CN211507202U

CN211507202U - Low-voltage power cable with good flame retardance

Info

Publication number: CN211507202U
Application number: CN202020453671.4U
Authority: CN
Inventors: 李久奎
Original assignee: Sichuan Shenzhou Cable Co ltd
Current assignee: Sichuan Shenzhou Cable Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-09-15
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a low pressure power cable that fire resistance is good, including armor and three group's conductors, the armor sets up in three groups the conductor outside, just the armor inside with it has fire-retardant layer to fill between the conductor, the armor outside is provided with the oversheath, the oversheath outer circumference side evenly is provided with multiunit storage tank, multiunit all vertically be provided with the steel wire in the storage tank. Has the advantages that: the utility model discloses an at the inside fire-retardant layer that sets up of cable sheath, fire-retardant layer through the glass fiber material improves cable fire prevention effect, set up many protection steel wires that equal with conductor length in the sheath outside, increase cable exterior structure's bending toughness and structural strength, prevent that the cable structure from producing the damage in transportation and laying process, evenly set up a plurality of constant head tanks in guard shield length direction simultaneously, in order to improve the not firm problem of lock solid of the smooth surface of current cable, increase cable structure's fixed stability.

Description

Low-voltage power cable with good flame retardance

Technical Field

The utility model relates to a low pressure electric power system field, concretely relates to good low voltage power cable of fire resistance.

Background

A low-voltage cable is a conductor coated with an insulating layer, a protective layer, a shield layer, and the like for transmitting power, signal current, and signal voltage. The low-voltage cable line has the characteristics of reliable operation, no pole erection, no land occupation, no influence on the appearance, less influence from the outside and the like, thereby being widely applied to a low-voltage distribution system. During the use of low voltage power cables, it is generally necessary to ensure the waterproof, flame retardant and damage resistant capabilities of the cable.

The applicant finds that at least the following technical problems exist in the prior art: at present used low tension cable is in transportation and laying process, and cable construction can receive external mechanical force effect usually, leads to cable construction to produce crooked, tensile, twist reverse, malleation and impact scheduling problem, leads to cable construction to produce the damage, influences the normal use on inside utility layer, reduces cable construction's fire resistance even, and the practicality is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a good low pressure power cable of fire resistance just lies in solving above-mentioned problem, sets up fire-retardant layer in cable sheathing inside, sets up many protection steel wires that equal with conductor length in the sheath outside simultaneously, increases cable exterior structure's bending toughness and structural strength, prevents that the cable from damaging to improve cable fire prevention effect through the fire-retardant layer of glass fiber material, the practicality is strong, sees the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a low voltage power cable with good flame retardance, which comprises an armor layer and three groups of conductors, wherein the armor layer is arranged outside the three groups of conductors, a flame retardant layer is filled between the inside of the armor layer and the conductors, and an outer sheath is arranged outside the armor layer;

the outer circumference side of the outer sheath is uniformly provided with a plurality of groups of containing grooves, a plurality of groups of steel wires are longitudinally arranged in the containing grooves, a shield is arranged on the outer circumference side of each steel wire, a plurality of positioning grooves are longitudinally and uniformly arranged on the outer side of the shield, and the shield between every two adjacent groups of positioning grooves protrudes outwards to form a locking block.

By adopting the low-voltage power cable with good flame retardance, the cable outer sheath is supported by the multiple groups of steel wires in the transportation and laying processes of the power cable, and when the cable structure is stressed by external mechanical forces such as bending, torsion and impact, the structural toughness and strength of the cable outer sheath are increased by the steel wires, so that the cable structure is prevented from being damaged by the external forces; when fixing a position fixedly to low tension cable through the cable fixation clamp, penetrate the power cable in the cable fixation clamp along its length direction, through tightening up the cable fixation clamp in order to lock to the outer sheath, ensure cable fixation clamp clamping fixed position card and go into in the guard shield outside constant head tank to the locking piece through the constant head tank both sides restricts the cable position, realizes that low tension cable's location is fixed.

