Coal gas high-temperature preventing pneumatic semi-ball valve leakage combined device of submerged arc furnace discharging system

The utility model discloses a combined device for preventing leakage of a coal gas high-temperature pneumatic hemisphere valve of a submerged arc furnace blanking system, and relates to the technicalfield of submerged arc furnace production corollary equipment. The device comprises a stock bin, a high-temperature discharging pneumatic hemisphere valve, a gas leakage prevention sealing device, a flue gas leakage prevention sealing device, a communicating pipe, a discharging pipe and a discharging pipe support, and the stock bin is communicated with the gas leakage prevention sealing device through the high-temperature discharging pneumatic hemisphere valve. According to the improved submerged arc furnace discharging system, through the arrangement of the gas leakage prevention sealing device, toxic flue gas generated by smelting in the furnace does not leak any more, the whole discharging system control area is reliably and safely produced, the breathing health of equipment inspectionpersonnel is guaranteed, t