SHUT-OFF SYSTEM FOR LARGE CONDUIT CROSS-SECTIONS, HAVING A SWING FLAP

• US 20080245431A1
• Filed: 04/02/2008
• Published: 10/09/2008
• Est. Priority Date: 04/05/2007
• Status: Active Grant

• Current Assignee: Janich GmbH & Co. KG
• Original Assignee: Janich GmbH & Co. KG
• Inventors: Janich, Hans-Jurgen, Kruger, Matthias
• Granted Patent: US 8,091,858 B2
• Time in Patent Office: Days
• US Class Current: 137/875
• CPC Class Codes: F16K 11/052 with pivoted closure members, e.g. butterfly valves
• CPC Class Codes: F16K 31/521 comprising a pivoted disc or flap
• CPC Class Codes: F23L 11/00 Arrangements of valves or dampers after the fire
• CPC Class Codes: Y10T 137/87812 Pivoted valve or deflector

Abstract

The shut-off system according to the invention for large conduit cross-sections has a swing flap which can be swung to and fro between two end positions about a pivot axis by means of a drive device, wherein the drive device has a drive shaft which is connected to the swing flap via an elbow lever, and at least one lever arm rigidly connected to the drive shaft is provided which is in operative connection with at least one operating cylinder for rotation of the drive shaft. The drive device has a motion link which is fastened so as to be rotatable about a pivot bearing, wherein the operating cylinder is connected to the motion link to pivot the same, and a transmission element is provided between the lever arm and the motion link in order to transmit the pivoting motion of the motion link to the drive shaft.

Claims

1. A shut-off system for large conduit cross-sections, having a swing flap (2) which can be swung to and fro between two end positions about a pivot axis (2a) by means of a drive device, wherein the drive device has a drive shaft (3) which is connected to the swing flap (2) via an elbow lever system (4), and at least one lever arm (8) rigidly connected to the drive shaft is provided which is in operative connection with at least one operating cylinder (12) for rotation of the drive shaft (3),

characterised in that the drive device has a motion link (9) which is fastened so as to be rotatable about a pivot bearing, and the operating cylinder (12) is connected to the motion link (9) to pivot the same, and a transmission element (11, 15) is provided between the lever arm (8) and the motion link in order to transmit the pivoting motion of the motion link to the drive shaft (3).

2. A shut-off system according to claim 1, characterised in that the drive device is so constructed that the rotational movement of the drive shaft between the two end positions of the swing flap (2) is at least 160°

, especially between 160° and

180°

.

3. A shut-off system according to claim 1, characterised in that the swing flap (2) executes a pivoting movement between the two end positions of approximately 90°

.

4. A shut-off system according to claim 1, characterised in that the motion link (9) is supported by its one end to be rotatable about the pivot bearing (10) and is connected by its other end to the lever arm (8) via the transmission element (11, 15), and the operating cylinder (12) is coupled to a central region of the motion link (9).

5. A shut-off system according to claim 1, characterised in that the distance (a) between the pivot axis (2a) of the swing flap (2) and the rotation axis of the drive shaft (3) is in the range of from 0.3 to 0.7, preferably from 0.4 to 0.6, times the width (b) of the swing flap (2).

6. A shut-off system according to claim 1, characterised in that the transmission element (11) is formed by a linkage rod.

7. A shut-off system according to claim 1, characterised in that the pivot bearing (10) is constructed to be stationary.

8. A shut-off system according to claim 1, characterised in that the pivot bearing (10) is constructed to be longitudinally displaceable.

9. A shut-off system according to claim 8, characterised in that the motion link (9) further has a stop (18) which limits the pivoting movement of the motion link (9) and, as the stroke of the operating cylinder (12) continues, causes displacement of the motion link.

10. A shut-off system according to claim 1, characterised in that the transmission element (11) is formed by a second operating cylinder (15) in order to increase the turning range of the drive shaft (3).

11. A shut-off system according to claim 1, characterised in that the rotational axes of the motion link (2) and the drive shaft (3) coincide.

12. A shut-off system according to claim 6, characterised in that the first operating cylinder (12) has a greater effective piston diameter than the second operating cylinder (15) and the two operating cylinders are arranged parallel to each other.

13. A shut-off system according to claim 9, characterised in that the two operating cylinders (12, 15) are connected to each other in such a manner that both of them are always acted upon simultaneously by the same pressure.

14. A shut-off system according to claim 1, characterised in that the operating cylinder (12) is connected by its one end to the motion link (9) and is supported by its other end on a mounting bracket (13), wherein the mounting bracket is in turn held so as to be rotatable at its one end and is supported at its other end on a housing frame.