Preferably, the end face of the protective cover is of a semicircular structure, the protective cover and the outer sheath are made of flame-retardant rubber, and the protective cover and the outer sheath are fixedly bonded with the steel wire.

Preferably, the accommodating groove extends to the front end and the rear end of the outer sheath along the length direction of the outer sheath, and the inner bottom of the accommodating groove is of an arc-shaped structure attached to the outer circumferential side of the steel wire.

Preferably, the flame-retardant layer is made of flame-retardant glass fiber, a rubber insulating layer is arranged on the outer side of the conductor, and the insulating layer and the flame-retardant layer are bonded and fixed through viscose.

Preferably, the armor is steel band material, just the armor is fixed in through lapping flame retardant coating outer periphery side.

Preferably, the number of the accommodating grooves is four, the protective covers correspond to the accommodating grooves one to one, and two sides of the outer portion of the locking block are arc-shaped round corners.

Has the advantages that: the utility model discloses an at the inside fire-retardant layer that sets up of cable sheath, fire-retardant layer through the glass fiber material improves cable fire prevention effect, set up many protection steel wires that equal with conductor length in the sheath outside, increase cable exterior structure's bending toughness and structural strength, prevent that the cable structure from producing the damage in transportation and laying process, evenly set up a plurality of constant head tanks in guard shield length direction simultaneously, in order to improve the not firm problem of lock solid of the smooth surface of current cable, increase cable structure's fixed stability, therefore, the clothes hanger is strong in practicability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

fig. 2 is a right view structural diagram of the present invention.

The reference numerals are explained below:

1. a conductor; 101. an insulating layer; 2. a flame retardant layer; 3. an armor layer; 4. an outer sheath; 401. a containing groove; 5. a steel wire; 6. a shield; 601. positioning a groove; 602. and locking the block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the utility model provides a low voltage power cable with good flame retardancy, which comprises an armor layer 3 and three groups of conductors 1, wherein the armor layer 3 is arranged outside the three groups of conductors 1, a flame retardant layer 2 is filled between the inside of the armor layer 3 and the conductors 1, and an outer sheath 4 is arranged outside the armor layer 3;

a plurality of groups of containing grooves 401 are uniformly arranged on the outer circumferential side of the outer sheath 4, steel wires 5 are longitudinally arranged in the plurality of groups of containing grooves 401, a shield 6 is arranged on the outer circumferential side of each of the steel wires 5, the end surface of the shield 6 is in a semicircular structure, the protective cover 6 and the outer sheath 4 are made of flame-retardant rubber, the protective cover 6 and the outer sheath 4 are fixedly bonded with the steel wire 5, the steel wire 5 is clamped into the containing groove 401 through the shield 6, so that the toughness and the structural strength of the outer sheath 4 are improved through the steel wire 5, the cable is prevented from being damaged in the transportation and laying processes, a plurality of positioning grooves 601 are uniformly arranged on the outer side of the shield 6 in the longitudinal direction, the shield 6 between two adjacent groups of positioning grooves 601 protrudes outwards to form locking blocks 602, by providing a plurality of positioning slots 601 on the outside of the shield 6, during the fixing of the cable by the cable fixing clamps, the positioning groove 601 is clamped by the cable fixing clamp to increase the connection stability of the cable and the fixing clamp.

As an optional embodiment, the accommodating grooves 401 extend to the front end and the rear end of the outer sheath 4 along the length direction of the outer sheath 4, the bottom in the accommodating groove 401 is of an arc-shaped structure attached to the outer circumference side of the steel wire 5, so that the attaching tightness between the steel wire 5 and the accommodating groove 401 is increased, the steel wire 5 is of a steel cylindrical structure with the diameter of 2mm, the flame-retardant layer 2 is made of flame-retardant glass fiber material, so as to improve the flame retardancy of the cable, the outer side of the conductor 1 is provided with the rubber insulating layer 101, the insulating layer 101 and the flame-retardant layer 2 are fixed by adhesion through viscose, the armor layer 3 is made of steel strip material, and the armor layer 3 is fixed to the outer circumference side of the flame-retardant layer 2 by wrapping, so as to improve the structural strength of the cable through the armor layer 3, so as to prevent the cable from, in the process of locking the cable through the cable fixing clamp, the fixing clamp clamped in the positioning groove 601 is convenient to limit through the locking block 602, and the laying stability of the cable is improved.

