Airtightness detection assembly

Abstract

The utility model innovatively provides an airtightness detection assembly, comprising a connector and a driving member, the connector is used for connecting a member to be detected, the driving member comprises a driving end, an air channel is arranged in the driving end, one end of the driving end is movably connected with the connector through a ball head, the other end of the driving end is connected with an external air source, and the driving end is connected with the external air source. The connector is communicated with an external air source through the air passage; the utility model has the advantages that the connector can rotate relative to the driving end on the basis of ensuring normal conveying of gas, so that the connector can be suitable for connection at certain specific positions, and the connection tightness of the connector and the to-be-detected piece is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of detection structures, and more specifically to an airtightness detection component. Background Technology

[0002] In the process of airtightness testing of pipelines, valve bodies, tooling parts, etc., sealing tooling is used to seal the pipeline, valve body or tooling parts, and then the inside is tested. An air inlet channel is set on the plug, the plug is sealed to the pipeline, and air is injected into the part to be tested through the air inlet channel to test the airtightness inside the part.

[0003] Currently, there are two main methods for testing the airtightness of test pieces: one is manual connection, and the other is to install the test piece in a fixed position and drive it into the test piece. Manual connection has problems such as high cost and low efficiency, while driven connection has environmental limitations. This type of driven connection is mainly suitable when the test piece and the test piece are directly aligned or when there is a large space between them to facilitate the adjustment of the test piece's position. Therefore, its application range is narrow and it is not suitable for testing certain test positions. In addition, the current driving methods are all cylinder-driven, with the cylinder's driving part acting directly on the outside of the test piece, which increases the size of the test piece and the cost. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an airtightness detection component to overcome the above-mentioned defects in the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An airtightness testing component includes a connector and a drive unit. The connector is used to connect to the part to be tested. The drive unit includes a drive end with an air passage inside. One end of the drive end is movably connected to the connector via a ball joint, and the other end of the drive end is connected to an external air source. The air passage connects the connector to the external air source.

[0007] Furthermore, the drive unit also includes a cylinder, a portion of which is located within the cylinder. The cylinder is provided with a force that acts on the drive end, causing the drive end to move within the cylinder and move the connector closer to or away from the workpiece to be inspected.

[0008] Furthermore, an air chamber is provided between the drive end and the cylinder body, and a piston ring located in the air chamber is provided on the outer surface of the drive end. Air heads connected to the air chamber are respectively provided at both ends of the air chamber in the direction of movement of the drive end.

[0009] Furthermore, the piston ring has stepped portions at both ends in the direction of movement at the drive end.

[0010] Furthermore, the cylinder body has an air inlet at the end away from the connector, and the orientation of the air inlet is perpendicular to the direction of movement of the drive end.

[0011] Furthermore, the cylinder body is also provided with a detection port, which faces the air inlet.

[0012] Furthermore, the cylinder block is also provided with an exhaust passage, which is located on the side of the air chamber away from the connector.

[0013] Furthermore, the end of the connector away from the drive end is provided with a mounting groove, and a sealing ring is provided in the mounting groove. The connector is also provided with a pressing member, which is used to press the sealing ring so that the sealing ring is tightly attached to the workpiece to be inspected.

[0014] Furthermore, the connector is inserted into the workpiece to be inspected, and the sealing ring is fitted onto the outer surface of the drive end.

[0015] Furthermore, the connector is fitted onto the part to be tested, and the sealing ring is located on the inner surface of the drive end.

[0016] The beneficial effects of this utility model are as follows: the drive end and the connector are connected by a ball joint, and the air passage in the drive end connects the connector to an external air source. While ensuring normal air delivery, the connector can rotate relative to the drive end, so that it can be used for connection in certain specific positions, and the connection tightness between the connector and the workpiece under inspection is improved. Attached Figure Description

[0017] Figure 1 This is an overall sectional view of the present invention;

[0018] Figure 2 This is an overall structural diagram of the present invention;

[0019] Figure 3 This is a cross-sectional view of the cylinder body and drive end in this utility model;

[0020] Figure 4 This is a schematic diagram of embodiment 4 of this utility model;

[0021] Figure 5 This is a schematic diagram of Embodiment 5 of this utility model.

[0022] Reference numerals: 1. Connector; 2. Drive component; 21. Drive end; 211. Piston ring; 2111. Stepped portion; 22. Cylinder block; 3. Air passage; 4. Ball head; 5. Air chamber; 6. Air head; 7. Air inlet; 8. Detection port; 9. Exhaust passage; 10. Sealing ring; 11. Extrusion component. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0027] Current drive-type connections are mainly suitable when the workpiece under test and the test piece are directly aligned, or when there is ample space between them for easy adjustment of the test piece's position. Therefore, their application range is narrow and they are not suitable for testing certain positions. Furthermore, current drive methods are all cylinder-driven, relying on the cylinder's drive unit to directly act on the outside of the test piece, increasing the size and cost of the test piece. Therefore, this utility model designs an airtightness testing component, such as... Figure 1 and Figure 2As shown, it includes a connector 1 and a drive component 2. The connector 1 is used to connect the part to be inspected, which is usually a pipe fitting of a certain product. The connector 1 is connected to the pipe fitting. The drive component 2 includes a drive end 21, which has an air passage 3. One end of the drive end 21 is movably connected to the connector 1 through a ball head 4, and the other end of the drive end 21 is connected to an external air source. The air passage 3 connects the connector 1 to the external air source. While ensuring normal air delivery, it allows the connector 1 to rotate relative to the drive end 21, so that it can be used for connection in certain specific positions, and improves the tightness of the connection between the connector 1 and the part to be inspected.

