CN202067594U

CN202067594U - Highly-cold preheating laid power cable

Info

Publication number: CN202067594U
Application number: CN2011201555697U
Authority: CN
Inventors: 吉启荣; 王敏; 朱崤
Original assignee: SIAIT CABLE CO Ltd
Current assignee: SIAIT CABLE CO Ltd
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2011-12-07
Anticipated expiration: 2021-05-16

Abstract

The utility model discloses a highly-cold preheating laid power cable. An insulating wire core of the cable comprises a conductor and a crosslinked polythene insulating layer, wherein the conductor is formed by stranding and compressing copper wires; the crosslinked polythene insulating layer is extruded outside the conductor; a plurality of insulating wire cores are stranded to form a cable core; and a cabling belt layer, a woven heating conductor, a belt binding layer and an outer protective layer are arranged outside the cable core in sequence. A constantan wire is used for heating; the knitting tightness of the constantan wires is 30-50 percent in consideration of different external diameters of the cable; the heating power is 15-30W per meter; and the cable can be effectively prevented from being damaged due to material cracking.

Description

High and cold preheating power cable laying

Technical field:

The utility model relates to a kind of cable, specifically a kind of high and cold preheating power cable laying.

Background technology:

The northern area of China is in the winter time the time, and the lowest temperature is at-10 ℃-40 ℃, and conductor generates heat to 30 ℃～90 ℃ during the cable operation, thereby winter operation is no problem.

And the power cable jacket material all is pvc material and LSOH anti-flaming sheath material, and temperature is laid in these two kinds of materials installations all to be needed more than 0 ℃, thereby can not lay in the winter time, sheath becomes fragile, when particularly the cable minor radius was crooked, serious cracking can not guarantee the cable service quality; And the north of china in winter time is very long, and this plan that has influenced cable is is greatly installed and used, and the economic construction and the electric energy of all items are undivided, there is not electric energy, many work all can't be carried out, and cable can not be installed and cause stopping for a long time of construction, and are bigger to the economic benefit influence.

Summary of the invention:

For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of high and cold preheating power cable laying, the heating of employing constantan wire, the television cable external diameter varies in size, the constantan wire count is (30～50) %, every meter heating power is (15～30) W, can effectively prevent the cable bad that the material cracking causes.

The utility model technical solution problem adopts following technical scheme:

High and cold preheating power cable laying, the cable insulation core comprises by stranded conductor that forms and the crosslinked polyetylene insulated layer that extrudes outside described conductor of compressing of copper wire, the edge cores that thoroughly do away with are twisted into cable core more, be provided with stranding belting layer, braiding heater, band successively and tighten layer and outer jacket outside described cable core.

Design feature of the present utility model also is:

Described stranding belting layer forms by the non-hygroscopic band is wrapped.

Described braiding heater is that the thin constantan wire braiding of 0.1～0.2mm forms, and count is 30%～50%.

Described band is tightened layer by overlapping wrapped formation of thin band.

Described outer jacket adopts polyvinyl chloride or the overlapping wrapped formation of LSOH anti-flaming sheath material.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model is the power cable that a kind of extremely frigid zones uses, because power cable lays environment out of doors, northern severe cold areas uses, and gives the heating of insulating barrier and oversheath, can effectively prevent the cable bad that the material cracking causes;

2, the utility model heater contacts closely with the insulation outer jacket, and the heat transfer efficiency height can effectively reduce energy loss;

3, the construction of cable is simple, only increases the thin heater layer of one deck, and external diameter increases little, and cost increases little;

4, adopt the constantan wire heating, the television cable external diameter varies in size, and count is (30～50) %, and every meter heating power is (15～30) W.

Description of drawings:

Fig. 1 is the radial cross-section of the utility model cable.

Number in the figure: 1 conductor, 2 insulating barriers, 3 stranding belting layers, 4 braiding heaters, 5 bands are tightened layer, 6 outer jackets.

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment:

Embodiment: referring to Fig. 1, the high and cold preheating power cable laying of present embodiment, the cable insulation core comprises by stranded conductor 1 that forms and the crosslinked polyetylene insulated layer 2 that extrudes outside conductor 1 of compressing of copper wire, four thoroughly do away with the edge cores is twisted into cable core, is provided with stranding belting layer 3, braiding heater 4, band successively and tightens layer 5 and outer jacket 6 outside cable core.

In concrete the enforcement, conductor 1 is stranded compact conductor; Insulating barrier 2 is a crosslinked polyethylene insulation material; Stranding belting layer 3 forms by the non-hygroscopic band is wrapped.Braiding heater 4 is formed by the thin constantan wire braiding of 0.1～0.2mm, and count is tightened layer 5 with the overlapping wrapped formation band of thin band afterwards 30%～50%, and outer jacket 6 adopts polyvinyl chloride or the overlapping wrapped formation of LSOH anti-flaming sheath material.

Claims

1. high and cold preheating power cable laying, it is characterized in that the cable insulation core comprises by copper wire is stranded compresses the conductor (1) that forms and extrudes crosslinked polyetylene insulated layer (2) outside described conductor (1), the edge cores that thoroughly do away with are twisted into cable core more, be provided with stranding belting layer (3), braiding heater (4), band successively and tighten layer (5) and an outer jacket (6) outside described cable core.

2. high and cold preheating power cable laying according to claim 1 is characterized in that described stranding belting layer (3) forms by the non-hygroscopic band is wrapped.

3. high and cold preheating power cable laying according to claim 1 is characterized in that, described braiding heater (4) is that the thin constantan wire braiding of 0.1～0.2mm forms, and count is 30%～50%.

4. high and cold preheating power cable laying according to claim 1 is characterized in that, described band is tightened layer (5) by overlapping wrapped formation of thin band.

5. high and cold preheating power cable laying according to claim 1 is characterized in that, described outer jacket (6) adopts polyvinyl chloride or the overlapping wrapped formation of LSOH anti-flaming sheath material.