A diaphragm compressor oil pressure accompanying control device and its control system

Abstract

The application belongs to the technical field of compressors, and in particular relates to a diaphragm compressor oil pressure accompanying control device and a control system thereof. The diaphragm used in the existing diaphragm compressor is a vulnerable part and needs to be replaced regularly, which increases the failure rate of the system. The application provides an oil and air pressure accompanying control device, which includes a valve cover and a valve body connected to each other, a piston is arranged inside the valve cover, one end of the piston forms a low-pressure oil chamber with the valve cover, and the other end of the piston is placed in the valve body. The valve body and the other end of the piston form an overflow chamber, the valve body is provided with a spool, and the valve body and the spool are connected through a connecting joint. One end of the channel is connected to one end of the plugging component, the other end of the plugging component is connected to one end of the valve stem, the valve stem is arranged in the valve body, and the other end of the valve stem is connected to the piston. The cross-sectional area of ​​the piston is larger than the overflow channel area of ​​the spool. It is beneficial to the safe and stable operation of the diaphragm compressor and reduces the failure rate.

Description

technical field [0001] The application belongs to the technical field of compressors, and in particular relates to a diaphragm compressor oil pressure accompanying control device and a control system thereof. Background technique [0002] Diaphragm compressor is a positive displacement compressor. Because of its good sealing performance, wide pressure range and large compression ratio, it is widely used in petrochemical fields such as hydrogenation stations to compress and transport various high-purity gases, Precious and rare gases, toxic and harmful gases and corrosive gases. [0003] Diaphragm compressor membrane head structure includes intake valve, exhaust valve, top stop plate, diaphragm, bottom stop plate, one-way valve, piston, oil spill valve, and the inside of the diaphragm cavity is divided into air cavity and oil cavity by the diaphragm. In the air intake stage, the piston moves toward the bottom dead center, and at the same time, the diaphragm moves toward the ...

AI Technical Summary

Problems solved by technology

When the exhaust pressure changes, it is necessary to set the overflow pressure of the oil spill valve to 1.1 to 1.15 times the maximum exhaust pressure, which will cause the oil pressure difference at the end of the exhaust to be too large when working under a non-maximum exhaust pressure state. , so that the life of the diaphragm is reduced

[0005] There are also some diaphragm compressors that use follow-up valve structure, but this kind of follow-up valve divides the exhaust gas into a branch to the gas side of the oil spill valve, and uses a diaphragm to separate the gas and hydraulic oil. The structure is equivalent to a small diaphragm machine. The diaphragm is a vulnerable part. On the one hand, it needs to be replaced regularly. On the other hand, an extra set of diaphragms will increase the failure rate of the system.

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