Special icehouse for hydropower engineering

Abstract

A special icehouse of hydroelectric engineering consists of ice storing house, ice harrowing machine, hoisting system of ice harrowing machine, ice gate, hoisting system of ice gate, cold air fan, ice screw conveyor and ice outgoing gate. It features that left side plate, right side plate and base plate of ice storing house are prepared by welding steel plate and channel steel together and partial root part of chain wheel tooth on ice harrowing machine is formed in wedge shape.

Description

Technical field [0001] The invention relates to an ice storage, in particular to a special ice storage for hydropower projects. Background technique [0002] A large amount of concrete is used in the dam pouring system of a hydropower station. After the dam body concrete is poured, as the cement hardens, a large amount of hydration heat will be released, which will increase the internal temperature of the concrete. As time goes by, as the heat is gradually dissipated, the internal temperature gradually decreases. At the same time, the volume of concrete is constantly changing. When the concrete is constrained by the foundation or adjacent pouring blocks, it will reduce the safety factor of hydraulic structures and adversely affect stability. Based on dam building experience at home and abroad, temperature control of dam concrete is an effective way to prevent cracks in mass concrete and ensure the quality of concrete. In seasons with higher temperatures, the concrete exit tempera...

AI Technical Summary

Problems solved by technology

However, the existing ice storage has the following defects: 1. The existing ice storage is generally an assembled storage body, and the assembled storage body is integrally welded by steel plates and section steel. , and it is not easy to relocate and demolish

2. The existing large-frame ice rake machine was originally an assembled truss type, and its overall rigidity is not easy to be guaranteed, and it is easy to deform

3. The original design uses ordinary transmission sprockets and transmission chains. When there is ice between the two chain plates of the chain, it is easy to skip teeth, causing the chain to slip off from the sprocket and cannot work normally.

Later, during the operation, it was found that because the looseness of the flake ice was constantly changing, if the conveying speed was kept constant, it would sometimes cause too much flake ice to be transported instantaneously, and it would be blocked at the ice outlet gate.

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