CN219265629U

CN219265629U - Air tightness detection device

Info

Publication number: CN219265629U
Application number: CN202320559747.5U
Authority: CN
Inventors: 杨云鹏; 李峰; 张道勇
Original assignee: Chongqing Jinkang Power New Energy Co Ltd
Current assignee: Chongqing Jinkang Power New Energy Co Ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-06-27
Anticipated expiration: 2033-03-21

Abstract

The application relates to an air tightness detection device, including the base and set up in test fixture, detection mechanism and the pressing mechanism of base, wherein: the testing jig comprises a jig body, a first air passage and a second air passage, wherein the first air passage and the second air passage are arranged in the jig body, a plurality of groups of connectors are arranged on the jig body, each group of connectors comprises a first connector communicated with the first air passage and a second connector communicated with the second air passage, and the first connector and the second connector are respectively connected with the first opening and the second opening; the pressing mechanism is used for pressing the workpiece on the test fixture so that the first opening and the second opening of the workpiece are respectively tightly matched on the first connector and the second connector; the detection mechanism is used for inflating the first air passage and/or the second air passage and detecting the air pressure in the first air passage and/or the second air passage. The scheme can effectively realize the detection of the air tightness of a plurality of workpieces at one time, greatly improves the detection efficiency, and has simple structure and convenient operation.

Description

Air tightness detection device

Technical Field

The application relates to the technical field of air tightness testing, in particular to an air tightness detection device.

Background

IGBTs are core power components of motor controllers, which generate a great deal of heat loss during operation, and if heat cannot be timely taken away and accumulated in the controller, the operation capability and stability of the IGBTs are reduced, and even burst. The heat emitted by the IGBT mostly needs to be transferred to the external environment, so the performance of the heat sink has an immeasurable effect on the operation performance of the motor controller.

The air tightness of the radiator is an important index for influencing the performance of the radiator, so that the air tightness of the radiator needs to be detected after the radiator is assembled. The existing detection device is usually in a single-mode detection mode, namely, after a single radiator is placed in a positioning tool, air tightness detection is carried out on the single radiator. In the production process, the radiator needs to be continuously replaced for detection, and for mass production of the radiator, the existing detection device is time-consuming and labor-consuming, and has limited detection efficiency.

Disclosure of Invention

The utility model provides an air tightness detection device which is used for detecting air tightness of a workpiece, wherein the workpiece is provided with an inner cavity, and a first opening and a second opening which are communicated with the inner cavity, and the air tightness detection device is characterized by comprising a base, and a test jig, a detection mechanism and a pressing mechanism which are arranged on the base, wherein:

the test fixture comprises a fixture body, a first air passage and a second air passage, wherein the first air passage and the second air passage are arranged in the fixture body, a plurality of groups of connectors are arranged on the fixture body, each group of connectors comprises a first connector communicated with the first air passage and a second connector communicated with the second air passage, and the first connector and the second connector are respectively connected with the first opening and the second opening;

the pressing mechanism is used for pressing the workpiece on the test fixture so that the first opening and the second opening of the workpiece are respectively tightly matched with the first connector and the second connector;

the detection mechanism is used for inflating the first air passage and/or the second air passage and detecting the air pressure in the first air passage and/or the second air passage.

In one embodiment, the jig body includes a first carrier plate and a second carrier plate arranged on the base side by side;

the first air channels are arranged on the first carrier plate, and the plurality of first connectors are distributed along the length direction of the first carrier plate;

the second air passage is formed in the second carrier plate, and a plurality of second connectors are distributed along the length direction of the second carrier plate.

In one embodiment, the upper ends of the first connector and the second connector are respectively provided with a backing ring for contacting with the workpiece.

In one embodiment, the upper ends of the first connector and the second connector are respectively provided with an accommodating groove, the backing ring is arranged in the accommodating grooves, and the upper ends of the backing ring upwards exceed the accommodating grooves.

In one embodiment, a positioning mechanism is disposed on the jig body corresponding to each group of connectors, and the positioning mechanism is used for positioning the workpiece on the jig body, so that the first opening and the second opening of the workpiece are aligned to the first connector and the second connector respectively.

