Airtightness detection tool

Abstract

The airtightness detection tool comprises a base, a sealing assembly, a connector and a magnetic attraction piece, the base comprises an installation part, a containing cavity and an assembly opening communicated with the containing cavity are formed in the installation part, the sealing assembly comprises a sealing part, the sealing part and the installation part are in sliding fit in the axis direction of the containing cavity, the sealing part penetrates through the installation part, and the magnetic attraction piece is arranged on the connector. An air inlet chamber is formed in the sealing part towards the assembling opening, the sealing part is used for abutting against the anti-explosion valve to seal the air inlet chamber, a communicating hole is formed in the sealing part, one end of the communicating hole communicates with the air inlet chamber, the connector is connected with the end, penetrating out of the installing part, of the sealing part, the connector communicates with the communicating hole, and the connector is used for being externally connected with detection equipment; the magnetic attraction piece is used for being magnetically attracted to the anti-explosion valve so as to drive the sealing part to abut against the anti-explosion valve. The air tightness detection tool solves the technical problem that the air tightness detection operation is complex so as to improve the air tightness detection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection field especially relates to airtightness detection frock. BACKGROUND

[0002] In the current airtightness detection field, with the development of industrial automation and precision manufacturing technology, the airtightness requirement of sealed structure such as box is higher and higher. At present, airtightness detection usually adopts the way of separating air pipe and plug for testing. This method forms a closed space by installing a sealing cover at the waterproof breather valve and locking with screws, drilling a hole in the sealing cover and inserting an air pipe, and coating sealing glue around to assist filling, to ensure that the air pipe does not leak, thereby realizing the detection of the airtightness of the box.

[0003] But during airtightness detection, not only the air pipe needs to be connected, but also the sealing glue needs to be coated for auxiliary filling, which makes the operation of airtightness detection complex and the efficiency low. UTILITY MODEL CONTENTS

[0004] One purpose of the utility model is to provide a kind of airtightness detection frock, which aims to solve the technical problem that airtightness detection operation is complex, to improve the efficiency of airtightness detection.

[0005] To achieve the above purpose, one scheme provided by the utility model is: a kind of airtightness detection frock, characterized by comprising: base, the base includes mounting portion, the inside of mounting portion is formed with accommodating cavity and the assembly opening being communicated with accommodating cavity;

[0006] Sealing assembly, the sealing assembly includes sealing portion, the sealing portion and the mounting portion are slidably fitted along the axis direction of accommodating cavity, the sealing portion is arranged in the mounting portion, the sealing portion is formed with air inlet chamber towards assembly opening, the sealing portion is used to abut against explosion-proof valve to seal air inlet chamber, the sealing portion is provided with communication hole, one end of communication hole is communicated with air inlet chamber;

[0007] Connector, the end of connector penetrating mounting portion is connected with sealing portion, connector is communicated with communication hole, connector is used to connect detection equipment outside;

[0008] Magnetic attraction piece, magnetic attraction piece is arranged in sealing portion, magnetic attraction piece is used to magnetically attract explosion-proof valve to drive sealing portion to abut against explosion-proof valve.

[0009] Optionally, the sealing portion includes cover body and rod body connected with each other, the cover body is arranged in the accommodating cavity and slidably fitted with the mounting portion, the air inlet chamber is formed in the cover body, the cover body is used to abut against explosion-proof valve to seal air inlet chamber, the rod body is arranged in the mounting portion, and the communication hole is arranged in the rod body.

[0010] Optionally, the base includes guide ring, the guide ring is arranged in the mounting portion, the rod body is arranged in the guide ring, and the outer circumferential surface of the rod body is opposite to the guide ring.

[0011] Optionally, the airtightness detection tool comprises a driving assembly.

[0012] The driving assembly comprises an elastic member, the elastic member is assembled in the accommodating cavity, one end of the elastic member is connected with the cover body, the other end of the elastic member is connected with the mounting portion, the elastic member is in a compressed state, and the rod body passes through the elastic member.

