Oil-gas pressure accompanying control device for diaphragm compressor and oil-gas pressure accompanying control system for diaphragm compressor

Abstract

The invention belongs to the technical field of compressors, and particularly relates to an oil-gas pressure accompanying control device for a diaphragm compressor and an oil-gas pressure accompanyingcontrol system for the diaphragm compressor. A diaphragm for an existing diaphragm compressor is a damageable part and needs to be replaced regularly, and the failure rate of a system is increased. The invention provides the oil-gas pressure accompanying control device, the oil-gas pressure accompanying control device comprises a valve cover and a valve body which are connected with each other, apiston is arranged in the valve cover, one end of the piston and the valve cover form a low-pressure oil cavity, the other end of the piston is arranged in the valve body, the valve body and the other end of the piston form an overflow cavity, a valve element is arranged on the valve body and connected with the valve body through a connecting joint, a high-pressure oil inlet channel is arranged in the connecting joint, an oil overflow channel is arranged in the valve element, one end of the oil overflow channel is connected with one end of a blocking assembly, the other end of the blocking assembly is connected with one end of a valve rod, the valve rod is arranged in the valve body, the other end of the valve rod is connected with the piston; and the sectional area of the piston is larger than the area of an overflow channel of the valve element. Safe and stable operation of the diaphragm compressor is facilitated, and the failure rate is reduced.

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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