Gas detection clamp for corrugated pipe assembly

Abstract

The utility model provides a gas detection clamp for a corrugated pipe assembly. The gas detection clamp comprises a screw, a nut, an alcohol groove, a sealing ring and a clamp body, when gas is introduced into the gas guide channel, if the corrugated pipe has no crack or opening, the gas is only introduced into the inner cavity and cannot be guided out under the action of the sealing ring; if the corrugated pipe is provided with a crack, the gas enters the corrugated pipe from the crack, then enters the nut through the upper end of the corrugated pipe and the gap between the upper supporting sleeve and the supporting column, then passes through the alcohol tank and is discharged through the gas outlet channel, and alcohol can form bubbles when passing through the alcohol tank, so that whether the corrugated pipe leaks gas or not is judged. According to the utility model, the air detection test can be effectively carried out on the corrugated pipe assembly, and the corrugated pipe cannot generate compression displacement.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows assemblies, in particular to a gas inspection fixture for bellows assemblies. Background Art

[0002] Open-end bellows assemblies are welded together with machined parts at both ends. To ensure airtightness, a gas inspection test is required to screen out any bellows assemblies that fail the welding procedure. Currently, gas inspection tests are typically performed using a helium mass spectrometer. However, the bellows in the bellows assembly undergoes compression displacement during helium mass spectrometer leak testing, which can affect the performance of the bellows. Utility Model Content

[0003] The purpose of the utility model is to effectively carry out a gas inspection test on a bellows assembly without causing compression displacement of the bellows.

[0004] The technical solution of the utility model is:

[0005] Provided is a gas detection fixture for a bellows assembly, comprising a screw 1, a nut 2, an alcohol tank 3, a sealing ring 4 and a clamp body 5;

[0006] The clamp body 5 is formed with an inner cavity with an upper opening, and an air guide channel is opened at the lower part of the clamp body and connected to the inner cavity;

[0007] The inner cavity can accommodate a bellows assembly, the nut is threadedly engaged with the clamp body, and the nut can form a closed space in the inner cavity; the bellows assembly includes a lower plug, a support column and an upper inner support sleeve, the lower plug is fixedly and sealedly connected to the lower end of the bellows, the lower end of the support column is fixed to the lower plug, the upper support sleeve is fixed to the upper end of the bellows, and the upper support sleeve is sleeved on the upper end of the support column;

[0008] The alcohol tank 3 and the sealing ring 4 are arranged in the nut, and when the bellows assembly is located in the inner cavity, the nut presses the alcohol tank 3, and the alcohol tank 3 presses the upper support sleeve and the sealing ring, and the sealing ring is arranged between the upper support sleeve and the upper opening of the inner cavity;

[0009] The alcohol tank 3 is an annular structure with an opening for holding alcohol;

[0010] The nut is provided with an air outlet channel, and the air outlet channel extends to the alcohol tank 3;

[0011] When gas is passed into the air guide channel, if the bellows has no cracks or openings, the gas will only pass into the inner cavity and will not be discharged due to the action of the sealing ring; if the bellows has cracks, the gas will enter the bellows from the cracks, and then pass through the gap between the upper end of the bellows, the upper support sleeve and the support column into the nut, and then pass through the alcohol tank and be discharged from the air outlet channel. When passing through the alcohol tank, the alcohol will form bubbles, thereby judging whether the bellows is leaking.

[0012] Furthermore, the nut is provided with a central threaded hole, the screw 1 passes through the threaded hole and is threadedly engaged with the threaded hole. Rotating the screw can make the lower end of the screw dock and press the upper end of the support column to keep the support column fixed.

[0013] Furthermore, it also includes small screws 6 and nuts 7 for fixing the clamp body 5 on the gas inspection table.

[0014] Furthermore, a flange is formed on the lower portion of the clamp body 5 and is provided with three evenly distributed mounting holes, which are adapted to the small screws 6 and nuts 7 .

[0015] Furthermore, the nut 2 and the alcohol tank 3 are fixedly connected by interference fit.

