A bellows leak detection connector

Abstract

This utility model discloses a bellows leak detection connector, relating to the field of bellows testing fixtures. It includes a female connector body, a male connector body, a clamping component, a sealing ring, and a clamping screw, all coaxially arranged. The female connector body has a mounting hole machined within it. One end of the male connector body and the clamping component are both disposed within the mounting hole. The male connector body is threadedly connected to the female connector body. When the male connector body is threadedly tightened, the clamping component is fixed within the female connector body. The clamping component includes two semi-circular retaining rings that engage to form a circular shape. The inner ring of the clamping component is adapted to the shape of the outer corrugated trough of the bellows to be tested. One end of the clamping screw and the sealing ring are both disposed within the male connector body. The clamping screw is threadedly connected to the male connector body, and its end is adapted to the sealing ring. A through channel is machined axially within the clamping screw. This leak detection connector can be conveniently and quickly connected to the end of a bellows, allowing the bellows end to be directly connected to a testing pipeline or used for sealing.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe testing fixtures, specifically a corrugated pipe leakage detection connector. Background Technology

[0002] Leakage detection of bellows is a necessary quality inspection process before bellows are put into use. During the test, air is usually introduced into the bellows and pressurized, and the bellows is immersed in water to observe whether there is any leakage and to observe the location of the leak.

[0003] When performing leak detection on bellows, one end of the bellows needs to be sealed, and the other end connected to a pneumatic supply unit. Traditionally, plugs and pipe fittings are welded directly to both ends of the bellows. The other end of the pipe fitting is then connected to the pneumatic supply unit via a pipeline. Compressed air is then introduced to complete the test. After the test, the plugs and pipe fittings need to be removed by unsoldering. This entire process is time-consuming, labor-intensive, and inefficient. In the prior art, there are many tooling designs for leak and pressure resistance testing of bellows, such as Chinese patents for an aircraft bellows sealing pressure test fixture (application number CN201720713498.5), an aircraft bellows sealing pressure test fixture (CN201520777237.0), a bellows pressure test combination tooling (CN202321926508.5), and a bellows continuous tightness test tooling and circulating water injection method (CN202410216575.0), etc. However, these toolings have more or less defects such as relatively complex structure, inconvenient disassembly and assembly process, and poor flexibility. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bellows leak detection connector, which can be conveniently and quickly connected to the end of the bellows to expand the end of the bellows so that it can be directly connected to the detection equipment or sealed, which is conducive to efficiently completing the leak detection work of the bellows.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A bellows leak detection connector includes a female connector body, a male connector body, a clamping member, a sealing ring, and a clamping screw arranged coaxially. The female connector body has a mounting hole machined within it. One end of the male connector body and the clamping member are both disposed within the mounting hole. The male connector body is threadedly connected to the female connector body. When the male connector body is threadedly tightened, the clamping member is fixed within the female connector body. The clamping member includes two semi-circular retaining rings. The two retaining rings engage to form a circular shape for the clamping member. The inner ring of the clamping member is adapted to the shape of the outer corrugation trough of the bellows to be tested. One end of the clamping screw and the sealing ring are both disposed within the male connector body. The clamping screw is threadedly connected to the male connector body. The end of the clamping screw is adapted to the sealing ring. A through channel is machined axially within the clamping screw. The leak detection connector can be easily and quickly connected to the end of the bellows and ensure a sealing effect after connection. After connection, the leak detection connector expands the function of the bellows end, enabling the bellows to connect to external inspection pipelines or to seal the end of the bellows through the leak detection connector.

[0007] Specifically, the female connector body has an annular clamping end plate at the end away from the male connector body. One end of the clamping member abuts against the clamping end plate, and the other end of the clamping member is adapted to the end of the male connector body. When the male connector body is tightened, the end of the male connector body and the clamping end plate can clamp and fix the clamping member.

[0008] Specifically, the end of the retaining ring away from the clamping end plate is connected to an extension, and the end of the extension away from the retaining ring forms a semi-circular positioning end plate. The end of the male connector body near the clamping end plate is machined with an annular positioning groove, which is adapted to the positioning end plate. Through the positioning effect of the annular positioning groove and the positioning end plate, the clamping component and the male connector body can be ensured to be coaxial when the assembly is completed, thereby ensuring that the end of the bellows is coaxial with the male connector body.

