CN204130203U

CN204130203U - A kind of explosion-proof type intrinsic safety control cables

Info

Publication number: CN204130203U
Application number: CN201420625762.6U
Authority: CN
Inventors: 巫和宽; 黄立群; 谷仁俊
Original assignee: ANHUI HUANYU CABLE GROUP Co Ltd
Current assignee: ANHUI HUANYU CABLE GROUP Co Ltd
Priority date: 2014-10-28
Filing date: 2014-10-28
Publication date: 2015-01-28
Anticipated expiration: 2024-10-28

Abstract

The utility model discloses a kind of explosion-proof type intrinsic safety control cables, relate to field of cable technology.It comprises insulated wire cores, screen and low-smoke halogen-free polyolefin sheath; Described insulated wire cores extrudes oxygen-free copper conductor by the crosslinked polyetylene insulated layer of extrusion molding to form, two insulated wire cores are twisted into one group to core, to the outer fire-retardant band I of hard-pressed bale of core, fire-retardant band I weaves high density copper wire sub-shield, one or two or more sets of adds packing material to core and is combined into circular cable core, the outer fire-retardant band II of hard-pressed bale of cable core, on fire-retardant band II, coated copper moulds the total screen of composite membrane band, the outer extrusion molding low-smoke halogen-free polyolefin sheath of total screen outer fire-retardant band III of hard-pressed bale, fire-retardant band III.The utility model has environmental protection, low electric capacity, low inductance, shielding properties is excellent, and the multiple good characteristics such as anti-electromagnetism, radio frequency interference performance and anti-power plant coupling performance are strong, in conjunction with support circuit and equipment use, effectively can eliminate electric spark and thermal effect release, explosion-proof performance is excellent.

Description

A kind of explosion-proof type intrinsic safety control cables

Technical field

The utility model relates to cable, is specifically related to a kind of explosion-proof type intrinsic safety control cables.

Background technology

General general control cable, from system wiring engineering viewpoint, owing to there is distributed capacitance and distributed inductance, makes stube cable become energy-storage travelling wave tube.They are in electric signal transmitting procedure inevitably stored energy, open circuit or short circuit is there is once when circuit, these energy storage will discharge with the form of electric spark or thermal effect, in some specific inflammable and explosive environment and region, easily form larger potential safety hazard.Electric signal transmission is done under explosion-proof type intrinsic safety control cables is mainly applied to explosion-proof occasion and environment.Main method is exactly carry out the operating current of limiting circuit under certain degree by the technique of cable and technical controlling and corollary equipment, and spark would not be caused like this to cause blast.

Utility model content

In order to solve above-mentioned technological deficiency, the utility model provides a kind of explosion-proof type intrinsic safety control cables.

Scheme of the present utility model is as follows: a kind of explosion-proof type intrinsic safety control cables, comprises insulated wire cores, screen and low-smoke halogen-free polyolefin sheath; Described insulated wire cores extrudes oxygen-free copper conductor by the crosslinked polyetylene insulated layer of extrusion molding to form, two insulated wire cores are twisted into one group to core, to the outer fire-retardant band I of hard-pressed bale of core, fire-retardant band I weaves high density copper wire sub-shield, one or two or more sets of adds packing material to core and is combined into circular cable core, the outer fire-retardant band II of hard-pressed bale of cable core, on fire-retardant band II, coated copper moulds the total screen of composite membrane band, the outer extrusion molding low-smoke halogen-free polyolefin sheath of total screen outer fire-retardant band III of hard-pressed bale, fire-retardant band III.

Described sub-shield adopts the high density proof copper-wire braided being greater than 85% to form, and described total screen is that copper is moulded composite membrane band lap wound and formed.

Described total screen inner conducting layer adds folder category-B conductor copper wire ground wire.

Above-mentioned three fire-retardant bands are anti-flammability PVC band.

