Sealing valve arrangement for a shaft furnace charging installation

Patent metadata

Field	Value
Publication number	US-11199359-B2
Application number	US-201716349115-A
Country	US
Kind code	B2
Filing date	Nov 8, 2017
Priority date	Nov 10, 2016
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A sealing valve arrangement for a shaft furnace charging installation including a shutter that cooperates with a valve seat and a shutter-actuating device for moving the shutter between a closed position in sealing contact with the valve seat and an open position remote from the valve seat, where the shutter-actuating device includes a tilting shaft connected to the shutter, an electric motor with an output shaft connected to the tilting shaft, and a braking device associated with the electric motor, where the braking device is configured for, when engaged, preventing the output shaft of the electric motor from rotating, the shutter-actuating device further including a transmission means arranged between the output shaft of the electric motor and the tilting shaft, wherein the transmission means is configured for transmitting rotational movement of the output shaft of the electric motor to the tilting shaft, where the transmission means includes a backlash configured for having a predetermined amount of allowed rotation between the output shaft of the electric motor and the tilting shaft.

First claim

The invention claimed is:

1. A sealing valve arrangement for a shaft furnace charging installation, said sealing valve arrangement comprising:
a shutter that cooperates with a valve seat;
a shutter-actuating device for moving said shutter between a closed position in sealing contact with the valve seat and an open position remote from said valve seat;
wherein said shutter-actuating device comprises:
a tilting shaft connected to said shutter;
an electric motor with an output shaft connected to said tilting shaft, said electric motor disposed between a braking device and said tilting shaft;
said braking device associated with said electric motor, said braking device being configured for stopping said output shaft of said electric motor from rotating; and
a transmission means arranged between said output shaft of said electric motor and said tilting shaft, wherein said transmission means comprises a backlash configured for having a predetermined amount of allowed rotation between said output shaft of said electric motor and said tilting shaft, whereby a rotational movement of said tilting shaft is absorbed by the transmission means and not transmitted to said output shaft or to said braking device such that said output shaft is immobilized by said braking device.

2. The sealing valve arrangement according to claim 1 , wherein said predetermined amount of allowed rotation is between 0.1° and 0.5°.

3. The sealing valve arrangement according to claim 1 , wherein said braking device is an electric motor-brake.

4. The sealing valve arrangement according to claim 1 , wherein said predetermined amount of allowed rotation is between 0.25° and 0.35°.

5. The sealing valve arrangement according to claim 1 , wherein the shutter is configured to move when the braking device is engaged and the shutter is in the closed position.

6. The sealing valve arrangement according to claim 1 , wherein an underneath side of said shutter is configured to receive outside pressure such that said shutter is disposed against said valve seat and said tilting shaft is thereby further rotated.

7. The sealing valve arrangement according to claim 1 , wherein said transmission means comprises a gearing mechanism configured to provide the backlash.

8. The sealing valve arrangement according to claim 7 , wherein said transmission means comprises a planetary gear, helical gear or bevel gear.

9. The sealing valve arrangement according to claim 1 , wherein a soft sealing means is arranged between said shutter and said valve seat, wherein said soft sealing means is compressible under high pressure.

10. The sealing valve arrangement according to claim 9 , wherein said soft sealing means is a silicone seal ring.

11. A lower sealing valve housing for a shaft furnace charging installation, said housing comprising
a sealing valve arrangement according to claim 1 , and;
said valve seat supported by said housing and cooperating with said shutter of said sealing valve arrangement.

12. A method for operating a sealing valve of a shaft furnace charging installation, wherein said sealing valve comprises a sealing valve arrangement according to claim 1 , said method comprising:
operating said electric motor connected to said tilting shaft so as to bring said shutter into a sealing contact against said valve seat;
stopping said electric motor and engaging said braking device so as to stop said output shaft of said electric motor from rotating;
applying outside pressure to an underneath side of said shutter so as to further press said shutter against said valve seat, wherein said tilting shaft is thereby further rotated;
wherein said transmission means is configured so as to absorb a further rotation of said tilting shaft without transmitting this further rotation to said output shaft of said electric motor.

Assignees

• Wurth Paul Sa

Inventors

• Steichen Charles
• Hutmacher Patrick
• Tockert Paul

Classifications

• F16K31/043

  characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means · CPC title

• C21B7/20 Primary

  with appliances for distributing the burden · CPC title

• F27D2003/105

  using shutters · CPC title

• F27B1/20 Primary

  Arrangements of devices for charging · CPC title

• F16K1/2007

  specially adapted operating means therefor (operating means per se F16K31/00) · CPC title