Dead-volume-free rocker arm two-way electromagnetic valve

Abstract

The invention relates to a dead-volume-free rocker arm two-way electromagnetic valve which comprises a valve body, a valve seat, a fluid inlet, a fluid outlet, a rocker arm and a diaphragm. The valve seat covers the valve body, the valve body, the valve seat, the fluid inlet, the fluid outlet and the diaphragm jointly form a flow channel for fluid circulation, and a flow sweeping structure capable of eliminating the fluid dead volume is arranged on the flow channel. The flow sweeping structure comprises a first inclined surface and a flow guide wing, the first inclined surface is an inclined surface on the left part of the diaphragm and is close to the fluid inlet, the flow channel inclines upwards in the horizontal direction from the fluid inlet to the fluid outlet, and the fluid outlet is located in the farthest end of the flow channel; and the flow guide wing forms a flow guide structure for controlling fluid in the flow channel not to rotate so as to prevent formation of the dead volume. After the structure is adopted, the following effects can be achieved: the circulation condition of fluid in the valve is thoroughly changed, the dead volume in the valve is eliminated, the experiment accuracy and precision are improved, and the economic benefit and the experiment effect are very remarkable.

Description

technical field [0001] The present invention relates to the technical field of rocker arm solenoid valve and the technical field of analytical instruments. Specifically, the sweep flow structure is designed by using the sweep flow principle in fluid mechanics to achieve fluid (including reagents such as liquid or gas) in the rocker arm two-way solenoid valve. It has no residual effect and improves the accuracy and precision of the experiment. It is a two-way solenoid valve with no dead volume and is suitable for the field of medical and environmental analysis instruments. Background technique [0002] The rocker solenoid valve currently used in medical treatment is a patented product invented by Japan, the United States and Germany 20 years ago, and the patent technology protection has expired; the most similar patented technology in China is "rocker micro solenoid valve, CN200720103486.7". The patent technology protection has also expired; related technologies at home and a...

AI Technical Summary

Problems solved by technology

[0003] At present, because the rocker solenoid valve is a relatively advanced and fine component, it is often installed in fine, sophisticated and expensive experimental analysis equipment; and this type of equipment is very fine, sophisticated, and expensive, in order to save experimental costs and High cost, usually not dedicated to the experimental detection of one fluid (including reagents such as liquid or gas), but often used in different fluids (including reagents such as liquid or gas) in different periods; but because the existing technology and research are too The focus is on the rocker arm technology, while ignoring a shortcoming in the existing rocker arm valve technology: there is a dead volume in the valve, and when two fluids (including reagents such as liquid or gas) pass through it, the reagent remaining in the valve Affect the accurate value of the measurement

This is caused by the structure of the rocker arm valve. At present, the rocker arm solenoid valve manufacturers in the world are aware of this problem, but the problem has not been fully resolved; therefore, Shenzhen's 2019 key research project "N015" proposed that the medical community needs A rocker arm solenoid valve without dead volume, and hopes that a capable large enterprise will complete the research and development; our company has been researching and manufacturing rocker arm structure solenoid valves for more than ten years. According to the problem of dead volume, we have invented a two-way solenoid valve with no dead volume rocker arm , so that there is no flow dead angle in the flow channel in the valve, that is, all the original reagents in the valve are replaced and discharged by the subsequent fluid (including reagents such as liquid or gas)

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