US 2013/0075433 A1Published application

Valve plate assembly for a molten metal slide gate valve

OwnerPatrick D. Kinginventor

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Abstract

An improved 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 centerline, and truncated corners for optimizing the clamping forces to reduce and/or contain cracking caused by thermal expansion. The size and shape of the plate is defined by the design maximum design orifice diameter and the service the plate is designed to address.

Claims49

Dependent claims

An improved common valve plate for controlling a flow of molten metal in a slide gate valve comprising:

a refractory plate having an orifice, a first and second long side, a first and second orifice end truncated corners, a first and second shutoff end truncated corners, a shutoff end, a short side orifice end, a shut off margin circle, and a longitudinal centerline, in which:
(i) the orifice is configured to allow molten metal to flow through the refractory plate, the center of the orifice being positioned at the intersection of the longitudinal centerline and a transverse orifice centerline;
(ii) the first and second long sides being parallel to the longitudinal centerline, the first and second long sides being positioned at opposite sides of the longitudinal centerline at a distance of approximately 1.125 to 1.50 times the maximum design orifice diameter;
(iii) the short side shutoff end is approximately 1.0 times the maximum design orifice beyond a transverse shutoff centerline, the transverse shutoff centerline being perpendicular to the longitudinal centerline and positioned approximately 1.5 to 2.5 times the maximum design orifice diameter from the transverse orifice centerline;
(iv) the short side orifice end is located at an end of the refractory plate opposite of that of the short side shutoff end, the short side orifice end being approximately 1.625 to 2.0 times the maximum design orifice away from the transverse orifice centerline at an end of the refractory plate opposite that of the short side shutoff end, the distance between the short side shutoff end and short orifice end being the sum of the shut off stroke plus the distance from the transverse orifice centerline to the short side orifice end plus the distance from the transverse centerline at shutoff to the shutoff end;
(v) the shutoff margin circle providing an area sufficient to prevent molten metal from an upstream orifice that is adjacent to the refractory plate from flowing around the first and second sides or truncated sides, the shutoff margin circle being centered at the intersection of the longitudinal centerline and transverse shutoff centerline and having a diameter that is approximately 2.0 times the maximum design orifice diameter;
(vi) the first and second shutoff truncate corners being positioned at the shutoff end of the refractory plate, the first truncated shutoff corner being defined by a first line that extends from the intersection of the first long side and the transverse shutoff centerline falls tangent to the shutoff margin circle and continues until the first line intersects the short side shutoff end, the second truncated shutoff corner being defined by a second line that extends from the intersection of the second long side and the transverse shutoff centerline falls tangent to the shutoff margin circle and continues until the second line intersects the short side shutoff end;
and
(vii) the first and second orifice end truncated corners being positioned at the orifice end of the refractory plate, the first and second orifice end truncated corners extending from the intersection of the first and second long sides, respectively, and a second transverse construction line until intersecting the short side orifice end, the first short end truncated corner being perpendicular to a first orifice end construction line, the second short end truncated corner being perpendicular to a second orifice end construction line, in which:
the second transverse construction line is approximately 0.5 times the maximum design orifice diameter away from a first transverse construction line that is approximately 1.0 to 1.5 times the maximum design orifice diameters inside the short side orifice end, the first orifice end construction line extends from the intersection of the longitudinal centerline and the first transverse construction line and through the intersection of the second transverse construction line and a first primary longitudinal construction line, the first primary longitudinal construction line being approximately 0.25 to 0.5 times the maximum design orifice diameter inside the first long side;
and
the second orifice end construction line extends from the intersection of the longitudinal centerline and the first transverse construction line and through the intersection of the second transverse construction line and a first secondary longitudinal construction line, the first secondary longitudinal construction line being approximately 0.25 to 0.5 times the maximum design orifice diameter inside the second long side.

9 more elements

An improved symmetrical valve plate for controlling a flow of molten metal in a slide gate valve, comprising:

a refractory plate having an orifice, a longitudinal centerline, a transverse orifice centerline, a first and a second symmetrical end, a first and second long side, in which:
(i) the transverse shutoff centerlines positioned along said longitudinal centerline at a distance of the shutoff stroke from the transverse centerline at the orifice on either side of said centerline at orifice;
(ii) the first and second long sides being located on opposite sides of the longitudinal centerline, the first and second long sides being positioned approximately 1.125 to 1.50 times the maximum design orifice diameter away from the longitudinal centerline;
and
(iii) the first and second symmetrical ends of the refractory plate being divided generally at the transverse orifice centerline, the first and second symmetrical ends each configured to stop the flow of molten metal from an adjacent upstream orifice, the first and second symmetrical ends both having a first and second truncated side, a transverse shutoff centerline, and a short side cutoff end, in which:
(a) the short side shutoff ends of the first and second symmetrical end being separated by a distance of equal to approximately twice the shutoff stroke plus 1.0 times the maximum design orifice diameter beyond the shutoff stroke on both ends;
(b) the transverse shutoff centerline is positioned approximately 1.50 to 2.0 times the maximum design orifice from the transverse orifice centerline;
and
(c) for both the first and second side symmetrical ends, the first and second truncated sides are joined to short side shutoff end by truncated corners, the truncated corners being tangent to a circle having a diameter 2.0 times the maximum design orifice diameter that is located at the intersection of the longitudinal centerline and the transverse shutoff centerline, the truncated corners extending from the intersection of transverse shutoff centerlines and the first and the second long sides until the truncated sides intersect the short side shutoff ends.

