Height-adjustable flat plate gate type weir

Abstract

The invention discloses a height-adjustable flat plate gate type weir and belongs to the irrigation technical field. The flat plate gate type weir comprises a waterproof control box, a gate plate, gate plate chutes, a door type gate frame, a buried type gate plate box and two adjusting screws; the buried type gate plate box is installed at a soil layer below the bottom of a canal; the lower part of the door type gate frame is fixed in the buried type gate plate box; the gate plate chutes are fixed at the left side wall and right side wall of the door type gate frame which are opposite to each other; the left side and the right side of the gate plate are inserted into the gate plate chutes respectively in a matched manner; the waterproof control box is arranged at the top of the door type gate frame; one end of each adjusting screw is connected with the waterproof control box, and the other end of each adjusting screw is connected with the gate plate; and the waterproof control box drives the adjusting screws so as to drive the gate plate to move up and down in the gate plate chutes. When the gate plate is raised to a highest point, the bottom of the gate plate is flush with the bottom of the canal; and when the gate plate is descended to a lowest point, the top of the gate plate is flush with the bottom of the canal. With the height-adjustable flat plate gate type weir of the invention adopted, the height of the weir can be adjusted, and the problem of sediment accumulation of a traditional weir or gate can be solved.

Description

technical field [0001] The invention relates to the technical field of irrigation, in particular to a plate gate type weir with adjustable weir height. Background technique [0002] In the process of canal irrigation, gates are usually used to discharge water in the form of weir flow or hole flow. When releasing water, for irrigation water diversions, it is not only expected that the water level of the upstream water from the main and branch canals should be kept as stable as possible. It is also desirable that the flow of downstream distribution water to the branch channel be as constant as possible. Based on the flow formulas of weir flow and pore flow, it can be known that when the flow rate of upstream water increases by 1 times, the water level in front of the weir only increases by 0.6 times, while the water level in front of the sluice needs to increase by 3 times. It can be seen that the weir flow has a good function of stabilizing the water level, while the hole fl...

AI Technical Summary

Problems solved by technology

[0003] However, traditional weirs are mostly discharge structures fixed in canals or rivers, and the height of the weir crest is generally fixed, so it is difficult to ensure the stability of the upstream water level

Images