CN206602675U - A kind of heater wire of flat conductor structure - Google Patents

Abstract

The utility model discloses a kind of heater wire of flat conductor structure, including metal conductor layer, flame retardant insulation, PTC layers, heat-conducting layer and the insulating barrier set from inside to outside；The heat-conducting layer includes the first heat-conducting part and the second heat-conducting part, and first heat-conducting part is arranged at described PTC layers outside, and second heat-conducting part is used to connect first heat-conducting part and the insulating barrier.The directional transmissions of PTC layers of heat are realized in the setting of heat-conducting layer, reduce conduction of the heat to air side, are improved the heat conduction to pipeline, are improved the heat utilization ratio of the heater wire.

Description

A kind of heater wire of flat conductor structure

Technical field

The utility model is related to electric wire field, and in particular to a kind of heater wire of flat conductor structure.

Background technology

Automatic control temperature heating wire can volitional check heating when temperature, be suitable for pipeline, equipment and container temperature control, heat tracing, Insulation, heating, in oil, chemical industry, metallurgy, light industry, food, freezing, building, coal gas, byproduct production, processing and other departments Tool has been widely used.

The structure of automatic control temperature heating wire of the prior art is mostly placed using two or many parallel conductive electrodes In in PTC core ribbon, the supplementary structure such as coated insulation, shielding and sheath afterwards, whole cable dredged in flat be around in it is right on pipeline Pipeline is heated.Its action principle is：The PTC core ribbon that electric current is passed through between two electrodes by a conductive electrode is led to another Electrode formation loop, electric energy makes PTC core ribbon heat up, while its resistance increases, when the temperature of PTC core ribbon rises to ptc material After Curie temperature, step evolution increase is presented in resistance, and now PTC core ribbon is suitable with insulator, can be to block electric current, PTC core ribbon Temperature no longer raise.At the same time, PTC core ribbon is conducted heat by sheath to the relatively low heated object of temperature, until heating object Temperature close to PTC core ribbon temperature when, heat transfer almost stops, and power levels off to zero, makes heating object temperature substantially steady It is scheduled on Curie temperature of ptc material or so.

But be around in pipeline external outside more than automatic control temperature heating wire of the prior art and heated, during heating, The heat that heater wire is conducted to air and into pipeline is suitable, or even the heat conducted into air is more than into pipeline The heat conducted, causes the waste of heater wire heat, reduces the efficiency of heating surface to liquid in pipeline, causes the waste of resource.

In view of drawbacks described above, it is new that the utility model creator obtains this practicality finally by prolonged research and practice Type.

Utility model content

To solve above-mentioned technological deficiency, the technical solution adopted in the utility model is that there is provided a kind of strap structure Heater wire, including metal conductor layer, flame retardant insulation, PTC layers, heat-conducting layer and the insulating barrier set from inside to outside；It is described to lead Thermosphere includes the first heat-conducting part and the second heat-conducting part；The first heat-conducting part ellipsoidal cross section, is arranged at described PTC layers Outside；The second heat-conducting part section is rectangle, and is arranged between first heat-conducting part and the insulating barrier, for connecting First heat-conducting part and the insulating barrier.

Preferably, being provided with thermal insulation layer on the upside of first heat-conducting part, the heat-insulated layer cross section is in circular arc.

Preferably, the heat-conducting layer also include the 3rd heat-conducting part, the 3rd heat-conducting part be located at second heat-conducting part with Between the insulating barrier, the section of the 3rd heat-conducting part is in strip.

Preferably, the 3rd heat-conducting part is respectively arranged with the lines of form fit with the insulating barrier junction.

Preferably, the lines is zigzag or wavy.

Preferably, being provided with metal screen layer and restrictive coating outside the insulating barrier.

Preferably, the metal screen layer uses aluminium foil or tinned copper wire.

Preferably, being provided with least one cavity in the insulating barrier, be arranged in parallel between the cavity, the cavity with The metal conductor layer is vertically arranged.

Preferably, the metal conductor layer is metal-cored including at least two.

Preferably, the heater wire is in flat structure.

