An explosion-proof gas cylinder limiting pressure detection device and a pressure relief structure thereof

By introducing an explosion-proof gas cylinder ultimate pressure detection device into the hydrogen storage cylinder and adopting a mechanically linked pressure relief and pre-extinguishing mechanism, the controllable release and early extinguishing of high-pressure hydrogen gas are achieved, the risk of secondary combustion and explosion of the hydrogen storage cylinder pressure relief device is solved, and the safety and reliability of the hydrogen storage system are improved.

CN121162833BActive Publication Date: 2026-06-09DONGSHI CHASSIS (HUBEI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGSHI CHASSIS (HUBEI) CO LTD
Filing Date
2025-10-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing hydrogen storage tank pressure relief devices pose a risk of secondary combustion and explosion caused by static electricity or external ignition sources when releasing high-pressure hydrogen. They cannot effectively interrupt the combustion chain after hydrogen release, resulting in safety hazards.

Method used

Design an explosion-proof gas storage cylinder ultimate pressure detection device, including a cylinder valve, ultimate release pipe, ultimate release connector, pressure relief mechanism, pressure reduction mechanism and pre-extinguishing mechanism. Through mechanical linkage, it realizes the controllable and orderly release of high-pressure hydrogen, and introduces extinguishing agent in the early stage of the release path to inhibit the combustion reaction.

Benefits of technology

It enables the controllable and orderly release of high-pressure hydrogen, avoids violent impacts caused by sudden pressure drops, actively suppresses combustion reactions caused by static electricity or external ignition sources, eliminates the risk of secondary combustion and explosion during the release process, and improves safety and reliability.

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Abstract

The application relates to the technical field of hydrogen storage cylinder pressure relief and detection, and particularly discloses an anti-explosion gas storage cylinder limit pressure detection device and a pressure relief structure thereof. When the pressure in the hydrogen storage cylinder abnormally rises and reaches a critical value, the pressure relief mechanism is automatically started to guide the high-pressure hydrogen gas to a limit relief joint. In the process, the pressure relief mechanism intervenes in the high-speed hydrogen gas flow to effectively reduce the flow rate and pressure of the hydrogen gas. When the pressure relief mechanism is started, the pre-fire extinguishing mechanism is driven to pre-extinguish the hydrogen gas after the pressure relief of the pressure relief mechanism, controllable and orderly relief of the high-pressure hydrogen gas is realized, violent impact caused by instantaneous pressure drop is avoided, and the early intervention of the fire extinguishing agent in the relief path can actively inhibit the combustion reaction caused by static electricity or external fire sources, so that the secondary explosion risk in the relief process is fundamentally eliminated, and the safety is greatly improved from passive pressure relief to active explosion suppression.
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