Railway vehicle air supply pipeline telescopic pipe anti-loose butt joint device

Abstract

The invention discloses a railway vehicle air supply pipeline telescopic pipe anti-loosening butt joint device which comprises a movable joint, an external thread joint and a locking nut, the side, provided with external threads, of the external thread joint abuts against the side, provided with a boss, of the movable joint, and an internal thread joint is arranged on the other side of the external thread joint; a telescopic pipe is fixedly connected between the external thread connector and the internal thread connector, cambered surface grooves are symmetrically formed in the positions, at external threads, of the external thread connector, locking threads are arranged between the external thread connector and the movable connector, and thread shifting blocks matched with the external threads are arranged on the locking threads and correspond to the cambered surface grooves. And the end part of the locking nut buckles the boss and is in threaded connection with the external thread joint. The invention aims to provide the anti-loose butt joint device for 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] The present invention relates to the technical field of railway pipeline docking, and particularly to a loosening-preventing docking device for the telescopic pipe of the air supply pipeline of a rail vehicle. Background Art

[0002] In order to solve the safety problem of the pipeline connection of the railway passenger car braking system, various technical solutions have been proposed in the same industry. However, during the operation of the train, there will inevitably be problems such as loosening of threaded pipe fittings and thermal deformation affecting the driving safety. Conventional threaded pipe fittings will malfunction when encountering thermal deformation and buffer hard links. Therefore, there is an urgent need for a loosening-preventing docking device for the air supply pipeline that has a tight connection and can avoid the torsional deformation and fracture caused by thermal deformation and buffer hard links. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and aims to provide a loosening-preventing docking device for the air supply pipeline that has a tight connection and can avoid the torsional deformation and fracture caused by thermal deformation and buffer hard links.

[0004] To achieve the above purpose, the technical solution of the present invention is realized as follows:

[0005] A loosening-preventing docking device for the telescopic pipe of the air supply pipeline of a rail vehicle includes a union joint, an external thread joint, and a locking nut. One side of the external thread joint with external threads abuts against one side of the union joint with a boss. The other side of the external thread joint is provided with an internal thread joint. A telescopic pipe is fixedly connected between the external thread joint and the internal thread joint. Arc-shaped grooves are symmetrically arranged at the external threads of the external thread joint. Locking threads are arranged between the external thread joint and the union joint. The thread sliders matching the external threads are arranged at the locking threads corresponding to each arc-shaped groove. The end of the locking nut buckles the boss and is threadedly connected with the external thread joint.

[0006] Further, a boss is arranged at the end of the external thread joint, and an annular groove for the boss to be embedded is arranged in the inner ring of the locking threads.

[0007] Further, an annular recess is arranged at the edge of the inner hole of the external thread joint, and a sealing ring is arranged in the annular recess.

[0008] Further, shoulders are arranged at one end of both the external thread joint and the internal thread joint where they are connected to the telescopic pipe.

[0009] Further, at least four convex circles protruding from the pipe body are arranged in the middle of the telescopic pipe. Inner concave sockets sleeved and welded with the shoulders are arranged on both sides of the telescopic pipe.

[0010] Further, an inner boss is arranged at the edge of the self-locking nut, and the inner boss abuts against the boss.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention can simultaneously solve the problems of threaded pipe loosening, thermal deformation, buffering hard link, and anti-fracture during train operation. The connection between the locking nut, the flexible joint, and the external threaded joint is convenient for screwing and separating the air supply pipelines between carriages, and the locking screw thread squeezed by the locking nut will cause the screw thread block to deform and no longer match the external thread of the external threaded joint, so that a self-locking structure is formed between the locking nut and the external threaded joint, and the connection is tight and reliable, and the threaded pipe is not easy to loosen. The telescopic tube is connected between the external threaded joint and the internal threaded joint. When the device as a whole is affected by the air supply pipeline and produces thermal deformation, the telescopic tube can play a compensating role between the external threaded joint and the internal threaded joint. Since the telescopic tube is welded on the threaded joint and the internal threaded joint, it not only solves the problems of thermal expansion and contraction and torsional deformation, but also solves the problem of fracture affected by vibration frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 for Figure 1 A cross-sectional view of

[0015] Figure 3 An exploded view of the present invention;

[0016] Figure 4 It is a schematic structural diagram of the external threaded joint in the present invention;

[0017] Figure 5 It is a structural schematic diagram of the telescopic tube in the present invention;

[0018] Figure 6 It is a structural schematic diagram of the internal thread joint in the present invention;

[0019] Figure 7 It is a structural schematic diagram of the locking screw in the present invention;

[0020] Figure 8 It is a structural schematic diagram of the movable joint in the present invention;

[0021] Figure 9 It is a structural schematic diagram of the locking nut in the present invention.

[0022] Description of reference numerals:

[0023] 1 - External thread joint, 2 - Telescopic pipe, 3 - Internal thread joint, 4 - Locking thread, 5 - Sealing ring, 6 - Union joint, 7 - Locking nut, 9 - Arc-shaped groove, 10 - Boss, 11 - Annular recess, 12 - Shoulder, 13 - Convex circle, 14 - Internal recess, 15 - Thread block, 16 - Annular groove, 17 - Boss, 18 - Nut, 19 - Internal boss. Detailed implementation mode

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] As Figures 1 to 9 shown, a telescopic pipe anti-loosening docking device for the air supply pipeline of a rail vehicle includes a union joint 6, an external thread joint 1 and a locking nut 7. One side of the external thread joint 1 with external threads abuts against one side of the union joint 6 with a boss 17. The other side of the external thread joint 1 is provided with an internal thread joint 3. A telescopic pipe 2 is fixedly connected between the external thread joint 1 and the internal thread joint 3. Arc-shaped grooves 9 are symmetrically arranged at the external threads of the external thread joint 1. A locking thread 4 is arranged between the external thread joint 1 and the union joint 6. The locking thread 4 is provided with thread blocks 15 corresponding to each arc-shaped groove 9 and matching the external threads. The end of the locking nut 7 buckles the boss 17 and is threadedly connected to the external thread joint 1.

