Arrangement and installation method and structure of tail water surge shaft gate and opening and closing equipment

Abstract

The invention discloses an arrangement and installation method and structure of a tail water surge shaft gate and opening and closing equipment. According to the method, a tail water surge chamber is designed into two or more independent tail water surge shafts, adjacent independent tail water surge shafts are separated by a rock ridge, and the top elevation of the rock ridge is slightly higher than the highest surge water level of the tail water surge shafts; at least one tail water surge shaft gate is arranged on each independent tail water surge shaft, and gate groove center lines of all the tail water surge shaft gates are arranged on the same straight line; a connecting beam in the middle of a framed bent of each independent tail water surge shaft is omitted in the water flow direction; the opening and closing equipment is connected to the gates through grabbing beams; the elevation height from the center of a grabbing beam lower hanging head to the top of the rock ridge is larger than the maximum height of a single-section gate leaf of the gate; and the gate is stored and fixed through a beam column combined type locking device or a gate storage groove arranged on a maintenance platform. According to the arrangement and installation method and structure, the tail water surge shaft gate is operated through the movable opening and closing device, and the overhaul requirement of a power station can be met without the rock ridge.

Description

technical field [0001] The invention relates to an arrangement and installation method and structure of a tailwater surge well gate and hoisting equipment, and belongs to the technical field of metal structures of hydropower and water conservancy projects. Background technique [0002] For tailwater surge wells with multiple units, in order to reduce the impact of water hammer caused by load shedding of a single unit on the power generation of other units, generally more than two units of tail water surge wells are usually separated by rock ridges. And the setting height of the rock ridge should be higher than the highest surge water level, otherwise the gushing water will overflow the surge well and cause damage to the facilities around the tailwater surge well; The gates of the tail water surge wells adopt the "one door, one machine" arrangement operated by a fixed winch, and there is a problem of excessive investment in metal structures; if multiple tail water surge wells...

AI Technical Summary

Problems solved by technology

[0002] For tailwater surge wells with multiple units, in order to reduce the impact of water hammer caused by load shedding of a single unit on the power generation of other units, generally more than two units of tail water surge wells are usually separated by rock ridges. And the setting height of the rock ridge should be higher than the highest surge water level, otherwise the gushing water will overflow the surge well and cause damage to the facilities around the tailwater surge well; The gates of the tail water surge wells adopt the "one door, one machine" arrangement operated by a fixed winch, and there is a problem of excessive investment in metal structures; if multiple tail water surge wells are used to share the tail water pressure regulation According to the layout of the well gate, the gate of the tailwater surge well needs to be operated by mobile hoisting equipment, because the bottom of the gate of the tailwater surge well must be higher than the top of the rock ridge to meet the requirements of lifting the gate to all the gates through the mobile hoisting equipment In the gate slot, this will result in a higher height of the tailwater surge well cavern, which will increase investment; in addition, the traditional tailwater surge well gate is directly locked on the inspection platform at the top of the gate slot, because the height of the platform is higher than that of the highest surge well. The wave water level is relatively low, and it is easy to overturn and cause damage under the impact of repeated fluctuations in the gushing water; in addition, the traditional method of setting rock anchor hooks and installing gates and hoisting equipment through temporary lifting equipment for tailwater surge tanks is relatively heavy. The gates and hoisting equipment, rock anchor hooks bear limited loads, which usually do not meet the requirements. Therefore, the existing technology is still not perfect and needs to be further improved.

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