1 results about "Circumflex" patented technology

The invention provides a rainwater flow guiding pipe with silencing pipe walls and gradually-changed staggered layers on the inner wall. The portion between the two layers of pipe walls is divided into a plurality of closed small spaces which can primarily obstruct noise generated when the pipe walls are washed by rainwater. Beside, the small spaces are filled with energy absorbing balls. When sound is transmitted into the small spaces, sound wave vibration energy is absorbed, and noise is further eliminated. Canine-tooth-type staggered protrusions are arranged on the inner side of the inner pipe wall in the radial direction. After rainwater is washed down, the rainwater flows along a circumflex-shaped path formed by the staggered protrusions, rainwater washing speed is decreased, sound generated when the rainwater impacts the pipe walls is reduced, and the effect of eliminating noise is achieved. The height of the protrusions becomes smaller while the rainwater flow speed is decreased, and the situation that the rainwater overflows from the upper end of the flow guiding pipe when the water flow is too large is also prevented at the same time on the premise that it is guaranteed that noise is lowered. The outer surfaces of the protrusions are wrapped in PVC membranes, during rainwater washing, water flow can be buffered, and the effect of eliminating noise is further achieved.