Air tightness detection tool

Abstract

The utility model discloses an air tightness detection tool, and relates to the technical field of new energy, in particular to an air tightness detection tool which comprises an inner sleeve, the inner sleeve is of a cylindrical structure with an opening at one end, and the side wall and / or the other end of the inner sleeve are / is provided with an air pipe joint communicated with an inner cavity of the inner sleeve; a magnet is arranged in the inner sleeve, and when the open end of the inner sleeve is in contact with the end face of a valve body of the anti-explosion valve in a sealed mode, the magnet can magnetically attract a valve element of the anti-explosion valve to act, so that the anti-explosion valve is communicated with an inner cavity of the inner sleeve. The explosion-proof valve core is attracted to be opened through magnetic force of the magnet in the inner sleeve, internal and external gas exchange is achieved, and operation is simplified. And the opening end of the inner sleeve abuts against the valve body of the explosion-proof valve to seal the joint, and a contact sealing mode is used, so that the problem of air tightness loss caused by long-time use is effectively solved, and the stability of the air tightness test is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and more specifically, to an air tightness detection tool. Background Art

[0002] With the rapid development of the new energy industry, batteries are widely used in new energy vehicles, energy storage, mobile electronics, power tools, and other fields. During the assembly process of individual battery cells into modules and PACKs (cell packaging and integration), the PACK package must be tested for airtightness. This test is completed by connecting the airtightness tester to the PACK package using a test fixture. The design of the airtightness test fixture determines the stability of the airtightness test.

[0003] In the prior art, the plug and connector in the airtightness test tooling are generally connected by an elastic hose, which requires frequent plugging and unplugging during the test, making the operation inconvenient. Long-term use will cause the end of the hose to deform, resulting in loss of airtightness between the plug and the connector, and thus leading to test failure.

[0004] In summary, how to provide an airtightness testing tool that can solve the problems of inconvenience in existing airtightness testing operations and loss of airtightness after long-term use is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide an airtightness detection tool, which uses the magnetic force of the magnet in the inner sleeve to adsorb the valve core of the explosion-proof valve to open, realize the exchange of internal and external gases, and simplify the operation; and uses the open end of the inner sleeve to abut the valve body of the explosion-proof valve to seal the connection, using a contact sealing method to effectively solve the problem of airtightness loss caused by long-term use, and effectively improve the stability of the airtightness test.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] An air tightness testing tool comprises an inner sleeve, wherein the inner sleeve is a cylindrical structure with one end open, and a side wall and / or the other end is provided with an air pipe joint connected to the inner cavity;

[0008] A magnet is provided in the inner sleeve. When the open end of the inner sleeve contacts and seals with the valve body end face of the explosion-proof valve, the magnet can magnetically attract the valve core of the explosion-proof valve to make it move, so that the explosion-proof valve is connected to the internal cavity of the inner sleeve.

[0009] Preferably, an annular groove is provided on the end surface of the opening end of the inner sleeve, and an O-type sealing ring is provided in the annular groove.

[0010] Preferably, a magnet mounting seat is fixedly provided in the inner cavity of the inner sleeve, the magnet is fixedly mounted in the magnet mounting seat, and the front end surface of the magnet is located in the inner sleeve.

[0011] Preferably, a threaded hole is provided in the magnet mounting seat along the axial direction of the inner sleeve, and the magnet is provided in the threaded hole through a threaded connection.

[0012] Preferably, it further comprises an outer sleeve, wherein the inner sleeve is coaxially slidably mounted in the outer sleeve;

[0013] The front end of the outer sleeve is provided with a connector for being fixedly connected to the valve body, and the rear end is provided with a driving assembly for driving the inner sleeve and the outer sleeve to slide relative to each other.

[0014] Preferably, the connecting body is a U-shaped structure, and the inner ring wall is provided with a clamping groove for clamping the convex ring on the outer periphery of the valve body.

[0015] Preferably, a through hole is provided at the rear end of the outer sleeve, a connecting shaft is slidably provided in the through hole, and both ends of the connecting shaft are respectively connected to the inner sleeve and the driving assembly.

[0016] Preferably, the driving assembly is a quick-action clamp fixed to the outer sleeve, and the connecting shaft is hinged to the operating rod of the quick-action clamp.

[0017] Preferably, the side wall of the outer sleeve is provided with a guide groove along the centerline direction;

[0018] The outer wall of the inner sleeve is provided with a guide screw perpendicular to the center line of the inner sleeve;

[0019] The guide screw is slidably mounted in the guide groove.

