CN112735663A

CN112735663A - High-temperature-resistant double-layer polyvinyl chloride wire insulated cable and preparation method thereof

Info

Publication number: CN112735663A
Application number: CN202011607574.7A
Authority: CN
Inventors: 滕磊; 赵大亮
Original assignee: Wuhan Jianghua Wire And Cable Co ltd
Current assignee: Wuhan Jianghua Wire And Cable Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-30

Abstract

The invention provides a high-temperature-resistant double-layer polyvinyl chloride wire insulated cable and a preparation method thereof. Nanometer silica has good heat conductivity, consequently has the whole thermal diffusivity of promotion cable that can be fine through the heat dissipation insulating piece, and owing to formed first connection piece and second connection piece simultaneously to let first connection piece, second connection piece be located first insulation cover and second insulation cover respectively when later stage cladding first insulation cover and second insulation cover again, make first insulation cover stronger with the whole associativity of second insulation cover.

Description

High-temperature-resistant double-layer polyvinyl chloride wire insulated cable and preparation method thereof

Technical Field

The invention relates to the field of cables, in particular to a high-temperature-resistant double-layer polyvinyl chloride wire insulated cable and a preparation method thereof.

Background

The BV wire is called a plastic copper wire for short and is called a copper core polyvinyl chloride insulating cloth wire completely, so that a copper conductor and polyvinyl chloride are arranged outside the BV wire respectively, and the polyvinyl chloride wraps the copper conductor inside the BV wire.

The BV wire is generally of a single-layer structure, and in order to improve the insulating property of the BV wire, a plurality of layers are also arranged, for example, the publication No. CN209401351U discloses a double-layer polyvinyl chloride insulated wire which comprises a cable conducting core, wherein a transparent PVC material layer is arranged on the outer surface of the cable conducting core, and a colored PVC material layer is arranged on the outer surface of the transparent PVC material layer; the colored PVC material layer is formed by doping colored master batches in a transparent PVC material layer; the product greatly improves the electrical insulation performance, is 50 times of the conventional polyvinyl chloride insulated wire, and has excellent and stable insulation performance.

At present, two layers of insulating sleeves are respectively plated through two extruders twice, and the first insulating sleeve is cooled and then extruded for the second time, but the whole combination performance of the double-layer insulating sleeve is poor due to the fact that the contact surfaces of the two layers of insulating sleeves are smooth.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the high-temperature-resistant double-layer polyvinyl chloride wire insulated cable, which effectively improves the overall associativity of the insulating sleeve and the heat dissipation of the cable.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a high temperature resistant double-deck polyvinyl chloride line insulated cable, includes copper line and the first insulation cover of cladding outside the copper line, the second insulation cover of cladding outside first insulation cover, follows a plurality of heat dissipation insulating pieces of copper line circumferencial direction equipartition, heat dissipation insulating piece are simultaneously along copper line axial direction interval equipartition setting, heat dissipation insulating piece is made after being mixed by polyvinyl chloride and nanometer silica, heat dissipation insulating piece has first connection piece and second connection piece along copper line circumferencial direction extension, first connection piece is located the first insulation cover, the second connection piece is located the second insulation cover.

Wherein nanometer silica has insulating nature and good heat conductivity, and its coefficient of heat conductivity is superior to polyvinyl chloride far away, consequently through the whole thermal diffusivity of promotion cable that heat dissipation insulating piece can be fine, and owing to formed first connection piece and second connection piece simultaneously, and let first connection piece, second connection piece be located first insulating cover and second insulating cover respectively when later stage cladding first insulating cover and second insulating cover again, make first insulating cover stronger with the whole associativity of second insulating cover.

Further setting up, the heat dissipation insulating piece sets up six along copper line circumferencial direction equipartition.

And further setting, wherein the heat dissipation insulating sheet extends out of the second insulating sleeve.

Further setting up, first connection piece and second connection piece all use the heat dissipation insulating piece to set up two as central symmetry.

Further setting that the volume ratio of the polyvinyl chloride to the nano silicon dioxide is 1: 1.

The volume ratio of the two influences the viscosity and the heat dissipation performance, and the balance performance value of the two is 1: 1.

The second purpose of the invention is to provide a preparation method of the high-temperature-resistant double-layer polyvinyl chloride wire insulated cable, which comprises the steps of firstly coating a heat dissipation insulating sheet, a first connecting sheet and a second connecting sheet on a copper wire by using a mould through an extruder, then covering a first insulating sleeve, and coating a second insulating sleeve after the first insulating sleeve is cooled.

