Valve buffer

Abstract

The invention relates to a valve buffer. Through the adoption of the valve buffer, when a valve is opened or closed, a valve clack rotates and drives a connecting rod to swing, and the connecting rod drives a piston to move relatively in a cylinder body; at the initial stage of closing of the valve, the valve clack is far from the area adjacent to a valve seat, the piston is in the large inner chamber of the cylinder body, oil can flow to the right side of the piston through a large ring-shaped passage, and the valve buffer is in a servo working state, thus realizing quick closing; at the later stage of closing of the valve, the valve clack is located in the area adjacent to the valve seat, the oil flows through a damping hole and generates a corresponding damping effect to achieve a buffer effect, and the valve buffer is in a buffer working state, thereby realizing buffer closing; at the initial stage of opening of the valve, the oil flows to the left side of the piston through a check valve and the damping hole, and the valve buffer is in the servo working state, thus realizing quick opening; and at the later stage of opening of the valve, the valve clack is far from the area adjacent to the valve seat, the oil flows to the left side of the piston through the large ring-shaped passage, and the valve buffer is in the servo working state, thus realizing quick opening.

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

Images