Test tool for air tightness inspection

Abstract

The utility model discloses a test tool for air tightness inspection, which belongs to the technical field of test tools and comprises a base, moving seats are arranged at two ends of the top of the base, mounting plates are fixedly welded at the tops of the moving seats, extension columns are arranged at the top ends of the opposite sides of the two mounting plates, and air injection pipes are arranged at the tail ends of the extension columns. A first air pump is arranged on one side of the mounting plate, a pressure sensor is arranged on one side of the tail end of the extension column, an annular air bag is arranged on the periphery of one end of the extension column, and a second air pump is mounted on one side of the outer portion of the mounting plate. According to the air tightness detection device, the air injection amount in the air bag is only needed to be increased when air tightness detection is carried out on circular pipes of different specifications, the purpose of sealing the two ends of the circular pipes can be achieved, the first air pump injects air into the circular pipes through the air injection pipe, the air tightness detection is carried out on the circular pipes in cooperation with the pressure sensor, and the applicability of the device is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of test tooling, and particularly relates to a test tooling for air tightness inspection. Background Technique

[0002] In the machinery manufacturing industry, many workpieces have requirements for airtightness. Inspecting the airtightness of large round tube parts is undoubtedly a huge project.

[0003] At present, for the existing test tooling for airtightness inspection, when inspecting the airtightness of round tube parts, due to the different inner diameters of round tubes with different specifications, corresponding types of seals are required to seal both ends of the round tube, which reduces the applicability of the test tooling and is not conducive to inspecting the airtightness of round tubes with different model specifications. Therefore, we propose a test tooling for airtightness inspection. Content of the Utility Model

[0004] The purpose of the utility model is to provide a test tooling for airtightness inspection to solve the existing problems mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A test tooling for airtightness inspection, including a base, extension columns and air bags. At both ends of the top of the base, moving seats are movably arranged. Installation plates are fixedly welded to the tops of the moving seats. Extension columns are arranged at the top ends of the opposite sides of the two installation plates. An air injection pipe is arranged at the end of the extension column. A first air pump is fixedly installed on the side of the installation plate away from the extension column. The first air pump is hermetically communicated with the air injection pipe through a conduit. A pressure sensor is fixedly embedded on one side of the end of the extension column. An annular air bag is sleeved on the outer periphery of the end of the extension column close to the air injection pipe by gluing. A second air pump is installed on the outer side of the installation plate. The second air pump is hermetically communicated with the inside of the annular air bag through a conduit.

[0006] Preferably, sliding grooves are opened on both sides of the top of the base. A bidirectional screw rod is arranged inside the sliding grooves. One end of the bidirectional screw rod is fixedly installed with a driving motor. The end of the output shaft of the driving motor is fixedly connected to one end of the bidirectional screw rod. Sliding blocks are arranged at both ends of the outer periphery of the bidirectional screw rod. The sliding blocks are of U-shaped structure. The two ends of the top of the sliding blocks pass through the sliding grooves and are fixedly connected to the bottom of the moving seat. The middle part of the bottom end of the sliding block is spirally connected to the bidirectional screw rod through an inlaid threaded sleeve.

[0007] Preferably, a sealing valve is arranged at the end of the air injection pipe connected to the first air pump, and a sealing valve is also arranged in the middle of the conduit arranged between the air bag and the second air pump.

[0008] Preferably, a bracket is arranged below the extension column. The bracket is fixedly connected to one side of the installation plate by welding.

[0009] Preferably, a limiting rod is arranged inside the sliding groove. Both ends of the limiting rod are fixedly connected to the inner walls of both ends of the sliding groove by welding. Both sides of the bottom end of the slider are sleeved on the outer periphery of the limiting rod and are slidably connected thereto.

