Water spray valve set for a fire extinguishing system, and fire extinguishing system

Abstract

The present invention relates to a water spray valve set for a nozzle pipe system of a fire-extinguishing installation, having a water spray valve which has a fluid inlet for connection to a water supply, a fluid outlet for connection to the nozzle pipe system, and a closing body arranged between fluid inlet and fluid outlet, wherein the closing body is movable back and forth between a shut-off position and an opened-up position, wherein, in the shut-off position, the fluid inlet and fluid outlet are separated from one another and, in an opened-up position, said fluid inlet and fluid outlet are fluidically connected to one another, having a control line which is connected to a control pressure supply, and having at least one first control valve for controlling the control pressure in the control line, wherein the control line is operatively connected to the closing body such that the closing body is held in the shut-off position, or is in an opened-up position, in a manner dependent on an actuation of the control valve. According to the invention, a relief line is provided which is connected to the control valve, wherein the control valve is designed to, when activated, relieve the control line of pressure via the relief line, such that the closing body is moved into the opened-up position, and to shut off the fluid connection between the control pressure supply and the closing body.

Claims

1. A water spray valve set for a nozzle pipe system of a fire-extinguishing installation, comprising: a water spray valve which has a fluid inlet for connection to a water supply, a fluid outlet for connection to the nozzle pipe system, and a closing body arranged between the fluid inlet and the fluid outlet, wherein the closing body is movable back and forth between a shut-off position and an opened-up position, wherein, in the shut-off position, the fluid inlet and fluid outlet are separated from one another and, in the opened-up position, said fluid inlet and fluid outlet are fluidically connected to one another, a control line which is connected to a control pressure supply, at least one control valve for controlling the control pressure in the control line, wherein the control line is operatively connected to the closing body such that the closing body is held in the shut-off position, or is in the opened-up position, in a manner dependent on an actuation of the at least one control valve, and a relief line connected to the at least one control valve, wherein the at least one control valve, when activated, relieves the control line of pressure via the relief line, such that the closing body is moved into the opened-up position, and shuts off fluid connection between the control pressure supply and the closing body, wherein the at least one control valve comprises a first control valve and a second control valve, and wherein the first control valve, the second control valve, and a chamber of the water spray valve are connected in series by the control line.

2. The water spray valve set as claimed in claim 1, wherein the control line is connected at an inlet side via a control supply line to the fluid inlet of the water spray valve or a water supply.

3. The water spray valve set as claimed in claim 2, wherein a check valve is arranged in the control supply line.

4. The water spray valve set as claimed in claim 3, wherein a filter device is arranged in the control supply line.

5. The water spray valve set as claimed in claim 2, wherein, in the control supply line, there is arranged a restrictor which influences a flow speed of fluid within the control line.

6. The water spray valve set as claimed in claim 1, wherein the first control valve is an electrically activatable control valve connected to the relief line and is connectable for signal transmission to a fire detector and/or extinguishing control station.

7. The water spray valve set as claimed in claim 6, wherein the electrically activatable first control valve is a solenoid valve, wherein the solenoid valve is one of a 3/2-way solenoid valve and a bistable solenoid valve.

8. The water spray valve set as claimed in claim 6, wherein the second control valve comprises a manually actuatable second control valve to which a further relief line (44, 44′) is connected.

9. The water spray valve set as claimed in claim 8, wherein the manually actuatable second control valve is arranged in the control line downstream of the electrically activatable first control valve.

10. The water spray valve set as claimed in claim 8, wherein the manually actuatable second control valve is a ball valve.

11. The water spray valve set as claimed in claim 8, wherein each of the relief line and the further relief line comprises one or more restrictors which influence a flow speed of fluid in the relief line and the further relief line.

12. The water spray valve set as claimed in claim 8, wherein the relief line and the further relief line are merged to form a common relief manifold line with exactly one restrictor.

13. The water spray valve set as claimed in claim 5, wherein the restrictor is variably adjustable.

14. The water spray valve set as claimed in claim 1, wherein the closing body has a restoring element which is coupled to the closing body and which is designed to force the closing body in the direction of the shut-off position.

