Flame-retardant rubber-sheathed flexible cable for underground coal mine mobile equipment and preparation method thereof

A mobile device and flexible cable technology, which is applied in the field of power feeder-rubber sheathed flexible cable, can solve the problems of unfavorable rescue of trapped underground personnel, large amount of smoke, and reduced light transmittance of underground passages, etc. The possibility of survival, the reduction of corrosive gas, and the effect of reducing irritation and damage to the human body

Inactive Publication Date: 2011-12-14
WUXI MINGZHU CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Some raw material components in the insulation, inner sheath and outer sheath rubber of the flame-retardant rubber-sheathed flexible cables currently used in coal mines have a large amount of smoke. In addition, if no smoke suppression measures are taken, they will release A large amount of smoke reduces the light transmittance (visibility) of the underground passage (roadway), which is not conducive to the escape of trapped people underground and the rescue of rescuers

Method used

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  • Flame-retardant rubber-sheathed flexible cable for underground coal mine mobile equipment and preparation method thereof
  • Flame-retardant rubber-sheathed flexible cable for underground coal mine mobile equipment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Inner sheath 3 and outer sheath 4 two-machine common head one-step extrusion method:

[0020] The first step is to select the fifth soft copper conductor that meets the provisions of the national standard GB / T 3956-1997 , for example, with a nominal cross-sectional area of ​​50mm 2 , on the extrusion vulcanization continuous production line, according to the insulation thickness specified in MT-818, the halogen-free, low-smoke, low-corrosion, flame-retardant insulating compound is tightly extruded on the selected soft copper conductor, and the vulcanization process is carried out in the vulcanization pipeline. Vulcanization, according to the vulcanization characteristics of the rubber material, the temperature of the saturated steam in the pipeline is 175~183℃, and the residence time in the pipeline is 5~8 minutes, forming figure 1 Halogen-free, low-smoke, low-corrosion, flame-retardant rubber insulating layer 2, this process is called insulation continu...

Embodiment 2

[0023] Embodiment 2, inner sheath 3 and outer sheath 4 two-machine serial connection one-step extrusion method:

[0024] The first step is to select the fifth soft copper conductor that meets the provisions of the national standard GB / T 3956-1997 , for example, with a nominal cross-sectional area of ​​50mm 2 , on the extrusion vulcanization continuous production line, according to the insulation thickness specified in MT-818, the halogen-free, low-smoke, low-corrosion, flame-retardant insulating compound is tightly extruded on the selected soft copper conductor, and the vulcanization process is carried out in the vulcanization pipeline. Vulcanization, according to the vulcanization characteristics of the rubber material, the temperature of the saturated steam in the pipeline is 175~183°C, and the residence time in the pipeline is 5~8 minutes, forming figure 1 Halogen-free, low-smoke, low-corrosion, flame-retardant rubber insulating layer 2, this process is called insulation ...

Embodiment 3

[0027] Embodiment 3: Inner sheath 3 and outer sheath 4 stand-alone two-step extrusion method:

[0028] The first step is to select the fifth soft copper conductor that meets the provisions of the national standard GB / T 3956-1997 , for example, with a nominal cross-sectional area of ​​50mm 2 , on the extrusion vulcanization continuous production line, according to the insulation thickness specified in MT-818, the halogen-free, low-smoke, low-corrosion, flame-retardant insulating compound is tightly extruded on the selected soft copper conductor, and the vulcanization process is carried out in the vulcanization pipeline. Vulcanization, according to the vulcanization characteristics of the rubber material, the temperature of the saturated steam in the pipeline is 175~183°C, and the residence time in the pipeline is 5~8 minutes, forming figure 1 Halogen-free, low-smoke, low-corrosion, flame-retardant rubber insulating layer 2, this process is called insulation continuous vulcani...

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Abstract

The invention discloses a flame-retardant rubber-sheathed flexible cable for underground mobile equipment in coal mines and a preparation method thereof. Composed of a flame-retardant rubber insulating layer, the cable core is coated with a high flame-retardant rubber inner sheath and a high flame-retardant rubber outer sheath in turn, and the flame-retardant rubber insulating layer, inner sheath and outer sheath are all made of EPDM-based rubber or ethylene-vinyl acetate-based rubber. The preparation method of the cable is to firstly make a wire core, then twist a plurality of wire cores into a cable core, and then use three different methods to sequentially extrude an inner sheath and an outer sheath outside the cable core. The invention has the advantages of not only greatly reducing the stimulation of smoke to the respiratory system of underground personnel and the damage to the human body, but also facilitating the rescue of rescuers, thereby increasing the possibility of surviving trapped personnel.

Description

technical field [0001] The invention relates to a cable, in particular to a power feeder-rubber-sheathed flexible cable for mobile equipment such as underground transportation in the coal mining industry, which is required to have the characteristics of halogen, low smoke, low corrosion and flame retardancy. Background technique [0002] The environmental conditions of underground coal mining are very harsh, and electrical accidents or gas explosions will lead to vicious fire accidents. Personal and property safety is seriously threatened. Rubber-sheathed cables are combustible objects with certain flame-retardant capabilities. At present, GB / T-12972 and MT-818 stipulate that the rubber-sheathed flexible cables used in coal mines will release smoke and corrode when the cable burns in a fire accident. This kind of smoke and gas will not only reduce the survival possibility of the trapped people underground, but also deteriorate the underground rescue environment, and at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/04H01B7/02H01B7/17H01B7/295H01B13/00H01B13/14H01B13/24
Inventor 薛建英
Owner WUXI MINGZHU CABLE
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