A sheath structure for cable

Abstract

The utility model belongs to the technical field of cable accessories, and specifically relates to a sheath structure for a cable, comprising a sheath body and a protective shell arranged outside the sheath body, the sheath body comprising an outer layer and a central connecting piece arranged inside the outer layer, the central connecting piece is provided with supporting ribs along the circumferential direction, so that a plurality of line cavities are formed between the supporting ribs and the outer layer, the inner surface of the line cavity is provided with an anti-ultraviolet layer, a fireproof layer, an insulating layer, and an anti-skid layer in sequence from the inside to the outside, the protective shell comprises two protective plates with a semicircular structure in radial cross section, the protective plates are butt-jointed to form a cylindrical structure, air holes are distributed on the protective plates, supporting ribs are arranged inside the sheath body to form a line cavity, the strength of the sheath body is improved, and the cable is isolated and fixed, the anti-skid layer and the convex ribs are provided to increase the friction coefficient of the inner wall of the sheath, and prevent the cable from slipping off.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable accessories, and in particular relates to a sheath structure for a cable. Background Art

[0002] The structure of the cable is generally a metal core wrapped with an insulating layer. The main function of the insulating layer is to prevent leakage. However, after long-term use, the insulating layer on the outside of the cable will be damaged due to wear, posing a safety hazard. According to different cable laying environments, the prior art provides a variety of solutions, such as laying a pipeline and passing the cable through the pipeline, wrapping the cable with wear-resistant materials, etc. However, regardless of the prior art, the protective sheath of the cable still has shortcomings, such as a cable sheath provided by publication number CN104681151A. When laying cables of various specifications, the cables cannot be separated, and the inner wall of the outer insulating sheath of the cable in the prior art is relatively smooth, making it easy for the internal cable data line to slide in the sheath, so that the cable cannot be fixed, and it is easy to slip off or entangle inside.

[0003] Therefore, the above problems should be considered and solved in the process of cable sheath design and production. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a sheath structure for a cable, which solves the problems in the prior art that the sheath has single performance and the inner wall of the sheath is too slippery, causing the internal cable data line to slide easily in the sheath and become unstable.

[0005] The specific technical scheme of the utility model is as follows: The utility model provides a sheath structure for a cable, comprising a sheath body and a protective shell arranged outside the sheath body, the sheath body comprising an outer layer and a central connecting piece arranged inside the outer layer, the central connecting piece is provided with supporting ribs along the circumferential direction, so that a plurality of line cavities are formed between the supporting ribs and the outer layer, the inner surface of the line cavity is provided with an anti-ultraviolet layer, a fireproof layer, an insulating layer, and an anti-slip layer from the inside to the outside, the protective shell comprises two protective plates with a semicircular structure in radial cross section, the protective plates are butt-jointed to form a cylindrical structure, and air holes are evenly distributed on the protective plates.

[0006] A further improvement of the utility model is that: corresponding convex strips are provided on the outer periphery of the central connecting piece and the inner periphery of the outer surface layer, and grooves adapted to the convex strips are provided on both sides of the supporting ribs.

[0007] A further improvement of the utility model is that the fireproof layer is composed of a plurality of fireproof belts with circular cross sections.

[0008] A further improvement of the utility model is that a rubber gasket is provided on the inner surface of the protective plate through an adhesive, and glass wool is provided on the inner surface of the rubber gasket.

[0009] A further improvement of the utility model is that the two protective plates are connected by a wedge block and a wedge groove structure, and the two ends of the protective shell are fastened by clamps.

[0010] A further improvement of the utility model is that the insulating layer is a ceramic fiber layer containing graphite particles, and the outer layer is a polyethylene layer.

[0011] A further improvement of the utility model is that at least three convex ribs are equidistantly arranged on the inner wall of the anti-slip layer along the length direction, and the anti-slip layer and the convex ribs are integrally formed.

[0012] A further improvement of the utility model is that the surface of the outer layer is also coated with a flame retardant layer.

[0013] The beneficial effects of the utility model are as follows: its structure is simple, and supporting ribs are arranged inside the sheath body to form a wire cavity, which can effectively improve the strength of the sheath body on the one hand, and isolate and fix the cable in the wire cavity on the other hand; the anti-slip layer and convex ribs can increase the friction coefficient of the inner wall of the sheath, thereby effectively preventing relative sliding between the sheath and the internal core wire, and preventing the cable from slipping off; and the sheath body has excellent fire resistance, insulation and strong UV protection, so that the cable can work at high temperature for a long time; a protective shell is arranged outside the sheath body, which improves the adaptability of the cable in various harsh environments and prevents the cable from bending or damage; the air vents can dissipate heat for the cable, effectively prolonging its service life, improving the safety of the cable, and facilitating its promotion to the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the sheath body of the utility model;

[0015] Figure 2 It is a schematic diagram of the protective shell structure in the utility model;

[0016] Figure 3 This is a schematic diagram of the connection between the sheath body and the protective shell in the utility model;

[0017] Figure 4 This is a schematic diagram of the connection of the supporting ribs in the utility model;

[0018] Figure 5 It is a schematic diagram of the fireproof layer in the utility model;

[0019] Figure 6 It is a schematic cross-sectional view of the protective plate in the utility model;

[0020] Among them, 1-sheath body, 2-protective shell, 3-outer layer, 4-center connector, 5-support ribs, 6-wire cavity, 7-convex strips, 8-slots, 9-flame retardant layer, 10-anti-ultraviolet layer, 11-fireproof layer, 12-insulating layer, 13-anti-slip layer, 14-fireproof belt, 15-convex ribs, 16-protective plate, 17-ventilation hole, 18-wedge block, 19-wedge groove, 20-clamp, 21-rubber gasket, 22-glass wool. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection.

