Automatic scanning device for welding seam of positioning plate of heat exchanger water chamber in nuclear power plant

Abstract

The invention belongs to the technical field of nondestructive inspection of a nuclear power station, and particularly discloses an automatic welding seam scanning device for a water chamber locatingplate of a heat exchanger of a nuclear power station. The automatic welding seam scanning device comprises an installation rail and a scanning assembly arranged on the installation rail in a sliding manner, wherein the scanning assembly comprises a framework arranged on the installation rail in a sliding manner, one or more scanning rail segments rotatably connected with the framework and a scanning rail car provided with a welding seam inspection device; and the scanning rail segments are unfolded to form a scanning rail for the movement of the scanning rail car. The scanning rail of the device adopts a folded structure, and the scanning rail can be folded in the installation and disassembling process, thereby reducing the overall size; after entering the water chamber, the scanning railcan be unfolded to form a long rail, thereby widening the scanning range of the device; and the installation and disassembling of the device are performed outside the water chamber, so that personneldo not need to enter the water chamber, thereby reducing the irradiation risk of the personnel.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing of nuclear power plants, and in particular relates to an automatic scanning device for welding seam of a water chamber positioning plate of a heat exchanger of a nuclear power plant. Background technique [0002] In a typical pressurized water reactor nuclear power plant system, the fission reaction of nuclear fuel in the nuclear reactor releases heat, and the coolant circulates in the primary circuit to take energy out of the core and transfer the heat to the secondary circuit through the steam generator. The water produces steam, which drives a turbogenerator to generate electricity. When the reactor releases energy, it also emits a large number of particles and rays. The coolant is irradiated and activated during the process of bringing out energy, so it is radioactive. [0003] The steam generator water chamber divider is a component that divides the primary side of the steam ...

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Problems solved by technology

[0005] At present, there is no mechanical operation platform for the penetration inspection of the steam generator water chamber partition plate in China. Manually entering the steam generator water chamber for penetration inspection not only exposes the inspectors to strong radiation, but also makes it difficult to carry out quality supervision during the inspection process. It is greatly affected by people, which is not conducive to the comparison and tracking inspection during the operation of the nuclear power plant. Therefore, it is urgent to develop a mechanical operation platform for the penetration inspection of the water chamber partition plate of the steam generator

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