水工建筑物的平面闸门当用移动式启闭机(台车启闭机、半门式起重机、门式起重机)进行闸门启闭操作时,启闭机的复滑车(或者吊钩)通常是通过拉杆与闸门吊耳连接的。这种拉杆连接一般启闭力都比较大,小者几吨,大者高达几百吨。因此,启闭操作 Flat gate for hydraulic structures When the gate is opened and closed by a mobile hoist (pallet hoist, half-portal crane, gantry crane), the double pulley (or hook) of the hoist is usually Through the tie rod and gate lugs connected. This pull rod connection is generally larger than the opening and closing force, the smaller a few tons, the largest up to hundreds of tons. Therefore, the opening and closing operation