mounting member 10, so that when the clamping member 31 is clamped on the first connecting part 2, the gas delivery component 40 can be movably arranged along the second preset direction toward the direction close to the first connecting part 2, so as to abut against the axial end face of the first connecting part 2, so that the gas outlet 41 of the gas delivery component 40 is connected with the flow hole 5; wherein the first preset direction is arranged perpendicular to the second preset direction.

[0033] Specifically, the two clamping members 31 move toward each other along the first preset direction to clamp the first connecting part 2, so that the airtightness detection tooling is connected to the first connecting part 2. At the same time, the gas delivery component 40 moves along the second preset direction toward the direction close to the first connecting part 2 until it abuts against the axial end face of the first connecting part 2, so as to ensure that the gas outlet 41 of the gas delivery component 40 is connected with the flow hole 5 of the first connecting part 2 at this time, thereby ensuring the test reliability of the airtightness detection tooling.

[0034] In this embodiment, if Figure 2 As shown, a guide portion 50 is provided on the surface of the mounting member 10 close to the first connecting portion 2, and a guide groove 51 extending along the first preset direction is provided in the guide portion 50; each clamping member 31 includes a clamping portion 311 and a limiting portion 312 connected to each other, the clamping portion 311 is used to clamp the first connecting portion 2, and the limiting portion 312 can be movably arranged in the guide groove 51 to enable the two clamping members 31 to move toward each other along the first preset direction.

[0035] Specifically, the guide portion 50 is used to guide the clamping member 31 to prevent the clamping member 31 from moving away from the first preset direction; at the same time, the groove wall 511 of the guide groove 51 limits the clamping member 31 to prevent the clamping member 31 from escaping from the guide groove 51. The limiting portion 312 of each clamping member 31 slides in the guide groove 51, and the two clamping members 31 move toward each other along the first preset direction, thereby causing the clamping portions 311 of the two clamping members 31 to move toward each other along the first preset direction until the two clamping portions 311 are respectively clamped with the two sides of the first connecting portion 2, thereby clamping the first connecting portion 2.

[0036] Specifically, there are two guide portions 50, and the two guide portions 50 are relatively arranged along the third preset direction on the mounting member 10. The first preset direction, the second preset direction and the third preset direction are arranged perpendicular to each other.

[0037] Specifically, the first preset direction is as follows: Figure 3 The horizontal direction shown in , the third preset direction is Figure 3 The vertical direction shown in , the second preset direction is as follows Figure 4 Horizontal direction as shown in .

[0038] In this embodiment, if Figure 2 As shown, along the circumference of the first connecting part 2, the clamping part 311 includes a first clamping section 3111, a second clamping section 3112 and a third clamping section 3113 which are connected in sequence, the first clamping section 3111 and the second clamping section 3112 are arranged at an angle, the third clamping section 3113 and the second clamping section 3112 are arranged at an angle, the inner side surface of the first clamping section 3111 abuts against the circumferential side wall of the first connecting part 2, and the inner side surface of the third clamping section 3113 abuts against the circumferential side wall of the first connecting part 2.

[0039] Specifically, the inner side surface of the first clamping section 3111 and the inner side surface of the third clamping section 3113 are respectively in contact with the two circumferential side walls of the first connection part 2 arranged opposite to each other along the third preset direction, so that the clamping part 311 can fully clamp the first connection part 2, thereby preventing the clamping member 31 from being separated from the first connection part 2, thereby preventing the airtightness detection tool from being separated from the first connection part 2, and ensuring the clamping reliability of the clamping assembly 30. Among them, the inner side surface of the first clamping section 3111 refers to the side surface facing the third clamping section 3113.

[0040] In this embodiment, if Figure 4 As shown, the air tightness detection tooling also includes a sealing component 21, which is arranged between the mounting member 10 and the first connecting portion 2, and the sealing component 21 has a first connecting hole 211; the air delivery component 40 is inserted into the first connecting hole 211 so that the air outlet 41 of the air delivery component 40 is connected to the flow hole 5.

[0041] In this embodiment, if Figure 4 As shown, the air tightness detection tooling also includes a sealing ring 22, one end of the sealing ring 22 is connected to the sealing component 21, and the other end of the sealing ring 22 is used to abut against the axial end face of the first connecting part 2. A second connecting hole 215 is provided on the sealing ring 22, and both ends of the second connecting hole 215 are respectively connected to the air outlet 41 and the flow hole 5 of the air transmission component 40.

[0042] Specifically, a sealed space 23 is formed together by the sealing component 21, the second connecting hole 215 and the first connecting part 2, so that the gas flowing out from the gas source flows into the flow hole 5 of the first connecting part 2 through the outlet 41, the sealing ring 22 and the sealed space 23 in sequence, thereby preventing the gas from escaping to the outside and causing insufficient inflation in the shell 1 to be tested. The sealing component 21 squeezes the sealing ring 22 so that the other end of the sealing ring 22 abuts against the axial end face of the first connecting part 2, thereby ensuring the sealing reliability of the sealed space 23 and further preventing gas overflow.