[0013] Optionally, the driving assembly comprises a handle, the handle is provided with a connecting hole, a connecting section is formed on the part of the rod body passing out of the mounting portion, and the connecting section is matched with the connecting hole to limit rotation of the rod body relative to the handle.

[0014] Optionally, the base comprises a positioning portion, the positioning portion and the mounting portion are connected at the position of the assembly opening and extend towards the assembly opening, the positioning portion and the mounting portion surround to form an insertion slot, the insertion slot is used for partially inserting the explosion-proof valve into the assembly opening along an axis direction perpendicular to the accommodating cavity, and the positioning portion is used for limiting movement of the explosion-proof valve along the axis direction of the accommodating cavity.

[0015] Optionally, the positioning portion is arranged around the axis of the accommodating cavity.

[0016] Optionally, an inner wall of the accommodating cavity is provided with a sliding groove in the axis direction of the accommodating cavity, the sealing portion comprises a sliding block, the sliding block is connected with the cover body, and the sliding block and the sliding groove are in sliding fit.

[0017] Optionally, the sealing portion is provided with a nested positioning slot and a ventilation slot towards the assembly opening, one end of the ventilation slot is communicated with the air inlet chamber, the other end of the ventilation slot is communicated with the connecting hole, the depth of the ventilation slot is greater than the depth of the positioning slot, and the positioning slot is used for accommodating the magnetic member.

[0018] Optionally, the sealing assembly comprises a sealing ring, the sealing ring is arranged on the side of the sealing portion facing the assembly opening, and the sealing ring is used for sealing the gap between the sealing portion and the explosion-proof valve.

[0019] The airtightness detection tool has the beneficial effects that:

[0020] The airtightness detection tool comprises a base, a sealing assembly, a connector and a magnetic member, the base comprises a mounting portion, the mounting portion is internally formed with an accommodating cavity and an assembly opening communicated with the accommodating cavity, the sealing assembly comprises a sealing portion, the sealing portion and the mounting portion are in sliding fit along the axis direction of the accommodating cavity, the sealing portion passes through the mounting portion, the sealing portion is formed with an air inlet chamber towards the assembly opening, the sealing portion is used for abutting against the explosion-proof valve to seal the air inlet chamber, the sealing portion is provided with a connecting hole, one end of the connecting hole is communicated with the air inlet chamber, the connector is connected with one end of the sealing portion passing out of the mounting portion, the connector is communicated with the connecting hole, the connector is used for being connected with a detection device, and the magnetic member is arranged on the sealing portion and used for being magnetically attracted with the explosion-proof valve to drive the sealing portion to abut against the explosion-proof valve.

[0021] When the battery pack air tightness is detected, if the battery pack air tightness meets the standard, no gas passes through the explosion-proof valve into the air-tight chamber, the communication hole and the joint in turn, at this time the detection equipment detects no gas leakage through the explosion-proof valve, if the battery pack air tightness does not meet the standard, the gas passes through the explosion-proof valve into the air-tight chamber, the communication hole and the joint in turn, at this time the detection equipment detects gas leakage through the explosion-proof valve. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0023] Figure 1 is the overall structure schematic diagram of the air tightness detection tool provided by the embodiment of the present application;

[0024] Figure 2 is the exploded view of the air tightness detection tool provided by the embodiment of the present application;

[0025] Figure 3 is the local structure schematic diagram for showing the positional relationship of the communication hole and the air passage provided by the embodiment of the present application;

[0026] Figure 4 is the structure schematic diagram for showing the positional relationship of the magnetic attraction member and the positioning groove provided by the embodiment of the present application;

[0027] Figure 5 is the overall structure schematic diagram of the air tightness detection tool provided by the embodiment of the present application; Figure 4 is the sectional structure schematic diagram of the A-A position in the above.

