An unpowered interception well

Abstract

The invention discloses an unpowered catch basin. The unpowered catch basin comprises a basin body, wherein a rainwater and sewage confluence inlet pipe is arranged on a first side wall of the basin body, an outlet pipe communicated with a natural water body is arranged on a second side wall, and an split flow port connected with an split flow pipe is formed in the bottom of a third side wall. The unpowered catch basin is characterized in that a float ball cut-off device is arranged at the split flow port, a fixed weir is arranged in a downstream position of the split flow port in the basin body and close to an outlet pipe mouth, a float box type upstream control weir gate normally in a close state is arranged above the fixed weir, and the fixed weir extends upwards from the basin bottom to be in closed fit with the lower end of the float box type upstream control weir gate. According to the unpowered catch basin, control is performed through combination of the float ball cut-off device and the float box type upstream control weir gate, so that initial rain is intercepted to a sewage treatment plant, and late rainwater during heavy rainfall is drained to the natural water body in a large flow manner.

Description

technical field [0001] The invention relates to a drainage system, in particular to a non-powered interception well. Background technique [0002] After the initial rainwater washes the air and the ground surface, it carries a large amount of toxic and harmful substances. After investigation, it is shown that the toxic and harmful substances carried in the initial rainwater are more than domestic sewage. If the initial rainwater is directly discharged into rivers and lakes, it will seriously pollute the water environment, so the initial rainwater needs to be treated. At present, a simple interception well system is usually used to intercept the first rainwater into the sewage pipe and send it to the sewage treatment plant for purification treatment. However, the pollution degree of the rainwater in the later period of the rainfall is relatively light, and it can be directly discharged into the natural water body without entering the sewage pipe. Therefore, it is necessary ...

AI Technical Summary

Problems solved by technology

[0003] The Chinese utility model patent with the publication number CN 104863249 A discloses an initial rainwater interception well, which divides the pool body into a rainwater collection area and an overflow area through the overflow weir, but because the overflow weir has a certain height, too high will affect the flow rate When the rainwater flows into the overflow area in the late stage, if it is too low, it will not be able to intercept, and when the water level of the natural water body connected to the overflow area is higher than the water level in the interception well, it is impossible to prevent the water from the natural water body from entering the interception well

Images