The beneficial effects of the utility model are compared with the prior art：1. PTC layers of heat is realized in the setting of heat-conducting layer Directional transmissions, reduce conduction of the heat to air side, improve the heat conduction to pipeline, improve the heat profit of the heater wire With rate；2. being provided with thermal insulation layer on the outside of heat-conducting layer, conduction of the heat to air side is further reduced；Heat-conducting layer passes through with insulating barrier The contact area of the lines connection of form fit, increase heat-conducting layer and insulating barrier, improves the heat conduction to pipeline；3. insulating barrier At least one cavity is inside provided with, on the one hand the cavity forms dual barrier with the thermal insulation layer, effectively reduces heat to sky Conduction in gas, on the other hand can also mitigate the weight of heater wire, increase the pliability of heater wire so that heater wire can be tight It is close outer to be around on pipeline.

Brief description of the drawings

In order to illustrate more clearly of the technical scheme in each embodiment of the utility model, institute in being described below to embodiment The accompanying drawing needed to use is briefly described.

Fig. 1 is the sectional view of the heater wire in the utility model embodiment one；

Fig. 2 is the sectional view of the heater wire in the utility model embodiment two；

Fig. 3 is the sectional view of the heater wire in the utility model embodiment three；

Numeral is represented in figure：

1- metal conductor layers；2- flame retardant insulations；3-PTC layers；4- heat-conducting layers；The heat-conducting parts of 41- first；The heat conduction of 42- second Portion；The heat-conducting parts of 43- the 3rd；5- thermal insulation layers；6- insulating barriers；61- cavitys.

Embodiment

Below in conjunction with accompanying drawing, and other technical characteristic above-mentioned to the utility model and advantage are described in more detail.

Embodiment one

Heater wire described in the present embodiment is in integrally line style, is flat structure, section is as shown in Figure 1.

Referring to accompanying drawing 1, at least metal conductor layer 1, one that heater wire described in the present embodiment includes being sequentially arranged is fire-retardant exhausted Edge layer 2, a PTC layers 3, a heat-conducting layer 4 and an insulating barrier 6, wherein, the metal conductor layer 1 is metal-cored including at least two, First metal-cored 11 and one second metal-cored 12 respectively, one as another of positive pole as negative pole, described first is metal-cored 11 be arranged in parallel with described second metal-cored 12.The PTC layers 3 are made up of ptc material, with positive temperature coefficient, it is this just Temperature coefficient can allow the PTC layers 3 conductive, heat production when metal conductor layer 1 is powered, and in the mistake of heat production Temperature is lifted in journey, and the rising of resistance is caused while temperature rises, the rising of resistance can reduce the power of heater wire, Temperature rising-resistance rise-temperature drop-resistance declines, and this circulation can automatically form a balance for being similar to static state, i.e., The self limiting temperature process of heater wire.

The ellipsoidal cross section of PTC layers 3, wraps up the flame retardant insulation 2 and described first metal-cored 11, described second Metal-cored 12, the PTC layers 3 are provided with heat-conducting layer 4 outside.The heat-conducting layer 4 includes the first heat-conducting part 41 and the second heat-conducting part 42, the ellipsoidal cross section of the first heat-conducting part 41 wraps up the PTC layers 3.The section of second heat-conducting part 42 is rectangle, For connecting first heat-conducting part 41 and the insulating barrier 6, first heat-conducting part 41 and second heat-conducting part 42 are by institute The heat directional transmissions of PTC layers 3 are stated to the inner side of the insulating barrier 6, during using the heater wire, by the insulating barrier 6 Pipeline is close in side, improves the heat conduction to pipeline.

Compared with heater wire of the prior art, heater wire described in the utility model realizes heater wire by setting PTC layers Self limiting temperature control, by setting heat-conducting layer, realize the directional transmissions of PTC layers of heat, reduce conduction of the heat to air side, The heat conduction to pipeline is improved, the heat utilization ratio of the heater wire is improved.

Further, the upside of first heat-conducting part 41 is provided with thermal insulation layer 5, and the section of thermal insulation layer 5 is in circular arc Shape.Reduce heat to transmit from first heat-conducting part 41 to the outside of insulating barrier 6, i.e., can further reduce heat to air The conduction of side, improves the heat conduction to pipeline, improves the heat utilization ratio of the heater wire.