[0028] Explanation of the drawings:

[0029] 20, base; 21, mounting part; 211, containing cavity; 212, sliding groove; 213, insertion slot; 214, assembly opening; 22, guide ring; 23, positioning part; 30, sealing assembly; 31, sealing part; 311, cover body; 3111, positioning groove; 3112, air passage; 3113, air inlet chamber; 312, rod body; 3121, connecting section; 3122, communication hole; 313, sliding block; 32, sealing ring; 40, driving assembly; 41, elastic member; 42, handle; 421, connecting hole; 50, magnetic attraction member; 60, explosion-proof valve; 70, joint. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] Please refer to Figures 1 to 3 , Figure 1 is a schematic diagram of the overall structure of the air tightness detection tool provided by the embodiments of the present application, Figure 2 is an exploded view of the air tightness detection tool provided by the embodiments of the present application, Figure 3 is a partial structure schematic diagram for showing the positional relationship between the communication hole 3122 and the air vent groove 3112.

[0032] The embodiments of the present application provide an air tightness detection tool, which comprises a base 20, a sealing assembly 30, a joint 70 and a magnetic attraction piece 50. The base 20 comprises a mounting portion 21, and the mounting portion 21 is internally formed with an accommodating cavity 211 and an assembly opening 214 in communication with the accommodating cavity 211. The sealing assembly 30 comprises a sealing portion 31, and the sealing portion 31 and the mounting portion 21 are slidingly fitted along the axial direction of the accommodating cavity 211. The sealing portion 31 is arranged through the mounting portion 21. The sealing portion 31 is formed with an air inlet chamber 3113 facing the assembly opening 214. The sealing portion 31 is used to abut against an explosion-proof valve 60 to seal the air inlet chamber 3113. The sealing portion 31 is provided with a communication hole 3122, one end of which is in communication with the air inlet chamber 3113. The joint 70 is connected to one end of the sealing portion 31 penetrating through the mounting portion 21. The joint 70 is in communication with the communication hole 3122. The joint 70 is used to externally connect a detection device. The magnetic attraction piece 50 is arranged on the sealing portion 31. The magnetic attraction piece 50 is used to magnetically attract the explosion-proof valve 60 to drive the sealing portion 31 to abut against the explosion-proof valve 60.

[0033] In practice, the explosion-proof valve 60 is made of magnetic material. Before performing a battery pack airtightness test, the testing device's connector 70 is installed on the sealing portion 31, connecting the connector 70 to the communication hole 3122. The explosion-proof valve 60 is then placed in the accommodating cavity 211 at the assembly opening 214. The sealing portion 31 is then moved toward the assembly opening 214 until the magnetic element 50 and the explosion-proof valve 60 are magnetically attracted. At this point, the sealing portion 31 is pressed against and fixed to the explosion-proof valve 60, sealing the air inlet chamber 3113. The battery pack can then be tested for airtightness without the need for applying sealant, which improves the efficiency of the airtightness test. When testing the air tightness of the battery pack, if the air tightness of the battery pack meets the standards, no gas will enter the airtight chamber, the connecting hole 3122 and the connector 70 in sequence through the explosion-proof valve 60. At this time, the detection equipment detects that there is no gas leakage through the explosion-proof valve 60. If the air tightness of the battery pack does not meet the standards, the gas will enter the airtight chamber, the connecting hole 3122 and the connector 70 in sequence through the explosion-proof valve 60. At this time, the detection equipment detects that there is gas leakage through the explosion-proof valve 60.

[0034] In this embodiment, the material of the magnetic member 50 is permanent ferrite. In other embodiments of the present application, the material of the magnetic member 50 can be neodymium iron boron magnet, samarium cobalt magnet, alnico magnet or iron chromium cobalt magnet.

[0035] Further, see Figure 4 and Figure 5 The sealing part 31 includes a cover body 311 and a rod body 312 that are connected to each other. The cover body 311 is arranged in the accommodating cavity 211 and slides with the mounting part 21. The air inlet chamber 3113 is formed in the cover body 311. The cover body 311 is used to abut against the explosion-proof valve 60 to seal the air inlet chamber 3113. The rod body 312 is passed through the mounting part 21, and the communicating hole 3122 is opened in the rod body 312.