[0020] Compared with the prior art, the airtightness detection tool provided by the present invention has at least the following beneficial effects:

[0021] 1. The valve core of the explosion-proof valve is activated by magnet adsorption, thereby opening the explosion-proof valve and realizing the exchange of gas inside and outside the PACK package, thereby simplifying the operation of injecting gas into the PACK package and exhausting gas from the PACK package during air tightness testing;

[0022] 2. The open end of the inner sleeve is abutted against the valve body to achieve sealing of the connection position. After the valve core is actuated, the explosion-proof valve is directly connected to the internal cavity of the inner sleeve, and then the interior of the PACK is connected to the air source through the explosion-proof valve, the internal cavity of the inner sleeve and the air pipe joint, realizing a rapid airtight connection of the airtightness test tooling. The contact seal can effectively solve the problem of decreased airtightness after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the specific air tightness detection tooling provided by the utility model;

[0025] Figure 2 This is a cross-sectional view of the specific air tightness detection tooling provided by the utility model;

[0026] Figure 3 This is a schematic diagram of the explosion-proof valve structure provided by the utility model;

[0027] Figure 4 This is a schematic diagram of the assembly of the airtightness detection tooling and PACK provided by the present invention.

[0028] Figure 1-4 middle:

[0029] 1. PACK; 2. Explosion-proof valve; 21. Valve body; 22. Spring; 23. Valve core;

[0030] 31. Outer sleeve; 311. Connector; 312. Guide groove;

[0031] 32. Inner sleeve; 321. Sealing ring; 322. Magnet mounting seat; 323. Magnet; 324. Air pipe connector; 325. Connecting shaft; 326. Guide screw;

[0032] 33. Drive components. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The core of this utility model is to provide an airtightness detection tool, which uses the magnetic force of the magnet in the inner sleeve to adsorb the valve core of the explosion-proof valve to open, realize the exchange of internal and external gases, and simplify the operation; and uses the open end of the inner sleeve to abut the valve body of the explosion-proof valve to seal the connection, using a contact sealing method to effectively solve the problem of airtightness loss caused by long-term use, and effectively improve the stability of the airtightness test.

[0035] Please refer to Figure 3 , Figure 3 It is an explosion-proof valve 2 in the prior art, including a valve body 21, a spring 22 and a valve core 23. A through hole is provided in the middle of the valve body 21, the valve core 23 is slidably installed in the through hole, and the end of the valve core 23 seals the through hole. A spring 22 is provided between the valve core 23 and the valve body 21 along the relative sliding direction, and the spring 22 drives the end of the valve core 23 to press and seal the through hole of the valve body 21.

[0036] See Figure 1 and Figure 2 An airtightness testing tool comprises an inner sleeve 32, which is a cylindrical structure with an open end, and a side wall and / or the other end of the inner sleeve 32 is provided with an air pipe connector 324 connected to the inner cavity thereof;

[0037] A magnet 323 is provided in the inner sleeve 32. When the open end of the inner sleeve 32 contacts and seals with the end face of the valve body 21 of the explosion-proof valve 2, the magnet 323 can magnetically attract the valve core 23 of the explosion-proof valve 2 to make it move, so that the explosion-proof valve 2 and the internal cavity of the inner sleeve 32 are connected.

[0038] The inner sleeve 32 has an open end and a closed end, with the open end enclosing the explosion-proof valve 2. When the explosion-proof valve 2 is open, the inner cavity of the PACK 1 is directly connected to the inner cavity of the inner sleeve 32. By connecting the side wall or the other end of the inner sleeve 32 to the air pipe connector 324, the gas in the PACK 1 can be filled and released. During this process, the open end of the inner sleeve 32 is in contact and sealed with the valve body 21, effectively solving the problem of reduced sealing due to long-term use.

[0039] At the same time, a magnet 323 is provided in the inner sleeve 32. When the open end of the inner sleeve 32 abuts against the valve body 21 to form a sealed cavity, the valve core 23 can be displaced under the magnetic adsorption of the magnet 323, that is, the explosion-proof valve 2 is opened, thereby simplifying the operation process of adding gas to the PACK package 1 or releasing the gas in the PACK package 1.

