Tool for testing air tightness of inner hole of pipe

Abstract

The utility model discloses an air tightness testing tool for an inner hole of a pipe, and relates to the technical field of air tightness detection. The surface of the inner pipe is fixedly connected with an inner cylinder, the right side of the inner cylinder and the surface of the inner pipe are fixedly connected with threaded cylinders, and the surfaces of the threaded cylinders are in threaded connection with an outer pipe. According to the utility model, through the cooperation of the inner pipe, the inner cylinder, the threaded cylinder, the outer pipe, the extrusion ring, the chute, the guide column, the rubber sealing ring and the blocking nut, after a user inserts the right end of the testing tool into a hole of a tested pipe, the rubber sealing ring can be contacted with the inner wall of the tested pipe by rotating the outer pipe, so that the testing efficiency is improved. The right end of the testing tool is fixed in the hole of the tested pipe through the friction force between the rubber sealing ring and the tested pipe, so that the testing tool can be directly connected with the inner wall of the tested pipe, and the testing tool can adapt to the tested pipes with the same inner diameter and different outer diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a tool for testing the air tightness of an inner hole of a pipe. Background Art

[0002] Airtightness testing typically involves using an instrument to evacuate the sealed cavity of the product being tested to a target negative pressure. The instrument then monitors pressure changes during the extraction and testing phases to determine if the product is leaking. Currently, most test fixtures for airtightness testing of pipe holes connect and seal by clamping onto the outer diameter of the pipe. However, if the outer diameter of the pipe changes, the test fixture must be resized before use, resulting in a limited adaptability. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a tool for testing the air tightness of inner holes in pipes, so as to improve the compatibility of the testing tool.

[0004] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

[0005] A tool for testing the air tightness of inner holes in pipes, comprising an inner tube, the surface of the inner tube is fixedly connected to an inner cylinder, the right side of the inner cylinder and the surface of the inner tube are fixedly connected to a threaded cylinder, the surface of the threaded cylinder is threadedly connected to an outer tube, the right side of the outer tube and the surface of the inner tube are both fitted with an extrusion ring, the inner wall of the extrusion ring is provided with a sliding groove, the upper surface of the inner tube is fixedly connected to a guide column, the surface of the guide column is in contact with the inner wall of the sliding groove, the right side of the extrusion ring and the surface of the inner tube are both fitted with a rubber sealing ring, the surface of the inner tube is threadedly connected to a blocking nut, and the left side of the blocking nut is in contact with the right side of the rubber sealing ring.

[0006] Preferably, the inner wall of the inner tube is threadedly connected to a main quick connector.

[0007] Preferably, a strip groove is provided on the surface of the inner cylinder, an outer cylinder is sleeved on the surface of the inner cylinder, a hollow block is fixedly connected to the inner wall of the outer cylinder, the surface of the hollow block is in contact with the inner wall of the strip groove, a spring is fixedly connected to the inner wall of the hollow block and the left side of the inner wall of the strip groove, a U-shaped rubber pad is bonded to the inner wall of the strip groove, and a spare quick connector is fitted on the inner wall of the U-shaped rubber pad.

[0008] Preferably, the elastic force of the spring is greater than the sum of the gravity of the outer cylinder and the hollow block.

[0009] Preferably, the friction force between the U-shaped rubber pad and the spare quick connector is greater than the gravity of the spare quick connector.

[0010] Preferably, a marking block is fixedly connected to the surface of the inner cylinder, and the left side of the marking block contacts the right side of the outer cylinder.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model cooperates with the inner tube, the inner cylinder, the threaded cylinder, the outer tube, the extrusion ring, the slide groove, the guide column, the rubber sealing ring and the blocking nut, so that the user can insert the right end of the test tool into the hole of the measured pipe and then rotate the outer tube to make the rubber sealing ring contact with the inner wall of the measured pipe. The right end of the test tool is fixed in the hole of the measured pipe through the friction between the rubber sealing ring and the measured pipe, so that the test tool can be directly connected to the inner wall of the measured pipe, so that the test tool can adapt to the measured pipes with the same inner diameter but different outer diameters.

[0013] The utility model enables the test fixture to store spare quick connectors through the cooperation of the inner cylinder, the strip groove, the outer cylinder, the hollow block, the spring and the U-shaped rubber pad, so that the user can quickly find and install the spare quick connector when replacing the quick connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 for Figure 1 Cross-sectional view at the middle BB.

[0017] Figure 4 for Figure 1 Front view of .

[0018] Figure 5 for Figure 1 Right view of the center extrusion ring.

[0019] In the figure: 1. Inner tube; 2. Inner cylinder; 3. Threaded cylinder; 4. Outer tube; 5. Extrusion ring; 6. Slide groove; 7. Guide column; 8. Rubber sealing ring; 9. Block nut; 10. Main quick connector; 11. Strip groove; 12. Outer cylinder; 13. Hollow block; 14. Spring; 15. U-shaped rubber pad; 16. Spare quick connector; 17. Marking block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0022] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the utility model is used for the air tightness test tool of the pipe inner hole, which includes an inner tube 1, the surface of the inner tube 1 is fixedly connected with the inner tube 2, the right side of the inner tube 2 and the surface of the inner tube 1 are fixedly connected with a threaded tube 3, the surface of the threaded tube 3 is threadedly connected with the outer tube 4, the surface of the threaded tube 3 and the inner wall of the outer tube 4 are provided with threads, when the outer tube 4 rotates, the distance between the outer tube 4 and the inner tube 2 can be changed by the threads, the right side of the outer tube 4 and the surface of the inner tube 1 are fitted with an extrusion ring 5, the inner wall of the extrusion ring 5 is provided with a slide groove 6, the upper surface of the inner tube 1 is fixedly connected with a guide column 7, the surface of the guide column 7 is in contact with the inner wall of the slide groove 6, and the extrusion ring is made to rotate with the guide column 7. 5 can only move left and right on the inner tube 1. The right side of the extrusion ring 5 and the surface of the inner tube 1 are both fitted with a rubber sealing ring 8. The surface of the inner tube 1 is threadedly connected with a blocking nut 9. The left side of the blocking nut 9 contacts the right side of the rubber sealing ring 8. The right side of the rubber sealing ring 8 is limited by the blocking nut 9. When the extrusion ring 5 moves to the right, the rubber sealing ring 8 is squeezed and expanded by the cooperation of the extrusion ring 5 and the blocking nut 9. When the extrusion ring 5 moves to the left, the rubber sealing ring 8 returns to its initial state due to its own elasticity. The inner wall of the inner tube 1 is threadedly connected with a main quick connector 10, which can be connected to the air pipe on the airtightness detection instrument.

