MY, MYP, MYQ mining rubber cable Structural features:
One: conductive core. The softness requires the electric drill cable and the mining machine cable to be the highest; the wire structure takes the following measures Surface Thermocouple probe:
1, using a softer thin-diameter copper single wire, bundled at a small pitch, re-twisted. The bending torsion of the entire cable is also affected by the insulation and the sheath structure. Therefore,Platinum Rhodium Thermocouple the thinner the monofilament, the smaller the pitch, the better.
2, the use of the same direction bunching and re-twisting can improve the softness.
3, in order to facilitate the relative sliding of the wire in the insulation layer and facilitate installation and maintenance. The electric drill cable and the small section of the mining machine cable wire monofilament should be tinned, and the large section mining machine cable is also insulated with a wrapping tape outside the wire.
Second: MY, MYP, MYQ mining rubber cable insulation layer requires sufficient electrical insulation properties
1, Thermocouple with Temperature Transmitter using rubber with a glue content of not less than 35 percent
2, the insulation thickness is thicker than the general rubber cable
3, using a good electrical rubber, and using a good rubber extrusion process (such as extruded rubber vulcanization continuous production line)
Three: MY, MYP, MYQ mining rubber cable shielding layer
The semi-conductive rubber is used 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: MY, MYP, MYQ mining rubber cable the core
1, Armored thermal resistance the core should be fully used to buffer the cable when it receives punching and squeezing, and not too large to make the outer diameter too large. The design is required to properly fill the gap between the insulated core wires.
2, the mechanical properties should not be lower than the requirements of the insulating rubber.
3, can not cause adhesion to the insulated core.
Five: MY, MYP, MYQ mining rubber cable structure
1, to use a smaller pitch multiple to improve the softness of the cable.
2. In order to ensure the mechanical strength of the ground core, the ground core section is larger than the common cable, and the small section product adopts the same section as the main line.
3. Wear-resistant thermocouple The control core is individually twisted into a group and then cabled together with the main core.
Six: MY, MYP, MYQ mining rubber cable protective layer
1, required to have sufficient mechanical strength, good wear resistance. Downhole cables require flame retardancy. Therefore, neoprene is used, and the amount of glue is not less than 50%.
2, 6KV mobile rubber cable requires the sheath to have sufficient electrical insulation to improve the corona crack resistance of the sheath.
Seven: MY, MYP, MYQ mining rubber cable The cable should be dense and compact, and each component has relative sliding properties.
MY mining rubber cable (GB12972–91)
MY rubber cable is used to exchange copper core rubber insulated rubber sheathed mine soft cable with extra voltage Uo/U of 3.6/6KV and below Assembly Thermocouple.
Second, MY, MYP, MYQ mining rubber cable use of features:
First, use:
1. Shearer soft cable (UC, UCP), moving rubber sheathed flexible cable (UY, UYP)
1) The extra voltage is Uo/U and is identified as 0.38/0.66KV, 0.66/1.14KV, and 1.9/3.3KV.
2) The long-term allowable temperature of the cable conductor is 65 °C.
3) The minimum bending radius of the cable is 6 times the diameter of the cable.
4) The yellow sheathed cable must not be exposed to light for a long time.
2. Shearer shield monitoring enhanced flexible cable (UCPJB)
1) armored thermocouple The extra voltage Uo/U is 0.66/1.14KV
2) The long-term allowable temperature of the cable conductor is 90 °C.
3) The minimum bending radius of the cable is 15 times the diameter of the cable.
4) The cable must not be exposed to light for a long time.
3. Shearer metal shielded flexible cable (UCPT)
1) The extra voltage Uo/U is 0.66/1.14KV
2) high temp k type thermocouple The long-term allowable temperature of the cable conductor is 90 °C.
3) The minimum bend radius of the cable is 6 times the diameter of the cable.
4. Shielded monitoring flexible cable (UYPJ), shielded rubber sheathed flexible cable (UYP, UYPT, UYPD)
1) The extra voltage Uo/U is 3.6/6KV.
2) tc thermocouple The long-term allowable temperature of the cable conductor is 90 °C.
3) The minimum bending radius of the cable is 6 times the diameter of the cable.
4) The cable must not be exposed to light for a long time.
5) The ground wire of the cable must be grounded.
5, mining electric drill cable (UZ, UZP), mining mobile light rubber flexible cable (UYQ)
1) The extra voltage Uo/U is 0.3/0.5KV
2) The minimum bending radius of the cable is 6 times the diameter of the cable.
3)k type thermocouple The long-term allowable temperature of the cable conductor is 65 °C.
MYP mining cable use range
MY-0.66/1.14 mobile rubber flexible cable for coal mine, used for power connection of various underground coal mining equipment.
MYP mining cable production standard
The latest production standard number of MY-0.66/1.14 cable is MT818.5-2009.
MYP mining cable specifications
The power core insulation shield is made of a semi-conductive extruded layer or a semi-conductive strip. Single core cable cross-sections range from 4 square millimeters to 400 square millimeters. The three-core ground cable cross-section from 4 square millimeters to 150 square millimeters.
MYP mining cable working conditions
Rated voltage (U0/U)O 0.66/1.14. The minimum bending radius of the cable is 6 times the diameter of the cable.
The ground wire of the cable should be well grounded.
Mine mobile rubber sheathed flexible cable (UY, UYP) implementation standard GB12972.5-91
Applicable characteristics:
1, the rated voltage is 0.38/0.66KV and 0.66/1.14KV respectively.
2, the long-term allowable operating temperature of the cable conductor is 65 degrees.
3, the minimum bending radius of the cable is 6 times the diameter of the cable.
4. The yellow sheathed cable must not be exposed to sunlight for a long time.
Model and use
UY-0.38/0.66 Mine mobile rubber sheathed soft cable Rated voltage 0.38/0.66KV power connection of various underground coal mining equipment
UYP-0.38/0.66 Mine mobile shielding rubber sheathed flexible cable Rated voltage 0.38/0.66KV power connection of various underground coal mining equipment
UYP-0.66/1.14 Mine mobile shielding rubber sheathed flexible cable Rated voltage 0.66/1.14KV Power connection of various underground coal mining equipment
UYP-3.6/6 Mine mobile shielding rubber sheathed flexible cable Rated voltage is 3.6/6KV mobile ground mining machinery power connection. Ambient temperature