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目前我国单向水级差的内河船闸大多采用了人字闸门,以节省钢材、降低闸门及闸首的造价。启闭口门宽度不大的八字闸门常用推杆启闭机。在闸首机房中,设置启闭机的推杆座及轨道,在设计推杆座及轨道时必须首先确定推杆尾轮滚动的轨迹。常用的方法是采取大比例尺作图法求解这种轨迹,但往往因图幅的限制,比例尺不可能用得很大,而且作图法的准确度较难控制。实践证明,按作图法设计的轨道有时还会给工程带来后遗症。如江苏省江都县盐邵船闸人字闸门,由于设计轨道不准,出现了推杆尾轮跑出轨道的事故,而后不得不对推
At present, most of the river locks in China, which have a one-way water level difference, use the “Mudou” gate to save the steel and reduce the cost of gates and gates. Opening and closing the mouth width of the gate is not commonly used push rod hoist. In the gatehouse, set hoist push rod seat and track, in the design of the push rod seat and track must first determine the push rod tail wheel rolling track. Commonly used method is to take large-scale mapping method to solve this trajectory, but often due to the limitations of the map, the scale can not be used very large, and mapping accuracy is more difficult to control. Practice has proved that, according to the design of the track orbit sometimes give the project sequelae. Such as Jiangsu Jiangdu Salt Saltwater Miter gate, due to the design of the track is not allowed, appeared putter tail wheel ran out of track accident, and then had to push