CN217280196U

CN217280196U - Low-smoke halogen-free flame-retardant fire-resistant cable

Info

Publication number: CN217280196U
Application number: CN202221291328.XU
Authority: CN
Inventors: 李兵; 朱峰林; 何军军; 叶娟
Original assignee: Anhui Lingyu Cable Technology Co Ltd
Current assignee: Anhui Lingyu Cable Technology Co Ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-08-23
Anticipated expiration: 2032-05-26

Abstract

The utility model discloses a fire-retardant fire resisting cable of low smoke and zero halogen, it includes oversheath layer, heat conduction silica gel protection seat, sinle silk layer group and the fine rope filling layer of fire-retardant glass, wherein, the space department between oversheath layer and heat conduction silica gel protection seat is filled to fire-retardant glass fine rope filling layer, heat conduction silica gel protection seat includes: the cylinder is arranged at the center inside the outer sheath layer; the T-shaped supporting strips are distributed at equal intervals along the circumferential direction of the cylinder, and the T-shaped cross strips extend to the inner part of the outer sheath layer; and the wire arrangement grooves are distributed at equal intervals along the circumferential direction of the cylinder and are positioned between two adjacent T-shaped support bars. The utility model discloses a mutually support between cylinder and the preformed groove and make the cable cushion when being extruded, reduce the extrusion of the inside power sinle silk of cable, improve life, the heat conduction that gives off power sinle silk that T shape support bar can be quick simultaneously is to the oversheath layer on, convenient quick heat dissipation.

Description

Low-smoke halogen-free flame-retardant fire-resistant cable

Technical Field

The utility model relates to the technical field of cables, specifically be fire-retardant fire resisting cable of low smoke and zero halogen.

Background

The cable is generally made of one or more conductors insulated from each other and a conductive wire covering an insulating protective layer to transmit power or information from one place to another, and the existing cables may be classified into various types including flame-retardant cables, etc. according to their properties.

Because the cable is at the in-process of using, the produced heat of power sinle silk is very high, but generally will carry out next door to the cable through the insulating layer in current cable, even there is the heat dispersion that carries out radiating generally all through material self in the layer to the cable to dispel the heat, can't carry out the conduction with the produced heat of power sinle silk, the radiating effect is poor, generally all utilize the connectivity between the material to wrap up through crowded package between layer and the layer simultaneously, there is the air in the inside easily, thereby electricity and air production electric arc in the use, cause the short circuit easily, consequently, design a low smoke and zero halogen fire-retardant fire resisting cable.

SUMMERY OF THE UTILITY MODEL

Defect or not enough to the cable existence, the utility model aims to provide a fire-retardant fire resisting cable of low smoke and zero halogen makes the cable cushion when being extruded through mutually supporting between cylinder and the preformed groove, reduces the extrusion of the inside power sinle silk of cable, improves life, and the T shape support bar can be quick simultaneously with the heat conduction that the power sinle silk gived off to the oversheath layer on, convenient quick heat dissipation.

In order to realize the practical purpose, the utility model adopts the following technical scheme:

the utility model provides a fire-retardant fire resisting cable of low smoke and zero halogen, including oversheath layer, heat conduction silica gel protection seat, sinle silk layer group and the fine rope filling layer of fire-retardant glass, wherein, the sinle silk layer group is from interior to exterior to carrying out the cladding combination to the power sinle silk in proper order through insulating layer, fire-resistant oxygen layer and interior inoxidizing coating and forms, the fine rope filling layer of fire-retardant glass fills space department between oversheath layer and heat conduction silica gel protection seat, its characterized in that: the heat conduction silica gel protection seat includes:

the cylinder is arranged at the center position inside the outer sheath layer, and a reserved groove is formed in the center position;

the T-shaped supporting strips are distributed at equal intervals along the circumferential direction of the cylinder, the T-shaped transverse strips of the T-shaped supporting strips extend into the outer sheath layer, and through holes II for enabling the flame-retardant glass fiber rope filling layer to flow through to increase the connectivity are uniformly formed in the T-shaped vertical strips;

the wire laying grooves are distributed at equal intervals in the circumferential direction of the cylinder and are positioned between the adjacent T-shaped supporting strips, and a notch which is distributed along the length direction and used for placing a wire core layer group is formed in the side wall of the wire laying grooves far away from the cylinder.

Preferably, through holes I for increasing connectivity are formed in the side wall of the wire arrangement groove at equal intervals along the length direction of the wire arrangement groove.

Preferably, the outer sheath layer is formed by extruding and wrapping a low-smoke halogen-free flame-retardant polyvinyl chloride material.

Preferably, the outer side surface of the outer sheath layer at the position corresponding to the T-shaped cross bar of the T-shaped support bar is provided with a concave part.

Preferably, the fire-resistant oxygen-insulating layer is formed by extruding and wrapping a high-flame-retardant oxygen-insulating material.