[0036] In practical applications, the shape of the cover body 311 facilitates the formation of the air inlet chamber 3113 , and the shape of the rod body 312 can save space.

[0037] Further, see Figure 5 The base 20 includes a guide ring 22, which is arranged on the mounting portion 21. The axis of the guide ring 22 is parallel to the axis of the accommodating cavity 211. The rod body 312 is passed through the guide ring 22, and the guide ring 22 is opposite to the outer circumference of the rod body 312.

[0038] In practical applications, the guide ring 22 supports the rod body 312 and limits the movement direction of the rod body 312 to the axial direction of the accommodating cavity 211 .

[0039] In this embodiment, the rod body 312 is cylindrical, and the inner sidewall of the guide ring 22 is arc-shaped. In other embodiments of the present application, the rod body 312 can be prismatic, and the inner sidewall of the guide ring 22 is arranged to correspond to the cross section of the rod body 312.

[0040] Optionally, referring to Figure 5 , the air tightness detection tool comprises a driving assembly 40;

[0041] The driving assembly 40 comprises an elastic member 41, the elastic member 41 is assembled in the accommodating cavity 211, one end of the elastic member 41 is connected with the cover body 311, the other end is connected with the mounting portion 21, the elastic member 41 is in a compressed state, and the rod body 312 penetrates the elastic member 41.

[0042] In actual application, before the explosion-proof valve 60 is installed, the cover body 311 and the mounting portion 21 close to one end of the assembly opening 214 abut under the action of the elastic member 41. When the explosion-proof valve 60 is installed, first, the cover body 311 is driven by the rod body 312 to move away from the assembly opening 214 to a position where the assembly opening 214 can be inserted into the explosion-proof valve 60 and the cover body 311 is kept at the position, at this time, the elastic member 41 is further compressed, then the explosion-proof valve 60 is placed in the accommodating cavity 211 at the assembly opening 214, and then the rod body 312 is released, the elastic member 41 restores the deformation and drives the cover body 311 to move towards the assembly opening 214 to abut against the explosion-proof valve 60, so as to seal the air inlet chamber 3113, at this time, the magnetic member 50 magnetically attracts the explosion-proof valve 60 to fix the explosion-proof valve 60.

[0043] Further, referring to Figure 2 and Figure 5 , the driving assembly 40 comprises a handle 42, the handle 42 is provided with a connecting hole 421, a portion of the rod body 312 penetrating out of the mounting portion 21 is formed with a connecting section 3121, and the connecting section 3121 and the connecting hole 421 are matched to limit the rotation of the rod body 312 relative to the handle 42.

[0044] In actual application, when the handle 42 is rotated by an operator, the matching relationship between the connecting section 3121 and the connecting hole 421 can reduce the rotation of the rod body 312 relative to the handle 42.

[0045] In the embodiment, the cross section of the connecting hole 421 and the connecting section 3121 is square. In other embodiments of the application, the cross section of the connecting hole 421 and the connecting section 3121 can also be a polygon such as triangle, pentagon, etc.

[0046] Optionally, referring to Figure 1 and Figure 2 , the base 20 comprises a positioning portion 23, the positioning portion 23 and the mounting portion 21 are connected at the position of the assembly opening 214 and extend towards the assembly opening 214, the positioning portion 23 and the mounting portion 21 surround to form an insertion slot 213, the insertion slot 213 is used for partially inserting the explosion-proof valve 60 into the assembly opening 214 along the axis direction perpendicular to the accommodating cavity 211, and the positioning portion 23 is used for limiting the movement of the explosion-proof valve 60 along the axis direction of the accommodating cavity 211.

