Transfer Pump Launder System

• US 20190270134A1
• Filed: 05/17/2019
• Published: 09/05/2019
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Molten Metal Equipment Innovations Incorporated (Molten)
• Original Assignee: Molten Metal Equipment Innovations Incorporated (Molten)
• Inventors: Cooper, Paul V.
• Granted Patent: US 10,675,679 B2
• Time in Patent Office: Days
• CPC Class Codes: B22D 45/00 Equipment for casting, not otherwise provided for
• CPC Class Codes: F04D 29/607 means for positioning from outside
• CPC Class Codes: F04D 7/065 for liquid metal
• CPC Class Codes: Y10T 137/85978 With pump

Abstract

Disclosed is a transfer pump having a pump base with a pump chamber, tangential discharge and an outlet in the top surface of the pump base. 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.

Claims

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, wherein the pump base comprises a top surface, and an output port;

(b) a riser tube having (i) a passage therethrough, (ii) a proximal end having an opening in communication with the passage, the proximal end being connected to the output port, and (iii) a distal end opposite the proximal end, wherein the distal end has an opening in communication with the passage, the distal end having an opening;

(c) a superstructure above the pump base, the superstructure configured to support the riser tube; and

(d) a launder having (i) a first end juxtaposed the riser tube, (ii) an open top, and (iii) a bottom having a launder opening;

wherein the distal end of the riser tube is positioned in the launder opening, and terminates at or above the bottom surface of the launder.

2. The pump of claim 1, wherein the distal end of the riser tube terminates at or above the launder opening.

3. The pump of claim 1, wherein the launder has a raised launder back portion that extends above the launder opening.

4. The pump of claim 3, wherein the raised launder back portion has a height between:

being even with the top surface of the launder to being 3″

above the top surface of the launder.

5. The pump of claim 1, wherein the raised riser tube back portion has a height between:

being even with the top surface of the launder to being 3″

above the top surface of the launder

6. The pump of claim 1 that further includes a motor positioned on the superstructure.

7. The pump of claim 1 that further includes support posts attached to the pump base and to the superstructure.

8. The pump of claim 1 that further includes a drive shaft having a first end connected to a motor, and a second end connected to a rotor, wherein the rotor is positioned in the pump chamber.

9. The pump of claim 8, wherein the drive shaft comprises a rotor shaft with a first end that is received in a coupling, and a motor shaft having an end that is also received in the coupling.

10. The pump of claim 9, wherein the rotor shaft has a second end that is threadingly received in the rotor.

11. The pump of claim 1, wherein the launder has (a) a first portion on a first side of the launder opening, and (b) a second portion on a second side of the launder opening.

12. The pump of claim 1, wherein the distal end of the riser tube terminates within 3″

above the bottom of the launder.

13. The pump of claim 1, wherein the pump base further comprises a side surface and the pump outlet is in the side surface.

14. The pump of claim 13, wherein the proximal end of the riser tube is an extension piece formed as an elbow and being configured to direct the flow from the output port upwards.

15. The pump of claim 1, wherein the distal end of the riser tube has a raised portion and a front portion that is lower than the raised portion.

16. The pump of claim 15, wherein the raised portion is at a height between:

being even with the bottom of the launder to being 3″

above the bottom of the launder.

17. The pump of claim 1, wherein the launder opening is juxtaposed the first end of the launder.

18. The pump of claim 1 that further comprises a dual-flow rotor.

19. The pump of claim 1, wherein the outlet is at the top surface.

20. The pump of claim 1, wherein the launder has an upward angle of 1°

-10°

versus a horizontal axis.