Leak detection component and leak detector including the same

Abstract

The present invention discloses a leak detection component and a leak detector including the same. The leak detection component includes: a main body portion provided with an air chamber; a sealing component movably disposed on the main body portion, the sealing component being provided with a sealing head and an air injection channel, one end of the air injection channel communicating with the air chamber, and the other end of the air injection channel penetrating through to the sealing surface of the sealing head and forming an air injection port; a compression portion disposed on the sealing component, when the sealing component moves relative to the main body portion, the compression portion can reduce the volume of the air chamber. The leak detection component and the leak detector including the same with the above structure can omit the inflation gas source and can better increase the air pressure in the container.

Description

Technical Field

[0001] The present invention relates to leak detection technology for containers, in particular to a leak detection component and a leak detector including the same. Background Art

[0002] In the existing leak detector for detecting the airtightness of containers, a leak detection component (or leak detection head) is provided thereon, and a sealing head is provided on the leak detection component. The leak detector drives the leak detection component to move through a driving device, so that the sealing head covers the opening of the container on the detection platform and forms a seal. The leak detection component is provided with an air injection channel, and the air injection channel is connected to an external inflation air source. The air source can inject a predetermined amount of gas into the container through the air injection channel to form a relative high pressure in the container. The leak detection component is also connected with a pressure detection device, and the pressure detection device is used to directly or indirectly detect the pressure change in the container. If the container leaks, the data detected by the pressure detection device will change. Thus, the main control computer of the leak detector can, according to the above detection data, transfer the leaking container to the defect area through some actuators, so as to prevent defective containers from flowing into the next production line.

[0003] Due to the need to provide an external inflation air source, the above-mentioned leak detector has a high equipment cost, a large volume, and is not convenient to use. In this regard, there has also appeared a leak detector that can omit the external inflation air source. The sealing head is made of an elastic material. At the same time, during detection, the driving device drives the leak detection component to move, so that the sealing head seals the opening of the container and part of the sealing head is squeezed into the container, thereby squeezing the air in the container to form a relative high pressure in the container. The pressure change in the container is detected by a pressure detection device, so as to know whether the container has a leak. The above-mentioned leak detection component utilizes the elastic sealing head to squeeze the volume of the container, thereby realizing inflation of the container and playing the role of replacing the air source. However, in actual applications, the degree to which the sealing head is squeezed into the container is limited, and the "inflation" amount is insufficient, which cannot well increase the pressure in the container and may lead to inaccurate detection. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a leak detection component, and a leak detector applying the leak detection component can omit the inflation air source and can well increase the pressure in the container at the same time.

[0005] The present invention also provides a leak detector including the above-mentioned leak detection component.

[0006] The leak detection assembly according to an embodiment of the first aspect of the present invention includes: a main body portion provided with an air chamber; a sealing assembly movably disposed on the main body portion, the sealing assembly being provided with a sealing head and an air injection channel, one end of the air injection channel communicating with the air chamber, and the other end of the air injection channel penetrating to the sealing surface of the sealing head and forming an air injection port; a compression portion disposed on the sealing assembly, when the sealing assembly moves relative to the main body portion, the compression portion can reduce the volume of the air chamber.

[0007] The leak detection assembly according to an embodiment of the first aspect of the present invention has at least the following beneficial effects: In the above leak detection assembly, by using the movement of the sealing assembly, the compression portion can compress the volume of the air chamber, and gas is injected into the container through the air injection channel and the air injection port to make the container form a relatively high pressure. In the above structure, the inflation of the container is achieved by additionally provided air chamber and compression portion, and the structure is more reasonable and practical. The inflation amount can be ensured by reasonably configuring the size of the air chamber and the movement amplitude of the sealing assembly, so as to better increase the air pressure of the container.

[0008] According to some embodiments of the present invention, the main body portion includes a support portion and an airbag member, one end of the airbag member is fixed to the compression portion, the other end of the airbag member is fixed to the support portion, the air chamber is configured as the inner cavity of the airbag member, and when the sealing assembly moves, the compression portion can reduce the volume of the airbag member.

[0009] According to some embodiments of the present invention, the main body portion is provided with a piston chamber, the compression portion is configured as a piston, the piston is movably disposed in the piston chamber, and the air chamber is enclosed by the piston and the wall of the piston chamber.

