[특허]Molten metal containment structure having movable cover

Novelis Inc.

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특허 상세정보

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Molten metal containment structure having movable cover

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65D-055/00 B22D-041/01 B22D-041/00
미국특허분류(USC)	266/236; 220/211; 222/597
출원번호	US-0930561 (2011-01-11)
등록번호	US-8883071 (2014-11-11)
발명자 / 주소	Reeves, Eric W.
출원인 / 주소	Novelis Inc.
대리인 / 주소	Kilpatrick Townsend & Stockton LLP
인용정보	피인용 횟수 : 0 인용 특허 : 4

초록
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An exemplary embodiment of the invention provides a molten metal containment structure, including a vessel having an internal volume for containing molten metal and an open upper end. The structure further includes a cover for the vessel having an underside facing the internal volume, the cover being movable between a closed position, covering the open upper end of the vessel with the underside of the cover, and an open position in which the cover is remote from the open upper end of the vessel to allow access to the internal volume from one side of the structure. The cover is attached to at least one lifting arm (preferably two or more) and at least on rotation control arm (preferably two or more). The lifting arm(s) operates to guide the cover from the open position to the closed position, and vice versa. The rotation control arm(s) operates to control pivoting of the cover during movement from the closed position to the open position, and vice versa, to prevent exposure of the underside of the cover, which in operation is very hot, to a person positioned adjacent to the structure at the aforesaid one side thereof. The lifting arm(s) and/or rotation control arm(s) provide a force that at least partially counterbalances a weight of the cover.

