Cold shrink cable accessory for railway lines

Abstract

The utility model relates to cold shrinkable cable accessory technical field, concretely relates to a cold shrinkable cable accessory for railway line, including cold shrinkable tube, the inside of cold shrinkable tube is provided with support belt, the back of cold shrinkable tube is provided with limit cover, the front of limit cover is opened and has moved the groove, the inside sliding installation of mobile groove has limit block, the front of limit block is installed with extension ring, and the inner wall of extension ring is installed with the block that fits. The utility model discloses through setting limit cover, mobile groove, limit block, extension ring and the block that fits etc. component, through the movement of limit block in mobile groove, not only can the extension ring be removed, but also can prevent the extension ring from falling, and the limit ring and the block that fits of installation can be with the end of cable and fit, can limit limit cover, can be with the end of cable of cold shrinkable tube cover, after taking down support belt, the end of cable of cold shrinkable tube cover, ensure the stability when cold shrinkable tube cover sets, avoid the cold shrinkable tube to be inclined or deviate when installing.

Description

Technical Field

[0001] This utility model relates to the technical field of cold-shrink cable accessories, specifically to a cold-shrink cable accessory for railway lines. Background Technology

[0002] Retractable cable accessories utilize elastic rubber materials, such as silicone rubber or EPDM rubber, which are pre-expanded at the factory and fitted with a plastic support structure to maintain their expanded state. During on-site installation, simply remove the support structure, and the pre-expanded rubber body will automatically shrink and tightly wrap around the cable due to its excellent elastic memory effect, thus forming a reliable insulation and sealing shielding layer. It has excellent environmental adaptability, absolute safety for flameless installation, and high construction efficiency.

[0003] However, different speeds of pulling the support structure will affect the cooling effect of the cold shrink tubing. Rapid pulling of the support structure will cause the cold shrink tubing to shrink violently and irregularly, which may produce wrinkles or local stress concentration. It will also cause the ends of the cold shrink tubing to shrink and shift, leaving some cable ends exposed and unprotected. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a cold shrink cable accessory for railway lines, which can effectively solve the problem of the cold shrink tube shrinking violently and irregularly, resulting in the end of the cold shrink tube shrinking and shifting.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a cold-shrink cable accessory for railway lines, including a cold-shrink tube, a support belt inside the cold-shrink tube, the support belt being spirally arranged, a limiting cover on the back of the cold-shrink tube, a movable groove on the front of the limiting cover, a limiting block slidably installed inside the movable groove, an extension ring installed on the front of the limiting block, and a fitting block installed on the inner wall of the extension ring.

[0006] Furthermore, a first fixing ring is installed on the inner wall of the limiting cover, and a compression block is installed on the inner wall of the first fixing ring.

[0007] Furthermore, an extension cover is installed on the back of the limiting cover, and the end of the extension cover is flared.

[0008] Furthermore, an elastic cover is installed on the inner wall of the extension cover, and a tension ring is installed on the inner wall of the elastic cover.

[0009] Furthermore, a rotating ring is fitted onto the surface of the extension ring, the inner wall of the rotating ring is threadedly connected to the surface of the extension ring, and an anti-slip groove is formed on the surface of the rotating ring.

[0010] Furthermore, a second fixing ring is installed on the surface of the limiting cover, the front of the second fixing ring is provided with a limiting groove, and a limiting ring is installed on the back of the rotating ring, and the limiting ring slides in conjunction with the limiting groove.

[0011] Furthermore, an extension portion is installed on the front side of the extension ring, and a receiving pouch is sleeved on the surface of the extension portion, with a through hole on the front side of the receiving pouch.

[0012] Furthermore, a support ring is fitted onto the surface of the extension ring, and the end of the cold shrink tube is fitted onto the surface of the support ring.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art: I. This utility model, by setting up components such as a limiting cover, a moving groove, a limiting block, an extension ring, and a bonding block, not only moves the extension ring by moving the limiting block in the moving groove, but also prevents the extension ring from falling off. The installed limiting ring and bonding block can fit into the end of the cable, which can limit the limiting cover and allow the cold shrink tubing to be sleeved on the end of the cable. This makes it easy to remove the support tape and then sleeve the cold shrink tubing on the end of the cable, ensuring the stability of the cold shrink tubing during installation and preventing the cold shrink tubing from tilting or shifting during installation. II. By setting up components such as an extension, a receiving bladder, and a through hole, this utility model allows the extension to install the receiving bladder. After the support strap is removed, the receiving bladder is squeezed, causing the sealant in the receiving bladder to be squeezed out from the through hole. This allows the sealant to be squeezed and applied to the end of the cable when the cold shrink tube shrinks, serving as an auxiliary sealing method to fill tiny irregular gaps and further enhance the sealing effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support ring of this utility model; Figure 3 This is a three-dimensional side view of the extension cover structure of this utility model; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the extension ring of this utility model.

