Expansion joint for preventing false contact arc striking of a contact rail

Abstract

This utility model relates to the field of urban rail technology and proposes an expansion joint for preventing arcing during contact rail connection. It includes a fixed base, an expansion tube fixedly connected to one side of the fixed base, a connecting rod slidably connected inside the expansion tube, an expansion rod fixedly connected to one side of the connecting rod, and an adjusting block fixedly connected to one end of the expansion rod. A limiting component is provided on one side of the inner wall of the expansion tube to prevent the connecting rod from rotating. In this utility model, the connecting rod is inserted inside the expansion tube, and rotating the adjusting block drives the connecting rod to rotate, causing the threaded column to be threaded into the threaded hole. This causes one end of the expansion rod to press against the expansion tube. Through the action of the opening groove, one side of the expansion tube can open and be fixed inside the contact rail. At the same time, the limiting component can lock the connecting rod to prevent reverse rotation and avoid loosening of the expansion joint.

Description

Technical Field

[0001] This utility model relates to the field of urban rail technology, specifically to an expansion joint for preventing arcing during contact rail connection. Background Technology

[0002] The contact rail is a device that transmits electrical energy to the electric traction vehicles of subway and urban rail transit systems. The contact rail system mainly consists of steel-aluminum composite rails (including the aluminum rail body and stainless steel strip), expansion joints, end elbows, and other related components and insulation support devices, providing electrical energy to electric locomotives. The transmission of electricity is achieved through the contact between the current collector shoes of the electric train and the composite rail.

[0003] The existing contact rail is connected by expansion joints, which can keep the contact rail stable. However, after the existing expansion joints are connected, the contact rail is affected by vibration and the expansion joints may loosen, which will lead to damage to the contact rail. Furthermore, the loose expansion joints may cause arcing, which may pose a certain danger. Utility Model Content

[0004] This utility model proposes an expansion joint for preventing arcing due to poor contact in contact rails, which solves the problems of expansion joints becoming loose due to vibration and the easy generation of electric arcs after the expansion joints become loose.

[0005] The technical solution of this utility model is as follows: an expansion joint for preventing false contact and arc initiation of a contact rail includes a fixed base, an expansion tube fixedly connected to one side of the fixed base, a connecting rod slidably connected inside the expansion tube, an expansion rod fixedly connected to one side of the connecting rod, an adjusting block fixedly connected to one end of the expansion rod, a limiting component that can prevent the connecting rod from rotating is provided on one side of the inner wall of the expansion tube, a threaded seat is fixedly connected to one side of the adjusting block, and a conductive component that can initiate arc is provided inside the threaded seat;

[0006] A support ring is fixedly connected to the outer wall of one side of the expansion tube, and a first clamping sleeve is threadedly connected to the outer side of the expansion tube. The first clamping sleeve is located on the other side of the support ring, and a second clamping sleeve is threadedly connected to one side of the expansion rod.

[0007] Preferably, the limiting component includes a reset spring, which is fixedly connected to the inner side of the fixed base. A movable ring is fixedly connected to one side of the reset spring. A limiting groove is formed on the inner wall of the movable ring. A limiting block is fixedly connected to one side of the connecting rod. The limiting block is slidably connected inside the limiting groove.

[0008] Preferably, the expansion tube has sliding holes on both the front and rear sides, and the movable ring has limit blocks fixedly connected to both sides, with the limit blocks slidably connected inside the sliding holes.

[0009] Preferably, an adjusting ring is slidably connected to the outer side of the expansion tube, and one end of the limiting block passes through the sliding hole and is fixedly connected to the inner wall of the adjusting ring.

[0010] Preferably, the conductive component includes a conductive block, which is slidably connected to one side of a threaded seat. A connecting seat is fixedly connected to one side of the conductive block. A threaded groove is formed on the outer side of the connecting seat, and the threaded groove is threaded into the interior of the threaded seat. A conductive wire is fixedly connected to one side of the conductive block, and a conductive clip is fixedly connected to the bottom end of the conductive wire. A connecting groove is formed on one side of the conductive clip.

[0011] Preferably, a threaded post is fixedly connected to the middle of the inner wall of the fixed base, and a threaded hole is opened at one end of the connecting rod, with the threaded post threadedly connected inside the threaded hole.

[0012] Preferably, one side of the expansion tube has evenly distributed opening grooves, and a limit ring is fixedly connected to one side of the expansion tube.

[0013] The beneficial effects of this utility model are as follows:

[0014] In this invention, a connecting rod is inserted inside the expansion tube. Rotating the adjusting block drives the connecting rod to rotate, so that the threaded column is threaded into the threaded hole. One end of the expansion rod squeezes the expansion tube. Through the action of the opening groove, one side of the expansion tube can be opened and fixed inside the contact rail. At the same time, the limiting component can lock the connecting rod to prevent the connecting rod from rotating in the opposite direction and avoid the expansion joint from becoming loose.