Preferably, the insulating layer is formed by extruding and wrapping low-smoke halogen-free flame-retardant irradiation cross-linked polyolefin materials.

Compared with the prior art, the above one or more technical schemes have the following beneficial effects:

1. the utility model selects the heat-conducting silica gel to reduce the thermal contact resistance generated between the outer sheath layer and the fire-retardant glass fiber rope filling layer and the core layer group, so that the heat-conducting silica gel can well fill the gap of the contact surface; meanwhile, air is a poor heat conductor and can seriously hinder heat transfer between the contact surfaces, and the heat-conducting silica gel sheet is additionally arranged between the wire core layer group and other layers to extrude the air out of the contact surfaces, so that electric arcs generated by the contact of the air and the wire core layer group are avoided; meanwhile, the heat-conducting silica gel sheet has insulating property.

2. The utility model discloses a mutually support between through cylinder and the preformed groove and make the cable cushion when being extruded, reduce the extrusion of the inside power sinle silk of cable, and service life is prolonged, the T shape support bar can be quick conduct the heat that gives off the power sinle silk to the oversheath layer on simultaneously, make things convenient for quick heat dissipation, place the inside at the unwrapping wire groove through the opening with sinle silk layer group simultaneously, make between the unwrapping wire groove and the sinle silk layer group closely contact, simultaneously in the use fire-retardant glass fine rope filling layer and the heat conduction silica gel connection between the protection seat strong, high durability and convenient use.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention, and together with the description, serve to explain the invention and not to limit the scope of the invention.

FIG. 1 is a schematic perspective view of the overall right view;

FIG. 2 is a schematic perspective view of the entire left view;

FIG. 3 is a schematic view of the overall cross-sectional structure;

FIG. 4 is a schematic perspective view of a heat-conducting silicone protective seat;

in the figure:

100. an outer jacket layer; 101. a recessed portion;

200. a heat-conducting silica gel protective seat; 201. reserving a groove; 202. a wire discharging groove; 203. a T-shaped support bar; 204. opening; 205. a first through hole; 206. a second through hole; 207. a cylinder;

300. a wire core layer group; 301. an inner protective layer; 302. a refractory oxygen barrier layer; 303. an insulating layer;

400. fire-retardant glass fiber rope filling layer.

Detailed Description

The present invention will be further described with reference to the following drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Examples

As shown in fig. 1-4, fire-retardant fire resisting cable of low smoke and zero halogen, including oversheath layer 100, heat conduction silica gel protection seat 200, sinle silk layer group 300 and the fine rope filling layer 400 of fire-retardant glass, wherein, sinle silk layer group 300 is from interior to exterior through insulating layer 303, fire-resistant oxygen layer 302 and interior inoxidizing coating 301 carry out the cladding combination to the power sinle silk in proper order and form, and fire-retardant glass fine rope filling layer 400 is filled in the space department between oversheath layer 100 and heat conduction silica gel protection seat 200, and heat conduction silica gel protection seat 200 includes:

in this embodiment, please refer to fig. 4 again, the cylinder 207 is disposed at the central position inside the outer sheath layer 100, and the preformed groove 201 is disposed at the central position, and through the mutual cooperation between the cylinder 207 and the preformed groove 201, when the cable is pre-buried underground, the cable is easily deformed by extrusion during driving of a vehicle, so that the cable is damaged, and the cable is buffered by the flexibility of the heat-conducting silica gel protective seat 200 while passing through the preformed groove 201, so as to reduce extrusion of a power wire core inside the cable and improve service life;

in this embodiment, please refer to fig. 4, the T-shaped supporting bars 203 are distributed at equal intervals along the circumferential direction of the cylinder 207, and the T-shaped cross bars extend into the outer sheath layer 100, the heat absorbed by the heat-conducting silica gel protective base 200 is conducted to the outside of the cable through the T-shaped supporting bars 203, so that when the cable is pre-buried underground, the heat emitted by the power wire core can be quickly conducted to the outer sheath layer 100, and then the heat emitted by the power wire core is absorbed by the underground low temperature, so as to facilitate and quickly dissipate heat, and meanwhile, when the cable is hung in the air through a wire pole, the heat absorbed by the heat-conducting silica gel protective base 200 is conducted to the outside of the cable through the T-shaped supporting bars 203, although the heat is discharged by wind, the heat dissipation effect is good, and the T-shaped vertical bars are uniformly provided with two through holes 206 for enabling the flame-retardant rope filling layer 400 to flow through and increase connectivity, through the arrangement of the second through hole 206, in the process of filling the flame-retardant glass fiber rope filling layer 400, the connectivity between two adjacent T-shaped supporting strips 203 is increased, meanwhile, the connectivity between the flame-retardant glass fiber rope filling layer 400 and the heat-conducting silica gel protective seat 200 is conveniently increased, and the use is convenient;

in this embodiment, please refer to fig. 4 again, the paying-off slots 202 are distributed at equal intervals along the circumferential direction of the cylinder 207, are located between two adjacent T-shaped supporting bars 203, and are provided with a gap 204 distributed along the length direction on the side wall away from the cylinder 207 for placing the core layer group 300, and the core layer group 300 is placed inside the paying-off slot 202 through the gap 204, so that the paying-off slot 202 and the core layer group 300 are closely connected.

