CN215577855U

CN215577855U - Multilayer flame-retardant PVC-C power cable protection tube

Info

Publication number: CN215577855U
Application number: CN202121015439.3U
Authority: CN
Inventors: 董杰建
Original assignee: Hangzhou Etone Plastic Industry Co ltd
Current assignee: Hangzhou Etone Plastic Industry Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-01-18
Anticipated expiration: 2031-05-13

Abstract

The utility model discloses a multilayer flame-retardant PVC-C power cable protection pipe, which relates to the field of cable protection pipes and comprises a PVC-C outer sleeve, wherein a silica gel partition layer is arranged in the PVC-C outer sleeve, a cable is arranged in a through hole formed by the silica gel partition layer, and an insulating fireproof structure is arranged between the cable and the silica gel partition layer. According to the utility model, the cable is subjected to primary insulation protection through the cable rubber insulation layer, the basalt fiber fireproof jacket layer is sleeved outside the cable rubber insulation layer, an object is protected from a hot fire point and a spark area through the characteristics of non-combustion and high temperature resistance of the basalt fiber fireproof jacket layer, the combustion or isolated combustion is thoroughly prevented, and the explosion and the surrounding cable after the cable deflagration can be avoided through the characteristics of high elastic modulus, chemical corrosion resistance and thermal shock resistance of the basalt fiber fireproof jacket layer.

Description

Multilayer flame-retardant PVC-C power cable protection tube

Technical Field

The utility model relates to the field of cable protection pipes, in particular to a multilayer flame-retardant PVC-C power cable protection pipe.

Background

The cable can be divided into medium and low voltage power cables, high voltage cables, ultra high voltage cables and extra high voltage cables according to voltage grades, and can be divided into alternating current cables and direct current cables according to current systems, wherein polyethylene cables and cross-linked polyethylene insulated cables with extruded plastic insulating layers are widely applied.

Common plastics include polyvinyl chloride, polyethylene and crosslinked polyethylene, the plastic cable is simple in structure, convenient to manufacture and process, light in weight, convenient to lay and install and free of laying fall limitation, electric leakage is prevented through insulating materials, and the internal cable is protected from being damaged through the strength of the plastic materials.

However, the existing plastic cable has the biggest defect of treeing breakdown phenomenon, which limits the use of the plastic cable at higher voltage, the treeing breakdown is a common aging phenomenon, the plastic cable is integrally extruded and formed, the treeing breakdown easily occurs in an integrated structure, the flame retardant capability of the plastic cable is not strong enough, and after the deflagration phenomenon occurs in a certain cable, the plastic cable easily spreads other closely attached cables, so that a larger range of power faults are caused.

SUMMERY OF THE UTILITY MODEL

Based on the technical problems, the utility model aims to provide a multilayer flame-retardant PVC-C power cable protection pipe to solve the technical problems that the existing plastic cable is easy to have treeing breakdown and is easy to spread to other closely attached cables after deflagration.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a multilayer fire-retardant type PVC-C power cable protection tube, includes PVC-C outer tube, PVC-C outer tube inside is provided with silica gel and cuts apart the layer, be provided with the cable in the via hole that silica gel cut apart the layer formation, the cable with silica gel cuts apart and is provided with insulating fire resistive construction between the layer.

Through adopting above-mentioned technical scheme, the layer is cut apart to the silica gel that sets up carries out the layering to keep apart stranded cable to protect it respectively through insulating fireproof structure.

The cable is characterized in that the insulating fireproof structure comprises a cable rubber insulating layer, a basalt fiber fireproof jacket layer and a flame-retardant filling layer, the cable rubber insulating layer is arranged outside the cable, the basalt fiber fireproof jacket layer is arranged outside the cable rubber insulating layer, and the flame-retardant filling layer is arranged among the basalt fiber fireproof jacket layer, the PVC-C outer sleeve and the silica gel cutting layer.

