A root cleaning device for C-shaped sealing ring of shielded main pump casing

Abstract

The invention relates to the technical field of main pump maintenance, in particular to a root cleaning device for a C-shaped sealing ring of a shielded main pump casing. Including: boom, main shaft moving ring, shielding plate; the main shaft moving ring is arranged between the shielding plate and the boom; Knife. In the prior art, the shielding device, lifting device, and cutting device are independent of each other. When the three need to work together, the shielding device needs to be connected to the lifting device through a connecting structure, and the connecting structure will interfere with the rotation of the cutting device. Thus affecting the construction efficiency. Compared with the prior art, the present invention connects the shielding plate, the turning tool, and the boom into a unified whole through the main shaft moving ring, so that there is no need to set up other connection structures between the boom and the shielding plate, thereby providing a preliminary solution for the rotation of the turning tool. Sufficient space is left, thereby improving construction efficiency.

Description

technical field [0001] The invention relates to the technical field of main pump maintenance, in particular to a root cleaning device for a C-shaped sealing ring of a shielded main pump casing. Background technique [0002] In nuclear power plants, shielded main pumps are known as the heart of nuclear power plants and play a vital role in the safe and reliable operation of nuclear power plant reactor systems. [0003] Taking the AP1000 canned main pump as an example, although the design life reaches 60 years, there is still a risk of damage to the canned main pump during actual use. When the canned main pump is damaged, it is necessary to remove the damaged canned main pump, the bottom of the pump casing is open, and then the remaining C-shaped sealing ring on the end face of the pump casing needs to be removed. However, after the bottom of the pump casing is opened, the environmental dose is high, and the pump casing is far away from the ground, which requires the coordina...

AI Technical Summary

Problems solved by technology

However, after the bottom of the pump casing is opened, the environmental dose is high, and the pump casing is far away from the ground, which requires the coordinated use of the shielding device, lifting device, and cutting device. However, since the three are independent of each other, when the three are used together During the process, it is necessary to directly connect the lifting device to the shielding device, which leads to interference between the connection part between the lifting device and the shielding device and the cutting device, resulting in the inability of the cutting device to fully rotate, and thus causing the cutting device to fail to seal the C-type The ring is cut continuously, which brings great inconvenience to the operation of the operator, thus greatly affecting the construction efficiency

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