DE9410189U1 - Nozzle unit - Google Patents

Description

1859GM '■ Nozzle unit

The invention relates to a nozzle unit for spray mist for liquid extinguishing agents, in particular water. Spray mist is defined as a droplet size distribution in the range up to 200 µm.

Such nozzle units consist of a base body with openings for accommodating nozzles and swirl bodies as well as for connecting to supply lines for extinguishing agents and, if necessary, for the ampoule cage.

The task of the nozzle unit is to ensure that the droplet jets produced by the individual nozzles are distributed as evenly as possible.

To solve this problem, the base body is preferably designed to be rotationally symmetrical. The ampoule cage is arranged in the axis of rotation if necessary. The nozzles or swirl bodies or their axes of symmetry are located on a conical surface around the axis of rotation. If the nozzles are arranged rotationally symmetrically on the conical surface, an angle of F = 360°/N results between the nozzles, depending on the number of nozzles N. For an arrangement with five nozzles, an angle range of 20 to 60° for half the conical angle (K) is preferred.

For more than three nozzles, the half cone angle K = 0.75 x (90 - F/2) should be given according to the invention. This achieves an optimal distribution of the droplet jets on the surface to be erased. For four to six nozzles, the angles between the axis of symmetry of the base body and the nozzle axis are given in the following table.

· ■ &igr;

Number
the nozzles Angle F Symmetry
sen the nozzles under
each other Angle K between Dü
sen axis and symmetry
trie axis of the base
body 4 90
72
60 33.8
40.5
45.0 5 6

An arrangement with five nozzles is preferred, and thus an angle between the axis of symmetry of the base body and the nozzle axis of about 40°.

In a further preferred embodiment, the base body has, in addition to the main supply line for extinguishing agent, a connection for an ampoule cage or other triggering element. The nozzle unit then represents a fully functional sprinkler. In this combination of nozzle units and sprinkler, the triggering of the sprinkler also causes the discharge of extinguishing agent to the other connected nozzle units (master-slave arrangement), whereby the sprinkler also has a connection for passing on extinguishing agents to the nozzle units.

The invention is explained in more detail using an embodiment.

The only attached illustration, Figure 1, shows a cross-section through a nozzle unit designed as a sprinkler.

Figure 1 shows a sprinkler that has a base body 3. The cage 1, which carries the ampoule 2, is connected to the base body 3. The base body 3 has a closure 4 into which the piston 5 extends, supported by the ampoule 2. The

The inlet opening 41 of the closure 4 is closed off from the nozzles 9 by the ampoule 2, piston 5 and sealing ring 6. If the ampoule 2 bursts, the piston 5 moves in the direction of the arrow 52. Under the pressure of the extinguishing agent of 100 to 200 bar, the piston 5 moves into the position shown in dashed lines. The extinguishing agent then enters the interior of the base body 3 and is released as a jet of drops by the swirl body 8 and nozzles 9. The sprinkler or base body is designed to be rotationally symmetrical. Nozzles 9 and swirl body 8 are also essentially rotationally symmetrical to the axis 91. Preferably, five nozzles 9 (only one is shown in section in Figure 1) are arranged in the base body 3. The nozzle axes span a cone around the axis of symmetry of the base body, the half angle K of which is approximately 40°.

In a preferred embodiment, the base body has an opening 42 for connecting one or more nozzle units not equipped with ampoules.

Claims (3)

Protection claims 1. Nozzle unit for spray mist consisting of a base body with openings for receiving nozzles and swirl bodies and for connection to supply lines for extinguishing agents, characterized in that at least two nozzles (9) are arranged and that the axes of symmetry of the nozzles (9) preferably have the same angle F among one another and are each at an angle (K) of 20 to 60° to the axis of symmetry of the rotationally symmetrical base body (3). 2. Nozzle unit according to claim 1, characterized that the axes of symmetry of the nozzles (9) have the same angle F with each other and are each at an angle (K) of 0.75 x (90 - P/2) to the axis of symmetry of the rotationally symmetrical base body (3). 3. Nozzle unit according to claim 2, characterized in that five nozzles (9) are arranged, which have an angle (F) of 72° to one another and thus an angle (K) of approximately 40° to the axis of symmetry of the base body (3).