CN203787127U - Environment-friendly intrinsic safety type instrument cable - Google Patents

Abstract

The utility model discloses an environment-friendly intrinsic safety type instrument cable. The cable comprises conductors, main wire cores, branch wire cores and a center wire core. Each conductor is pressed and coated by an insulation layer made of a pressed ceramic silicone rubber material, and the conductor and the insulation layer form an insulation wire core. Three insulation wire cores are stranded and coated by a halogen-free flame retardation belting layer and a tin-coated copper filament braiding layer, so as to form a main wire core. Each branch wire core comprises insulation wire cores coated by a tin-coated copper filament braiding layer I. The center wire core comprises a pair of insulation wire cores coated by a halogen-free flame retardation belting layer II and a tin-coated copper filament braiding layer. The main wire cores, the branch wire cores and the center wire core form a cable core, and the cable core is coated by a halogen-free low-smoke antiflaming glass fiber belt total belting layer, a total shielding layer, an armor layer and an outer protective jacket. The outer protective jacket is pressed and made of a ceramic silicone rubber material. The cable is high in environmental protection performance and fireproof performance, low in capacitance and inductance, and stable in signal transmission.

Description

A kind of environment-friendly type intrinsic safety type instrument cable

Technical field

The utility model belongs to electric wire field, relates to a kind of environment-friendly type intrinsic safety type instrument cable.

Background technology

The signal transmission of the current distributing system in industrial and mining enterprises such as electric power, metallurgy, chemical industry, electronic computer system, automated system and detecting instrument, instrument etc. connect with common intrinsically-safe instrument cable, substantially adopt traditional polyethylene insulation or polyvinyl chloride insulation shield type intrinsically-safe instrument cable.This cable is because adopting the polyethylene with superior electrical performances such as dielectric constant are little, dielectric loss is little, insulation resistance is large as insulating material, so cable has low electric capacity, inductance and stablizes good transmission performance.But along with some problems that are widely used of this cable also occur thereupon, it is mainly the occasion at ask for something cable with flame-retardant performance, because the insulation of this cable adopts polythene material, but polythene material is combustible material, so the flame-retardant performance of cable does not often reach requirement, the potential safety hazard while causing these occasions of cable to use increases.Adopt flame-proof polyvinyl chloride material, but because pvc material is the fire resistance material that contains halogen, occur once fire, cable is burned can produce a large amount of smog, and also has halogen-containing poisonous corrosive gas to disengage.So not only be unfavorable for the expansion of rescue work, and halogen-containing toxic gas causes serious actual bodily harm to trapped personnel.Generally there is accurate instrument and equipment the application scenario of intrinsic safety type instrument cable in addition, and these corrosive gass that contain halogen can cause serious sour corrosion to equipment, makes the performance of whole cable not reach requirement.

Utility model content

For overcoming above-mentioned deficiency, the utility model cable has the dangerous situation that fire occurs to use the problem existing at some, provide one to there is high-environmental performance and high fire protecting performance, and there is the environment-friendly type intrinsic safety type instrument cable of the stabilization signal transfer function of low electric capacity, low inductance.

Scheme of the present utility model is as follows: a kind of environment-friendly type intrinsic safety type instrument cable, comprise conductor, master core, point core and middle core, and it is characterized in that: conductor extrudes employing ceramic silastic material outward and extrudes the insulating barrier formation insulated wire cores of making; The three stranded rear wrapped halogen-free flameproof belting layers of insulated wire cores, tincopper fuse wire braided armors form master core; Described point core is made up of the outer wrapped tincopper fuse wire braided armor I of insulated wire cores; Described middle core is made up of the outer wrapped halogen-free flameproof belting layer II of a pair of insulated wire cores, tincopper fuse wire braided armor II; After master core, point core and middle core formation cable core, wrapped LSOH anti-flaming glass fibre belt overall budget belt, total screen, armour and employing ceramic silastic material extrude the external sheath layer of making.