By adopting the technical scheme, the cable is subjected to primary insulation protection through the cable rubber insulating layer, the basalt fiber fireproof jacket layer is sleeved outside the cable rubber insulating layer, an object is protected from a hot fire point and a spark area through the characteristics of incombustibility and high temperature resistance of the basalt fiber fireproof jacket layer, and combustion or isolated combustion is thoroughly prevented, the basalt fiber fireproof jacket layer is compact in structure, free of irritation, soft in texture and flexible, the cable rubber insulating layer is conveniently wrapped, and through the characteristics of high elastic modulus, chemical corrosion resistance and thermal shock resistance of the basalt fiber fireproof jacket layer, the situation that the cable knocks and then reaches surrounding cables can be avoided, after light and micro explosion occurs, explosion fluctuation is absorbed through the basalt fiber fireproof jacket layer, and oxygen is blocked through the independent airtight interlayer formed by the silica gel partition layer, so that self-extinguishing is realized.

The utility model is further provided that the flame-retardant filling layer is an asbestos filler.

By adopting the technical scheme, when stronger deflagration occurs and the basalt fiber fireproof jacket layer is damaged, the fireproof basalt fiber fireproof jacket layer is subjected to flame retardance through the asbestos filler, so that the damage of the basalt fiber fireproof jacket layer to other cables is slowed down as much as possible, and other cables are protected.

In summary, the utility model mainly has the following beneficial effects:

1. the utility model carries out primary insulation protection on the cable through the cable rubber insulating layer, and the basalt fiber fireproof jacket layer is sleeved outside the cable rubber insulating layer, the basalt fiber fireproof jacket layer is non-inflammable and high temperature resistant to protect objects from being far away from a hot fire point and a spark area, and thoroughly prevents combustion or isolates combustion, and the basalt fiber fireproof jacket layer has compact structure, no irritation, soft texture and toughness, is convenient to wrap the cable rubber insulating layer, and can avoid the explosion fluctuation of the cable after explosion through the characteristics of high elastic modulus, chemical corrosion resistance and thermal shock resistance, and the oxygen is blocked through the independent airtight interlayer formed by the silica gel partition layer after light micro explosion occurs, thereby realizing self-extinguishing, when strong explosion occurs and the basalt fiber fireproof jacket layer is damaged, the asbestos filler is used for retarding flame, so that the damage of the asbestos filler to other cables is relieved as much as possible, and other cables are protected;

2. according to the utility model, the protective layer is divided into a plurality of layers through the silica gel dividing layer, the basalt fiber fireproof sleeve layer, the cable rubber insulating layer and the asbestos filler, so that the treeing breakdown speed of the PVC-C outer sleeve on the outermost side is slowed down.

Drawings

FIG. 1 is a structural cross-sectional view of the present invention;

FIG. 2 is an enlarged view of detail A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the main body of the present invention;

fig. 4 is an enlarged view of detail B of fig. 3 according to the present invention.

In the figure: 1. PVC-C outer sleeve; 2. partitioning the layer by silica gel; 3. a basalt fiber fireproof jacket layer; 4. a cable rubber insulation layer; 5. a cable; 6. an asbestos filler.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following describes an embodiment of the present invention based on its overall structure.

The utility model provides a layer 2 is cut apart to multilayer fire-retardant type PVC-C power cable protection tube, as shown in fig. 2 and fig. 4, including PVC-C outer tube 1, PVC-C outer tube 1 is inside to be provided with silica gel, cuts apart the independent airtight interlayer that layer 2 formed through silica gel, blocks oxygen to cable 5 to realize slight detonation self-extinguishment, is provided with cable 5 in the via hole that layer 2 formed is cut apart to silica gel, and cable 5 and silica gel are cut apart and are provided with insulating fire resistive construction between layer 2, protect it respectively through insulating fire resistive construction.

