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

Abstract

The invention relates to a dead-volume-free rocker arm three-way electromagnetic valve which comprises a valve body, a valve seat, a common port, a normally-open port, a normally-closed port, a rocker arm and a diaphragm, the valve seat covers the valve body, the rocker arm is arranged on the valve body, the diaphragm is arranged on the valve body and the rocker arm, the common port, the normally-open port and the normally-closed port are all arranged on the valve seat, and the diaphragm is arranged on the valve seat. A first flow guide wing in a curved surface body shape is arranged below the sharing opening, a fourth flow guide wing in a long strip block body shape is fixedly connected to the position, on one side of the first flow guide wing, of the diaphragm, the first flow guide wing and the fourth flow guide wing form a flow guide structure, the flow guide structure divides fluid flowing into the sharing opening into two parts, one part flows to a normally-closed opening, and the other part flows to a normally-closed opening. And the other stream flows to a normal opening. According to the invention, the basic knowledge of fluid mechanics is utilized, the structural design in the valve is innovated, and reagents originally existing in the valve, especially reagents in flowing dead angles, can be completely replaced and discharged by utilizing subsequent fluid (including reagents such as liquid or gas).

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 three-way solenoid valve. No residual effect, improve the accuracy and precision of the experiment. A rocker three-way solenoid valve with no dead volume suitable for medical and environmental protection and analytical instrument fields. 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 abr...

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 costs, usually not dedicated to the experimental detection of one fluid (including reagents such as liquid or gas), but often flow through different fluids (including reagents such as liquid or gas) at different time periods; but because of existing technology and research Too much emphasis is placed 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 remaining in the valve The reagent affects 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 The rocker arm solenoid valve without dead volume, and hopes that a capable large enterprise can complete the research and development; our company has been researching and manufacturing the rocker arm structure solenoid valve for more than ten years, and according to the problem of dead volume, invented a rocker arm three-way solenoid valve without dead volume , 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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