[0028] Specifically, such as Figure 3 As shown, the drive unit 2 also includes a cylinder 22. A part of the drive end 21 is located inside the cylinder 22, and another part is exposed outside the cylinder 22. The head end of this part is connected to a ball head 4, which is also penetrated by the air passage 3 of the drive end 21. The cylinder 22 is provided with a force that acts on the drive end 21, so that the drive end 21 moves inside the cylinder 22 and drives the connector 1 to move closer to or away from the workpiece to be inspected. Compared with the traditional external cylinder drive, this utility model combines drive and air supply, which can realize the drive connection of the connector 1 and realize air tightness detection, and also reduce the overall volume.

[0029] Implementation 1:

[0030] like Figure 3 As shown, based on the movement mode of the drive end 21, an air chamber 5 is provided between the drive end 21 and the cylinder 22. Specifically, at least part of the diameter of the drive end 21 is smaller than the diameter of the inner cavity of the cylinder 22. Therefore, the air chamber 5 is formed by the outer wall of the drive end 21 and the inner wall sealing plate of the cylinder 22. The outer surface of the drive end 21 is provided with a piston ring 211 located in the air chamber 5. At both ends of the air chamber 5 in the movement direction of the drive end 21, there are air heads 6 connected to the air chamber 5. The air head 6 closer to the connector 1 is defined as the first air head 6. The other air head 6 is the second air head 6. In the initial state, the part of the drive end 21 located inside the cylinder 22 is completely inside the cylinder 22. At this time, the piston ring 211 is located at the end of the air chamber 5 away from the connector 1. When it is necessary to extend the drive end 21 outward, the second air head 6 connects to the external high-pressure air and injects it into the air chamber 5. The first air head 6 depressurizes, and the high-pressure air can push the piston ring 211 to make the drive end 21 extend outward. Conversely, when the drive end 21 is reset, the first air head 6 injects air into the air chamber 5, and the second air head 6 depressurizes.

[0031] In addition, in order to facilitate the injection of air into the air chamber 5 by the first air head 6 or the second air head 6 so as to push the piston ring 211, both ends of the piston ring 211 in the direction of movement of the drive end 21 are provided with stepped portions 2111. When the piston ring 211 moves to be close to the inner wall of the air chamber 5, under the action of the stepped portions 2111, there is a small cavity between the piston ring 211 and the inner wall of the air chamber 5, which is used for the gas introduced by the air head 6 to enter, so as to ensure that the piston ring 211 is pushed smoothly.

[0032] Example 2:

[0033] Another way of moving the drive end 21 is that, since the drive end 21 has a wall thickness, a power source is provided at the end of the drive end 21 away from the connector 1. The power source outputs a horizontal force to push the drive end 21 out of the cylinder 22 or pull it back into the cylinder 22. This driving method requires the setting of another power source and a pusher. The power source is connected to the side wall of the drive end 21 through the pusher.

[0034] Example 3:

[0035] Based on Embodiment 1, the cylinder body 22 has an air inlet 7 at the end furthest from the connector 1. If the orientation of the air inlet 7 is the same as the direction of movement of the drive end 21, the air input through the air inlet 7 will easily act on the cross-section of the drive end 21, causing the drive end 21 to move under pressure. Therefore, the orientation of the air inlet 7 is perpendicular to the direction of movement of the drive end 21. That is, if the direction of movement of the drive end 21 is horizontal, then the orientation of the air inlet 7 is vertical. Figure 1 As shown, the air inlet 7 is located on the lower surface of the cylinder 22. Furthermore, in the initial state, the air inlet 7 can be blocked by the end of the drive end 21 away from the connector 1. Before supplying air to the air inlet 7, the drive end 21 needs to be pushed out of the cylinder 22. Only then can the air inlet 7 be opened for normal air supply.

[0036] In addition, the cylinder body 22 is also provided with a detection port 8, which faces the air inlet 7. A flow meter or a pressure meter can be installed on the detection port 8. By detecting the data of the air entering the cylinder body 22 through the air inlet 7, it can be determined whether the external pipe (hose) connected to the air inlet 7 is twisted, which would cause the air flow and pressure entering the cylinder body 22 to fail to meet the specified requirements.

