Aluminum casting air tightness leak detection equipment

Abstract

The utility model discloses aluminum casting air tightness leak detection equipment, which comprises a detection table, an air pump is arranged below the detection table, an air nozzle is fixed on the surface of the detection table, the air pump is communicated with the air nozzle, a first rubber pad is arranged on the surface of the detection table, a round frame is arranged on the outer side of the first rubber pad, and the round frame is arranged on the outer side of the first rubber pad. A barometer is installed on the surface of the round frame, and a sealing cover is arranged on the inner side of the round frame. According to the aluminum casting airtightness leak detection equipment, an aluminum casting is placed in a round frame, an opening in the lower end face of the aluminum casting is attached to a first rubber pad, an adjusting rod is screwed, the adjusting rod pushes an extension rod to extend out of a mounting sleeve through threads, and the extension rod pushes a sealing cover to press downwards until a second rubber pad on the surface of the sealing cover is tightly attached to the opening in the upper end face of the aluminum casting; the air pump is started to inject air into the aluminum casting through the air tap, then the barometer on the round frame is observed, and when the numerical value of the barometer changes, it shows that the air in the aluminum casting leaks outwards, and the air tightness is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of aluminum casting leak detection technology, specifically to an aluminum casting airtightness leak detection device. Background Technology

[0002] Aluminum alloy die castings are widely used in various industrial products. If the die casting operation is improper, it will cause defects such as cracks, porosity, voids, slag holes, and sand holes in the aluminum castings, thus compromising their airtightness. Therefore, airtightness testing is required after aluminum castings are produced.

[0003] Previously, it was necessary to fasten the two aluminum castings together, pressurize them with high-pressure gas, and then place them in water to observe for bubbles to determine the airtightness. However, this process required assembly and disassembly, which was time-consuming. Another method involved using other structures to form a sealed chamber around the aluminum castings and then introducing high-pressure gas to observe whether the pressure could be maintained. This method required a pressure mechanism to hold the aluminum castings in place, which could easily damage them, and leaks could even be caused by downward pressure, thus having certain limitations. To address these issues, an innovative design was developed based on the existing leak detection equipment. Utility Model Content

[0004] The purpose of this invention is to provide an airtightness testing device for aluminum castings to solve the technical problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an aluminum casting airtightness leak testing device, comprising a testing platform, an air pump installed below the testing platform, an air nozzle fixed on the surface of the testing platform, the air pump and the air nozzle being interconnected, a first rubber pad provided on the surface of the testing platform, a circular frame provided on the outer side of the first rubber pad, a pressure gauge installed on the surface of the circular frame, a cover provided on the inner side of the circular frame, a second rubber pad fixed on the lower surface of the cover, an aluminum casting disposed between the cover and the testing platform, an extension rod fixed on the upper surface of the cover, an installation sleeve provided on the outer side of the extension rod, a crossbeam installed on the end of the installation sleeve away from the extension rod, an adjusting rod installed on the crossbeam, and the adjusting rod being interconnected with the extension rod.

[0006] Preferably, a guide rail is fixed on the inner wall of the circular frame, and a guide groove is provided on the edge of the cover, with the guide rail located in the guide groove.

[0007] Preferably, a sealing ring is provided between the cap and the circular frame.

[0008] Preferably, the second rubber pad and the first rubber pad are respectively fitted to the opening on the upper end face and the opening on the lower end face of the aluminum casting.

[0009] Preferably, the extension rod and the mounting sleeve form a telescopic structure.

[0010] Preferably, a limiting rod is fixed to the surface of the extension rod, and a limiting groove is formed on the inner wall of the mounting sleeve, with the limiting rod located in the limiting groove.

[0011] Preferably, the extension rod has a mating groove, and the adjusting rod is threadedly connected to the extension rod through the mating groove.

[0012] Preferably, the adjusting rod and the crossbeam are connected by a through-type rotating connection.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The aluminum casting airtightness leak testing device places the aluminum casting in a circular frame, with its lower end opening fitting against the first rubber pad. Turning the adjusting rod pushes the extension rod out of the mounting sleeve through the thread, and the extension rod pushes the cover down until the second rubber pad on the surface of the cover fits tightly against the upper end opening of the aluminum casting. The air pump is started to inject air into the aluminum casting through the air nozzle, and then the air pressure gauge on the circular frame is observed. When the air pressure gauge reading changes, it indicates that the air inside the aluminum casting is leaking out and the airtightness is insufficient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a cross-sectional view of the connection structure of the mounting sleeve and extension rod of this utility model;

[0016] Figure 3 This is a top-section schematic diagram of the connection structure between the mounting sleeve and the extension rod of this utility model;

[0017] Figure 4 This is a top-section sectional view of the installation structure of the cover of this utility model;

[0018] Figure 5 This utility model Figure 4 A magnified structural diagram at point A in the diagram.

[0019] In the diagram: 1. Testing platform; 2. Air pump; 3. Air nozzle; 4. First rubber pad; 5. Circular frame; 6. Pressure gauge; 7. Guide rail; 8. Cover; 9. Guide groove; 10. Sealing ring; 11. Second rubber pad; 12. Aluminum casting; 13. Extension rod; 14. Connecting groove; 15. Mounting sleeve; 16. Crossbeam; 17. Adjusting rod; 18. Limiting rod; 19. Limiting groove. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-5 This utility model provides a technical solution: an aluminum casting airtightness leak testing device, including a testing platform 1, an air pump 2 installed below the testing platform 1, an air nozzle 3 fixed on the surface of the testing platform 1, the air pump 2 and the air nozzle 3 being interconnected, a first rubber pad 4 provided on the surface of the testing platform 1, a circular frame 5 provided on the outer side of the first rubber pad 4, a pressure gauge 6 installed on the surface of the circular frame 5, a cover 8 provided on the inner side of the circular frame 5, a second rubber pad 11 fixed on the lower surface of the cover 8, an aluminum casting 12 provided between the cover 8 and the testing platform 1, an extension rod 13 fixed on the upper surface of the cover 8, an installation sleeve 15 provided on the outer side of the extension rod 13, a crossbeam 16 installed at the end of the installation sleeve 15 away from the extension rod 13, an adjusting rod 17 installed on the crossbeam 16, and the adjusting rod 17 being interconnected with the extension rod 13.

