A high-expansion cold shrink cable accessory

Abstract

This utility model discloses a high expansion ratio cold shrink cable accessory, including a cold shrink sleeve. The cold shrink sleeve contains a support mechanism for supporting it. The support mechanism includes a support rope core, which is a tubular structure with an integrally formed spiral tear seam. This utility model has a simple structure and reasonable design. Through the spiral support rope core, when the cold shrink sleeve is transported to a set position, the operator spirally pulls out the support rope core, causing it to detach from the cold shrink sleeve. The inner wall of the cold shrink sleeve fits against the side wall of the cable, making it difficult for the cold shrink sleeve to detach from the cable connection point. This seals and insulates the cable connection point, protecting the cable and extending its service life.

Description

Technical Field

[0001] This utility model relates to the technical field of cold shrink cable accessories, specifically a high expansion ratio cold shrink cable accessory. Background Technology

[0002] Medium-voltage cold-shrink accessories refer to cable terminations or joints used in the installation of medium-voltage cables with voltage levels between 6kV and 35kV that can shrink without heating. Compared to heat-shrink accessories, cold-shrink technology relies on pre-expanded elastomer materials that automatically shrink after the support core is removed, tightly wrapping the cable insulation layer to form a reliable seal and insulation.

[0003] The shortcomings of existing technology:

[0004] The aforementioned medium-voltage cold-shrink accessories, including cold-shrink sleeves, can easily slip relative to the connection points of two medium-voltage cables when the workers place the cold-shrink sleeves on the connection points. This can cause the connection points of the two medium-voltage cables to detach from the cold-shrink sleeves, leading to sealing failure at the connection points, moisture penetration and chemical corrosion, resulting in aging of the cable insulation layer, oxidation of the conductor, and ultimately affecting the service life of the cable. Utility Model Content

[0005] The purpose of this invention is to provide a high expansion ratio cold shrink cable accessory to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high expansion ratio cold shrink cable accessory includes a cold shrink sleeve, and a support mechanism for supporting the cold shrink sleeve is provided inside the cold shrink sleeve. The support mechanism includes a support rope core, which is a tubular structure and has a spiral tear seam integrally formed on the tubular structure.

[0008] Preferably, the support rope core is tubular inside the cold shrink sleeve, and becomes rope-like after being pulled out of the cold shrink sleeve.

[0009] Preferably, a transverse groove is horizontally formed on the inner wall of the cold shrink sleeve, and an inner semiconductor layer is disposed in the transverse groove. The inner side of the inner semiconductor layer is used to abut against the connection part of the two cables.

[0010] Preferably, the cold shrink sleeve has two stress cones inside, which are located at both ends of the cold shrink sleeve. Each stress cone is trumpet-shaped, and the opening of each stress cone faces the inner semiconductor layer.

[0011] Preferably, the support mechanism further includes a transmission rope core, one end of which is connected to the end of the support rope core, and the ends of the transmission rope core and the support rope core that are away from the transmission rope core are located on the same side of the cold shrink sleeve.

[0012] Preferably, a rotating ring is provided inside the cold shrink sleeve. The inner sidewall of the rotating ring is slidably connected to the sidewall of the cable. The sidewall of the rotating ring is used to abut against the connection part of the cable. The sidewall of the rotating ring is connected to the end of the transmission rope core. A connecting groove is provided on the outer sidewall of the rotating ring. When the connection parts of the two cables are transmitted to the set position, the vertical plane of the sidewall of the connecting groove coincides with the vertical plane of the sidewall of the cold shrink sleeve.

[0013] Preferably, an anti-slip layer is provided on the bottom wall of the connecting groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This high expansion ratio cold shrink cable accessory utilizes a spiral support rope core on the cold shrink sleeve. When the worker transfers the cold shrink sleeve to the connection point of two cables, the worker holds the cold shrink sleeve to limit its position. Then, the worker spirally pulls out the support rope core from one end of the cold shrink sleeve. Driven by elastic potential energy, the inner wall of the end of the cold shrink sleeve gradually adheres to the side wall of the cable until the inner wall of the cold shrink sleeve is completely adhered to the side wall of the cable. At the same time, as the inner wall of the cold shrink sleeve gradually abuts against the side wall of the cable, the pressure of the cold shrink sleeve on the cable gradually increases, thereby increasing the friction between the cold shrink sleeve and the side wall of the cable. This makes it difficult for the cold shrink sleeve to move relative to the cable, thus preventing the cold shrink sleeve from detaching from the cable. This seals the connection point of the cable, preventing moisture penetration and chemical corrosion, thereby extending the service life of the cable.