In conclusion, the invention has the following beneficial effects: through the good heat conductivity of nanometer silica, its coefficient of heat conductivity is superior to polyvinyl chloride far away, consequently through the whole thermal diffusivity of promotion cable that the heat dissipation insulating piece can be fine, and owing to formed first connection piece and second connection piece simultaneously, and let first connection piece, second connection piece be located first insulation cover and second insulation cover respectively when later stage cladding first insulation cover and second insulation cover again, make the whole associativity of first insulation cover and second insulation cover stronger.

Drawings

FIG. 1 is a schematic structural view of example 1;

fig. 2 is a schematic structural view of the mold.

Reference numerals: 1. a copper wire; 2. a first insulating sleeve; 3. a second insulating sleeve; 4. a heat dissipation insulation sheet; 5. a first connecting piece; 6. a second connecting sheet; 7. and (5) molding.

Detailed Description

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1: the utility model provides a high temperature resistant double-deck polyvinyl chloride line insulated wire cable, includes copper line 1 and cladding first insulating cover 2, the cladding second insulating cover 3 outside first insulating cover 2 outside copper line 1.

Follow a plurality of heat dissipation insulating pieces 4 of 1 circumferencial direction equipartition of copper line, heat dissipation insulating piece 4 stretches out outside second insulating cover 3. Six heat dissipation insulating sheets 4 are uniformly distributed along the circumferential direction of the copper wire 1. The heat dissipation insulating sheets 4 are uniformly distributed at intervals along the axial direction of the copper wire 1, the heat dissipation insulating sheets 4 are made of polyvinyl chloride and nano silicon dioxide after mixing, and the volume ratio of the polyvinyl chloride to the nano silicon dioxide is 1: 1.

Every heat dissipation insulating sheet 4 has first connection piece 5 and second connection piece 6 along 1 circumferencial direction integrated into one piece extension of copper line, and first connection piece 5 and second connection piece 6 all use heat dissipation insulating sheet 4 to set up two as centrosymmetric. The first connecting piece 5 is located in the first insulating sleeve 2 and the second connecting piece 6 is located in the second insulating sleeve 3.

Example 2: a method for preparing a high-temperature-resistant double-layer polyvinyl chloride wire insulated cable comprises the steps of coating a heat dissipation insulation sheet 4, a first connecting sheet 5 and a second connecting sheet 6 on a copper wire 1 through an extruder by adopting a mold 7, then covering a first insulating sleeve 2, and coating a second insulating sleeve 3 after the first insulating sleeve 2 is cooled.

Claims

1. The utility model provides a high temperature resistant double-deck polyvinyl chloride line insulated cable, includes copper line (1) and cladding first insulating cover (2) outside copper line (1), cladding second insulating cover (3) outside first insulating cover (2), its characterized in that: follow copper line (1) a plurality of heat dissipation insulating piece (4) of circumferencial direction equipartition, heat dissipation insulating piece (4) are simultaneously along copper line (1) axial direction interval equipartition setting, heat dissipation insulating piece (4) are made after mixing by polyvinyl chloride and nanosilicon dioxide, heat dissipation insulating piece (4) extend along copper line (1) circumferencial direction has first connection piece (5) and second connection piece (6), first connection piece (5) are located first insulation cover (2), second connection piece (6) are located second insulation cover (3).

2. The high temperature resistant double layer polyvinyl chloride wire insulated cable according to claim 1, characterized in that: six heat dissipation insulating sheets (4) are uniformly distributed along the circumferential direction of the copper wire (1).

3. The high temperature resistant double layer polyvinyl chloride wire insulated cable according to claim 1, characterized in that: the heat dissipation insulating sheet (4) extends out of the second insulating sleeve (3).

4. The high temperature resistant double layer polyvinyl chloride wire insulated cable according to claim 1, characterized in that: the first connecting sheet (5) and the second connecting sheet (6) are symmetrically arranged by taking the heat dissipation insulating sheet (4) as a center.

5. The high temperature resistant double layer polyvinyl chloride wire insulated cable according to claim 1, characterized in that: the volume ratio of the polyvinyl chloride to the nano silicon dioxide is 1: 1.

6. A preparation method of a high-temperature-resistant double-layer polyvinyl chloride wire insulated cable is characterized by comprising the following steps: a mould (7) is adopted to coat the heat dissipation insulation sheet (4), the first connecting sheet (5) and the second connecting sheet (6) on the copper wire (1) through an extruder, then the first insulation sleeve (2) is covered, and the second insulation sleeve (3) is coated after the first insulation sleeve (2) is cooled.