Non-bonded prestressed cap fireproof device for nuclear power plant

CN224457660UActive Publication Date: 2026-07-03BEIJING ZHONGDI TRANSPORTATION SCI ADVANCED MATERIAL TECH RES CO LTD +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: BEIJING ZHONGDI TRANSPORTATION SCI ADVANCED MATERIAL TECH RES CO LTD
Filing Date: 2025-05-23
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

The existing unbonded prestressed caps for nuclear power plants are insufficient to meet the performance requirements of nuclear reactor containment in terms of fire resistance and heat insulation, and cannot effectively guarantee the safety of nuclear facilities.

Method used

It adopts a multi-layer fire-resistant heat insulation structure, including a stainless steel inner layer, a composite fiber aerogel heat insulation layer, a basalt fiber fire-resistant heat insulation layer, and a ceramic fiber cloth. Combined with a convenient dismantling mechanism and guide chute design, it enhances fire resistance and improves the ease of dismantling and installation.

Benefits of technology

It effectively improves the fire resistance of the cap, can reduce the temperature at high temperatures, and improves the efficiency of dismantling and the ease of installation through a convenient dismantling mechanism, ensuring the safety of nuclear facilities.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224457660U_ABST

Patent Text Reader

Abstract

This utility model belongs to the field of nuclear power plant safety protection technology, specifically a fireproof device for a non-bonded prestressed cap in a nuclear power plant, including a fireproof cap body; a protective sleeve is fitted on the outer side of the fireproof cap body; the fireproof cap body includes a stainless steel inner layer, and a composite fiber aerogel insulating tape wrapped around the outer side of the stainless steel inner layer, the composite fiber aerogel insulating tape having a thickness of 3-6mm; a flame-retardant sealing component wrapped around the outer side of the composite fiber aerogel insulating tape; a basalt fiber fire-resistant insulating tape wrapped around the outer side of the flame-retardant sealing component, the basalt fiber fire-resistant insulating tape having a thickness of 3-6mm; another set of flame-retardant sealing components wrapped around the outer side of the basalt fiber fire-resistant insulating tape; and a ceramic fiber fireproof cloth wrapped around the outer side of the other set of flame-retardant sealing components, the ceramic fiber fireproof cloth having a thickness of 1-2mm; through the combination of the various layers in the fireproof cap body, the fireproof cap body can achieve the effects of fire resistance and heat insulation.

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