铸铁拍门是我厂自行研制的专利产品，该产品以Q/TF-B2771本公司技术规范爲准；该产品按GB/T13927实验要求停止；设备公称压力（PN）：0.25-1.6Mpa；公称通径（DN）：200-2000mm。 二、用处 拍门 适用于给排水及污水处置工程的各种管道和水渠道作溢流、止回之用，亦可用作各种竖井井盖，它仅用于单向水流的圆形出水口。 三、类型 拍门 分爲配重式和浮箱式两种，其中配重式 拍门 又分前挂配重式和附件配重式。 拍门 的构造简图见图1、2、3。 四、构造特点： 拍门 具有流道正向单向开启和反向封闭的作用。配重式 拍门 借助于配重的均衡作用，在水流的作用下使门页自动开启或封闭，或稍加外力作用使门页开启或封闭；浮箱式 拍门 则应用门页在水中的浮力，在水流的作用下使门页开启或封闭。 1、配重式 拍门 的优、缺陷； （1） 构造复杂、任务牢靠； （2） 门页的开启需求借助配重的均衡； （3） 门页封闭时，冲击力较大，易损坏门座。 2、浮箱式拍门的优点、缺陷； （1） 门座构造与配重拍门相反，门页爲密封腔体构造，门页比重爲1.2-1.5； （2） 无需悬挂配置配重； （3） 门页封闭时冲击力小。 五、 拍门 的装置运用 1、 拍门 装置可与法兰衔接，可预埋，也可永插； 2、 配重 拍门 运用时，假如正向水力缺乏，不能开启门页，可依据装置地位需求设置不等分量的配重安装； 3、 浮箱 拍门 在运用进程中，可经过向门页密封腔体内注水或放水的办法改动门页的比重，以到达*开启效果。 4、 多台 拍门 装置时，如因起吊条件限制需分号装置，应留意标注标志，因每台拍门的门座和门页衔接属偶配，不能互换。 5、 穿墙管装置轴线与程度方向的夹角a应大于或等于零度（见图4） 6、 拍门 装置后，门座与门页间有3mm左右的间隙属正常景象，当门页接受一定的反向压力时，间隙会增加致使消逝。This product was developed and recovered by our factory. The product is based on the technical specifications of Q/TF-B2771 Company; the product is stopped according to GB/T13927 experimental requirements; nominal pressure of equipment (PN): 0.25-1.6 Mpa; nominal diameter (DN): 200-2000 mm. 2. The utility flapping door is suitable for all kinds of pipes and channels in water supply and drainage and sewage disposal projects for overflow and backflow, and also for various shaft covers. It is only used for circular outlets of unidirectional flow. 3. There are two types of batting doors: counterweight type and floating box type. Among them, counterweight batting doors can be divided into pre-hanging counterweight type and attachment counterweight type. The structural sketch of the clap door is shown in Figs. 1, 2 and 3. 4. Structural characteristics: The clapping door has the function of one-way opening and reverse closure of the flow channel. With the help of the balance function of the counterweight, the counterweight clapping door can automatically open or close the door pages under the action of water flow, or open or close the door pages with a little external force; the floating box clapping door uses the buoyancy of the door pages in water to open or close the door pages under the action of water flow. 1. The advantages and disadvantages of the counterweight clapping door; (1) the structure is complex and the task is reliable; (2) the opening demand of the door page is balanced by the counterweight; (3) when the door page is closed, the impact is greater and the door seat is easy to be damaged. 2. Advantages and disadvantages of floating box type clap door; (1) Portal seat construction is contrary to counterweight clap door, the door page is sealed cavity structure, the specific gravity of the door page is 1.2-1.5; (2) no suspension configuration counterweight; (3) the impact force is small when the door page is closed. Fifth, the device of clapping door can be connected with flange, buriable or permanently inserted; second, if the front hydraulic force is insufficient and the door page can not be opened, it can be installed with unequal weight according to the requirement of device status; third, the method of injecting or discharging water into the sealing chamber of the door page can be changed during the operation of the floating box clapping door. Move the proportion of the door pages to reach the * open effect. 4. When several door-slapping devices are required to be semicoloned due to the limitation of lifting conditions, attention should be paid to labeling signs, because the connection of the door seat and the door page of each door-slapping device belongs to the spouse and cannot be exchanged. 5. The angle a between the axis and the degree direction of the wall-piercing pipe device should be greater than or equal to zero (see Fig. 4) 6. After the door-patting device, the gap between the door seat and the door page is about 3 mm. When the door page receives a certain reverse pressure, the gap will increase and disappear.
