The cast iron gate is mainly composed of two major parts, the gate frame and the gate.
The gate frame of cast iron gate Valve is the supporting member of the Gate board, in the running slide of the gate, the anchor Bolt is installed in the two-stage concrete of the sluice pier and the sluice bottom plate, and the whole water pressure of the sluice board is safely transferred to the gate chamber. In order to save material and weight scientifically, the section of cast iron gate valve is made of lattice type, the size of the section is loaded and the operation of the gate is considered synthetically.
The gate is to be used to close and open the orifice of the movable water block, the surface of the plate with cast iron frame beam, in order to improve the strength of the gate, the plate made of arched, arch of the angle 60 degrees to reduce the water pressure.
Notice of installation of cast iron Gate 1, before the gate installation, first check the connection parts of the bolts due to the transport caused by the loose, if loose should be fastened.
2, check the main frame and horizontal frame links on the surface of the check whether there is dislocation, if there is dislocation is loose connection bolts will stop the water adjustment in the same plane.
3, the gate should be installed in the overall position to install, prohibit the gate frame, brake plate split installation, prevent the brake box deformation.
4, two stage before the overall hoisting of the gate in place to find good before and after the correct position, and then adjust the bolts and engineering with reinforced steel welded firmly. 5, the Gate factory, in order to make the gate, the brake frame fit tighter, after installation to reduce clearance, 2 meters above the gate in the upper and lower horizontal box installed on the plate card iron, vertical frame of the oblique iron increased the top wire.
Note that after the clearance adjustment, the Katie and the top wire on the inclined iron are removed to make the gate open and close.
6, in the pouring of concrete, flow into the gate, gate frame, oblique iron, baffle clearance of the mortar should be removed to prevent the impact of mortar solidification gate Working principle: The gate seal surface and the valve seat sealing surface is highly smooth, smooth, consistent, processing into a very fitting, strict sealing deputy. Gate through the stem of the lift, lower pressure on the media to form a conduction and turn-off.
It plays off in the pipeline.
Advantages: The fluid resistance is small, the sealing surface is not subjected to erosion when fully open, and can be used in the case of two-way flow of media, without directionality, durable and sturdy, not only suitable for minor valves, but also big valves. Disadvantages: High height, long opening and closing time, bulky, difficult to repair, if it is a large diameter gate valve, manual operation is more laborious.