[0016] Furthermore, the nut 2 is provided with four through holes.

[0017] Furthermore, the groove of the alcohol tank (3) is an annular groove.

[0018] Furthermore, the lower end of the screw (1) has a tapered groove, the upper end of the support column is a conical end, and the tapered groove is adapted to the cone of the conical end.

[0019] The utility model has the advantages that the utility model can effectively perform gas detection tests on the bellows assembly and will not cause compression displacement of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the gas inspection fixture for the bellows assembly of the utility model;

[0021] Figure 2 This is a schematic diagram of the initial state of the utility model before testing;

[0022] Figure 3 This is a schematic diagram of the utility model after installation before testing;

[0023] Figure 4 It is a schematic diagram of the testing process of the utility model;

[0024] Figure 5 It is a schematic diagram of the end of the test of the utility model;

[0025] Figure 6 is a schematic diagram of a bellows assembly;

[0026] Among them: 1-screw, 2-nut, 3-alcohol tank, 4-sealing ring, 5-clamp body, 6-small screw, 7-small nut, 8-upper inner support sleeve, 9-support column, 10-bellows, 11-lower plug. DETAILED DESCRIPTION

[0027] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples can be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0028] See also Figure 1 , Schematic diagram of the structure of the gas detection fixture for the bellows assembly of the utility model. Provided is a gas detection fixture for the bellows assembly, including a screw 1, a nut 2, an alcohol tank 3, a sealing ring 4 and a clamp body 5;

[0029] The clamp body (5) is formed with an inner cavity with an upper opening, and an air guide channel is opened at the lower part of the clamp body and is connected to the inner cavity;

[0030] The inner cavity can accommodate a bellows assembly, the nut is threadedly engaged with the clamp body, and the nut can form a closed space in the inner cavity; the bellows assembly includes a lower plug, a support column and an upper inner support sleeve, the lower plug is fixedly and sealedly connected to the lower end of the bellows, the lower end of the support column is fixed to the lower plug, the upper support sleeve is fixed to the upper end of the bellows, and the upper support sleeve is sleeved on the upper end of the support column;

[0031] The alcohol tank 3 and the sealing ring 4 are arranged in the nut, and when the bellows assembly is located in the inner cavity, the nut presses the alcohol tank 3, and the alcohol tank 3 presses the upper support sleeve and the sealing ring, and the sealing ring is arranged between the upper support sleeve and the upper opening of the inner cavity;

[0032] The alcohol tank 3 is an annular structure with an opening for holding alcohol;

[0033] The nut is provided with an air outlet channel, and the air outlet channel extends to the alcohol tank 3;

[0034] When gas is introduced into the air guide channel, if the bellows has no cracks or openings, the gas will only pass into the inner cavity and will not be discharged due to the action of the sealing ring; if the bellows has cracks, the gas will enter the bellows through the cracks, and then pass through the gap between the upper end of the bellows, the upper support sleeve and the support column into the nut, and then pass through the alcohol tank and be discharged from the air outlet channel. When passing through the alcohol tank, the alcohol will form bubbles, thereby judging whether the bellows is leaking;

[0035] The nut has a central threaded hole, and the screw 1 passes through the threaded hole and is threadedly engaged with the threaded hole. Rotating the screw can make the lower end of the screw dock and press the upper end of the support column to keep the support column fixed.

[0036] Furthermore, it also includes small screws 6 and nuts 7 for fixing the clamp body 5 on the gas inspection table.

[0037] Furthermore, a flange is formed on the lower portion of the clamp body 5 and is provided with three evenly distributed mounting holes, which are adapted to the small screws 6 and nuts 7 .

[0038] Furthermore, the nut 2 and the alcohol tank 3 are fixedly connected by interference fit.

[0039] Furthermore, the nut 2 is provided with four through holes.

[0040] Furthermore, the groove of the alcohol tank (3) is an annular groove.

[0041] Furthermore, the lower end of the screw (1) has a tapered groove, the upper end of the support column is a conical end, and the tapered groove is adapted to the cone of the conical end.

