煤矿井下可伸缩抗压风门的研制与应用

Development and application of retractable and pressure resistant dampers in coal mines underground

研制的煤矿可伸缩抗压风门包括风门门体、侧可伸缩盒、上可伸缩盒、固定盒、伸缩框、伸缩连接件等。可伸缩抗压风门并排设置2个风门门体,且在2个风门门体相远离的一侧均安装有侧可伸缩盒、风门门体上方安装有上可伸缩盒;每个伸缩盒内安装有补偿缸。当可伸缩抗压风门受到来自上方的压力时安装盒向下压,此时的第一弹簧被压缩,导向杆进入导向孔内部,同时压力杆向下向压动活塞,活塞压缩第二弹簧,此时油液被压入副缸内部;当压力消失时,第二弹簧恢复自然状态,进而将活塞和压力杆恢复到自然状态。当可伸缩抗压风门受到来自巷帮侧面的外界压力时,也能进行伸缩。可伸缩抗压风门装置的外部具有弹性,当巷道压力增加时,可避免风门设施被挤压变形造成漏风,甚至造成风门难以开关,从而保证矿井通风系统稳定可靠。

The developed coal mine retractable pressure resistant dampers includes the door body,side expandable box,upper expandable box,fixed box,expandable frame,expandable connector,etc.Two damper bodies are arranged side by side for the expandable pressure resistant damper,and a side expandable box is installed on the side where the two dampers bodies are far away,and an upper expandable box is installed above the damper body.Each expansion box is equipped with a compensation cylinder.When the retractable pressure resistant damper is subjected to pressure from above,the installation box is pressed downwards.At this time,the first spring is compressed,and the guide rod enters the guide hole.At the same time,the pressure rod presses the piston downwards,which compresses the second spring.At this time,the oil is pressed into the interior of the auxiliary cylinder.When the pressure disappears,the second spring returns to its natural state,thereby restoring the piston and pressure rod to their natural state.When the retractable compression damper is subjected to external pressure from the side of the alley,it can also be retracted.The external part of the retractable and pressure resistant air door device has elasticity.When the pressure in the tunnel increases,it can prevent the air door facilities from being squeezed and deformed,causing air leakage,and even making it difficult to open and close the air door,thereby ensuring the stability and reliability of the mine ventilation system.