12 results about "Compressed air foam system" patented technology

The invention provides a fire fighting truck integrated with double unmanned aerial vehicle sequential take-off systems and a control method thereof.The fire fighting truck comprises a chassis truck and a fire fighting carriage, a unit and a control system are installed in a cabin, a first unmanned aerial vehicle UAV1, a second unmanned aerial vehicle UAV2 and two lifting mechanisms are arranged, and sequential take-off of the unmanned aerial vehicles is controlled through logic of the control system; the unmanned aerial vehicle is provided with a spray pipe connected with a water hose, and the water hose is connected with the compressed air foam fire extinguishing system. According to the method, the collision risk among people, aircrafts and vehicles is fundamentally avoided through logic control, an environment pre-judgment mechanism is introduced, and initial condition safety of takeoff is ensured. And meanwhile, double independent lifting systems, high-capacity feeding, special power supply and cooperative flight control are deeply integrated, so that the fire fighting truck is transformed into a mobile operation base station with quick response, continuous combat and cluster control capabilities from a transportation platform, and machine-vehicle deep fusion and efficiency multiplication of the platform and equipment are realized.

The invention discloses a compressed air foam fire extinguishing system suitable for an electrochemical energy storage station, the compressed air foam fire extinguishing system comprises an energy storage box and a spray head, the energy storage box is internally provided with a plurality of unit cavities and a storage cavity, and the storage cavity is internally provided with a foam liquid output assembly; the foam liquid output assembly conveys foam liquid mixed with air to the spray head through the pipe network conveying assembly, a unit battery box is fixed in the unit cavity through a support, a charging base is installed in the unit battery box, and a shell is installed in the unit battery box through a translation mechanism. The translation mechanism is used for driving the shell to translate, and a first rotating shaft is rotationally connected into the shell in a sleeved mode. The fire extinguishing device is convenient to operate, good in stability, capable of achieving accurate fire extinguishing and good in fire extinguishing effect.

A compressed air foam system, CAFS (1), comprising a source (2) of water, an air management system (3) for providing a flow of compressed air, a solution dosing module (4) for providing an additive solution, and a mixing chamber module (5) configured to provide an air solution mixture to an output device (6), the mixing module (5) comprising an outlet conduit (8) fluidly connected to the output device (6) and an inlet conduit (7) fluidly connected to the source (2), the mixing module (5) comprising a plurality of bypass conduits (9a, 9b, 9c, 9d, 9e) between the inlet conduit (7) and the outlet conduit (8), the bypass conduits (9a, 9b, 9c, 9d, 9e) having different hydraulic diameters from each other and possibly valves (10) with associated different pressure openings.

The invention relates to a two-phase flow control method of a compressed air foam system in a low-temperature environment. The compressed air foam is a gas-liquid homogeneous mixture which is formed by injecting compressed air into a gas-liquid mixer, outputting the compressed air and a liquid-liquid mixer and fusing the compressed air with water and foam liquid; the method is characterized in that the specific two-phase flow control steps are as follows: under the condition that the flow of foam mixed liquid is maintained at a set value, the temperature and flow of gas output by a gas supply branch are regulated and controlled, and the set gas-liquid ratio is met; after the mixing ratio of foam liquid and water is regulated and controlled through the conductivity until the mixing ratio meets the deviation requirement, the foam mixed liquid and compressed gas are mixed in the gas-liquid mixer at the moment, and then whether the gas-liquid ratio continues to be adjusted or not is judged through 25% of drainage time, so that the two-phase flow is accurately controlled to meet the fire extinguishing performance requirement of compressed air foam. The problems that under the low-temperature environment, compressed air is lower than the dew point temperature and is prone to condensation, mixing ratio regulation and control are not accurate, and the actual drainage time of compressed air foam does not meet the requirement are solved.

The invention discloses a large-flow compressed air foam fire truck which comprises a chassis, a front box, a containing tank, a pump room, an auxiliary girder, a transmission system, a fire monitor and a compressed air foam system, and the compressed air foam system comprises an air compressor unit, a fire pump, a foam pump unit, a mixer and an electric control unit. An air compressor unit in the compressed air foam system is arranged in a front box to form a front box module, other parts, except the air compressor unit, in the compressed air foam system are arranged in a pump room, and a fire pump in the compressed air foam system is connected with a power takeoff of the chassis power system through a transmission system. The compressed air foam fire fighting truck provided by the invention can realize large flow and large liquid carrying capacity, is high in fire extinguishing capacity, and can meet the fighting requirements of heavy and extra-large petroleum, chemical and high-rise fire disasters, extra-high voltage converter transformer substations and other large fire disasters.