[0016] 2. This high expansion ratio cold shrink cable accessory, through the anti-slip layer on the rotating ring, makes it less likely for the worker to slip on the rotating ring when rotating it, thus making it easier for the worker to spirally pull out the transmission rope core and support rope core, so that the cold shrink sleeve shrinks synchronously in the circumferential direction, reducing the local twisting or folding of the cold shrink sleeve, and thus making the cold shrink sleeve less prone to wrinkles. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of a portion of the structure of Embodiment 2 of this utility model, mainly showing the stress cone;

[0019] Figure 3This is a partial structural schematic diagram of Embodiment 2 of the present invention, mainly showing the transmission rope core;

[0020] Figure 4 This is an exploded view of a portion of the structure of Embodiment 2 of this utility model, mainly showing the connecting groove;

[0021] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention, mainly showing the cold shrink sleeve being fitted onto the cable;

[0022] Figure 6 This is a cross-sectional schematic diagram of the overall structure of Embodiment 2 of this utility model, mainly showing the contact between the side wall of the rotating ring and the connection part of the cable;

[0023] Figure 7 This is a cross-sectional schematic diagram of the overall structure of Embodiment 2 of this utility model, mainly showing that the vertical plane where the sidewall of the connecting groove is located coincides with the vertical plane where the sidewall of the cold shrink sleeve is located.

[0024] In the diagram: 1. Cold shrink sleeve; 11. Cable; 12. Connection part; 2. Support mechanism; 21. Support rope core; 22. Transmission rope core; 31. Transverse groove; 32. Inner semiconductor layer; 41. Stress cone; 5. Rotating ring; 51. Connecting groove; 6. Anti-slip layer; 7. Outer semiconductor layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0029] Please see Figure 1-7 As shown, this utility model provides a technical solution for a high expansion ratio cold shrink cable accessory:

[0030] Example 1:

[0031] A high expansion ratio cold-shrink cable accessory includes a cold-shrink sleeve 1. When the operator places the cold-shrink sleeve 1 onto two medium-voltage cables 11, the inner wall of the cold-shrink sleeve 1 is slidably connected to the side wall of the medium-voltage cable 11. A transverse groove 31 is horizontally formed on the inner wall of the cold-shrink sleeve 1, and the transverse groove 31 is located in the middle of the cold-shrink sleeve 1. An outer semiconductor layer 7 is installed on the outer wall of the cold-shrink sleeve 1, and the horizontally arranged outer semiconductor layer 7 is sleeved on the cold-shrink sleeve 1 and fixedly connected to the cold-shrink sleeve 1.

[0032] The cold shrink sleeve 1 contains an inner semiconductor layer 32, stress cones 41, and a support mechanism 2. The horizontally arranged inner semiconductor layer 32 is located within a transverse groove 31 and is fixedly connected to the side wall of the transverse groove 31. The inner side wall of the inner semiconductor layer 32 is used to abut against the connection points 12 of the two medium-voltage cables 11. There are two horizontally arranged stress cones 41, located on opposite sides of the inner semiconductor layer. Each stress cone 41 is trumpet-shaped, with its opening facing the inner semiconductor layer 32. The support mechanism 2 includes a support rope core 21, which is horizontally arranged within the cold shrink sleeve 1 and slidably connected to the inner side wall of the cold shrink sleeve 1. The support rope core 21 has a tubular structure and an integrally formed spiral tear seam. When the support rope core 21 is in the cold shrink sleeve 1, it is tubular; when the support rope core 21 is pulled out of the cold shrink sleeve 1 by the operator, it becomes rope-like.

