Device for protecting cable of opening machine

The utility model provides a device for protecting the cable of an opening machine. The device comprises an outer casing, an inner casing, a heat insulating layer, positioning clamps and supports; the outer casing is sleeved on the inner casing; the heat insulating layer is arranged between the inner casing and the outer casing; the positioning clamps are arranged on two ends of the inner casing and the outer casing; and the supports are arranged below the outer casing. The device provided by the utility model can prevent the cable of an encoder from being baked and damaged under the high-temperature radiation of molten iron in front of a furnace, solve the problem that the cables and the high-temperature resisting and heat insulating casings are replaced frequently under the normal production condition and improve the operation stability and reliability of the opening machine.