Seal valve with no-wear helical surface

Abstract

The invention discloses a seal valve with a no-wear helical surface, belonging to the technical field of valves. The main points of the seal valve are as follows: the seal valve comprises a valve body; the valve body is provided with a medium inlet and a medium outlet; a valve core and a valve base are movable arranged in the valve body, wherein when the valve core and the valve base are closed, the contour line of the transverse section of the contact face of the valve core and valve base is part of a same constant speed spiral line; when the valve core and the valve base are closed, the valve core rotates outward along the constant speed spiral line, the valve core is disengaged from the valve base, and the valve is opened; and when the valve core is disengaged from the valve base, the valve core rotates inward along the constant speed spiral line, the valve core and the valve base form a contact seal, and the valve is closed. The invention aims at providing a seal valve with a no-wear helical surface, which has a simple structure, small volume and high sealing reliability, and the seal valve is used for controlling the medium flowing in a pipeline.

Description

technical field [0001] The present invention relates to a valve, and more particularly relates to a wear-free helicoid sealing valve. Background technique [0002] The valve controls the flow of the medium in the pipeline through a movable mechanism. The most common way is to drive the valve core to rotate or lift by applying torque to achieve the purpose of switching. Therefore, the reliability of valve sealing is the most important performance. The ideal state of valve core movement is: (1) when the valve is in the closed state, the sealing specific pressure of the sealing pair is uniform and maintains the design requirements; (2) when the valve is opened, it is hoped that the sealing surfaces that are close to each other can be separated first, and then rotated To avoid wear of the sealing surface and reduce the opening torque. The state of (1) above is often relatively easy to achieve, as long as the manufacturing precision of the valve sealing surface is improved. Bu...

AI Technical Summary

Problems solved by technology

However, these improvements have limitations. Although they have certain effects, they also bring new defects.

For example, compared with the original valve, the structure becomes more complex, the number of parts increases, the manufacturing process is difficult, the precision is high, and the manufacturing cost is increased.

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