In one embodiment, the positioning mechanism comprises a first positioning column arranged close to the first connector and a second positioning column arranged close to the second connector, and the first positioning column and the second positioning column are matched with the positioning holes in the workpiece.

In one embodiment, the pressing mechanism includes:

the support seat is arranged above the base;

the lifting driving piece is arranged on the supporting seat;

the lifting plate is arranged above the jig body and connected with the execution end of the lifting driving piece;

the pressing piece is arranged on the lower side of the lifting plate and opposite to the first connectors and the second connectors.

In one embodiment, the pressing member includes a plurality of pressing posts, and the plurality of pressing posts are opposite to the first connectors and the second connectors, respectively.

In one embodiment, the pressing mechanism further comprises a guiding structure for guiding the lifting movement of the lifting plate.

In one embodiment, the guide structure comprises a plurality of guide posts arranged between the base and the supporting seat, a plurality of guide sleeves matched with the guide posts are arranged on the lifting plate, and the lifting plate is in sliding fit with the guide posts through the guide sleeves.

The beneficial effects are that: this gas tightness detection device, through set up multiunit connector on the tool body, when making a plurality of work pieces pressfitting on the tool body, a plurality of work pieces can be put through and form a gas circuit cavity that link up through multiunit connector and first air flue and second air flue, based on this, this detection device detects the gas tightness of this gas circuit cavity, is the gas tightness to the inner chamber of every work piece all detected promptly, can effectively realize once only the detection to the gas tightness of a plurality of work pieces, very big promotion detection efficiency to simple structure, the simple operation.

Drawings

FIG. 1 is a schematic diagram showing the structure of an air tightness detecting device in one embodiment;

FIG. 2 is a schematic diagram showing a structure in which a case is provided for the air tightness detecting device in one embodiment;

FIG. 3 is a schematic diagram of the structure of a work piece in one embodiment;

FIG. 4 is a schematic diagram of a test fixture in an airtight testing apparatus according to an embodiment;

FIG. 5 is a cross-sectional view of a first carrier plate in an air tightness detection device according to an embodiment;

FIG. 6 is a cross-sectional view of a second carrier plate in the air tightness detection device in one embodiment;

FIG. 7 is a schematic diagram illustrating a structure of a workpiece pressed on a test fixture according to an embodiment;

fig. 8 is a cross-sectional view of A-A in fig. 7.

Reference numerals in the drawings of the specification include: base 1, riser 11, test fixture 2, first carrier plate 21, second carrier plate 22, first connector 23, second connector 24, first reference column 25, second reference column 26, first air flue 27, second air flue 28, holding tank 29, backing ring 5, pressing mechanism 3, lift driving piece 31, supporting seat 32, lift plate 33, pressing piece 34, guide column 35, uide bushing 36, work piece 4, second opening 41, first opening 42, locating hole 43.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that the illustrations provided in the present embodiment are merely schematic illustrations of the basic idea of the present utility model.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are particularly adapted to the specific details of construction and the use of the utility model, without departing from the spirit or essential characteristics thereof, which fall within the scope of the utility model as defined by the appended claims.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment provides an air tightness detecting device for detecting air tightness of a work 4, the work 4 having an inner cavity and a first opening 42 and a second opening 41 communicating with the inner cavity. For example, referring to fig. 3, in this embodiment, the workpiece 4 may be a radiator in the motor controller, where a cavity of water circulation is provided in the radiator, and two ends of the radiator are respectively provided with a water inlet and a water outlet that are communicated with the cavity, where the cavity of the radiator corresponds to the inner cavity of the workpiece 4, and the water inlet and the water outlet correspond to the first opening 42 and the second opening 41 of the workpiece 4.

