Piping noise reduction assembly and conventional island nuclear power plant

By adopting a detachable double-arc plate structure and acoustic coupling energy conversion design on the reheat steam pipeline of the nuclear power plant, the problem of the traditional sound insulation layer being bulky and heavy has been solved. This achieves an organic combination of noise control and support structure, significantly reducing noise levels and protecting the safety of the nuclear power plant's operating environment and the precision of the equipment.

CN122407871APending Publication Date: 2026-07-17CHINA NAT NUCLEAR POWER (BEIJING) CONVENTIONAL ISLAND & POWER ENG RES CENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT NUCLEAR POWER (BEIJING) CONVENTIONAL ISLAND & POWER ENG RES CENT CO LTD
Filing Date
2026-02-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Noise problems in reheat steam pipelines of conventional island nuclear power plants are difficult to solve effectively. Traditional sound insulation layers are bulky and heavy, which cannot meet the compact design requirements of modern nuclear power plants and affect the identification of equipment alarm signals and the hearing health of staff.

Method used

It adopts a detachable double arc plate structure with a noise reduction cavity and through holes inside, filled with noise reduction material. Through acoustic coupling and energy conversion mechanism, it realizes multiple conversions of noise energy and integrates with the support structure for integrated design.

Benefits of technology

It significantly reduces the noise level generated by high-pressure steam flow, mechanical vibration and two-phase flow effect, protects the hearing health of staff, prevents noise from interfering with equipment alarm signals and precision instrument measurements, and meets the compact design requirements of nuclear power plants.

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Abstract

This invention discloses a pipeline noise reduction component and a conventional island nuclear power plant, comprising a first arc plate and a second arc plate. The first arc plate has a first noise reduction cavity, and its first inner surface has a first through hole communicating with the first noise reduction cavity. The second arc plate has a second noise reduction cavity, and its second arc plate has a second inner surface and a second outer surface along its thickness direction. The second inner surface has a second through hole communicating with the second noise reduction cavity. Both the first and second noise reduction cavities are filled with noise reduction material. Based on acoustic coupling and energy conversion mechanisms, this invention effectively solves the noise control problem of reheat steam pipelines in conventional island nuclear power plants, upgrading the passive noise reduction of traditional sound insulation layers to an active energy absorption system. This allows noise energy to be effectively absorbed through multiple acoustic-mechanical-thermal energy conversion processes within the cavity, significantly reducing the noise level generated by high-pressure steam flow, mechanical vibration, and two-phase flow effects.
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