34results about How to "Slow water flow" patented technology

This invention discloses a rat tunnel and culvert interface structure for low-permeability black soil farmland, belonging to the field of farmland drainage and soil moisture regulation technology. The aim is to solve the problems of easy collapse, blockage, and maintenance difficulties at the connection points of existing rat tunnels and culverts. The key to this technical solution is that it includes a rat tunnel guide section and a transition connection cavity connected to the rat tunnel guide section. The cross-sectional area of ​​the inlet end of the transition connection cavity is smaller than that of the outlet end. The transition connection cavity has an anti-collapse support frame inside, a sediment collection chamber at the bottom, and a filter layer on the outside. The rat tunnel guide section and the transition connection cavity are connected by a flexible pipe sleeve. It also includes a backwash pipe connected to the transition connection cavity and the culvert access section, and a drainage control section located downstream of the main culvert. This invention is mainly used in drainage systems for low-permeability black soil farmland, effectively preventing interface collapse and sediment blockage, simplifying maintenance operations, and enabling flexible control of drainage intensity.