Anti-corrosion device for seawater circulating pump

Abstract

The invention belongs to the technical field of mechanical design, and particularly relates to an anti-corrosion device for a seawater circulating pump. The device comprises an impeller, a sacrificial anode ring, a stud A, a nut A, a protective cover cap and a pump shaft; a circular step is arranged on the upper surface of the impeller, the annular sacrificial anode is arranged on the step in a sleeving mode, the pump shaft is connected with the impeller through the stud A and the nut A, and the protective cover cap is installed on the top of the stud A. The device is simple in structure and convenient to install, the corrosion problem of the pump shaft and the impeller of the seawater circulating pump is effectively solved by adopting the measure of additionally installing the sacrificial anode ring, the exposed part of a fastening bolt is coated with anti-corrosion grease, the protective cover cap is additionally installed and sealed, the bolt and seawater are prevented from being in contact, and the problems that the fastening bolt of the impeller is corroded and difficult to disassemble and the like are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to an anticorrosion device for a seawater circulating pump. Background technique [0002] In the first phase of a nuclear power plant, 2 units are equipped with a total of 8 circulating seawater pumps, which are used to supply circulating cooling water to the steam turbine condenser and discharge the circulating water from the condenser to the sea. The pump type is a vertical axial flow pump, the medium is seawater, and the pump shaft and impeller are connected by 10 M56 bolts. When the pump was periodically disassembled and overhauled, it was found that the pump impeller, pump shaft and other components were corroded to varying degrees, resulting in a decrease in the reliability of the pump operation. The pump is an important equipment in a nuclear power plant, and the decrease in reliability will affect the safe and stable operation of the unit. The exposed ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a seawater circulation pump anticorrosion device, which has a simple structure and is easy to install. It adopts the measure of adding a sacrificial anode ring to effectively solve the corrosion problem of the pump shaft and impeller of the seawater circulation pump. Apply anti-corrosion grease to the part, install a protective cover cap and seal it, cut off the contact between the bolts and seawater, and effectively solve the problems of corrosion and difficult disassembly of the impeller fastening bolts

Images