[0022] A guide rail 7 is fixed on the inner wall of the circular frame 5, and a guide groove 9 is provided on the edge of the cover 8. The guide rail 7 is located in the guide groove 9, which facilitates the cooperation between the guide rail 7 and the guide groove 9, restricts the rotation of the cover 8, and facilitates the vertical displacement of the cover 8.

[0023] A sealing ring 10 is provided between the cover 8 and the round frame 5, which improves the sealing performance between the cover 8 and the round frame 5.

[0024] The second rubber pad 11 and the first rubber pad 4 are respectively fitted to the upper end face opening and the lower end face opening of the aluminum casting 12, which can keep the aluminum casting 12 in a sealed environment, making it convenient to inject air into the aluminum casting 12 for subsequent testing.

[0025] The extension rod 13 and the mounting sleeve 15 form a telescopic structure. A limiting rod 18 is fixed on the surface of the extension rod 13. A limiting groove 19 is opened on the inner wall of the mounting sleeve 15. The limiting rod 18 is located in the limiting groove 19. The limiting rod 18 and the limiting groove 19 cooperate with each other, which helps to improve the stability of the extension rod 13 in telescopic adjustment within the mounting sleeve 15.

[0026] The extension rod 13 has a mating groove 14. The adjusting rod 17 is threadedly connected to the extension rod 13 through the mating groove 14. The adjusting rod 17 and the crossbeam 16 are connected by a through-type rotating connection. When the adjusting rod 17 is turned to rotate on the crossbeam 16, the adjusting rod 17 can push the extension rod 13 to extend and retract within the mounting sleeve 15 through the thread.

[0027] Working principle: According to Figures 1-5 As shown, first, the aluminum casting 12 is placed inside the circular frame 5, so that the lower end opening of the aluminum casting 12 covers the air nozzle 3, and the lower end opening of the aluminum casting 12 is attached to the first rubber pad 4. Then, the adjusting rod 17 is rotated on the crossbeam 16. The rotating adjusting rod 17 pushes the extension rod 13 out of the mounting sleeve 15 through the thread. The extension rod 13 extends downward into the mounting sleeve 15 with the cooperation of the limiting rod 18 and the limiting groove 19. At this time, the extension rod 13 pushes the cover 8 down. The process continues until the second rubber pad 11 on the surface of the cover 8 is tightly fitted to the opening on the upper end face of the aluminum casting 12. At this point, the upper and lower openings of the aluminum casting 12 are sealed by the second rubber pad 11 and the first rubber pad 4, respectively. Then, the air pump 2 is started to inject air into the aluminum casting 12 through the air nozzle 3. Then, the air pressure gauge 6 on the circular frame 5 is observed. When the value of the air pressure gauge 6 changes, it indicates that the air inside the aluminum casting 12 has leaked into the circular frame 5, which means that the air tightness of the aluminum casting 12 is insufficient.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak testing device for aluminum castings, comprising a testing platform (1), characterized in that: An air pump (2) is installed below the testing platform (1). An air nozzle (3) is fixed on the surface of the testing platform (1). The air pump (2) and the air nozzle (3) are connected to each other. A first rubber pad (4) is provided on the surface of the testing platform (1). A circular frame (5) is provided on the outside of the first rubber pad (4). A pressure gauge (6) is installed on the surface of the circular frame (5). A cover (8) is provided on the inside of the circular frame (5). A second rubber pad (11) is fixed on the lower surface of the cover (8). An aluminum casting (12) is provided between the cover (8) and the testing platform (1). An extension rod (13) is fixed on the upper surface of the cover (8). An installation sleeve (15) is provided on the outside of the extension rod (13). A crossbeam (16) is installed on the end of the installation sleeve (15) away from the extension rod (13). An adjusting rod (17) is installed on the crossbeam (16). The adjusting rod (17) is connected to the extension rod (13).

2. The leak testing device for aluminum castings according to claim 1, characterized in that: A guide rail (7) is fixed on the inner wall of the circular frame (5), and a guide groove (9) is provided on the edge of the cover (8), with the guide rail (7) located in the guide groove (9).

3. The airtightness testing device for aluminum castings according to claim 1, characterized in that: A sealing ring (10) is provided between the cover (8) and the circular frame (5).

4. The airtightness testing device for aluminum castings according to claim 1, characterized in that: The second rubber pad (11) and the first rubber pad (4) are respectively attached to the upper end face opening and the lower end face opening of the aluminum casting (12).

5. The airtightness testing device for aluminum castings according to claim 1, characterized in that: The extension rod (13) and the mounting sleeve (15) form a telescopic structure.

6. The airtightness testing device for aluminum castings according to claim 1, characterized in that: A limiting rod (18) is fixed to the surface of the extension rod (13), and a limiting groove (19) is opened on the inner wall of the mounting sleeve (15), with the limiting rod (18) located in the limiting groove (19).

7. The leak testing device for aluminum castings according to claim 1, characterized in that: The extension rod (13) has a mating groove (14) inside, and the adjusting rod (17) is threadedly connected to the extension rod (13) through the mating groove (14).

8. The airtightness testing device for aluminum castings according to claim 1, characterized in that: The adjusting rod (17) and the crossbeam (16) are connected by a through-type rotating connection.

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