CN209962752U

CN209962752U - Single-core pre-branch cable with non-metallic sheath mineral insulation

Info

Publication number: CN209962752U
Application number: CN201920957237.7U
Authority: CN
Inventors: 张润浩; 黄伟立; 李金堂; 刘焕新; 单旭凯
Original assignee: Zhejiang Wanma Co Ltd
Current assignee: Zhejiang Wanma Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-01-17
Anticipated expiration: 2029-06-24

Abstract

A single-core pre-branch cable with a non-metallic sheath and mineral insulation comprises a main cable, branch cables, a ceramic polyolefin injection plastic layer, a cable connecting copper sleeve and a joint protecting mica tape. The main and branch cables are composed of conductors, mica tapes, ceramic fireproof and fire-resistant composite tapes, ceramic polyolefin insulating layers and ceramic polyolefin outer sheaths. The mica tape is coated outside the conductor, the ceramic fireproof and fireproof composite tape is coated outside the mica tape, the ceramic polyolefin insulating layer is coated outside the ceramic fireproof and fireproof composite tape, and the ceramic polyolefin outer sheath is coated outside the ceramic polyolefin insulating layer. The right end of the left main cable, the left end of the right main cable and the left end of the branch cable are all in compression joint with the cable connecting copper sleeve, and the joint protecting mica tape covers the connecting joints of the left main cable, the right main cable and the branch cable and the cable connecting copper sleeve. The right end of the left main cable, the left end of the right main cable, the left end of the branch cable and the joint protection mica tape are all coated by ceramic polyolefin injection plastic layers.

Description

Single-core pre-branch cable with non-metallic sheath mineral insulation

Technical Field

The utility model relates to a branch cable is in advance divided, concretely relates to 0.6/1kV single core branch cable in advance.

Background

In the use process of the cable, an electrical fire disaster is caused by the faults of electric leakage, short circuit, overload, poor contact and the like of an electrical circuit and electrical equipment, and further great threat is caused to the life and property safety of people. According to the statistic data display of the fire department of the ministry of public security: 4 thousands of electric fires occur in China every year, on average 110 fires occur every day, and about 10 minutes of electric fires occur together. The electric fire caused by the faults of electric leakage, short circuit, overload, poor contact, temperature rise and the like of electric lines and electric equipment accounts for 90 percent, and the prevention of the fire accidents is always the focus of social attention.

Currently, fireproof cables in use in the market generally adopt a single mica tape as a fireproof layer, and the electric performance of the cables cannot be considered at the same time. The outer layer is coated with aluminum hydroxide, sodium hydroxide and other substances, and can release crystal water at high temperature to reduce the ignition point so as to achieve the purposes of fire insulation and even fire prevention. This actually plays a certain role, but in the aspect of fire prevention time and fire prevention temperature, the effect is fairly limited to there are problems such as fire-proof layer moisture absorption, cable softness degree difference, has influenced the electrical safety and has increaseed the installation and lay the degree of difficulty. So to say, the market at present urgently needs a more economical and practical flexible fireproof cable. The branch cable is a new building distribution product which is newly popularized and used in China, and is also developed in the direction. Application number 201320376004.0 grant publication number CN 203351259U, utility model patent document entitled "novel flexible single core fire prevention branch in advance has sheath cable" discloses a branch cable in advance of single core: "including leader cable and branch cable, its characterized in that leader cable and branch cable in all be provided with the copper conductor and establish the flame retardant coating outside the copper conductor, the flame retardant coating overcoat be equipped with fire-resistant insulating layer, fire-resistant insulating layer outside in proper order the cover be equipped with fire prevention drainage layer and fire-retardant inoxidizing coating. "in fact, the utility model has good bending performance and fire resistance stability and has larger improvement space.

Disclosure of Invention

The main purpose of the utility model is to develop a nonmetal sheath mineral insulation single-core pre-branch cable which has excellent bending performance and fireproof performance and is suitable for 0.6/1kV lines.

The utility model discloses used technical scheme is: a mineral insulated single-core pre-branch cable with a non-metallic sheath comprises a main cable, branch cables, a ceramic polyolefin injection plastic layer, a cable connecting copper sleeve and a joint protecting mica tape;

the main cable and the branch cable are respectively composed of a conductor, a mica tape, a ceramic fireproof and fireproof composite tape, a ceramic polyolefin insulating layer and a ceramic polyolefin outer sheath. Wherein the mica tape is coated outside the conductor, the ceramic fireproof and fireproof composite tape is coated outside the mica tape, the ceramic polyolefin insulating layer is coated outside the ceramic fireproof and fireproof composite tape, and the ceramic polyolefin outer sheath is coated outside the ceramic polyolefin insulating layer;

the right end of the left main cable, the left end of the right main cable and the left end of the branch cable are inserted into the cable connecting copper sleeve and are in press connection with the cable connecting copper sleeve, and the joint protecting mica tape covers the connecting joints of the left main cable, the right main cable and the branch cable and the cable connecting copper sleeve;

the right end of the left main cable, the left end of the right main cable, the left end of the branch cable and the joint protection mica tape are all coated by ceramic polyolefin injection plastic layers.

Preferably, the right end of the left main cable is in contact with the left end of the right main cable and the left end of the branch cable.

Preferably, the cable connecting copper sleeve is provided with four notches which are uniformly distributed on two circumferences.

