CN201976273U

CN201976273U - Serial electric heating cable

Info

Publication number: CN201976273U
Application number: CN2011200361251U
Authority: CN
Inventors: 朱榴兴; 王郁; 黄春荣
Original assignee: 顾建忠
Current assignee: Daqing Tianhong Electrical Heating Equipment Co., Ltd.
Priority date: 2011-02-11
Filing date: 2011-02-11
Publication date: 2011-09-14
Anticipated expiration: 2021-02-11

Abstract

A serial electric heating cable mainly solves the problem that the existing serial electric heating cable of a unit length is low in power, and is characterized in that an inner sheath inner layer (2) and a sheath outer layer (3) are wrapped outside each of at least three metal core wires (1) from inside to outside, a reinforcing layer (5) is fittingly lined to the inner side of an outer braided layer (6), an outer sheath layer (4) is fittingly lined to the inner side of the reinforcing layer (5), all the metal core wires (1) are arranged in an inner cavity enclosed by the outer sheath layer (4), and the inner sheath inner layers (2), the inner sheath outer layers (3), the outer sheath layer (4) and the reinforcing layer (5) are all made of fluorinated ethylene propylene resins. The serial electric heating cable is applicable to buried pipelines, high in power of unit length, capable of heating extra-long or ultra-short pipelines, simple in structure, high in power, low in cost, long in service life and high in heating efficiency.

Description

The tandem ribbon heater

Technical field

The utility model relates to a kind of companion's thermic devices, specifically, relates to a kind of electric energy that utilizes and heats and the device of realization buried pipeline companion heat.

Background technology

The ribbon heater is exactly a kind of special cable by electric energy heating back heating, has been widely used at present being used for heat-preserving anti-freezing and thermostatic control in the industries such as oil, chemical industry, medicine and food.At present the ribbon heater mainly is divided into parallel and two kinds of tandems, and wherein the tandem ribbon heater is that the heart yearn of 2 cores is connected into a loop, and when heart yearn during by big electric current, itself produces Joule heat, thereby realizes the electrically heat tracing effect of generation.Through after the application of long period, find that the tandem ribbon heater unit length power of this 2 cored structures is little, and can't realize companion's heat needs of overlength or very-short-reach pipeline.

Summary of the invention

The problems of the prior art that propose in order to solve in the background technology, the utility model provides a kind of tandem ribbon heater, this kind tandem ribbon heater is applicable to buried pipeline, have the high-power characteristics of unit length, can realize companion's hot merit energy of overlength or very-short-reach pipeline, have simple in structure, power is big, cost is low, long service life and the high characteristics of the heat efficiency.

The technical solution of the utility model is: this kind tandem ribbon heater, comprise the outer braid and the metal core wire that constitute by zinc-plated copper wire and stainless steel wire, the quantity of wherein said metal core wire is at least three, is coated with inner sheath internal layer, inner sheath skin by introversion outside the every metal core wire; Outside described, cooperate in the braid to be lined with reinforced layer, cooperate in the described reinforced layer to be lined with external sheath layer; Described whole metal core wire all is positioned at described external sheath layer and surrounds among the inner chamber that forms; Described inner sheath internal layer, inner sheath skin, external sheath layer and reinforced layer all adopt the exhaustive fluorinated ethylene propylene material to make.

In addition, on the basis of such scheme, can also obtain following improvement project: also include at least three conductive core lines among surrounding the inner chamber that forms at described external sheath layer, be with the heart yearn sheath of being made by the insulation heat-barrier material outside described conductive core line, described heart yearn sheath is that hollow cylinder embeds fabricated structure.

The utlity model has following beneficial effect: after taking the described structure of such scheme, owing to comprise three metal core wire at least among this inner chamber, when inserting the power supply line, can adopt three-phase alternating-current supply to be connected to the head end of three metal core wire respectively, and the tail end of three metal core wire is connected, form " star " load, thereby make the power of unit length be increased; In addition, because inner sheath internal layer, inner sheath skin, external sheath layer and reinforced layer etc. all adopt the exhaustive fluorinated ethylene propylene material to make, this material abbreviates F46 as, has very good heat transfer and insulating properties, can realize the higher heat efficiency.And, the improvement project that draws on the basis of this programme, at least three heart yearns that are specifically designed to conduction will be added among the external sheath layer inner chamber, like this, when the overlength pipeline tracing, these three heart yearns can be specifically designed to next section accompanying-heat cable electric energy transmitting, thereby make this programme have the performance of overlength companion heat.

Description of drawings

Fig. 1 is a structural profile schematic diagram of the present utility model.

Fig. 2 is the structural profile schematic diagram of scheme described in the utility model claim 2.

Fig. 3 is the structural representation of heart yearn sheath described in the utility model claim 2.

1-metal core wire among the figure, 2-inner sheath internal layer, 3-inner sheath skin, 4-external sheath layer, 5-reinforced layer, the outer braid of 6-, 7-conductive core line, 8-heart yearn sheath.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this kind tandem ribbon heater, comprise the outer braid 6 and the metal core wire 1 that are made of zinc-plated copper wire and stainless steel wire, the quantity of wherein said metal core wire 2 is at least three, is coated with inner sheath internal layer 2, inner sheath skin 3 by introversion outside the every metal core wire 1; Outside described, cooperate in the braid 6 to be lined with reinforced layer 5, cooperate in the described reinforced layer 5 to be lined with external sheath layer 4; Described whole metal core wire 1 all is positioned at described external sheath layer 4 and surrounds among the inner chamber that forms; Described inner sheath internal layer 2, inner sheath skin 3, external sheath layer 4 and reinforced layer 5 all adopt the exhaustive fluorinated ethylene propylene material to make.

In addition, for further strengthening the extra long distance power supply capacity of this kind ribbon heater, as shown in Figure 2, can among described external sheath layer 4 surrounds the inner chamber that forms, increase at least three conductive core lines 7 are arranged, outside described conductive core line 7, be with the heart yearn sheath of making by the insulation heat-barrier material 8, described heart yearn sheath 8 embeds fabricated structure for hollow cylinder, as shown in Figure 3.Like this, these three leads can be used for transmission of electric energy specially, finish the power delivery to next companion's hot arc, thereby realize the extra long distance power supply.

Claims

1. tandem ribbon heater, comprise the outer braid (6) and the metal core wire (1) that constitute by zinc-plated copper wire and stainless steel wire, it is characterized in that: the quantity of described metal core wire (1) is at least three, and every metal core wire (1) is outer to be coated with inner sheath internal layer (2), inner sheath skin (3) by introversion; Cooperate in the braid outside described (6) to be lined with reinforced layer (5), cooperate in the described reinforced layer (5) to be lined with external sheath layer (4); Described whole metal core wire (1) all is positioned at described external sheath layer (4) and surrounds among the inner chamber that forms; Described inner sheath internal layer (2), inner sheath skin (3), external sheath layer (4) and reinforced layer (5) all adopt the exhaustive fluorinated ethylene propylene material to make.

2. tandem according to claim 1 ribbon heater, it is characterized in that: described external sheath layer (4) also includes at least three conductive core lines (7) among surrounding the inner chamber that forms, be with the heart yearn sheath of being made by the insulation heat-barrier material (8) outside described conductive core line (7), described heart yearn sheath (8) embeds fabricated structure for hollow cylinder.