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Tool and method for quickly closing steam generator manhole cover

A technology for steam generators and manhole covers, which is applied to workbenches, manufacturing tools, hand-held tools, etc., can solve the problems of restricting the progress of on-site work, increasing the radiation level of personnel, and high dose rate of the primary circuit, so as to achieve rapid adjustment of the cover Board height, light weight of the device, and the effect of saving the critical path

Pending Publication Date: 2021-01-29
CNNC FUJIAN FUQING NUCLEAR POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional measurement method uses a steel ruler for measurement. This process requires personnel to measure each bolt (16 bolts in total). This measurement method has long measurement time (the high dose rate of the primary circuit causes an increase in the radiation level of personnel), and the measurement is not accurate. Unfavorable factors such as accuracy have the risk of restricting the progress of on-site work

Method used

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  • Tool and method for quickly closing steam generator manhole cover
  • Tool and method for quickly closing steam generator manhole cover
  • Tool and method for quickly closing steam generator manhole cover

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] like Figure 1-6 As shown, the present invention provides a tool for quickly closing the manhole cover of a steam generator, which includes a cover support rod 9 and a tensile bolt extension length calibration device 10 . The height of cover plate strut 9 is adjustable. The cover support bar 9 is located directly below the steam generator and is used to support the manhole cover of the steam generator; the tensile bolt extension length calibration device 10 is perpendicular to the steam generator manhole cover and is used for the bolt extension length calibration .

[0039] Wherein, the cover support bar 9 includes a base 1 , a support bar 2 and a top plate 3 . The base 1 is located below the support rod 2 , and the top plate 3 is located above the support rod 2 . The base 1 is connected with the support rod 2 by a screw, and the s...

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Abstract

The invention provides a tool for quickly closing a steam generator manhole cover. The tool for quickly closing the steam generator manhole cover comprises a cover plate supporting rod and a stretching bolt extension length determining device, and the height of the cover plate supporting rod is adjustable. The cover plate supporting rod is located under the steam generator and used for supportinga steam generator manhole cover plate. The stretching bolt extension length determining device is perpendicular to the steam generator manhole cover plate and used for determining the bolt extension length. The invention further provides a method for completing closing of the steam generator manhole cover through the tool for rapidly closing the steam generator manhole cover. According to the tooland method for quickly closing the steam generator manhole cover, the adopted device is light in weight, the height of the cover plate can be rapidly adjusted, and the distance between the tops of manhole bolts and the manhole cover plate can be rapidly measured.

Description

technical field [0001] The invention belongs to the technical field of static machine equipment assembly, and in particular relates to a tool and a method for rapidly closing a manhole cover of a steam generator. Background technique [0002] The steam generator belongs to the nuclear first-class equipment of the nuclear power plant and is one of the three main equipments of the nuclear power plant. During the overhaul, after the in-service inspection of the steam generator, the manhole on the primary side of the steam generator needs to be closed. The primary side of the steam generator is the boundary of the primary circuit of the reactor, and the environmental dose of the manhole operation area on the primary side is large, so it is necessary to complete the manhole closing operation quickly and efficiently. [0003] In order to ensure the tightness of the manhole, the primary side of the existing steam generator adopts the method of bolt stretching to complete the cover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25H1/00B25B27/14
CPCB25H1/00B25B27/14Y02E30/30
Inventor 刘吉双刘检军童益华余作长叶茂袁鑫刘亚铭
Owner CNNC FUJIAN FUQING NUCLEAR POWER
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