The application at least one embodiment provides an air tightness detection device, including base 1 and set up in test fixture 2, detection mechanism and pressing mechanism 3 of base 1, wherein:

the test fixture 2 comprises a fixture body, a first air passage 27 and a second air passage 28 which are arranged in the fixture body, wherein a plurality of groups of connectors are arranged on the fixture body, each group of connectors comprises a first connector 23 communicated with the first air passage 27 and a second connector 24 communicated with the second air passage 28, and the first connector 23 and the second connector 24 are respectively connected with the first opening 42 and the second opening 41;

the detection mechanism is used for inflating the first air passage 27 and/or the second air passage 28 and detecting the air pressure in the first air passage 27 and/or the second air passage 28;

the pressing mechanism 3 is used for pressing the workpiece 4 onto the test fixture 2, so that the first opening 42 and the second opening 41 of the workpiece 4 are tightly fitted onto the first connector 23 and the second connector 24, respectively.

According to the air tightness detection device provided by the embodiment, during detection, a plurality of workpieces 4 are respectively placed on each group of connecting heads, the first openings 42 of the workpieces 4 are aligned with the first connecting heads 23, the second openings 41 are aligned with the second connecting heads 24, then the workpieces 4 are pressed on the test fixture 2 through the pressing mechanism 3, the first openings 42 and the second openings 41 of the workpieces 4 are respectively in close fit with the first connecting heads 23 and the second connecting heads 24, so that the workpieces 4 are communicated with the first air passages 27 through the first connecting heads 23 and the second air passages 28 through the second connecting heads 24, and meanwhile, the first air passages 27 and the second air passages 28 are also communicated with the workpieces 4, so that the inner cavities of the workpieces 4 are communicated with the first air passages 27 and the second air passages 28 to form a parallel air passage, and thus, when the detection mechanism inflates the first air passages 27 and/or the second air passages 28, air can be introduced into the inner cavities of the workpieces 4 through the parallel air passages. When the air pressure in the first air passage 27 and/or the second air passage 28 is detected, the air pressure in the whole parallel air passage is detected, that is, the air tightness of the inner cavity of each workpiece 4 is detected, so that the air tightness of a plurality of workpieces 4 is detected simultaneously. Finally, whether leakage exists in the whole parallel gas paths can be identified according to the gas pressure detection result, so that whether the gas tightness of the plurality of workpieces 4 is qualified is judged.

This application gas tightness detection device that above-mentioned embodiment provided, through set up the multiunit connector on the tool body, when making a plurality of work pieces 4 pressfitting on the tool body, a plurality of work pieces 4 can be put through and form a through gas circuit cavity through multiunit connector and first air flue 27 and second air flue 28, based on this, this detection device detects the gas tightness of this gas circuit cavity, the gas tightness to the inner chamber of every work piece 4 has all detected promptly, can effectively realize once only the detection to the gas tightness of a plurality of work pieces 4, very big promotion detection efficiency, and simple structure, the simple operation. Meanwhile, the device can also detect the air pressure or the air leakage quantity of the air path through the detection mechanism according to the leakage superposition principle of the airtight detection, can preliminarily judge whether a plurality of radiators leak or one radiator leak, and provides a basis for the follow-up retest of the suspicious workpiece 4.

The air tightness detection device provided in the application embodiment is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an air tightness detection device according to at least one embodiment of the present application. As shown in fig. 1, the air tightness detection device comprises a base 1, a test fixture 2 arranged on the base 1, a detection mechanism and a pressing mechanism 3.

The base 1 is mainly used for supporting the test fixture 2, the detection mechanism, the pressing mechanism 3 and the like. As shown in fig. 1, in this embodiment, the base 1 is a flat plate structure, and the bottom of the base is fixedly provided with supporting feet, so that the device can be conveniently placed on a workbench or the ground.

Referring to fig. 2, in this embodiment, the base 1 is further provided with a plurality of vertical plates 11 and a top plate fixed on the vertical plates 11, the base 1, the vertical plates 11 and the top plate enclose a box structure, and at least one vertical plate 11 is provided as a box door capable of being opened and closed so as to facilitate taking and placing of the workpiece 4, so that the test fixture 2, the detection mechanism and the like can be covered by the box structure enclosed by the base 1, the vertical plates 11 and the top plate, thereby ensuring the safety during detection.

The test fixture 2 includes a fixture body, a first air passage 27 and a second air passage 28 disposed in the fixture body, and a plurality of groups of connectors disposed on the fixture body.