15. The water spray valve set as claimed in claim 1, wherein the closing body has a spring-loaded valve disk or a valve diaphragm.

16. The water spray valve set as claimed in claim 1, further comprising a discharge line with a discharge valve for the evacuation of the nozzle pipe system, wherein the discharge line is connected at an inlet side to the fluid outlet of the water spray valve or to the nozzle pipe system.

17. The water spray valve set as claimed in claim 16, wherein the discharge valve is manually actuatable or is connectable for signal transmission to a fire detector and/or extinguishing control station.

18. A fire-extinguishing installation comprising: a nozzle pipe system, and a water spray valve set which is connected via one or more fluid lines to the nozzle pipe system, wherein the water spray valve set is designed as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Below, the invention will be described in more detail on the basis of preferred exemplary embodiments and with reference to the appended figures, in which:

(2) FIG. 1 is a schematic illustration of a fire-extinguishing installation according to the invention with a first exemplary embodiment of a water spray valve set, and

(3) FIG. 2 is a schematic illustration of a fire-extinguishing installation according to the invention with a second exemplary embodiment of a water spray valve set.

MODE(S) FOR CARRYING OUT THE INVENTION

(4) FIG. 1 schematically shows a fire-extinguishing installation 1 having a water spray valve set 2 which is connected at an inlet side to a water supply 4. Furthermore, the water spray valve set 2 is connected at an outlet side to a nozzle pipe system 6. The nozzle pipe system 6 has a multiplicity of sprinkler nozzles 8. The inflow and outflow of water to and from the water spray valve set 2 is controlled by means of separate shut-off fittings 10, 10′ arranged upstream and downstream of the water spray valve set 2.

(5) The water spray valve set 2 comprises a water spray valve 12 with a fluid inlet 14 and a fluid outlet 16. The fluid inlet 14 is connected to the water supply 4, and the fluid outlet 16 is connected to the nozzle pipe system 6. Furthermore, the water spray valve 12 has a closing body 18 which is movable back and forth between a shut-off position (not illustrated in any more detail) and an opened-up position. The actuation of the closing body 18 is performed by means of an actuating element 19′ arranged in a diaphragm chamber 19. Furthermore, the water spray valve 12 has a control line 20, wherein, in a manner dependent on the control of a control pressure in the control line 20, a force is exerted on the actuating element 19′, whereby the closing body is either held in the shut-off position or is moved into the opened-up position. In the shut-off position of the closing body, the fluidic connection between the fluid inlet 14 and the fluid outlet 16 is interrupted. If the closing body 18 is situated in its opened-up position, the throughflow of the extinguishing agent from the fluid inlet to the fluid outlet of the water spray valve 2 is ensured.

(6) In the embodiment shown in FIG. 1, the control line 20 is connected at the inlet side via a control supply line 22 to the fluid inlet 14 of the water spray valve 2. In an alternative embodiment which is not shown, the control supply line 22 is connected to the water supply 4 or to a separate control pressure source (not shown in any more detail). Furthermore, the water spray valve set 2 comprises a control valve 24, which connects the control supply line 22 and the control line 20 to one another. The control line 20 is connected to the port 24.1, and the control supply line 22 is connected to the port 24.2. During the normal operation of the fire-extinguishing installation 1, the control line 20 is fluidically connected via the control supply line 22 to the water supply 4, whereby a control pressure of predetermined intensity prevails in the diaphragm chamber 19, which control pressure acts on the actuating element 19′ of the closing body 18 and holds the latter in its shut-off position. In the embodiment shown here, the actuating element 19′ is additionally acted on by a restoring element 25 which forces the closing body 18 in the direction of the shut-off position and which is in the form of a pressure spring. In the control supply line 22, there are furthermore arranged a filter device 26, a restrictor 28 and a check valve 30.

