Back gouging device for C-type seal ring capable of shielding main pump case

Abstract

The invention relates to the technical field of main pump maintenance, in particular to a back gouging device for a C-shaped sealing ring capable of shielding a main pump case. The device comprises ahanging arm, a spindle moving ring and a shielding plate, wherein the spindle moving ring is arranged between the shielding plate and the hanging arm; the spindle moving ring is connected to the hanging arm in rotation; the spindle moving ring is connected to the shielding plate in rotation; and the spindle moving ring is provided with a turning tool. In the prior art, the shielding device, the lifting device, and the cutting device are independent of each other. When they need to work together, the shielding device needs to be connected to the lifting device through a connecting structure, and the connecting structure interferes with the rotation of the cutting device, so that construction efficiency is influenced. Compared with the prior art, the present invention connects the shieldingplate, the turning tool, and the crane arm into a unified whole through the main shaft moving ring, so that no other connection structure is required between the crane arm and the shielding plate, thereby preforming the rotation of the turning tool. Ample space is left, and construction efficiency is improved.

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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