[0010] According to some embodiments of the present invention, it further includes a air pressure detection device; a detection hole is opened on the wall of the air chamber, and the air pressure detection device detects the air pressure in the air chamber through the detection hole.

[0011] According to some embodiments of the present invention, the air pressure detection device is configured as a pressure sensor, the pressure sensor is connected to the main body portion, the pressure sensor is provided with a detection end, and the detection end closes the detection hole.

[0012] According to some embodiments of the present invention, it further includes an elastic member, the elastic member is disposed between the sealing assembly and the main body portion, and the elastic member is configured to: when the compression portion reduces the volume of the air chamber, apply a restoring force to the sealing assembly.

[0013] According to some embodiments of the present invention, the sealing assembly is linearly movably connected to the main body portion.

[0014] According to some embodiments of the present invention, the sealing assembly includes a connecting rod body, the sealing head and the compression part are arranged at two ends of the connecting rod body, and the connecting rod body is connected to the main body part in a linearly movable manner.

[0015] According to some embodiments of the present invention, a first communication hole communicating with the air chamber is arranged on the end face of one end of the airbag member, a first annular flange portion is arranged at one end of the airbag member, the first annular flange portion is arranged around the hole axis of the first communication hole, one end of the air injection channel is provided with a communication port, the communication port is opposite to and communicates with the first communication hole, the compression part is provided with a first annular clamping position, the first annular clamping position clamps and fastens the first annular flange portion, and the first annular flange portion abuts against the surrounding position of the communication port; a detection hole communicating with the air chamber is arranged on the end face of the other end of the airbag member, a second annular flange portion is arranged at the other end of the airbag member, the second annular flange portion is arranged around the detection hole, the support portion is provided with a second communication hole, the second communication hole is opposite to and communicates with the detection hole, the support portion is provided with a second annular clamping position, the second annular clamping position clamps and fastens the second annular flange portion, and the second annular flange portion abuts against the periphery of the hole opening of the second communication hole.

[0016] The leak detector according to the second aspect embodiment of the present invention includes: a frame; the leak detection assembly according to any one of the above, arranged on the frame; a driving device, arranged on the frame, for driving the leak detection assembly to move.

[0017] The leak detector according to the second aspect embodiment of the present invention has at least the following beneficial effects: due to the adoption of the above leak detection assembly, the leak detector can better increase the air pressure in the container.

[0018] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 Is a three-dimensional schematic diagram of the leak detection assembly (adopting the airbag scheme) according to the embodiment of the present invention;

[0021] Figure 2 Is Figure 1 An exploded schematic diagram of the structure shown;

[0022] Figure 3 Is Figure 1 A half-sectional schematic diagram of the structure shown;

[0023] Figure 4 Schematic three-dimensional view of the leak detection component (adopting a piston solution) according to an embodiment of the present invention;

[0024] Figure 5 is Figure 4 exploded view of the structure shown;

[0025] Figure 6 is Figure 4 semi-sectional view of the structure shown;

[0026] Figure 7 is Figure 3 enlarged view at position A of

[0027] Reference numerals:

[0028] Main body part 100, air chamber 101, detection hole 102, first communication hole 103, second communication hole 104, support part 110, main housing 111, end cover part 112, airbag part 120, first annular flange part 121, second annular flange part 122, external connection seat 130;

[0029] Sealing component 200, gas injection channel 201, gas injection port 202, communication port 203, sealing head 210, seat body part 211, sealing part 212, sealing head body 2121, limiting part 2122, connecting part 213, connecting rod body 220;

[0030] Compression part 300, upper seat body 310, lower seat body 320;

[0031] Air pressure detection device 400, detection end 410;

[0032] Elastic member 500. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, "a number of" means one or more, "a plurality of" means more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, while understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0037] Refer to Figures 1 to 3 A leak detection assembly as shown in includes: a main body part 100, a sealing assembly 200, and a compression part 300. The main body part 100 includes a support part 110 and an airbag part 120, and the inner cavity of the airbag part 120 is configured as an air chamber 101. The sealing assembly 200 is movably arranged on the main body part 100, and the compression part 300 is arranged on the sealing assembly 200. One end of the airbag part 120 is fixed to the compression part 300, and the other end of the airbag part 120 is fixed to the support part 110. The sealing assembly 200 is provided with a sealing head 210 and an air injection channel 201. One end of the air injection channel 201 is communicated with the air chamber 101, and the other end of the air injection channel 201 penetrates to the sealing surface of the sealing head 210 and forms an air injection port 202. When the sealing assembly 200 moves, the compression part 300 can reduce the volume of the airbag part 120. It should be understood that the sealing surface of the sealing head 210 refers to the surface used to contact the peripheral edge of the container opening and seal it.