Preferably, the width of the cable connecting copper sheath wall between the inner edges of two adjacent cut-outs is smaller than the distance of the outer edges of the two cut-outs from the respective ends of the cable connecting copper sheath.

The utility model has the advantages that: the bending performance of the main cable is excellent due to the non-metal sheath cable structure; the structure is that mica tape, ceramic fireproof and fireproof composite tape and ceramic polyolefin are adopted. The utility model has excellent fireproof performance; in addition, the specific structure of the cable connection copper sleeve is beneficial to ensuring the electric connection performance between the left main cable, the right main cable and the branch cable.

Drawings

FIG. 1: the structure of the utility model is shown schematically;

FIG. 2: a schematic cross-sectional view of a main cable and a branch cable;

in the figure: the cable comprises a conductor 1, a mica tape 2, a ceramic fireproof and fireproof composite tape 3, a ceramic polyolefin insulating layer 4, a ceramic polyolefin outer sheath 5, a ceramic polyolefin injection molding layer 6, a cable connecting copper sleeve 7, a joint protection mica tape 8, a main cable 10 and a branch cable 11.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model comprises a main cable 10, a branch cable 11, a ceramic polyolefin injection plastic layer 6, a cable connecting copper sleeve 7 and a joint protecting mica tape 8;

the main cable 10 and the branch cables 11 are composed of conductors 1, mica tapes 2, ceramic fireproof and fireproof composite tapes 3, ceramic polyolefin insulating layers 4 and ceramic polyolefin outer sheaths 5. Wherein the mica tape 2 is coated outside the conductor 1, the ceramic fireproof and fireproof composite tape 3 is coated outside the mica tape 2, the ceramic polyolefin insulating layer 4 is coated outside the ceramic fireproof and fireproof composite tape 3, and the ceramic polyolefin outer sheath 5 is coated outside the ceramic polyolefin insulating layer 4;

the right end of the left main cable 10, the left end of the right main cable 10 and the left end of the branch cable 11 are inserted into the cable connecting copper sleeve 7, the right end of the left main cable 10 is in contact connection with the left end of the right main cable 10 and the left end of the branch cable 11, the right end of the left main cable 10, the left end of the right main cable 10 and the left end of the branch cable 11 are in compression joint with the cable connecting copper sleeve 7, and the joint protecting mica tape 8 covers the connecting joints of the left main cable 10, the right main cable 10 and the branch cable 11;

the right end of the left main cable 10, the left end of the right main cable 10, the left end of the branch cable 11 and the joint protection mica tape 8 are all coated by the ceramic polyolefin injection plastic layer 6.

Preferably, four notches 7.1 are arranged on the cable connecting copper sleeve 7, the four notches 7.1 are uniformly distributed on two circumferences, and the width 7.2 of the wall of the cable connecting copper sleeve 7 between the inner edges of two adjacent notches 7.1 is smaller than the distance between the outer edges of the two notches 7.1 and the corresponding end parts of the cable connecting copper sleeve 7.

The above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes made in the shape, structure and design objectives of the present invention should be considered within the scope of the present invention, i.e. all equivalent changes should be protected by the present invention.

Claims

1. A single-core pre-branch cable with a non-metal sheath and mineral insulation comprises a main cable (10) and a branch cable (11); the method is characterized in that: the cable is characterized by also comprising a ceramic polyolefin injection plastic layer (6), a cable connecting copper sleeve (7) and a joint protecting mica tape (8);

the main cable (10) and the branch cables (11) are composed of conductors (1), mica tapes (2), ceramic fireproof and fireproof composite tapes (3), ceramic polyolefin insulating layers (4) and ceramic polyolefin outer sheaths (5), wherein the mica tapes (2) are coated outside the conductors (1), the ceramic fireproof and fireproof composite tapes (3) are coated outside the mica tapes (2), the ceramic polyolefin insulating layers (4) are coated outside the ceramic fireproof and fireproof composite tapes (3), and the ceramic polyolefin outer sheaths (5) are coated outside the ceramic polyolefin insulating layers (4);

the right end of the left main cable (10), the left end of the right main cable (10) and the left end of the branch cable (11) are inserted into the cable connecting copper sleeve (7) and are in compression joint with the cable connecting copper sleeve (7), and the left main cable (10), the right main cable (10), the connecting joint of the branch cable (11) and the cable connecting copper sleeve (7) are coated by the joint protecting mica tape (8);

the right end of the left main cable (10), the left end of the right main cable (10), the left end of the branch cable (11) and the joint protection mica tape (8) are all coated by the ceramic polyolefin injection plastic layer (6).

2. The non-metallic sheath mineral insulation single core pre-branch cable of claim 1, wherein: the right end of the left main cable (10) is in contact connection with the left end of the right main cable (10) and the left end of the branch cable (11).

3. The non-metallic sheath mineral insulation single core pre-branch cable of claim 1, wherein: four notches (7.1) are arranged on the cable connecting copper sleeve (7), and the four notches (7.1) are uniformly distributed on two circumferences.

4. The non-metallic sheath mineral insulation single core pre-branch cable of claim 3, wherein: the width (7.2) of the wall of the cable connecting copper sleeve (7) between the inner edges of two adjacent notches (7.1) is smaller than the distance between the outer edges of the two notches (7.1) and the corresponding end part of the cable connecting copper sleeve (7).