[0016] Reference numerals: 1. Cold shrink tubing; 2. Support strip; 3. Restriction cover; 4. Moving groove; 5. Restriction block; 6. Extension ring; 7. Adhesive block; 8. First fixing ring; 9. Extrusion block; 10. Extension cover; 11. Elastic cover; 12. Pulling ring; 13. Rotating ring; 14. Second fixing ring; 15. Restriction groove; 16. Restriction ring; 17. Extension; 18. Receiving bladder; 19. Support ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] See attached document Figures 1-4 A cold-shrink cable accessory for railway lines includes a cold-shrink tube 1, a support band 2 arranged spirally inside the cold-shrink tube 1, a limiting cover 3 on the back of the cold-shrink tube 1, a movable groove 4 on the front of the limiting cover 3, a limiting block 5 slidably installed inside the movable groove 4, an extension ring 6 installed on the front of the limiting block 5, and a fitting block 7 installed on the inner wall of the extension ring 6. By fitting the fitting block 7 and the limiting cover 3 to the end of the cable, the cold-shrink tube 1 located on the front of the limiting cover 3 is restricted, so that after the support band 2 is pulled out, the cold-shrink tube 1 shrinks and fits onto the end of the cable, preventing the cold-shrink tube 1 from shifting during shrinkage and ensuring that the cold-shrink tube 1 is stably fitted onto the end of the cable. Furthermore, a support ring 19 is fitted on the surface of the extension ring 6, and the end of the cold-shrink tube 1 is fitted onto the surface of the support ring 19, enabling the cold-shrink tube 1 to be stably installed after the support band 2 is pulled out.

[0020] See attached document Figures 1-4The inner wall of the limiting cover 3 is equipped with a first fixing ring 8, and the inner wall of the first fixing ring 8 is equipped with a compression block 9. The compression block 9 is made of elastic material, which allows the first fixing ring 8 to be installed after the compression block 9 is installed, so that the compression block 9 is squeezed and fitted onto the end of the cable, further restricting the limiting tube. The squeezed compression block 9 can also activate the sealing function to prevent rainwater and other impurities from entering the end of the cable. An extension cover 10 is installed on the back of the limiting cover 3. The end of the extension cover 10 is set in a trumpet shape. An elastic cover 11 is installed on the inner wall of the extension cover 10, and a pull ring 12 is installed on the inner wall of the elastic cover 11. The trumpet-shaped extension cover 10 can cover the transition part of the cable end wrapped with insulating glue, and the pull ring 12 can fit tightly against the end of the cable, so that the pull ring 12 and the elastic cover 11 cooperate to block rainwater and impurities, which can further protect the end of the cable.

[0021] See attached document Figures 1-4 A rotating ring 13 is fitted onto the surface of the extension ring 6. The inner wall of the rotating ring 13 is threadedly connected to the surface of the extension ring 6. The surface of the rotating ring 13 has an anti-slip groove. When the rotating ring 13 is rotated, it causes the extension ring 6 to move, allowing the fitting block 7 to move and fit against the disassembly part at the end of the cable, thus restricting the limiting cover 3. A second fixing ring 14 is installed on the surface of the limiting cover 3. A limiting groove 15 is opened on the front of the second fixing ring 14. A limiting ring 16 is installed on the back of the rotating ring 13, and the limiting ring 16 slides in the limiting groove 15, allowing the limiting ring 16 to slide in the limiting groove 15, thereby restricting the rotating ring 13 and preventing it from shifting when rotated, ensuring that the rotating ring 13 can rotate stably.

