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Nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device

A nuclear power plant, large-scale technology, applied in the direction of hand-held tools, manufacturing tools, etc., can solve the problems of increasing the collective dose value of maintenance personnel, prolonging maintenance time, etc., and achieve the effects of improving maintenance efficiency, reducing labor intensity, and facilitating operation

Pending Publication Date: 2020-09-25
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the labor intensity is directly proportional to the work completion time, this will not only prolong the maintenance time, but also increase the collective dose value of the maintenance personnel

Method used

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  • Nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device
  • Nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device
  • Nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device

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Embodiment Construction

[0032] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0033] Such as figure 1 As shown, the large cover 2 of the pump body is a circular plate structure, and 16 mounting holes are evenly processed on the circumference, and 16 main bolts 8 are arranged through the main bolt nuts 9 and the main bolt gaskets 10 . A shaft hole is machined in the center of the pump body cover 2, and the pump shaft is installed in the hole.

[0034] The balance drum 1 is fixed on the pump shaft and fits with the large cover 2 of the pump body in a gap to connect the inlet and outlet of the pump body to balance the axial force of the rotor.

[0035] The stretching labor-saving device in the present invention will remove the main bolt 3 from the large cover 2 of the pump body.

[0036] The stretching labor-saving device includes a sleeve 11 connected to the pump body cover 2 and set on the outside of the pump shaft, a ratchet s...

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Abstract

The invention belongs to the field of nuclear power station rotating equipment maintenance, and particularly relates to a nuclear power station large horizontal centrifugal pump king bolt stretching labor-saving device. The device comprises a sleeve arranged outside a pump shaft in a sleeving mode and a rotating support connected with the sleeve, wherein the rotating support rotates along with rotation of the sleeve, a ratchet structure is arranged outside the sleeve and fixedly connected with the rotating support, stretching cylinders are arranged at the two ends of the rotating support, whenthe sleeve rotates, the stretching cylinders can rotate along the circumference where a king bolt is arranged, rolling wheel supporting assemblies are arranged below the sleeve, the concentricity ofthe stretching cylinders at the ends of the rotating support and the king bolt is achieved by controlling the rotating position of a gear, and it is guaranteed that the king bolt is accurately alignedduring dismounting. According to the device, the device is simple in structure and convenient to operate for personnel, the labor intensity of maintenance personnel can be effectively reduced, the safety is improved, the irradiation time of the personnel is shortened, and the maintenance efficiency is improved.

Description

technical field [0001] The invention belongs to the field of inspection and maintenance of rotating equipment in nuclear power plants, and in particular relates to a stretching and labor-saving device for dismantling and overhauling main bolts of large horizontal centrifugal pumps. Background technique [0002] The overhaul of the nuclear power plant requires dismantling and overhauling of the centrifugal pump. The Tianwan Nuclear Power Plant uses a large horizontal centrifugal pump (the motor uses sliding bearings, and the motor voltage is 6KV). The disassembly and maintenance of the centrifugal pump is a very important maintenance process, and the 16 main bolts evenly distributed on the main joint surface need to be disassembled and assembled correctly. [0003] According to the requirements of the maintenance procedure, to install the main bolts, the main bolts need to be stretched by means of a bolt tensioning machine. Each of the 16 main bolts is stretched 4 times, and ...

Claims

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Application Information

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IPC IPC(8): B25B27/14
CPCB25B27/14
Inventor 赵庆玉周为凯孙恺阳昝映辉付德威安宁韩昇奎徐猛张微孟晋任书强路玉彬冯光宇崔靖雨崔鹏
Owner JIANGSU NUCLEAR POWER CORP
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