36 results about "Compressed air foam system" patented technology

A dispersion and aeration apparatus including a nozzle portion (11) having a first passage (14) having at least one inlet (15) and at least one outlet (16) for a first fluid, and a second passage (17) having at least one inlet (18) and at least one outlet (19) for a second material, the first passage outlets (16) located so that the first fluid mixes with the second material as it exits the second passage outlet (19) to aerate and disperse the second material in a predetermined direction.

A one-touch Compressed Air Foam System (CAFS) is provided that allows for a simplified user interface and simplified user operation. The user interface allows the CAFS to activate upon a single press of a single button. An electronic controller checks that several CAFS device parameters show that the CAFS is capable of operating. The controller gathers the device parameter data from a diagnostic system present in the CAFS that gives data pertaining to whether water is flowing, whether foam concentrate is present in the system, whether foam is flowing, and whether the temperature of an air compressor is within a safe range for operation. If the above device parameters are found to be in condition for safe operation of the CAFS, the controller will start and maintain operation until either one of the above falls out of tolerance or the user initiates a shut down of the CAFS.

A system which is sufficiently compact and portable to be moved via skid support platform to a multi-wheel diesel-powered host containing active pump and roll capability with front and rear active hydraulics, such as a Bobcat Toolcat Turbo 5600. The system contains a water tank, generally 150 gallons, as well as built in foam tank. The system is wholly powered by the hydraulic system of the host vehicle powering a hydraulic motor on the system. The system hydraulic motor turns a serpentine belt at sufficient RPM's to power a water pump, air compressor and the compressed air foam system (CAFS) module. Using solely the power provided by the hydraulic motor, water is drawn from the tank, either used alone or mixed with foam at the percentage inputted by the user. Compressed air is added and the air alone, water alone or water/foam mixture is routed via adjustable valve to either the 1 inch firefighters hose or the rigid waterway ending in an adjustable, movable nozzle attached to the cab roof of the host.

A system for a firefighting vehicle including a single compressor, driven by the engine of the firefighting vehicle, which generates a compressed fluid supply for operation of both the compressed air foam system and air brakes of the firefighting vehicle. The system can include a fluid storage tank that receives compressed fluid generated by the compressor. The storage tank can be in fluid communication with a dryer and a foaming system. The dryer dries a portion of the compressed fluid and supplies the dry fluid to one or more brake system tanks, which further provide a fluid supply to one or more air brakes of the vehicle to provide a braking force to stop the vehicle. An optionally undried portion of the fluid in the fluid storage tank can be in communication with a conduit which is further in communication with a foam supply and a liquid supply which mix with the compressed fluid to create a compressed fluid foam firefighting material.

The invention discloses a large-flow compressed air foam system. The large-flow compressed air foam system comprises a water inlet (2), a water pump (1), a Venturi tube (4), a metering valve (8), a foam liquid flow meter (7) and a foam liquid tank (5), wherein the water pump (1) and the Venturi tube (4) are connected with the water inlet (2), the metering valve (8) is connected with the Venturi tube (4), the foam liquid flow meter (7) is connected with the metering valve (8), and the foam liquid tank (5) is connected with the foam liquid flow meter (7); and the water pump (1) is sequentially connected with a main flow meter (9), a check valve (10) and a mixer (12) through pipelines, and the mixer (12) is separately connected with an air compressor (11), a fire-fighting monitor (16), a first fire-fighting water gun (17) and a second fire-fighting water gun (18). The large-flow compressed air foam system is reasonable in structural design, convenient to use, capable of meeting the requirement of a large-flow B-type compressed air foam system, high in fire-fighting operation capacity, good in fire-extinguishing performance, capable of preventing plugging of a filter screen of a foam pump, long in service life and high in practicability.

