Sand discharge device for hydropower station

Abstract

The invention discloses a sand-gravel discharge device for a hydropower station. The sand-gravel discharge device for the hydropower station comprises an outer sand-gravel discharge tube, a sieve well derrick and an inner sand-gravel discharge tube, wherein the inner sand-gravel discharge tube is installed in a dam body; the outer sand-gravel discharge tube is installed at one side with a low water level, of the dam body, and communicates with the inner sand-gravel discharge tube; the outer sand-gravel discharge tube is composed of a transition bent tube and a straight discharge tube; the right end head of the transition bent tube is of an arc-shaped structure, and communicates with the interior of the straight discharge tube; a power box is connected to the left end of the straight discharge tube; a blocking ball valve is arranged at a left-side outlet of the transition bent tube; and the sieve well derrick is installed at one side with a high water level, of the dam body, and covers a right-end opening of the inner sand-gravel discharge tube. According to the sand-gravel discharge device for the hydropower station, sand and gravel at the bottom of the dam body are discharged to prevent a water inlet pressure tube from being blocked and protecting an impeller of a water turbine from being damaged, thus normal running of the hydropower station is guaranteed; and the sand-gravel discharge device for the hydropower station is simple in structure, low in cost, and capable of reducing overhaul and maintenance expenses, and reducing economic losses brought by the country and people.

Description

technical field [0001] The invention relates to a sand and stone discharge device, in particular to a sand and stone discharge device for a hydropower station, which belongs to the field of hydroelectric power generation. Background technique [0002] The bottom of the dam body of a hydropower station with a deep water level often accumulates sand and stones. If these things are not discharged in time, they will enter the water inlet pressure pipe and damage the impeller of the water machine. Not only will it cause equipment damage, The increase in maintenance costs will also lead to the normal operation of the hydropower station, affecting the transmission efficiency of the power grid, thereby affecting the electricity consumption of users, and bringing greater economic losses to the country and the people. [0003] In order to solve the above problems, we propose a sand and stone discharge device for hydropower stations. Contents of the invention [0004] The technical ...

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Problems solved by technology

[0002] The bottom of the dam body of a hydropower station with a deep water level often accumulates sand and stones. If these things are not discharged in time, they will enter the water inlet pressure pipe and damage the impeller of the water machine. Not only will it cause equipment damage, The increase in maintenance costs will also lead to the normal operation of the hydropower station, affecting the transmission efficiency of the power grid, thereby affecting the electricity consumption of users, and bringing greater economic losses to the country and the people

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