浮箱拍门属水利水电工程中的水工机械设备，用于河道、灌排站以及各种排水工程，与管道成套配合使用。现行业内应用最为广泛的拍门按原理分有：平板式拍门、浮箱拍式门、侧翻式拍门等，其他种类的拍门，也都是基于上述几种拍门原理产生的变种。浮箱拍门一般安装在管路终端出水侧，如江河边、出水池等，其主要是起单向阀的作用，目的是实现密闭抽真空和防止水倒灌等功能。但现有技术中存在的问题是拍门的门盖结构尺寸较小，在某些场合(如带有出水水箱的水利泵站)起不到单向阀的作用。
Buoyancy flapping door belongs to hydraulic machinery equipment in water conservancy and Hydropower projects. It is used in rivers, irrigation and drainage stations and various drainage projects, and is used in conjunction with a complete set of pipelines. At present, the most widely used clapping doors in the industry are: flat-panel clapping doors, floating-box clapping doors, side-flipping clapping doors and so on. Other types of clapping doors are also based on the above-mentioned clapping principles. Floating box flapping doors are usually installed on the outlet side of pipeline terminals, such as rivers, outlet pools, etc. They mainly play the role of one-way valves, in order to achieve the functions of closed vacuum pumping and water backfilling prevention. But the problem in the existing technology is that the door cover of the clapping door is small in size, and it can not act as a one-way valve in some occasions, such as water pumping station with water outlet tank.
而现有安装拍门的管道系统中，通常情况下，需要将出气口设置在穿墙管上，并与土建工程配合，在混凝土浇注前安装完毕；部分场合需要在管路中加入出气口，以利于水泵在抽水的过程中，减小管道内的空气阻力从而降低水头损失、保护水泵和水泵电机。
In the existing pipeline system with flapping doors, it is usually necessary to install the air outlet on the wall-piercing pipe, cooperate with civil engineering, and install it before concrete pouring. In some cases, the air outlet should be added to the pipeline to facilitate the pumping process and reduce the air resistance in the pipeline so as to reduce water. Head loss, protection of pump and pump motor.