Axial water-blocking cable

Abstract

The utility model discloses an axial water-blocking cable, which comprises a cable core, a protective layer is arranged on the cable core, the cable core comprises an isolating layer, and the inner surface of the isolating layer is contacted with the outer surface of the cable core. The interior of the cable can rapidly expand when encountering water through the arrangement of a high polymer material, so that water is prevented from further diffusing in the longitudinal direction of the cable, meanwhile, the effect of an electric field can be effectively shielded through the arrangement of a shielding layer, interference of a magnetic field generated by current to other elements is prevented, and the waterproof performance is improved through the arrangement of a waterproof layer. The waterproof performance of the exterior of the cable can be effectively and conveniently improved, so that external water can be prevented from permeating into the cable, and the outer surface of the cable can be effectively prevented from being corroded by the environment in contact with the cable through the arrangement of the corrosion-resistant layer, so that the cable is prevented from losing a protection effect.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an axial water-blocking cable. Background Art

[0002] Cable longitudinal water blocking is a cable waterproofing technology, which is mainly used to prevent moisture from penetrating along the longitudinal direction of the cable. When the cable is damaged externally, such as the cable is cut, the cable joint is damaged or the radial water blocking structure is damaged, the longitudinal water blocking structure can prevent moisture from entering the cable and diffusing along the longitudinal direction. Longitudinal water blocking is usually achieved by using water-blocking materials on the inside and outside of the insulation layer. These water-blocking materials usually contain a material that can swell when exposed to water. When moisture enters from the cable end or from the sheath defect, this material will expand rapidly to prevent moisture from further diffusing along the longitudinal direction of the cable. In addition, a water-blocking cable core can be used or water-blocking materials can be filled in the gaps of the twisted conductive core and the core shielding area to block the diffusion channel of moisture in the cable core.

[0003] In the prior art, cables are used in a variety of environments, and direct or indirect contact with water is unavoidable. When the cables are used, if the water barrier properties of the cables are poor, direct or indirect water will penetrate into the cables, causing a significant decrease in the electrical conductivity of the cable cores, thereby significantly reducing the service life of the cables.

[0004] Therefore, an axial water-blocking cable is proposed. Utility Model Content

[0005] The utility model aims to provide an axial water-blocking cable to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an axial water-blocking cable, comprising a cable core, a protective layer is provided on the cable core, the protective layer comprises an isolation layer, the inner surface of the isolation layer is in contact with the outer surface of the cable core, an inner insulating layer is fixedly installed on the outer surface of the isolation layer, a water-blocking layer is fixedly installed on the outer surface of the inner insulating layer, a shielding layer is fixedly installed on the outer surface of the water-blocking layer, an outer insulating layer is fixedly installed on the outer surface of the shielding layer, a waterproof layer is fixedly installed on the outer surface of the outer insulating layer, and a corrosion-resistant layer is fixedly installed on the outer surface of the waterproof layer;

[0007] The waterproof layer includes a polyethylene layer, the outer surface of the polyethylene layer is fixedly mounted on the inner surface of the corrosion-resistant layer, a butyl rubber layer is fixedly mounted on the inner surface of the polyethylene layer, polytetrafluoroethylene is fixedly mounted on the inner surface of the butyl rubber layer, and the inner surface of the polytetrafluoroethylene is fixedly mounted on the outer surface of the outer insulating layer.

[0008] Preferably, the water-blocking layer comprises water-blocking yarn and water-blocking powder, wherein the water-blocking yarn is made of nylon and is evenly wound on the inner insulating layer, and the water-blocking powder is made of sodium polyacrylate and is evenly distributed on the outer surface of the water-blocking yarn.

[0009] Preferably, the shielding layer is wound with soft copper wires, and the distance between the copper wires is two to four millimeters.

[0010] Preferably, the width of the polyethylene layer ranges from four millimeters to six millimeters, the width of the butyl rubber layer ranges from two millimeters to five millimeters, and the width of the polytetrafluoroethylene layer ranges from five millimeters to eight millimeters.

[0011] Preferably, the corrosion-resistant layer comprises a chromium-containing oxide film layer, the inner surface of the chromium-containing oxide film layer is fixedly mounted on the outer surface of the polyethylene layer, and a titanium-zirconium conversion film layer is fixedly mounted on the outer surface of the chromium-containing oxide film layer.