[0015] In this invention, the first and second clamping sleeves can clamp and fix the connected wire pads, and the conductive components can transmit the electrical energy on the contact rail to the ground when a loose connection occurs, which can prevent the contact rail from forming a short circuit and generating an electric arc, thus ensuring the safety of the contact rail. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the expansion tube proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting component structure proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the conductive component structure proposed in this utility model;

[0021] In the diagram: 1. Fixed base; 2. Expansion tube; 3. Opening groove; 4. Limiting ring; 5. Connecting rod; 6. Expansion rod; 7. Support ring; 8. Limiting assembly; 81. Return spring; 82. Movable ring; 83. Limiting slot; 84. Limiting block; 85. Adjusting ring; 86. Limiting block; 9. Conductive assembly; 91. Conductive block; 92. Connecting base; 93. Threaded groove; 94. Conductive wire; 95. Conductive clamp; 96. Connecting groove; 10. First clamping sleeve; 11. Sliding hole; 12. Second clamping sleeve; 13. Adjusting block; 14. Threaded seat; 15. Threaded post; 16. Threaded hole. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0023] Please see Figure 1-2 This utility model provides a technical solution for an expansion joint to prevent arcing during contact rail connection: An expansion joint for preventing arcing during contact rail connection includes a fixed base 1, an expansion tube 2 fixedly connected to one side of the fixed base 1, a connecting rod 5 slidably connected inside the expansion tube 2, a threaded post 15 fixedly connected to the middle of the inner wall of the fixed base 1, and a threaded hole 16 opened at one end of the connecting rod 5. The threaded post 15 is threadedly connected inside the threaded hole 16. By rotating the adjusting block 13, the connecting rod 5 is driven to rotate inside the expansion tube 2, so that the threaded post 15 is connected inside the threaded hole 16, thereby connecting and fixing the expansion tube 2 and the connecting rod 5. An expansion rod 6 is fixedly connected to one side of the expansion tube 5. An adjusting block 13 is fixedly connected to one end of the expansion rod 6. A limiting component 8 is provided on one side of the inner wall of the expansion tube 2 to prevent the connecting rod 5 from rotating. A threaded seat 14 is fixedly connected to one side of the adjusting block 13. A conductive component 9 capable of igniting an arc is provided inside the threaded seat 14. A uniformly distributed opening groove 3 is opened on one side of the expansion tube 2. A limiting ring 4 is fixedly connected to one side of the expansion tube 2. Through the opening groove 3, after the expansion rod 6 enters the interior of the expansion tube 2, one side of the expansion tube 2 can be opened, so that the limiting ring 4 can be opened outward, and the expansion joint can be stably installed inside the contact rail.

[0024] A support ring 7 is fixedly connected to the outer wall of one side of the expansion tube 2. A first clamping sleeve 10 is threadedly connected to the outer side of the expansion tube 2. The first clamping sleeve 10 is located on the other side of the support ring 7. A second clamping sleeve 12 is threadedly connected to one side of the expansion rod 6. Through the action of the first clamping sleeve 10 and the second clamping sleeve 12, the wire can be securely installed on the expansion joint, which facilitates the conduction of electrical energy.

[0025] Please see Figure 3 The limiting component 8 includes a return spring 81, which is fixedly connected to the inner side of the fixed base 1. A movable ring 82 is fixedly connected to one side of the return spring 81. A limiting groove 83 is opened on the inner wall of the movable ring 82. A limiting block 86 is fixedly connected to one side of the connecting rod 5. The limiting block 86 is slidably connected inside the limiting groove 83. Sliding holes 11 are opened on both the front and rear sides of the expansion tube 2. Limiting blocks 84 are fixedly connected to both sides of the movable ring 82. The limiting blocks 84 are slidably connected inside the sliding holes 11. An adjusting ring 85 is slidably connected to the outer side of the expansion tube 2. One end of the limiting block 84 passes through the sliding hole 11 and is fixedly connected to the inner wall of the adjusting ring 85. Through the elasticity of the return spring 81, the movable ring 82 can be pushed so that the limiting groove 83 opened inside the movable ring 82 can be fitted onto the outer side of the limiting block 86, which can limit the connecting rod 5 and prevent the connecting rod 5 from rotating in the opposite direction after connection, which would cause the expansion joint to loosen.

[0026] Please see Figure 4 The conductive component 9 includes a conductive block 91, which is slidably connected to one side of the threaded seat 14. A connecting seat 92 is fixedly connected to one side of the conductive block 91. A threaded groove 93 is provided on the outer side of the connecting seat 92, and the threaded groove 93 is threadedly connected to the inside of the threaded seat 14. A conductive wire 94 is fixedly connected to one side of the conductive block 91, and a conductive clip 95 is fixedly connected to the bottom end of the conductive wire 94. A connecting groove 96 is provided on one side of the conductive clip 95, which is threadedly connected to the inside of the threaded seat 14 through the connecting seat 92. This facilitates the connection of the conductive clip 95, allowing it to be stably installed in the ground and preventing arcing in the event of a loose connection in the expansion joint.

