Service drainage system for V-shaped tailrace tunnel group

Abstract

The invention provides a service drainage system for a V-shaped tailrace tunnel group. The service drainage system mainly comprises a main pump drainage system and a self-priming pump drainage system.The problem of final drainage of service evacuation and drainage is solved thorough mutual pump drainage before adjacent tailrace tunnel service and flow channels of tailrace tunnels; and due to mutual pump drainage of the adjacent tailrace tunnels, a drainage point does not need to be specially set, and the problem that it is hard to determine the drainage point is solved.

Description

technical field [0001] The invention relates to a maintenance and drainage system for a group of V-shaped tailwater tunnels, which is suitable for water conservancy and hydropower projects. Background technique [0002] The tailrace tunnel is one of the important hydraulic structures of the hydropower station. Whether its structure is safe or not will seriously affect the safe operation of the hydropower station. Therefore, the tailrace tunnel needs to be vented and repaired regularly. According to the slope direction of the floor, the tailrace tunnel can be divided into structural types such as down slope type, reverse slope type and V shape. During venting and maintenance, the accumulated water in the down-slope tailrace tunnel can flow by itself to the front of the maintenance gate, and then be pumped and drained; the accumulated water in the reverse-slope tailrace tunnel can flow automatically to the hydropower station for maintenance through the draft tube vent pipe Co...

AI Technical Summary

Problems solved by technology

[0004] 1 It is difficult to determine the location of the ground drainage point

There may be villages, roads, cultivated land, cultural relics, etc. on the ground corresponding to the lowest point of the tailrace tunnel; at the same time, the discharge volume of the tailrace tunnel is large when it is emptied and overhauled, and the local government, drainage management department, environmental protection department and other government agencies must be consulted on the process. complex

It is difficult or even impossible to determine the location of the ground drainage point

[0005] 2 drain line length

[0007] 4 The design and layout of the drainage system equipment pipeline is not reasonable enough

Each tailrace tunnel corresponds to a set of drainage equipment and pipeline system, but they are not combined and shared, which increases the number of equipment and pipeline length, and the excavation volume of the pump room also increases accordingly, resulting in an increase in construction costs

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