Butterfly-type pneumatic program control valve body

Abstract

The invention provides a butterfly-type pneumatic program control valve body. The valve body comprises an end cover, wherein the end cover and a connecting ring are connected through a hexagon sockethead cap screw; the connecting ring connects the end cover and the valve body together through screws; an O-shaped sealing ring is arranged between a shaft sleeve and a fixed moving shaft, a driving shaft drives a butterfly valve to drive a driven shaft, and a space between the driven shaft the butterfly valve is sealed by a V-shaped sealing ring, the O-shaped sealing ring, a plastic oil seal body, the O-shaped sealing ring, a graphite gasket and a gasket ring; the butterfly valve is arranged in the valve body, the left end of the butterfly valve is connected with the driving shaft through a key and a nut, and the right end is connected with a driven shaft in the same manner; the butterfly valve is fixed on the driving shaft by the nut and is stopped by a stop gasket; the driving shaft isconnected with a magnetic block combination, the driving shaft drives the butterfly valve to rotate, the left end of the driving shaft is connected with an instrument panel, the interior is fixed by ahexagon socket set screw with cone point, and the middle part is matched with a shaft sleeve through a composite bearing to carry out high-efficiency rotation; and the driving shaft is provided witha screw fastening ring, and the screw fastening ring is connected with the valve body through the screws to fasten the driving shaft. The butterfly-type pneumatic program control valve body has the advantages that the sealing performance is high, the flowing condition of gas in the valve body can be accurately expressed, and the flow control characteristic is good.

Description

technical field [0001] The invention belongs to the technical field of program-controlled valves, and in particular relates to a butterfly-type pneumatic program-controlled valve body. Background technique [0002] The program-controlled valve is a cut-off valve driven by pneumatic or hydraulic means. The valve is connected with the DCS distributed control system or PLC to realize the remote control of the computer program. It is widely used in pressure swing adsorption gas separation industries such as methanol cracking hydrogen production, alcohol drying, vinyl chloride concentration recovery, polysilicon tail gas recovery, nitrogen production, oxygen production, and carbon dioxide recovery. The program-controlled valve is the key equipment of the pressure swing adsorption device and an important part to ensure the smooth completion of each process of the pressure swing adsorption and the reliable operation of the system. The main process of pressure swing adsorption inc...

AI Technical Summary

Problems solved by technology

Therefore, the program-controlled valve requires a large number of frequent actions, and its operating requirements and performance are higher than those of general-purpose valves.

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