The invention relates to a compressed air foam hydrant system of a tunnel rescue station and a fire extinguishing method. When a fire happens at the tunnel rescue station, field operators open one or more compressed air foam hydrants and press a start button; a system controller starts a compressed air foam generating device, a sectional control valve is started, the water flow is adjusted automatically according to the number of signals fed by alarm control units, and the foam fluid and air flow are also automatically adjusted according to the water flow, so that compressed air form is formed; the field operators hold foam guns with hands to align at the ignition area of a train so as to jet the compressed air foam, so that targeted fire extinguishing is achieved; and after the fire is extinguished, the system recovers to the initial state of the normal condition. Through the mode that the dual foam gun compressed air foam hydrants are adopted, the situation that the whole hydrant system fails when one set of hydrant breaks down is avoided, the safety and reliability of the system are ensured, the foam flow of each single foam gun can be reduced, and accordingly the foam guns are easier to control. The safety, reliability and high fire extinguishing efficiency of the system are ensured.

A pressure regulator is capable of automatically regulating the inlet water pressure to a compressed air foam system (CAFS), thereby allowing direct connection between a high-pressure water source, such as a hydrant, and the CAFS. The pressure regulator includes an inlet, a valve that regulates flow from the inlet, and an annular piston that circumscribes the inlet and which is linked to the valve. The relative area of the inlet and the piston determine the maximum pressure that may be attained at the CAFS water inlet, due to pressure on the piston forcing the valve closed.

The invention discloses a compressed air foam fire fighting truck as well as an operation control device, a system and a method thereof. The control device comprises a receiver and a controller, wherein the receiver is used for receiving a water absorption manner of the fire fighting truck, and the controller is used for executing the following steps: carrying out corresponding water absorption control by the fire fighting truck according to the water absorption manner; controlling an engine to start; controlling an air compressor and a water pump power takeoff to engage the gear; controlling a foam proportion controller to mix foam and water; and adjusting the rotating speed of the engine, so that the rotary speed reaches a predetermined value or the pressure of a compressed air foam injection orifice reaches a predetermined value to realize reliable control on operation of the compressed air foam fire fighting truck so as to avoid equipment damage probably caused by mis-operation.

The invention discloses a land-aviation dual-use unmanned-aerial-vehicle-borne intelligent firefighting technology for traditional villages. The method comprises the following steps of (1) positioninga fire location: a fire emergency dispatching integrated platform acquires a location of an ignition point in the earlier stage through detecting and reporting manners and generates a planning routeaccording to a coordinate point of the ignition point, and a dual-use unmanned-aerial-vehicle-borne compressed air foam system (CAFS) firefighting device arrives at the ignition point along the planning route so as to carry out firefighting; and (2) detecting a fire behavior: a dual-use unmanned aerial vehicle detects temperature and smog concentration within a certain range through an airborne temperature sensor and an airborne smog sensor, and an airborne camera is matched to shoot a fire picture and carries out information interaction with the fire emergency dispatching integrated platformthrough wireless communication. The land-aviation dual-use unmanned-aerial-vehicle-borne intelligent firefighting technology for the traditional villages is simple in framework, the fire behavior is detected based on an unmanned aerial vehicle technology, specific cross firefighting can be realized, and the fire behavior control ability is high.

The invention provides a compressed air foam-based intelligent fire-fighting device for an externally-floating-top crude oil storage tank. The compressed air foam-based intelligent fire-fighting device comprises fire-fighting cabinets and foam fire-extinguishing pipelines, wherein a compressed air foam system and a fire-fighting linkage controller are arranged inside each fire-fighting cabinet; the compressed air foam system comprises a gas energy storage tank, a mixed foam solution storage tank, a compressed air storage tank and a gas-liquid mixing device; the gas energy storage tank is communicated with the mixed foam solution storage tank through a driving pipeline; the mixed foam solution storage tank is connected with a liquid inlet of the gas-liquid mixing device through the foam solution conveying pipeline; a gas inlet of the gas-liquid mixing device is connected with the compressed air storage tank through a compressed air conveying pipeline; a foam outputting pipeline is connected to an outlet of the gas-liquid mixing device; the fire-fighting linkage controller is fixed to the fire-fighting cabinet and is eclectically connected with electrically controlled switching valves; the foam fire-extinguishing pipelines are circumferentially sequentially laid between the inner wall of the storage tank and the outer edge of a floating plate at intervals; a plurality of closed nozzles are formed at intervals in the length direction; the foam outputting pipelines of the fire-fighting cabinets are communicated with the foam fire-extinguishing pipelines.

