Tube plugging device for electric generator hydrogen-cooled device heat exchange tube

Abstract

The invention discloses a tube plugging device for an electric generator hydrogen-cooled device heat exchange tube. The tube plugging device for the electric generator hydrogen-cooled device heat exchange tube comprises a blind-hole wedge head, a tensioning threaded rod, a through-hole wedge head, a sealing pad, fastening nuts, sealing sleeves and a lining sleeve. One end of the tensioning threaded rod is connected with a blind hole formed in the blind-hole wedge head in a threaded mode, the other end of the tensioning threaded rod penetrates through the through-hole wedge head and the sealingpad and then is connected with the fastening nuts, the sealing sleeves are arranged on the outer portions of the blind-hole wedge head and the through-hole wedge head, and the lining sleeve is arranged between the two sealing sleeves. According to the tube plugging device for the hydrogen-cooled device heat exchange tube, the damaged hydrogen-cooled device heat exchange tube can be plugged off accurately, safely, conveniently, rapidly and reliably, the reliability of plugging is effectively improved, and meanwhile, the workload is reduced and the maintenance duration is shortened.

Description

technical field [0001] The invention relates to the technical field of leakage prevention, in particular to a plugging device for a heat exchange tube of a hydrogen cooler of a generator. Background technique [0002] In order to meet the energy-saving requirements of the steam turbine unit, the hydrogen cooler of the generator is cleaned more frequently. After cleaning, the heat exchange tubes may sometimes be damaged and leak. One side of the heat exchange tube is the working fluid hydrogen that needs to be cooled, and the other side is the cooling medium. In order to prevent the media on both sides from colluding due to the damage of the heat exchange tube, it is necessary to reliably seal the damaged heat exchange tube. There are two methods: one is to seal the two ends of the damaged heat exchange tubes of the cooler by tapping them tightly with conical plugs. This method is not reliable and sometimes falls off; the other is to install plugs. Then seal it by sealing an...

AI Technical Summary

Problems solved by technology

[0002] In order to meet the energy-saving requirements of the steam turbine unit, the hydrogen cooler of the generator is cleaned more frequently. After cleaning, the heat exchange tubes may sometimes be damaged and leak. One side of the heat exchange tube is the working fluid hydrogen that needs to be cooled, and the other side is the cooling medium. In order to prevent the media on both sides from colluding due to the damage of the heat exchange tube, it is necessary to reliably seal the damaged heat exchange tube. There are two methods: one is to seal the two ends of the damaged heat exchange tubes of the cooler by tapping them tightly with conical plugs. This method is not reliable and sometimes falls off; the other is to install plugs. Then seal it by sealing and welding. This method is reliable but affected by factors such as environment and medium (for example, medium oil and hydrogen cannot be welded with fire, and welding cannot be performed in a small space, etc.). Both methods have disadvantages! There is also a relatively big problem. In both methods, the tube sheets at both ends of the cooler must be opened to plug the leak. For example, the plugging of the hydrogen cooler of the generator requires the cooler to be pulled out from the generator, and the workload is very heavy. , takes a long time

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