[0038] When the above-mentioned leak detection assembly works, the sealing head 210 first abuts against the peripheral edge of the opening of the container to be leak-detected, uses the sealing surface of the sealing head 210 to seal the container opening, and then makes the sealing assembly 200 move relative to the main body part 100, so that the compression part 300 compresses the volume of the airbag part 120, the volume of the air chamber 101 decreases, and air is injected into the container through the air injection channel 201 and the air injection port 202 to realize inflation of the container, and makes the entire cavity space of the inner cavity of the container, the air injection channel 201, and the air chamber 101 enter a relatively high pressure (relative to the atmospheric pressure) state.

[0039] Refer to Figures 4 to 6, is a leak detection component of another structure. In this embodiment, the leak detection component includes: a main body part 100, a sealing component 200, and a compression part 300. The sealing component 200 is movably arranged on the main body part 100, the compression part 300 is arranged on the sealing component 200, the main body part 100 is provided with a piston cavity, the compression part 300 is configured as a piston, and the piston is movably arranged in the piston cavity. An air chamber 101 is enclosed by the piston and the wall of the piston cavity. The sealing component 200 is provided with a sealing head 210 and an air injection channel 201. One end of the air injection channel 201 is communicated with the air chamber 101. Specifically, a communication through hole can be opened on the piston to communicate the air injection channel 201 and the air chamber 101. The other end of the air injection channel 201 penetrates to the sealing surface of the sealing head 210 and forms an air injection port 202.

[0040] When the above-mentioned leak detection component works, the sealing head 210 first abuts against the peripheral edge of the opening of the container to be leak-detected, and seals the container opening by using the sealing surface of the sealing head 210. Then, the sealing component 200 is moved relative to the main body part 100, so that the piston serving as the compression part 300 moves in the piston cavity and compresses the volume of the air chamber 101. The gas also injects into the container through the air injection channel 201 and the air injection port 202, thereby realizing the inflation of the container and forming a relative high pressure.

[0041] For the above-mentioned leak detection component, by the movement of the sealing component 200, the compression part 300 can compress the volume of the air chamber 101, and the gas injects into the container through the air injection channel 201 and the air injection port 202 to make the container form a relative high pressure. In the above structure, the inflation of the container is realized by additionally provided air chamber 101 and compression part 300, and the structure is more reasonable and practical. The inflation volume can be ensured by reasonably configuring the size of the air chamber 101 and the movement amplitude of the sealing component 200, so as to better increase the air pressure of the container.

[0042] In the above embodiment, mainly the setting of the airbag part 120 or the piston is adopted to realize the compression of the volume of the air chamber 101. For the scheme adopting the airbag part 120, the structure is relatively durable and not easy to leak after long-term use. For the scheme adopting the piston, the structure is relatively simple and the assembly is simple. In other embodiments, other suitable structures can also be adopted, as long as the volume of the air chamber 101 can be reduced when the sealing component 200 moves, then the gas with the reduced volume of the air chamber 101 can be filled into the container through the air injection channel 201 and the air injection port 202.

[0043] In the above embodiments, the main body portion 100 can be used as a portion for external connection. To facilitate the external connection of the main body portion 100, in the above embodiments, an external connection seat 130 for external connection is provided on the main body portion 100, and the external connection seat 130 is provided with a connection structure. The connection structure is specifically a mounting hole through which a threaded fastener can pass, facilitating installation onto an external member.

