CN201112005Y - Weather-resistant explosion-proof signal cable for coal mine gas monitoring system - Google Patents

Abstract

The utility model discloses a weather-resistant explosion-proof signal cable for a coal mine gas monitoring system which can realize stable signal transmission and resist external pressure and impact force in the technical field of cables. The cable core includes a cable core. For the wire core and sub-shielding layer, the sub-shielding layer is arranged outside a pair of wire cores; each of the above-mentioned wire cores includes a conductive wire core made of oxygen-free copper wire, and a high flame-retardant, The insulating layer is made of low-smoke, halogen-free polyolefin irradiated material; the total shielding layer is wrapped outside the cable core, and the flame-retardant glass rope is filled between the general shielding layer and the cable core group; the polyethylene inner layer is set outside the general shielding layer Sheath; the polyethylene inner sheath is provided with an armored layer made of galvanized steel wire; the outer armored layer made of galvanized steel wire is provided with a flame-retardant non-woven wrapping layer; the An outer sheath made of weather-resistant, smoke-suppressing type halogen-free retardant is provided outside the flame-retardant non-woven fabric wrapping layer.

Description

Weather-resistant explosion-proof signal cable for coal mine gas monitoring system

technical field

The utility model belongs to the technical field of cables, in particular to a weather-resistant explosion-proof signal cable for a coal mine gas monitoring system.

Background technique

With the rapid development of mining of mineral resources such as petroleum, chemical industry, and coal mines, underground operations continue to deepen, and complex and harsh environments such as flammable and explosive are also increasing day by day, resulting in the continuous improvement of mine electrical automation equipment and the continuous enhancement of safety system functions. . Correspondingly, the requirements for the use of mine signal cables have also increased, not only requiring them to be suitable for stable signal transmission in various harsh environments, but also requiring them to have a strong ability to resist external pressure and impact. However, the mining cables of the prior art cannot achieve the above-mentioned excellent properties.

Utility model content

The technical problem to be solved by the utility model is to provide a weather-resistant explosion-proof signal cable for a coal mine gas monitoring system that can realize stable signal transmission and resist external pressure and impact force in a harsh mine environment.

The utility model includes a cable core, the cable core includes two wire cores and a sub-shielding layer, and the sub-shielding layer is arranged outside the two wire cores; each of the above-mentioned wire cores includes a conductive wire core made of oxygen-free copper wire, and a set Insulation layer made of highly flame-retardant, low-smoke, halogen-free polyolefin irradiated material outside the conductive core; the total shielding layer is wrapped outside the cable core, and the flame retardant is filled between the total shielding layer and the cable core group Glass wire rope; a polyethylene inner sheath is arranged outside the total shielding layer; an armor layer made of galvanized steel wire is arranged outside the polyethylene inner sheath; an armor layer made of galvanized steel wire is arranged outside the armor layer Flame-retardant non-woven fabric wrapping layer; the flame-retardant non-woven fabric wrapping layer is provided with an outer sheath made of weather-resistant, smoke-suppressing type halogen-free flame-retardant fuel.

The conductor of the utility model adopts high-quality oxygen-free copper wire, which has the advantages of low DC resistance, high carrying capacity, small resistance difference, and good conductive effect, which ensures the excellent electrical performance and signal transmission effect of the cable; the insulating layer adopts high-resistance Combustible, low-smoke, halogen-free polyolefin irradiation material can reduce the distributed capacitance and distributed inductance of the cable and improve the explosion-proof performance of the cable under the condition of increasing the insulation thickness; Effectively prevent the interference of the external electromagnetic field and make the signal transmission more reliable. In the case of multiple pairs of wire cores, each pair of wire cores can be set with different multi-twisting pitches to weaken the interference between each pair of wire cores and make the cable The anti-crosstalk effect is good to ensure the quality of signal transmission; the galvanized steel wire armor is used as the protective layer to enhance the tensile performance of the cable, and improve the anti-collision, impact and tensile properties of the cable when it is laid in shafts and inclined shafts; the outer protection The sleeve adopts weather-resistant, smoke-suppressing type halogen-free retardant fuel, which makes the product have good flame retardant performance and strong weather resistance, and is suitable for the harsh environment in the mine.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Detailed ways

As shown in Figure 1, the utility model includes three groups of cable cores 1, each group of cable cores 1 includes a pair of wire cores 1-1 and a sub-shielding layer 1-2, and the sub-shielding layer 1-2 is arranged on a pair of wire cores 1 -1 outside.

Each of the above wire cores 1-1 includes a conductive wire core 1-1-1 made of oxygen-free copper wire, and a high flame-retardant, low-smoke, halogen-free poly Insulation layer made of olefin irradiated material 1-1-2.

The total shielding layer 2 is wrapped around the three groups of cable cores 1, and the flame-retardant glass rope 3 is filled between the total shielding layer 2 and the cable core groups 1.

A polyethylene inner sheath 4 is arranged outside the total shielding layer 2 .

The polyethylene inner sheath 4 is provided with an armor layer 5 made by winding galvanized steel wires.

The armor layer 5 made of galvanized steel wire is provided with a flame-retardant non-woven wrapping layer 6 outside.

The flame-retardant non-woven fabric is provided with an outer sheath 7 made of weather-resistant, smoke-suppressing halogen-free flame retardant around the wrapping layer 6 .

Claims (1)

1, the coal mine gas monitoring and controlling system explosion-proof signal cable of weather resistant, it is characterized in that: comprise cable core, cable core comprises a pair of core and sub-shield, sub-shield is arranged in outside two cores; Above-mentioned each core comprises the conductor wire core of being made by copper free wire, and is arranged on the outer insulating barrier of being made by high flame retardant, low cigarette, halogen-free polyolefin irradiation material of conductor wire core; Total screen is wrapped in outside the cable core, and fills fireproof glass silk rope between total screen and cable core group; Total screen is provided with the polyethylene inner sheath outward; The outer setting by zinc-coated wire of described polyethylene inner sheath twined the armour of making; The described armour of being made by the zinc-coated wire winding is provided with flame retardant type nonwoven fabrics lapping layer outward; Described flame retardant type nonwoven fabrics lapping layer is provided with by oversheath weather-proof, that the smoke-inhibition type halogen-free flame-proof material is made outward.

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