Transfer pump launder system
First Claim
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1. A pump configured to be positioned in a vessel that contains molten metal, the pump comprising:
- (a) a pump base having a pump chamber, a top surface, and a tangential discharge leading to an outlet;
(b) a riser tube having a passage therethrough, a proximal end having an opening in communication with the passage, the proximal end physically attached to the outlet, a distal end opposite the proximal end, wherein the distal end has an opening in communication with the passage, the distal end being open;
(c) a superstructure above the pump outlet, the riser tube being supported by the superstructure;
(d) a launder configured to extend from the vessel to a second vessel, the launder having an open top, and a bottom surface, wherein the distal end of the riser tube is physically connected to the bottom surface of the launder, and the opening in the distal end terminates at or above the bottom surface of the launder and below the open top of the launder, and wherein molten metal can be pumped upward through the riser tube and into the launder;
(e) an opening in the bottom surface of the launder, wherein the distal end of the riser tube is received in the opening in the bottom surface of the riser tube; and
(f) the distal end of the riser tube has a raised back portion and a front portion being lower than the back portion, wherein molten metal reaching the distal end of the riser tube exits the front portion and enters the launder.
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Abstract
A transfer pump system has a pump base with a pump chamber, tangential discharge and an outlet. A riser tube extends from the outlet and terminates at a launder in order to move molten metal out of a vessel with relatively little turbulence. A riser tube for use in the system has a proximal end configured to be connected to the outlet and a distal end that terminates at or above the launder.
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Citations
23 Claims
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1. A pump configured to be positioned in a vessel that contains molten metal, the pump comprising:
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(a) a pump base having a pump chamber, a top surface, and a tangential discharge leading to an outlet; (b) a riser tube having a passage therethrough, a proximal end having an opening in communication with the passage, the proximal end physically attached to the outlet, a distal end opposite the proximal end, wherein the distal end has an opening in communication with the passage, the distal end being open; (c) a superstructure above the pump outlet, the riser tube being supported by the superstructure; (d) a launder configured to extend from the vessel to a second vessel, the launder having an open top, and a bottom surface, wherein the distal end of the riser tube is physically connected to the bottom surface of the launder, and the opening in the distal end terminates at or above the bottom surface of the launder and below the open top of the launder, and wherein molten metal can be pumped upward through the riser tube and into the launder; (e) an opening in the bottom surface of the launder, wherein the distal end of the riser tube is received in the opening in the bottom surface of the riser tube; and (f) the distal end of the riser tube has a raised back portion and a front portion being lower than the back portion, wherein molten metal reaching the distal end of the riser tube exits the front portion and enters the launder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A riser tube for use in a molten metal transfer pump, wherein the molten metal transfer pump includes (i) a pump base having an inlet, a pump casing, and an outlet, and (ii) a superstructure, wherein the riser tube is configured to have a length sufficient to extend from the outlet to a position at which it connects to a launder, the riser tube comprising:
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(a) a passage therethrough; (b) a proximal end having an opening in communication with the passage, the proximal end configured to be physically attached to the output port; (c) a distal end opposite the proximal end, wherein the distal end has an opening in communication with the passage, the distal end being open; and (d) wherein the distal end of the riser tube has a front portion configured to terminate at or above the bottom surface of a launder, and has a raised back portion opposite the front portion, wherein the raised back portion extends above a height of the front portion. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification