CN219575221U

CN219575221U - Breakdown-preventing fireproof cable

Info

Publication number: CN219575221U
Application number: CN202320311088.3U
Authority: CN
Inventors: 王晓军; 杜耀杰; 尚红旗; 谭森森; 晏海洋
Original assignee: Hubei Baoshang Electric Cable Co ltd
Current assignee: Hubei Baoshang Electric Cable Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-08-22
Anticipated expiration: 2033-02-24

Abstract

The utility model provides a prevent puncturing fireproof cable, includes sinle silk, mineral substance insulating layer, crosslinked polyethylene layer, flame retardant clay filling layer and outer sheath from inside to outside in proper order, after the cabling, is equipped with the polyethylene layer that is used for waterproof at crosslinked polyethylene layer's surface. The utility model provides a breakdown-proof fireproof cable, which is characterized in that a layer of polyethylene is coated outside a crosslinked polyethylene layer with sand holes, so that the effect of preventing moisture in fire clay from penetrating into a wire core is achieved; during extrusion, the inside of the polyethylene layer is pumped, so that the vacuum pumping effect is achieved, and the polyethylene layer can be tightly coated on the surface of the crosslinked polyethylene.

Description

Breakdown-preventing fireproof cable

Technical Field

The utility model relates to the technical field of cable production, in particular to a breakdown-proof fireproof cable.

Background

The existing BBTRZ cable is shown in fig. 1, and sequentially comprises a wire core 1, a mineral insulating layer 2, a crosslinked polyethylene layer 3, a fire clay filling layer 4 and an outer protective layer from inside to outside. Because BBTRZ cable needs to satisfy the fire prevention demand, so mineral substance insulating layer 2 adopts the mica to wind the band mostly, and there is the burr on the surface of mica around the band, and the burr can lead to there is a lot of sand holes on the surface of crosslinked polyethylene layer when extruding crosslinked polyethylene layer 3, and the fire clay filling layer is the wet material that contains moisture again, and the moisture can be followed sand hole infiltration to sinle silk 1 department, leads to short circuit, puncture.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a breakdown-proof fireproof cable, which prevents moisture in fire clay from penetrating into a cable core.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a prevent puncturing fireproof cable, includes sinle silk, mineral substance insulating layer, crosslinked polyethylene layer, flame retardant clay filling layer and outer sheath from inside to outside in proper order, after the cabling, is equipped with the polyethylene layer that is used for waterproof at crosslinked polyethylene layer's surface.

Preferably, the polyethylene layer is tightly coated on the surface of the crosslinked polyethylene layer in a form of vacuumizing after extrusion.

Preferably, the outer sheath comprises a mineral isolation layer and an outer sheath.

The utility model provides a breakdown-proof fireproof cable, which is characterized in that a layer of polyethylene is coated outside a crosslinked polyethylene layer with sand holes, so that the effect of preventing moisture in fire clay from penetrating into a wire core is achieved; during extrusion, the inside of the polyethylene layer is pumped, so that the vacuum pumping effect is achieved, and the polyethylene layer can be tightly coated on the surface of the crosslinked polyethylene.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of a prior art structure;

fig. 2 is a schematic structural view of the present utility model.

Detailed Description

As shown in fig. 2, the puncture-proof fireproof cable sequentially comprises a cable core 1, a mineral insulating layer 2, a crosslinked polyethylene layer 3, a fire clay filling layer 4 and an outer protective layer from inside to outside, wherein after the cable is formed, a polyethylene layer 5 for water resistance is arranged on the surface of the crosslinked polyethylene layer 3.

Preferably, the polyethylene layer 5 is tightly coated on the surface of the crosslinked polyethylene layer 3 in a form of vacuumizing after being extruded.

Preferably, the outer sheath comprises a mineral isolation layer 6 and an outer sheath 7.

The utility model extrudes a layer of polyethylene outside the crosslinked polyethylene, has good compatibility between the crosslinked polyethylene and the crosslinked polyethylene, has no sand holes and burrs, and can effectively prevent the water in the fire clay from penetrating.

The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.

Claims

1. Breakdown-preventing fireproof cable sequentially comprises a cable core (1), a mineral insulating layer (2), a crosslinked polyethylene layer (3), a fire clay filling layer (4) and an outer protective layer from inside to outside, and is characterized in that: after cabling, a polyethylene layer (5) for waterproofing is arranged on the surface of the crosslinked polyethylene layer (3).

2. The puncture-resistant and fire-resistant cable of claim 1, wherein: and the polyethylene layer (5) is tightly coated on the surface of the crosslinked polyethylene layer (3) in a vacuumizing mode after being extruded.

3. The puncture-resistant and fire-resistant cable of claim 1, wherein: the outer sheath comprises a mineral isolation layer (6) and an outer sheath (7).