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我矿副井井口自1977年使用自动控制人字形安全门以来,未发生过任何事故,而且节约了劳动力,提高了劳动生产率。安全门如图1所示,系用钢管焊成人字形结构,能承受很大的冲击力,安全可靠。两扇门的接触处装设橡胶块,起缓冲作用。矿车进罐侧的安全门设由转盘、连杆、气缸和各种阀门组成的开闭机构(图2),安装在安全门的上方,以便于检查和维修。
Since the use of the automatic control herringbone safety gate in mine auxiliary shaft mine in 1977, no accidents have occurred and the labor force has been saved and the labor productivity has been raised. Security door shown in Figure 1, Department of welded steel pipe with a humanoid structure, can withstand a great impact, safe and reliable. The contact between the two doors is equipped with rubber blocks that serve as a buffer. The safety door on the tank car side of the tank is provided with an opening and closing mechanism consisting of a turntable, a connecting rod, a cylinder and various valves (FIG. 2) installed above the safety door for inspection and maintenance.