(7) Furthermore, a relief line 32 is connected to the port 24.3 of the control valve 24. In the embodiment shown, the control valve 24 is an electrically activatable control valve which is connectable in signal-transmitting fashion via a signal line 34 to a fire detector and/or extinguishing control station 36. If a fire situation is triggered by one or more fire detectors 38, then the control valve 24 is activated by means of the fire detector and/or extinguishing control station 36 such that the fluidic connection between the ports 24.1 and 24.2 is shut off and the connection between the ports 24.1 and 24.3 is opened. In this way, the control line 20 is relieved of pressure through the fluidic connection to the relief line 32, such that the control pressure in the diaphragm chamber 19 at least briefly falls. This has the result that the closing body 18 of the water spray valve 12 moves from its shut-off position into an opened-up position. Furthermore, the fluid flow from the fluid inlet 14 to the fluid outlet 16 of the water spray valve 12 and in the direction of the nozzle pipe network 6 is enabled. To control the relief of pressure in the control line in targeted fashion, a restrictor 40 is arranged in the relief line.

(8) In addition to the control valve 24, a further control valve 42, which is in the form of a manually actuatable control valve, is arranged in the control line 20. The control line 20 is connected to the ports 42.2 and 42.3 of the control valve 42. A further relief line 44 is connected to the port 42.1 of the control valve 42. In the case of manual actuation of the control valve 42, the fluidic connection between the ports 42.2 and 42.3 of the control valve 42 is shut off, and the fluidic connection between the ports 42.1 and 42.2 of the control valve 42 is produced. In this way, the portion of the control line 20 between the control valve 42 and the closing body 18 is relieved of pressure via the relief line 44. The two control valves 24, 42 are designed to each relieve the control line 20, or a portion thereof, of pressure when the control valve 24 is electrically activated or the control valve 42 is manually actuated. Furthermore, a situation is prevented in which the control medium, in the example shown in FIG. 1 water from the water supply 4, flows into the control line 20 continuously. The additional relief line 44 is also equipped with a restrictor 40, whereby the relief of pressure in the control line 20 is adjustable in targeted fashion, and thus the opening speed of the water spray valve 12 can be influenced.

(9) Furthermore, a discharge line 46 with a discharge valve 48 arranged in the discharge line is provided for the evacuation of the nozzle pipe system 6, wherein the discharge line 46 is, in the embodiment shown, connected to the fluid inlet 16 of the water spray valve 12.

(10) FIG. 2 shows a further exemplary embodiment of a water spray valve set 2′ according to the invention, which is of almost identical design to the embodiment of the water spray valve set 2 shown in FIG. 1. By contrast to the water spray valve set 2, the water spray valve set 2′ has two relief lines 32′, 44′, which merge at a junction 50 to form a common relief manifold line 52.

(11) Furthermore, in the second embodiment of the water spray valve set 2′ according to the invention, only exactly one restrictor 40 is arranged in the relief manifold line 52. The relief of pressure in the control line 20 and in the water spray valve 12 connected thereto is then always controlled, irrespective of an activation of the control valve 24 or a manual actuation of the control valve 40, by means of the only one restrictor 40 in the relief manifold line 52. Also, in the embodiment of the water spray valve set 2′ shown in FIG. 2, a discharge line 46 connected to the fluid outlet is connected to a discharge valve 48′. By contrast to the embodiment shown in FIG. 1, the discharge valve 48′ is activated in signal-transmitting fashion by means of the fire detector and/or extinguishing control station 36 via a signal line 54. In an alternative embodiment, the discharge line 46 may be connected to a portion of the nozzle pipe system 6.

LIST OF UTILIZED REFERENCE NUMBERS

(12) 1 Fire-extinguishing installation 2, 2′ Water spray valve set 4 Water supply 6 Nozzle pipe system 8 Sprinkler nozzles 10, 10′ Shut-off fitting 12 Water spray valve 14 Fluid inlet 16 Fluid outlet 18 Closing body 19 Diaphragm chamber 19′ Actuating element 20 Control line 22 Control supply line 24 Control valve 24.1, 24.2, 24.3 Port 25 Restoring element 26 Filter device 28 Restrictor 30 Check valve 32, 32′ Relief line 34 Signal line 36 Fire detector and/or extinguishing control station 38 Fire detector 40 Restrictor 42 Control valve 42.1, 42.2, 42.3 Port 44, 44′ Relief line 46 Discharge line 48,48′ Discharge valve 50 Junction 52 Relief manifold line 54 Signal line