CN2676557Y

CN2676557Y - A heating cable

Info

Publication number: CN2676557Y
Application number: CN 200420000656
Authority: CN
Inventors: 韩庆起; 史凤贤
Original assignee: Dino United Beijing Electronic Equipment Co ltd
Current assignee: Dinuowa (Beijing) Electronic Equipment Limited Company
Priority date: 2004-01-15
Filing date: 2004-01-15
Publication date: 2005-02-02
Anticipated expiration: 2014-01-15

Abstract

The utility model relates to a heating cable, which comprises power-supply line, a heater and a connection box, the power-supply line and the heater are fixed in the connection box after connecting, and the heater comprises heating line, an insulating layer, a shielding layer and a sheath layer. Wherein, the heater comprises two paralleling arranged heating lines, each heating line is twisted by multiple positive temperature coefficient copper nickel alloy wires, the heating line is covered with the insulating layer, the ends of the two heating lines are short jointed and formed a return circuit, the exterior of the heating line of the self return circuit is covered with the shielding layer, and the exterior of the shielding layer is covered with the sheath layer and is sealing insulated by the end insulation sleeve. The utility model heating cable has high extension strength, no dash current when cold start, high reproduction of the output power after multiple circulations, no restriction by construction environment, long service life and easy construction.

Description

A kind of heating cable

Technical field

The utility model relates to a kind of heating cable, especially a kind of indoor and outdoor heating system and antifreeze heating cable of pipe insulation of being used for.

Background technology

At present the main heating system of China gradually from traditional central heating mode with divide family gas-heating mode, changes to this emerging mode of floor heating.Floor heating is realized by lay heating cable under the floor.Present employed heating cable adopts usually to cover on the parallel copper busbar and mixes the heat generating core of forming with carbon black by high molecular polymer, is the heating cable of the additional heater type of electric conductor.Tensile strength is low because the high molecular polymer in the cable and the mixture of carbon black have, hardening during low temperature, the physical property that becomes fragile, the heating cable of this structure exists that low-temperature construction is limited, impulse current is excessive during cold start, and repeatedly the back reappearance is relatively poor, useful life short in the power output circulation, construction inconvenience.

Simultaneously, because existing cable is made up of core, individual layer insulation and shield sheath, in the course of processing of cable, be difficult to guarantee that core is not eccentric between two parties, when laying ground near the water source and crackle occurs, cause external moisture to be invaded probably, cable is destroyed in long-term use, leaky occurs, to produce great hidden danger, the threat to life property safety.

The utility model content

Technical problem to be solved in the utility model is, provide a kind of heating cable at the deficiencies in the prior art, non-impact current when tensile strength height, cold start, power output circulation repeatedly back reappearance height, be not subjected to construction environment condition restriction, long service life easy construction.

The technical scheme that the utility model solved realizes by the following technical solutions:

A kind of heating cable, comprise: power line, heater and terminal box, power line is connected the back sealing and fixing in terminal box with heater, described heater comprises heating line, insulating barrier, screen and restrictive coating, wherein, heater comprises two heating lines arranged side by side, every the heating line forms by the Contra wire of multiply positive temperature coefficient is stranded, heating line outsourcing insulating layer coating, article two, heating thread end short circuit constitutes the loop, have the outside screen that coats of heating line in loop of one's own, the outer sheathed restrictive coating of screen, and by overhang insulation cover sealed insulation.Article two, heating line arranged side by side is parallel to each other.

Terminal box comprises line box housing, and this shell material is a Merlon, be located in after power line and heater are welded to one another in the line box housing, and the sealing resin insulating material will weld sealing in good power line and the fixing online box housing of heater in the terminal box.

The shielding stratum reticulare that screen forms for the braiding of multiply copper cash, the multiply copper cash is the 12-24 thigh.

The shape of cross section of heater is a flat.

Therefore, advantage of the present utility model is: non-impact current when this heating cable tensile strength height, cold start, power output circulation repeatedly back reappearance height, be not subjected to construction environment condition restriction, long service life easy construction.

