启闭机一般选用固定式启闭机和一门一机的布置，但若闸门操作运行方式和启闭时间允许时，也可选用移动式启闭机。
 (2)多孔泄水系统的事故、检修闸门的启闭机，一般选用移动式启闭机。
 (3)施工导流封孔闸门的启闭机，其启闭力应考虑在一定水位下有启门的可能，同时应有准确的指示装置以显示闸门是否到达底坎。

闸门启闭机，又称为启闭机闸门，是一种大型水利机械产品闸门启闭机关系到水工建筑物的正常运行，除应满足一般起重机械的设计要求外，工作安全可靠和操作灵活方便具有特殊的意义。

螺杆式启闭机可以分为：手电两用螺杆式启闭机手推式螺杆式启闭机、侧摇式启闭机、手动螺杆启闭机等几种用螺纹杆直接或通过导向滑块、连杆与闸门门叶相连接，螺杆上下移动以启闭闸门的机械。螺杆支承在承重螺母内,螺母和传动机构（伞齿轮传动或蜗轮传动）固定在支承架上。接通电源或用人力手摇柄拖动传动机构，带动承重螺母旋转,使螺杆升降以启闭闸门。螺杆是受压受拉杆件,需要下压力迫使闸门下降时应计算压杆的稳定性。螺杆式启闭机结构简单，坚固耐用，造价低廉，适用于小型平面闸门和弧形闸门，其启闭力一般在200kN以下。500kN、750kN大容量的螺杆启闭机也已生产,用于潜水孔平面闸门和弧形闸门的操作。

对于固定式的启闭机来说，其安装主要是以闸门起吊中心为基准，纵向以及横向的偏差距离应该不能小于3毫米，水平的偏差应该小于千分之0.5左右，而高程的偏差可以达到5毫米。螺杆式的启闭机在进行螺杆与闸门进行连接的过程中，其垂直偏差处理不会大于千分之0.5；我们还要在启闭机进行安装时进行全面的检查与检验工作。要对开式的齿轮以及轴衬进行全面的转动，并在转动的地方进行油污和铁屑的清洁处理工作，主要是对灰尘的清除，再加上新的油，并按照减速箱的说明进行安装，还要按照产品的说明书进行加油以及规定油位的处理。我们在启闭机在进行定位时，机架底的脚部螺栓处理要进行混凝土的浇灌处理，其机座与混凝土必须要用水泥砂浆进行填埋。我们的门机安装的过程中，全进行全面的清点与排查，还要对机器的构件进行安装，在安装的过程中，偏差必须要符合图纸的相关规定，如果没有准确的规定，可以参考相应的要求进行执行；对于门机的轨道安装时，其门的组装如果有偏差的话，应该是以图纸和厂家的说明书中规定的内容来进行安装。

  Gate hoist, also known as hoist gate, is a large-scale hydraulic machinery products gate hoist to the normal operation of hydraulic structures, in addition to meeting the design requirements of general lifting machinery, safe, reliable and flexible operation has special significance. Screw hoist can be divided into: flashlight dual-purpose screw hoist hand-pushed screw hoist, side swing hoist, manual screw hoist and other threaded rods directly or through the guide slider, connecting rod and gate blade connected, screw up and down to open and close the gate machinery. The screw is supported in the load-bearing nut, and the nut and the driving mechanism (bevel gear or worm gear drive) are fixed on the support frame. Turn on the power supply or drag the transmission mechanism with the manual handle to drive the load-bearing nut to rotate, so that the screw lifts to open and close the gate. The screw is subjected to compression and tension. It is necessary to calculate the stability of the pressure bar when the pressure is forced to fall down. Screw hoist is simple in structure, strong and durable, low in cost, suitable for small plane gate and arc gate, its opening and closing force is generally below 200 kN. 500 kN, 750 kN large capacity screw hoist has also been produced for diving hole plane gate and arc gate operation. For the fixed hoist, its installation is mainly based on the lifting center of the gate, the longitudinal and transverse deviation distance should not be less than 3 mm, the horizontal deviation should be less than 0.5 parts per thousand, and the height deviation can reach 5 mm. In the process of connecting screw and gate, the vertical deviation of screw hoist will not be greater than 0.5 parts per thousand; we also need to conduct a comprehensive inspection and inspection when the hoist is installed.  To open gear and shaft lining for a comprehensive rotation, and in the rotation of the place for oil and iron cleaning work, mainly to remove dust, plus new oil, and according to the reducer instructions for installation, but also in accordance with the product instructions for refueling and the required level of oil treatment. When we locate the hoist, the foot bolt treatment at the bottom of the frame should be poured into concrete, and the machine base and concrete must be filled with cement mortar. Our gantry crane installation process, a comprehensive inventory and check, but also the components of the machine for installation, in the installation process, deviation must comply with the relevant provisions of the drawings, if there is no accurate provisions, you can refer to the corresponding requirements for execution; for gantry crane track installation, the door group If there is any deviation, the installation should be carried out according to the contents stipulated in the drawings and manufacturer's instructions.