Gas injection valve with buffer mechanism

Abstract

The invention, which belongs to the technical field of the gas injection valve, especially relates to a gas injection valve with a buffer mechanism. A buffer mechanism is arranged at the front side of a valve body and contains a housing, a front end cover, and a rear end cover; and the housing, the front end cover, and the rear end cover are fixed at the front side of the valve body by fasteners. A through hole is formed in the rear end cover; and a head of a valve rod part passes through the through hole and extends into the housing. A buffer block is arranged inside the housing; and a buffer spring is clamped and compressed between the buffer block and the front end cover. When the gas injection valve is closed, the buffer effect is good; and when the valve is opened, no damping occurs and the response speed is fast.

Description

technical field [0001] The invention belongs 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 with electromagnetic drive can adapt to the smaller flow requirements and lower gas pressure conditions. The Chinese invention patent CN104197027A integral double-valve gas injection valve and its assembly method discloses the gas injection valve proposed by the applicant , which can meet the requirements of large flow and high-speed response, but the valve plate of the valve directly collides with the valve seat, and the life of the valve is affected. [0003] Chinese utility model patent CN204358131U discloses a gas injection valve with a buffer mechanism proposed by the applicant. In the later stage of closing of the valve plate of the injection valve, the annular boss of the valve stem is inserted into the buffer groove at the end of the...

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Problems solved by technology

[0002] The high-speed electromagnetic gas injection valve with electromagnetic drive can adapt to the smaller flow requirements and lower gas pressure conditions. The Chinese invention patent CN104197027A integral double-valve gas injection valve and its assembly method discloses the gas injection valve proposed by the applicant , which can meet the requirements of large flow and high-speed response, but the valve plate of the valve directly collides with the valve seat, and the life of the valve is affected

[0003] Chinese utility model patent CN204358131U discloses a gas injection valve with a buffer mechanism proposed by the applicant. In the later stage of closing of the valve plate of the injection valve, the annular boss of the valve stem is inserted into the buffer groove at the end of the valve stem sleeve , the air in the buffer tank is sealed and compressed, and the compressed air in the buffer tank can buffer the valve plate against the valve body. However, due to the compressibility of the gas, the buffer effect of the injection valve is weak. In addition, when the valve core is opened When , the closed gas buffer chamber has a damping effect on the valve core, which affects the response speed of the injection valve

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