Molten metal pump support post and apparatus for removing it from a base

• US 5,558,505 A
• Filed: 08/09/1994
• Issued: 09/24/1996
• Est. Priority Date: 08/09/1994
• Status: Expired due to Fees

• Current Assignee: Metaullics Systems Company LP (Pyrotek Incorporated)
• Original Assignee: Metaullics Systems Company LP (Pyrotek Incorporated)
• Inventors: Henderson, Richard S., Gilbert, Ronald E., Mordue, George S., Masarin, David M.
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US08/287,914
• Time in Patent Office: 777 Days
• Field of Search: 417/360, 266/236, 266/239, 222/591, 222/596, 415/200, 415/213.1, 403/266, 403/267, 403/268
• US Class Current: 417/360
• CPC Class Codes: F04D 29/628 especially adapted for liquid pumps
• CPC Class Codes: F04D 7/065 for liquid metal

Abstract

A post for a molten metal pump having an end joined to a hole in a pump base. The post end includes a longitudinal bore opening at the end of the post and a port opening to the side of the post intersecting the bore. A plug is inserted into the bore above the level of the port yet leaving a portion of the upper bore open. Cement can be injected into the bore and out the ports. Thereafter, a second plug can be inserted into the bore to drive cement out. To remove the post, it is cut across its longitudinal axis to expose the open upper portion of the bore. The opening is a pilot hole to drill a longitudinal hole in the post. A device having two members connected by a rod are attached to the upper and lower surfaces of the remaining post, respectively and tightened to break the cement joint.

Claims

1. An apparatus for removing a molten metal pump post comprising a cup-like member sized to fit over a section of a molten metal pump post and a base member, a rod mating said cup-like member with said base member wherein at least one of a first or second end of said rod is coupled with at least one of said members in a manner which allows urging said members together.

2. The apparatus of claim 1 wherein said base member is cup-like.

3. The apparatus of claim 1 wherein said rod is at least partially threaded and coupled to said member with a nut.

4. The apparatus of claim 1 wherein said rod is at least partially threaded and attached to said member with a nut.

5. The apparatus of claim 1 wherein said rod is attached to said member with a weld.

6. The apparatus of claim 1 wherein both said base member and said cup-like member are generally cylindrical, each having one open en and one closed end.

7. The apparatus of claim 1 wherein said base member has a dimension on an axis perpendicular to said rod which is less than a cross-section of said post taken along a longitudinal axis of said post.

8. The apparatus of claim 1 wherein at least one of said cup-like member and said base member includes a hole through which at least one end of said rod extends, said at least one end of said rod being threaded and including a nut attached to said threaded end which allows the members to be drawn together.

10. The post of claim 8 wherein a portion of said bore extends longitudinally toward said second end of said post a distance beyond the point of intersection with said at least one port.

11. The post of claim 8 having a cylindrical shape.

12. The post of claim 8 comprised of graphite.

13. The post of claim 10, wherein said section of said bore extending a distance beyond said point of intersection with said port has a reduced diameter.

14. The post of claim 8 wherein said bore is generally axially aligned with said post.

15. The post of claim 8 wherein two ports intersect with said bore.

16. The post of claim 8 comprised of a ceramic material.

9. A molten metal pump post comprising an elongated body of a refractory material having opposite ends, a first end having a generally longitudinal bore opening at said first end, at least one tangential port intersecting said longitudinal bore and opening at a side of said elongated body, said bore including a section extending a distance beyond said point of intersection with said port, said bore and port sized to accommodate passage of adhesive from said opening in said first end to said side of said post.

17. A method of removing a post adhesively secured to the base of a molten metal pump, said base having at least one hole which mates with a bottom portion of said post, the method comprising cutting said post perpendicular to its longitudinal axis to expose a pilot hole in said bottom portion, using said pilot hole to drill a bore through said bottom portion of said post, inserting a rod through said bore, placing a first member over said post, said member overlapping said post and contacting a surface of said base, placing a second member over an opposite end of said post, said second member sized smaller than said hole in said base, the rod passing through each member, securing said members to the rod, and urging said members together to break said adhesive and remove said post from said hole.

18. A molten metal pump post comprising an elongated body of a refractory material having opposite ends, a first end having a generally longitudinal bore opening at said first end and a plug sized to mate with said bore, at least one tangential port intersecting said longitudinal bore and opening at a side of said elongated body, said bore and port sized to accommodate passage of adhesive from said opening in said first end to said side of said post.

19. A method of removing a post adhesively secured to the base of a molten metal pump, said base having at least one hole which mates with a bottom portion of said post, the method comprising cutting said post perpendicular to its longitudinal axis, drilling a bore through said bottom portion of said post, inserting a rod through said bore, placing a first member over said post, said member overlapping said post and contacting a surface of said base, placing a second member over an opposite end of said post, securing said members to the rod, and urging said members together to break said adhesive and remove said post from said hole.