[0040] In some embodiments, an annular groove is provided on the open end surface of the inner sleeve 32, and an O-shaped sealing ring 321 is provided in the annular groove;

[0041] See Figure 2 By setting an O-shaped sealing ring 321 at the open end of the inner sleeve 32, when the open end of the inner sleeve 32 abuts the valve body 21, the sealing ring 321 can be squeezed and deformed, thereby achieving a soft contact seal between the end of the inner sleeve 32 and the valve body 21, further improving the air tightness, and setting the sealing ring 321 in the annular groove, it is convenient to replace and maintain the sealing ring 321, further extending the service life of the air tightness detection tooling.

[0042] In some embodiments, a magnet mounting seat 322 is fixedly provided in the inner cavity of the inner sleeve 32, and a magnet 323 is fixedly installed in the magnet mounting seat 322, with the front end surface of the magnet 323 being located in the inner sleeve 32;

[0043] See Figure 1 By setting a magnet mounting seat 322 in the inner sleeve 32, the installation of the magnet 323 is facilitated. At the same time, when installing the magnet 323, a gap should be left between the front end surface of the magnet 323 and the end surface of the open end of the inner sleeve 32 so that the magnet 323 can adsorb the valve core 23 and move a certain distance to make the valve hole in the valve body 21 conductive.

[0044] In some embodiments, a threaded hole is provided in the magnet mounting seat 322 along the axis direction of the inner sleeve 32, and the magnet 323 is provided in the threaded hole through a threaded connection;

[0045] like Figure 2 As shown, the magnet 323 is installed in the magnet mounting seat 322 by a threaded connection. By rotating the magnet 323, the embedding amount of the magnet 323 in the magnet mounting seat 322 can be adjusted, that is, the distance between the front end face of the magnet 323 and the open end face of the inner sleeve 32 is adjusted, that is, the distance between the valve core 23 and the magnet 323 when the inner sleeve 32 abuts against the valve body 21 is adjusted, so that the air tightness detection tooling can be applied to explosion-proof valves 2 with springs 22 of different elastic coefficients.

[0046] In some embodiments, an outer sleeve 31 is further included, and an inner sleeve 32 is coaxially slidably mounted in the outer sleeve 31;

[0047] The front end of the outer sleeve 31 is provided with a connector 311 for being fixedly connected to the valve body 21, and the rear end is provided with a driving assembly 33 for driving the inner sleeve 32 and the outer sleeve 31 to slide relative to each other;

[0048] like Figure 1 As shown, an outer sleeve 31 is provided, which is connected and fixed to the explosion-proof valve 2, and a driving component 33 is added to directly drive the inner sleeve 32 to move, such as pushing the inner sleeve 32 to abut against the valve body 21 to make the explosion-proof valve 2 conductive, and with the help of the outer sleeve 31 and the valve body 21 to maintain a relatively stable positional relationship, the explosion-proof valve 2 can remain in a conductive state for a long time, or drive the inner sleeve 32 away from the valve body 21 to close the explosion-proof valve 2.

[0049] In some embodiments, the connecting body 311 is a U-shaped structure, and the inner ring wall is provided with a clamping groove for clamping the convex ring on the outer periphery of the valve body 21;

[0050] like Figure 3 As shown, a convex ring is provided on the outer peripheral surface of the valve body 21. With the help of the U-shaped structure of the connecting body 311 and the clamping groove of the inner ring wall, the convex ring is clamped in the clamping groove to achieve relative fixation of the valve body 21 and the connecting body 311.

[0051] In some embodiments, a through hole is provided at the rear end of the outer sleeve 31, and a connecting shaft 325 is slidably provided in the through hole. The two ends of the connecting shaft 325 are respectively connected to the inner sleeve 32 and the driving assembly 33;

[0052] like Figure 2 As shown, a connecting shaft 325 is provided in the outer sleeve 31 for axial sliding, and is used to connect the inner sleeve 32 and the drive assembly 33, so that the drive assembly 33 can be arranged outside the outer sleeve 31, so that the drive assembly 33 has a larger movable space and will not interfere with the sliding of the inner sleeve 32.

