Air tightness detection mechanism

Abstract

The air tightness detection mechanism comprises a housing, an installation part, a driving member, a plugging member, an adsorption member, a sealing member and an inflation member, one end of the housing is open, the opening is provided with the installation part, the other end of the housing is provided with the driving member, and an output end of the driving member extends into a housing cavity and is connected with the plugging member. The driving piece is configured to drive the blocking piece to move in the length direction of the shell; the middle part of the plugging piece facing the mounting part is concave inwards to form a space, and an adsorption piece is arranged in the space and does not exceed the outer edge surface of the plugging piece; and the space is communicated with the inflating piece. The beneficial effects of the utility model are that the internal part is inflated by the over-inflation member, and the air tightness is checked.

Description

Technical Field

[0001] This utility model relates to the field of battery pack manufacturing technology, and in particular to an airtightness testing mechanism. Background Technology

[0002] During battery pack production, testing the airtightness of the battery pack is a crucial safety test step. The testing process involves sealing the explosion-proof valve inside the enclosure and then inflating it with air to achieve the purpose of testing the battery pack's airtightness.

[0003] However, the current method for testing the airtightness of explosion-proof valves in battery packs is not to directly inflate the valve itself, but to indirectly infer the airtightness of the valve by inflating the enclosure. This method is not only complex, but the airtightness test results are also affected by the airtightness of the enclosure itself, which can easily lead to inaccurate results.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to solve the problem of inaccurate airtightness detection of explosion-proof valves caused by indirect testing.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] This utility model claims a protective airtightness testing mechanism, including a shell, a mounting part, a driving component, a sealing component, an adsorption component, a sealing component, and an inflation component. One end of the shell is open, and the mounting part is provided at the open end. The driving component is provided at the other end of the shell. The output end of the driving component extends into the shell cavity and is connected to the sealing component. The driving component is configured to drive the sealing component to move along the length direction of the shell. The sealing component facing the mounting part has a recessed space in the middle, and the adsorption component is provided in the space. The adsorption component does not extend beyond the outer edge of the sealing component. The space is connected to the inflation component.

[0008] This utility model installs an explosion-proof valve through an installation part. The driving component simultaneously moves the sealing component and the adsorption component. The adsorption component is used to adsorb the valve cover of the explosion-proof valve, so that there is a gap between the valve cover and the valve body of the explosion-proof valve. The outer edge of the sealing component is squeezed and fitted with the valve port of the explosion-proof valve, so as to realize the connection between the valve cavity, gap and space of the explosion-proof valve. The airtightness is checked by inflating the inside of the valve through the inflation component.

[0009] Preferably, the outer casing includes a housing and a cover. The housing is a cylindrical shape with openings at both ends. One end of the housing is sealed with the cover, and the other end of the housing is open. At least two locking blocks are axially protruding at the open end. An installation distance is reserved between at least one adjacent locking block. The locking blocks have a circular petal structure. The locking blocks are arranged concentrically with the housing. The inner wall of the locking blocks has a circumferential groove. The groove and the inner wall of the locking blocks form a stepped locking opening. The locking blocks constitute the mounting part.

[0010] The engagement between the bayonet and the flange formed at the outer edge of the valve body enables rapid installation of the outer shell and the explosion-proof valve.

[0011] Preferably, the driving component includes an adjustment unit and a guide unit. The adjustment unit is provided on the cover, a sealing element is provided at the bottom of the adjustment unit, and a guide unit is provided between the sealing element and the housing.

[0012] The guide unit ensures that the sealing component does not shift or rotate synchronously when the adjustment unit adjusts the sliding of the sealing component.

[0013] Preferably, the adjusting unit includes a nut and a screw, with the nut coaxially mounted on the end cap. The nut engages with the screw, which extends into the housing and is connected to the sealing component.

[0014] The adjustment of the nut and screw has high precision, which better meets the adjustment requirements of the airtightness testing mechanism.

[0015] Preferably, the guiding unit includes a guide block and a guide groove. The guide groove is formed on the inner wall of the housing. The length of the guide groove is parallel to the axis of the housing. The guide groove and the guide blocks protruding on both sides of the outer wall of the sealing component form a guiding fit.

[0016] By setting guide blocks on the outer wall of the sealing component, and sliding the guide blocks in the guide groove, the sealing component is guided.

[0017] Preferably, the sealing member has a cylindrical structure, and a second circular hole is coaxially opened at the end of the sealing member facing the block, forming a space.

[0018] The sealing component is cylindrical and can fit snugly against the inner wall of the housing, preventing it from flipping or tipping over when it slides.

[0019] Preferably, the sealing element facing the card block has a first annular hole coaxially formed, the inner diameter of the first annular hole is larger than the diameter of the second annular hole, and a sealing element is coaxially arranged inside the first annular hole.