[0043] Specifically, one end of the gas delivery component 40 is connected to an external gas source, and the other end of the gas delivery component 40 forms a gas outlet 41, which is penetrated in the first connecting hole 211, so that the gas outlet 41 is connected to the flow hole 5 of the first connecting part 2. At the same time, the first connecting hole 211 serves to connect the gas delivery component 40 and the sealing component 21, so that the gas delivery component 40 can move with the sealing component 21, wherein the gas delivery component 40 and the sealing component 21 are also sealed by sealing tape and sealant to prevent gas from escaping from the gap between the gas delivery component 40 and the first connecting hole 211.

[0044] In this embodiment, if Figure 4 As shown, the air tightness detection tooling also includes a moving part 70, one end of which is connected to the sealing part 21, and the moving part 70 is movably arranged along a second preset direction; the moving part 70 has a central through hole 90, and the gas delivery part 40 is passed through the central through hole 90, so that the gas delivery part 40 is passed through the first connecting hole 211.

[0045] Specifically, the moving member 70 has a central through hole 90, and the gas delivery component 40 is passed through the central through hole 90. Such an arrangement can avoid mutual interference between the moving member 70 and the gas delivery component 40, and ensure that the moving member 70 is smoothly connected to the sealing component 21.

[0046] In this embodiment, if Figure 1 As shown, a groove 212 is formed on the surface of the sealing component 21 facing the first connecting portion 2 , and the moving member 70 is inserted into the groove 212 so that the moving member 70 is connected to the sealing component 21 .

[0047] Specifically, the movable member 70 is inserted into the groove 212 to connect with the sealing component 21, thereby ensuring that the movable member 70 can drive the sealing component 21 to move. At this time, the bottom of the groove 212 abuts against the end of the movable member 70 to prevent the movable member 70 from continuing to move.

[0048] In this embodiment, a through hole 18 is provided on the mounting member 10, and the moving member 70 is penetrated in the through hole 18. The moving member 70 and the hole wall of the through hole 18 are threadedly connected so that the moving member 70 can be moved along the second preset direction by rotating it.

[0049] Specifically, Figure 1 As shown, a portion of the moving member 70 is provided with an external thread, and the portion of the moving member 70 is threadedly matched with the through hole 18 so that the moving member 70 can be rotated to move along the second preset direction toward the direction close to the first connecting portion 2.

[0050] Specifically, Figure 3As shown, a handle 120 is provided at one end of the movable member 70 away from the first connecting part. The movable member 70 is rotated by rotating the handle 120, and then the movable member 70 is moved along the second preset direction toward the direction close to the first connecting part 2, wherein a part of the rod section of the movable member 70 is threadedly engaged with the through hole 18, which helps to quickly move the movable member 70 and is convenient for users to use.

[0051] In this embodiment, the mounting member 10 is provided with a first connection hole 11, and the guide portion 50 is provided with a second connection hole 12. The fastener 13 is sequentially inserted into the first connection hole 11 and the second connection hole 12, so that the guide portion 50 is fastened to the mounting member 10. Such a setting ensures the connection reliability between the guide portion 50 and the mounting member 10, avoids the guide portion 50 from being separated from the mounting member 10, and further ensures that the guide portion 50 can guide the clamping member 31.

[0052] Specifically, there are a plurality of first connection holes 11, and the plurality of first connection holes 11 are arranged at intervals along the first preset direction on the mounting member 10. Such an arrangement further ensures the connection reliability between the guide portion 50 and the mounting member 10.

[0053] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0054] The airtightness testing tool of the utility model includes a clamping assembly 30 and a gas delivery component 40. The clamping assembly 30 includes two clamping members 31 arranged opposite to each other. The two clamping members 31 can move toward each other to clamp the first connection part 2, so that the airtightness testing tool is connected to the first connection part 2. At this time, the air outlet 41 of the gas delivery component 40 is connected to the flow hole 5 of the first connection part 2, so that the gas in the external gas source enters the internal cavity of the shell 1 to be tested through the air outlet 41 and the flow hole 5 of the first connection part 2 in turn, so as to conduct subsequent observation of the leakage of the shell 1 to be tested. The user moves the two clamping members 31 to wrap and clamp the first connection part 2 from both sides, so that the airtightness testing tool is connected to the first connection part 2, and the user no longer needs to laboriously set the circular connection structure on the square one-way air permeable device, thereby solving the problem of inconvenient installation of the airtightness testing tool in the prior art.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0057] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An airtightness detection tool, suitable for a shell to be tested (1), wherein the shell to be tested (1) is provided with a first connecting portion (2), and the first connecting portion (2) is provided with a flow hole (5) connected to the internal cavity of the shell to be tested (1), characterized in that: The air tightness detection tooling comprises: A clamping assembly (30) and a gas delivery component (40), wherein the clamping assembly (30) comprises two clamping members (31) arranged opposite to each other, wherein the two clamping members (31) are arranged to be movable towards each other so as to be clamped on the circumferential side wall of the first connecting portion (2); the gas delivery component (40) is located between the two clamping members (31), so that when the clamping members (31) are clamped on the circumferential side wall of the first connecting portion (2), the gas outlet (41) of the gas delivery component is in communication with the flow hole (5).

