Rail transit pipe joint

Abstract

The utility model discloses a rail transit pipe joint which comprises a pipeline joint body, an external thread ring is arranged on the outer wall of the upper portion of the pipeline joint body, and a limiting blocking piece is fixedly installed on the outer wall of the middle of the pipeline joint body. And the limiting blocking piece comprises a limiting check ring, a first mounting hole, a semicircular head, an annular groove, a first compression spring, an annular plate, a second mounting hole and a second compression spring, a mounting flange plate is fixedly mounted on the outer wall of the lower end of the limiting check ring, and a fixing bolt is mounted in the mounting flange plate. According to the rail transit pipe joint, after threaded connection, the first compression spring and the second compression spring are extruded, continuous pressing force can be provided, threaded connection is tighter, looseness caused by vibration or external force is effectively prevented, and the service life of the rail transit pipe joint is prolonged. And tiny gaps generated due to thermal expansion and cold contraction of materials or long-term load action can be compensated, so that the connection stability is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit hardware, in particular to a rail transit pipe joint. Background Art

[0002] In the existing technology, in the field of rail transit, threaded connectors are widely used. The connection is achieved through the mutual engagement of internal and external threads. The structure is relatively simple and easy to process and manufacture. When the pipeline needs to be disassembled or replaced, the threaded connection can be easily separated by rotation, which improves the convenience of maintenance.

[0003] However, in the prior art, after pipe joints are threaded together, complex loads such as variable loads, impact, vibration, and ambient temperature changes in application environments such as rail vehicles can destroy the self-locking conditions of the threaded connection, causing the nut to loosen and rotate, gradually reducing or even eliminating the preload force, and ultimately causing the threaded connection to fail.

[0004] To this end, we propose a rail transit pipe joint. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a rail transit pipe joint that can provide continuous compression force to make the threaded connection tighter, effectively prevent loosening caused by vibration or external force, and compensate for the tiny gaps caused by thermal expansion and contraction of the material or long-term load, thereby maintaining the stability of the connection, which can effectively solve the problems in the background technology.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a rail transit pipe joint, including a pipe joint, the outer wall of the upper part of the pipe joint is provided with an external threaded ring, and the outer wall of the middle part of the pipe joint is fixedly installed with a limit stopper, and the limit stopper includes a limit stopper ring, a first mounting hole, a semicircular head, an annular groove, a first compression spring, an annular plate, a second mounting hole and a second compression spring, and the outer wall of the lower end of the limit stopper ring is fixedly installed with a mounting flange, and a fixing bolt is installed in the mounting flange.

[0009] Preferably, the limit retaining ring is fixed to the outer wall of the middle part of the pipe joint, the annular groove is opened inside the limit retaining ring, the first mounting hole is opened on the upper end outer surface of the limit retaining ring, and the lower end of the first mounting hole is connected to the annular groove.

[0010] Preferably, the first compression spring and the annular plate are both located in the annular groove, and the outer wall of the annular plate is in sliding connection with the annular groove.

[0011] Preferably, the first compression spring is fixedly installed between the lower outer surface of the annular plate and the bottom of the annular groove, and the lower outer surface of the annular plate is elastically connected to the bottom of the annular groove through the first compression spring.

[0012] Preferably, the second mounting hole is opened on the upper outer surface of the annular plate, and the second compression spring is located in the second mounting hole, the lower outer surface of the second compression spring is fixedly connected to the bottom of the second mounting hole, and the upper outer surface of the second compression spring is fixedly connected to the lower outer surface of the semicircular head.

[0013] Preferably, the outer wall of the semicircular head is slidably connected to the first mounting hole, and the outer surface of the lower end of the semicircular head is elastically connected to the bottom of the second mounting hole via a second compression spring.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a rail transit pipe joint with the following beneficial effects:

[0016] 1. This rail transit pipe joint has a first compression spring and a second compression spring. After the threaded connection, the first compression spring and the second compression spring are both squeezed, which can provide continuous compression force, making the threaded connection tighter, effectively preventing loosening due to vibration or external force, and compensating for the tiny gap caused by thermal expansion and contraction of the material or long-term load, thereby maintaining the stability of the connection.

[0017] 2. In this rail transit pipe joint, the elastic characteristics of the spring can absorb and disperse vibration energy, reducing the direct impact of vibration on the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a rail transit pipe joint of the present utility model.

[0019] Figure 2 This is a structural schematic diagram of a limit stopper and a mounting flange in a rail transit pipe joint of the utility model.

[0020] Figure 3 This is a side sectional view of a rail transit pipe joint limit stopper of the utility model.

[0021] Figure 4 This utility model is a rail transit pipe joint Figure 3 A partial enlarged view of .

[0022] In the figure: 1. Pipe joint; 2. External thread ring; 3. Limit stopper; 4. Mounting flange; 5. Fixing bolt; 6. Limit stopper; 7. First mounting hole; 8. Semicircular head; 9. Annular groove; 10. First compression spring; 11. Annular plate; 12. Second mounting hole; 13. Second compression spring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] This embodiment is a rail transit pipe joint.

