MY low-voltage rubber sheathed flexible cable MY mining mobile cable

MY low-voltage rubber sheathed flexible cable MY mining mobile cable

Structural characteristics of mining rubber sheathed cables:

1： Conductive wire core. Flexibility requirements include electric drill cables and mining machine cables; The following measures are taken for the wire structure:

1，Using softer small-diameter copper single wires, bundled and twisted at small intervals. The bending and twisting properties of the entire cable are also affected by the insulation and sheath structure, so it cannot be assumed that the finer the single wire, the smaller the pitch, the better.

2，The use of co directional bundle twisting and compound twisting can improve flexibility.

3，In order to facilitate the relative sliding of wires in the insulation layer and facilitate installation and maintenance. The single wire of drill cables and small section mining machine cables should be tinned, and the large section mining machine cables should be insulated with paper tape outside the wire.

2： Insulation layer Require sufficient electrical insulation performance

1，Adopting a glue content of not less than one percent35The rubber

2，The insulation thickness is thicker than that of general rubber sheathed cables

3，Using rubber with good electrical properties and adopting good extrusion technology (such as extrusion vulcanization continuous production line)

3： Shielding layer

The use of non-conductive rubber as the shielding layer should ensure that its transition resistance meets the standard requirements to ensure reliable operation of the relay protection system in case of accidents.

4： Pad core

1，The cushion core should fully serve as a buffer when the cable is subjected to impact or compression, while not being too large in outer diameter. Require a reasonable design to fill the gaps between insulated core wires.

2，The mechanical performance should not be lower than the requirements of insulating rubber.

3，Cannot adhere to the insulated wire core.

5： Cable structure

1，To improve the flexibility of the cable, smaller pitch multiples should be used.

2，To ensure the mechanical strength of the ground wire core, the cross-section of the ground wire core is larger than that of general cables. For small cross-section products, the same cross-section as the main conduit is used.

3，The control core is first individually twisted into a group, and then combined with the main core to form a cable.

6： Protective layer

1，Require sufficient mechanical strength and good wear resistance. Underground cables require flame retardancy. Therefore, chloroprene rubber is used, and the rubber content is not less than 50%.

2，6KVMobile rubber sheathed cables require sufficient electrical insulation of the sheath to improve its resistance to corona cracking.

seven:The cable should have a dense and compact structure, and each component should have relative sliding properties.

MY low-voltage rubber sheathed flexible cable MY mining mobile cable