Rotary charging device for shaft furnace

Patent metadata

Field	Value
Publication number	US-9546819-B2
Application number	US-201314415888-A
Country	US
Kind code	B2
Filing date	Jul 15, 2013
Priority date	Jul 18, 2012
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A rotary charging device for a shaft furnace comprises a stationary housing ( 16 ) for mounting on the throat ( 12 ) of the shaft furnace and a suspension rotor ( 22 ) supported therein so that it can rotate about a substantially vertical axis (A), said suspension rotor ( 22 ) and stationary housing ( 16 ) cooperating to delimit an annular chamber forming the main casing ( 36 ) of said rotary charging device. A charge distributor ( 28 ) is pivotally suspended to the suspension rotor ( 22 ). The device further comprises: rotary drive means for rotating the suspension rotor ( 22 ) about its axis; independent tilting drive means for pivoting the charge distributor ( 28 ) about a substantially horizontal pivoting axis (B) that include: a tilting motor (M B ) with horizontal output shaft ( 52 ) fixedly mounted relative to the stationary housing ( 16 ); a tilting drive shaft ( 58 ) in the main housing ( 36 ) that is mounted onto the suspension rotor ( 22 ), an outward end ( 60 ) of the tilting drive shaft ( 58 ) being coupled to the tilting motor (M B ) by motion transfer means ( 64 ) while the opposite inward end ( 62 ) of the tilting drive shaft is coupled to the charge distributor ( 28 ) to selectively operate its pivoting, the motion transfer means ( 64 ) being configured in such a way as to allow transmitting power from the tilting motor (M B ) to the tilting drive shaft ( 58 ) at any angular position of the suspension rotor ( 22 ).

First claim

The invention claimed is:

1. A rotary charging device for a shaft furnace comprising:
a stationary housing for mounting on the throat of the shaft furnace;
a suspension rotor supported in said stationary housing so that it can rotate about a substantially vertical axis, said suspension rotor and stationary housing cooperating to delimit an annular chamber forming the main casing of said rotary charging device;
a charge distributor pivotally suspended to said suspension rotor;
rotary drive means for rotating the suspension rotor about its axis;
tilting drive means for pivoting said charge distributor about a substantially horizontal pivoting axis, independently from said rotary drive means, wherein said tilting drive means comprises:
a tilting motor fixedly mounted relative to said stationary housing and laterally positioned relative to said suspension rotor, wherein the tilting motor output shaft is horizontal;
a tilting drive shaft in said main housing that is mounted onto said suspension rotor, an outward, first end of said tilting drive shaft being coupled to said tilting motor by motion transfer means while the opposite, inward second end of said tilting drive shaft is coupled to said charge distributor to selectively operate its pivoting, said motion transfer means being configured for operating peripherally to said suspension rotor in such a way as to allow transmitting power from said tilting motor to said tilting drive shaft at any angular position of said suspension rotor;
wherein said motion transfer means comprise a pair of rotationally integral large diameter toothed rings mounted in said main casing so as to be rotatable about said vertical axis, a first of said toothed rings being drivingly connected to said tilting motor, while the second toothed ring is operatively coupled to said tilting drive shaft first end in such a way that the rotation of said toothed rings results in a corresponding rotation of said tilting drive shaft about its axis.

2. The rotary charging device according to claim 1 , wherein said coupling between said tilting drive shaft and said charge distributor is carried out by an input tilting gear mounted to said tilting drive shaft second end that meshes with an output tilting gear rotationally integral with a suspension arm of said charge distributor.

3. The rotary charging device according to claim 1 , wherein said pair of toothed rings is rotationally supported by an annular rolling bearing.

4. The rotary charging device according to claim 1 , wherein said large diameter toothed rings surround said suspension rotor.

5. The rotary charging device according to claim 1 , wherein said motion transfer means comprise a worm gear set coupling said second toothed ring to said tilting drive shaft.

6. The rotary charging device according to claim 1 , wherein said large diameter toothed rings are arranged in a sub-chamber of said main casing, separate from said suspension rotor and tilting drive shaft.

7. The rotary charging device according to claim 1 , wherein said motion transfer means operate the coupling of said second toothed ring to said tilting drive shaft through an annular slit connecting a sub-chamber containing said toothed rings from a sub-chamber having its inner end delimited by said suspension rotor.

8. The rotary charging device according to claim 1 , comprising a pair of opposite tilting drive shafts mounted on said suspension rotor, each driven by said toothed rings and coupled to a respective suspension arm of said charge distributor.

9. The rotary charging device according to claim 1 , wherein an annular partition wall is rotationally mounted in said main casing and rotationally integral with said suspension rotor; and
said tilting drive shaft traverses said partition wall and has at its first end a gear wheel meshing with one of said toothed rings, while the other toothed ring is connected to said tilting motor to be driven thereby.

10. The rotary charging device according to claim 9 , wherein a further tilting drive shaft mounted on said suspensions rotor opposite the first drive shaft, similarly driven by said toothed rings however connected to the respective suspension arm of said charge distributor by a rotation inverter.

11. The rotary charging device according to claim 1 , wherein said tilting drive shaft has a gear wheel mounted at its first end that meshes with one of said toothed rings.

12. The rotary charging device according to claim 1 , wherein a rotary motor for driving said rotary drive means.

13. The rotary charging device according to claim 1 , wherein said tilting motor and said rotary motor are fixedly mounted to said stationary housing and below an upper flange structure.

14. The rotary charging device according to claim 1 , wherein said suspension rotor comprises a cylindrical body and a bottom flange.

15. The rotary charging device according to claim 1 , wherein said tilting motor and/or said rotary motor is/are installed inside a casing.

16. The rotary charging device according to claim 1 , wherein said stationary housing has upper and lower mounting flanges as well as an external casing extending therebetween.

17. A shaft furnace, in particular a blast furnace, comprising a rotary charging device according to claim 1 .

18. The rotary charging device according to claim 1 , wherein said tilting motor is fixedly mounted to said stationary housing and below an upper flange structure.

Assignees

• Wurth Paul Sa

Inventors

• Thillen Guy
• Thix Christian Benoit
• Hausemer Lionel

Classifications

• F27B1/20 Primary

  Arrangements of devices for charging · CPC title

• F27D3/0033

  charging of particulate material · CPC title

• F27D3/10

  Charging directly from hoppers or shoots · CPC title

• F27D3/0025 Primary

  Charging or loading melting furnaces with material in the solid state · CPC title

• F27D3/00

  Charging; Discharging; Manipulation of charge · CPC title