Flexible drive system for a secondary side metal foreign object cutting tool of a steam generator

By designing a flexible transmission system, the problem of motor motion transmission within the confined space of the secondary side of the steam generator was solved, enabling effective driving of the electrode plates, avoiding damage to the heat transfer tubes, and achieving remote flexible transmission.

CN117773243BActive Publication Date: 2026-06-09CHINA NUCLEAR POWER OPERATION TECH CORP
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Patent Information

Application Number
CN202311790256.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-25
Publication Date
2026-06-09
Estimated Expiration
2043-12-25

AI Technical Summary

Technical Problem

Existing technologies make it difficult to effectively drive the motor to move within the confined space of the secondary side of a steam generator and transmit the motion to the electrode plates for electrical discharge machining. Furthermore, traditional mechanical cutting carries the risk of damaging the heat transfer tubes.

Method used

A flexible transmission system was designed, including a head transmission mechanism, a flexible transmission mechanism, and a tail drive mechanism. The motor motion outside the motor is transmitted to the electrode plate through the flexible transmission structure to realize the reciprocating feeding motion of the electrode plate.

Benefits of technology

It achieves effective motion drive of electrode plates in a narrow area, reduces head weight and volume, avoids damage to heat transfer tubes, and realizes remote flexible transmission.

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Abstract

The application relates to a flexible transmission system of a steam generator secondary side metal foreign matter cutting tool, characterized in that the flexible transmission system comprises a head transmission mechanism, a flexible transmission mechanism and a tail driving mechanism, the head transmission mechanism is sequentially connected with the flexible transmission mechanism and the tail driving mechanism. The flexible transmission system of the steam generator secondary side metal foreign matter cutting tool transmits the movement of a motor arranged outside a steam generator to an electrode sheet between steam generator pipes and drives the electrode sheet to make reciprocating feeding movement.
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Citation Information

Patent Citations

  • Tube cutting equipment in heat transfer tube of steam generator

    CN109434226A

  • Video inspection guiding device for tube sheet outer ring gallery of steam generator

    CN109540909A