The application discloses a test method for performance test of a large-flow compressed air foam system in the technical field of compressed air foam, and aims to solve the problem that performance test of a compressed air foam system can only be attached to a fire vehicle for test in the prior art, and that test work is subject to external constraints. The test method comprises the following steps: obtaining test values of a standard mixed proportion of foam liquid; obtaining foam; obtaining liquid separated from the foam, and calculating a foam expansion ratio and a liquid separation time; obtaining actual values of a mixed proportion of the foam; judging whether an air mixing device and a fire monitor meet requirements; judging whether system performance parameters are qualified, and adjusting a working state of the system; and the application is suitable for performance test of a compressed air foam system, and can complete the work of obtaining foam by simulating a vehicle-mounted working condition, so that performance test of the compressed air foam system can be independently operated, and is no longer attached to a fire vehicle, and the practicability of the device is ensured.

A fire suppression system may include a tank and a manifold that may be inside or outside the tank. The tank, when charged, holds a liquid and a gas. The manifold has an inlet coupled to receive a liquid flow from the tank and inlets configured to receive gas flows. The gas flows may be from an upper portion of the liquid tank. An expansion chamber in the manifold receives the liquid flow and the gas flows, which create a liquid-gas vortex or circulation around the expansion chamber that produces foam.

The invention provides a compressed air foam system and a control method thereof, and relates to the technical field of fire fighting. The system comprises a water conveying pipeline used for conveying water; a rectifier is arranged on the water conveying pipeline; the foam pipeline is used for conveying a foam stock solution; the water conveying pipeline and the foam pipeline are respectively communicated with one end of the first mixing pipeline, and the first mixing pipeline is used for mixing water and the foam stock solution to obtain a foam mixed solution; the second mixing pipeline is communicated with the compressed air source and the other end of the first mixing pipeline, and the second mixing pipeline is used for mixing the foam liquid with compressed air to obtain compressed air foam. By means of the compressed air foam system, water flow in the water conveying pipeline tends to be laminar and stable, so that the detection precision of the water flow is improved, meanwhile, the control method improves the accuracy of the foam proportion and the stability of the system, and therefore the better foaming effect and the better fire extinguishing efficiency are obtained.

The invention discloses a method and a system for quickly leading foam of a foam pump of a compressed air foam system, the method is as follows: an electromagnetic control emptying valve which is opened and closed under the control of a PLC (Programmable Logic Controller) is mounted at an outlet of the foam pump of the compressed air foam system, when the compressed air foam system is started, the PLC opens the electromagnetic control emptying valve to enter emptying time; and after the emptying time is up, the PLC closes the electromagnetic control emptying valve, and the foam pump pumps the foam to a mixing pipeline of the compressed air foam system, so that the mixing of the water, the foam and the air is completed.

This invention discloses a fire extinguishing agent, relating to the field of fire extinguishing agent production technology. The fire extinguishing agent comprises a foaming agent, an emulsifier, a foam stabilizer, an antifreeze agent, a preservative, and water. The volume ratio of the foaming agent, emulsifier, foam stabilizer, antifreeze agent, preservative, and water is (25-40):(3-5):(25-40):(0.1-3):(2-41.9). The foaming agent comprises ionic surfactants and nonionic surfactants, with a volume ratio of ionic surfactants to nonionic surfactants of 1:(5-45). The foaming agent reduces the conductivity of the fire extinguishing agent, resulting in a conductivity of <20 μS / cm for the original solution and a conductivity of less than 100 μS / cm for the generated foam, making it suitable for extinguishing battery-related fires. When used in conjunction with a compressed air foam system, this fire extinguishing agent can produce uniform and stable fire extinguishing foam under different mixing ratios, gas-liquid ratios, and operating pressures.

The utility model relates to the technical field of fire fighting, in particular to a compressed air foam system. The compressed air foam system comprises a water supply unit and a foam supply unit. The foam supply unit comprises a foam pump, a first filter and a foam source, the first filter is provided with a first port, a second port and a third port, the first port is connected with the foam source through a first pipeline, the second port is connected with a liquid inlet of the foam pump through a second pipeline, and the third port is connected with a first emptying pipeline; the water supply unit comprises a fire pump, a first cleaning branch and a second cleaning branch, the other end of the first cleaning branch is connected with the first pipeline, and the other end of the second cleaning branch is connected with the second pipeline. The compressed air foam system can perform forward and reverse bidirectional cleaning on the first filter, a worker does not need to disassemble and clean the first filter, and the compressed air foam system is easy to maintain and high in reliability.

The application discloses a compressed air foam system applied to unmanned aerial vehicle high-rise fire extinguishing and a control method thereof. The compressed air foam system applied to unmanned aerial vehicle high-rise fire extinguishing comprises a high-low pressure fire pump, a foam pump, an air compressor and compressed air foam CAF. The high-low pressure fire pump comprises a high-pressure output end and a low-pressure output end. The high-pressure output end is connected with an unmanned aerial vehicle output port through a high-pressure pipeline. The low-pressure output end is connected with the compressed air foam CAF through a low-pressure pipeline. The low-pressure pipeline connected with the compressed air foam CAF is also connected with the foam pump and the air compressor respectively. The compressed air foam CAF is connected with the unmanned aerial vehicle output port.