Referring to fig. 4, in the present embodiment, the jig body includes a first carrier 21 and a second carrier 22, and the first carrier 21 and the second carrier 22 are disposed on the base 1 side by side. The distance between the first carrier plate 21 and the second carrier plate 22 may be determined according to the distance between the first opening 42 and the second opening 41 on the workpiece 4 to be tested, for example, in this embodiment, the distance between the first carrier plate 21 and the second carrier plate 22 is satisfied, and when the workpiece 4 is placed on the first carrier plate 21 and the second carrier plate 22, the first opening 42 and the second opening 41 of the workpiece 4 just face the first carrier plate 21 and the second carrier plate 22, respectively.

Referring to fig. 5 and 6, in the present embodiment, the first air duct 27 is disposed in the first carrier 21 and extends along the length direction of the first carrier 21, and the second air duct 28 is disposed in the second carrier 22 and extends along the length direction of the second carrier 22. It should be understood that, to ensure tightness of the first air passage 27 and the second air passage 28 during detection, the ports at both ends of the first air passage 27 and the second air passage 28 are blocked by plugs except for the ports connected to the detection mechanism.

Referring to fig. 4 to 6, in the present embodiment, each set of connectors includes a first connector 23 in communication with a first air passage 27 and a second connector 24 in communication with a second air passage 28. For example, referring to fig. 5, the first connector 23 is fixed on the first carrier 21 by an integrally formed manner, and an air hole passing through axially is formed in the first connector 23, and the lower end of the air hole is communicated with the first air channel 27, so that the communication between the first connector 23 and the first air channel 27 can be realized. In the present embodiment, the communication manner between the second connector 24 and the second air passage 28 is the same as the communication manner between the first connector 23 and the first air passage 27, and will not be described herein.

Referring to fig. 4, in the present embodiment, a plurality of first connectors 23 are sequentially arranged on the first carrier plate 21 along the length direction of the first carrier plate 21, a plurality of second connectors 24 are sequentially arranged on the second carrier plate 22 along the length direction of the second carrier plate 22, and the first connectors 23 and the second connectors 24 in each group of connectors are opposite along the width directions of the first carrier plate 21 and the second carrier plate 22. For example, fig. 4 illustrates an embodiment in which four first connectors 23 are provided on the first carrier plate 21, and four second connectors 24 are provided on the second carrier plate 22.

In this embodiment, the upper ends of the first connector 23 and the second connector 24 are both provided with a backing ring 5 for contacting the workpiece 4, and the backing ring 5 is made of a flexible material, such as silica gel, so that by the arrangement of the backing ring 5, the workpiece 4 can be prevented from rigidly contacting the connector, and protection is provided for the workpiece 4, so that the workpiece 4 is prevented from being damaged during detection; moreover, the backing ring 5 is similar to a sealing ring, so that the connector can be in closer contact with the workpiece 4, sealing protection is formed around the opening, air leakage is prevented, and the accuracy of air tightness detection is ensured.

Specifically, referring to fig. 4 and 8, the upper ends of the first connector 23 and the second connector 24 are each provided with a receiving groove 29, the grommet 5 is disposed in the receiving groove 29, and the upper end of the grommet 5 protrudes upward beyond the receiving groove 29. So, not only be convenient for the dismantlement of backing ring 5 and change, accommodation groove 29 has certain restriction effect to the compressive deformation of backing ring 5 in radial direction moreover, avoids backing ring 5 to produce serious deformation after receiving the downforce of work piece 4, has ensured the axial height of backing ring 5 to make it can be better play the isolation guard action between connector and work piece 4.

In this embodiment, a positioning mechanism is disposed on the test fixture 2 corresponding to each set of connectors, and the positioning mechanism is used to position the workpiece 4 on the test fixture 2, so that the workpiece 4 and the test fixture 2 can be accurately positioned by the positioning mechanism, and the first opening 42 and the second opening 41 are ensured to be aligned with the first connector 23 and the second connector 24 respectively, which is beneficial to smooth lamination of the workpiece 4 and the test fixture 2.

