马家沟矿洗煤厂的原煤皮带运输机送来的原煤需由一块翻板合理地分给到老厂和新厂的两台跳汰机前的缓冲仓中。操作人员根据这两个缓冲仓中的水银接点煤位继电器所发出的“满仓”或“空仓”信号手动操作这块翻板。由于缓冲仓的容量很小,所以对翻板的操作就很频繁,加之,该处是洗煤厂的咽喉,于是也就要求翻板定位准确可靠。 Majiagou coal washing plant coal conveyor belts brought raw coal delivered by a flap properly distributed to the old factory and the new plant two jig buffer buffer before. The operator manually operates the flap according to the “full position” or “short position” signal issued by the mercury contact coal level relay in both buffer positions. As the buffer storage capacity is small, so the operation of the flap is very frequent, in addition, where the throat of the coal washing plant, so it requires the flap accurate and reliable positioning.