一、结构该检查装置的结构原理如图所示。压力油 P 进入活塞 H 的环形腔 K,再经阴尼小孔 h 后分成两路。一路到活塞 H 的下腔 E,另一路通过锥阀 a 上的小孔到弹簧腔,会同弹簧作用力一起作用在锥阀 a 的底面上,封住回油。在 E 腔建立了压力。这时因为没有油液流出,阻尼小孔 h 的前后压力相等。由于活塞 H 的下端受力面积比上端大,油液将活塞 H 推向上,顶住微动开关 M,这是原始状态。微动开关断开电源,无电讯 First, the structure The structure of the inspection device as shown. The pressure oil P enters the annular cavity K of the piston H and is divided into two paths by the small pits h. All the way to the lower chamber E of the piston H, the other way through the small hole on the cone valve a to the spring chamber, together with the spring force acting on the bottom of the cone valve a, sealed back to the oil. Pressure build up in E cavity. At this time because there is no oil flow, damping orifice h before and after the same pressure. Because the lower end of the piston H force area than the upper end, the oil will push the piston H upward, against the micro switch M, which is the original state. Micro switch off the power, no telecommunications