DE2238971A1 - METHOD AND DEVICE FOR GENERATING AIR FOAM FOR FIRE EXTINGUISHING PURPOSES - Google Patents

Description

Patent attorneys Dipl.-Ing; W. Scherrmonn Dr.-Ing. R. Roger

73 Esslingen (Neckar), Fabrikstrasse. 9, P.O. Box 348

7. AUGUSt 1972 Stuttgart (0711) 35653?

35961?

Our sign:

PA 150 nana

Telegrams patent protection. Esslingennedcar

Minimax GmbH, 2b6o Bad Oldesloe, Industriestr. Io / 12

Method and device for generating air foam for fire extinguishing purposes

Addendum to patent (... patent application P 22 3i 1.76 .. 6)

The invention relates to a method for generating air foam for fire extinguishing purposes in a tube in which the foam-forming liquid while mixing with the for Foam generation required air on a sieve or mesh is sprayed on and behind the sieve or net around one Foam core jet of higher foaming - around a foam ring jet low foaming is generated. She concerns furthermore a device for generating air foam for Fire extinguishing purposes, consisting of a tube in which the foaming liquid mixed with. the for Foam generation required air on a sieve or mesh is sprayed on from an inner sieve or power pack large surface and from one of this' by an equal — 7 axially to the .Pipe extending limiting component separated outer.η sieve or power pack consists, according to patent (.... patent application P 22 33 176.6).

40980 9/006 3 _ "

The object of the invention is the method and the Device according to the main patent to be further improved *

According to the invention, in a further development of the method according to the main patent, more than half of the amount of foam-forming liquid used is used to generate the foam ring jet with low foaming. Preferably about 60% of the amount of foam-forming liquid used is used to generate the ring jet of low foaming. In this way, a foam core jet is created whose foaming is about twice as high as that of the foam ring jet. The foam of the foam ring jet of high foaming envelops the lighter foam of the foam core jet of low foaming, so that it cannot tear open when conveying ζ B. at an operating pressure of 2.5 bar and is conveyed just as far as the specifically heavier foam .

In a further development of the device according to the main patent, the inner sieve or are according to a further invention. Hetaste! 1 and the outer sieve or power supply unit attached to the delimitation component and the outer sieve or power supply unit is seated in a retaining ring which is fastened in the front of the tube against a shoulder. This results in a particularly simple attachment of the screen or network parts. The arrangement can also easily be designed in such a way that the sieve or network parts can be removed from the pipe for the purpose of cleaning or repair.

In the drawing, an embodiment of the invention, as far as this relates to the device, is shown. It demonstrate:

409809/006

Fig. 1 shows a foam generating device according to the invention partly in a side view and partly in an axial section,

2 shows the retaining ring with the power supply units in a front view and

3 shows the aforementioned retaining ring partly in a side view and partly in an axial section.

The atomizer nozzle 1, which has a coupling Io for coupling the hose carrying the foam-forming liquid is connected to the tube 3 by three struts 11.

At the end of the tube 3 the zigzag shape is formed Power supply 4 within the cylindrical limiting power supply 5 attached. This also carries the ring-shaped power pack 7 * on the outside The outer annular power supply 7 is in turn of a Retaining ring 8 added, which thus die.gesamte network arrangement carries, by retaining ring 8 is attached to the front in the tube 3 and lies against a paragraph 9 of the pipe 3.

409809/0063 - 4 -

Claims (2)

- 4 - · '■■' · r. ■ Claims 1. Method for generating air foam for fire extinguishing purposes in a tube in which the foam-forming liquid is mixed with that required for foam generation Air is sprayed onto a sieve or mesh and behind the sieve or net around a foam core jet of higher foaming around a foam ring jet of lower foaming is generated, according to patent (... patent application P 22 33 176.6), characterized in that more than the Half of the amount of foam-forming liquid used to generate the ring jet of low foaming serves. 2. The method according to claim 1, characterized in that about 6o% of the amount of the show-forming liquid used to generate the foam ring jet with low hardening serves. Device for generating air foam for fire extinguishing purposes, consisting of a tube in which the foam-forming Liquid is sprayed onto a sieve or net while mixing with the air required to generate foam is made up of an inner sieve or network part with a large surface and one of this through an equiaxed one According to the patent (... patent application P 22 33 176.6), characterized in that the inner sieve or net part (4) and the outer sieve or net part (7) the limiting component (5) are attached and the outer screen or power supply unit (7) sits in a retaining ring (8) which is in front is fastened in the tube (3) against a shoulder (9). 409809/0063 Γ. L e r p a g e