[0026] Wherein, a boss 10 is arranged at the end of the external thread joint 1. The inner ring of the locking thread 4 has an annular groove 16 into which the boss 10 can be inserted. The annular groove 16 is used for sleeving the locking thread 4 to maintain the central positioning of the locking thread 4.

[0027] Wherein, an annular recess 11 is arranged at the edge of the inner hole of the external thread joint 1. A sealing ring 5 is arranged in the annular recess 11 for sealing the docking surface between the external thread joint 1 and the union joint 6.

[0028] Wherein, an internal boss 19 is arranged at the edge of the self-locking nut 7. The internal boss 19 abuts against the boss 17. After the locking nut 7 passes through the nut 18 of the union joint 6 and is connected to the external thread joint 1, the internal boss 19 pushes the boss 17 forward. The locking thread 4 is squeezed by the boss 17, causing the thread blocks 15 to further elastically deform, so that the external threads of the external thread joint 1 do not match the thread blocks 15, restricting the loosening between the locking nut 7 and the external thread joint 1 and playing a self-locking role. At the same time, the sealing ring 5 is synchronously squeezed to seal the docking surface between the external thread joint 1 and the union joint 6, thus synchronously implementing self-locking to prevent the problem of loosening or leakage of the pipeline connection.

[0029] Wherein, shoulders 12 are provided at one ends of the external thread joint 1 and the internal thread joint 3 that are connected to the telescopic pipe 2. At least four convex circles 13 protruding from the pipe body are provided in the middle of the telescopic pipe 2, and concave sockets 14 that are sleeved and welded with the shoulders 12 are provided on both sides of the telescopic pipe 2. The telescopic pipe 2 is connected between the external thread joint 1 and the internal thread joint 3. When the whole device is affected by the air supply pipeline and generates thermal deformation, the telescopic pipe 2 can play a compensation role between the external thread joint 1 and the internal thread joint 3. Since the telescopic pipe 2 is sleeved on the external thread joint 1 and the internal thread joint 3 and welded, and the telescopic pipe 2 is provided with convex circles 13, when thermal expansion and contraction and torsional deformation occur, the convex circles 13 can play a compensation role and prevent fracture due to vibration frequency.

[0030] This docking device can buffer and offset the hard connection between air supply pipelines and the vibration generated during the train operation. It solves the safety hazards of gas leakage caused by the influence or fracture of thermal and cold deformation and torsional deformation, ensures the safety performance of the braking system for controlling the train operation, enables the whole device to solve problems such as loosening of threaded pipe fittings, thermal deformation, buffering of hard connections, and fracture at the same time, so as to ensure the firm connection and sealing performance.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A loosening prevention docking device for the telescopic pipe of the air supply pipeline of an orbital vehicle, comprising a union joint (6), an external thread joint (1) and a locking nut (7), characterized in that: The side of the external thread joint (1) with external threads abuts against the side of the union joint (6) with a boss (17). The other side of the external thread joint (1) is provided with an internal thread joint (3). A telescopic pipe (2) is fixedly connected between the external thread joint (1) and the internal thread joint (3). Arc-shaped grooves (9) are symmetrically arranged at the external threads of the external thread joint (1). A locking thread (4) is arranged between the external thread joint (1) and the union joint (6). The locking thread (4) is provided with thread shifting blocks (15) matching the external threads corresponding to each arc-shaped groove (9). The end of the locking nut (7) buckles the boss (17) and is threadedly connected with the external thread joint (1).

2. The anti-loosening docking device for the telescopic pipe of the air supply pipeline of the rail vehicle according to claim 1, wherein: A boss (10) is arranged at the end of the external thread joint (1). An annular groove (16) capable of allowing the boss (10) to be embedded is provided in the inner ring of the locking thread (4).

3. The anti-loosening docking device for the telescopic pipe of the air supply pipeline of the rail vehicle according to claim 2, characterized in that: An annular recess (11) is arranged at the edge of the inner hole of the external thread joint (1). A sealing ring (5) is arranged in the annular recess (11).

4. A telescopic pipe anti-loosening docking device for the air supply pipeline of a rail vehicle according to claim 1, characterized in that: Both the external thread joint (1) and the internal thread joint (1) are provided with shoulders (12) at the ends connected to the telescopic pipe (2).

5. The anti-loosening docking device for the telescopic pipe of the air supply pipeline of a rail vehicle according to claim 4, characterized in that: At least four convex circles (13) protruding from the pipe body are arranged in the middle of the telescopic pipe (2). Concave sockets (14) sleeved and welded with the shoulders (12) are arranged on both sides of the telescopic pipe (2).

6. The anti-loosening docking device for the telescopic pipe of the air supply pipeline of a rail vehicle according to claim 1, characterized in that: An inner boss (19) is arranged at the edge of the self-locking nut (7). The inner boss (19) abuts against the boss (17).

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