[0053] In some embodiments, the driving assembly 33 is a quick clamp fixed to the outer sleeve 31, and the connecting shaft 325 is hinged to the operating rod of the quick clamp;

[0054] like Figure 1 As shown, a quick-action clamp is used as the driving component 33. When its operating rod overlaps axially with the connecting shaft 325, it can push the inner sleeve 32 to move forward and can self-lock in this position, thereby ensuring that there is sufficient positive pressure between the front end surface of the inner sleeve 32 and the valve body 21 to ensure sealing at the contact position;

[0055] When the operating rod is bent downward, it can drive the inner sleeve 32 to move backward and separate from the explosion-proof valve 2, making it easier to separate the air tightness detection tooling as a whole from the explosion-proof valve 2;

[0056] In some embodiments, the drive assembly 33 uses a cylinder, an electric screw, etc., which are all within the scope of protection of this application.

[0057] In some embodiments, the side wall of the outer sleeve 31 is provided with a guide groove 312 along the centerline direction;

[0058] A guide screw 326 is provided on the outer wall of the inner sleeve 32 perpendicular to the centerline thereof;

[0059] The guide screw 326 is slidably mounted in the guide slot 312;

[0060] like Figure 1 As shown, by providing a guide screw 326 on the outside of the inner sleeve 32 and using it in combination with the guide groove 312 of the outer sleeve 31, the inner sleeve 32 is prevented from rotating during movement.

[0061] In actual use, such as Figure 4As shown, the air guide tube of the gas source is connected to the air pipe connector 324, and then the inner sleeve 32 is first moved to the rear position inside the outer sleeve 31, and the connector 311 is combined with the valve body 21 of the explosion-proof valve 2 on the PACK package 1. Then, the driving component 33 is operated to make the front end of the inner sleeve 32 abut against the valve body 21, and the magnet 323 attracts the valve core 23 to make it operate, so that the explosion-proof valve 2 is turned on. At this time, gas exchange can be carried out between the gas source and the PACK package 1.

[0062] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0063] The above is a detailed introduction to the airtightness detection tooling provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An airtightness detection tool, characterized in that: The inner sleeve (32) is a cylindrical structure with one end open, and a trachea connector (324) communicating with the inner cavity of the inner sleeve is provided on the side wall and / or the other end; A magnet (323) is provided in the inner sleeve (32). When the open end of the inner sleeve (32) contacts and seals with the end face of the valve body (21) of the explosion-proof valve (2), the magnet (323) can magnetically attract the valve core (23) of the explosion-proof valve (2) to activate the valve, thereby causing the explosion-proof valve (2) to communicate with the internal cavity of the inner sleeve (32).

2. The airtightness detection tool according to claim 1, characterized in that: An annular groove is provided on the open end surface of the inner sleeve (32), and an O-shaped sealing ring (321) is provided in the annular groove.

3. The airtightness detection tool according to claim 1, characterized in that: A magnet mounting seat (322) is fixedly provided in the inner cavity of the inner sleeve (32), the magnet (323) is fixedly mounted in the magnet mounting seat (322), and the front end surface of the magnet (323) is located in the inner sleeve (32).

4. The airtightness detection tool according to claim 3, characterized in that: A threaded hole is provided in the magnet mounting seat (322) along the axial direction of the inner sleeve (32), and the magnet (323) is provided in the threaded hole through a threaded connection.

5. The airtightness testing tool according to any one of claims 1 to 4, characterized in that: It also includes an outer sleeve (31), wherein the inner sleeve (32) is coaxially slidably mounted in the outer sleeve (31); The front end of the outer sleeve (31) is provided with a connecting body (311) for being fixedly connected to the valve body (21), and the rear end is provided with a driving assembly (33) for driving the inner sleeve (32) and the outer sleeve (31) to slide relative to each other.

6. The airtightness testing tool according to claim 5, characterized in that: The connecting body (311) is a U-shaped structure, and the inner ring wall is provided with a clamping groove for clamping the convex ring on the outer periphery of the valve body (21).

7. The airtightness testing tool according to claim 5, characterized in that: A through hole is provided at the rear end of the outer sleeve (31), a connecting shaft (325) is slidably provided in the through hole, and both ends of the connecting shaft (325) are respectively connected to the inner sleeve (32) and the driving assembly (33).

8. The airtightness testing tool according to claim 7, characterized in that: The driving assembly (33) is a quick clamp fixed to the outer sleeve (31), and the connecting shaft (325) is hinged to the operating rod of the quick clamp.

9. The airtightness testing tool according to claim 5, characterized in that: A guide groove (312) is provided on the side wall of the outer sleeve (31) along the centerline direction; A guide screw (326) is provided on the outer wall of the inner sleeve (32) perpendicular to the centerline thereof; The guide screw (326) is slidably mounted on the guide groove (312).

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