Water conservancy project water inlet hydraulic floating object collecting and cleaning mesh grid system

Abstract

The invention provides a water conservancy project water inlet hydraulic floating object collecting and cleaning mesh grid system. The water conservancy project water inlet hydraulic floating object collecting and cleaning mesh grid system comprises gate piers located on the two sides of a water inlet, three gate grooves, namely a first gate groove, a second gate groove and a third gate groove, are sequentially formed in the side wall of each gate pier from front to back, and a partition plate is arranged between the gate piers on the two sides. The partition plate divides the water inlet into an upper-layer water inlet and a lower-layer water inlet. The upper-layer water inlet is staggered downstream, the second gate groove and the third gate groove of the upper-layer water inlet are correspondingly provided with a front float collecting mesh and a rear float collecting mesh, the lower-layer water inlet is staggered upstream, a float collecting net cage or mesh is arranged on the lower part of the first gate groove of the lower-layer water inlet, and dam crest portal cranes are installed on the gate piers. According to the characteristics of the floating objects, the gathering sinking characteristics and the engineering operation cleaning requirements, the hydraulic action is fully exerted, the floating objects and the submerged objects are collected and cleaned through water flow in a layered mode in the process, the engineering operation safety is improved, and facility operation and maintenance are easy and convenient.

Description

technical field [0001] The invention relates to the treatment of floating objects at water inlets of water conservancy projects, in particular to a grid system for hydraulically collecting and clearing floating objects at water inlets of water conservancy projects. Background technique [0002] Surface garbage, plant roots, branches and leaves, floating plants, floating algae, floating ice, animal carcasses, buoys, etc. are washed into the river by rain and floods, and often form a large number of floating objects on the water surface. The floating objects have complex composition, flow, and dispersion. , Gathering, winding, sinking and other multiple characteristics. A large number of floating objects gather on the water surface in front of the water inlet under the interception of power stations, pump stations, water plants and other projects, affecting the benefits of power generation, drainage, water intake, water transfer, and sand discharge of the project, and threaten...

AI Technical Summary

Problems solved by technology

[0003] At present, power stations, pumping stations, and water plants are equipped with trash racks and cleaning machines at the water inlets to clean up pollution. Due to the constraints of meteorology, hydrology, technology, environment, management and other conditions, it is difficult to clean up floating objects in actual operation of the project, and the cleaning progress is often Unable to keep up with the accumulation speed of floating debris, if the cleaning is not timely, it will easily cause a large amount of floating debris to accumulate and block the trash rack, resulting in the continuous increase of the accumulation area and thickness, the gradual decrease of the flow section of the water inlet, and the enhancement of the attraction ability of the bottom flow to the floating debris on the surface , resulting in accelerated sinking of floating objects; in addition, it is difficult for the cleaning machine in front of the trash rack to pick up floating objects, and the work efficiency is low. Disturbance and extrusion of floating objects during the cleaning process will increase the amount of sinking

The flood season is the key period for the project to exert its benefits. At this time, the full-load operation of the project needs to take into account the cleaning and drifting. When the floating debris breaks out, the intensity of emergency cleaning before the grid is high, and the operation is difficult. Some power station trash racks cause a large amount of water head loss due to the blockage of the throat. In some projects, the trash racks were even crushed by floating objects, the units were blocked, and they were forced to shut down for several months of maintenance, which affected the safe operation of the project.

The flood discharge channel of the drainage pumping station is single, and the blockage of the trash rack endangers the flood control and drainage of the jurisdiction, seriously affecting the safety of the urban jurisdiction during the flood season

[0004] The complex characteristics of floating objects determine that the comprehensive drift control of the project is a systematic work. The existing control methods and measures lack comprehensive research, insufficient adaptation to the law of floating objects, and failure to give full play to the hydraulic effect, which is difficult to meet the various requirements of water conservancy projects.

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