[0020] The inner diameter of the first annular hole is larger than the diameter of the second annular hole to ensure that the first annular hole forms a complete annular groove, which facilitates the installation of the seal.

[0021] Preferably, the inflation assembly includes an air tube and an air source, with one end of the air tube communicating with the space and the other end of the air tube passing through the cover and communicating with the air source.

[0022] The trachea extends outside the outer shell and connects to the air source, ensuring the overall portability of the airtightness testing mechanism.

[0023] Preferably, the inflation assembly further includes a first connector and a second connector. A connecting groove is formed on the surface of the sealing member facing the block. A first mounting hole extends axially through the connecting groove. One end of the air pipe is connected to the first mounting hole through the first connector. The air pipe passes through the second mounting hole provided on the end cap. The other end of the air pipe is connected to the air source through the second connector.

[0024] The first and second connectors ensure the airtightness of the airtightness testing mechanism.

[0025] Preferably, the screw end located outside the housing is connected to a handle.

[0026] The handle makes it easy for people to hold and adjust. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the airtightness testing mechanism in Embodiment 1 of this utility model;

[0028] Figure 2 This is a cross-sectional view of the airtightness testing mechanism in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the outer shell in Embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the drive component in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the sealing component of this utility model.

[0032] 1. Outer shell; 10. Housing; 101. First slot; 11. Cover; 110. First insert block;

[0033] 20. Card block; 201. Card slot;

[0034] 301. Nut; 302. Screw; 303. Handle; 310. Guide block; 311. Guide groove;

[0035] 4. Sealing component; 40. Second circular hole; 41. First annular hole; 42. Connecting groove;

[0036] 5. Adsorption components;

[0037] 6. Sealing components;

[0038] 70. Trachea; 71. First connector; 72. Second connector.

[0039] 80. Valve cover; 81. Valve body; 810. Flange; Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] See Figure 1 , Figure 2 This embodiment requires a protective airtightness testing mechanism, including a housing 1, a mounting part, a driving component, a sealing component 4, an adsorption component 5, a sealing component 6, and an inflation component.

[0042] The outer casing 1 includes a housing 10 and a cover 11. The housing 10 is a cylindrical shape with openings at both ends. The opening at the top is defined as the first opening, and the cover 11 is sealed at the first opening.

[0043] The housing 10 and the cover 11 are designed to be detachable primarily for the assembly and disassembly of the sealing component 4. They can be connected to each other using clips or bolts. Preferably, the cover 11 is partially inserted into the first cylindrical opening. Specifically, first slots 101 are formed on both sides of the inner wall of the first cylindrical opening along the axial direction of the housing 10. The first slots 101 are arc grooves. The first slots 101 and the first inserts 110 protruding on both sides of the cover 11 form an insertion fit. In actual installation, the first inserts 110 are directly aligned with the first slots 101, and the cover 11 is inserted into the first cylindrical opening along the axial direction of the housing 10. The first cylindrical opening and the cover 11 are preferably interference-fitted. In this way, the housing 10 and the cover 11 are detachably connected, and the connection is not easily detached after insertion. Of course, in actual production, the housing 10 and the cover 11 can also be designed as a single piece.

[0044] See Figure 1 , Figure 2 and Figure 3 The bottom opening is defined as the second opening, and a mounting part is provided at the second opening. The mounting part includes two locking blocks 20 protruding axially from the second opening. The locking blocks 20 have a circular petal structure and are concentrically arranged with the second opening. The inner diameter of the locking block 20 is the same as the inner wall diameter of the second opening, and the outer diameter of the locking block 20 is the same as the outer wall diameter of the second opening. The two locking blocks 20 are located on one side of the second opening, leaving a space between them for installation. A circumferential groove 201 is formed on the inner wall of the locking block 20, and the groove 201 and the inner wall of the locking block 20 form a stepped locking opening.

[0045] The locking block 20 and the housing 10 are preferably integrated to ensure overall strength. The number of locking blocks 20 is not limited to two, but it is necessary to ensure that at least one adjacent locking block 20 has a reserved installation distance. The installation distance refers to the diameter of the explosion-proof valve installed in the mounting part. The locking slot refers to the groove 201 formed by the concave inner wall of the locking block 20 near the housing 10. The groove 201 and the relatively convex inner wall of the locking block 20 form a stepped structure. The shape and position of the locking slot are compatible with the flange 810 formed at the outer edge of the valve body 81 of the explosion-proof valve.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A driving component is coaxially mounted on the cover 11. The bottom of the driving component extends into the housing 10 and is connected to the sealing component 4. The driving component includes an adjustment unit and a guide unit. The adjustment unit is mounted on the cover 11. Specifically, the adjustment unit includes a handle 303, a nut 301, and a screw 302. The nut 301 is coaxially mounted on the end cover. The nut 301 meshes with the screw 302. The top end of the screw 302 is connected to the handle 303. The bottom end of the screw 302 extends into the housing 10 and is rotatably engaged with the sealing component 4.

