摘要
Abstract
The developed coal mine retractable pressure resistant dampers includes the door body,side expandable box,upper expand-able box,fixed box,expandable frame,expandable connector,etc.Two damper bodies are arranged side by side for the expandable pres-sure resistant damper,and a side expandable box is installed on the side where the two dampers bodies are far away,and an upper ex-pandable 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 compres-ses the second spring.At this time,the oil is pressed into the interior of the auxiliary cylinder.When the pressure disappears,the sec-ond spring returns to its natural state,thereby restoring the piston and pressure rod to their natural state.When the retractable compres-sion 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 be-ing 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.关键词
煤矿井下/可伸缩/抗压/风门Key words
coal mine underground/retractable/pressure resistant/damper分类
矿业与冶金