[0044] In the above embodiments, the leak detection assembly further includes a pressure detection device 400; a detection hole 102 is formed in the cavity wall of the air chamber 101, and the pressure detection device 400 detects the air pressure in the air chamber 101 through the detection hole 102. Since the air chamber 101 is connected to the container through the air injection channel 201 and the air injection port 202 when the leak detection assembly is working, the air pressure of the container can be known by detecting the air pressure in the air chamber 101. The detection hole 102 is formed in the cavity wall of the air chamber 101, so that it is possible to avoid providing a detection hole on the sealing assembly 200, which is beneficial to simplifying the structure of the sealing assembly 200. Especially for the leak detection assembly applied to small containers, the sealing head 210 of the sealing assembly 200 is small, and there may not be enough space to provide the detection hole 102. It should be understood that there are at least two cases where the pressure detection device 400 detects the air pressure in the air chamber 101 through the detection hole 102: one is that the detection end of the pressure detection device 400 indirectly detects the air pressure in the air chamber 101 by directly detecting the air pressure in the detection hole 102; the other is that after the detection end of the pressure detection device 400 is installed in the detection hole 102, it forms a connection with the air chamber 101 or can contact the internal air to realize the detection of the air pressure in the air chamber 101.

[0045] In the above embodiments, specifically, the pressure detection device 400 is configured as a pressure sensor, the pressure sensor is connected to the main body portion 100, and the pressure sensor is provided with a detection end 410, and the detection end 410 closes the detection hole 102. With the above structure, the air pressure detection part can be implemented without using a connecting air pipe, and the structure is simple and easy to implement. In some other embodiments, the pressure detection device 400 can also adopt other sensors or devices that can directly or indirectly detect air pressure changes, and those skilled in the art can select according to the actual situation.

[0046] In the above embodiments, the leak detection assembly further includes an elastic member 500, the elastic member 500 is disposed between the sealing assembly 200 and the main body portion 100, and the elastic member 500 is configured to: when the compression portion 300 reduces the volume of the air chamber 101, apply a restoring force to the sealing assembly 200. By providing the above elastic member 500, the sealing assembly 200 has elastic damping when moving, and the movement is smoother; in addition, after the detection is completed, the elastic member 500 can also help the sealing assembly 200 to reset, drive the airbag member 120 to restore its volume or the piston to reset, so as to quickly return to the initial state before the detection to perform the detection of the next container.

[0047] In the above embodiments, the sealing assembly 200 is linearly movably connected to the main body portion 100. The sealing assembly 200 compresses the volume of the air chamber 101 in a linear movement manner. The movement mode is simple, which can simplify the structure of the supporting driving device and is also easy to control the inflation amount. Of course, in some other embodiments, the sealing assembly 200 can also adopt other movement modes, such as rotary, as long as the compression of the volume of the air chamber 101 by the compression portion 300 can be achieved. In the above embodiments, the elastic member 500 is specifically a spring. Of course, in some other embodiments, the elastic member 500 can also be configured with other elastic components according to specific situations, such as torsion springs, etc.

[0048] In the above embodiments, the sealing assembly 200 includes a connecting rod body 220. The sealing head 210 and the compression portion 300 are arranged at both ends of the connecting rod body 220. The connecting rod body 220 is linearly movably connected to the main body portion 100. The above structure is simple, easy to implement, and the action is stable and smooth. Specifically, a linear sliding sleeve is provided on the main body portion 100. The connecting rod body 220 is a cylindrical rod and is slidably connected to the inner hole of the linear sliding sleeve. Of course, it can be imagined that other movable connection structures can also be adopted, such as the cooperation of a chute portion and a matching slider portion, and the chute portion and the slider portion are correspondingly arranged on the main body portion 100 and the connecting rod body 220 to realize the relative linear movable connection between the connecting rod body 220 and the main body portion 100.

[0049] In the solution adopting the airbag member 120, a first communication hole 103 communicating with the air chamber 101 is provided on the end face of one end of the airbag member 120. A first annular flange portion 121 is provided at one end of the airbag member 120. The first annular flange portion 121 is arranged around the hole axis of the first communication hole 103. One end of the air injection channel 201 is provided with a communication port 203. The communication port 203 is opposite to and communicates with the first communication hole 103. The compression portion 300 is provided with a first annular clamping position, and the first annular clamping position tightly clamps the first annular flange portion 121. The first annular flange portion 121 abuts against the surrounding position of the communication port 203. With the above structure, the airtightness of the communication between the air chamber 101 and the air injection channel 201 is relatively good. Specifically, the compression portion 300 is formed by connecting an upper seat body 310 and a lower seat body 320, and the first annular clamping position is formed by enclosing the upper seat body 310 and the lower seat body 320. Specifically, the upper seat body 310 and the lower seat body 320 are connected by threads.

