这类启闭 机可沿直线轨道行驶，也可沿曲线轨道行驶。 启闭机(hoisting maehine)用以操作闸门 及拦污橱的机械设备。对启闭机的基本要求有:①运行 安全可靠;②操作维护方便;③结构简单，体积小，重 t轻，外形美观;④造价及维护费用低。 启闭机按是否设里行走机构分为固定式和移动 式，按驭动方式分为人力驱动、电动机驱动和内嫩机驱 动;按传动方式分为机械传动和液压传动;按与闸门连 接构件分为柔性构件(如钢丝绳、链条)连接和刚性构 件(如螺杆、齿条、活塞杆)连接两类。螺杆式、卷扬 式和液压式启闭机属固定式启闭机。移动式启闭机是 一种沿轨道行驶，能逐个操作多个闸门及拦污栅并兼 作安装和检修启闭设备的机械. 螺杆式启闭机利用传力螺旋，借承重螺母的旋 转，使螺杆带着门叶升降，以达到启闭闸门的目的。单 螺杆容t一般达320 kN，大型可达750 kN;行程在5 m以内，个别可达7~sm。螺杆在下降过程中，能对 闸门施加一定的下压力。此类启闭机结构简单，操作方 便，造价低廉，其动力可为手动或电动，广泛应用于小 型水利水电工程上。 卷扬式启闭机系用钢丝绳作为承重构件，通过 滑轮组和传动装置提升闸门;关闭闸门时则需依靠闸 门重量(包括加重及水柱重等)。它具有构造简单，制 造、维护方便，广泛应用于各种水利水电工程上。 这类启闭机有多种结构布置形式。
There are many kinds of structure layout of hoisting hoist. This kind of hoist can travel along straight track or curve track. Hosting maehine is a mechanical device used to operate gates and contamination cabinets. The basic requirements for hoist are: 1) safe and reliable operation; 2) convenient operation and maintenance; 3) simple structure, small size, light weight, beautiful appearance; 4) low cost and maintenance costs. The hoist is divided into fixed type and mobile type according to whether it is equipped with inside walking mechanism or not, and is divided into manpower drive, motor drive and inner tender machine drive according to control mode; mechanical drive and hydraulic drive according to transmission mode; flexible component (such as wire rope and chain) connection and rigid component (such as screw, rack and piston rod) connection according to connecting component with gate. Screw, hoist and hydraulic hoist belong to fixed hoist. Movable hoist is a kind of machine that can operate multiple gates and trash racks one by one and install and repair hoisting equipment. Screw hoist uses force transfer screw to make the screw lift with the door blade by rotating the load-bearing nut, so as to achieve the purpose of hoisting and closing the gate. The capacity of single screw is generally 320 kN, and the large screw can reach 750 kN. The stroke is less than 5 m, and individual screw can reach 7 ~ sm. The screw can exert a certain downward pressure on the gate during the descending process. This kind of hoist has simple structure, convenient operation and low cost. Its power can be manually or electrically operated, and is widely used in small-scale water conservancy and Hydropower projects. The hoisting hoist uses steel wire rope as supporting component, lifts the gate through pulley group and transmission device, and relies on the gate weight (including weight and water column weight) when closing the gate. It has the advantages of simple structure, convenient manufacture and maintenance, and is widely used in various water conservancy and Hydropower projects. This kind of hoist has many structural arrangements.