Mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder

Abstract

The invention discloses a mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder comprising a hydraulic reversing valve and a tail end displacement feedback mechanism. Atthe tail end of the pressurization stroke, a piston of the pressurization cylinder pushes a feedback rod in a connecting body to move, and movement of the feedback rod is transmitted to a valve element of the hydraulic reversing valve through a feedback connecting rod, so that the valve element correspondingly moves; an internal flow channel is switched, and self-reversing of the gas pressurization cylinder is achieved; and the maximum displacement and the movement speed of the valve element of the reversing valve are changed by adjusting the position of the installation fulcrum of the feedback connecting rod and changing the feedback coefficient, and therefore the reversing speed of the pressurization cylinder is adjusted. According to the mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder, compared with an electric control reversing pressurization cylinder, an electromagnetic reversing valve does not need to be adopted, the risk that electric sparksignite working gas is eradicated, the mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder is particularly suitable for pressurizing conveying of flammable and combustible gas such as natural gas, and safety of the gas pressurization cylinder can be remarkably improved, reversing impact of the gas pressurization cylinder is reduced, and therefore vibration and noise of the gas pressurization cylinder are weakened.

Description

technical field [0001] The invention relates to the field of petroleum equipment. More particularly, the present invention relates to a mechanical feedback adjustable speed self-steering gas pressurized cylinder. Background technique [0002] Gas pressurization is widely used in the field of gas transportation, and the compressor is the key equipment for gas pressurization. Hydraulic compressors have been widely used in natural gas refueling sub-stations because of their wide pressure range and relatively low cost. The gas booster cylinder is the core equipment of the hydraulic compressor. [0003] Existing hydraulic compressors generally use a combination of travel switches and electro-hydraulic reversing valves for their gas booster cylinders to drive the hydraulic cylinder to reciprocate, forcing the combined check valves in the booster cylinder to open and close in an orderly manner. Natural gas supercharging. In fact, for flammable and explosive gas pressurized cyli...

AI Technical Summary

Problems solved by technology

In fact, for flammable and explosive gas pressurized cylinders, using electrical signals for reversing control will inevitably lead to the risk of electric sparks detonating the gas medium, which reduces the safety and reliability of the gas pressurized cylinders. At the same time, a large number of explosion-proof The use of appliances also adds significantly to the overall cost of the compressor

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