Automatic adjustment type multistage measuring weir

Abstract

The invention discloses an automatic adjustment type multistage measuring weir. The automatic adjustment type multistage measuring weir comprises a weir plate, the weir plate is sequentially provided with 2-3 weir crests from low to high, and the center lines of the weir crests overlap; a transmission device is arranged on the top of the weir plate and comprises a transmission rod parallel with the top side of the weir plate, and a transmission motor is arranged at one end of the transmission rod; weir gates vertically sliding between the weir crests are arranged on the outer surface of the weir plate, and the number of the weir gates is smaller than the number of the weir crests by one; a pair of guide grooves are formed in the weir plate in symmetry along the center line and in parallel, are formed in the two sides of the weir gates and are parallel with the weir gates; 1-2 pairs of transmission belts are arranged on the weir plate in symmetry along the center line and in parallel and are arranged on the outer sides of the guide grooves. The automatic adjustment type multistage measuring weir can effectively adapt to the condition that the amplitude of the downstream water level is large, the flow regime of the measuring weir can be guaranteed, the phenomenon that observation cannot be carried out because of submerged flow can be prevented, and the phenomenon that the seepage condition of hydraulic structures is influenced because weir crests are arranged too high and the upstream water level of the measuring weir is too high can be avoided.

Description

technical field [0001] The invention relates to the field of seepage flow measurement, in particular to an automatic adjustment multi-stage water measuring weir. Background technique [0002] The water measuring weir refers to the overflow weir installed in the channels and tanks to measure the flow of water. It is the main equipment for observing the seepage flow. It consists of a weir groove, a water measuring weir plate, and a water level measuring device. [0003] The water measuring weir has two flow states: free overflow and submerged outflow. In order to improve the measurement accuracy, free overflow should be used, but free overflow has higher requirements on the downstream water level of the outlet, and the flow calculation formula of the water measuring weir is mostly an experimental formula. The working conditions are consistent with the experimental conditions of the experimental formula, so the installation of the weir and the flow state of the channel in fron...

AI Technical Summary

Problems solved by technology

Due to the inability of the traditional water measuring weir to solve the sharp rise in the downstream water level, the water measuring weir cannot work during the critical period when the seepage of the dam needs to be paid most attention to, such as flood outbreak or dam discharge, and cannot timely and effectively judge the safety performance of the dam.

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