[0012] Preferably, the width of the titanium-zirconium conversion film layer ranges from 60 micrometers to 100 micrometers, and the width of the chromium-containing oxide film layer ranges from 50 micrometers to 150 micrometers.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model arranges structures such as a water-blocking layer, an outer insulating layer, a waterproof layer and a corrosion-resistant layer, arranges a water-blocking layer on the cable core, and utilizes the arrangement of polymer materials. When the inside of the cable meets water, it will expand rapidly, thereby preventing the moisture from further diffusing along the longitudinal direction of the cable. At the same time, the arrangement of the shielding layer can effectively shield the effect of the electric field, and prevent the magnetic field generated by the current from interfering with other components. The arrangement of the waterproof layer can effectively increase the waterproof performance of the outside of the cable, thereby preventing external water from penetrating into the inside of the cable. The arrangement of the corrosion-resistant layer can effectively prevent the environment in which the cable contacts from corroding the outer surface of the cable, thereby causing the cable to lose its protective function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the protective layer of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the waterproof layer of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the corrosion-resistant layer of the utility model;

[0019] In the figure: 1, cable core; 2, protective layer; 21, isolation layer; 22, inner insulation layer; 23, water-blocking layer; 24, shielding layer; 25, outer insulation layer; 26, waterproof layer; 261, polyethylene layer; 262, butyl rubber layer; 263, polytetrafluoroethylene; 27, corrosion-resistant layer; 271, titanium-zirconium conversion film layer; 272, chromium-containing oxide film layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: See Figure 1-4 The utility model provides a technical solution: an axial water-blocking cable, comprising a cable core 1, a protective layer 2 is provided on the cable core 1, the protective layer 2 comprises an isolation layer 21, the inner surface of the isolation layer 21 contacts the outer surface of the cable core 1, an inner insulating layer 22 is fixedly installed on the outer surface of the isolation layer 21, a water-blocking layer 23 is fixedly installed on the outer surface of the inner insulating layer 22, the water-blocking layer 23 comprises a water-blocking yarn and a water-blocking powder, the water-blocking yarn is made of nylon material and is evenly wound on the inner insulating layer 22, the water-blocking powder is made of sodium polyacrylate and is evenly distributed on the outer surface of the water-blocking yarn, a shielding layer 24 is fixedly installed on the outer surface of the water-blocking layer 23, the shielding layer 24 is wound with soft copper wire, and the distance between the copper wires is two to four millimeters, an outer insulating layer 25 is fixedly installed on the outer surface of the shielding layer 24, and the outer surface of the outer insulating layer 25 is fixedly installed A waterproof layer 26 is fixedly installed, and a corrosion-resistant layer 27 is fixedly installed on the outer surface of the waterproof layer 26. Through the setting of the water-blocking layer 23, the reinforcing ribs composed of nylon make the yarn have good tensile strength and elongation. The powder containing sodium polyacrylate is evenly applied on the nylon. When the main body of the water-blocking yarn fiber meets water, it can quickly expand to form a large gel-like substance. This gel-like substance has a strong water-retaining capacity and can effectively prevent the growth of water trees, thereby preventing water from continuing to penetrate and diffuse. The shielding layer 24 is wound with copper wire. It mainly plays the role of shielding the electric field to prevent the magnetic field generated by the current from interfering with other components. At the same time, the shielding layer 24 can also play a certain grounding protection role. If the cable core 1 is damaged, the leaked current can flow into the grounding grid along the shielding layer 24, playing a role of safety protection;

[0022] In order to effectively increase the waterproof performance of the cable, a waterproof layer 26 is arranged on the outer surface of the outer insulating layer 25, specifically including a polyethylene layer 261, the outer surface of the polyethylene layer 261 is fixedly installed on the inner surface of the corrosion-resistant layer 27, a butyl rubber layer 262 is fixedly installed on the inner surface of the polyethylene layer 261, a polytetrafluoroethylene 263 is fixedly installed on the inner surface of the butyl rubber layer 262, and the inner surface of the polytetrafluoroethylene 263 is fixedly installed on the outer surface of the outer insulating layer 25. The width of the polyethylene layer 261 ranges from four millimeters to six millimeters, the width of the butyl rubber layer 262 ranges from two millimeters to five millimeters, and the width of the polytetrafluoroethylene 263 ranges from five millimeters to eight millimeters. Through the provision of the waterproof layer 26, moisture can be effectively prevented from penetrating into the interior of the cable, ensuring that the cable can still maintain its normal function in a humid or rainy environment. This is particularly important for cables installed outdoors or underground, and can significantly extend the service life of the cable. Cables with good waterproof performance can reduce failures caused by moisture, thereby reducing the frequency and cost of maintenance and overhaul.

[0023] In order to increase the corrosion resistance of the outer insulating layer 25, a corrosion-resistant layer 27 is arranged on the outer surface of the waterproof layer 26, specifically including a chromium-containing oxide film layer 272, the inner surface of the chromium-containing oxide film layer 272 is fixedly installed on the outer surface of the polyethylene layer 261, and a titanium-zirconium conversion film layer 271 is fixedly installed on the outer surface of the chromium-containing oxide film layer 272, and the width of the titanium-zirconium conversion film layer 271 ranges from sixty microns to one hundred microns, and the width of the chromium-containing oxide film layer 272 ranges from fifty microns to one hundred and fifty microns. Through the setting of the corrosion-resistant layer 27, it can effectively resist the erosion of chemicals, humidity and other corrosive factors in the external environment, thereby extending the service life of the cable and reducing damage and maintenance costs caused by corrosion. At the same time, the outer insulating layer 25 can protect the conductor and insulating material inside the cable from corrosion, ensure that the electrical performance of the cable is stable and reliable, and reduce electrical failures and safety hazards caused by corrosion.