By adopting the structure, in the process of transporting and laying the power cable, the cable outer sheath 4 is supported by the plurality of groups of steel wires 5, and when the cable structure is pressed by external mechanical forces such as bending, torsion and impact, the structural toughness and strength of the cable outer sheath 4 are increased by the steel wires 5, so that the damage of the external force to the cable structure is resisted; when the low-voltage cable is positioned and fixed through the cable fixing clamp, the power cable penetrates into the cable fixing clamp along the length direction of the power cable, the outer sheath 4 is locked by tightening the cable fixing clamp, the fixed position of the cable fixing clamp is ensured to be clamped into the positioning groove 601 at the outer side of the protective cover 6, the position of the cable is limited through the locking blocks 602 at the two sides of the positioning groove 601, and the positioning and fixing of the low-voltage power cable are realized;

through setting up fire-retardant layer 2 in cable sheathing inside, 2 improvement cable fire prevention effects on fire-retardant layer through the glass fiber material, set up many protection steel wires 5 that equal with 1 length of conductor in the sheath outside, increase cable exterior structure's bending toughness and structural strength, prevent that the cable structure from producing the damage in transportation and laying process, evenly set up a plurality of constant head tanks 601 at 6 length direction of guard shield simultaneously, in order to improve the not firm problem of lock solid of the smooth surface of current cable, increase cable structure's fixed stability, therefore, the clothes hanger is strong in practicability.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A low-voltage power cable with good flame retardance is characterized in that: the cable comprises an armor layer (3) and three groups of conductors (1), wherein the armor layer (3) is arranged on the outer sides of the three groups of conductors (1), a flame-retardant layer (2) is filled between the inside of the armor layer (3) and the conductors (1), and an outer sheath (4) is arranged on the outer side of the armor layer (3);

outer circumferencial side of oversheath (4) evenly is provided with multiunit storage tank (401), multiunit all vertically be provided with steel wire (5) in storage tank (401), many steel wire (5) outer circumferencial side all is provided with guard shield (6), and this guard shield (6) outside vertically evenly is provided with a plurality of constant head tanks (601), adjacent two sets of between constant head tank (601) guard shield (6) outside arch formation locking piece (602).

2. The low voltage power cable with good flame retardancy as claimed in claim 1, wherein: the end face of the protective cover (6) is of a semicircular structure, the protective cover (6) and the outer sheath (4) are made of flame-retardant rubber materials, and the protective cover (6) and the outer sheath (4) are fixedly bonded with the steel wire (5).

3. The low voltage power cable with good flame retardancy as claimed in claim 1, wherein: the accommodating groove (401) extends to the front end and the rear end of the outer sheath (4) along the length direction of the outer sheath (4), and the inner bottom of the accommodating groove (401) is of an arc-shaped structure attached to the outer circumferential side of the steel wire (5).

4. The low voltage power cable with good flame retardancy as claimed in claim 1, wherein: the flame-retardant layer (2) is made of flame-retardant glass fiber, a rubber insulating layer (101) is arranged on the outer side of the conductor (1), and the insulating layer (101) is fixedly bonded with the flame-retardant layer (2) through viscose glue.

5. The low voltage power cable with good flame retardancy as claimed in claim 1, wherein: the armor layer (3) is made of steel belt materials, and the armor layer (3) is fixed on the outer circumference side of the flame-retardant layer (2) through wrapping.

6. The low voltage power cable with good flame retardancy as claimed in claim 1, wherein: the number of the accommodating grooves (401) is four, the protective covers (6) correspond to the accommodating grooves (401) one by one, and two sides of the outer part of the locking block (602) are arc-shaped round corners.