[0022] See attached document Figures 1-3 An extension portion 17 is installed on the front side of the extension ring 6. A receiving bladder 18 is fitted on the surface of the extension portion 17. A through hole is opened on the front side of the receiving bladder 18. The receiving bladder 18 can be installed through the extension portion 17. After the sealant is filled into the receiving bladder 18, the through hole is sealed with wax. This allows the receiving bladder 18 to be squeezed when the cold shrink tube 1 shrinks. The sealant in the receiving bladder 18 can be squeezed and applied to the exposed end of the cable to eliminate the gap between the cold shrink tube 1 and the exposed end of the cable.

[0023] Working principle: The cable end is stripped to expose the copper core. Insulating tape and other materials are wrapped around the disassembled area. Then, the extension cover 10 is fitted onto the exposed end of the cable, and the pull ring 12 passes over the cable disassembly area. After the pull ring 12 is tightened, it adheres to the surface of the cable, working in conjunction with the elastic cover 11 to provide shielding and protection. Next, the rotating ring 13 is rotated, causing the extension ring 6 to move backward, bringing the bonding block 7 into contact with the area where the insulating tape is wrapped. The right end opening diameter of the limiting cover 3 is larger than the left end diameter, allowing the right end of the limiting cover 3 to adhere to the area where the insulating tape is wrapped, thus restricting the limiting cover 3 and preventing the limiting cover 3 and cold shrink tubing 1 from tilting. Finally, the cold shrink tubing 1 is fitted onto the surface of the support ring 19. Pulling out the support band 2 from the cold shrink tubing 1 causes it to shrink due to lack of support. This allows the cold shrink tubing 1 to first wrap around the support ring 19, and then, as the support band 2 is continuously pulled out, it squeezes the receiving pouch 18, allowing the sealant in the receiving pouch 18 to be squeezed and applied to the end of the cable. As the cold shrink tubing 1 shrinks, excess sealant is pushed away, thus continuously applying the sealant to the end of the cable, eliminating the gap between the cable end and the cold shrink tubing 1. This allows the cold shrink tubing 1 to stably wrap around the end of the cable. The installed limiting cover 3 and support ring 19 can restrict the cold shrink tubing 1, preventing it from shifting during shrinkage and causing some areas of the cable end to be unwrapable by the cold shrink tubing 1.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cold-shrink cable accessory for railway lines, comprising a cold-shrink tubing (1), characterized in that: The cold shrink tube (1) is provided with a support belt (2) inside, the support belt (2) is spirally arranged, the back of the cold shrink tube (1) is provided with a limiting cover (3), the front of the limiting cover (3) is provided with a moving groove (4), a limiting block (5) is slidably installed inside the moving groove (4), an extension ring (6) is installed on the front of the limiting block (5), and a fitting block (7) is installed on the inner wall of the extension ring (6).

2. The cold-shrink cable accessory for railway lines according to claim 1, characterized in that, The inner wall of the limiting cover (3) is fitted with a first fixing ring (8), and the inner wall of the first fixing ring (8) is fitted with a compression block (9).

3. The cold-shrink cable accessory for railway lines according to claim 1, characterized in that, An extension cover (10) is installed on the back of the limiting cover (3), and the end of the extension cover (10) is flared.

4. A cold-shrink cable accessory for railway lines according to claim 3, characterized in that, The inner wall of the extension cover (10) is fitted with an elastic cover (11), and the inner wall of the elastic cover (11) is fitted with a tension ring (12).

5. A cold-shrink cable accessory for railway lines according to claim 1, characterized in that, The surface of the extension ring (6) is fitted with a rotating ring (13), the inner wall of the rotating ring (13) is threadedly connected to the surface of the extension ring (6), and the surface of the rotating ring (13) is provided with an anti-slip groove.

6. A cold-shrink cable accessory for railway lines according to claim 5, characterized in that, The surface of the limiting cover (3) is equipped with a second fixing ring (14), and the front of the second fixing ring (14) is provided with a limiting groove (15). The back of the rotating ring (13) is equipped with a limiting ring (16), and the limiting ring (16) slides in cooperation with the limiting groove (15).

7. A cold-shrink cable accessory for railway lines according to claim 1, characterized in that, An extension portion (17) is installed on the front side of the extension ring (6), and a receiving bladder (18) is sleeved on the surface of the extension portion (17). A through hole is opened on the front side of the receiving bladder (18).

8. A cold-shrink cable accessory for railway lines according to claim 1, characterized in that, The surface of the extension ring (6) is fitted with a support ring (19), and the end of the cold shrink tube (1) is fitted on the surface of the support ring (19).

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