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Method for stretching main bolts of coolant pump of nuclear reactor

A coolant pump and nuclear reactor technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of increasing the collective dose value of overhaul, high labor intensity, and delaying the maintenance time of the main line, so as to reduce the collective dose value and alleviate Labor intensity, easy to implement effect

Inactive Publication Date: 2017-01-04
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, the work of transporting the stretching cylinder back and forth when disassembling and installing the main bolts was completed by the pure physical labor of the maintenance personnel, and the labor intensity was relatively high. Since the labor intensity was directly proportional to the time required for the completion of the work, it would not only delay the maintenance of the main line time, but also increases the overhaul collective dose value

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  • Method for stretching main bolts of coolant pump of nuclear reactor
  • Method for stretching main bolts of coolant pump of nuclear reactor
  • Method for stretching main bolts of coolant pump of nuclear reactor

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] A method for stretching main bolts of nuclear reactor coolant pumps provided by the present invention, taking the number of main bolts as 30 as an example, comprises the following steps:

[0024] Such as figure 1 As shown, step 1. Number the 30 main bolts from 1 to 30 and mark them;

[0025] Such as figure 1 As shown, in step 2, install the No. 1 cantilever labor-saving manipulator 1 on the upper support frame corresponding to the No. 6 main bolt, and fasten it with fixing bolts; install the No. 2 cantilever labor-saving manipulator 2 on the No. 16 main bolt corresponding on the upper support frame of the upper support frame, and fasten it with fixing bolts; install the No.

[0026] Such as figure 1 As shown in step 3, install one end of the three bolt stretching cylinders on the shortcut grab hooks of No. 1 cantilever labor-saving manipulato...

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Abstract

The invention belongs to the technical field of nuclear power projects of nuclear power plants and particularly relates to a method for stretching main bolts of a coolant pump of a nuclear reactor. The method comprises steps as follows: step 1, a plurality of the main bolts are numbered and marked; step 2, a plurality of cantilever type effort-saving manipulators are mounted on upper support frames corresponding to the main bolts in the middle and are fastened; step 3, a plurality of bolt stretching cylinders are mounted on rapid grapplers of the cantilever type effort-saving manipulators respectively; step 4, the plurality of cantilever type effort-saving manipulators are moved above to-be-stretched main bolts respectively and then stretch the main bolts; step 5, after the main bolts are stretched, the cantilever type effort-saving manipulators are moved above other bolts. The method is convenient to implement, the labor intensity of maintenance persons can be effectively reduced, the working efficiency can be improved, and the collective dose value can be reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear power engineering of nuclear power plants, and in particular relates to a method for stretching main bolts of nuclear reactor coolant pumps. Background technique [0002] In the dismantling and overhaul of the nuclear reactor coolant pump, a relatively basic and very important maintenance procedure will be involved, that is, the correct disassembly and assembly of 30 main bolts distributed horizontally and evenly on the main joint surface of the nuclear reactor coolant pump. According to the requirements of the maintenance procedure, the removal and installation of the main bolts need to be stretched by means of a bolt tensioning machine. When disassembling, each of the 30 main bolts needs to be stretched three times. When installing, it is necessary to stretch the 30 main bolts. The bolts are each stretched 4 times, that is, the same stretching work is performed 210 times in total when removing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/06
CPCB23P19/067
Inventor 李健杨运忠张微孙忠志孟晋韩昇奎刘星昝映辉牛培宇安宁
Owner JIANGSU NUCLEAR POWER CORP
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