当水电站机组发生过速或飞逸和压力管道出现紧急事故时,要求进口闸门在动水下能快速关闭,以便保护机组和厂房的安全。过去用于操作闸门快速关闭的启闭机有油压起闭机和卷扬式起闭机两种。前者广泛用于大型水电站,操作可靠,但造价较高,后者用于湖南柘溪等水电站,从运行情况看,总的还是能满足要求的,但因为定型设计没有解决,未推广使用,所以一些设计单位和用户乃采用经过改造的QPQ型卷扬机来代替。QPQ型卷扬式启闭机,具有质量好、重量轻、体积小、价格便宜等优点,已列为定型设计的产品,除一机部所属几个大型机器厂专门生产外,各省也有一些 When the hydropower plant over speed or runoff and pressure pipelines emergencies, require the import gate in the water can be quickly shut down in order to protect the safety of generating units and plants. In the past for the closure of the gate quickly closing hoist hydraulic closing machine and winch from the closure of two. The former is widely used in large hydropower stations, reliable operation, but the cost is higher, the latter for the Hunan Su River hydropower station, from the operation of the situation, the overall can meet the requirements, but because the design did not solve the stereotypes, not to promote the use of Some design units and users are using the modified QPQ winch instead. QPQ type winch hoist, with good quality, light weight, small size, low price, etc., has been classified as stereotypes of design products, except for a machine belonging to several large-scale specialized machinery factory production, the provinces also have some