Zipper type heat shrink tube for high-voltage cable composite terminal

Abstract

The invention discloses a zipper type heat shrink tube for a high-voltage cable composite terminal, which comprises a cable body, the cable body is sleeved with a heat shrink tube body, the heat shrink tube body is of an open type structure, two openings of the heat shrink tube body are fixedly connected with extension sleeves, the two extension sleeves are the same in size and shape, and the two extension sleeves are connected with a zipper. The original design of the opening type heat shrink tube and the zipper clamping strip is adopted, the limitation that a traditional heat shrink tube must be sleeved integrally is broken through, zipper type mechanical locking is achieved through interference fit of the flexible extension sleeve and the inverted tooth lock catch, rapid closing and fixing can be achieved without special tools, and only alignment of the extension sleeve, penetrating of the clamping strip and heating are needed in the installation process. And the innovative structure is particularly suitable for on-site repair of high-voltage cables with limited space, the power failure time is remarkably shortened, and the emergency repair efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable repair, in particular to a zipper type heat shrink tube for high-voltage cable composite terminal. BACKGROUND

[0002] High-voltage cables may be damaged due to external force, insulation aging, joint failure or environmental corrosion during long-term operation. If not repaired in time, it may cause short circuit, electric leakage and even fire. Repairing can restore insulation performance, prevent water and impurities from entering to cause further deterioration, and ensure the safety and stability of power transmission. In addition, repairing can prolong the service life of the cable, reduce the risk of power failure, avoid equipment damage or power interruption caused by cable failure, and ensure the reliable operation of the power grid. Therefore, timely repairing of high-voltage cables is an important measure to maintain the safety and efficiency of the power system.

[0003] In the existing high-voltage cable repair technology, the traditional heat shrink tube needs to be completely sleeved on the cable body, which is difficult to construct in space-limited or cable-laid scenes, time-consuming to operate and easy to damage the core. The waterproof relies on a single hot melt glue layer, which is easy to peel off under long-term pressure to form a water seepage channel. The insulation and mechanical protection need to be wound with multiple layers of materials such as water-blocking tape and reinforcing tape in steps, which is easy to leave air gaps or not tightly overlapped between layers, resulting in electric field distortion and partial discharge hazards. Uneven heating during heat shrinkage is easy to produce wrinkles or insufficient shrinkage, affecting the sealing reliability. SUMMARY

[0004] The purpose of the present application is to provide a zipper type heat shrink tube for high-voltage cable composite terminal, which solves the problem that the traditional heat shrink tube needs to be completely sleeved on the cable body, which is difficult to construct in space-limited or cable-laid scenes, time-consuming to operate and easy to damage the core.

[0005] To achieve the above purpose, a zipper type heat shrink tube for high-voltage cable composite terminal is provided, which comprises a cable body, the outer side of the cable body is sleeved with a heat shrink tube body, the heat shrink tube body is of an open structure, two openings of the heat shrink tube body are fixedly connected with extension sleeves, the sizes and shapes of the two extension sleeves are the same.

[0006] The outer end of the extension sleeve is provided with a zipper strip, and the inner end opening of the zipper strip is the same in shape as the two extension sleeves.

[0007] According to the zipper type heat shrink tube for high-voltage cable composite terminal, the water-swelling adhesive tape is arranged at one end of the heat shrink tube body close to the cable body.

[0008] According to the zipper type heat shrink tube for high-voltage cable composite terminal, the other end of the water-swelling adhesive tape is provided with a functional layer.

[0009] According to the zip fastener type heat shrinkable tube for the high-voltage cable composite terminal, the other end of the functional layer is provided with a reinforcing layer.

[0010] According to the zip fastener type heat shrinkable tube for the high-voltage cable composite terminal, the outermost end of the heat shrinkable tube body is provided with a hot melt sealant layer, and one end of the hot melt sealant layer is connected with the reinforcing layer.

[0011] The above-mentioned scheme has the beneficial effects of:

[0012] 1. The patent adopts the unique design of open heat shrinkable tube plus zip fastener strip, breaking through the limitation that the traditional heat shrinkable tube must be completely sleeved, realizing zip fastener type mechanical locking through the interference fit of the flexible extension sleeve and the inverted tooth lock buckle, quickly closing and fixing without special tools, only needing to align the extension sleeve, insert the strip and heat during installation, greatly simplifying the process, and the innovative structure is especially suitable for high-voltage cable on-site repair with limited space, significantly shortening the power outage time and improving the emergency repair efficiency and safety.

[0013] 2. The heat shrinkable tube of the patent integrates the stepped waterproof interface and the composite functional layer, realizes the integration of multiple protections, the inner layer expands the waterproof tape to actively block the water seepage path; the semi-conductive water-resistant tape uniformly distributes the electric field, the ethylene-propylene self-fusion tape strengthens the insulation, and the aramid woven layer provides radial tear resistance support, and the functions of each layer are coordinated, so that waterproofing, insulation strengthening, mechanical protection and stress control are simultaneously completed in a single heat shrinkage process.

