拍门是安装在江河边排水管出口的一种单向阀，当江河潮位高于出水管口，且压力大于管内压力时，拍门面板自动关闭，以防江河潮水倒灌进排水管道内。目前拍门分为悬挂式，单开门，节能式双开门/双开门,节能型等型号。
The door is installed a one-way valve outlet pipe in the river drainage, when the river tide is higher than the water outlet pipe, and the pressure is greater than the pressure in the pipe when the door panel is automatically closed, to prevent the intrusion into the river drainage pipelines. At present, the door is divided into suspension type, single door, energy-saving double door / double door, energy-saving models.
拍门按照材质可分为：
The door can be divided into material according to the material:
1.铸铁拍门，又叫做生铁拍门
1. cast iron door, also known as cast iron beat the door
2.钢拍门，
2. steel door,
3.玻璃钢拍门，
3. glass fiber reinforced plastic door,
4.复合材料拍门
4. composite material beating door
拍门按照功能可分为：
The door can be divided into functions according to the function:
1.   上开式拍门
1. upper opening beat door
2.   对开式拍门
2. to one shot door
3.   配重式拍门
3. counterweight type flap door
4.   浮箱式拍门
4. floating box door
5.   液压拍门
5. hydraulic door
6.   侧开式拍门
6. side open flap door
拍门的安装使用
The installation and use of the door
1、拍门 安装可与法兰连接，可预埋，也可永插；
1, the door can be installed with the flange connection, can be buried, but also permanently inserted;
2、配重 拍门 使用时，如果正向水力不足，不能开启门页，可根据安装位置需要设置不等重量的配重装置；
2, the counterweight beat the door, if the forward hydraulic insufficiency, can not open the door page, according to the installation position, need to set different weight balance device;
3、浮箱 拍门 在使用过程中，可通过向门页密封腔体内注水或放水的方法改变门页的比重，以达到最佳开启效果。
3, in the process of using the floating box door, it can change the proportion of the door page by means of water injection or water drainage to the sealing cavity of the door page, so as to achieve the best opening effect.
4、多台 拍门 安装时，如因起吊条件限制需分号安装，应注意标注标记，因每台拍门的门座和门页连接属偶配，不能互换。
4, the installation of more than a dozen doors, such as lifting conditions should be installed semi colon, should pay attention to mark the mark, because each beat the door door and door page connection is a pair, can not be interchanged.
5、穿墙管安装轴线与水平方向的夹角a应大于或等于零度
5 、 the angle between the installation axis and the horizontal direction of the through wall tube A shall be greater than or equal to zero
6、拍门 安装后，门座与门页间有3mm左右的间隙属正常现象，当门页承受一定的反向压力时，间隙会减少以致消失。
6, the door is installed, and the clearance between the portal page about 3mm is a normal phenomenon, a door leaf under reverse pressure when certain gap will decrease and disappear.
铸铁拍门常见故障与排除方法
Common failures and removal methods of cast iron beating doors
（常见故障  原因分析  排除方法）
(common trouble, cause analysis, elimination method)
故障一、拍门门页在系统工作时开启角度不大：
The door angle of the door is not open when the system is working:
可能原因
Possible causes
1、拍门闩是否磨损、锈蚀 --------解决方案：更换拍门闩
1, take the latch whether abrasion and rust - solution: replace the shot bolt
2、浮箱式拍门门页是否蓄水过多，比重过大  -----------解决方案：放水减重
2, floating flap door page is too much water, the large proportion of water - solution: weight loss
3、配重式拍门是否配重过小  --------------解决方案：增加配重
3, weight type door is too small - weight solution: increasing weight
4、浮箱式拍门门页空箱是否渗漏 ------------解决方案：门页式压布焊
4, floating flap door leaks - Page empty solution: door leaf type pressure welding cloth
5、拍门门页和门座铰链是否受伤变形-----------解决方案：更换拍门
5, door door leaf and the door hinge is injured - deformation solution: replace the door
故障二、拍门在关闭后漏水：
Malfunction two. The door is leaking after closing:
可能原因
Possible causes
1、  密封橡胶三角带是否有损伤--------解决方案：更换橡胶带
1, sealing rubber belt is not damaged. Solution: replacement of rubber belt
2、门座上法兰是否变形--------解决方案：更换门座
2, valve seat flange deformation. Solution: replace the valve seat
3、门页密封端面是否变形--------解决方案：更换门页
3, the door leaf seal face deformation. Solution: change the door page
4、门座筒身是否锈蚀穿透--------解决方案：更换门座
4, a tube body corrosion penetration - whether solution: replace the valve seat
5、门页是否锈蚀穿透--------解决方案：更换门页
5, the door leaf rust - whether through solution: replacement of the door leaf
故障三、门页开启后不能回
Fault three, the door page can not be opened after
可能原因：
Possible causes:
1、             开启角度过大，限位块脱落--------解决方案：焊上限位块
1, the opening angle is too large, limiting block off - solution: welding upper limit block
2、拍门闩是否锈蚀--------解决方案：更换拍门闩
2, take the latch - whether corrosion solution: replace the shot bolt
3、门页、门座铰链是否变形--------解决方案：更换拍门
3, the door leaf, door hinge deformation solution: replace the door.
4、配重式拍门配重过大--------解决方案：减重卸荷
4, weight type door weight is too large, the solution: lose weight unloading