Flexible mud slag flushing gun head of triangular arrangement heat transfer tube

Abstract

The invention relates to the technical field of cleaning of heat transfer tubes of steam generators, in particular to a flexible mud slag flushing gun head of a triangular arrangement heat transfer tube. The flexible mud slag flushing gun head is characterized in that a supporting cylinder body is of a cavity structure, and the end face of one end of the supporting cylinder body is of an inclinedsurface structure; a deflection gear train and a push-pull gun head are arranged on the inclined surface, and a certain included angle is formed between the central axis AA' of the push-pull gun headand the axis OO' of a steel belt channel in the supporting cylinder body; a push-pull motor fixed in the supporting cylinder body drives a push-pull chain wheel in the push-pull gun head to rotate through transmission, so that a steel belt is driven to move forwards or backwards; and a deflection motor is further arranged in the supporting cylinder body, and the deflection motor drives the deflection gear train to rotate through transmission so as to drive the push-pull gun head connected with the deflection gear train to swing. According to the flexible mud slag flushing gun head of the triangular arrangement heat transfer tube, the push-pull steel belt extends downwards into the heat transfer tube in an inclined mode, the steel belt reaches a to-be-washed region of the surface of a tubeplate through deflection, and meanwhile, the situations that the steel belt cannot be subjected to subsequent pushing and pulling and deflection actions due to the fact that the steel belt extends into the heat transfer tube and then integrally rotates a gun body are avoided.

Description

technical field [0001] The invention belongs to the technical field of cleaning heat transfer tubes of steam generators, and in particular relates to a flexible sludge washing gun head for heat transfer tubes arranged in a triangle. Background technique [0002] Due to the possible serious consequences of sludge deposition on steam generators, the removal of sludge has become an important part of the maintenance and management of steam generators in nuclear power plants. In order to better solve the problem of sludge deposition, it is necessary to periodically wash the flexible steel Stretch between the heat transfer tubes for flexible sludge cleaning. [0003] In some active nuclear power plants, the heat transfer tubes of some steam generators are arranged in a triangle, and the angle between the heat transfer tubes and the axis of the central tube gallery is 120°. During the overshoot of the flexible flushing, the steel belt is installed on the flexible gun from the steam...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flexible sludge flushing gun head for triangular heat transfer tubes, which solves the problem of pushing steel strips into the heat transfer tubes and deflecting the steel strips to reach the surface of the tube plate for the triangular steam generator. At the same time, prevent the steel belt from extending into the heat transfer tube and then rotate the gun body as a whole, which will cause the steel belt to be unable to perform subsequent push, pull and deflection actions

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