[0009] Specifically, the end of the clamping screw is machined with a small-diameter boss, and one end of the sealing ring is fitted onto the small-diameter boss. During assembly, the sealing ring can be effectively prevented from shifting, thereby ensuring the sealing effect of the sealing ring when the assembly is completed.

[0010] As one implementation, it also includes a standard pipe fitting, one end of which is threaded into the end of the through channel away from the sealing ring, and the other end of which can be directly connected to the pipeline of an external testing device. That is, the end of the corrugated pipe can be connected to the pipeline of an external testing device through the leak detection fitting.

[0011] As another implementation, it also includes a plug, which is threaded into the end of the through channel away from the sealing ring. The plug can seal the through channel, that is, the plug can seal one end of the bellows.

[0012] Specifically, the leak detection connector is used on the bellows, and the retaining ring is engaged between the first and second crests near the end of the bellows, with the end of the bellows being adapted to the sealing ring.

[0013] The beneficial effects of this utility model are:

[0014] The bellows leak detection connector includes a female connector body, a male connector body, a clamping element, a sealing ring, and a tightening screw, all arranged coaxially. The clamping element comprises two semi-circular retaining rings that engage to form a circular clamping element. The inner ring of the clamping element is adapted to the shape of the outer trough of the bellows under test. The engagement of the two retaining rings clamps the end of the bellows. The female connector body has a machined mounting hole. After the clamping element clamps the bellows, it is inserted into the female connector body. Tightening the male connector body secures the clamping element within the female connector body. The sealing ring is located at one end of the tightening screw. An axial through-channel is machined within the tightening screw. Tightening the tightening screw connects the through-channel to the inner cavity of the bellows. Simultaneously, the pressure filling of the sealing ring maintains the seal at the connection point between the through-channel and the inner cavity of the bellows. Therefore, this leak detection connector can be easily and quickly connected to the end of the bellows and ensure a sealing effect after connection. After connection, the leak detection connector expands the function of the bellows end, enabling the bellows to be connected to external inspection pipelines or to seal the end of the bellows through the leak detection connector.

[0015] When performing leak detection on bellows, the two aforementioned leak detection connectors can be directly assembled into a testing fixture. The two connectors are respectively connected to both ends of the bellows. One connector has a plug threaded to the end of its through-channel furthest from the bellows for sealing, while the other connector has a standard pipe fitting threaded to the end of its through-channel furthest from the bellows. Thus, the standard pipe fitting allows direct connection to the piping of external testing equipment. After immersing the bellows in water, compressed air is injected into the bellows by the external testing equipment to complete the leak detection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a bellows leakage detection connector according to the present invention;

[0017] Figure 2 for Figure 1 An exploded view of the bellows leak detection connector shown.

[0018] Figure 3 for Figure 1The cross-sectional view of the bellows leak detection connector shown.

[0019] In the diagram, 1-corrugated pipe, 2-female connector body, 3-male connector body, 4-clamping ring, 5-sealing ring, 6-clamping screw, 7-standard pipe connector, 8-clamping end plate, 9-positioning end plate, 10-small diameter boss. Detailed Implementation

[0020] The technical solution of this utility model is described in further detail below with reference to the accompanying drawings, but the scope of protection of this utility model is not limited to the following description.

[0021] like Figures 1 to 3 As shown, a bellows leak detection connector includes a female connector body 2, a male connector body 3, a clamping member, a sealing ring 5, and a clamping screw 6, all coaxially arranged. The female connector body 2 has a mounting hole machined inside. One end of the male connector body 3 and the clamping member are both disposed within the mounting hole. The male connector body 3 is threadedly connected to the female connector body 2. When the male connector body 3 is threadedly tightened, the clamping member is fixed inside the female connector body 2. The clamping member has a split structure, including two semi-circular retaining rings 4. The two retaining rings 4 snap together to make the clamping member form a ring shape. The inner ring of the clamping member is adapted to the shape of the outer corrugation trough of the bellows to be tested. One end of the clamping screw 6 and the sealing ring 5 are both disposed inside the male connector body 3. The clamping screw 6 is threadedly connected to the male connector body 3. The end of the clamping screw 6 is adapted to the sealing ring 5. A through channel is machined axially inside the clamping screw 6.