[0024] The working principle is as follows: when the cable core 1 is assembled, the protective layer 2 is arranged on the cable core 1 to effectively protect the cable core 1. The titanium zirconium conversion film layer 271 and the chromium oxide film layer 272 on the corrosion-resistant layer 27 cooperate with each other to effectively resist the erosion of chemicals, humidity and other corrosive factors in the external environment, thereby extending the service life of the cable and reducing damage and maintenance costs caused by corrosion. The butyl rubber layer 262 on the waterproof layer 26 cooperates with the butyl rubber layer 262 and the polytetrafluoroethylene 263 to effectively prevent moisture from penetrating into the cable, ensuring that the cable can still maintain its normal function in a humid or rainy environment, which can significantly extend the service life of the cable. Cables with good waterproof properties can reduce damage caused by moisture. Failures can be prevented, thereby reducing the frequency and cost of maintenance and overhaul. The water-blocking layer 23 is provided with a reinforcing rib composed of nylon, so that the yarn has good tensile strength and elongation. The powder containing sodium polyacrylate is evenly applied on the nylon. When the main body of the water-blocking yarn fiber meets water, it can quickly expand to form a large gel-like substance. The gel-like substance has a strong water-retaining capacity and can effectively prevent the growth of water trees, thereby preventing water from continuing to penetrate and diffuse. The shielding layer 24 is wound with copper wire, which mainly plays the role of shielding the electric field to prevent the magnetic field generated by the current from interfering with other components. At the same time, the shielding layer 24 can also play a certain grounding protection role. If the cable core 1 is damaged, the leaked current can flow into the grounding grid along the shielding layer 24, thereby playing a role of safety protection.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An axial water-blocking cable, characterized in that: The invention comprises a cable core (1), wherein a protective layer (2) is provided on the cable core (1), wherein the protective layer (2) comprises an isolation layer (21), wherein the inner surface of the isolation layer (21) contacts the outer surface of the cable core (1), wherein an inner insulating layer (22) is fixedly mounted on the outer surface of the isolation layer (21), wherein a water-blocking layer (23) is fixedly mounted on the outer surface of the inner insulating layer (22), wherein a shielding layer (24) is fixedly mounted on the outer surface of the water-blocking layer (23), wherein an outer insulating layer (25) is fixedly mounted on the outer surface of the shielding layer (24), wherein a waterproof layer (26) is fixedly mounted on the outer surface of the outer insulating layer (25), and wherein a corrosion-resistant layer (27) is fixedly mounted on the outer surface of the waterproof layer (26); The waterproof layer (26) comprises a polyethylene layer (261), the outer surface of the polyethylene layer (261) is fixedly mounted on the inner surface of the corrosion-resistant layer (27), a butyl rubber layer (262) is fixedly mounted on the inner surface of the polyethylene layer (261), polytetrafluoroethylene (263) is fixedly mounted on the inner surface of the butyl rubber layer (262), and the inner surface of the polytetrafluoroethylene (263) is fixedly mounted on the outer surface of the outer insulating layer (25).

2. An axial water-blocking cable according to claim 1, characterized in that: The water-blocking layer (23) comprises water-blocking yarn and water-blocking powder. The water-blocking yarn is made of nylon and is evenly wound on the inner insulating layer (22). The water-blocking powder is made of sodium polyacrylate and is evenly distributed on the outer surface of the water-blocking yarn.

3. The axial water-blocking cable according to claim 1, characterized in that: The shielding layer (24) is made of soft copper wires, and the distance between the copper wires is two to four millimeters.

4. The axial water-blocking cable according to claim 1, characterized in that: The width of the polyethylene layer (261) ranges from four millimeters to six millimeters, the width of the butyl rubber layer (262) ranges from two millimeters to five millimeters, and the width of the polytetrafluoroethylene (263) ranges from five millimeters to eight millimeters.

5. The axial water-blocking cable according to claim 1, characterized in that: The corrosion-resistant layer (27) comprises a chromium-containing oxide film layer (272), the inner surface of the chromium-containing oxide film layer (272) is fixedly mounted on the outer surface of the polyethylene layer (261), and the outer surface of the chromium-containing oxide film layer (272) is fixedly mounted with a titanium-zirconium conversion film layer (271).

6. The axial water-blocking cable according to claim 5, characterized in that: The width of the titanium-zirconium conversion film layer (271) ranges from 60 micrometers to 100 micrometers, and the width of the chromium-containing oxide film layer (272) ranges from 50 micrometers to 150 micrometers.

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