[0027] The working principle and usage process of this utility model are as follows: The expansion tube 2 and connecting rod 5 are inserted into the mounting holes from both sides of the contact rail. The connecting rod 5 is inserted into the expansion tube 2. The fixing seat 1 and adjusting block 13 are rotated in opposite directions. Pulling the adjusting ring 85 to the left causes the movable ring 82 to compress the return spring 81, causing the threaded column 15 to be threaded into the threaded hole 16 at one end of the connecting rod 5. This allows one end of the expansion rod 6 to be inserted into the expansion tube 2, enabling one end of the expansion tube 2 to be flipped outwards through the opening groove 3, causing the limiting ring 4 to be engaged. After the connection is completed, loosen the adjusting ring 85 on the outside of the mounting hole of the contact rail, so that the return spring 81 pushes the movable ring 82, and the limit slot 83 is fitted on the outside of the limit block 86, which can fix the connecting rod 5 and prevent the connecting rod 5 from rotating. Then, connect one end of the conductive part to both sides of the expansion joint, and clamp and fix the conductive part by rotating the first clamping sleeve 10 and the second clamping sleeve 12 respectively, so that the contact rail can conduct electricity. At the same time, install the connecting seat 92 inside the threaded seat 14, and install the conductive clip 95 at the other end into the ground.

[0028] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. An expansion joint for preventing arcing during contact rail connection, comprising a fixed base (1), characterized in that, An expansion tube (2) is fixedly connected to one side of the fixed base (1). A connecting rod (5) is slidably connected inside the expansion tube (2). An expansion rod (6) is fixedly connected to one side of the connecting rod (5). An adjusting block (13) is fixedly connected to one end of the expansion rod (6). A limiting component (8) is provided on one side of the inner wall of the expansion tube (2) to prevent the connecting rod (5) from rotating. A threaded seat (14) is fixedly connected to one side of the adjusting block (13). A conductive component (9) capable of igniting an arc is provided inside the threaded seat (14). A support ring (7) is fixedly connected to the outer wall of one side of the expansion tube (2), and a first clamping sleeve (10) is threadedly connected to the outer side of the expansion tube (2). The first clamping sleeve (10) is located on the other side of the support ring (7), and a second clamping sleeve (12) is threadedly connected to one side of the expansion rod (6).

2. The expansion joint for preventing arcing during contact rail connection as described in claim 1, characterized in that, The limiting component (8) includes a reset spring (81), which is fixedly connected to the inner side of the fixed base (1). A movable ring (82) is fixedly connected to one side of the reset spring (81). A limiting groove (83) is opened on the inner wall of the movable ring (82). A limiting block (86) is fixedly connected to one side of the connecting rod (5). The limiting block (86) is slidably connected inside the limiting groove (83).

3. An expansion joint for preventing arcing during contact rail connection as described in claim 2, characterized in that, The expansion tube (2) has sliding holes (11) on both the front and rear sides, and the movable ring (82) has limit blocks (84) fixedly connected to both sides. The limit blocks (84) are slidably connected inside the sliding holes (11).

4. An expansion joint for preventing arcing during contact rail connection as described in claim 3, characterized in that, An adjusting ring (85) is slidably connected to the outside of the expansion tube (2), and one end of the limiting block (84) passes through the sliding hole (11) and is fixedly connected to the inner wall of the adjusting ring (85).

5. An expansion joint for preventing arcing during contact rail connection as described in claim 1, characterized in that, The conductive component (9) includes a conductive block (91), which is slidably connected to one side of a threaded seat (14). A connecting seat (92) is fixedly connected to one side of the conductive block (91). A threaded groove (93) is provided on the outer side of the connecting seat (92). The threaded groove (93) is threadedly connected to the inside of the threaded seat (14). A conductive wire (94) is fixedly connected to one side of the conductive block (91). A conductive clip (95) is fixedly connected to the bottom end of the conductive wire (94). A connecting groove (96) is provided on one side of the conductive clip (95).

6. An expansion joint for preventing arcing during contact rail connection as described in claim 1, characterized in that, A threaded column (15) is fixedly connected to the middle of the inner wall of the fixed base (1), and a threaded hole (16) is opened at one end of the connecting rod (5). The threaded column (15) is threadedly connected to the inside of the threaded hole (16).

7. An expansion joint for preventing arcing during contact rail connection as described in claim 1, characterized in that, The expansion tube (2) has evenly distributed opening grooves (3) on one side, and a limit ring (4) is fixedly connected to one side of the expansion tube (2).

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