[0033] The operator adjusts the position of the cold shrink sleeve 1 so that it fits onto the cable 11. The cold shrink sleeve 1 is then moved along the connection point 12 near the cable 11. When the operator moves the cold shrink sleeve 1 to the connection point 12 of the two cables 11, the operator holds the cold shrink sleeve 1 to limit its position. Then, the operator spirally pulls out the support rope core 21 from one end of the cold shrink sleeve 1. Driven by elastic potential energy, the inner wall of the cold shrink sleeve 1 gradually adheres to the side wall of the cable 11 until it is completely in contact with the side wall. Simultaneously, as the inner wall of the cold shrink sleeve 1 gradually abuts against the side wall of the cable 11, the pressure of the cold shrink sleeve 1 on the cable 11 gradually increases, thereby increasing the friction between the cold shrink sleeve 1 and the side wall of the cable 11. This makes it difficult for the cold shrink sleeve 1 to move relative to the cable 11, thus preventing it from detaching from the cable 11. This seals the connection point 12 of the cable 11, preventing moisture penetration and chemical corrosion, thereby extending the service life of the cable 11.

[0034] Example 2:

[0035] Based on Embodiment 1, the support mechanism 2 further includes a transmission rope core 22. One end of the transmission rope core 22 is fixedly connected to the end of the support rope core 21, and the ends of the transmission rope core 22 and the support rope core 21 that are away from the transmission rope core 21 are both located at the same end of the cold shrink sleeve 1. A rotating ring 5 is installed inside the cold shrink sleeve 1. The rotating ring 5 is located inside the support rope core 21, and the side wall of the rotating ring 5 is fixedly connected to the end of the transmission rope core 22. The side wall of the rotating ring 5 is used to abut against the connection part 12 of the cable 11. The inner side wall of the rotating ring 5 is slidably connected to the side wall of the cable 11, and a horizontal connecting groove 51 is provided on the outer side wall of the rotating ring 5. An anti-slip layer 6 is installed on the bottom wall of the connecting groove 51. The anti-slip layer 6 is made of insulating rubber material.

[0036] When the cold shrink sleeve 1 slides on the cable 11 along the direction close to the connection part 12 of the cable 11, the movement of the cold shrink sleeve 1 drives the transmission rope core 22, the support rope core 21, and the rotating ring 5 to move synchronously, so that the cold shrink sleeve 1 is fitted onto the connection parts 12 of the two cables 11 until the side wall of the rotating ring 5 abuts against the connection parts 12 of the cable 11. At this time, there is a gap between the connection parts 12 of the cable 11 and the inner semiconductor layer 32. Then, the operator continues to move the cold shrink sleeve 1 in the same direction. Under the push of the connection parts 12 of the cable 11, the rotating ring 5 moves away from the inner semiconductor layer 32, so that the side of the rotating ring 5 away from the connection parts 12 of the cable 11 extends outside the cold shrink sleeve 1. When the cold shrink sleeve 1 is transmitted to the set position, that is, when the inner side wall of the inner semiconductor layer 32 abuts against the connection parts 12 of the cable 11. When connected, the vertical plane of the connecting groove 51 on the rotating ring 5 coincides with the vertical plane of the side wall of the cold shrink sleeve 1, thus reminding the operator that the cold shrink sleeve 1 has been transferred to the set position. At this time, the operator drives the rotating ring 5 to move away from the cold shrink sleeve 1 and drives the rotating ring 5 to rotate, thereby spirally pulling out the transmission rope core 22 and the support rope core 21, so that the inner side wall of the cold shrink sleeve 1 fits against the side wall of the cable 11, thus making it convenient for the operator to install the cold shrink sleeve 1 at the connection part 12 of the two cables 11. This makes the inner side wall of the inner semiconductor layer 32 inside the cold shrink sleeve 1 fit against the connection part 12 of the two cables 11, thus making the cold shrink sleeve 1 less likely to move at will, thereby sealing and insulating the connection part 12 of the two cables 11, protecting the connection part 12 of the two cables 11, and extending the service life of the cables 11.