Referring to fig. 2 and 4, the insulating fireproof structure includes a cable rubber insulating layer 4, a basalt fiber fireproof jacket layer 3 and a flame retardant filling layer, the cable rubber insulating layer 4 is disposed outside the cable 5, the cable 5 is primarily insulated and protected by the cable rubber insulating layer 4, the basalt fiber fireproof jacket layer 3 is sleeved outside the cable rubber insulating layer 4, the basalt fiber fireproof jacket layer 3 is disposed outside the cable rubber insulating layer 4, the basalt fiber fireproof jacket layer 3 is non-combustible and high temperature resistant, and protects objects from a hot fire point and a spark zone, and completely prevents combustion or isolates combustion, and the basalt fiber fireproof jacket layer 3 has a compact structure, is non-irritant, soft and tough, is convenient to wrap the cable rubber insulating layer 4, and can prevent the cable 5 from being exposed to surrounding cables 5 after deflagration due to the characteristics of high modulus, chemical corrosion resistance and thermal shock resistance, after light and micro explosion occurs, explosion fluctuation is absorbed by the basalt fiber fireproof jacket layer 3, and a flame-retardant filling layer is arranged between the basalt fiber fireproof jacket layer 3 and the PVC-C outer sleeve 1 and between the basalt fiber fireproof jacket layer and the silica gel cutting layer 2.

Referring to fig. 2 and 4, the flame-retardant filling layer is made of asbestos filler 6, and when strong deflagration occurs and damages the basalt fiber fireproof jacket layer 3, the asbestos filler 6 is used for flame-retardant, so that damage to other cables is reduced as much as possible, and other cables 5 are protected.

The working principle of the utility model is as follows: the cable 5 is primarily insulated and protected by the cable rubber insulating layer 4, the basalt fiber fireproof jacket layer 3 is sleeved outside the cable rubber insulating layer 4, objects are protected from a hot fire point and a spark area by the characteristics of non-combustibility and high temperature resistance of the basalt fiber fireproof jacket layer 3, and the combustion or the isolated combustion is thoroughly prevented, the basalt fiber fireproof jacket layer 3 is compact in structure, non-irritant, soft in texture and flexible, the cable rubber insulating layer 4 is conveniently wrapped, and the cable 5 can be prevented from being subjected to deflagration back wave and surrounding cables 5 by the characteristics of high elastic modulus, chemical corrosion resistance and thermal shock resistance, after light and micro-detonation occurs, the explosion wave is absorbed by the basalt fiber fireproof jacket layer 3, and oxygen is blocked by an independent airtight interlayer formed by the silica gel partition layer 2, so that self-extinguishing is realized, when strong deflagration occurs and the basalt fiber fireproof jacket layer 3 is damaged, the fireproof cable is flame-retardant through the asbestos filler 6, the damage to other cables is slowed down as much as possible, so that other cables 5 are protected, and the protective layer is divided into multiple layers through the silica gel dividing layer 2, the basalt fiber fireproof sleeve layer 3, the cable rubber insulating layer 4 and the asbestos filler 6, so that the treeing breakdown speed of the PVC-C outer sleeve 1 at the outermost side is slowed down.

Although embodiments of the present invention have been shown and described, the present embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and those skilled in the art can make modifications, substitutions, variations, etc. of the embodiments as required without departing from the principle and spirit of the present invention, but within the scope of the claims of the present invention.

Claims

1. The utility model provides a multilayer fire-retardant type PVC-C power cable protection tube, includes PVC-C outer tube (1), its characterized in that: PVC-C outer tube (1) is inside to be provided with silica gel and to cut apart layer (2), silica gel is cut apart and is provided with cable (5) in the via hole that layer (2) formed, cable (5) with silica gel is cut apart and is provided with insulating fire resistive construction between layer (2).

2. The protective tube for a multilayer flame-retardant PVC-C power cable according to claim 1, wherein: the insulating fireproof structure is characterized in that the insulating fireproof structure is a cable rubber insulating layer (4), a basalt fiber fireproof jacket layer (3) and a flame-retardant filling layer, the cable rubber insulating layer (4) is arranged on the outer side of the cable (5), the basalt fiber fireproof jacket layer (3) is arranged on the outer side of the cable rubber insulating layer (4), and the flame-retardant filling layer is arranged between the basalt fiber fireproof jacket layer (3) and the PVC-C outer sleeve (1) and between the basalt fiber fireproof jacket layer and the silica gel cutting layer (2).

3. The protective tube for a multilayer flame-retardant PVC-C power cable according to claim 2, wherein: the flame-retardant filling layer is made of asbestos filler (6).