[0022] The leak detection connector can be directly connected to the end of the bellows 1 during use (the attached diagram only shows the shape of the end of the bellows 1 and does not depict the complete bellows 1). The assembly process at the end of the bellows 1 is as follows:

[0023] S1. Pass one end of the corrugated pipe 1 through the female connector body 2, so that the female connector body 2 is fitted onto the pipe body of the corrugated pipe 1.

[0024] S2. Attach the two retaining rings 4 between the first and second crests near the end of the bellows 1, and close the two retaining rings 4 together to form a clamping component.

[0025] S3. Retract the female connector body 2 to the end position of the bellows 1, so that the clamping part is inserted into the female connector body 1;

[0026] S4. Screw one end of the male connector 3 into the end of the female connector 2 away from the bellows 1. When the thread is tightened, the clamping part is fixed inside the female connector 3. At this time, the end of the bellows 1 is clamped by the clamping part and is also fixed inside the female connector 3.

[0027] S5. Insert one end of the sealing ring 5 and the clamping screw 6 into the male connector body 3, and then thread the clamping screw to the end of the male connector body 3 away from the bellows 1 until the thread is tightened. The end of the clamping screw 6 and the end of the bellows 1 will press the sealing ring 5 to complete the seal.

[0028] The above describes the installation process of the leak detection connector at the end of the bellows 1. After installation, the leak detection connector can expand the end of the bellows 1. During installation, the through-channel is connected to the inner cavity of the bellows 1. Simultaneously, with the sealing ring 5 being compressed and filled, the connection interface between the through-channel and the inner cavity of the bellows 1 has good sealing performance. This allows the through-channel to be connected to the pipeline of external testing equipment, enabling direct inflation and pressurization of the bellows 1. Sealing the through-channel seals one end of the bellows 1. In this leak detection connector, the female connector body 2 and the male connector body 3, as well as the male connector body 3 and the clamping screw 6, are all threaded connections, making assembly and disassembly quick and convenient.

[0029] When performing leak detection on bellows 1, both ends of bellows 1 are equipped with leak detection connectors as described above. One leak detection connector is equipped with a standard pipe connector 7, one end of which is threaded into the end of the through channel away from the sealing ring 5. The other leak detection connector is equipped with a plug (not shown in the diagram), which is also threaded into the end of the through channel away from the sealing ring 5. The plug is used to seal the through channel of the leak detection connector. Thus, the two leak detection connectors constitute the detection fixture. During leak detection, the standard pipe connector 7 is directly connected to the pipeline of the detection equipment to inflate and pressurize the bellows 1. The entire bellows 1 and the leak detection connectors at both ends are then immersed in water to complete the leak detection.

[0030] Because the leak detection connector can be easily and quickly assembled and disassembled on the bellows 1, the entire testing fixture has the advantage of convenient operation, which helps to improve testing efficiency. Due to its simple and compact structure, the leak detection connector is not restricted by the environment during testing and can be applied to the testing of bellows 1 of any length and in any bent state, exhibiting high flexibility. It should also be noted that the clamping component is engaged between the first and second crests at the end of the bellows 1. Therefore, when performing leak detection by immersion, the presence of leaks in the body of the bellows 1, excluding the two ends, can be directly observed. The ends of the bellows 1 can be supplemented by direct observation after the immersion test. Since the area undetected at the end of the bellows 1 during the immersion test is only the width of one crest, this area is small, and supplementing the test through direct observation will not incur excessive workload.

