Valve buffer

Abstract

The invention relates to a valve buffer. By the valve buffer, when a valve is opened or closed, a valve clack rotates to drive a connecting rod to swing, and the connecting rod drives a piston to relatively move in a cylinder; in the initial stage of closing the valve, the valve clack is far away from an adjacent area of a valve seat, the piston moves in a large inner cavity of the cylinder, and when the piston moves left, oil on the right side can flow to the right side and the valve is quickly closed; in the terminal stage of closing the valve, the valve clack is positioned in the adjacent area of the valve seat, oil flows through a damping hole and generates a corresponding damping effect to realize the buffer function, the valve buffer is in a buffer working state, and the valve is slowly closed; in the initial stage of opening the valve, the oil flows to the left side of the piston through a one-way valve and the damping hole, the valve buffer is in a follow-up working state, and the valve can be quickly opened; and in the terminal stage of opening the valve, the valve clack is far away from the adjacent area of the valve seat, the oil flows to the left side of the piston through a large annular channel, the valve buffer is in the follow-up working state, and the valve can be quickly opened.

Description

technical field [0001] The invention relates to a hydraulic buffer, especially a valve buffer. Background technique [0002] At present, pipeline transportation is widely used in electric power, petroleum, chemical industry, steel and other fields, and the medium transported by pipeline includes liquid and gas. It is inevitable to use valves in pipeline transportation. The valves are gradually closed from the open state, and the medium flowing in the pipeline will gradually slow down until it stops flowing. If the closing speed of the valve is too fast, on the one hand, the valve disc is too fast The combination of kinetic energy and hydraulic power possessed by the high speed of movement, the valve disc will have a greater impact on the valve seat, causing the valve to be easily damaged and affecting the service life of the valve. On the other hand, the original fast-flowing medium suddenly stops , its kinetic energy will generate excessive pressure on pipelines and equipm...

AI Technical Summary

Problems solved by technology

It is inevitable to use valves in pipeline transportation. When the valve is closed gradually from the open state, the medium flowing in the pipeline will gradually slow down until it stops flowing. If the closing speed of the valve is too fast, on the one hand, the valve disc is too fast. The combined effect of the kinetic energy and hydraulic power of the moving speed, the valve disc will have a greater impact on the valve seat, causing the valve to be easily damaged and affecting the service life of the valve. On the other hand, the original fast-flowing medium suddenly stops , its kinetic energy will generate excessive pressure on pipelines and equipment, resulting in water hammer or air hammer, causing pipeline rupture and equipment damage

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