[0022] The present embodiment provides a sheath structure for a cable, comprising a sheath body 1 and a protective shell 2 arranged outside the sheath body 1, the sheath body 1 comprising an outer layer 3 and a central connector 4 arranged inside the outer layer 3, the central connector 4 being provided with supporting ribs 5 along the circumferential direction, so that a plurality of line cavities 6 are formed between the supporting ribs 5 and the outer layer 3, the outer periphery of the central connector 4 and the inner periphery of the outer layer 3 being provided with corresponding convex strips 7, and both sides of the supporting ribs 5 being provided with card grooves 8 adapted to the convex strips 7, by arranging the supporting ribs 5 inside the sheath body 1, good extensibility can be provided for the cable, and the cable can be prevented from being broken due to external pressure, and the formed line cavity 6 can isolate and fix cables of various specifications, so as to prevent the cables from moving and causing cable entanglement. The surface of the outer layer 3 is also coated with a flame retardant layer 9, and the inner surface of the outer layer 3 is provided with an anti-ultraviolet layer 10, a fireproof layer 11, an insulating layer 12, and an anti-slip layer 13 from the inside to the outside. The insulating layer 12 is a ceramic fiber layer containing graphite particles to ensure its insulation. The outer layer 3 is a polyethylene layer, and the fireproof layer 11 is composed of a number of fireproof belts 14 with circular cross-sections, thereby improving the fire resistance of the sheath body. The inner wall of the anti-slip layer 13 is provided with three convex ribs 15 equidistantly along the length direction. The anti-slip layer 13 and the convex ribs 15 are integrally formed. The anti-slip layer 13 and the convex ribs 15 can increase the friction coefficient of the inner wall of the sheath, thereby effectively preventing relative sliding between the sheath and the internal core wire, and preventing the cable from slipping.

[0023] The protective shell 2 includes two protective plates 16 with a semicircular radial cross-section. The protective plates 16 are evenly distributed with air holes 17. The air holes 17 can dissipate heat for the cable, thereby improving the safety of the cable. The protective plates 17 are butt-jointed to form a cylindrical structure. The two protective plates 17 are connected by a wedge block 18 and a wedge groove 19. The two ends of the protective shell 2 are fastened by clamps 20 to ensure their tightness. By setting up the protective shell, a protective effect can be provided between the sheath body and the wall and other places, thereby avoiding wear and tear on the cable and extending the service life of the cable. The inner surface of the protective plate 16 is provided with a rubber gasket 21 by an adhesive, and the inner surface of the rubber gasket 21 is provided with glass wool 22, which improves the friction between the sheath body 1 and the protective shell 2 and makes the connection between the two more stable.

[0024] The above are only preferred feasible embodiments of the present invention and are not limitations of the present invention. The present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A sheath structure for a cable, characterized in that: The invention comprises a sheath body and a protective shell arranged outside the sheath body, the sheath body comprises an outer layer and a central connecting piece arranged inside the outer layer, the central connecting piece is provided with supporting ribs along the circumferential direction, so that a plurality of line cavities are formed between the supporting ribs and the outer layer, the inner surface of the line cavity is provided with an anti-ultraviolet layer, a fireproof layer, an insulating layer and an anti-slip layer in sequence from the inside to the outside, the protective shell comprises two protective plates with a semicircular structure in radial cross section, the protective plates are butt-jointed to form a cylindrical structure, and the protective plates are evenly distributed with air holes.

2. A cable sheath structure according to claim 1, characterized in that: The outer periphery of the central connecting piece and the inner periphery of the outer surface layer are provided with corresponding convex strips, and both sides of the supporting ribs are provided with slots adapted to the convex strips.

3. A cable sheath structure according to claim 1, characterized in that: The fireproof layer is composed of a plurality of fireproof belts with circular cross sections.

4. A cable sheath structure according to claim 1, characterized in that: The inner surface of the protective plate is provided with a rubber gasket via an adhesive, and the inner surface of the rubber gasket is provided with glass wool.

5. The cable sheath structure according to claim 1, characterized in that: The two protective plates are connected by a wedge block and a wedge groove structure, and the two ends of the protective shell are fastened by clamps.

6. A cable sheath structure according to claim 1, characterized in that: The insulating layer is a ceramic fiber layer containing graphite particles, and the outer layer is a polyethylene layer.

7. A cable sheath structure according to claim 1, characterized in that: The inner wall of the anti-slip layer is provided with at least three convex ribs at equal intervals along the length direction, and the anti-slip layer and the convex ribs are integrally formed.

8. The cable sheath structure according to claim 1, characterized in that: The surface of the outer layer is also coated with a flame retardant layer.

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