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A large-scale shielded main pump dismantling device and dismantling process in a radioactive environment

A radioactive and environmental technology, applied to parts, pumps, pump components, etc. of pumping devices used for elastic fluids, can solve problems such as impeding core pulling of rotor components, lower radial bearings cannot be disassembled normally, and achieve displacement deformation Minimize, reduce the risk of contamination by radioactive media, and improve the quality and efficiency of maintenance

Active Publication Date: 2021-07-02
SANMEN NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small radial clearance between the lower radial bearing and the shielded main pump stator, the lower radial bearing cannot be disassembled normally after the bulge occurs
2. Core-pulling of the rotor assembly: After the shielding sleeve bulges, especially the bulging of the stator shielding sleeve between the lower radial bearing of the shielding main pump and the rotor winding, it seriously hinders the core-pulling of the rotor assembly, causing the rotor assembly to only Can be drawn out from the direction of the impeller, while the current rotor locking device is installed at the impeller end of the shielded main pump

Method used

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  • A large-scale shielded main pump dismantling device and dismantling process in a radioactive environment
  • A large-scale shielded main pump dismantling device and dismantling process in a radioactive environment
  • A large-scale shielded main pump dismantling device and dismantling process in a radioactive environment

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] A dismantling device for a large shielded main pump in a radioactive environment, including an impeller nut locking pin removal assembly, a C-shaped ring cutting assembly, a lower radial bearing disassembly, and a rotor core pulling assembly. in:

[0053] Such as Figure 1-3 As shown, the impeller nut locking pin removal assembly includes an upper plate 11, a lower plate 12, a connecting screw 13, a double-ended screw rod 14, a fixing nut 15, and an adjusting nut 16; the upper plate 11 and the lower plate 12 pass through the The connecting screw 13 is connected, and one end of the double-ended screw rod 14 is connected to the upper plate 11 through the fixing nut 15, and the other end passes through the lower plate 12 downwards, and is screwed to the impeller nut 17; the adjustment The nut 16 is arranged on the double-headed ...

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Abstract

The invention discloses a dismantling device and a dismantling process of a large-scale shielded main pump in a radioactive environment, belonging to the technical field of maintenance of a large-scale shielded main pump of a nuclear power plant. The invention includes an impeller nut locking pin removal assembly, a C-ring cutting assembly, a lower radial bearing disassembly and a rotor core-pulling assembly. The impeller nut locking pin removal assembly includes an upper plate, a lower plate, a connecting screw, a double-ended screw rod, Fixing nuts, adjusting nuts; C-shaped ring cutting components include wall-mounted components and cutting components; wall-mounted components include pressure plates and wall-mounted main bodies; lower radial bearing removal and rotor core-pulling components include base plates for connecting base plates and pumps The base plate support of the body, the double-ended screw rod used to connect the base plate and the lower radial bearing and the nut connected to the double-ended screw rod, the lifting lugs on the base plate, and the connecting lugs used to connect the base plate and the pump Rotor support tools and spacers for the shaft, main bolts for connecting the foundation plate to the pump body. The invention has simple operation and can safely and efficiently complete the dismantling of the large shielded main pump.

Description

technical field [0001] The invention relates to the technical field of maintenance of a large-scale shielded main pump of a nuclear power plant, in particular to a dismantling device and a dismantling process of a large-scale shielded main pump in a radioactive environment. Background technique [0002] After the nuclear power plant has been in operation for a long time, the shielded reactor coolant pump (hereinafter referred to as: shielded main pump) thrust bearing, shielding sleeve and lower locking cup may have problems. Different from the dismantling process of the shielded main pump in the manufacturing plant, after the long-term operation of the shielded main pump of the nuclear power plant, the radioactive dose of the components in contact with the primary circuit medium is relatively high, so it is necessary to solve the disassembly of the shielded main pump components in a radioactive environment; and also need Solve the cutting of the C-type seal at the lower part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/62B24B27/06
CPCB24B27/06B24B27/0616F04D29/628
Inventor 董宝泽王斌元李松李涛王信东耿加森廖长城曹阳郦元辉王扬王超林鑫辉杨志业
Owner SANMEN NUCLEAR POWER CO LTD
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