The flame retardant insulation 2 is prepared using the flame-retardant insulating material of prior art.

The heat-conducting layer 4 is prepared using the Heat Conduction Material of prior art.

The thermal insulation layer 5 is prepared using the heat-barrier material of prior art.

The insulating barrier 6 is prepared using insulating materials, preferably improves crosslinked polyethylene or thermostable fluorine plastics.

As a kind of more preferable scheme, metal screen layer and restrictive coating can also be set (in figure not outside the insulating barrier 6 Draw), the metal screen layer is formed using aluminium foil or tinned copper wire braiding, the electromagnetism interference of enhancing heater wire at work Performance and impact wear resistance.

Embodiment two

From unlike embodiment one, referring to accompanying drawing 2, the heat-conducting layer 4 is additionally provided with the 3rd heat-conducting part 43, the described 3rd Heat-conducting part 43 is located at the bottom of second heat-conducting part 42, is vertically arranged with second heat-conducting part 42.3rd heat-conducting part 43 section is strip, and the junction of the insulating barrier 6 and the 3rd heat-conducting part 43 is respectively arranged with the line of form fit Road, the lines is zigzag or wavy.The setting of 3rd heat-conducting part 43 so that the heat-conducting layer 4 and the insulation The contact area increase of layer 6, increases the heat conduction efficiency of the heat-conducting layer 4 and the insulating barrier 6.

Embodiment three

From unlike embodiment two, referring to accompanying drawing 3, at least one cavity 61, Duo Gesuo is provided with the insulating barrier 6 State cavity 61 to be arranged in parallel, the cavity is vertically arranged with described first metal-cored 11, the cavity on the one hand with it is described heat-insulated Layer 5 forms dual barrier, effectively reduces conduction of the heat into air, on the other hand can also mitigate the weight of the heater wire Amount, increases the pliability of the heater wire so that the heater wire closely outer can be around on pipeline.

Preferred embodiment of the present utility model is the foregoing is only, is merely illustrative for the utility model, and It is nonrestrictive.Those skilled in the art understanding, can be to it in the spirit and scope that the utility model claim is limited Many changes are carried out, are changed, in addition it is equivalent, but fall within protection domain of the present utility model.

Claims (10)

1. a kind of heater wire of flat conductor structure, it is characterised in that including set from inside to outside metal conductor layer, it is fire-retardant absolutely Edge layer, PTC layers, heat-conducting layer and insulating barrier；The heat-conducting layer includes the first heat-conducting part and the second heat-conducting part；First heat conduction Portion's ellipsoidal cross section, is arranged at described PTC layers outside；The second heat-conducting part section is rectangle, and is arranged at described Between one heat-conducting part and the insulating barrier, for connecting first heat-conducting part and the insulating barrier.

2. heater wire as claimed in claim 1, it is characterised in that be provided with thermal insulation layer on the upside of first heat-conducting part, institute Heat-insulated layer cross section is stated in circular arc.

3. heater wire as claimed in claim 1 or 2, it is characterised in that the heat-conducting layer also includes the 3rd heat-conducting part, described the Three heat-conducting parts are located between second heat-conducting part and the insulating barrier, and the section of the 3rd heat-conducting part is in strip.

4. heater wire as claimed in claim 3, it is characterised in that the 3rd heat-conducting part is distinguished with the insulating barrier junction It is provided with the lines of form fit.

5. heater wire as claimed in claim 4, it is characterised in that the lines is zigzag or wavy.

6. heater wire as claimed in claim 2, it is characterised in that metal screen layer and sheath are provided with outside the insulating barrier Layer.

7. heater wire as claimed in claim 6, it is characterised in that the metal screen layer uses aluminium foil or tinned copper wire.

8. heater wire as claimed in claim 3, it is characterised in that at least one cavity is provided with the insulating barrier, described It is be arranged in parallel between cavity, the cavity is vertically arranged with the metal conductor layer.

9. heater wire as claimed in claim 1 or 2, it is characterised in that the metal conductor layer is metal-cored including at least two.

10. heater wire as claimed in claim 1 or 2, it is characterised in that the heater wire is in flat structure.