[0037] In addition, since the drive end 21 can slide inside the cylinder 22, and both sides of the air chamber 5 are sealed with the sealing ring 10 to prevent air leakage in the air chamber 5, if there is air leakage in the air chamber 5, or if the sealing ring 10 at the end of the air chamber 5 near the air inlet 7 is damaged, the air in the air chamber 5 is likely to leak to the air inlet 7, which will affect the air tightness test. Therefore, an exhaust channel 9 is also provided on the cylinder 22. The exhaust channel 9 is located on the side of the air chamber 5 away from the connector 1. When the air in the air chamber 5 leaks, the air flows out from the exhaust channel 9 first.

[0038] The connector 1 has a mounting groove at the end away from the drive end 21, and a sealing ring 10 is provided in the mounting groove. The connector 1 also has a pressing member 11, which is used to press the sealing ring 10 so that the sealing ring 10 is tightly attached to the workpiece to be inspected. Current pressing methods include direct air pressure or hardware pressing. This invention uses hardware pressing. The pressing member 11 includes a pressing sleeve, which is slidably fitted onto the connector 1. One side wall of the mounting groove is formed by the pressing sleeve; that is, even when not initially pressed, the pressing sleeve is also in contact with the sealing ring 10 in the mounting groove. It also includes a drive source, which can include cylinders, electric cylinders, motors and other types of propulsion methods. This utility model prefers a cylinder method. An air passage is opened in the connector 1. By passing air into the air passage, the extrusion sleeve slides on the connector 1 and extrudes the sealing ring 10. The sealing ring 10 can deform and expand outward from the mounting groove, closely adhering to the workpiece (pipe). When the extrusion sleeve extrudes the sealing ring 10 and slides, a gradually increasing air pressure chamber is formed between the extrusion sleeve and the connector 1, which facilitates the extrusion sleeve to complete the extrusion of the sealing ring 10.

[0039] Example 4:

[0040] Based on the above embodiments, such as Figure 4 As shown, connector 1 is inserted into the workpiece to be inspected, and sealing ring 10 is sleeved on the outer surface of drive end 21. That is, this connection method is internal expansion type. By inserting into the pipe, the compression sleeve squeezes the sealing ring 10, causing the sealing ring 10 to expand and tightly adhere to the inner wall of the pipe.

[0041] Example 5:

[0042] Based on the above embodiments, such as Figure 5 As shown, connector 1 is sleeved on the part to be tested, and sealing ring 10 is located on the inner surface of drive end 21. That is, this connection method is external clamping. By sleeved on the pipe, the compression sleeve squeezes the sealing ring 10 so that the sealing ring 10 expands out of the mounting groove and clamps the outer wall of the pipe.

[0043] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. An airtightness testing component, comprising a connector (1) and a drive component (2), wherein the connector (1) is used to connect to the part to be tested, characterized in that: The driving component (2) includes a driving end (21), which is provided with an air passage (3). One end of the driving end (21) is movably connected to the connector (1) through a ball head (4), and the other end of the driving end (21) is connected to an external air source. The air passage (3) connects the connector (1) to the external air source.

2. The airtightness detection component according to claim 1, characterized in that: The drive unit (2) also includes a cylinder (22), a portion of the drive end (21) is located inside the cylinder (22), and the cylinder (22) is provided with a force that acts on the drive end (21) so that the drive end (21) moves inside the cylinder (22) and drives the connector (1) to move closer to or away from the workpiece to be inspected.

3. The airtightness detection component according to claim 2, characterized in that: A gas chamber (5) is provided between the drive end (21) and the cylinder (22). A piston ring (211) located in the gas chamber (5) is provided on the outer surface of the drive end (21). A gas head (6) connected to the gas chamber (5) is provided at both ends of the gas chamber (5) in the direction of movement of the drive end (21).

4. The airtightness detection component according to claim 3, characterized in that: The piston ring (211) has stepped portions (2111) at both ends in the direction of movement of the drive end (21).

5. The airtightness detection component according to claim 3, characterized in that: The cylinder (22) has an air inlet (7) at the end away from the connector (1), and the orientation of the air inlet (7) is perpendicular to the direction of movement of the drive end (21).

6. The airtightness detection component according to claim 5, characterized in that: The cylinder body (22) is also provided with a detection port (8), which faces the air inlet (7).

7. The airtightness detection component according to claim 5, characterized in that: The cylinder (22) is also provided with an exhaust channel (9), which is located on the side of the air chamber (5) away from the connector (1).

8. The airtightness detection component according to claim 1, characterized in that: The connector (1) has an installation groove at one end away from the drive end (21), and a sealing ring (10) is provided in the installation groove. The connector (1) is also provided with an extrusion member (11), which is used to extrude the sealing ring (10) so that the sealing ring (10) is tightly attached to the workpiece to be inspected.

9. The airtightness detection component according to claim 8, characterized in that: The connector (1) is inserted into the part to be inspected, and the sealing ring (10) is fitted on the outer surface of the drive end (21).

10. The airtightness detection component according to claim 8, characterized in that: The connector (1) is fitted onto the part to be tested, and the sealing ring (10) is located on the inner surface of the drive end (21).

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