Prefabricated assembly type grating energy dissipation inspection well and sewage system suitable for being laid in riverway

Abstract

The invention discloses a prefabricated assembly type grating energy dissipation inspection well. The prefabricated assembly type grating energy dissipation inspection well comprises an inspection well body, an upper-layer well chamber located on the upper part and a lower-layer well chamber located on the lower part are arranged in the inspection well body, and at least one layer of energy dissipation grating is arranged between the upper-layer well chamber and the lower-layer well chamber; and a water inlet pipe connector and a vent pipe connector are arranged in the upper-layer well chamber, and an upstream connector and a downstream connector which are used for installing a sewage main pipe are arranged in the lower-layer well chamber. The invention further discloses a sewage system suitable for being laid in the riverway; the the sewage system comprises the sewage main pipe buried in the riverway, the prefabricated assembly type grating energy dissipation inspection wells are arranged on the sewage main pipe at intervals, the inspection well body is closed, and a drainage vertical pipe is connected with the water inlet pipe connector; and a vent pipe is connected with the ventpipe connector, the upstream connector and the downstream connector are connected with the sewage main pipe, and the sewage main pipe and the prefabricated assembly type grating energy dissipation inspection well are both located below the flood level of the riverway.

Description

technical field [0001] The invention belongs to the technical field of municipal engineering, in particular to a prefabricated and assembled grid energy dissipation inspection well and a sewage system suitable for laying in river courses. Background technique [0002] Main sewage pipes do not have the implementation conditions for bank embedding and must be installed in river courses in many cases. The existing sewage systems suitable for laying in river courses mainly have the following problems: [0003] 1. Does not consider the sealing requirements of inspection wells (such as Figure 8 As shown), when the river water rises, it flows backward into the main sewage pipe, causing mixed river water in the sewage pipe, resulting in a decrease in the concentration of sewage in the main sewage pipe, which does not meet the "Three-Year Action Plan for Quality and Efficiency Improvement of Urban Sewage Treatment (2019-2021)" 》Requirements on the concentration of biochemical oxyge...

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Problems solved by technology

[0003] 1. Does not consider the sealing requirements of inspection wells (such as Figure 8 As shown), when the river water rises, it flows backward into the main sewage pipe, causing mixed river water in the sewage pipe, resulting in a decrease in the concentration of sewage in the main sewage pipe, which does not meet the "Three-Year Action Plan for Quality and Efficiency Improvement of Urban Sewage Treatment (2019-2021)" 》Requirements on the concentration of biochemical oxygen demand (BOD) in the influent of urban sewage treatment plants not less than 100mg / L;

[0004] 2. The flood discharge function of the river is not considered (such as Figure 9 As shown), the inspection well is higher than the flood level of the river, and when the water level of the river rises during the flood, the inspection well hinders the flood discharge of the river;

[0005] 3. The ventilation pipe of the main sewage pipe inspection well is not higher than the flood level (such as Figure 10 As shown), the river water backflows into the main sewage pipe at the flood level, causing mixed river water in the sewage pipe, and the sewage concentration in the main sewage pipe decreases, which does not meet the "Three-year Action Plan for Quality and Efficiency Improvement of Urban Sewage Treatment (2019-2021)" 》About the requirement that the influent biochemical oxygen demand (BOD) concentration of urban sewage treatment plants should not be lower than 100mg / L

Considering the safety of personnel entering and repairing, traditional drop wells generally use two well chambers—the entry well chamber and the water inlet well chamber, which have the disadvantages of being large and hindering the flood discharge of the river; the drop wells use concrete cast-in-place technology, which has the disadvantage of requiring on-site pouring , such as a kind of energy-dissipating sewage intercepting type drop well device disclosed in Chinese patent application with publication number CN109339200A

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