Installation device for vertical tube plate positioner of heat exchanger

Abstract

The invention relates to the technical field of eddy current testing of heat transfer tubes of heat exchangers, and particularly discloses an installation device for a vertical tube plate positioner of a heat exchanger. The device comprises a bearing platform, a supporting and fixing mechanism, a guide mechanism and a rotating and limiting mechanism, the guide mechanism is two guide rail-shaped horizontal channels from a manhole to a tube plate, the parts, located outside the manhole, of the guide mechanism are connected through the supporting and fixing mechanism, and the guide mechanism canbe fixed on the manhole of a water chamber of the heat exchanger; and the rotating and limiting mechanism is mounted on the guide mechanism, can move the bearing platform from the manhole to a tube plate accessory along the guide mechanism, and can rotate by 90 degrees to reach an installation state. According to the device, the positioner can be horizontally moved from the interior of the water chamber and then rotated by 90 degrees to be switched into an installation state, personnel do not need to enter the water chamber in the whole installation process, and radioactive irradiation borne by the personnel in the installation process is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of eddy current detection of heat transfer tubes of heat exchangers, and in particular relates to a mounting device for a vertical tube sheet positioner of a heat exchanger. Background technique [0002] The passive waste heat removal heat exchanger is the main equipment in the passive waste heat removal system of the AP1000 third-generation nuclear power plant. In the event of an accident or shutdown, the heat exchanger uses natural circulation to transfer the decay heat of the core through the built-in refueling The water in the water tank, the air in the containment vessel and the transfer of the steel containment vessel to the atmosphere play an important role in the safe operation of the reactor. The C-type heat transfer tube is an important part of the waste heat discharge heat exchanger, so that the coolant flowing through the primary circuit inside the heat transfer tube transfers heat to the refueli...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vertical tube plate positioner installation device for heat exchangers, which can solve the problem of implementing the heat transfer tube eddy current inspection positioner device outside the manhole of the heat exchanger, and avoid high doses caused by personnel entering the water chamber rate of radioactive exposure and internal contamination

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