[0014] Additional aspects and advantages of the application will be set forth in part in the following description, will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and examples;

[0016] Fig. 1 It is a whole structure schematic view of the zip fastener type heat shrinkable tube for the high-voltage cable composite terminal of the application;

[0017] Fig. 2 It is a top view of the zip fastener type heat shrinkable tube for the high-voltage cable composite terminal of the application;

[0018] Fig. 3 It is a sectional view of the zip fastener type heat shrinkable tube for the high-voltage cable composite terminal of the application.

[0019] LEGEND:

[0020] 1. Heat shrinkable tube body; 2. Cable body; 3. Extension sleeve; 4. Zip fastener strip; 5. Water-swelling tape; 6. Functional layer; 7. Reinforcing layer; 8. Hot melt sealant layer. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be described in detail below, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0022] With reference to Figs. 1-3 , the embodiment of the present application is a zip type heat shrink tube for high voltage cable composite terminal, comprising a cable body 2, the outer side of the cable body 2 is sleeved with a heat shrink tube body 1, the heat shrink tube body 1 is of open structure, two openings of the heat shrink tube body 1 are fixedly connected with extension sleeves 3, the sizes and shapes of the two extension sleeves 3 are the same, the two extension sleeves 3 can be the same shape as the opening of the zip fastener 4 after contacting each other, the staff can directly put the zip fastener 4 opening corresponding to the extension sleeve 3, so as to wear the zip fastener 4 on the outer end of the extension sleeve 3, thereby completing the rapid fixing of the heat shrink tube body 1, the extension sleeve 3 is made of flexible EPDM, the cross section is in stepped flange structure, forming a labyrinth type waterproof interface, the zip fastener 4 is made of nylon 66 material with reverse tooth lock, the tensile strength is greater than or equal to 80MPa, and the flange of the extension sleeve 3 forms an interference fit;

[0023] The outer end of the extension sleeve 3 corresponds to the installation of the zip fastener 4, the inner end opening of the zip fastener 4 is the same shape as the two extension sleeves 3, the heat shrink tube body 1 close to the cable body 2 is provided with a water-swelling adhesive tape 5, the other end of the water-swelling adhesive tape 5 is provided with a functional layer 6, the other end of the functional layer 6 is provided with a reinforcing layer 7, the outermost end of the heat shrink tube body 1 is provided with a hot melt sealant layer 8, and one end of the hot melt sealant layer 8 is connected with the reinforcing layer 7, the water-swelling adhesive tape 5: close to the semi-conductive layer of the cable body 2, made of polyurethane / acrylic salt composite, the width covers both sides of the stress cone area by 50mm, the functional layer 6: contains a double-layer composite structure - inner layer: semi-conductive water-blocking tape, winding lap rate 50%; outer layer: ethylene-propylene rubber insulation self-fusion tape, half winding 2 layers, the reinforcing layer 7 is composed of 45° cross woven aramid fiber belt, covering the full length of the functional layer 6.

[0024] Working principle: when using, first clean the damaged part of the cable, when installing, the damaged part should be placed in the middle of the repair patch, mark the two sides of the sleeve with a white pen, polish the cable at both ends in the circumferential direction with a sand cloth strip, clean the polished cable part, paste the heat insulation aluminum foil outward from 10mm inside the marked position, scrape the heat insulation aluminum foil with a hard object and smear glue to make it adhere to the cable, the length of the pasted aluminum foil in the sleeve should be 10mm, then the heat shrink tube body 1 is sleeved on the outer end of the cable body 2, at this time the two extension sleeves 3 contact each other, then the zipper clasp strip 4 is inserted into the outer side of the two extension sleeves 3, the fixation of the heat shrink tube body 1 is completed, finally the zipper clasp strip 4 is preheated for 10 seconds with a small fire, then the heat shrink tube body 1 is uniformly heated and shrunk from the middle to both ends, the glue at both ends of the heat shrink tube 1 overflows, the color paint completely turns into yellow brown, and the construction is completed.

[0025] The above has made detailed description to the embodiments of the application combined with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the application.

Claims

1. A zipper-type heat shrink tubing for a high-voltage cable composite terminal, comprising a cable body (2), characterized in that: The outer side of the cable body (2) is provided with a heat shrink tube body (1), the heat shrink tube body (1) is an open structure, and the two openings of the heat shrink tube body (1) are fixedly connected to an extension sleeve (3), and the two extension sleeves (3) are the same in size and shape; The outer ends of the extension sleeves (3) are correspondingly mounted with zipper clips (4), and the inner end openings of the zipper clips (4) are of the same shape as the two extension sleeves (3).

2. The zipper type heat shrink tubing for high voltage cable composite terminal according to claim 1, characterized in that: One end of the heat shrink tube body (1) close to the cable body (2) is provided with a water-swellable adhesive tape (5).

3. The zipper type heat shrink tubing for high voltage cable composite terminal according to claim 2, characterized in that: The other end of the water-swellable tape (5) is provided with a functional layer (6).

4. The zipper type heat shrink tubing for high voltage cable composite terminal according to claim 3, characterized in that: A reinforcement layer (7) is provided at the other end of the functional layer (6).

5. The zipper type heat shrink tubing for high voltage cable composite terminal according to claim 4, characterized in that: The outermost end of the heat shrink tube body (1) is provided with a hot melt sealant layer (8), and one end of the hot melt sealant layer (8) is connected to the reinforcement layer (7).

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