Composite pressure reduction type hydrogen energy pressure reducing valve

Abstract

The invention discloses a composite depressurization type hydrogen energy source pressure reducing valve which comprises a valve body with a medium inlet and a medium outlet, a needle-shaped valve element is arranged at the medium inlet and provided with a plurality of wedge-shaped throttling channel notches, a first hedging flow channel is formed in the needle-shaped valve element and communicated with the wedge-shaped throttling channel notches through side flow channels, and a second hedging flow channel is formed in the needle-shaped valve element and communicated with the wedge-shaped throttling channel notches through side flow channels. A second hedging flow channel communicated with the first hedging flow channel is arranged in the valve body, a guide cylinder is arranged in the valve body, the guide cylinder is provided with a push rod via hole and a push rod capable of reciprocating, the push rod is provided with a wedge-shaped notch, a cut-off piece is arranged below the guide cylinder, after the push rod moves downwards, a gap is formed between the cut-off piece and the lower end of the guide cylinder, and a lower spring is arranged between the cut-off piece and the second hedging flow channel. The push rod is sleeved with a piston, an upper spring in the valve body abuts against the piston, the valve body is provided with a constant-pressure gas inlet, and the valve body is provided with an adjusting nut acting on the upper spring. The flow resistance is increased, the flow speed is controlled, the pressure is reduced through the needle-shaped valve element of a special structure, the pressure at the medium outlet is constant, and the pressure stabilizing effect is good.

Description

technical field [0001] The invention relates to the technical field of a pressure reducing valve for industrial automation control, and more particularly to a compound pressure reducing type hydrogen energy pressure reducing valve. Background technique [0002] At present, the most important energy sources in the world are fossil energy, mainly petroleum, coal and natural gas. These fossil energy have the characteristics of non-renewable, high pollution, low energy conversion efficiency, and combustion of greenhouse gases. At present, the energy demand of all countries in the world is increasing, and the reserves of fossil energy are decreasing. Therefore, in the future development of the industrial society, the use of clean and efficient new energy will become a further demand. Hydrogen is a kind of new energy. [0003] High-pressure hydrogen has strong corrosiveness and large temperature changes during high-pressure decompression, which may cause hydrogen corrosion, hydrog...

AI Technical Summary

Problems solved by technology

[0004] At present, the conventional hydrogen energy pressure reducing valve is composed of many scattered functional components such as a filter, a pressure reducing valve, a low pressure sensor, an unloading valve, a manual stop valve, and a one-way valve. The structure is complex, the inlet flow rate is fast, and the pressure reducing effect needs to be improved. Great damage to the hydrogen energy pressure reducing valve

In addition, the existing hydrogen energy pressure reducing valve, in the process of use, needs to be improved in terms of dynamic and stable regulation.

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