[0047] Nut 301 is preferably flange nut 301. Cover 11 is coaxially through the through hole, and flange nut 301 is coaxially inserted into the through hole. Fastening bolts pass through the flange mounting hole of flange nut 301 and are threadedly connected to cover 11.

[0048] The connection between the screw 302 and the sealing member 4 is specifically as follows: a boss is coaxially provided on the upper surface of the sealing member 4, and the boss and the sealing member 4 are connected by a second fastening bolt. A stepped hole is coaxially opened on the bottom surface of the boss, and the diameter of the upper hole is larger than that of the lower hole. A matching stepped shaft is coaxially inserted in the stepped hole, and the top of the stepped shaft is threaded to the bottom end of the screw 302. Furthermore, to ensure the stability of the boss installation, preferably, the second fastening bolts are arranged in a ring array along the driving member.

[0049] The handle 303 is designed to facilitate handholding. The handle 303 and the screw 302 can be formed by welding or integrally. In this application, the top of the screw 302 is preferably stepped shaft-shaped. The top of the screw 302 is inserted into the stepped hole at the bottom of the handle 303. The bolt passes through the handle 303 and engages with the top of the screw 302 to fix the screw 302 and the handle 303.

[0050] A guide unit is provided between the sealing component 4 and the housing 10. The guide unit includes a guide block 310 and a guide groove 311. The guide groove 311 is opened on the inner wall of the housing 10. The length of the guide groove 311 is parallel to the axis of the housing 10. The guide groove 311 and the guide block 310 protruding from the outer wall of the sealing component 4 form a guiding fit.

[0051] The guide block 310 and the sealing component 4 are integrated. The guide groove 311 and the first slot 101 are staggered to avoid interference when the sealing component 4 slides.

[0052] The bottom center of the sealing component 4 is recessed to form a space, and an adsorption component 5 is installed in the space. The adsorption component 5 does not extend beyond the outer edge of the sealing component 4. The sealing component 4 has a cylindrical structure, and a second circular hole 40 is coaxially opened at the end of the sealing component 4 facing the block 20. The cavity of the second circular hole 40 forms a space.

[0053] The adsorption element 5 is preferably a magnet, which can form a magnetic adsorption effect with the magnetic material on the valve cover 80 of the explosion-proof valve. The adsorption element 5 not exceeding the outer edge of the sealing element 4 means that the adsorption element 5 is completely located within the second circular hole 40, and the height of the adsorption element 5 is less than the depth of the second circular hole 40.

[0054] A sealing element 6 is provided on the outer edge of the sealing element 4. The sealing element 4 facing the block 20 has a first annular hole 41 coaxially formed. The inner diameter of the first annular hole 41 is larger than the diameter of the second circular hole 40. The sealing element 6 is coaxially provided inside the first annular hole 41.

[0055] The inner diameter of the first annular hole 41 is larger than the diameter of the second annular hole 40, so that a complete annular groove is formed between the first annular hole 41 and the bottom end face of the sealing member 4. The annular groove can accommodate the sealing member 6, which is preferably a sealing ring.

[0056] The space is connected to the inflation component. The inflation component includes an air tube 70, an air source, a first connector 71, and a second connector 72. A connecting groove 42 is opened on the surface of the sealing component 4 facing the block 20. A first mounting hole passes through the connecting groove 42 along the axial direction. One end of the air tube 70 is connected to the first mounting hole through the first connector 71. The air tube 70 passes through the second mounting hole provided on the end cap. The other end of the air tube 70 is connected to the air source through the second connector 72.

[0057] The connecting groove 42 is preferably a straight groove or a cross-shaped groove, mainly to reserve enough installation space for the first mounting hole. The air source is preferably air, which is filled into the air pipe 70 by an air pump.

[0058] The process by which this airtightness testing agency tests the airtightness of explosion-proof valves is as follows:

[0059] Step 1: Install the valve body 81 at the mounting part. Specifically, place the valve body 81 on one side of the locking block 20, align the flange 810 on the valve body 81 with the locking groove 201. Since the installation distance reserved between the locking blocks 20 is greater than the diameter of the valve body 81, the valve body 81 can be pushed towards the middle of the locking block 20 until the flange 810 engages with the locking groove 201.

