Method for addition of fire suppression additive to base foam solutions

Patent metadata

Field	Value
Publication number	US-12048857-B2
Application number	US-202017089365-A
Country	US
Kind code	B2
Filing date	Nov 4, 2020
Priority date	Jan 8, 2019
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A method of proportioning a finished foam at or near a hazard comprising proportioning and delivering a first finished foam to the hazard, determining if the first finished foam extinguishes or suppresses the hazard, if not, selecting an amount of a fluorinated additive, and proportioning a foam solution including the selected amount of the fluorinated additive to form a fluorinated finished foam. A foam injection system is also disclosed.

First claim

What is claimed is:

1. A foam injection system, comprising:
a first pump coupled with a foam supply;
a second pump coupled with an additive supply;
at least one of a water supply and a water pump that receives water from the water supply; and
a flow controller comprising one or more processors and computer-readable instructions that when executed by the one or more processors, cause the one or more processors to:
determine a first flow rate of foam outputted by the first pump;
determine a second flow rate of water outputted by the at least one of the water supply and the water pump;
identify a first target ratio of water and foam;
control the first flow rate based on the second flow rate and the first target ratio; and
control a third flow rate of additive outputted by the second pump based on the second flow rate and a second target ratio of water and additive.

2. The foam injection system of claim 1 , wherein:
the flow controller is to determine the first flow rate based on a foam pump speed of the first pump, a discharge pressure of the first pump, a displacement of the first pump, and a volumetric efficiency of the first pump.

3. The foam injection system of claim 1 , wherein:
the flow controller is to determine the second flow rate based on a water pump speed of the water pump, a differential pressure of the water pump, and a shaft input power of the water pump.

4. The foam injection system of claim 1 , comprising:
the first pump comprises at least one of a positive displacement pump and a manual override input.

5. The foam injection system of claim 1 , comprising:
a mixing point that receives the water from the at least one of the water supply and the water pump and the foam from the first pump and outputs a foam solution.

6. The foam injection system of claim 1 , comprising:
a mixing point that receives the water from the at least one of the water supply and the water pump and the foam from the first pump and outputs a foam solution; and
one or more pipes that provide a first flow of the water from the at least one of the water supply and the water pump to the mixing point and a second flow of the water from the at least one of the water supply and the water pump to a separate outlet from the mixing point.

7. The foam injection system of claim 1 , wherein:
the first pump is to directly inject the foam into the water from the at least one of the water supply and the water pump.

8. The foam injection system of claim 1 , wherein:
the additive supply is a fluorinated additive supply.

9. A method, comprising:
determining, by one or more processors, a first flow rate of foam outputted by a first pump;
determining, by the one or more processors, a second flow rate of water outputted by at least one of a water supply and a water pump that receives water from the water supply;
identifying, by the one or more processors, a first target ratio of water and foam;
controlling, by the one or more processors, the first flow rate based on the second flow rate and the first target ratio; and
controlling, by the one or more processors, a third flow rate of additive outputted by a second pump coupled with an additive supply based on the second flow rate and a second target ratio of water and additive.

10. The method of claim 9 , comprising:
determining, by the one or more processors, the first flow rate based on a foam pump speed of the first pump, a discharge pressure of the first pump, a displacement of the first pump, and a volumetric efficiency of the first pump.

11. The method of claim 9 , comprising:
determining, by the one or more processors, the second flow rate based on a water pump speed of the water pump, a differential pressure of the water pump, and a shaft input power of the water pump.

12. The method of claim 9 , wherein:
the first pump comprises at least one of a positive displacement pump and a manual override input.

13. The method of claim 9 , comprising:
receiving, by a mixing point, the water from the at least one of the water supply and the water pump and the foam from the first pump; and
outputting, via the mixing point, a foam solution.

14. The method of claim 9 , comprising:
receiving, by a mixing point, the water from the at least one of the water supply and the water pump and the foam from the first pump; and
providing, via one or more pipes, a first flow of the water from the at least one of the water supply and the water pump to the mixing point and a second flow of the water from the at least one of the water supply and the water pump to a separate outlet from the mixing point.

15. The method of claim 9 , comprising:
directly injecting, by the first pump, the foam into the water from the at least one of the water supply and the water pump.

Assignees

• Tyco Fire Products Lp

Inventors

• Lavergne Eric
• Morrison John D
• Libal John P
• Gaspard Brent
• Staszak Adam

Classifications

• A62C31/12

  for delivering foam or atomised foam · CPC title

• A62C5/02 Primary

  of foam · CPC title

• A62D1/0071

  Foams · CPC title

• A62D1/0085 Primary

  containing perfluoroalkyl-terminated surfactant · CPC title