[0042] The working principle of this utility model is:

[0043] like Figure 4 As shown, ventilation is performed from the lower end of the clamp body (5) through the air inspection table to observe whether bubbles are generated in the alcohol tank. If not, there is no air leakage; if there is, the opening piece bellows is leaking.

[0044] The utility model realizes the gas detection test of the opening piece bellows assembly, so that the bellows does not produce compression displacement during the gas detection process, thereby meeting the gas detection test requirements.

[0045] Example 1:

[0046] Inner diameter of clamp body (5) Inner diameter of nut (2) Alcohol tank (3) outer diameter

[0047] The description of various advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples disclosed. Many modifications and variations will be apparent to those skilled in the art. In addition, different advantageous examples may describe different advantages compared to other advantageous examples. The selected example or examples are chosen and described to best illustrate the principles of the examples, their practical application, and to enable those skilled in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A gas inspection fixture for a bellows assembly, characterized in that: It includes a screw (1), a nut (2), an alcohol tank (3), a sealing ring (4) and a clamp body (5); The bellows assembly includes a lower plug, a support column and an upper support sleeve. The lower plug is fixedly and sealedly connected to the lower end of the bellows, the lower end of the support column is fixed to the lower plug, and the upper support sleeve is fixed to the upper end of the bellows, and the upper support sleeve is sleeved on the upper end of the support column. The clamp body (5) is formed with an inner cavity with an upper opening, and an air guide channel is opened at the lower part of the clamp body and is connected to the inner cavity; The inner cavity can accommodate a bellows assembly, and the nut is threadedly engaged with the clamp body, so that the inner cavity can form a closed space; The alcohol tank (3) and the sealing ring (4) are arranged in the nut, and when the bellows assembly is located in the inner cavity, the nut presses the alcohol tank (3), and the alcohol tank (3) presses the upper support sleeve and the sealing ring, and the sealing ring is arranged between the upper support sleeve and the upper opening of the inner cavity; The alcohol tank (3) is an annular structure with an opening for holding alcohol; The nut is provided with a through hole, and the through hole corresponds to the alcohol tank (3); When gas is passed into the air guide channel, if the bellows has no cracks or openings, the gas will only pass into the inner cavity and will not be discharged due to the action of the sealing ring; if the bellows has cracks, the gas will enter the bellows from the cracks, and then pass through the gap between the upper end of the bellows, the upper support sleeve and the support column into the nut, and then pass through the alcohol tank and be discharged from the air guide channel. When passing through the alcohol tank, the alcohol will form bubbles, thereby judging whether the bellows is leaking.

2. A gas inspection fixture for a bellows assembly as claimed in claim 1, characterized in that: The nut is provided with a central threaded hole, and the screw (1) passes through the threaded hole and is threadably matched with the threaded hole. By rotating the screw, the lower end of the screw can be butted against the upper end of the support column to hold the support column fixed.

3. The gas inspection fixture for a bellows assembly according to claim 1, characterized in that: The lower part of the clamp body (5) is formed with a flange and is provided with three evenly distributed mounting holes, and the mounting holes are adapted to small screws (6) and nuts.

4. A gas inspection fixture for a bellows assembly as claimed in claim 1, characterized in that: The nut (2) and the alcohol tank (3) are fixedly connected through interference fit.

5. The gas inspection fixture for a bellows assembly according to claim 1, characterized in that: The nut (2) is provided with four through holes.

6. A gas inspection fixture for a bellows assembly as claimed in claim 1, characterized in that: The groove of the alcohol tank (3) is an annular groove.

7. The gas inspection fixture for a bellows assembly according to claim 1, characterized in that: The lower end of the screw (1) is provided with a tapered groove, the upper end of the support column is a conical end, and the tapered groove is adapted to the cone of the conical end.

8. The gas inspection fixture for a bellows assembly according to claim 1, characterized in that: It also includes small screws (6) and corresponding nuts for fixing the clamp body on the gas inspection table.

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