[0060] Step two involves adjusting the drive assembly. Specifically, rotating handle 303 engages screw 302 with nut 301. Due to the guiding action of guide block 310 and guide groove 311, sealing component 4 moves until sealing component 6 just contacts the valve port. At this point, suction component 5 suctions valve cover 80, leaving a gap between valve cover 80 and valve body 81. Since suction component 5 does not extend beyond the edge of sealing component 4, even when screw 302 continues to engage with nut 301, although sealing component 6 is in close contact with the valve port, a gap remains between valve cover 80 and valve body 81. Throughout this process, rotating screw 302 twice not only prevents air exchange between the valve body 81 and the outside environment but also creates a gap between valve cover 80 and valve body 81, facilitating inflation by the inflation assembly.

[0061] Step 3: The air source enters the sealing component 4 through the air pipe 70, then enters the gap through the sealing component 4, and enters the valve body 81 through the gap, thereby realizing the airtightness detection of the valve body 81.

[0062] Step four: After the test is completed, rotate handle 303 in the opposite direction to move the sealing component 4 inside the device upward. When it moves to a certain position, the sealing component 6 will separate from the valve body 81. When the sealing component 4 continues to move upward, the adsorption component 5 will separate from the valve cover 80 on the valve body 81, and the gap between the valve cover 80 and the valve body 81 will disappear, thus ensuring the airtightness of the valve body 81.

[0063] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An airtightness testing mechanism, characterized in that, The device includes a housing (1), a mounting part, a driving component, a sealing component (4), an adsorption component (5), a sealing component (6), and an inflation component. One end of the housing (1) is open, and the mounting part is provided at the open end. The driving component is provided at the other end of the housing (1). The output end of the driving component extends into the cavity of the housing (1) and is connected to the sealing component (4). The driving component is configured to drive the sealing component (4) to move along the length direction of the housing (1). The sealing component (4) facing the mounting part has a recessed space in the middle, and the adsorption component (5) is provided in the space. The adsorption component (5) does not extend beyond the outer edge of the sealing component (4). The space is connected to the inflation component.

2. The airtightness testing mechanism according to claim 1, characterized in that, The outer shell (1) includes a shell (10) and a cover (11). The shell (10) is a cylindrical shape with openings at both ends. One end of the shell (10) is sealed with the cover (11), and the other end of the shell (10) is open. At least two locking blocks (20) are axially protruding at the open end. An installation distance is reserved between at least one adjacent locking block (20). The locking block (20) has a circular petal structure. The locking block (20) is arranged concentrically with the shell (10). The inner wall of the locking block (20) has a circumferential groove (201). The groove (201) and the inner wall of the locking block (20) form a stepped locking opening. The locking block (20) constitutes the mounting part.

3. The airtightness testing mechanism according to claim 2, characterized in that, The driving component includes an adjustment unit and a guide unit. The adjustment unit is provided on the cover (11), and a sealing element (4) is provided at the bottom of the adjustment unit. A guide unit is provided between the sealing element (4) and the housing (10).

4. The airtightness testing mechanism according to claim 3, characterized in that, The adjustment unit includes a nut (301) and a screw (302). The nut (301) is coaxially mounted on the end cover. The nut (301) meshes with the screw (302). The screw (302) extends into the housing (10) and is interchangeably fitted with the sealing component (4).

5. The airtightness testing mechanism according to claim 3, characterized in that, The guiding unit includes a guide block (310) and a guide groove (311). The guide groove (311) is opened on the inner wall of the housing (10). The length of the guide groove (311) is parallel to the axis of the housing (10). The guide groove (311) and the guide blocks (310) protruding on both sides of the outer wall of the sealing component (4) form a guiding fit.

6. The airtightness testing mechanism according to claim 1, characterized in that, The sealing component (4) has a cylindrical structure. The end of the sealing component (4) facing the block (20) has a second circular hole (40) coaxially formed, and the cavity of the second circular hole (40) forms a space.

7. The airtightness testing mechanism according to claim 6, characterized in that, The sealing member (4) facing the card block (20) has a first annular hole (41) coaxially formed. The inner diameter of the first annular hole (41) is larger than the diameter of the second annular hole (40). A sealing member (6) is coaxially arranged inside the first annular hole (41).

8. The airtightness testing mechanism according to claim 1, characterized in that, The inflation assembly includes an air tube (70) and an air source. One end of the air tube (70) is connected to the space, and the other end of the air tube (70) passes through the cover (11) and is connected to the air source.

9. The airtightness testing mechanism according to claim 8, characterized in that, The inflation assembly also includes a first connector (71) and a second connector (72). A connecting groove (42) is opened on the surface of the sealing member (4) facing the block (20). A first mounting hole is axially penetrated in the connecting groove (42). One end of the air pipe (70) is connected to the first mounting hole through the first connector (71). The air pipe (70) passes through the second mounting hole provided on the end cap. The other end of the air pipe (70) is connected to the air source through the second connector (72).

10. The airtightness testing mechanism according to claim 2, characterized in that, A handle (303) is connected to the end of the screw (302) located outside the housing (10).

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