It should be understood that in this embodiment, the positioning mechanism may be set according to the structural characteristics of the workpiece 4 to be measured, for example, referring to fig. 3, one end of the workpiece 4 is provided with one positioning hole 43, the other end of the workpiece 4 is provided with two positioning holes 43, and correspondingly, referring to fig. 4, in this embodiment, the positioning mechanism includes a first positioning post 25 disposed near the first connector 23 and a second positioning post 26 disposed near the second connector 24, the number of the second positioning posts 26 is two, and both the first positioning post 25 and the second positioning post 26 are adapted to the positioning holes 43 on the workpiece 4. Based on this positioning mechanism, referring to fig. 7, when the workpiece 4 is positioned on the first positioning post 25 and the second positioning post 26 through the positioning hole 43, the first opening 42 and the second opening 41 are just aligned with the first joint 23 and the second joint 24, respectively, ensuring positioning accuracy.

Referring to fig. 1, in the present embodiment, the pressing mechanism 3 includes a support base 32, a lift driving member 31, a lift plate 33, and a pressing member 34.

Wherein the support base 32 is disposed above the base 1, for example, in some embodiments, the support base 32 may be disposed above the base 1 by a pillar. In this embodiment, referring to fig. 2, the top plate of the case may be directly used as the support base 32 of the pressing mechanism 3.

Referring to fig. 1 and 2, in the present embodiment, the lifting driving member 31 is disposed on the supporting seat 32, for example, the lifting driving member 31 is an air cylinder, the cylinder body of the air cylinder is fixed on the supporting seat 32 by a connecting member such as a screw, and the piston rod of the air cylinder extends downward into the box body.

Referring to fig. 1, in the present embodiment, the lifting plate 33 is disposed above the test fixture 2 and connected to the execution end of the lifting driving member 31, specifically, corresponding to the above-mentioned cylinder, the lifting plate 33 is connected to the execution end of the lifting driving member 31, that is, the lifting plate 33 is fixedly connected to the piston rod of the cylinder, so that the cylinder can drive the lifting plate 33 to lift.

In the present embodiment, in order to improve the movement stability of the lifter plate 33, the pressing mechanism 3 further includes a guide structure for guiding the vertical movement of the lifter plate 33. For example, referring to fig. 1, the guiding structure includes four guiding posts 35 fixedly connected between the supporting base 32 and the base 1, four guiding sleeves 36 are fixedly arranged on the lifting plate 33, and the four guiding sleeves 36 are respectively in sliding fit with the four guiding posts 35.

The pressing member 34 is disposed at the lower side of the lifting plate 33 and opposite to each of the first connection heads 23 and each of the second connection heads 24, for example, in an example, the pressing member 34 may include two pressing plates, which are opposite to the first carrier plate 21 and the second carrier plate 22, respectively, and when the two pressing plates descend along with the lifting plate 33, the workpiece 4 on the first carrier plate 21 and the second carrier plate 22 can be pressed against the first connection heads 23 and the second connection heads 24.

Referring to fig. 1, in the present embodiment, the pressing member 34 includes a plurality of pressing posts, and the plurality of pressing posts are respectively opposite to each of the first connectors 23 and each of the second connectors 24. For example, corresponding to the arrangement of the four first connectors 23 and the four second connectors 24, in this embodiment, the number of the pressing columns is eight, and the pressing columns are respectively opposite to the four first connectors 23 and the four second connectors 24 up and down, so, when the lifting plate 33 descends, each pressing column can perform point-to-point pressing on the portion where the workpiece 4 meets the connectors, and apply positive pressure on the portion where the workpiece 4 meets the connectors, so that the pressing effect is better, and the first opening 42 and the second opening 41 of the workpiece 4 can be ensured to be respectively tightly matched with the first connectors 23 and the second connectors 24.

