US 5,626,164 A · Crack resistant valve plate assembly for a molten metal slide gate valve

Abstract

A crack resistant valve plate assembly is provided for use in a slide gate valve. The valve plate assembly includes a refractory valve plate having an orifice positioned along its longitudinal center line, and truncated corners for focusing a clamping force toward the center line in the vicinity of the orifice to prevent the formation and spreading of cracks. The angular orientation of each of the truncated corners varies with respect to the position of the orifice along the longitudinal center line. Specifically, each of the truncated corners are orthogonal to a line extending from a point tangent with the orifice, across the center line, and through an intersection lines drawn parallel to the converging lengthwise and widthwise plate edges that is spaced from the edges a distance equal to one-half of the maximum diameter of orifice that the plate can effectively operate with.

Claims15

Dependent claims

A crack resistant valve plate for controlling a flow of molten metal in a slide gate valve, comprising

a refractory valve plate having an axis, and an orifice for conducting molten metal that is positioned along said axis, and truncated corners for focusing a clamping force toward said axis in the vicinity of said orifice to prevent the formation and spreading of cracks therein,
wherein each of said truncated corners is orthogonal to a line extending between a tangent point to said orifice, across said axis, and through an intersection of lines drawn parallel to converging plate edges that are spaced from said edges a distance equal to one-half of a width of said orifice.

Dependencies are inferred from the claim text.

Crack resistant valve plate assembly for a molten metal slide gate valve

Life of this patent

Crack resistant valve plate assembly for a molten metal slide gate valve

Life of this patent

Abstract

Claims15