[0050] In the solution adopting the airbag member 120, a detection hole 102 communicating with the air chamber 101 is provided on the end face at the other end of the airbag member 120. A second annular flange portion 122 is provided at the other end of the airbag member 120. The second annular flange portion 122 is disposed around the detection hole 102. The support portion 110 is provided with a second communication hole 104. The second communication hole 104 is opposite to and communicates with the detection hole 102. The support portion 110 is provided with a second annular clamping position. The second annular clamping position clamps and fastens the second annular flange portion 122. The second annular flange portion 122 abuts against the periphery of the orifice of the second communication hole 104. With the above structure, the airtightness of the connection between the air chamber 101 and the second communication hole 104 is relatively good. The second communication hole 104 can be used to install a pressure detection device 400 or to connect an air pipe, and the air pipe is connected to another pressure detection device 400. Specifically, the support portion 110 is formed by connecting a main housing 111 and an end cover portion 112. The second annular clamping position is formed by enclosing the main housing 111 and the end cover portion 112. The main housing 111 and the end cover portion 112 are specifically connected by threads. In this embodiment, the support portion 110 is provided with an airbag accommodation cavity, and the airbag accommodation cavity is specifically formed by enclosing the main housing 111 and the end cover portion 112. The airbag member 120 is located in the airbag accommodation cavity, so that the protection of the airbag member 120 is relatively good.

[0051] Referring Figure 7 , in the above embodiment, the sealing head 210 includes a seat body portion 211, a sealing portion 212, and a connecting portion 213. The plugging surface of the sealing head 210 is disposed on the sealing portion 212. The sealing portion 212 and the seat body portion 211 are arranged side by side at intervals. The connecting portion 213 has elasticity. The sealing portion 212 is connected to the seat body portion 211 through the connecting portion 213. The connecting portion 213 can be bent and deformed so that the sealing portion 212 can adjust its relative position relative to the seat body portion 211. Since the sealing portion 212 is connected to the seat body portion 211 through the bendable and deformable connecting portion 213, when the peripheral edge of the opening of the container is inclined, the sealing portion 212 can also be inclined relative to the seat body portion 211, so as to adapt to the opening of the container, and the effect of sealing the opening is relatively good.

[0052] In the above embodiment, the sealing portion 212 includes a head body 2121. The plugging surface of the sealing head 210 is specifically configured as the end face of the head body 2121. The head body 2121 and the connecting portion 213 are integrally formed elastic bodies. With the above structure, the structure of the entire sealing head 210 can be greatly simplified, and the cost can be reduced. Of course, it can be imagined that in some other embodiments, the head body 2121 can also be formed separately from the connecting portion 213.

[0053] In the above embodiments, the connecting portion 213 includes a cylindrical portion. One end of the cylindrical portion is connected to the central position of the sealing portion 212, and the other end is connected to the central position of the seat body portion 211. Thus, the sealing portion 212 can adjust its relative position in the front, rear, left, and right circumferential position directions relative to the seat body portion 211, so as to better adapt to openings in different inclination situations.

[0054] In the above embodiments, the sealing portion 212 is provided with a limiting portion 2122. The limiting portion 2122 is disposed opposite to the seat body portion 211 and there is a predetermined distance between the limiting portion 2122 and the seat body portion 211. When the limiting portion 2122 abuts against the seat body portion 211, it will limit the further bending deformation of the connecting portion 213, thereby restricting the maximum adjustment range of the sealing portion 212 and protecting the sealing head 210. Specifically, the limiting portion 2122 and the sealing head body 2121 are specifically separately provided and connected to each other. Of course, in some embodiments, the two can also be integrally provided. Further, the portions of the limiting portion 2122 and the seat body portion 211 that are opposite to each other are rigid bodies, so that the limiting is more accurate and stable.

[0055] In the above embodiments, the gas injection channel 201 is divided into an upper channel and a lower channel. The lower channel is provided in the sealing head 210 and penetrates the entire sealing head 210, while the upper channel is provided in the connecting rod body 220.

