Rubber mine cable structure features
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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.
II: Characteristics of Rubber Jacket Cable Structure for Coal Mines The insulation layer requires sufficient electrical insulation performance 1. Rubber 2 with a rubber content of not less than 35 percent is used, and the insulation thickness is thicker than that of a general purpose rubber bushing cable 3. Electrical performance is good. Rubber and adopting a good rubber extrusion process (such as continuous extrusion line for rubber vulcanization)
Three: The shielding layer is made of semi-conductive rubber as the shielding layer, and the transition resistance should meet the standard requirements to ensure the reliable operation of the relay protection system in the accident state.
Four: coal mine rubber sheathed cable structure Features 1 core, the pad core to fully play in the cable when the impact of the buffer, the impact of the buffer, but can not over the ambassador outside diameter is too large. 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.
Five: 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.
6: Cover 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 dense and compact in structure, and each component should have relative slidability.
MY mine rubber cable (GB12972--91)
MY Rubber Jacket cable is used to exchange the additional voltage Uo/U is 3.6/6KV and below the copper core rubber insulated rubber sheathed mine soft cable.
Second, the use of features:
First, use:
1. Shearer flexible cable (UC, UCP), mobile rubber sheathed flexible cable (UY, UYP)
1) The extra voltage Uo/U is identified as 0.38/0.66KV, 0.66/1.14KV and 1.9/3.3KV.
2) The long-term allowable operating temperature of the cable conductor is 65°C.
3) The minimum bending radius of the cable is 6 times the cable diameter.
4) The yellow sheathed cable must not be exposed to sunlight for long periods of time.
2. Shearer shield monitoring reinforced soft cable (UCPJB)
1) The extra voltage Uo/U is 0.66/1.14KV
2) The long-term allowable operating temperature of the cable conductor is 90°C.
3) The minimum bending radius of the cable is 15 times the cable diameter.
4) Cables must not be exposed to sunlight for long periods of time.