Method and device for overhauling tailwater cooler

Abstract

The invention discloses a method and device for overhauling a tailwater cooler. The tailwater cooler is located at the top surface of an upper platform. According to the method, a water retaining wallis built on the edge of the top surface of the upper platform, wherein the top of the water retaining wall is slightly higher than the normal tailwater level or the elevation of the generating waterlevel of a unit; steel pipes communicating with a gate slot hole are arranged in the water retaining wall, valves are installed on the steel pipes, and when the tailwater cooler needs to be overhauled, all valves are closed first, and the water body on the side, close to the tailwater cooler, of the water retaining wall is discharged through a temporary water pump; afterwards, the tailwater cooleris overhauled; after overhaul work is completed and overhaul personnel leave the upper platform, water filling and pressure balancing are performed on the tailwater cooler side of the water retainingwall through the temporary water pump, and all the valves are opened so that water areas on two sides of the water retaining wall communicate with each other to realize cooling of the tailwater cooler. In the process of overhauling according to the method, the tailwater cooler does not need to be lifted away from the upper platform, underwater operation is not needed, and therefore overhauling and maintenance can be carried out very conveniently, overhauling efficiency can be improved, and the personal safety of the overhauling personnel can be ensured.

Description

technical field [0001] The invention relates to a method and device for overhauling a tail water cooler, belonging to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] For hydropower projects with large sediment content and many impurities, the tail water cooler usually adopts the circulating cooling water supply method. The tail water cooler is installed on the upper platform of the parapet wall on the side of the tail water outlet maintenance gate unit. Considering that the cooling effect will not be affected, the tail water The cooler is set at the lower part of the normal tail water level as a whole. In the existing technology, divers are used to install and remove the tail water cooler; the specific method is as follows: during maintenance, divers are used to dive to the installation support of the cooler, and the tail water is lifted out after removing the connecting bolts. Cooler inspection, after the i...

AI Technical Summary

Problems solved by technology

[0002] For hydropower projects with large sediment content and many impurities, the tail water cooler usually adopts the circulating cooling water supply method. The tail water cooler is installed on the upper platform of the parapet wall on the side of the tail water outlet maintenance gate unit. Considering that the cooling effect will not be affected, the tail water The cooler is set at the lower part of the normal tail water level as a whole. In the existing technology, divers are used to install and remove the tail water cooler; the specific method is as follows: during maintenance, divers are used to dive to the installation support of the cooler, and the tail water is lifted out after removing the connecting bolts. Cooler inspection, after the inspection is completed, put the tailwater cooler, and then send divers to dive to the installation support of the cooler to connect and fix it. It is very troublesome to ask divers every time during inspection, and it is even more inconvenient for remote places. The underwater alignment installation and removal accuracy of the tail water cooler is poor, and the underwater operation is difficult and dangerous. Therefore, there are still deficiencies in the existing technology and need to be further improved

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