Dismounting tool of main bolt and main nut of reactor pressure vessel and using method thereof

A technology for pressure vessels and disassembly tools, which is applied in the field of maintenance of nuclear power plants, and can solve problems such as mounting on main bolts
CN109968282APending Publication Date: 2019-07-05RES INST OF NUCLEAR POWER OPERATION +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RES INST OF NUCLEAR POWER OPERATION
Publication Date
2019-07-05

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Abstract

The invention relates to a dismounting tool of a main bolt and a main nut of a reactor pressure vessel and a using method thereof. The dismounting tool comprises a body structure, an external power device and a handle, wherein the body structure comprises a round base, a large gear is embedded in the base, the large gear is positioned on the base through a copper ring, moreover, the copper ring isfixed on the base through a screw A, a rotating ring is arranged on the lower end surface of the large gear, three clamping groove type slideways are arranged on the rotating ring, a shifting tooth is arranged in each clamping groove type slideway, moreover, the shifting teeth, the rotating ring and the large gear are connected into a whole through a screw B, a limiting structure is arranged right above the shifting teeth, and is used for clamping the dismounting tool on the upper end surfaces of the main bolt and the main nut so as to limit the axial position of the dismounting tool, and aninner gear determined by the three shifting teeth is meshed with an outer gear on the main bolt and the main nut. The handheld tool for electrically dismounting the main bolt and the main nut of the reactor pressure vessel is provided.
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Description

technical field

[0001] The invention belongs to the field of maintenance of nuclear power plants, and in particular relates to a tool for disassembling and installing main bolts and nuts of a reactor pressure vessel and a method for using the same. Background technique

[0002] There are a large number of main bolts and nuts on the pressure vessel. During the overhaul of the nuclear power plant, the main bolts and nuts need to be removed to clean and inspect the main bolts and nuts. After cleaning and inspection, the nuts need to be installed on the main bolts. Because there is no special tool, the main nut of the reactor pressure vessel is removed from the main bolt or installed on the main bolt manually at present. This disassembly mode has a large workload and low work efficiency.

[0003] The invention relates to a tool for removing and installing main bolts and nuts of a reactor pressure vessel, which is mainly used for quickly removing or quickly installing the main n...

Claims

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