[0047] In actual application, the explosion-proof valve 60 is provided with a ring groove, and the explosion-proof valve 60 is inserted into the assembly opening 214 through the insertion groove 213 until the ring groove on the explosion-proof valve 60 cooperates with the positioning part 23, at this time, the axis of the ring groove is parallel to the axis of the accommodating cavity 211, thereby limiting the movement of the explosion-proof valve 60 in the axis direction of the accommodating cavity 211.

[0048] Further, referring to Figure 2 , the positioning part 23 is arranged around the axis of the accommodating cavity 211.

[0049] In actual application, when the explosion-proof valve 60 is inserted into the assembly opening 214, the positioning part 23 is inserted into the ring groove of the explosion-proof valve 60, at this time, the axis of the ring groove is parallel to the axis of the accommodating cavity 211, and the positioning part 23 is arranged around the axis of the accommodating cavity 211, so that the cooperation between the positioning part 23 and the ring groove is more reliable.

[0050] In the embodiment, the positioning part 23 is a continuous half-ring arranged around the axis of the accommodating cavity 211. In other embodiments of the application, the positioning part 23 can also be arranged in multiple, and the multiple positioning parts 23 are arranged around the axis of the accommodating cavity 211 at intervals.

[0051] Optionally, referring to Figure 5 , the inner wall of the accommodating cavity 211 is provided with a sliding groove 212 along the axis direction of the accommodating cavity 211, and the sealing part 31 comprises a sliding block 313, the sliding block 313 is connected with the cover body 311, and the sliding block 313 and the sliding groove 212 are in sliding cooperation.

[0052] In actual application, the cooperation between the sliding groove 212 and the sliding block 313 can improve the stability of the movement of the sealing part 31, and can reduce the rotation of the sealing part 31 inside the accommodating cavity 211.

[0053] Optionally, referring to Figure 3 , Figure 4 and Figure 5 , the sealing part 31 is provided with a nested positioning groove 3111 and a ventilation groove 3112 towards the assembly opening 214, one end of the ventilation groove 3112 is in communication with the air inlet chamber 3113, and the other end is in communication with the communication hole 3122, the depth of the ventilation groove 3112 is greater than the depth of the positioning groove 3111, and the positioning groove 3111 is used for accommodating the magnetic member 50.

[0054] In actual application, the positioning groove 3111, the cover body 311 and the rod body 312 are coaxially arranged, and the magnetic attraction piece 50 is arranged in the positioning groove 3111, so that when the magnetic attraction piece 50 and the explosion-proof valve 60 are magnetically attracted, the cover body 311 and the explosion-proof valve 60 are coaxially arranged, thereby facilitating the abutment of the cover body 311 and the explosion-proof valve 60 to seal the air inlet chamber 3113, and the positioning groove 3111 can facilitate the positioning of the magnetic attraction piece 50. The positioning groove 3111 and the ventilation groove 3112 are nested, which can save space, and the depth of the ventilation groove 3112 is greater than the depth of the positioning groove 3111, so that when the magnetic attraction piece 50 is installed in the positioning groove 3111, a gap capable of ventilation is formed between the magnetic attraction piece 50 and the inner wall of the ventilation groove 3112. When the air tightness is detected, if the air tightness of the battery pack does not meet the standard, the gas enters the air inlet chamber 3113 through the explosion-proof valve 60, and then enters the gap between the inner wall of the ventilation groove 3112 and the magnetic attraction piece 50

[0055] Optionally, referring to Figure 1 and Figure 2 The sealing assembly 30 comprises a sealing ring 32 arranged on one side of the sealing part 31 facing the assembly opening 214, and the sealing ring 32 is used to seal the gap between the sealing part 31 and the explosion-proof valve 60.

[0056] In actual application, the sealing ring 32 can improve the sealing performance of the air inlet chamber 3113, thereby improving the accuracy of detection. In the embodiment, the material of the sealing ring 32 is natural rubber. In other embodiments of the application, the material of the sealing ring 32 can also be nitrile rubber, fluororubber and silicone rubber, etc.