[0037] In this embodiment of the high expansion ratio cold shrink cable 11 accessory, the operator places the cold shrink sleeve 1 onto the cable 11 and moves it along the direction close to the connection part 12 of the two cables 11 until it is fully fitted onto the connection part 12. The operator continues to move the cold shrink sleeve 1 in the same direction until the side wall of the rotating ring 5 inside the cold shrink sleeve 1 abuts against the side wall of the connection part 12 of the two cables 11. The operator continues to move the cold shrink sleeve 1 in the same direction, and under the push of the connection part 12 of the two cables 11, the side wall of the rotating ring 5 is transferred to the outside of the cold shrink sleeve 1 until the vertical plane of the side wall of the connecting groove 51 on the rotating ring 5 coincides with the vertical plane of the side wall of the cold shrink sleeve 1. At this point, the cold shrink sleeve 1 is transported to the set position, that is, the inner semiconductor layer 32 inside the cold shrink sleeve 1 is in contact with the connection part 12 of the two cables 11, thereby reminding the staff to pull out the rotating ring 5. Finally, through the anti-slip layer 6, the staff drives the rotating ring 5 to rotate and moves the rotating ring 5 away from the cold shrink sleeve 1, thereby causing the transmission rope core 22 and the support rope core 21 to be pulled out in a spiral shape, thereby causing the inner side wall of the cold shrink sleeve 1 to be in contact with the side wall of the cable 11, thus making it less likely for the cold shrink sleeve 1 to slide relative to each other and cause the inner semiconductor layer 32 inside the cold shrink sleeve 1 to detach from the connection part 12 of the two cables 11, improving the sealing and insulation effect, reducing the damage to the connection part 12 of the cable 11, and extending the service life of the cable 11.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high expansion ratio cold shrink cable accessory, comprising a cold shrink sleeve (1), characterized in that: The cold shrink sleeve (1) is provided with a support mechanism (2) for supporting the cold shrink sleeve (1). The support mechanism (2) includes a support rope core (21), which is a tubular structure and has a spiral tear seam integrally formed on the tubular structure.

2. The high expansion ratio cold shrink cable accessory according to claim 1, characterized in that: The support rope core (21) is tubular inside the cold shrink sleeve (1), and becomes rope-like after being pulled out of the cold shrink sleeve (1).

3. The high expansion ratio cold shrink cable accessory according to claim 1, characterized in that: The inner wall of the cold shrink sleeve (1) is provided with a horizontal groove (31), and an inner semiconductor layer (32) is provided in the horizontal groove (31). The inner side of the inner semiconductor layer (32) is used to abut against the connection part (12) of the two cables (11).

4. The high expansion ratio cold shrink cable accessory according to claim 3, characterized in that: The cold shrink sleeve (1) has two stress cones (41) inside. The two stress cones (41) are located at both ends of the cold shrink sleeve (1). Each stress cone (41) is trumpet-shaped and the opening of each stress cone (41) faces the inner semiconductor layer (32).

5. A high expansion ratio cold shrink cable accessory according to claim 2, characterized in that: The support mechanism (2) further includes a transmission rope core (22), one end of which is connected to the end of the support rope core (21). The end of the transmission rope core (22) away from the support rope core (21) and the end of the support rope core (21) away from the transmission rope core (22) are both located on the same side of the cold shrink sleeve (1).

6. A high expansion ratio cold shrink cable accessory according to claim 5, characterized in that: The cold shrink sleeve (1) is provided with a rotating ring (5). The inner side wall of the rotating ring (5) is slidably connected to the side wall of the cable (11). The side wall of the rotating ring (5) is used to abut against the connection part (12) of the cable (11). The side wall of the rotating ring (5) is connected to the end of the transmission rope core (22). A connecting groove (51) is provided on the outer side wall of the rotating ring (5). When the connection part (12) of the two cables (11) is transmitted to the set position, the vertical plane where the side wall of the connecting groove (51) is located coincides with the vertical plane where the side wall of the cold shrink sleeve (1) is located.

7. A high expansion ratio cold shrink cable accessory according to claim 6, characterized in that: An anti-slip layer (6) is provided on the bottom wall of the connecting groove (51).

Images