Pressure vessel top cover supporting device and method thereof

A support device and pressure vessel technology, applied in sealing, greenhouse gas reduction, climate sustainability, etc., can solve problems such as multi-critical path time, accidental exposure, etc.

Active Publication Date: 2020-12-04
CHINA GENERAL NUCLEAR POWER OPERATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since it takes more critical path time to lift the false head, and there is a risk of accidental exposure when the unhooking personnel of the false head enter the pit when the pool is not decontaminated

Method used

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  • Pressure vessel top cover supporting device and method thereof
  • Pressure vessel top cover supporting device and method thereof
  • Pressure vessel top cover supporting device and method thereof

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Embodiment Construction

[0042] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0043] Such as figure 1 , 2 As shown, the supporting device for the top cover of a pressure vessel according to an embodiment of the present invention is used to support the top cover 2 above the cylinder body 1 of the pressure vessel. The supporting device includes a guide rod 10 and a claw sleeved on the guide rod 10 The assembly 20 and the support body 30 connected to the guide rod 10 .

[0044] The guide rod 10 is arranged on the outer periphery of the top cover 2 parallel to the axial direction of the top cover 2 , and the guide rod 10 includes a first end 11 and a second end 12 connected in the axial direction. The claw assembly 20 is sheathed on the first end 11 of the guide rod 10 for hooking on the light hole...

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PUM

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Abstract

The invention discloses a supporting device and a supporting method for a top cover of a pressure vessel. The supporting device comprises a guide rod parallel to the axial direction of the top cover and arranged on the periphery of the top cover, a claw assembly arranged at the first end of the guide rod in a sleeving mode and used for being hooked to an unthreaded hole of the top cover, and a supporting body rotationally connected to the second end of the guide rod and used for being supported between a cylinder body and the top cover; a first fixing position and a second fixing position which are spaced are arranged at the first end of the guide rod, and the claw assembly can move back and forth between the first fixing position and the second fixing position in the axial direction of the guide rod. The supporting device is used for supporting the top cover of the pressure vessel on the cylinder body, so that the sealing surface of the pressure vessel can be conveniently overhauled and the like; the structure is simple, reliable, light in weight and convenient to disassemble and assemble; the whole equipment can be mounted on the top cover in advance and is hoisted to the cylinder body together with the top cover, so that workers are prevented from mounting in a reactor pool; a nuclear power station overhaul cover closing process is optimized, secondary false end socket hoisting work is reduced, and key path time is saved.

Description

technical field [0001] The invention relates to the technical field of nuclear power equipment maintenance, in particular to a support device and a support method for a top cover of a pressure vessel. Background technique [0002] During the refueling overhaul of a nuclear power plant, the top cover of the reactor pressure vessel needs to be lifted off to perform refueling overhaul. At the end of loading and drainage, the dummy head is used as a temporary radiation shield for the core to reduce the exposure dose of the personnel for decontamination of the reactor pool and maintenance of the sealing surface of the pressure vessel. After the decontamination is completed, lift off the dummy head and reinstall the top cover of the reactor pressure vessel. [0003] Since it takes more critical path time to lift the false head, and there is a risk of accidental exposure when the unhooking personnel of the false head enter the pile pit when the pile pool is not decontaminated. If...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C13/024G21C13/02
CPCG21C13/024G21C13/02Y02E30/30
Inventor 谭毅田荣程书朋胡建强张云朋杨永生张威力
Owner CHINA GENERAL NUCLEAR POWER OPERATION
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