[0023] The surface of the inner cylinder 2 is provided with a strip groove 11, and the surface of the inner cylinder 2 is provided with an outer cylinder 12, and the strip groove 11 can be sealed by the outer cylinder 12. The inner wall of the outer cylinder 12 is fixedly connected with a hollow block 13, and the surface of the hollow block 13 contacts the inner wall of the strip groove 11. The inner wall of the hollow block 13 and the left side of the inner wall of the strip groove 11 are fixedly connected with a spring 14. The elastic force of the spring 14 is greater than the sum of the gravity of the outer cylinder 12 and the hollow block 13. Through the elastic force of the spring 14, the user needs to apply an external force to the outer cylinder 12 to move the outer cylinder 12. A U-shaped rubber pad 15 is bonded to the inner wall of the strip groove 11, and a spare quick connector 16 is provided on the inner wall of the U-shaped rubber pad 15. The U-shaped rubber pad 15 is attached to the spare quick connector 1 6 is greater than the gravity of the spare quick connector 16. When the spare quick connector 16 is inserted into the U-shaped rubber pad 15, the friction between the U-shaped rubber pad 15 and the spare quick connector 16 prevents the spare quick connector 16 from falling out of the strip groove 11. A marking block 17 is fixedly connected to the surface of the inner cylinder 2. The left side of the marking block 17 contacts the right side of the outer cylinder 12. The model of the spare quick connector 16 can be the same as or different from the model of the main quick connector 10. When the model of the spare quick connector 16 is different from the model of the main quick connector 10, the model of the spare quick connector 16 can be marked by the marking block 17, so that the user can quickly find the appropriate spare quick connector 16.

[0024] The surface of the outer cylinder 12 and the surface of the outer tube 4 are both provided with anti-skid patterns, which prevent the user from slipping when rotating the outer cylinder 12 and the outer tube 4.

[0025] When the cam 12 is in the closed position, the cam 12 is in the closed position, and the cam 12 is in the closed position, so that the cam 12 is in the closed position and the cam 12 is in the closed position.

[0026] After the test is completed, the outer tube 4 is rotated to make the outer tube 4 contact with the inner tube 2, and the elasticity of the rubber sealing ring 8 is used to separate the rubber sealing ring 8 from the inner wall of the tested pipe hole. At this time, the test fixture can be separated from the tested pipe.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tool for testing the air tightness of a pipe inner hole, comprising an inner pipe (1), characterized in that: The surface of the inner tube (1) is fixedly connected to the inner tube (2), the right side of the inner tube (2) and the surface of the inner tube (1) are fixedly connected to the threaded tube (3), the surface of the threaded tube (3) is threadedly connected to the outer tube (4), the right side of the outer tube (4) and the surface of the inner tube (1) are both fitted with an extrusion ring (5), the inner wall of the extrusion ring (5) is provided with a slide groove (6), the upper surface of the inner tube (1) is fixedly connected to a guide column (7), the surface of the guide column (7) is in contact with the inner wall of the slide groove (6), the right side of the extrusion ring (5) and the surface of the inner tube (1) are both fitted with a rubber sealing ring (8), the surface of the inner tube (1) is threadedly connected to a blocking nut (9), the left side of the blocking nut (9) is in contact with the right side of the rubber sealing ring (8).

2. The tool for testing the air tightness of a pipe inner hole according to claim 1, characterized in that: The inner wall of the inner tube (1) is threadedly connected to a main quick connector (10).

3. The tool for testing the air tightness of a pipe inner hole according to claim 1, characterized in that: The surface of the inner cylinder (2) is provided with a strip groove (11), the surface of the inner cylinder (2) is sleeved with an outer cylinder (12), the inner wall of the outer cylinder (12) is fixedly connected with a hollow block (13), the surface of the hollow block (13) is in contact with the inner wall of the strip groove (11), the inner wall of the hollow block (13) and the left side of the inner wall of the strip groove (11) are fixedly connected with a spring (14), the inner wall of the strip groove (11) is bonded with a U-shaped rubber pad (15), and the inner wall of the U-shaped rubber pad (15) is fitted with a spare quick connector (16).

4. The tool for testing the air tightness of a pipe inner hole according to claim 3, characterized in that: The elastic force of the spring (14) is greater than the sum of the gravity of the outer cylinder (12) and the hollow block (13).

5. The tool for testing the air tightness of a pipe inner hole according to claim 3, characterized in that: The friction force between the U-shaped rubber pad (15) and the spare quick connector (16) is greater than the weight of the spare quick connector (16).

6. The tool for testing the air tightness of a pipe inner hole according to claim 3, characterized in that: A marking block (17) is fixedly connected to the surface of the inner cylinder (2), and the left side of the marking block (17) contacts the right side of the outer cylinder (12).

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