Fire door and a fire protection system

• US 20030115804A1
• Filed: 10/23/2002
• Published: 06/26/2003
• Est. Priority Date: 03/15/2000
• Status: Active Grant

• Current Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Original Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Inventors: Sundolm, Goran
• Granted Patent: US 6,779,309 B2
• Time in Patent Office: Days
• US Class Current: 49/334
• CPC Class Codes: A62C 2/241 having mechanical actuators and heat sensitive parts

Abstract

The invention relates to a hydraulic fire door, especially a sliding door, which can be selectively opened or closed, and the fire door being provided with an actuator (3) for moving said door from an opened position to a closed position. In order to ensure a particularly fire resistant fire door without the heat resistance of the basic structure thereof having to be particularly good, the actuator (3) is arranged to supply aqueous liquid to the fire door in order to cool it using the aqueous liquid. The invention also relates to a fire protection system.

Claims

1. A hydraulic fire door, especially a sliding door, which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′

) for moving the door from an opened position to a closed position, wherein the actuator (3, 3′

) is arranged to supply aqueous liquid to the fire door in order to cool it using the aqueous liquid.

2. A fire door as claimed in claim 1, wherein the actuator is arranged to supply aqueous liquid onto a facing surface of the fire door.

3. A fire door as claimed in claim 1, wherein the actuator (3, 3′

) is arranged to supply said liquid through a feeding channel (6, 6′

) to the upper part of the fire door.

4. A fire door as claimed in claim 3, wherein the feeding channel (6, 6′

) comprises a set of spray openings (7, 7′

) arranged at the upper part of the fire door for supplying said liquid onto the facing surface of the fire door.

5. A fire door as claimed in claim 3 or 4, wherein the feeding channel (6, 6′

) comprises an opening valve (8, 8′

) for opening the fire door when it is in the closed position.

6. A fire door as claimed in claim 5, wherein the opening valve (8, 8′

) is functionally connected to an actuating means (9, 9′

) arranged for opening the fire door in order to close the opening valve using the actuating means for opening the closed fire door.

7. A fire door as claimed in claim 6, wherein the actuating means is a mechanical device (9) arranged centrally of the door.

8. A fire door as claimed in claim 6, wherein the actuating means comprises an at least partly electrical device (9′

).

9. A fire door as claimed in claim 6, wherein the opening valve (8′

) comprises a solenoid (130′

) for opening the opening valve and for closing the fire door from the opened position.

10. A fire door as claimed in claim 6, wherein the opening valve (8′

) comprises a thermal trigger means (120′

) for opening the opening valve and for closing the opened fire door.

11. A fire door as claimed in claim 1, wherein the actuator (3, 3′

) is connected to a line (4, 4′

) leading to spray heads (10, 10′

) in a fire extinguishing system.

12. A fire door as claimed in claim 11, wherein a throttle valve (11, 11′

) is arranged between the line (4, 4′

) and the actuator (3, 3′

).

13. A fire door as claimed in claim 12, wherein the throttle valve (11) comprises a solenoid (13) for closing the throttle valve and for opening the fire door from the closed position.

14. A fire door as claimed in claim 12, wherein the throttle valve (11) comprises a thermal trigger means (12) for opening the fire door and for closing the opened fire door.

15. A fire door as claimed in claim 1, wherein the fire door is made of glass.

16. A fire door as claimed in claim 15, wherein the fire door is a glass door comprising spaced glass surfaces (14a, 14b, 14a′

, 14b′

) and in that the feeding channel (6, 6′

) is arranged to supply said liquid into a space (15, 15′

) between the glassed surfaces.

17. A fire door as claimed in claim 16, wherein the fire door comprises a passage (60, 60′

), whose volume is small compared to the volume of the space (15, 15′

) between the glass surfaces (14a, 14b, 14a′

, 14b′

), the passage being a part of said feeding channel (6, 6′

).

18. A fire door as claimed in claim 17, wherein the passage (60, 60′

) is formed inside a frame of the door.

19. A fire door as claimed in claim 17, wherein a lower part of the fire door comprises at least one liquid outlet opening (16, 16′

).

20. A fire door as claimed in claim 19, wherein an upper part of the fire door comprises an overflow opening (17) for emptying the liquid into the lower part of the fire door.

21. A fire door as claimed in claim 1, wherein the actuator is a piston cylinder unit (3, 3′

) comprising a piston (1, 1′

) and a cylinder (2, 2′

).

22. A fire door as claimed in claim 21, wherein the piston (1, 1′

) of the piston cylinder unit (3, 3′

) comprises a free end (18, 18′

) and an end (19, 19′

) arranged opposite to the free end, said end (19, 19′

) being connected to a piston rod (20, 20′

) that is surrounded by a liquid tight wall of an opening (21, 21′

) in the cylinder, and in that the piston rod and the piston comprise a through passage (22, 22′

) for supplying said liquid through the piston rod into a first space (23, 23′

) between the cylinder (2, 2′

) and the free end of the piston and in that the piston rod comprises a channel (24, 24′

) that leads to a second space (25, 25′

) defined by the piston rod, the piston end (19, 19′

) pointing towards the piston rod, the cylinder portion surrounding the piston rod and an end (62, 62′

) at the cylinder opening (21, 21′

).

23. A fire door as claimed in claim 22, wherein the flow resistance of the passage (22, 22′

) leading to the first space (23, 23′

) through the piston (1, 1′

) exceeds the flow resistance of the channel (24, 24′

) leading to the second space (25, 25′

).

24. A fire protection system comprising a fire extinguishing system and a hydraulic fire door, especially a sliding door, which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′

) for moving the fire door from an opened position to a closed position, wherein the actuator (3, 3′

) is arranged to feed aqueous liquid to the fire door in order to cool it using the aqueous liquid.

25. A fire protection system as claimed in claim 24, wherein the actuator is arranged to supply aqueous liquid onto a facing surface of the fire door.

26. A fire protection system as claimed in claim 24 or 25, wherein the actuator (3, 3′

) is connected to a line (4, 4′

) of a fire extinguishing system for feeding said liquid through an output (5, 5′

) starting from the actuator (3, 3′

) and a feeding channel (6, 6′

) to the upper part of the fire door.

27. A fire protection system as claimed in claim 26, wherein the line is a feeding line (4, 4′

) leading to spray heads (10, 10′

) in the fire extinguishing system.

28. A fire protection system as claimed in claim 25, wherein the actuator is a piston cylinder unit (3, 3′

) comprising a piston (1, 1′

) and a cylinder (2, 2′

).