Nuclear power plant large shielded main pump lower portion C-ring cutting device

Abstract

The invention relates to a nuclear power plant large shielded main pump lower portion C-ring cutting device, and belongs to the technical field of maintenance of a nuclear power plant large shielded main pump. The device comprises a wall mounting assembly and a cutting assembly; the wall mounting assembly comprises a pressing plate and a wall hanging body; the pressing plate is fixed to the end surface of a lower end cover of the main pump, a gap is reserved between the pressing plate and the lower end cover of the main pump, and therefore a tongue portion of the wall hanging body can slide inthe gap; the cutting assembly includes an angle grinder head, a transmission mechanism and a cutting mechanism; the lower portion of the wall hanging body is connected to the angle grinder head, andthe angle grinder head is connected to the cutting mechanism extending into a space where a C ring of the main pump is located through the transmission mechanism. The nuclear power plant large shielded main pump lower portion C-ring cutting device is suitable for a narrow and deep cutting environment, can conduct online cutting, is high in efficiency, controllable in precision, smooth in cutting slit and controllable in foreign matter, and does not cause air radiation pollution.

Description

technical field [0001] The invention belongs to the technical field of maintenance of large-scale shielded main pumps of nuclear power plants, and in particular relates to a C-ring cutting device for the lower part of large-scale shielded main pumps of nuclear power plants. Background technique [0002] When the main pump fails and the lower end cover needs to be disassembled to extract the rotor, the cutting of the lower C-ring must be completed. At present, there has never been a precedent for this cutting technology, and there is no mature experience to learn from. It is necessary to specially develop a cutting plan to be able to realize online cutting; to ensure high cutting efficiency; Cutting distance; foreign matter control and radiation protection at the moment of cutting must be guaranteed. [0003] At present, more mature stainless steel cutting technologies include: machine tool processing, laser cutting, plasma cutting, flame cutting and grinding wheel grinding ...

AI Technical Summary

Problems solved by technology

However, the lower C-ring space is narrow and deep. It is understood that none of the existing commercially available grinders can meet the C-ring cutting space size requirements.

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