[0010] Preferably, a control panel is arranged on one side of the top of the base. The control panel is fixedly installed on one side of the top of the base by means of inlaying.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By arranging extension columns at the same height on the opposite sides of the two mounting plates and arranging air bags on their outer peripheries, and using a second air pump to inject air into the air bags, the air bags are inflated, so as to seal both ends of the round tube. When performing airtightness inspection on round tubes of different specifications, only by increasing the air injection volume inside the air bags can the purpose of sealing both ends of the round tube be achieved, so as to facilitate the first air pump to inject air into its interior through the air injection pipe, and cooperate with the pressure sensor to achieve the purpose of performing airtightness inspection on the round tube, greatly improving the applicability of the equipment.

[0013] 2. By arranging a bidirectional screw inside the sliding groove of the base and using a driving motor to control the forward and reverse rotation of the bidirectional screw, the distance between the two extension columns can be adjusted, so as to achieve the purpose of installing the round tube, enabling it to be applicable to the airtightness inspection of round tubes of different lengths, and greatly improving the applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the bidirectional screw structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the air bag structure of the present utility model.

[0017] In the figure: 1. Base; 2. Control panel; 3. Sliding groove; 4. Bidirectional screw; 5. Driving motor; 6. Limiting rod; 7. Moving seat; 8. Slider; 9. Threaded sleeve; 10. Mounting plate; 11. Bracket; 12. Extension column; 13. Air injection pipe; 14. First air pump; 15. Pressure sensor; 16. Air bag; 17. Second air pump; 18. Sealing valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-3 , the present invention provides a technical solution for a test tool for airtightness inspection: including a base 1, an extension column 12 and an airbag 16. Moving seats 7 are movably arranged at both ends of the top of the base 1. Installation plates 10 are fixedly welded to the tops of the moving seats 7. Extension columns 12 are arranged at the top ends of the opposite sides of the two installation plates 10. An air injection pipe 13 is provided at the end of the extension column 12. A first air pump 14 is fixedly installed on the side of the installation plate 10 away from the extension column 12. The first air pump 14 is hermetically connected to the air injection pipe 13 through a conduit. A pressure sensor 15 is fixedly embedded on one side of the end of the extension column 12. An annular airbag 16 is sleeved on the outer periphery of the end of the extension column 12 near the air injection pipe 13 by gluing. A second air pump 17 is installed on the outer side of the installation plate 10. The second air pump 17 is hermetically connected to the inside of the annular airbag 16 through a conduit.

[0020] Specifically, sliding grooves 3 are opened on both sides of the top of the base 1. A bidirectional screw rod 4 is arranged inside the sliding grooves 3. A driving motor 5 is fixedly installed at one end of the bidirectional screw rod 4. The end of the output shaft of the driving motor 5 is fixedly connected to one end of the bidirectional screw rod 4. Both ends of the outer periphery of the bidirectional screw rod 4 are provided with sliders 8. The slider 8 is of a U-shaped structure. Both ends of the top of the slider 8 pass through the sliding groove 3 and are fixedly connected to the bottom of the moving seat 7. The middle part of the bottom end of the slider 8 is spirally connected to the bidirectional screw rod 4 through an embedded threaded sleeve 9.

[0021] Specifically, a sealing valve 18 is provided at the end of the air injection pipe 13 communicating with the first air pump 14. A sealing valve 18 is also provided in the middle of the conduit provided between the airbag 16 and the second air pump 17.

[0022] Specifically, a bracket 11 is provided below the extension column 12. The bracket 11 is fixedly connected to one side of the installation plate 10 by welding.

[0023] Specifically, a limiting rod 6 is arranged inside the sliding groove 3. Both ends of the limiting rod 6 are fixedly connected to the inner walls of both ends of the sliding groove 3 by welding. Both sides of the bottom end of the slider 8 are sleeved on the outer periphery of the limiting rod 6 and are slidably connected thereto.

[0024] Specifically, a control panel 2 is arranged on one side of the top of the base 1. The control panel 2 is fixedly installed on one side of the top of the base 1 by embedding.