Description of drawings

Fig. 1 is the utility model heating cable overall structure schematic diagram;

Fig. 2 is the utility model power line structure schematic diagram;

Fig. 3 is the utility model heating element structure schematic diagram.

Embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is described in detail.

As shown in Figure 1, be the utility model heating cable overall structure schematic diagram.As can be known from Fig. 1, heating cable is tightly connected by terminal box 3 by heater 1 and power line 2 and forms, and the end of heater 1 is provided with insulating case 4 sealed insulations.Power line 2 and heater 1 firm welding also be located in the rectangle housing cavity of terminal box 3, and the material of this housing is a Merlon, and be again that the box body is firm with the sealing of ultrasonic wave flat welding process behind the sealing resin insulating material in the box.

As shown in Figure 2, be the utility model power line structure schematic diagram.The power line 2 of heating cable comprises copper conductor 9, power line insulating barrier 10 and power line sheath 11, and this power line insulating barrier 10 is the PVC material of 70 ℃ of heatproofs, and power line sheath 11 is the PVC material of 70 ℃ of heatproofs.

As shown in Figure 3, be the utility model heating element structure schematic diagram.The core component core of its heater 1, be two parallel, as to have the loop of one's own heaters 5, heater 5 is to form by the Contra wire of multiply positive temperature coefficient is stranded, in the insulating barrier 6 by crosslinked polyethylene Thermoplastic Elastic Material Used plastic pressure forming that can anti-125 ℃ of high temperature, insulating barrier 6 outer heater screens 7 use 16 strands of copper cash to be woven into network structure to two parallel heaters by plastic compression; Outermost heater restrictive coating 8 employing heatproofs are 90 ℃ PVC material.Two heaters, the 5 tail end short circuits of heater 1 and by tail end insulating case 4 sealed insulations, tail end insulating case 4 employing heatproofs are that 90 ℃ PVC material is injected into the body that its shape matches with heater 1 tail end, the one end injection moulding sealing of tail end insulating case 4, with glue tail end insulating case 4 and 8 sealings of heater restrictive coating are processed into one again after being linked in heater 1 tail end, the copper conductor 9 of power line 2 is drawn termination power, the heating cable Cross section Design is a flat, to increase the surface radiating area.

Heater 1 and power line 2 being welded to one another in terminal box 3, in conjunction with Fig. 2, shown in Figure 3, three copper conductors 9 in the power line 2 are respectively live wire, zero line and ground wire, wherein, live wire links to each other with two heating lines 5 that are parallel to each other of heater 1 respectively with zero line, ground wire then links to each other with the screen 7 of heater 1.After power line 2 and heater 1 firm welding, be located in the rectangle housing cavity of terminal box 3, adopt the sealing of ultrasonic wave flat welding process behind the sealing resin insulating material more firmly in the housing.

Need to prove at last: above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1, a kind of heating cable, it is characterized in that: comprising: power line, heater and terminal box, power line is connected the back sealing and fixing in terminal box with heater, described heater comprises the heating line, insulating barrier, screen and restrictive coating, wherein, heater comprises two heating lines arranged side by side, every the heating line forms by the Contra wire of multiply positive temperature coefficient is stranded, heating line outsourcing insulating layer coating, article two, heating thread end short circuit constitutes the loop, have the outside screen that coats of heating line in loop of one's own, the outer sheathed restrictive coating of screen, and by overhang insulation cover sealed insulation.

2, a kind of heating cable according to claim 1, it is characterized in that: described terminal box comprises line box housing, this shell material is a Merlon, be located in after power line and heater are welded to one another in the line box housing, the sealing resin insulating material will weld sealing in good power line and the fixing online box housing of heater in the terminal box.

3, a kind of heating cable according to claim 1 is characterized in that: the shielding stratum reticulare that described screen forms for the braiding of multiply copper cash.

4, a kind of heating cable according to claim 3 is characterized in that: described multiply copper cash is the 12-24 thigh.

5, a kind of heating cable according to claim 1 is characterized in that: the shape of cross section of described heater is a flat.

6, a kind of heating cable according to claim 1 is characterized in that: described two heating lines arranged side by side are parallel to each other.