2. The airtightness detection tool according to claim 1, characterized in that: The airtightness testing tool further comprises a mounting member (10), the clamping assembly (30) is movably arranged on the mounting member (10), the two clamping members (31) are relatively arranged on two sides of the mounting member (10) along a first preset direction, and the two clamping members (31) are movably arranged towards each other along the first preset direction; The gas delivery component (40) is movably arranged on the mounting member (10), so that when the clamping member (31) is clamped on the first connecting portion (2), the gas delivery component (40) is movably arranged along a second preset direction toward a direction close to the first connecting portion (2) to abut against an axial end surface of the first connecting portion (2), so that the gas outlet (41) of the gas delivery component (40) is communicated with the flow hole (5); Wherein, the first preset direction is arranged perpendicular to the second preset direction.

3. The airtightness detection tool according to claim 2, characterized in that: A guide portion (50) is provided on a surface of the mounting member (10) close to the first connecting portion (2), and a guide groove (51) extending along the first preset direction is provided in the guide portion (50); Each of the clamping members (31) comprises a clamping portion (311) and a limiting portion (312) which are connected to each other, the clamping portion (311) being used to clamp the first connecting portion (2), and the limiting portion (312) being movably disposed in the guide groove (51) so as to enable the two clamping members (31) to move toward each other along the first preset direction.

4. The airtightness detection tool according to claim 3, characterized in that: Along the circumference of the first connecting portion (2), the clamping portion (311) comprises a first clamping section (3111), a second clamping section (3112) and a third clamping section (3113) which are connected in sequence, the first clamping section (3111) and the second clamping section (3112) are arranged at an angle, the third clamping section (3113) and the second clamping section (3112) are arranged at an angle, the inner side surface of the first clamping section (3111) abuts against the circumferential side wall of the first connecting portion (2), and the inner side surface of the third clamping section (3113) abuts against the circumferential side wall of the first connecting portion (2).

5. The airtightness detection tool according to claim 2, characterized in that: The airtightness detection tool further comprises a sealing component (21), wherein the sealing component (21) is arranged between the mounting member (10) and the first connecting portion (2), and the sealing component (21) has a first communicating hole (211); The gas delivery component (40) is inserted into the first communication hole (211) so that the gas outlet (41) of the gas delivery component (40) is in communication with the flow hole (5).

6. The airtightness detection tool according to claim 5, characterized in that: The air tightness detection tool further comprises a sealing ring (22), one end of the sealing ring (22) being connected to the sealing component (21), and the other end of the sealing ring (22) being used for abutting against the axial end surface of the first connecting portion (2), and a second communicating hole (215) being provided on the sealing ring (22), and two ends of the second communicating hole (215) being respectively connected to the gas outlet (41) of the gas transmission component (40) and the flow hole (5).

7. The airtightness testing tool according to claim 6, characterized in that: The airtightness detection tool further comprises a moving part (70), one end of which is connected to the sealing component (21), and the moving part (70) is movably arranged along the second preset direction; The moving member (70) has a central through hole (90), and the gas delivery component (40) is arranged through the central through hole (90), so that the gas delivery component (40) is arranged in the first connecting hole (211).

8. The airtightness testing tool according to claim 7, characterized in that: A groove (212) is provided on the surface of the sealing component (21) facing the first connecting portion (2), and the moving member (70) is inserted into the groove (212) so that the moving member (70) is connected to the sealing component (21).

9. The airtightness testing tool according to claim 7, characterized in that: The mounting member (10) is provided with a penetration hole (18), the movable member (70) is penetrated in the penetration hole (18), and the movable member (70) and the hole wall of the penetration hole (18) are threadedly connected so that the movable member (70) can be moved along the second preset direction by rotating it.

10. The airtightness testing tool according to claim 3, characterized in that: The mounting member (10) is provided with a first connection hole (11), and the guide portion (50) is provided with a second connection hole (12); a fastener (13) is sequentially inserted into the first connection hole (11) and the second connection hole (12), so that the guide portion (50) is fastened and connected to the mounting member (10).

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