CN111371057A

CN111371057A - Flame-retardant power cable protection pipe

Info

Publication number: CN111371057A
Application number: CN202010273563.3A
Authority: CN
Inventors: 朱伦; 卞大成; 朱健; 刘蓉蓉
Original assignee: Jiangsu Fast Power Technology Co Ltd
Current assignee: Jiangsu Fast Power Technology Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-07-03

Abstract

The invention discloses a flame-retardant power cable protection tube which comprises a sleeve body, wherein the sleeve body is of a hollow structure, an anticorrosive coating is sprayed on the inner wall of the sleeve body, an insulating layer is coated on the outer wall of the sleeve body, a metal mesh layer is arranged on the outer side of the insulating layer, a hot melt adhesive layer is arranged between the metal mesh layer and the insulating layer, a flame-retardant layer is coated on the outer side of the metal mesh layer, and a wear-resistant coating is sprayed on the outer side of the flame-retardant layer.

Description

Flame-retardant power cable protection pipe

Technical Field

The invention relates to the technical field of electrical sleeves, in particular to a flame-retardant power cable protection pipe.

Background

With the rapid development of power cable buried laying engineering, the cable sleeve has higher requirements, and is suitable for the fields of telecommunication, power engineering, traffic, urban construction and the like. There are generally two types of casing (1) steel protective pipe. The steel protection tube has thin-wall tube and thick-wall tube and is divided into zinc plating and non-zinc plating. (2) And (3) a plastic pipe. The plastic pipe is made of polyvinyl chloride plastic or U-PVC, is common and flame-retardant, has lower price than a metal pipe, is convenient to construct and cannot rust. Most of the wire threading protective sleeves are plastic pipes. The glass fiber reinforced plastic cable conduit is formed by mechanically winding a high-strength glass fiber as a reinforcing material and unsaturated polyester resin as a base material by adopting a microcomputer control.

The current electrical sleeve for cables has certain insulation performance, but has poor insulation flame-retardant effect, poor weather resistance and short service life, so the improvement is needed.

Disclosure of Invention

The present invention is directed to a flame-retardant power cable protection tube, which solves the above problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fire-retardant power cable protection tube, includes the sleeve pipe body, the sleeve pipe body adopts hollow structure, the spraying has anticorrosive coating on the sleeve pipe body inner wall, sleeve pipe body outer wall cladding insulating layer, the insulating layer outside sets up the metal mesh layer, set up hot melt adhesive layer between metal mesh layer and the insulating layer, the fire-retardant layer of metal mesh layer outside cladding, the fire-retardant layer outside is spouted and is scribbled wear-resistant coating.

Preferably, the insulating layer comprises a first insulating film, a second insulating film, a first basalt fiber cloth, a second basalt fiber cloth and cross-linked polyethylene, the first insulating film and the second insulating film are bonded through the cross-linked polyethylene, the first basalt fiber cloth is arranged on the outer side of the first insulating film, the second basalt fiber cloth is arranged on the outer side of the second insulating film, and the first insulating film and the second insulating film are both made of low-smoke halogen-free flame-retardant insulating material films.

Preferably, the flame-retardant layer is a flame-retardant epoxy resin layer, and the thickness of the flame-retardant layer is 1mm-2 mm.

Preferably, the first basalt fiber cloth and the second basalt fiber cloth are respectively woven by warp yarns and weft yarns, the warp yarns and the weft yarns are basalt fibers, and the warp yarns and the weft yarns are woven in a mutually perpendicular mode.

Preferably, the anticorrosion coating adopts a polyolefin coating; the wear-resistant coating is made of wear-resistant ceramic paint.

Compared with the prior art, the invention has the beneficial effects that: the cable protection device has the advantages of novel structural design, excellent high temperature resistance, flame retardance, pressure resistance and deformation resistance, is not easy to damage, has long service life, and effectively protects the internal cable; the insulating layer adopted by the invention has good insulating, impact-resistant, flame-retardant, fireproof and corona-resistant performances, and the insulating performance of the electrical bushing is further prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of an insulating layer of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a flame-retardant power cable protection tube comprises a sleeve body 1, wherein the sleeve body 1 is of a hollow structure, an anticorrosive coating 2 is sprayed on the inner wall of the sleeve body 1, the outer wall of the sleeve body 1 is coated with an insulating layer 3, a metal mesh layer 4 is arranged on the outer side of the insulating layer 3, a hot melt adhesive layer 5 is arranged between the metal mesh layer 4 and the insulating layer 3, a flame-retardant layer 6 is coated on the outer side of the metal mesh layer 4, and a wear-resistant coating 7 is sprayed on the outer side of the flame-retardant layer 6; wherein, the anti-corrosion coating 2 adopts a polyolefin coating which has the performances of acid resistance, alkali resistance and corrosion resistance; the wear-resistant coating 7 is made of wear-resistant ceramic paint which has wear resistance and scratch resistance.