[0025] like Figure 1-4 As shown, it includes a pipe joint 1, an outer thread ring 2 is opened on the outer wall of the upper part of the pipe joint 1, a limit stopper 3 is fixedly installed on the outer wall of the middle part of the pipe joint 1, and the limit stopper 3 includes a limit stopper 6, a first mounting hole 7, a semicircular head 8, an annular groove 9, a first compression spring 10, an annular plate 11, a second mounting hole 12 and a second compression spring 13. The outer wall of the lower end of the limit stopper 6 is fixedly installed with a mounting flange 4, and a fixing bolt 5 is installed in the mounting flange 4.

[0026] The limiting retaining ring 6 is fixed to the outer wall of the middle part of the pipe joint 1, the annular groove 9 is opened inside the limiting retaining ring 6, the first mounting hole 7 is opened on the upper outer surface of the limiting retaining ring 6, and the lower end of the first mounting hole 7 is connected to the annular groove 9; the first compression spring 10 and the annular plate 11 are both located in the annular groove 9, and the outer wall of the annular plate 11 and the annular groove 9 are in sliding connection; the first compression spring 10 is fixedly installed between the lower outer surface of the annular plate 11 and the bottom of the annular groove 9, and the lower outer surface of the annular plate 11 is connected to the annular groove 9 by the first compression spring 1 0 is elastically connected to the bottom of the annular groove 9; the second mounting hole 12 is opened on the upper outer surface of the annular plate 11, and the second compression spring 13 is located in the second mounting hole 12, the lower outer surface of the second compression spring 13 is fixedly connected to the bottom of the second mounting hole 12, and the upper outer surface of the second compression spring 13 is fixedly connected to the lower outer surface of the semicircular head 8; the outer wall of the semicircular head 8 is slidingly connected to the first mounting hole 7, and the lower outer surface of the semicircular head 8 is elastically connected to the bottom of the second mounting hole 12 through the second compression spring 13.

[0027] It should be noted that the utility model is a rail transit pipe joint, which is provided with a limit stopper 3. After the external joint is threadedly connected to the pipe joint 1, the external joint squeezes the semicircular head 8 in the limit stopper 3, and the semicircular head 8 moves along the first mounting hole 7. The semicircular head 8 squeezes the second compression spring 13, driving the annular plate 11 to squeeze the first compression spring 10. After the threaded connection, the first compression spring 10 and the second compression spring 13 are both squeezed, which can provide continuous pressing force, making the threaded connection tighter, effectively preventing loosening caused by vibration or external force, and compensating for the tiny gap caused by thermal expansion and contraction of the material or long-term load, thereby maintaining the stability of the connection. The elastic characteristics of the spring can absorb and disperse vibration energy, reducing the direct impact of vibration on the connector.

[0028] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "includes a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A rail transit pipe joint, comprising a pipe joint (1), wherein an outer thread ring (2) is provided on the outer wall of the upper portion of the pipe joint (1), and wherein: A limit stopper (3) is fixedly mounted on the outer wall of the middle portion of the pipe joint (1), and the limit stopper (3) comprises a limit ring (6), a first mounting hole (7), a semicircular head (8), an annular groove (9), a first compression spring (10), an annular plate (11), a second mounting hole (12) and a second compression spring (13). A mounting flange (4) is fixedly mounted on the outer wall of the lower end of the limit ring (6), and a fixing bolt (5) is installed in the mounting flange (4).

2. A rail transit pipe joint according to claim 1, characterized in that: The limiting retaining ring (6) is fixed to the outer wall of the middle part of the pipe joint (1), the annular groove (9) is opened inside the limiting retaining ring (6), the first mounting hole (7) is opened on the outer surface of the upper end of the limiting retaining ring (6), and the lower end of the first mounting hole (7) is connected to the annular groove (9).

3. A rail transit pipe joint according to claim 2, characterized in that: The first compression spring (10) and the annular plate (11) are both located in the annular groove (9), and the outer wall of the annular plate (11) and the annular groove (9) are in sliding connection.

4. A rail transit pipe joint according to claim 3, characterized in that: The first compression spring (10) is fixedly installed between the lower outer surface of the annular plate (11) and the bottom of the annular groove (9), and the lower outer surface of the annular plate (11) is elastically connected to the bottom of the annular groove (9) through the first compression spring (10).

5. The rail transit pipe joint according to claim 4, characterized in that: The second mounting hole (12) is formed on the upper outer surface of the annular plate (11), and the second compression spring (13) is located in the second mounting hole (12). The lower outer surface of the second compression spring (13) is fixedly connected to the bottom of the second mounting hole (12), and the upper outer surface of the second compression spring (13) is fixedly connected to the lower outer surface of the semicircular head (8).

6. The rail transit pipe joint according to claim 5, characterized in that: The outer wall of the semicircular head (8) is slidably connected to the first mounting hole (7), and the outer surface of the lower end of the semicircular head (8) is elastically connected to the bottom of the second mounting hole (12) via a second compression spring (13).

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