Further, described conductor adopts the 5th class flexible conductor is stranded and makes.

Further, described cable core and general belt interlayer use low smoke, zero halogen glass fiber rope to fill.

The insulating material of the utility model cable, sheath material adopt new ceramics SiClx rubber-covered material, ensure that cable has stable signal transfer functions, superior at flame-retardant aspect of performance, at normal temperatures, possess the characteristic of silicon rubber, running into after 430 DEG C of flame combustions, the barrier layer that can form the hard similar ceramic-like of one deck, can intercept the burning of flame, so flame-retardant performance is improved, and in the time of burning, the amount of being fuming is low, disengages without the corrosive gas that contains halogen.

The auxiliary packing material of cable and band material are to adopt halogen-free flameproof glass fiber material, not only have good fire resistance, and are all not halogen-containing environment-friendly materials.The utility model provides a kind of novel computer and instrument cable that has high flame retardant, Halogen, low cigarette environmental-protecting performance and have simultaneously the signal transfer functions of the low inductance stabilization of low electric capacity.

Brief description of the drawings

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

Embodiment

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

A kind of environment-friendly type intrinsic safety type instrument cable, comprises conductor, master core, point core 5 and middle core 6, and conductor 1 is outer to be extruded and adopt ceramic silastic material to extrude the insulating barrier 2 of making to form insulated wire cores; The three stranded rear wrapped halogen-free flameproof belting layers 3 of insulated wire cores, tincopper fuse wire braided armors 4 form master core; Described point core is made up of the outer wrapped tincopper fuse wire braided armor I of insulated wire cores; Described middle core is made up of the outer wrapped halogen-free flameproof belting layer II of a pair of insulated wire cores, tincopper fuse wire braided armor II; After master core, point core and middle core formation cable core, wrapped LSOH anti-flaming glass fibre belt overall budget belt 7, total screen 8, armour 9 and employing ceramic silastic material extrude the external sheath layer 10 of making.

Described conductor 1 adopts the 5th class flexible conductor is stranded to be made.Between described cable core and overall budget belt 7, use low smoke, zero halogen glass fiber rope to fill.The fire resistance of the utility model cable reaches the burning test that GB/T19216 specifies, the experimental condition that the low smoke performance of cable specifies according to GB/T17651, its light transmittance is not less than 60%, the Halogen performance of cable is according to the experimental condition of GB/T17650, PH value is greater than 4.3, and conductance is less than 10 μ s/mm.When the mutual capacitance 1kHZ of cable, be not more than 90pF/m, inductance resistance ratio is not more than 35 μ H/ Ω.

Although above embodiment of the present utility model has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned execution mode according to conception of the present utility model and change and amendment; when its function producing does not exceed spiritual that specification and accompanying drawing contain yet, all should be within protection range of the present utility model.

Claims (3)

1. an environment-friendly type intrinsic safety type instrument cable, comprises conductor, master core, point core and middle core, it is characterized in that: conductor extrudes employing ceramic silastic material outward and extrudes the insulating barrier formation insulated wire cores of making; The three stranded rear wrapped halogen-free flameproof belting layers of insulated wire cores, tincopper fuse wire braided armors form master core; Described point core is made up of the outer wrapped tincopper fuse wire braided armor I of insulated wire cores; Described middle core is made up of the outer wrapped halogen-free flameproof belting layer II of a pair of insulated wire cores, tincopper fuse wire braided armor II; After master core, point core and middle core formation cable core, wrapped LSOH anti-flaming glass fibre belt overall budget belt, total screen, armour and employing ceramic silastic material extrude the external sheath layer of making.

2. a kind of environment-friendly type intrinsic safety type instrument cable according to claim 1, is characterized in that, described conductor adopts the 5th class flexible conductor is stranded to be made.

3. a kind of environment-friendly type intrinsic safety type instrument cable according to claim 1, is characterized in that, described cable core and general belt interlayer use low smoke, zero halogen glass fiber rope to fill.