Adjustable pressure gas pressure reduction device and method

Abstract

The invention discloses an adjustable pressure gas pressure reduction device and method. The adjustable pressure gas pressure reduction device comprises a valve body, wherein the valve body comprises a valve cavity. A gas inlet sealing head of the valve cavity is connected with the upper end face of the valve body in a sealed mode through bolts, and a lower sealing head of the valve cavity is connected with the lower end face of the valve body in a sealed mode through bolts. A gas inlet ventilating steel layer and a gas exhaust ventilating steel layer are placed in the valve cavity in sequence according to the gas flow movement direction, and the space between the gas inlet ventilating steel layer and the gas exhaust ventilating steel layer is filled with a fine sand layer. An adjustable valve assembly which is used for allowing the gas exhaust ventilating steel layer to move towards the gas inlet ventilating steel layer is arranged on the lower sealing head so as to extrude the fine sand layer, and the flow resistance of gas in the process that the gas passes through the fine sand layer can be changed by changing the looseness or compaction degree of the fine sand layer between the gas inlet ventilating steel layer and the gas exhaust ventilating steel layer. According to the adjustable pressure gas pressure reduction device and method, the change of fine sand gaps or adjustment of the fine sand filling coefficient is adopted, and therefore the pressure reduction degree is easily adjusted, and the adjustable pressure gas pressure reduction device and method have the advantages of being simple in structure, low in cost and the like.

Description

technical field [0001] The invention relates to the field of decompression technology, in particular to an adjustable pressure gas decompression device and method. Background technique [0002] The commonly used pressure reducing valve is to adjust the flow of the medium by controlling the opening of the opening and closing parts in the valve body, and reduce the pressure of the medium. Valves within a certain range. [0003] There are many structural types of pressure reducing valves, which can be divided into film type, spring film type, piston type, lever type and bellows type according to the structural form. According to the number of seats, it can be single-seat or double-seat. According to the position of the disc, it can be divided into positive action type and reverse action type. According to the medium, it can be divided into nitrogen pressure reducing valve, hydrogen pressure reducing valve, oxygen pressure reducing valve and so on. [0004] The gas pressure ...

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Problems solved by technology

[0005] However, there are some defects in the existing pressure reducing valve technology: on the one hand, due to structural reasons, the pressure distribution of the gas entering the pressure reducing valve is not uniform enough. The above-mentioned pressure reducing valve has a complex structure, high requirements for parts manufacturing and processing precision, high production cost, and inconvenient maintenance

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