US 12,337,202 B2
Method and liquid mixing system for providing a liquid/foam mixture
Lukas Platzer, Leonding (AT)
Assigned to Rosenbauer International AG, Leonding (AT)
Appl. No. 17/922,030
Filed by Rosenbauer International AG, Leonding (AT)
PCT Filed Apr. 28, 2021, PCT No. PCT/AT2021/060149
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/217193, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. A 50367/2020 (AT), filed on Apr. 29, 2020.
Prior Publication US 2023/0191174 A1, Jun. 22, 2023
Int. Cl. A62C 5/02 (2006.01); A62C 5/00 (2006.01); B01F 23/232 (2022.01); B01F 23/235 (2022.01)
CPC A62C 5/022 (2013.01) [A62C 5/002 (2013.01); A62C 5/008 (2013.01); B01F 23/2323 (2022.01); B01F 23/235 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method for providing a liquid-foam mixture by mixing water with at least one additive (4, 35) by means of a liquid mixing system (1), in which the following steps are carried out:
providing a water pressure source (2) for discharging the water,
providing at least one first additive reservoir unit (3) with a first additive (4) accommodated therein,
providing an air compressor unit (5) for providing compressed air, comprising a compressor (6) and a drive device (7), wherein the drive device (7) is drive-connected to the compressor (6),
providing a first mixing device (8) with a first mixing chamber (9) for admixing at least the first additive (4) to the water discharged from the water pressure source (2),
providing a second mixing device (10) with a second mixing chamber (11) for optionally admixing compressed air to the liquid-foam mixture discharged from the first mixing device (8), and a connecting line (12) connecting the two mixing devices (8, 10) to one another,
providing a discharging unit (13) for discharging the liquid-foam mixture with a connection device (14) and a discharge line (15), by means of which discharge line (15) the connection device (14) is line-connected to the mixing devices (8, 10),
providing a water line network (16) with at least one first water feed line (17), by means of which first water feed line (17) the first mixing device (8) is line-connected to the water pressure source (2),
providing an additive line network (18) with at least one first additive line (19), by means of which first additive line (19) the first additive reservoir unit (3) is line-connected to the first mixing device (8),
providing a compressed air line network (20) with a first compressed air line (21), by means of which compressed air line (21) the second mixing device (10) is optionally line-connected to the compressor (6),
feeding the water from the water pressure source (2) to the first mixing device (8) via the first water feed line (17),
feeding at least the first additive (4) from the first additive reservoir unit (3) to the first mixing device (8) via the first additive line (19),
mixing the water with the at least one additive (4) by means of the first mixing device (8) and forwarding the liquid-foam mixture from the connection device (14) to the discharging unit (13),
wherein
the drive device (7) of the air compressor unit (5) is formed by a water engine or a water turbine comprising at least one water inlet (23) and at least one water outlet (24),
a second water feed line (25) is provided, and the at least one water inlet (23) of the water engine or the water turbine is line-connected to the water pressure source (2) via the second water feed line (25), and
the water discharged from the water pressure source (2) is fed to the water engine or the water turbine via the second water feed line (25), and the water engine or the water turbine is driven by pressurized water of the water pressure source (2).