Structural characteristics of mining rubber cable

One: conductive core
Flexibility requires the use of an electric drill cable. The cable of the mining machine is the highest; the wire structure adopts the following measures:
1, the use of softer fine diameter copper single wire, small pitch beam, rewinding. The bending and twisting of the entire cable is also affected by the insulation and jacket structure. Therefore, the finer the monofilament, the smaller the pitch, the better.
2, the use of the same direction twisted and rewinding can improve the flexibility.
3, In order to facilitate the relative sliding of the wire in the insulating layer and to facilitate the installation and maintenance. The monofilaments of the cable conductors of the drill cable and the small cross-section of the mining machine shall be tin-plated, and the cables of the large-section mining machine shall be insulated with wrapping tapes outside the conductors.
Two: Insulation requires sufficient electrical insulation
1, the use of rubber containing no less than 35 percent of the rubber
2, the insulation thickness is thicker than general rubber sleeve cable
3, using a good electrical rubber, and using a good rubber extrusion process (such as extrusion rubber vulcanized continuous production line)
Three: shielding layer
The use of semi-conductive rubber as the shielding layer should make its transition resistance meet the standard requirements to ensure reliable operation of the relay protection system in the event of an accident.
Four: pad core
1, The cushion core should fully play the buffering effect when the cable receives the punching and squeezing, but it can not over-extend the ambassador's outer diameter. It is required that the design properly fill the gap between the insulating cores.
2, the mechanical properties should not be lower than the requirements of insulating rubber.
3, can not produce adhesion with the insulated core.
V: Cable structure
1, to use a smaller pitch multiplier to improve the flexibility of the cable.
2. In order to ensure the mechanical strength of the ground core, the ground core section is larger than the general cable, and the small section product adopts the same section as the main line pipe.
3, The control wire core will be separately twisted to form a group and then be cabled together with the main wire core.
Sixth: sheath
1, requires sufficient mechanical strength, good wear resistance. Underground cables require flame retardance. Therefore, neoprene is used and the gel content is not less than 50%.
2,6KV mobile rubber sheathed cables require sufficient electrical insulation to improve the corona cracking resistance of the sheath.
Seven: The cable should be compact and compact, and each component should have relative slidability.

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