The invention discloses a multi-input single-output compressed air foam system based on a PLC. The system comprises a water flow detection unit connected with a foam loop control algorithm unit and an air loop control algorithm unit. The water flow detection unit, the foam loop control algorithm unit and the air loop control algorithm unit are all connected with the PLC, and the PLC is further connected with the alarm. The invention further discloses a control method of the multi-input single-output compressed air foam system based on the PLC. The problems that in the prior art, a compressed air foam device is immature in control method, unstable in control, unreliable in result, unobvious in fire extinguishing effect and unstable in foam quality are solved.

The invention discloses a vehicle-mounted compressed air foam system and a vehicle with the same. The system acquires power through a vehicle power assembly, and acquires air of corresponding flow and pressure, water and foam liquid through an air balance component, a water supply component and a foam proportionally mixing component. An air compressor air inlet valve in the air balance component is communicated with a vent hole disposed on a vehicle exhaust pipe, so that air passing through the exhaust pipe enters the air compressor. By opening the vent hole on the vehicle exhaust pipe, the compressed gas of foam for fire extinguishment is made from gas passing through the exhaust pipe, so that the content of air in the foam for fire extinguishment can be effectively reduced, and then the fire extinguishing efficiency is greatly improved.

The fully-integrated compressed air foam fire extinguishing module comprises a base, an electric control assembly, a gasoline engine assembly, a fire pump assembly, a foam pump assembly and a screw air compressor conveying assembly, wherein the electric control assembly, the gasoline engine assembly, the fire pump assembly, the foam pump assembly and the screw air compressor conveying assembly are integrally installed on the base. Wherein the gasoline engine assembly drives the fire pump assembly to operate so as to convey water from a fire hydrant into the mixing pipe; the gasoline engine assembly drives the foam pump assembly to operate, so that the foam pump assembly conveys foam liquid in the foam liquid box into the mixing pipe, and the foam liquid in the mixing pipe is mixed with water in proportion to form mixed liquid; the proportioning mixer is communicated with the mixing pipe, so that the mixed liquid in the mixing pipe enters the proportioning mixer; the gasoline engine assembly drives the screw air compressor conveying assembly to operate, so that compressed air is cooled through the heat exchanger assembly and then conveyed into the proportioning mixer. The invention fills the blank in the fire extinguishing grade of the common compressed air foam system, and is flexible to use.

An apparatus for generating foam for use in a compressed air foam system (CAFS) incorporates two plates housed in a chamber. A surfactant solution enters the chamber through an orifice in one plate. Pressurized air enters the chamber through a number of channels bored through the other plate, the channels appearing in an annular groove which circumscribes the solution inlet. The restricted area between the plates balances the pressure between the incoming solution and air by achieving an equilibrium at some particular radius out from the center of the two plates. A liquid, such as water or a surfactant and water solution, may optionally be introduced through an inlet into the chamber. The resulting mixture is fed through a main outlet positioned along the chamber wall.

A dispensing unit that consists of two or more dispensing solutions, at least one being a fluorine-free foam solution, and at least one hydrogel-based solution, and which involves the dispensing of each solution through one or more compressed air foam system (CAFS), where the CAFS may use compressed air, nitrogen, or other inert gas. The individual solutions may be mixed prior to the CAFS, or one or more solutions mixed after the CAFS, or they may be mixed in separate CAFS chambers. The resulting foam may be dispensed through a single line or through multiple lines, applied simultaneously and/or at different times, and may be controlled manually and/or through automatic controls, or through a combination of the above.