The beneficial effects of the utility model: the utility model has environmental protection, low electric capacity, low inductance, shielding properties is excellent, the multiple good characteristics such as anti-electromagnetism, radio frequency interference performance and anti-power plant coupling performance are strong, in conjunction with support circuit and equipment use, effectively can eliminate electric spark and thermal effect release, explosion-proof performance is excellent, and low-smoke halogen-free polyolefin sheath is easy to Installation and Debugging and the isolation of cable in explosion-proof environment.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Wherein: 1, oxygen-free copper conductor; 2, the crosslinked polyetylene insulated layer of extrusion molding; 3, fire-retardant band I; 4, sub-shield; 5, cable core; 6, fire-retardant band II; 7, ground wire; 8, total screen; 9, fire-retardant band III; 10, low-smoke halogen-free polyolefin sheath.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further;

As shown in Figure 1, a kind of explosion-proof type intrinsic safety control cables, comprises insulated wire cores, screen and low-smoke halogen-free polyolefin sheath 10, described insulated wire cores extrudes oxygen-free copper conductor 1 by the crosslinked polyetylene insulated layer 2 of extrusion molding to form, two insulated wire cores are twisted into one group to core, to the outer fire-retardant band I3 of hard-pressed bale of core, fire-retardant band I3 weaves high density copper wire sub-shield 4, one or two or more sets of adds packing material to core and is combined into circular cable core 5, the outer fire-retardant band II6 of hard-pressed bale of cable core, on fire-retardant band II6, coated copper moulds the total screen 8 of composite membrane band, the fire-retardant band III9 of the outer hard-pressed bale of total screen 8, the outer extrusion molding low-smoke halogen-free polyolefin sheath 10 of fire-retardant band III9, low-smoke halogen-free polyolefin sheath 10 adopts the light blue low smoke, zero halogen polyolefine material of environment-friendly type.

Described sub-shield 4 adopts the high density proof copper-wire braided being greater than 85% to form, and described total screen 8 is moulded composite membrane band lap wound for copper and formed.

Described total screen 8 inner conducting layer adds folder category-B conductor copper wire ground wire 7.

Above-mentioned three fire-retardant bands are anti-flammability PVC band.

The utility model cable has the feature of low electric capacity and low inductance, owing to have employed the double-decker of sub-shield and total screen, make it have fabulous shielding properties, anti-external electromagnetic field interference, the ability of anti-radio frequency interference and anti-field coupled is all stronger, thus can also be as the rated voltage in chemistry and the industrial department explosive environments such as oil 450/750 and the intrinsically safe circuit such as following distributing system and automatic detection and control system in as the transmission line of small-signal, oil can be widely used in, chemical industry, electric power, gas engineering, there is the occasion of explosion hazard in mines etc. and other anti-explosion safety requires higher occasion.

Although give detailed description and explanation to embodiment of the present utility model above; but what should indicate is; we can carry out various equivalence according to conception of the present utility model to above-mentioned execution mode and change and amendment; its function produced do not exceed that specification contains yet spiritual time, all should within protection range of the present utility model.

Claims

1. an explosion-proof type intrinsic safety control cables, comprises insulated wire cores, screen and low-smoke halogen-free polyolefin sheath; It is characterized in that: described insulated wire cores extrudes oxygen-free copper conductor by the crosslinked polyetylene insulated layer of extrusion molding to form, two insulated wire cores are twisted into one group to core, to the outer fire-retardant band I of hard-pressed bale of core, fire-retardant band I weaves high density copper wire sub-shield, one or two or more sets of adds packing material to core and is combined into circular cable core, the outer fire-retardant band II of hard-pressed bale of cable core, on fire-retardant band II, coated copper moulds the total screen of composite membrane band, the outer extrusion molding low-smoke halogen-free polyolefin sheath of total screen outer fire-retardant band III of hard-pressed bale, fire-retardant band III.

2. a kind of explosion-proof type intrinsic safety control cables according to claim 1, is characterized in that: described sub-shield adopts the high density proof copper-wire braided being greater than 85% to form, and described total screen is that copper is moulded composite membrane band lap wound and formed.

3. a kind of explosion-proof type intrinsic safety control cables according to claim 1, is characterized in that: described total screen inner conducting layer adds folder category-B conductor copper wire ground wire.

4. a kind of explosion-proof type intrinsic safety control cables according to claim 1, is characterized in that: above-mentioned three fire-retardant bands are anti-flammability PVC band.