Electromagnetically-driven buffer type gas injection valve

Abstract

The invention discloses an electromagnetically-driven buffer type gas injection valve. The electromagnetically-driven buffer type gas injection valve comprises a valve body, a valve core, a valve seat and a buffer mechanism, wherein a valve plate of the valve core is provided with an outer sealing conical surface; the valve seat is provided with an inner sealing conical surface; a cone angle of the outer sealing conical surface is greater than or smaller than that of the inner sealing conical surface; the buffer mechanism comprises a buffer seat which is provided with an end cover; the buffer seat is fixedly arranged on the valve body; a buffer block and a damping block are movably arranged in a cavity defined by the buffer seat and the end cover; the buffer seat is provided with an impact surface; a part of the damping block is positioned between the impact surface of the buffer seat and the inner side end surface of the end cover; an elastic cushion is arranged between the part of the damping block and the inner side end surface of the end cover; a buffer spring is clamped between the buffer block and the damping block. The electromagnetically-driven buffer type gas injection valve disclosed by the invention is provided with the buffer mechanism having a multi-buffer function, so that the defect of re-opening of the valve core caused as the valve core is impacted by the buffer block after rebounding of the buffer block is overcome, the buffer effect is good, the response speed is fast, and the service life of the electromagnetically-driven buffer type gas injection valve is prolonged.

Description

technical field [0001] The invention relates to the technical field of gas injection valves, in particular to a gas injection valve with a buffer mechanism. Background technique [0002] The high-speed electromagnetic gas injection valve driven by electromagnetic can adapt to the smaller flow requirements and lower gas pressure conditions. The Chinese invention patent CN104197027A discloses an integral double-valve gas injection valve and its assembly method, which can meet the high-speed response of large flow Requirements, but the valve plate of the valve directly collides with the valve seat, and the life of the valve is affected. [0003] Chinese invention patent CN105042177A discloses a gas injection valve with a buffer mechanism proposed by the applicant. During the closing process of the valve core, under the action of the return spring, the valve core moves to the closing direction at high speed. When seated, the head of the valve stem hits the buffer block first, a...

AI Technical Summary

Problems solved by technology

However, with the high-speed movement of the shock absorber hitting the front cover and rebounding, it will hit the valve core again, causing the valve core to open again, affecting the movement and service life of the gas injection valve

Furthermore, the sealing between the valve plate and the valve seat adopts surface sealing, and the sealing surface wears unevenly, resulting in gas leakage.

In addition, due to the needs of assembly, the outer diameter of the front valve plate is smaller than the outer diameter of the rear valve plate, so that the areas of the large and small valve plates are different, resulting in an unbalanced pressure of the gas acting on the valve core, which affects the movement of the valve core. speed

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