A tube bundle anti-seismic strip damping device and position limiting method

Abstract

The invention relates to a steam generator in pressurized water reactor nuclear power equipment, and discloses a pipe bundle anti-vibration damping device installed between a pipe bundle assembly anda lower shell of a steam generator. A plurality of anti-vibration strips are arranged in the pipe bundle assembly, the ends of the anti-vibration strips are fixed ends, the fixed ends penetrate out ofthe pipe bundle assembly, and the pipe bundle anti-vibration strip damping device is connected with the fixed ends and comprises a plurality of length-adjustable damping units connected with the different fixed ends and a plurality of elastic fixing units connected with the fixed ends and the lower shell. The device has the beneficial effects that the length of the damping units is adjustable, and therefore the relative position of the adjacent anti-vibration strips can be prevented from being shifted; the fixing units have elasticity, the relative position of the anti-vibration strips and the lower shell can be prevented from being shifted, vibration produced by the pipe bundle assembly during working ca be buffered, the stable heat exchange efficiency of the steam generator can be kept,and the damage risk of the whole system can be reduced.

Description

technical field [0001] The invention relates to a steam generator in a pressurized water reactor nuclear power equipment, in particular to a tube bundle anti-seismic strip damping device. Background technique [0002] The steam generator is the hub of the primary circuit and the secondary circuit of the pressurized water reactor nuclear power plant. The steam-water mixture in the loop is heat-exchanged through the wall of the U-shaped heat exchange tube, so that the steam-water mixture is rapidly vaporized, and a large amount of steam is generated to drive the steam turbine to generate power. During the operation of the steam generator, if the tube bundle assembly vibrates, it will affect the heat exchange efficiency, directly affect the power generation efficiency, and even affect the service life of the steam turbine. [0003] In the tube bundle manufacturing stage of the steam generator, after the first row and the second row of U-shaped heat exchange tubes are threaded,...

AI Technical Summary

Problems solved by technology

[0004] The defect of the existing technology is: the U-shaped heat exchange tube and the anti-seismic strip lack fixing and buffering devices. Due to the limitation of the product structure design, in the subsequent manufacturing activities, the rotation or movement of the lower cylinder assembly will be difficult when the product is shipped to the nuclear power plant site. During the process, the anti-vibration strip assembly has the risk of shifting, resulting in its final position may not meet the design requirements; the vibration of the tube bundle of the steam generator equipment is not limited and buffered during operation, which makes the heat transfer efficiency of the steam generator lower , and will reduce the service life of the whole system

Images