Anti-shock Anti-shock Coal door door door impact Bomi, impact Bomi closed factories, underground Bomi impact behind closed doors, door impact Bomi price, GB impact Bomi closed slightly entire network are e-commerce platform, you again vast the platform to find us Shandong St. impact Bomi closed coal has been very easy, but please stop look at Shandong's coal impact Bomi closed, anti-shock door, I can not give you that is the best, But you must be the most satisfied, the price is most favorable, is the most beautiful appearance, let you go on a mine when delivery is the best delivery of anti-shock Bomi closed doors into shock and anti-shock valve, anti- Shockwave closed doors and with the use of anti-shock valve. Fire door is mainly used for underground anti-shock material library and material payment Chamber to act as isolators to prevent shock and produced toxic gas diffusion to the outside roadway discharged from the total return air duct. Bomi impact behind closed doors by a frames, doors, dumplings page, atresia devices and other components. 1, door to unequal angle welding of the frame member. 2, arcuate leaf shell plate, Tic-Tac-ribs, channel steel ring beam welding together. 3, the next page dumplings one-way thrust ball bearings. 4, the locking device to lock shaft rotary handle. 5, sealing method using "9" shaped cross section rubber seal. Compared to the impact of anti-shock valve Bomi closed doors top with three ventilation valve means that there are three groups of the shutter plate to open a total of 18 122mm diameter ventilation holes, and live outside the door with automatic opening valve 12-degree angle hanging board. Each group of ventilation valve 20003 / h, total ventilation capacity of 60003 / h, according to wind speed 8m / s were designed, when used according to the need of underground blasting material library and total return air duct negative value, determine the ventilation valve group the number of each group can adjust the shutter hanging plate Qi-angle fine-tuned to meet the optimum ventilation. When the library once the explosion occurred after the shock wave attenuation and pressure as long as more than 20KPa, hanging plate pressed the shutter automatically closed within 3 ~ 8s, and the outside world to prevent the explosion shock flames, poisonous gas explosion spread to the outside Roadway diffusion discharged from the total return air duct. Shandong's coal mines Machinery Co., Ltd. is a coal mine mine gate designated manufacturers, there is the China Coal Industry Association awarded the designated manufacturer *, there are inspection reports issued by relevant departments, at the time of shipment, we will examine the report and certificate with the goods issue.