Butt-joint self-locking anti-loosening union for air supply pipeline of railway vehicle

Abstract

The utility model discloses a railway vehicle air supply pipeline butt joint self-locking anti-loosening union which comprises a self-locking nut, an external thread connector and a movable connector, the side, provided with external threads, of the external thread connector abuts against the side, provided with a first boss, of the movable connector, and cambered surface grooves are symmetrically formed in the positions, provided with the external threads, of the external thread connector. A self-locking thread ring is arranged between the external thread connector and the movable connector, the self-locking thread ring is provided with thread shifting blocks matched with the external threads corresponding to the cambered surface grooves, and the end of the self-locking nut buckles the first boss and is in threaded connection with the external thread connector. The utility model aims to provide the anti-loosening union for the telescopic pipe of the air supply pipeline, which is tight in connection and can avoid distortion and breakage caused by thermal deformation and buffer hard links.

Description

Technical Field

[0001] This utility model relates to the field of railway pipeline connection technology, and in particular to a self-locking and anti-loosening mechanism for connecting air supply pipelines of rail vehicles. Background Technology

[0002] To address the safety issues of pipeline connections in railway passenger car braking systems, various technical solutions have been proposed within the industry. However, during train operation, issues such as loosening of threaded pipes and thermal deformation inevitably arise, affecting train safety. Conventional threaded pipes are prone to failure when subjected to thermal deformation and hard-connected buffers. Therefore, there is an urgent need for a tight-fitting, leak-proof oil sealant for air supply pipeline expansion joints that can prevent twisting, deformation, and breakage caused by thermal deformation and hard-connected buffers. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and to provide a tight-fitting air supply pipe expansion joint that can avoid thermal deformation and buffer hard links that cause twisting deformation and breakage.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A self-locking anti-loosening device for connecting air supply pipes in rail vehicles includes a self-locking nut, an external threaded connector, and a union connector. The external threaded connector has an external thread side that abuts against the union connector with a first boss side. The external threaded connector has symmetrical arc-shaped grooves at the external thread. A self-locking threaded ring is provided between the external threaded connector and the union connector. The self-locking threaded ring has threaded blocks that match the external thread for each arc-shaped groove. The end of the self-locking nut engages with the first boss and is threadedly connected to the external threaded connector. The end of the external threaded connector has a second boss. The inner ring of the self-locking threaded ring has an annular groove that allows the second boss to be inserted. The edge of the self-locking nut has an inner boss that abuts against the first boss.

[0006] Furthermore, the inner edge of the external threaded connector is provided with an annular recess, and a sealing ring is provided inside the annular recess.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] This invention can simultaneously solve the problems of loosening, thermal deformation, and leakage of threaded pipe fittings during train operation. After the self-locking nut is connected to the external threaded joint, the self-locking thread ring is compressed by the engagement pressure of the self-locking nut and the union, causing the threaded block to undergo further elastic deformation, thus restricting the loosening of the self-locking nut and the external threaded joint and achieving a self-locking effect. At the same time, the sealing ring is also compressed, sealing the mating surfaces of the external threaded joint and the union, thereby simultaneously implementing self-locking to prevent the pipeline connection from becoming loose or leaking. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a cross-sectional view of the present invention;

[0011] Figure 3 This is an exploded view of the present invention;

[0012] Figure 4 This is a schematic diagram of the external threaded connector in this utility model;

[0013] Figure 5 This is a schematic diagram of the structure of the self-locking threaded ring in this utility model;

[0014] Figure 6 This is a schematic diagram of the structure of the live joint in this utility model;

[0015] Figure 7 This is a schematic diagram of the self-locking nut in this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1-External threaded connector, 2-Self-locking threaded ring, 3-Sealing ring, 4-Joint, 5-Self-locking nut, 6-Arc groove, 7-First boss, 8-Annular recess, 9-Threaded puller, 10-Annular groove, 11-Second boss, 12-Inner boss. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 7 As shown, a self-locking anti-loosening device for connecting air supply pipes of rail vehicles includes a self-locking nut 5, an external threaded connector 1, and a union connector 4. The side of the external threaded connector 1 with external threads abuts against the side of the union connector 4 with a first boss 7. The external threaded connector 1 has symmetrical arc-shaped grooves 6 at the external threads. A self-locking threaded ring 2 is provided between the external threaded connector 1 and the union connector 4. The self-locking threaded ring 2 has threaded blocks 9 that match the external threads for each arc-shaped groove 6. The end of the self-locking nut 5 is engaged with the first boss 7 and threadedly connected to the external threaded connector 1.

[0020] The external threaded connector 1 has a second boss 11 at its end, and the inner ring of the self-locking threaded ring 2 has an annular groove 10 that allows the second boss 11 to be inserted. The annular groove 10 is used to fit the self-locking threaded ring 2 to maintain its central positioning.

[0021] The inner edge of the external threaded connector 1 is provided with an annular recess 8, and a sealing ring 3 is provided in the annular recess 8 for sealing the mating surface of the external threaded connector 1 and the live connector 4.

[0022] The self-locking nut 5 has an inner boss 12 on its edge, which abuts against the first boss 7. After the self-locking nut 5 is connected to the external threaded connector 1, the inner boss 12 pushes the first boss 7 forward. The self-locking threaded ring 2 is squeezed by the first boss 7, causing the threaded puller 9 to undergo further elastic deformation, making it impossible for the external thread of the external threaded connector 1 to match the threaded puller 9. This restricts the loosening of the self-locking nut 5 and the external threaded connector 1, thus achieving a self-locking effect. At the same time, the sealing ring 3 is simultaneously squeezed, sealing the mating surfaces of the external threaded connector 1 and the union 4, thereby simultaneously implementing self-locking to prevent the pipeline connection from becoming loose or leaking.

[0023] This invention can buffer and offset the hard connection between air supply pipelines and the vibration generated during train operation, solving the safety hazard of leakage of the circulating medium in the pipeline caused by the influence or breakage of cold and heat deformation and torsional deformation, so as to ensure the safe performance of the braking system in controlling the train.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking anti-loosening connector for air supply pipelines of rail vehicles, comprising a self-locking nut (5), an external threaded connector (1), and a union connector (4), characterized in that: The external threaded connector (1) has an external thread on one side that abuts against the side of the union (4) with the first boss (7). The external threaded connector (1) has symmetrical arc-shaped grooves (6) at the external thread. A self-locking threaded ring (2) is provided between the external threaded connector (1) and the union (4). The self-locking threaded ring (2) has threaded blocks (9) that match the external thread for each arc-shaped groove (6). The end of the self-locking nut (5) is fastened to the first boss (7) and threadedly connected to the external threaded connector (1). The end of the external threaded connector (1) has a second boss (11). The inner ring of the self-locking threaded ring (2) has an annular groove (10) that allows the second boss (11) to be inserted. The edge of the self-locking nut (5) has an inner boss (12) that abuts against the first boss (7).

2. The self-locking anti-loosening device for connecting air supply pipelines of rail vehicles according to claim 1, characterized in that: The inner hole edge of the external threaded connector (1) is provided with an annular recess (8), and a sealing ring (3) is provided in the annular recess (8).

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