CN-121977117-A - Sealing anti-loose movable joint of air supply pipeline of railway vehicle

Abstract

The invention provides a sealing anti-loosening movable joint of an air supply pipeline of a railway vehicle, and belongs to the technical field of railway pipeline butt joint. It has solved the current problem that easily becomes flexible because of vibrations of connecting. The invention discloses a sealing anti-loosening movable joint for an air supply pipeline of a railway vehicle, which comprises an external threaded joint, wherein the external wall of the external threaded joint is provided with a connecting thread A and a connecting thread B, the pitch of the connecting thread A is larger than that of the connecting thread B, the rotating direction of the connecting thread A and the rotating direction of the connecting thread B are opposite, the inner wall of a connecting compression nut is provided with an internal connecting thread, a limiting ring is in interference with one side of a limiting boss B, the internal connecting thread is in interference with the connecting thread A, the external wall of a hollow screw is provided with an external connecting thread, the external connecting thread is in interference with the connecting thread B, one side of the hollow screw is in interference with the external threaded joint, and the inner wall of a cap is provided with an internal connecting thread, and an O-shaped ring is arranged between the external threaded joint and the movable joint.

Inventors

• XU XIANG

Assignees

• 四川辉鸿轨道交通科技有限公司

Dates

Publication Date

20260505

Application Date

20260331

Claims (3)

1. 1. A sealing anti-loose joint (1) of a rail vehicle air supply pipeline, which is characterized by comprising; The external threaded joint (4), the external wall of the external threaded joint (4) is provided with a connecting thread A (11) and a connecting thread B (12), the pitch of the connecting thread A (11) is larger than that of the connecting thread B (12), the rotating directions of the connecting thread A (11) and the connecting thread B (12) are opposite, and the end part of the external threaded joint (4) is provided with a limiting boss A (10); the movable joint (1), the end of the movable joint (1) is provided with a limit boss B (9); The connecting compression nut (2), the inner wall of the connecting compression nut (2) is provided with an inner connecting thread (8), the end part of the connecting compression nut (2) is provided with a limiting ring (7) protruding inwards, the limiting ring (7) is abutted against one side of a limiting boss B (9), the inner connecting thread (8) is meshed with a connecting thread A (11), and a limiting boss A (10) is abutted against the limiting boss B (9); The hollow screw (16), the outer wall of the hollow screw (16) is provided with an external connecting thread (13), the external connecting thread (13) is meshed with the connecting thread B (12), and one side of the hollow screw (16) is abutted against the external threaded joint (4); the connecting cap (15) is provided with an internal thread (14) on the inner wall of the connecting cap (15), the internal thread (14) is meshed with the connecting thread B (12), and one side of the connecting cap (15) is abutted against the hollow screw (16); And the O-shaped ring (6) is arranged between the external threaded joint (4) and the movable joint (1).
2. 2. The sealing and anti-loosening movable joint (1) of the air supply pipeline of the railway vehicle according to claim 1 is characterized in that the outer walls of the external threaded joint (4), the movable joint (1), the connecting compression nut (2), the hollow screw (16) and the parallel cap (15) are respectively provided with a hexagonal part (3).
3. 3. The sealing and anti-loosening movable joint (1) of the air supply pipeline of the railway vehicle according to claim 1 is characterized in that connecting pipe threads (5) are arranged on the inner walls of the external threaded joint (4) and the movable joint (1).

Description

Sealing anti-loose movable joint of air supply pipeline of railway vehicle Technical Field The invention belongs to the technical field of railway pipeline butt joint, relates to a pipeline sealing anti-loosening movable joint, and in particular relates to a railway vehicle air supply pipeline sealing anti-loosening movable joint. Background The air supply pipeline joint of the railway vehicle is a core component for connecting key air circuit elements such as a brake system, an air spring and the like, and the core mission of the air supply pipeline joint is to ensure reliable sealing and firm connection of compressed air under continuous vibration and pressure fluctuation. Such joints are typically made of metal (e.g., stainless steel, brass) to ensure strength and incorporate an aging-resistant, weather-resistant elastomeric seal (e.g., O-ring) to achieve static or dynamic sealing. Traditional screenshot adopts single threaded connection, and can produce jolting and the like in the vehicle driving process and can lead to threaded connection to become flexible, in order to reduce the screw loosening, can set up the structure and slow down the screw loosening. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a multi-threaded connection anti-loosening movable joint for a rail vehicle air supply pipeline seal. The invention aims at realizing the technical scheme that the sealing anti-loosening movable joint of the air supply pipeline of the railway vehicle is characterized by comprising the following components; The external threaded connector is characterized in that a connecting thread A and a connecting thread B are arranged on the outer wall of the external threaded connector, the pitch of the connecting thread A is larger than that of the connecting thread B, the rotating direction of the connecting thread A and the rotating direction of the connecting thread B are opposite, and a limiting boss A is arranged at the end part of the external threaded connector 4; The end part of the movable joint is provided with a limiting boss B; the connecting compression nut is characterized in that an inner connecting thread is arranged on the inner wall of the connecting compression nut, an inwards protruding limiting ring is arranged at the end part of the connecting compression nut, the limiting ring is abutted against one side of a limiting boss B, the inner connecting thread is engaged with a connecting thread A, and the limiting boss A is abutted against the limiting boss B; The hollow screw is provided with an external connecting thread on the outer wall, the external connecting thread is meshed with the connecting thread B, and one side of the hollow screw is abutted against the external threaded joint; The inner wall of the cap is provided with an internal thread which is meshed with the connecting thread B, and one side of the cap is abutted against the hollow screw; and the O-shaped ring is arranged between the external threaded joint and the movable joint. In the sealing anti-loosening movable joint of the air supply pipeline of the railway vehicle, the outer threaded joint, the movable joint, the connecting compression nut, the hollow screw and the outer wall of the parallel cap are all provided with hexagonal parts. In the sealing anti-loosening movable joint of the air supply pipeline of the railway vehicle, the external threaded joint and the inner wall of the movable joint are provided with connecting pipe threads. Compared with the prior art, the anti-loosening movable joint for the air supply pipeline seal of the railway vehicle has the advantages that the anti-loosening effect is improved through the connection of multiple groups of threads, and when the pump joint is vibrated due to the fact that threads with different pitches are screwed, the threads are mutually restrained through different anti-loosening effects, so that further anti-loosening is realized. Drawings Fig. 1 is a schematic structural view of an assembled sealing loose joint of an air supply pipeline of a railway vehicle. Fig. 2 is a schematic diagram of the sealing loose joint half-section structure of the air supply pipeline of the railway vehicle. Fig. 3 is a schematic structural view of an explosion diagram of the sealing anti-loose joint of the air supply pipeline of the railway vehicle. In the figure, 1, a movable joint, 2, a connecting compression nut, 3, a hexagonal part, 4, an external thread joint, 5, a connecting pipe thread, 6, an O-shaped ring, 7, a limiting ring, 8, an internal thread, 9, a limiting boss B, 10, a limiting boss A, 11, a connecting thread A, 12, a connecting thread B, 13, an external connecting thread, 14, an internal thread, 15, a cap and 16 and a hollow screw. Detailed Description The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying