Quick shut-off valves for large cryogenic systems

Abstract

The invention discloses a novel quick shut-off valve designed for a large low-temperature system. The quick shut-off valve comprises a sealing cover, a sealing gasket, hexagonal nuts, a spring, a spring containing barrel, a gas charging connector, a pressure-resistant corrugated pipe, an upper valve body, a lower valve body, a valve head anti-loose sleeve, a valve head, a stroke compensation part, a device connecting piece, a valve head connecting rod and the like. In case of an emergency ( power failure, electrical network flashing, water failure and the like), the novel quick shut-off valve designed for the large low-temperature system can protect core components of the large low-temperature system and guarantee that production can be resumed quickly within a very short time, and the safety performance of the large low-temperature system is greatly improved.

Description

technical field [0001] The invention relates to the field of large-scale cryogenic systems, the field of chemical tail gas recovery, and the large-scale low-temperature field with gas flow circulation, especially in the low-temperature field where key equipment such as turbo expanders need to be protected, such as: the field of chemical tail gas recovery, the field of helium cryogenic systems Wait. In particular, it relates to a novel fast and effective cut-off valve. Background technique [0002] In large-scale cryogenic systems and other large-scale liquefaction systems, the turboexpander is the key component and its core component (and the only source of cooling capacity); during operation, it is inevitable to encounter some unexpected events (such as: sudden Power outage, power grid flashing, water outage, abnormal operation of power equipment, etc.), at this time the turbo expander is still running normally, but its auxiliary systems (such as gas supply, water supply s...

AI Technical Summary

Problems solved by technology

[0002] In large-scale cryogenic systems and other large-scale liquefaction systems, the turboexpander is the key component and its core component (and the only source of cooling capacity); during operation, it is inevitable to encounter some unexpected events (such as: sudden Power outage, power grid flashing, water outage, abnormal operation of power equipment, etc.), at this time the turbo expander is still running normally, but its auxiliary systems (such as gas supply, water supply system, etc.) have stopped running, but the high-pressure gas outlet and There is still a large amount of high-pressure gas in the pipelines and heat exchangers at the inlet of the turbo expander, and the expansion operation is still carried out through the turbo expander. The turbo expander is a very big hidden danger, which can easily cause damage to the turbo expander

If the turbo expander is damaged, the entire system will not be able to operate, and the loss is quite large

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