CN210073399U

CN210073399U - Isolated form inorganic mineral insulated cable

Info

Publication number: CN210073399U
Application number: CN201921172508.4U
Authority: CN
Inventors: 吴英俊; 侯映霞
Original assignee: Pearl River Legendary Cable Guangzhou Co Ltd
Current assignee: Guangdong licable Technology Co.,Ltd.
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-02-14
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses an isolated inorganic mineral insulated cable, which comprises a triangular mineral substance isolation frame, wherein a plurality of groups of cable conductors are arranged inside the mineral substance isolation frame; the outer wall of the cable conductor is wrapped by a low-smoke halogen-free insulating sleeve; a foaming layer is filled between the low-smoke halogen-free insulating sleeve and the mineral substance isolating frame; a flame-retardant layer is arranged on the periphery of the mineral substance isolation frame; three edges of the mineral substance isolation frame are internally tangent to the inner side wall of the flame retardant layer; a mineral isolating layer is filled between the mineral isolating frame and the flame-retardant layer; a metal layer is arranged on the outer side of the flame-retardant layer; and a low-smoke halogen-free sheath is arranged on the outer side of the metal layer. The utility model discloses mineral substance isolation frame and mineral substance isolation layer contain graphite and quartzy, can expand the sclerosis rapidly and form the protective layer when being heated, and the normal work of protection cable conductor, mineral substance isolation frame set to the three arriss column structure and have strengthened the holistic tensile strength of cable, improve the tensile strength of cable, and the foaming layer has effectively improved the anti-seismic performance of cable conductor.

Description

Isolated form inorganic mineral insulated cable

Technical Field

The utility model relates to the technical field of cables, concretely relates to isolated form inorganic mineral insulated cable.

Background

The mineral cable is a cable capable of keeping safe operation for a certain time under the condition of flame combustion, and is widely applied to places related to fire safety and fire-fighting and life saving, such as high-rise buildings, subways, tunnels, schools and the like, for example, power supply lines and control lines of main power supply, fire-fighting and other emergency facilities in important places, and the traditional mineral insulated cable can keep continuous power supply for a long time after ignition, but has low tensile and seismic resistance grade and complex manufacture, and is easy to break when responding to natural disasters such as displacement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an isolated form inorganic mineral insulated cable is provided, it has good fire resistance, pull resistance and shock resistance.

An isolated inorganic mineral insulated cable comprises a triangular mineral isolation frame, wherein a plurality of groups of cable conductors are arranged in the mineral isolation frame; the outer wall of the cable conductor is wrapped by a low-smoke halogen-free insulating sleeve; a foaming layer is filled between the low-smoke halogen-free insulating sleeve and the mineral substance isolating frame; a flame-retardant layer is arranged on the periphery of the mineral substance isolation frame; three edges of the mineral substance isolation frame are internally tangent to the inner side wall of the flame retardant layer; a mineral isolating layer is filled between the mineral isolating frame and the flame-retardant layer; a metal layer is arranged on the outer side of the flame-retardant layer; and a low-smoke halogen-free sheath is arranged on the outer side of the metal layer.

Preferably, the mineral matter isolation frame has a regular triangular structure.

Preferably, the foamed layer is a mixture of high density polyethylene and low density polyethylene.

Preferably, the flame-retardant layer is a low-smoke halogen-free flame-retardant polyolefin insulating material.

Preferably, the metal layer is made of copper wire or aluminum foil.

Has the advantages that: the utility model has the advantages of reasonable design, through setting up the mineral substance isolation frame and filling there is the mineral substance isolation layer between mineral substance isolation frame and fire-retardant layer, mineral substance isolation frame and mineral substance isolation layer contain graphite and quartzy, can expand the sclerosis formation protective layer rapidly when being heated, separation flame, the normal work of protection cable conductor has strengthened the holistic tensile strength of cable through setting the mineral substance isolation frame to triangular structure, improve the tensile strength of cable, effectively improved the anti-seismic performance of cable conductor through setting up the foaming layer.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

In the figure: 1-a cable conductor; 2-low smoke halogen-free insulating sleeve; 3-a mineral isolation shelf; 4-a foamed layer; 5-a flame retardant layer; 6-a mineral separation layer; 7-a metal layer; 8-low smoke zero halogen sheath.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the utility model provides an isolated inorganic mineral insulated cable, which comprises a triangular mineral isolation frame 3, wherein 3 groups of cable conductors 1 are arranged inside the mineral isolation frame 3; the outer wall of the cable conductor 1 is wrapped with a low-smoke halogen-free insulating sleeve 2; a foaming layer 4 is filled between the low-smoke halogen-free insulating sleeve 2 and the mineral substance isolating frame 3; a flame-retardant layer 5 is arranged at the periphery of the mineral substance isolation frame 3; three edges of the mineral substance isolation frame 3 are internally tangent to the inner side wall of the flame-retardant layer 5; a mineral isolating layer 6 is filled between the mineral isolating frame 3 and the flame-retardant layer 5; by arranging the mineral substance isolation frame 3 and filling the mineral substance isolation layer 6 between the mineral substance isolation frame 3 and the flame-retardant layer 5, the mineral substance isolation frame 3 and the mineral substance isolation layer 6 contain graphite and quartz, and can be rapidly expanded and hardened to form a protection layer when being heated, so that flame is blocked, and the normal work of the cable conductor 1 is protected; a metal layer 7 is arranged on the outer side of the flame-retardant layer 5; a low-smoke halogen-free sheath 8 is arranged outside the metal layer 7; the mineral substance isolation frame 3 is of a regular triangular structure, so that the tensile strength of the whole cable is enhanced and the tensile property of the cable is improved by arranging the mineral substance isolation frame 3 into the triangular structure; the foaming layer 4 is a mixture of high-density polyethylene and low-density polyethylene; the shock resistance of the cable is effectively improved by arranging the foaming layer 4; the flame-retardant layer 5 is a low-smoke halogen-free flame-retardant polyolefin insulating material; the metal layer 7 is made of aluminum foil materials, and the structural strength of the cable is enhanced.

Of course, the above description only shows a certain embodiment of the present invention, and the detailed description thereof is not to be construed as limiting the scope of the present invention, and it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principle and spirit of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an isolated form inorganic mineral insulated cable, includes three prismatic mineral substance isolation frame, its characterized in that: a plurality of groups of cable conductors are arranged in the mineral substance isolation frame; the outer wall of the cable conductor is wrapped by a low-smoke halogen-free insulating sleeve; a foaming layer is filled between the low-smoke halogen-free insulating sleeve and the mineral substance isolating frame; a flame-retardant layer is arranged on the periphery of the mineral substance isolation frame; three edges of the mineral substance isolation frame are internally tangent to the inner side wall of the flame retardant layer; a mineral isolating layer is filled between the mineral isolating frame and the flame-retardant layer; a metal layer is arranged on the outer side of the flame-retardant layer; and a low-smoke halogen-free sheath is arranged on the outer side of the metal layer.

2. The isolated inorganic mineral insulated cable of claim 1, wherein the mineral insulating frame has a regular triangular structure.

3. The insulated inorganic mineral insulated cable of claim 1, wherein the foamed layer is a blend of high density polyethylene and low density polyethylene.

4. The isolated inorganic mineral insulated cable of claim 1, wherein the flame retardant layer is a low smoke zero halogen flame retardant polyolefin insulation.

5. The isolated inorganic mineral insulated cable of claim 1, wherein the metal layer is made of copper wire or aluminum foil.