[0057] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0058] It should also be noted that when an element is referred to as being "fixed to" or "arranged on" another element, it can be directly on the other element or can have a centering element therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a centering element.

[0059] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0060] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the present application is included in the patent protection scope of the present application.

Claims

1. An airtightness detection tool, characterized in that: include: A base, the base comprising a mounting portion, wherein the mounting portion has an accommodating cavity and an assembly port communicating with the accommodating cavity; A sealing assembly, the sealing assembly comprising a sealing portion, the sealing portion and the mounting portion slidingly engaged along the axial direction of the accommodating cavity, the sealing portion being disposed through the mounting portion, the sealing portion forming an air intake chamber facing the assembly opening, the sealing portion being configured to abut against the explosion-proof valve to seal the air intake chamber, the sealing portion being provided with a communicating hole, one end of the communicating hole being in communication with the air intake chamber; a connector, the connector being connected to an end of the sealing portion extending out of the mounting portion, the connector being in communication with the communicating hole, and the connector being used for connecting to an external detection device; A magnetic member is provided on the sealing portion and is used for magnetic attraction with the explosion-proof valve to drive the sealing portion to abut against the explosion-proof valve.

2. The airtightness detection tool according to claim 1, characterized in that: The sealing portion includes a cover body and a rod body that are connected to each other. The cover body is arranged in the accommodating cavity and slidingly cooperates with the mounting portion. The air intake chamber is formed on the cover body. The cover body is used to abut against the explosion-proof valve to seal the air intake chamber. The rod body is passed through the mounting portion, and the communicating hole is opened on the rod body.

3. The airtightness detection tool according to claim 2, characterized in that: The base includes a guide ring, the guide ring is arranged on the mounting portion, the rod body is passed through the guide ring, and the guide ring is opposite to the outer peripheral surface of the rod body.

4. The airtightness detection tool according to claim 2, characterized in that: The airtightness detection tooling includes a drive assembly; The driving assembly includes an elastic member, which is assembled in the accommodating cavity. One end of the elastic member is connected to the cover body, and the other end is connected to the mounting portion. The elastic member is in a compressed state, and the rod body passes through the elastic member.

5. The airtightness detection tool according to claim 4, characterized in that: The driving assembly includes a handle, the handle is provided with a connecting hole, the portion of the rod body passing through the mounting portion is formed with a connecting section, and the connecting section cooperates with the connecting hole to limit the rotation of the rod body relative to the handle.

6. The airtightness detection tool according to claim 1, characterized in that: The base includes a positioning portion, the positioning portion and the mounting portion are connected at the position of the assembly port and extend toward the assembly port, the positioning portion and the mounting portion are surrounded by an insertion groove, the insertion groove is used for partially inserting the explosion-proof valve into the assembly port along the axial direction perpendicular to the accommodating cavity, and the positioning portion is used to limit the movement of the explosion-proof valve along the axial direction of the accommodating cavity.

7. The airtightness detection tool according to claim 6, characterized in that: The positioning portion is arranged around the axis of the accommodating cavity.

8. The airtightness detection tool according to any one of claims 2 to 5, characterized in that: The inner wall of the accommodating cavity is provided with a sliding groove along the axial direction of the accommodating cavity. The sealing portion includes a slider, the slider is connected to the cover body, and the slider and the sliding groove are slidably matched.

9. The airtightness detection tool according to any one of claims 1 to 7, characterized in that: The sealing portion is provided with nested positioning grooves and ventilation grooves toward the assembly port, one end of the ventilation groove is connected to the air inlet chamber, and the other end is connected to the connecting hole, the depth of the ventilation groove is greater than the depth of the positioning groove, and the positioning groove is used to accommodate the magnetic attraction component.

10. The airtightness detection tool according to any one of claims 1 to 7, characterized in that: The sealing assembly includes a sealing ring, which is arranged on a side of the sealing portion facing the assembly port, and is used to seal the gap between the sealing portion and the explosion-proof valve.

Images