阅读说明：本技术 一种双导双发热的发热电缆及其制备方法 (Double-conductor double-heating cable and preparation method thereof ) 是由 陈健 于 2019-10-18 设计创作，主要内容包括：本发明的一种双导双发热的发热电缆及其制备方法,属于发热电缆技术领域,包括多根发热丝,多根发热丝表面均包覆绝缘层一,绝缘层一外包覆绝缘层二,绝缘层二外包覆铝箔屏蔽层,铝箔屏蔽层和绝缘层二之间设有地线组,铝箔屏蔽层外包覆保护套,两根发热丝为双导结构,所述两根发热丝得一端串联,另一端共接一个接头,此设计的发热电缆采用铝箔屏蔽辐射,同时双导单接头的设计,使得该电缆的使用方便,发热均衡,即开即热。(The invention relates to a double-conductor double-heating cable and a preparation method thereof, belonging to the technical field of heating cables.)

1. The utility model provides a two heating cable that generate heat of leading which characterized in that: the heating wire comprises a plurality of heating wires, wherein the surfaces of the plurality of heating wires are coated with an insulating layer I, an insulating layer II is coated outside the insulating layer I, an aluminum foil shielding layer is coated outside the insulating layer II, a ground wire group is arranged between the aluminum foil shielding layer and the insulating layer II, and the aluminum foil shielding layer is coated with a protective sleeve.

2. A double-lead double-heat-generating heating cable according to claim 1, wherein: the plurality of heating wires comprise two heating wires.

3. A double-lead double-heat-generating heating cable according to claim 1 or 2, characterized in that: the two heating wires are of a double-guide structure, one ends of the two heating wires are connected in series, and the other ends of the two heating wires are connected with a joint.

4. A double-lead double-heat-generating heating cable according to claim 1, wherein: the heating wire is a metal alloy wire.

5. A double-lead double-heat-generating heating cable according to claim 1, wherein: the ground wire group comprises a plurality of ground wires which are uniformly distributed in a single layer.

6. A double-lead double-heat-generating heating cable according to claim 1, wherein: the first insulating layer is made of fluoroplastic materials, and the second insulating layer is made of XLPE materials.

7. A preparation method of a double-conducting double-heating cable is characterized by comprising the following steps: the preparation method comprises the step of sequentially carrying out coating processing from the inner layer to the outer layer, wherein the cooling mode in the processing process is liquid cooling.

8. The method for preparing a double-conductor double-heating cable according to claim 7, wherein the method comprises the following steps: the preparation method comprises the following steps:

s100, coating an insulating layer I on the surface of the heating wire by using a coating layer;

s200, combining, namely combining the two heating wires coated with the first insulating layer and coating a second insulating layer to form a combined layer;

s300, radiation prevention, namely adding a ground wire outside the combined layer and wrapping the ground wire with an aluminum foil;

and S400, protecting, namely covering a protective layer on the cable coated with the aluminum foil.

9. The method for preparing a double-conductor double-heating cable according to claim 8, wherein the method comprises the following steps: the specific method for preventing radiation in the step S300 is to simultaneously pass the strip-shaped aluminum foil, the combined layer and the ground wire through the tapered opening, and the aluminum foil is curled and extruded by the tapered opening, so that the aluminum foil radiation-proof layer is finally formed on the outer surface of the combined layer.

Technical Field

The invention belongs to the technical field of heating cables, and particularly relates to a double-guide double-heating cable and a preparation method thereof.

Background

The heating cable is made into a cable structure, takes electric power as energy, utilizes alloy resistance wires to perform power-on heating so as to achieve the heating or heat preservation effect, and is generally divided into a single conductor and a double conductor, namely the heating cable.

The heating cable that adopts two to lead all uses the double joint structure usually, and the double joint structure needs two power supplies to supply power when using, and the heating efficiency of two heater strips in the heating cable of double joint is different simultaneously, adjusts heating power inaccurate.

Many heating cables on the market adopt semiconductors to generate heat, have very strong power attenuation, and the effect of generating heat is poor.

Disclosure of Invention

1. Technical problem to be solved by the invention

The present invention aims to solve the above-mentioned problems of the prior art.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a double-guide double-heating cable which comprises a plurality of heating wires, wherein the surfaces of the heating wires are respectively coated with a first insulating layer, the first insulating layer is coated with a second insulating layer, the second insulating layer is coated with an aluminum foil shielding layer, a ground wire group is arranged between the aluminum foil shielding layer and the second insulating layer, and the aluminum foil shielding layer is coated with a protective sleeve.

Preferably, the plurality of heating wires includes two heating wires.

Preferably, the two heating wires are of a double-conductor structure, one ends of the two heating wires are connected in series, and the other ends of the two heating wires are connected with a joint.

Preferably, the heating wire is a metal alloy wire.

Preferably, the ground wire group comprises a plurality of ground wires which are uniformly distributed in a single layer.

Preferably, the first insulating layer is made of fluoroplastic, and the second insulating layer is made of XLPE.

A preparation method of a double-conducting and double-heating cable comprises the steps of sequentially carrying out coating processing from an inner layer to an outer layer, wherein a cooling mode in the processing process is liquid cooling.

Preferably, the preparation method comprises the following steps:

s100, coating an insulating layer I on the surface of the heating wire by using a coating layer;

s200, combining, namely combining the two heating wires coated with the first insulating layer and coating a second insulating layer to form a combined layer;

s300, radiation prevention, namely adding a ground wire outside the combined layer and wrapping the ground wire with an aluminum foil;

and S400, protecting, namely covering a protective layer on the cable coated with the aluminum foil.

Preferably, the radiation-proof specific method in step S300 is to pass the strip-shaped aluminum foil, the combined layer and the ground wire through a tapered opening at the same time, and the tapered opening curls and extrudes the aluminum foil to finally form an aluminum foil radiation-proof layer on the outer surface of the combined layer.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) the heating cable comprises a plurality of heating wires, wherein the surfaces of the heating wires are coated with a first insulating layer, the first insulating layer is coated with a second insulating layer, the second insulating layer is coated with an aluminum foil shielding layer, a ground wire group is arranged between the aluminum foil shielding layer and the second insulating layer, and the aluminum foil shielding layer is coated with a protective sleeve.

(2) According to the double-conductor double-heating cable, the two heating wires are of a double-conductor structure, one ends of the two heating wires are connected in series, the other ends of the two heating wires are connected with the same connector, the double-conductor structure and the single-connector design are adopted, the laying and the installation are convenient, the external power supply is convenient and fast, and meanwhile, the heating of the whole heating cable is balanced and the adjustment is stable.

Drawings

Fig. 1 is a schematic structural diagram of a dual-conductor dual-heating cable according to the present invention;

FIG. 2 is a cross-sectional view of a dual-conductor dual-heating cable according to the present invention;

FIG. 3 is a cross-sectional view of a dual conductor dual heat generating cable of the present invention;

fig. 4 is a flow chart of a method of a dual-lead dual-heating cable according to the present invention.

The reference numerals in the schematic drawings illustrate:

100. a heater; 110. a first insulating layer; 120. a second insulating layer; 130. an aluminum foil shielding layer; 140. a ground wire group; 150. and (6) a protective sleeve.

Detailed Description

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.