CN201270160Y - Coal mining electric cable for controlling cable core extension - Google Patents

Abstract

The utility model discloses a coal mining machine cable with a stretchable control core for coal mining machines, which comprises power cores, a ground core and a control core, a sheath is sleeved outsides of the power cores, the ground core and the control core, the control core is wave-shaped, the control core is formed by simultaneously binding copper conductors and steel wires, and high-elasticity insulating rubber is extruded outside the copper conductors and the steel wires. The coal mining machine cable with the stretchable control core has fine elasticity stretching functions, and the stretching rate is not lower than 8%. When the coal mining machine cable is dragged and bent by the external force, the control core is simultaneously shaped and elongated, when the cable is restored, the wave-shaped control core can be restored under the action of the steel wires and the high-elasticity insulating rubber, thereby avoiding the control core of conductor being pulled finely and broken.

Description

The telescopic electric cable for coal mining machine of control core

Technical field

The utility model relates to a kind of cable of coal-winning machine.

Background technology

At the improvement of coal-winning machine shielded flexible cable, former improvement technology all is the tensile strength around the core that how to tighten control.And in fact, electric cable for coal mining machine is to drag bending under the effect of power, stretching and to rupture after making the drawing-down of control line core conductor.Experimental results show that, during 6 times of electric cable for coal mining machine bending radius, the tensile elongation of control core is about 5-6%, electric cable for coal mining machine control core major cause of failure be drag, effect crooked, force-extension can't be stretched down and cause conductor drawing-down fracture, cause coal-winning machine to cut off the power supply and quit work.

Summary of the invention

The purpose of this utility model is to provide a kind of control core telescopic electric cable for coal mining machine, and the control core of this cable is scalable when dragging bending, thereby avoids being ruptured by drawing-down.

The purpose of this utility model be achieved in that this cable comprise the power core, core and control core, sheath be enclosed within the power core, core and control core the outside, control core undulate, the control core is made of copper conductor and the common synnema of steel wire, and copper conductor and steel wire are extruded with the high resiliency insulation rubber outward.

Control core of the present utility model is made of copper conductor and the common synnema of steel wire, and control core undulate has the better elastic Telescopic, and expansion and contraction is not less than 8%.Drag when electric cable for coal mining machine is subjected to external force, when crooked, the anamorphic stretching simultaneously of control core; Cable drags, during crooked the answer, waveform control core homing under the rebound effect of steel wire and high resiliency insulation rubber, thus avoided the control core to be ruptured by drawing-down.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

1. power cores among the figure, 2. core, 3. control core, 4. insulation rubber, 5. insulation screen, 6. sheath, 7. bend tension state, 8. quiet state, R. bending radius, the Φ of control core of control core. diameter.

Embodiment

In Fig. 1 and Fig. 2, this cable comprise sheath 6, power core 1, core 2 and control core 3, sheath 6 be enclosed within power core 1, the outside of core 2 and control core 3, control core 3 is made of copper conductor and the common synnema of steel wire, controls core 3 undulates.The copper conductor and the steel wire of control core 3 extrude the high resiliency insulation rubber outward.

Claims (1)

1. control the telescopic electric cable for coal mining machine of core for one kind, this cable comprise the power core, core and control core, sheath be enclosed within the power core, core and control core the outside, it is characterized in that controlling the core undulate, the control core is made of copper conductor and the common synnema of steel wire, and copper conductor and steel wire are extruded with the high resiliency insulation rubber outward.

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