6 more elements

An improved moving valve plate for controlling a flow of molten metal in a slide gate valve, comprising:

a refractory valve plate having an orifice, a first and a second long side, a short side shutoff end, a short side orifice end, a first and a second shutoff end truncated corners, and a first and second orifice end truncated corners, in which:
(i) the orifice is configured to allow molten metal to flow through the refractory plate, the center of the orifice being positioned at the intersection of the longitudinal centerline and a transverse orifice centerline;
(ii) the first and second long sides being parallel to the longitudinal centerline, the first and second long sides being positioned at opposite sides of the longitudinal centerline at a distance of approximately 1.50 to 1.75 times the maximum design orifice diameter;
(iii) the short side orifice end is approximately 1.25 to 1.375 times the maximum design orifice beyond a transverse orifice centerline. the transverse shutoff centerline being perpendicular to the longitudinal centerline and positioned approximately 1.5 to 2.5 times the maximum design orifice diameter from the transverse orifice centerline;
(iv) the short side shutoff end located at an end of the refractory plate that is opposite of that of the short side orifice end, the short side shutoff end being approximately 1.75 to 2.125 times the maximum design orifice diameter from the transverse orifice centerline;
(v) the first and second short side truncate corners being positioned at the short side orifice end of the refractory plate, the first and second short side truncated corners being tangent to a circle that is located at the intersection of the longitudinal centerline and the transverse orifice centerline, the circle having a diameter of approximately 2.50 to 2.75 times the maximum design orifice diameter, in which:
(a) the first short side truncated corner extends from the intersection of a first transverse construction line and the first long side until the first short side truncated corner intersects with the short side orifice end, the first transverse construction line being generally perpendicular to the longitudinal centerline and positioned approximately 0.05 to 1.0 times the maximum design orifice diameters inside the short side orifice end;
(b) the second short side truncated corner extends from the intersection of the first transverse construction line and the second long side until the second short side truncated corner intersects with the short side orifice end;
(vii) the first and second shutoff end truncated corners being positioned at the shutoff end of the refractory plate, the first and second shutoff end truncated corners extending from the intersection of the first and second long sides, respectively, and a third transverse construction line until intersecting the short side shutoff end, the first shutoff end truncated corner being perpendicular to a first shutoff end construction line, the second shutoff end truncated corner being perpendicular to a second shutoff end construction line, in which:
the third transverse construction line is approximately 1.125 to 1.50 times the maximum design orifice diameter away from the transverse shutoff centerline toward the short side shutoff end;
the first shutoff end construction line extends from the intersection of the longitudinal centerline and a second transverse construction line and through the intersection of the third transverse construction line and a first primary longitudinal construction line, the first longitudinal construction line being 0.25 times the maximum design orifice diameter inside the first long side, the second transverse construction line being approximately 0.375 to 0.5 times the maximum design orifice diameter from the transverse shutoff centerline toward the short side shutoff end;
and
the second shutoff end construction line extends from the intersection of the longitudinal centerline and a second transverse construction line and through the intersection of the third transverse construction line and a first secondary longitudinal construction line, the second longitudinal construction line being 0.25 times the maximum design orifice diameter inside the second long side.

10 more elements

An improved stationary plate for controlling a flow of molten metal in a slide gate valve, comprising:

