Special single riser drainage system is the beginning of the beginning of the special parts, special parts of the upper part of the special accessories and special accessories under the two. In order to solve the mutual interference between the branch pipe and the riser pipe, the upper part is used to drain the connection between the branch pipe and the drainage riser. The lower part is specially used for draining the connection between the vertical pipe and the drain dry pipe, and simultaneously solves the problem of the water jump, the backwater and the air passage resistance in the bottom of the vertical pipe.
The upper part of the special accessories of the two functions, the connection of the drainage branch pipe and drainage riser is the basic function, to solve the mutual interference of the two water flow is the main function. In order to prevent the interference of water flow, there are two ways to take measures:
1 shunt. With the inner baffle, the inner pipe or changing the direction of water flow into the direction and so on, so that the drainage branch pipe flow and drainage riser water flow in the same direction before the flow. Baffle Suwito, circulation device, ring rotary device of the inner tube and the inlet side flow direction change is based on this idea.
2 cyclone. The connection between the drainage transverse branch pipe and the pipe fittings is not a positive access, but is connected with a tangent direction. In order to form the vortex state of the water flow of the transverse branch pipe, the air core of the vertical tube center is maintained, and the vortex flow is also caused by the adoption of the guide vanes, the inner wall of the pipe or the inner wall of the pipe line (spiral rib or spiral body). The former, such as rotary inlet pipe fittings, the latter, such as AD type slender joints, AD type small joints, CA type connectors, CB type connectors, such as rotary tube. Another is the spiral rib is arranged in the cyclone tube, also have very good effect, such as swirling joint noise reduction.