In this embodiment, set up a through-hole 205 that is used for increasing the connectivity along its length direction equidistant on the lateral wall of unwrapping wire groove 202, make fire-retardant glass fine rope filling layer 400 at the in-process of filling through-hole 205 inside entering through-hole 205 to further increase the connectivity between heat conduction silica gel protection seat 200 and the fire-retardant glass fine rope filling layer 400, increase the connectivity between sinle silk layer group 300 and the fire-retardant glass fine rope filling layer 400 in step.

In this embodiment, the outer sheath layer 100 is formed by extruding a low-smoke halogen-free flame-retardant polyvinyl chloride material.

In this embodiment, the outer jacket layer 100 lateral surface of T-shaped support strip 203 "T" shape horizontal bar corresponding position department is provided with depressed part 101, is convenient for dispel the heat the use in the design through depressed part 101 on the one hand, and on the other hand plays certain anti-skidding effect when the people goes to stimulate the cable through the hand.

In this embodiment, the fire-resistant oxygen barrier layer 302 is extruded with a high flame-retardant oxygen barrier material.

In this embodiment, the insulating layer 303 is formed by extruding a low-smoke halogen-free flame-retardant irradiation cross-linked polyolefin material.

In this embodiment, the heat-conducting silica gel protective seat 200 is made of a heat-conducting silica gel material, and the heat-conducting silica gel is selected to reduce thermal contact resistance generated between the outer sheath layer 100 and the flame-retardant glass fiber rope filling layer 400 and the core layer group 300, so that the heat-conducting silica gel can well fill gaps of contact surfaces; meanwhile, air is a poor heat conductor, so that heat transfer between contact surfaces is seriously hindered, and the air can be extruded out of the contact surfaces by additionally arranging the heat-conducting silica gel sheet between the wire core layer group 300 and other layers, so that electric arcs generated by the contact of the air and the wire core layer group 300 are avoided; meanwhile, the heat-conducting silica gel sheet has insulating property.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Fire-retardant fire resisting cable of low smoke and zero halogen, including oversheath layer (100), heat conduction silica gel protection seat (200), sinle silk layer group (300) and fire-retardant glass fine rope filling layer (400), wherein, sinle silk layer group (300) is that from interior to exterior carries out the cladding combination to the power sinle silk in proper order through insulating layer (303), fire-resistant oxygen layer (302) and interior inoxidizing coating (301) and forms, fire-retardant glass fine rope filling layer (400) are filled in the space department between oversheath layer (100) and heat conduction silica gel protection seat (200), its characterized in that: the heat-conductive silicone rubber protective seat (200) comprises:

the cylinder (207) is arranged at the center position inside the outer sheath layer (100), and a reserved groove (201) is formed in the center position;

the T-shaped supporting strips (203) are distributed at equal intervals along the circumferential direction of the cylinder (207), the T-shaped transverse strips of the T-shaped supporting strips extend to the inner part of the outer sheath layer (100), and through holes (206) for enabling the flame-retardant glass fiber rope filling layer (400) to flow through and increasing connectivity are uniformly formed in the T-shaped vertical strips;

the wire laying grooves (202) are distributed at equal intervals in the circumferential direction of the cylinder (207), are positioned between two adjacent T-shaped supporting strips (203), and are provided with gaps (204) distributed in the length direction and used for placing a wire core layer group (300) on the side wall of the wire laying grooves far away from the cylinder (207).

2. The low smoke, zero halogen, flame retardant and fire resistant cable of claim 1, wherein: through holes I (205) for increasing connectivity are formed in the side wall of the wire placing groove (202) at equal intervals along the length direction of the wire placing groove.

3. The low smoke, zero halogen, flame retardant and fire resistant cable of claim 1, wherein: the outer sheath layer (100) is formed by extruding and wrapping low-smoke halogen-free flame-retardant polyvinyl chloride materials.

4. The low smoke, zero halogen, flame retardant and fire resistant cable of claim 1, characterized in that: the outer side surface of the outer sheath layer (100) at the position corresponding to the T-shaped cross bar of the T-shaped support bar (203) is provided with a concave part (101).

5. The low smoke, zero halogen, flame retardant and fire resistant cable of claim 1, wherein: the fire-resistant oxygen-isolating layer (302) is formed by extruding and wrapping high-fire-resistant oxygen-isolating materials.

6. The low smoke, zero halogen, flame retardant and fire resistant cable of claim 1, wherein: the insulating layer (303) is formed by extruding and wrapping low-smoke halogen-free flame-retardant irradiation cross-linked polyolefin materials.