Three-eccentric valve with symmetric leakage stop ring

Abstract

The invention relates to a three-eccentric valve with a symmetric leakage stop ring. The three-eccentric valve comprises a valve body, a valve piece and the leakage stop ring, wherein opening and closing of the valve piece can control the flow of a passing fluid; the valve piece forms an asymmetric cone shape, in which two extension lines formed at the upper and lower lateral margins are asymmetric, the slope factor (absolute value), relative to the center line of the valve piece, of the extension line at the upper lateral margin is greater than that (absolute value), relative to the center line of the valve piece, of the extension line at the lower lateral margin; the two inclined lines extend towards the left side to form a crossing point, and the distance between the crossing point and the center line of the valve body is not larger than the semidiameter of the valve piece; the leakage stop ring is an O-shaped ring and is accommodated on the outer side of the valve piece to prop against a valve seat; the leakage stop ring is radially symmetric about the axis passing through the center of the leakage stop ring.

Description

technical field [0001] The invention relates to a valve body, especially a triple eccentric valve with a symmetrical non-leakage ring. Background technique [0002] In the prior art, there is a butterfly valve. The butterfly valve includes a shaft hole passing through in the radial direction for a driving shaft to be inserted to drive the butterfly valve to rotate to open or close the valve. It is designed with three eccentric shafts. Such as Figure 8 Shown is a triple eccentric valve in the prior art, wherein the valve includes: a valve body, the valve body has a valve chamber; a valve stem, the valve stem penetrates the valve body. A valve seat 30' is accommodated in the valve chamber. An anti-leakage ring 32', the anti-leakage ring 32 is an O-ring, and the two ends of the radial section of the anti-leakage ring 32 are asymmetrical. A valve part 31', the valve part 31' is arranged on the valve seat 30', the valve part 31' is provided with a shaft hole in the axial direc...

AI Technical Summary

Problems solved by technology

Because the anti-leakage ring is asymmetrical to the radial circle formed by its axis, it is quite difficult to manufacture, and there will be directional problems during installation. The anti-leakage ring must be embedded in a set orientation In the valve body

But when the anti-leak ring slips, it will destroy the water seal

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