a refractory valve plate having an orifice, a first and a second long side, an entrance end, an exit end, a first and a second entrance end truncated corners, and a first and second exit end truncated corners, in which:
(i) the orifice is configured to allow molten metal to flow through the refractory plate, the center of the orifice being positioned at the intersection of the longitudinal centerline and a transverse orifice centerline;
(ii) the first and second long sides being parallel to the longitudinal centerline, the first and second long sides being positioned at opposite sides of the longitudinal centerline at a distance of approximately 1.125 to 1.25 times the maximum design orifice diameter;
(iii) the entrance end is approximately 1.625 to 1.875 times the maximum design orifice beyond a transverse orifice centerline;
(iv) the exit end being positioned at an end of the refractory plate that is opposite of that of the entrance end, the exit end being approximately 1.50 to 1.625 times the maximum design orifice diameter from the transverse orifice centerline;
(v) the first and second entrance end truncate corners being positioned at the entrance end of the refractory plate, the first and second entrance end truncated corners being tangent to a circle that is located at the intersection of the longitudinal centerline and a first transverse construction line, the circle having a diameter of approximately 2.0 times the maximum design orifice diameter, the first transverse construction line being generally perpendicular to the longitudinal centerline and positioned approximately 1.0 times the maximum design orifice diameters inside the entrance end, in which:
(a) the first entrance end truncated corner extends from the intersection of the first transverse construction line and the first long side, extending to be tangent with said circle, extending until the first entrance end truncated corner intersects with the entrance end,
(b) the second entrance end truncated corner extends from the intersection of the first transverse construction line and the second long side, extending to be tangent with said circle, extending until the second entrance end truncated corner intersects with the entrance end orifice end;
(vii) the first and second exit end truncated corners being positioned at the exit end of the refractory plate, the first and second exit end truncated corners extending from the intersection of the first and second long sides, respectively, and a third transverse construction line until intersecting the exit end, the first exit end truncated corner being perpendicular to a first exit end construction line, the second exit end truncated corner being perpendicular to a second exit end construction line, in which:
(a) the second transverse construction line is approximately 1.0 to 1.25 times the maximum design orifice diameter away from the exit end toward the transverse orifice centerline;
(b) the third transverse construction line is approximately 0.50 times the maximum design orifice diameter away from the second transverse construction line towards the exit end;
(c) the first exit end construction line extends from the intersection of the longitudinal centerline and a second transverse construction line and through the intersection of the third transverse construction line and a first primary longitudinal construction line, the first longitudinal construction line being approximately 0.25 times the maximum design orifice diameter inside the first long side;
and
(d) the second exit end construction line extends from the intersection of the longitudinal centerline and a second transverse construction line and through the intersection of the third transverse construction line and a first secondary longitudinal construction line, the second longitudinal construction line being approximately 0.25 times the maximum design orifice diameter inside the second long side.

11 more elements

Dependencies are inferred from the claim text.

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Abstract

An improved common valve plate for controlling a flow of molten metal in a slide gate valve comprising:

a refractory plate having an orifice, a first and second long side, a first and second orifice end truncated corners, a first and second shutoff end truncated corners, a shutoff end, a short side orifice end, a shut off margin circle, and a longitudinal centerline, in which:
(i) the orifice is configured to allow molten metal to flow through the refractory plate, the center of the orifice being positioned at the intersection of the longitudinal centerline and a transverse orifice centerline;
(ii) the first and second long sides being parallel to the longitudinal centerline, the first and second long sides being positioned at opposite sides of the longitudinal centerline at a distance of approximately 1.125 to 1.50 times the maximum design orifice diameter;
(iii) the short side shutoff end is approximately 1.0 times the maximum design orifice beyond a transverse shutoff centerline, the transverse shutoff centerline being perpendicular to the longitudinal centerline and positioned approximately 1.5 to 2.5 times the maximum design orifice diameter from the transverse orifice centerline;
(iv) the short side orifice end is located at an end of the refractory plate opposite of that of the short side shutoff end, the short side orifice end being approximately 1.625 to 2.0 times the maximum design orifice away from the transverse orifice centerline at an end of the refractory plate opposite that of the short side shutoff end, the distance between the short side shutoff end and short orifice end being the sum of the shut off stroke plus the distance from the transverse orifice centerline to the short side orifice end plus the distance from the transverse centerline at shutoff to the shutoff end;
(v) the shutoff margin circle providing an area sufficient to prevent molten metal from an upstream orifice that is adjacent to the refractory plate from flowing around the first and second sides or truncated sides, the shutoff margin circle being centered at the intersection of the longitudinal centerline and transverse shutoff centerline and having a diameter that is approximately 2.0 times the maximum design orifice diameter;
(vi) the first and second shutoff truncate corners being positioned at the shutoff end of the refractory plate, the first truncated shutoff corner being defined by a first line that extends from the intersection of the first long side and the transverse shutoff centerline falls tangent to the shutoff margin circle and continues until the first line intersects the short side shutoff end, the second truncated shutoff corner being defined by a second line that extends from the intersection of the second long side and the transverse shutoff centerline falls tangent to the shutoff margin circle and continues until the second line intersects the short side shutoff end;
and
(vii) the first and second orifice end truncated corners being positioned at the orifice end of the refractory plate, the first and second orifice end truncated corners extending from the intersection of the first and second long sides, respectively, and a second transverse construction line until intersecting the short side orifice end, the first short end truncated corner being perpendicular to a first orifice end construction line, the second short end truncated corner being perpendicular to a second orifice end construction line, in which:
the second transverse construction line is approximately 0.5 times the maximum design orifice diameter away from a first transverse construction line that is approximately 1.0 to 1.5 times the maximum design orifice diameters inside the short side orifice end, the first orifice end construction line extends from the intersection of the longitudinal centerline and the first transverse construction line and through the intersection of the second transverse construction line and a first primary longitudinal construction line, the first primary longitudinal construction line being approximately 0.25 to 0.5 times the maximum design orifice diameter inside the first long side;
and
the second orifice end construction line extends from the intersection of the longitudinal centerline and the first transverse construction line and through the intersection of the second transverse construction line and a first secondary longitudinal construction line, the first secondary longitudinal construction line being approximately 0.25 to 0.5 times the maximum design orifice diameter inside the second long side.

9 more elements