Anti-seismic horizontal type middle-opening double-suction fire pump for small-sized reactor

By designing a small stack shock-resistant horizontal mid-open dual-suction fire pump, the double volute structure and large taper water splitters improve water absorption efficiency, and the design of sealing rings and bearing components enhance the earthquake resistance, the existing fire pump has been solved, and the problems of low water absorption efficiency and insufficient earthquake resistance are achieved, achieving more efficient and safe fire pump operation.

CN119844432APending Publication Date: 2025-04-18SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD +1
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Patent Information

Application Number
CN202411905594.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

The existing small reactor horizontal single-suction fire pump has low water absorption efficiency and cannot achieve earthquake resistance, which cannot meet the needs of small reactor nuclear power projects.

Method used

A small-scale stack shock-resistant horizontal mid-open double-suction fire pump is designed. The double volute structure balances the diameter force and adopts a large taper water splitter design to improve the flow of water flow, and enhances the stability and shock resistance of the pump body through the maze design of the sealing ring and the structure of the bearing assembly.

Benefits of technology

It improves the safe operation ability of the pump body during SSE earthquake, enhances the overall stability and strength of the pump body, improves the water absorption and drainage efficiency of the water pump, and ensures the integrity of the fire pump under vibration conditions.

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    Figure CN119844432A_ABST
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Abstract

According to the anti-seismic horizontal type middle-opening double-suction fire pump for the small reactor, the load of a bearing assembly is directly transmitted to a base, the load needing to be borne by a pump body is reduced, the radial force of the water pump can be balanced through the double-volute design, and the sucked water flow is smoother through the large-taper water distribution rib design; the technical scheme comprises a base and a pump body, the pump body is composed of a pump base and a pump cover, a structure similar to double volutes is formed between the pump base and the pump cover, impeller shaft bases are fixedly arranged on the two sides of the pump base, impeller shafts are arranged in the impeller shaft bases, impellers on the impeller shafts are arranged in the center of the pump body, and the impeller shafts are arranged on the impeller shafts. A double water absorption channel and a drainage channel are formed between the impeller and the body; the base, the pump seat and the shaft end assembly support are fixedly connected into an integrated structure through through ribs, a bearing assembly is arranged on the bearing assembly support, and male and female spigots are arranged between a bearing seat in the bearing assembly and the bearing assembly support.
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Citation Information

Patent Citations

  • Anti-seismic fire pump

    CN220134304U

  • Gas faucet

    CN101126462A

  • Freezing water pump used by nuclear power station

    CN106337842A

  • Anti-cavitation single-stage double-suction axially split pump

    CN107524602A

  • Double-seal horizontal middle-opening horizontal double-suction pump

    CN108869306A