Gate momentarily opening device of dam break experiment

Abstract

The invention discloses a gate momentarily opening device of a dam break experiment. The gate momentarily opening device of the dam break experiment comprises a rotary gate, a portal frame, a jackingand pulling device and a floating type triggering device. The rotary gate is connected with the portal frame through a fixed rotary shaft, and a limiting device is installed on the upper part of the portal frame and used for fixing the rotary gate and reducing thrust of the jacking and pulling device. The jacking and pulling device is fixed to a fixed frame through a hinged device, and the floating type triggering device is arranged on the lower part of the jacking and pulling device and used for triggering a strong spring in the jacking and pulling device. The momentary gate opening device ofthe dam break experiment has the beneficial effects that the gate is opened by using flow pressure and tensile force of the jacking and pulling device, and the effect of gate momentarily opening under all set water levels is realized; a starting mode of the rotary gate is controlled by the floating type triggering device to avoid errors caused by human factors to experiment engineering, the accuracy and repeatability of the dam break experiment are improved, the manufacture principle is simple, the operation is convenient, and the practicability is high.

Description

technical field [0001] The invention belongs to a hydraulic experiment model facility, in particular to a dam break experiment water tank device used for simulating instantaneous gate opening in a dam break experiment. Background technique [0002] Dams are barriers built in streams, rivers and estuaries to prevent flooding, generate hydroelectric power, store water for food or irrigation, and for industrial and commercial purposes. By the end of 2005 alone, there were more than 50,000 dams with a height of more than 15m in the world, among which there were more than 22,000 in China. Dams have played an important role in promoting the development of human society and economy, but if the structure of the dam is damaged or significantly damaged, the dam failure will generally turn into a disaster, and the loss of life and property caused downstream will not be estimated. Based on the seriousness of the consequences of dam failure, countries all over the world have attached gr...

AI Technical Summary

Problems solved by technology

Mechanical and manual opening methods, such as CN 107907299A, mostly use the baffle to quickly lift up or fall down to simulate the situation where the dam collapses instantly, but the repeatability of the experiments in these two opening models is poor, and the error is large; The method of directly opening the gate by using water flow pressure, such as CN 103276688A, mostly sets the rotating shaft at the bottom of the gate, and uses the water flow pressure to open the gate, but the speed of opening the gate depends entirely on the water pressure on one side of the gate. When it is large, the water flow pressure is too small to achieve the effect of opening the gate instantly. At this time, the way of opening the gate by using the water flow pressure cannot completely avoid the influence of the gate on the water flow of the dam break, which directly leads to the generation of dam break waves that cannot accurately simulate tsunami and surge waves.

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