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1. A molten metal containment structure, comprising: a vessel having an internal volume for containing molten metal and an open upper end; anda cover for the vessel having an underside facing said internal volume, said cover being movable between a closed position, covering said open upper end of the vessel with the underside of the cover, and an open position in which said cover is remote from said open upper end of the vessel to allow access to the internal volume from one side of the structure;wherein said cover is attached to at least one elongated lifting arm and at least one elongated rotation control arm, wherein the at least one elongated lifting arm and the at least one elongated rotation control arm are attached to the vessel;wherein the at least one lifting arm is configured to rotate along a first path to guide the cover from said closed position to said open position, and vice versa, andwherein the at least one rotation control arm is configured to rotate along a second path that is substantially parallel to the first path to control pivoting of the cover from a generally horizontal position during movement from said open position to said closed position, and vice versa, to prevent exposure of said underside of the cover to a person positioned adjacent to the structure at said one side, andwherein said at least one lifting arm or said at least one rotation control arm provides a force that at least partially counterbalances a weight of the cover. 2. The structure of claim 1, wherein said at least one lifting arm has a counterweight attached thereto providing said force. 3. The structure of claim 1, wherein said at least one lifting arm has a spring attached thereto providing said force. 4. The structure of claim 1, wherein said at least one lifting arm is pivotally attached to said vessel at a vertical height below a vertical height of said open upper end of the vessel. 5. The structure of claim 1, wherein said underside of the cover is provided with a heater for heating said internal volume when said cover is in the closed position. 6. The structure of claim 1, wherein said underside of the cover is provided solely with a layer of refractory insulating material facing said internal volume. 7. The structure of claim 1, having at least two lifting arms and at least two rotation control arms, said lifting arms being mutually spaced apart along the cover, and said rotation control arms being mutually spaced apart along the cover. 8. The structure of claim 7, wherein each lifting arm is positioned immediately adjacent to a rotation control arm, and vice versa, whereby said arms provide mutual physical support during movement of the cover. 9. The structure of claim 1, wherein said at least one lifting arm has a C-shaped portion to accommodate movement of the cover from the closed position to the open position. 10. The structure of claim 1, wherein said at least one rotation control arm has a C-shaped portion to accommodate movement of the cover from the closed position to the open position. 11. The structure of claim 1, wherein said cover is provided with a manually graspable region adjacent to said one side. 12. The structure of claim 11, wherein the manually graspable region is a handle attached to the cover. 13. The structure of claim 1, including a powered device for moving said cover from said closed position to said open position, and vice versa. 14. The structure of claim 13, wherein said device includes a piston and cylinder acting between said at least one lifting arm and said casing. 15. The structure of claim 13, wherein said device includes a remotely operable control, said control being operable to control movement of said cover. 16. The structure of claim 1, wherein said vessel is made of a refractory material that is resistant to attack by molten metal. 17. The structure of claim 1, wherein said at least one rotation control arm prevents said cover from rotating at said underside from the generally horizontal position by more than approximately 25° towards said one side. 18. The structure of claim 1, wherein said at least one rotation control arm causes said cover to rotate at said underside from the generally horizontal position in a direction facing away from said one side. 19. The structure of claim 1, wherein said vessel is an elongated trough for conveying molten metal, said trough having an inlet for molten metal at one end of the structure and an outlet for molten metal at an opposite end of the structure. 20. The structure of claim 1, wherein said vessel includes an outer metal casing. 21. The structure of claim 20, wherein said arms are pivotally attached to a sidewall of said metal casing opposite to said one side of the structure. 22. The structure of claim 1, wherein a rotation axis of said at least one rotation control arm is substantially parallel to a rotation axis of said at least one lifting arm. 23. A molten metal containment structure, comprising: a vessel having an internal volume for containing molten metal and an open upper end; anda cover for the vessel having an underside facing said internal volume, said cover being movable between a closed position, covering said open upper end of the vessel with the underside of the cover, and an open position in which said cover is remote from said open upper end of the vessel to allow access to the internal volume from one side of the structure;wherein said cover is attached to at least one elongated lifting arm and at least one elongated rotation control arm, the at least one lifting arm operating to guide the cover from said closed position to said open position, and vice versa, and the at least one rotation control arm operating to control pivoting of the cover during movement from said open position to said closed position, and vice versa, to prevent exposure of said underside of the cover to a person positioned adjacent to the structure at said one side, and wherein said at least one lifting arm or said at least one rotation control arm provides a force that at least partially counterbalances weight of the cover,wherein said at least one lifting arm is attached to said vessel via a pivot having a center in a vertical plane, and wherein said cover and directly attached parts of said arms have a center of gravity that is positioned on one side of said vertical plane when in the closed position and the other side of said plane when in the open position. 24. A molten metal containment structure, comprising: a vessel having an internal volume for containing molten metal and an open upper end; anda cover for the vessel having an underside facing the internal volume, said cover being movable between a closed position, covering the open upper end of the vessel with the underside of the cover, and an open position in which the cover is remote from the open upper end of the vessel to allow access to the internal volume from one side of the structure;wherein the cover is directly attached to at least one elongated lifting arm and is directly attached to at least one elongated rotation control arm and wherein the at least one elongated lifting arm and the at least one elongated rotation control arm are attached to the vessel,wherein the at least one lifting arm is configured to guide the cover from the closed position to the open position, and vice versa, andwherein the at least one rotation control arm is configured to rotate in conjunction with the at least one lifting arm in a way that controls pivoting of the cover during movement from the open position to the closed position, and vice versa, so as to limit exposure of the underside of the cover to a person positioned adjacent to the structure at the one side, andwherein the at least one lifting arm or the at least one rotation control arm provides a force that at least partially counterbalances a weight of the cover. 25. The structure of claim 24, wherein said at least one lifting arm and said at least one rotation control arm are offset from one another along said cover. 26. A molten metal containment structure, comprising: a vessel having an internal volume for containing molten metal and an open upper end; anda cover for the vessel having an underside facing the internal volume, said cover being movable between a closed position, covering the open upper end of the vessel with the underside of the cover, and an open position in which the cover is remote from the open upper end of the vessel to allow access to the internal volume from one side of the structure;wherein the cover is attached to at least one elongated lifting arm and at least one elongated rotation control arm and wherein the at least one elongated lifting arm and the at least one elongated rotation control arm are attached to the vessel,wherein the at least one lifting arm is configured to guide the cover from the closed position to the open position, and vice versa, andwherein the at least one rotation control arm is configured to rotate in conjunction with the at least one lifting arm in a way that controls pivoting of the cover during movement from the open position to the closed position, and vice versa, to prevent the cover from rotating from a generally horizontal position by more than approximately 30° so as to limit exposure of the underside of the cover to a person positioned adjacent to the structure at the one side, andwherein the at least one lifting arm or the at least one rotation control arm provides a force that at least partially counterbalances a weight of the cover.

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Molten metal containment structure having movable cover

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Molten metal containment structure having movable cover

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