Check valve, liquid intake flange, piston pump and application of check valve in liquid hydrogen pump

The check valve design in liquid hydrogen pumps addresses low response speeds by using a limiting frame and valve body to reduce movement distance and leverage gravity for self-resetting, improving sealing and response speed in liquid hydrogen intake and compression processes.

EP4772781A1Pending Publication Date: 2026-07-08CHINA ENERGY INVESTMENT CORP LTD +1
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
CHINA ENERGY INVESTMENT CORP LTD
Filing Date
2023-12-05
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Existing one-way valves in liquid hydrogen pumps have low response speeds due to their long movement distances and complex structures, which affect the efficiency of liquid hydrogen intake and compression.

Method used

A check valve with a limiting frame and valve body design that allows for reduced movement distance and self-resetting under gravity, combined with a simple structure to enhance sealing and response speed, utilizing a limiting frame with supporting legs and a valve body that reciprocates to control fluid flow.

Benefits of technology

The check valve design significantly improves response speed and sealing performance by minimizing movement distance and utilizing gravity for self-resetting, reducing driving difficulty and enhancing the efficiency of liquid hydrogen intake and compression.

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Abstract

Disclosed in the present application are a check valve, a liquid intake flange, a piston pump and an application of the check valve in a liquid hydrogen pump. The check valve comprises: a limiting frame, which comprises a limiting body and at least two supporting legs evenly distributed on the limiting body, wherein a gap is formed between adjacent supporting legs, and the limiting body is arranged opposite a position to be sealed; and a valve body, which can reciprocate between the limiting body and the position to be sealed. Also disclosed in the present application are the check valve, the liquid intake flange, the piston pump and the application of the check valve in the liquid hydrogen pump, which aim to solve the problem of a low response speed of a one-way valve or a check valve.
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