[0031] In specific implementation, a circular clamping end plate 8 is formed at the end of the female connector 2 away from the male connector 3. One end of the clamping member abuts against the clamping end plate 8, and the other end of the clamping member is adapted to the end of the male connector 3. When the male connector 3 is tightened, the end of the male connector 3 and the clamping end plate 8 can clamp and fix the clamping member. It should be understood that the clamping member can be assembled in the aforementioned manner as a circular ring plate thin sheet structure. However, under this structure, if the outer circle of the clamping member differs significantly from the size of the mounting hole of the female connector 2, it is inevitable that the clamping member will deviate from the axis when it is placed into the mounting hole, resulting in inaccurate centering of the clamping member and the end of the bellows 1 in the mounting hole, thereby affecting the sealing effect of the sealing ring 5. On the other hand, if it is necessary to keep the clamping member coaxial with the mounting hole when it is placed into the mounting hole, the outer circle of the clamping member must be close to the size of the mounting hole in the form of a circular ring thin sheet structure, which will make the installation of the clamping member in the mounting hole inconvenient. Therefore, further, the end of the retaining ring 4 away from the clamping end plate 8 is connected to an extension, and a positioning end plate 9 is formed at the end of the extension away from the retaining ring 4. When the two retaining rings 4 are fastened together, the two positioning end plates are also fastened together into a ring shape. The end of the male connector body 3 near the clamping end plate 8 is machined with an annular positioning groove, which is adapted to the positioning end plate 9. In the aforementioned step S2, when the two retaining rings 4 are closed and fastened together to form a clamping component, the two positioning end plates 9 are clamped into the annular positioning groove for positioning. This ensures convenient assembly and allows the clamping component and the end of the bellows 1 to be centered after assembly, thereby ensuring the sealing effect of the end face of the sealing ring 5.

[0032] In specific implementation, the end of the clamping screw 6 is machined with a small diameter boss 10, and one end of the sealing ring 5 is fitted onto the small diameter boss 10. In the aforementioned step S5, the sealing ring 5 is first fitted onto the small diameter boss 10, and then the clamping screw 6 is screwed into the male connector body 3. This ensures that the sealing ring 5 does not shift during assembly, which helps to ensure that the ends of the sealing ring 5, the clamping screw 6, and the bellows 1 are coaxial, thereby ensuring the sealing effect of the sealing ring 5 after assembly.

[0033] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A bellows leak detection fitting, characterized by, Includes a coaxially mounted female connector body, male connector body, clamping components, sealing ring, and clamping screws. The female connector body has a mounting hole, one end of the male connector body and the clamping member are both disposed in the mounting hole, the male connector body is threadedly connected to the female connector body, and when the male connector body is threadedly tightened, the clamping member can be fixed in the female connector body; The clamping member includes two semi-circular retaining rings. The two retaining rings are fastened together to make the clamping member circular. The inner ring of the clamping member is adapted to the shape of the outer trough position of the bellows to be tested. One end of the clamping screw and the sealing ring are both located in the male connector body. The clamping screw is threaded to the male connector body. The end of the clamping screw is adapted to the sealing ring. A through channel is machined in the clamping screw along the axial direction.

2. A bellows leak detection fitting according to claim 1, wherein, The female connector body has an annular clamping end plate at the end away from the male connector body. One end of the clamping member abuts against the clamping end plate, and the other end of the clamping member is adapted to the end of the male connector body.

3. A bellows leak detection fitting according to claim 2, wherein, The end of the retaining ring away from the clamping end plate is connected to an extension, and the end of the extension away from the retaining ring forms a semi-circular positioning end plate. The end of the male connector body near the clamping end plate is machined with an annular positioning groove, which is adapted to the positioning end plate.

4. A bellows leak detection fitting according to claim 1, wherein, The end of the clamping screw is machined with a small-diameter boss, and one end of the sealing ring is fitted onto the small-diameter boss.

5. A bellows leak detection fitting according to any one of claims 1 to 4, wherein, It also includes a standard pipe fitting, one end of which is threaded into the end of the through channel away from the sealing ring.

6. A bellows leak detection fitting according to any one of claims 1 to 4, wherein, It also includes a plug, which is threaded into the end of the through passage away from the sealing ring.

7. A bellows leak detection fitting according to any one of claims 1 to 4, wherein, In the case of a bellows, the retaining ring is engaged between the first and second crests near the end of the bellows, and the end of the bellows is adapted to the sealing ring.

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