[0025] In this embodiment, during use, the driving motor 5 is utilized to drive the rotation of the bidirectional screw 4, which drives the slider 8, the moving seat 7, the mounting plate 10, and the components at the top of the mounting plate 10 to move towards both ends of the base 1. Then, the extension column 12 is inserted into one end of the circular tube. Next, the driving motor 5 is controlled to rotate in the reverse direction, align the other end of the circular tube with another extension column 12, and insert it into the circular tube. Then, the second air pump 17 is used to inflate the annular airbag 16 on the outer periphery of the extension column 12, causing it to gradually expand. The inflated airbag 16 is used to seal both ends of the circular tube, thereby realizing the function of sealing both ends of the circular tube. Finally, the first air pump 14 is used in cooperation with the injection pipe 13 to inject air into the circular tube. When the air pressure inside the circular tube reaches a certain value, the first air pump 14 is turned off, and the injection pipe 13 is sealed using the sealing valve 18. The pressure sensor 15 is used to monitor the pressure change inside the circular tube, so as to achieve the purpose of checking the airtightness of the circular tube.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test tool for airtightness inspection, comprising a base (1), an extension column (12) and an airbag (16), characterized in that: At both ends of the top of the base (1), movable seats (7) are movably arranged. On the tops of the movable seats (7), mounting plates (10) are fixedly welded. At the top ends of the opposite sides of the two mounting plates (10), extension columns (12) are arranged. At the end of the extension column (12), an air injection pipe (13) is provided. On the side of the mounting plate (10) away from the extension column (12), a first air pump (14) is fixedly installed. The first air pump (14) is hermetically communicated with the air injection pipe (13) through a conduit. On one side of the end of the extension column (12), a pressure sensor (15) is fixedly inlaid. On the outer periphery of the end of the extension column (12) close to the air injection pipe (13), an annular airbag (16) is sleeved by gluing. On the outer side of the mounting plate (10), a second air pump (17) is installed. The second air pump (17) is hermetically communicated with the inside of the annular airbag (16) through a conduit.

2. The test tooling for airtightness inspection according to claim 1, characterized in that: On both sides of the top of the base (1), sliding grooves (3) are opened. Inside the sliding grooves (3), a bidirectional screw rod (4) is arranged. At one end of the bidirectional screw rod (4), a driving motor (5) is fixedly installed. The end of the output shaft of the driving motor (5) is fixedly connected to one end of the bidirectional screw rod (4). At both ends of the outer periphery of the bidirectional screw rod (4), sliding blocks (8) are arranged. The sliding blocks (8) are of U-shaped structure. The two ends of the tops of the sliding blocks (8) pass through the sliding grooves (3) and are fixedly connected to the bottoms of the movable seats (7). The middle of the bottom end of the sliding block (8) is spirally connected to the bidirectional screw rod (4) through an inlaid threaded sleeve (9).

3. The test tooling for airtightness inspection according to claim 1, characterized in that: At the end of the air injection pipe (13) communicated with the first air pump (14), a sealing valve (18) is provided. In the middle of the conduit arranged between the airbag (16) and the second air pump (17), a sealing valve (18) is also provided.

4. The test tooling for airtightness inspection according to claim 1, wherein: Below the extension column (12), a bracket (11) is provided. The bracket (11) is fixedly connected to one side of the mounting plate (10) by welding.

5. The test tooling for airtightness inspection according to claim 2, characterized in that: Inside the sliding groove (3), a limiting rod (6) is arranged. The two ends of the limiting rod (6) are fixedly connected to the inner walls of the two ends of the sliding groove (3) by welding. The two sides of the bottom end of the sliding block (8) are sleeved on the outer periphery of the limiting rod (6) and are slidably connected thereto.

6. The test tooling for airtightness inspection according to claim 1, characterized in that: On one side of the top of the base (1), a control panel (2) is provided. The control panel (2) is fixedly installed on one side of the top of the base (1) by inlaying.

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