[0056] A leak detector includes: a frame, the above-described leak detection assembly, and a driving device. The leak detection assembly is disposed on the frame, and the driving device is disposed on the frame for driving the leak detection assembly to move. Due to the adoption of the above-described leak detection assembly, the leak detector can better increase the air pressure in the container. Specifically, the driving device can be some multi-axis moving platforms. The leak detection assembly is arranged on the frame through the multi-axis moving platform, and the multi-axis moving platform drives the leak detection assembly to move relative to the frame to achieve the sealing and inflation of the container opening. Of course, it can be imagined that the driving device can also adopt some manual driving mechanisms to manually drive the leak detection assembly to act.

[0057] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0058] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A leak detection component, characterized in that, it includes: a main body part (100) provided with an air chamber (101); a sealing component (200) movably arranged on the main body part (100), the sealing component (200) is provided with a sealing head (210) and an air injection channel (201), one end of the air injection channel (201) is communicated with the air chamber (101), the other end of the air injection channel (201) penetrates to the sealing surface of the sealing head (210) and forms an air injection port (202), the sealing head (210) is used to abut against the peripheral edge of the opening of the container to be leak-detected, and the sealing surface of the sealing head (210) is used to seal the opening of the container; a compression part (300) arranged on the sealing component (200), when the sealing component (200) moves relative to the main body part (100), the compression part (300) can make the volume of the air chamber (101) smaller, and gas can be injected into the container through the air injection channel (201) and the air injection port (202); a pressure detection device (400), a detection hole (102) is opened on the chamber wall of the air chamber (101), and the pressure detection device (400) detects the air pressure in the air chamber (101) through the detection hole (102); The main body part (100) includes a support part (110) and an airbag part (120). One end of the airbag part (120) is fixed to the compression part (300), and the other end of the airbag part (120) is fixed to the support part (110). The air chamber (101) is configured as the inner cavity of the airbag part (120). When the sealing assembly (200) moves, the compression part (300) can reduce the volume of the airbag part (120); a first communication hole (103) communicating with the air chamber (101) is provided on the end face of the one end of the airbag part (120). A first annular flange part (121) is provided at the one end of the airbag part (120). The first annular flange part (121) is arranged around the axis of the first communication hole (103). One end of the air injection channel (201) is configured with a communication port (203). The communication port (203) is opposite to and communicates with the first communication hole (103). The compression part (300) is provided with a first annular clamping position, and the first annular clamping position tightly clamps the first annular flange part (121). The first annular flange part (121) abuts against the surrounding position of the communication port (203); a detection hole (102) communicating with the air chamber (101) is provided on the end face of the other end of the airbag part (120). A second annular flange part (122) is provided at the other end of the airbag part (120). The second annular flange part (122) is arranged around the detection hole (102). The support part (110) is provided with a second communication hole (104). The second communication hole (104) is opposite to and communicates with the detection hole (102). The support part (110) is provided with a second annular clamping position, and the second annular clamping position tightly clamps the second annular flange part (122). The second annular flange part (122) abuts against the periphery of the orifice of the second communication hole (104).

2. The leak detection assembly according to claim 1, wherein, the air pressure detection device (400) is configured as a pressure sensor. The pressure sensor is connected to the main body part (100). The pressure sensor is provided with a detection end (410), and the detection end (410) closes the detection hole (102).

3. The leak detection assembly according to claim 1, wherein, it further includes an elastic member (500). The elastic member (500) is arranged between the sealing assembly (200) and the main body part (100). The elastic member (500) is configured to: when the compression part (300) reduces the volume of the air chamber (101), apply a restoring force to the sealing assembly (200).

4. The leak detection assembly according to claim 1, wherein, the sealing assembly (200) is connected to the main body part (100) in a linearly movable manner.

5. The leak detection assembly according to claim 4, wherein, The sealing assembly (200) includes a connecting rod body (220), and the sealing head (210) and the compression part (300) are arranged at two ends of the connecting rod body (220), and the connecting rod body (220) is connected to the main body part (100) in a linearly movable manner.

6. A leak detector, characterized in that, it includes: a frame; the leak detection assembly according to any one of claims 1 to 5, arranged on the frame; a driving device, arranged on the frame, for driving the leak detection assembly to move.

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