In the invention, the insulating layer 3 comprises a first insulating film 8, a second insulating film 9, a first basalt fiber cloth 10, a second basalt fiber cloth 11 and cross-linked polyethylene 12, the first insulating film 8 and the second insulating film 9 are bonded through the cross-linked polyethylene 12, the first basalt fiber cloth 10 is arranged outside the first insulating film 8, the second basalt fiber cloth 11 is arranged outside the second insulating film 9, and the first insulating film 8 and the second insulating film 9 are both made of low-smoke halogen-free flame-retardant insulating material films; the first basalt fiber cloth 10 and the second basalt fiber cloth 11 are respectively woven by warp yarns and weft yarns, the warp yarns and the weft yarns are basalt fibers, and the warp yarns and the weft yarns are woven in a mutually perpendicular mode. The insulating layer adopted by the invention has good insulating, impact-resistant, flame-retardant, fireproof and corona-resistant performances, and the insulating performance of the electrical casing is further prolonged.

In addition, in the invention, the flame-retardant layer 6 is a flame-retardant epoxy resin layer, and the thickness of the flame-retardant layer 6 is 1mm-2 mm. The flame-retardant epoxy resin layer can play a role in flame retardance, heat insulation and high temperature resistance.

In conclusion, the cable protection device is novel in structural design, has the advantages of excellent high temperature resistance, flame retardance, pressure resistance and deformation resistance, is not easy to damage, is long in service life, and effectively protects the internal cable; the insulating layer adopted by the invention has good insulating, impact-resistant, flame-retardant, fireproof and corona-resistant performances, and the insulating performance of the electrical bushing is further prolonged.

The invention is not described in detail, but is well known to those skilled in the art.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a fire-retardant power cable protection pipe, includes sleeve pipe body (1), its characterized in that: the sleeve pipe body (1) adopts hollow structure, the spraying has anticorrosive coating (2) on sleeve pipe body (1) inner wall, sleeve pipe body (1) outer wall cladding insulating layer (3), the insulating layer (3) outside sets up metal mesh layer (4), set up hot melt adhesive layer (5) between metal mesh layer (4) and insulating layer (3), metal mesh layer (4) outside cladding flame retardant coating (6), flame retardant coating (6) outside spraying has wear-resisting coating (7).

2. A flame retardant power cable protection tube according to claim 1, characterized in that: the insulating layer (3) comprises a first insulating film (8), a second insulating film (9), a first basalt fiber cloth (10), a second basalt fiber cloth (11) and cross-linked polyethylene (12), the first insulating film (8) and the second insulating film (9) are bonded through the cross-linked polyethylene (12), the first basalt fiber cloth (10) is arranged on the outer side of the first insulating film (8), the second basalt fiber cloth (11) is arranged on the outer side of the second insulating film (9), and the first insulating film (8) and the second insulating film (9) are both made of low-smoke halogen-free flame-retardant insulating material films.

3. A flame retardant power cable protection tube according to claim 1, characterized in that: the flame-retardant layer (6) is a flame-retardant epoxy resin layer, and the thickness of the flame-retardant layer (6) is 1-2 mm.

4. A flame retardant power cable protection tube according to claim 2, characterized in that: the basalt fiber cloth is characterized in that the first basalt fiber cloth (10) and the second basalt fiber cloth (11) are respectively formed by weaving warp yarns and weft yarns, the warp yarns and the weft yarns are basalt fibers, and the warp yarns and the weft yarns are woven in a mutually perpendicular mode.

5. A flame retardant power cable protection tube according to claim 1, characterized in that: the anticorrosive coating (2) is a polyolefin coating; the wear-resistant coating (7) is made of wear-resistant ceramic paint.