In the present embodiment, the detecting mechanism is used to inflate the first air passage 27 and/or the second air passage 28 and detect the air pressure in the first air passage 27 and/or the second air passage 28. For example, the detection mechanism may be an existing air tightness tester, which is used to flush compressed air into a test article and obtain the pressure value and pressure change of the air, which is a conventional prior art, and the specific working principle thereof is not described in detail herein. When in use, the air tightness tester is connected with the port (not shown in the figure) of the first air channel 27, the other port of the first air channel 27 and the two ports of the second air channel 28 are closed by plugs, so that the tightness of the parallel air channels communicated with the inner cavities of the workpieces 4 and the first air channel 27 and the second air channel 28 is ensured, and then the air tightness tester is started for detection.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An air tightness detection device for detecting air tightness of a workpiece (4), wherein the workpiece (4) is provided with an inner cavity and a first opening (42) and a second opening (41) which are communicated with the inner cavity, and the air tightness detection device is characterized by comprising a base (1) and a test fixture (2), a detection mechanism and a pressing mechanism (3) which are arranged on the base (1), wherein:

the test jig (2) comprises a jig body, a first air passage (27) and a second air passage (28) which are arranged in the jig body, wherein a plurality of groups of connectors are arranged on the jig body, each group of connectors comprises a first connector (23) communicated with the first air passage (27) and a second connector (24) communicated with the second air passage (28), and the first connector (23) and the second connector (24) are respectively connected with the first opening (42) and the second opening (41);

the pressing mechanism (3) is used for pressing the workpiece (4) on the test fixture (2) so that the first opening (42) and the second opening (41) of the workpiece (4) are respectively tightly matched on the first connector (23) and the second connector (24);

the detection mechanism is used for inflating the first air passage (27) and/or the second air passage (28) and detecting the air pressure in the first air passage (27) and/or the second air passage (28).

2. The air tightness detection device according to claim 1, wherein the jig body comprises a first carrier plate (21) and a second carrier plate (22) arranged side by side on the base (1);

the first air passages (27) are arranged on the first carrier plate (21), and the plurality of first connectors (23) are distributed along the length direction of the first carrier plate (21);

the second air passage (28) is arranged on the second carrier plate (22), and a plurality of second connectors (24) are distributed along the length direction of the second carrier plate (22).

3. The tightness detection device according to claim 1, characterized in that the upper ends of the first connector (23) and the second connector (24) are each provided with a grommet (5) for contact with the work piece (4).

4. A gas tightness detection device according to claim 3, wherein the upper ends of the first connector (23) and the second connector (24) are each provided with a receiving groove (29), the grommet (5) is disposed in the receiving groove (29), and the upper end of the grommet (5) extends upward beyond the receiving groove (29).

5. The air tightness detection device according to claim 1, wherein a positioning mechanism is provided on the jig body corresponding to each set of connectors, and the positioning mechanism is configured to position the workpiece (4) on the jig body such that the first opening (42) and the second opening (41) of the workpiece (4) are aligned with the first connector (23) and the second connector (24), respectively.

6. The tightness detection device according to claim 5, wherein the positioning mechanism comprises a first positioning column (25) arranged close to the first connector (23) and a second positioning column (26) arranged close to the second connector (24), the first positioning column (25) and the second positioning column (26) being adapted to positioning holes (43) on the workpiece (4).

7. The air tightness detection device according to claim 1, wherein the pressing mechanism (3) comprises:

the supporting seat (32) is arranged above the base (1);

a lifting driving member (31) arranged on the supporting seat (32);

the lifting plate (33) is arranged above the jig body and connected with the execution end of the lifting driving piece (31);

and the pressing piece (34) is arranged at the lower side of the lifting plate (33) and is opposite to each first connector (23) and each second connector (24).

8. The air tightness detection device according to claim 7, wherein the pressing member (34) comprises a plurality of pressing posts, and the plurality of pressing posts are respectively opposite to the first connectors (23) and the second connectors (24).

9. The air tightness detection device according to claim 7 or 8, wherein the press-fit mechanism (3) further comprises a guiding structure for guiding the lifting movement of the lifting plate (33).

10. The air tightness detection device according to claim 9, wherein the guiding structure comprises a plurality of guiding posts (35) arranged between the base (1) and the supporting seat (32), a plurality of guiding sleeves (36) matched with the guiding posts (35) are arranged on the lifting plate (33), and the lifting plate (33) is in sliding fit with the guiding posts (35) through the guiding sleeves (36).