Disclosed is a mixed jet flow fire extinguishing system, including a water spray nozzle and a powder spray nozzle. A water spray port of the water spray nozzle and a powder spray port of the powder spray nozzle do not overlap; super absorbent resin powder sprayed from the powder spray nozzle is externally mixed in the air with a water flow sprayed from the water spray nozzle. A powder spray direction A of the powder spray nozzle is inclined relative to a water flow spray direction B of the water spray nozzle. The technical bottleneck of using sodium polyacrylate resin powder as a fire extinguishing agent in the prior art is solved, so that the sodium polyacrylate resin powder can be smoothly and continuously sprayed into a fire, without blocking the powder spray port.

The application discloses a mixed-spray firefighting device, which includes a water nozzle and a powder nozzle. The water nozzle is disposed around an outside of the powder nozzle, and a powder spray port of the powder nozzle is provided behind a water spray port of the water nozzle. A fire-extinguishing agent powder sprayed from the powder nozzle and a water flow sprayed from the water nozzle are mixed in air outside the firefighting device. The fire-extinguishing agent powder is preferably sodium polyacrylate resin powder. The application solves the technical bottleneck of using the sodium polyacrylate resin powder as a fire-extinguishing agent in the prior art, so that the sodium polyacrylate resin powder can be sprayed into a fire field smoothly and continuously without blocking the powder spray port.

A lance, in particular for jointly dispensing a pressurized fluid and an additive for penetrating walls, includes a lance body, a handle arrangement, multiple channels and actuator arrangements interacting therewith, a nozzle arrangement as well as at least one container for the additive. The actuator arrangements selectively control the fluid being conducted in the first channel, the additive being conducted in the second channel, and the ambient air being conducted in the third channel to a first nozzle body. The third channel forms a line connection between the ambient air and a mixing chamber of the first nozzle body. The second actuator arrangement with its second actuator directly acts on the third channel and indirectly controls the admixing of the additive via the second channel into the mixing chamber.

A lance, in particular for jointly dispensing a pressurized fluid and an additive for penetrating walls, includes a lance body, a handle arrangement, multiple channels and actuator arrangements interacting therewith, a nozzle arrangement as well as at least one container for the additive. The actuator arrangements selectively control the fluid being conducted in the first channel, the additive being conducted in the second channel, and the ambient air being conducted in the third channel to a first nozzle body. The third channel forms a line connection between the ambient air and a mixing chamber of the first nozzle body. The second actuator arrangement with its second actuator directly acts on the third channel and indirectly controls the admixing of the additive via the second channel into the mixing chamber.

A fire engine including a vehicle frame, a liquid nitrogen storage tank, a liquid nitrogen conveying pipeline, a gasification device, a plurality of electric valves, a water pipe adapter, a liquid nitrogen spray gun, and a mixed spray gun. The liquid nitrogen conveying pipeline includes a first pipeline and a second pipeline. The first pipeline connects the lower part of the liquid nitrogen storage tank, the gasification device, and the upper part of the liquid nitrogen storage tank sequentially in that order. The second pipeline connects the liquid nitrogen storage tank, an input end of the liquid nitrogen spray gun, and a first input end of the mixed spray gun. The mixed spray gun includes a first input end, a second input end, a liquid nitrogen nozzle, and a spray pipe. The spray pipe includes a contraction section, an expansion section, and an acceleration section.

A fire engine including a vehicle frame, a liquid nitrogen storage tank, a liquid nitrogen conveying pipeline, a gasification device, a plurality of electric valves, a water pipe adapter, a liquid nitrogen spray gun, and a mixed spray gun. The liquid nitrogen conveying pipeline includes a first pipeline and a second pipeline. The first pipeline connects the lower part of the liquid nitrogen storage tank, the gasification device, and the upper part of the liquid nitrogen storage tank sequentially in that order. The second pipeline connects the liquid nitrogen storage tank, an input end of the liquid nitrogen spray gun, and a first input end of the mixed spray gun. The mixed spray gun includes a first input end, a second input end, a liquid nitrogen nozzle, and a spray pipe. The spray pipe includes a contraction section, an expansion section, and an acceleration section.

The invention relates to small-sized mobile robotic fire extinguishing units to monitor extreme situations and conduct recovery operations in the hazardous area under extremely dangerous conditions and/or in inaccessible areas, including nuclear power plants. The fire extinguishing unit includes a tracked assembly with housing mounted on it, a control panel and a drive part with an accumulator battery inside the housing, a fire extinguishant feed element mounted on the housing with remote control capability, video surveillance system, a connecting pipeline, the outlet of which is connected to the inlet of the fire extinguishant supply element, the connection pipeline is installed inside the housing.

Illustrative embodiments of the disclosure are generally directed to barrier-piercing firehose nozzle assemblies suitable for selective application of water and/or other extinguishing liquid to an open fire or piercing a ceiling, floor or other barrier and applying the liquid to a fire concealed above, below or on the other side of the barrier. An illustrative embodiment of the barrier-piercing firehose nozzle assemblies may include a nozzle inlet housing having an inlet housing interior. A spray nozzle may be disposed in fluid communication with the inlet housing interior. A barrier-piercing applicator may be disposed in fluid communication with the inlet housing interior. The barrier-piercing applicator may be selectively deployable between a retracted position and an extended position. At least one discharge opening may be provided in the barrier-piercing applicator. A selector valve may be provided in the inlet housing interior. The selector valve may be selectively deployable in a first valve position in which the selector valve is disposed in fluid communication with the spray nozzle and a second valve position in which the selector valve is disposed in fluid communication with the barrier-piercing applicator.

Illustrative embodiments of the disclosure are generally directed to barrier-piercing firehose nozzle assemblies suitable for selective application of water and/or other extinguishing liquid to an open fire or piercing a ceiling, floor or other barrier and applying the liquid to a fire concealed above, below or on the other side of the barrier. An illustrative embodiment of the barrier-piercing firehose nozzle assemblies may include a nozzle inlet housing having an inlet housing interior. A spray nozzle may be disposed in fluid communication with the inlet housing interior. A barrier-piercing applicator may be disposed in fluid communication with the inlet housing interior. The barrier-piercing applicator may be selectively deployable between a retracted position and an extended position. At least one discharge opening may be provided in the barrier-piercing applicator. A selector valve may be provided in the inlet housing interior. The selector valve may be selectively deployable in a first valve position in which the selector valve is disposed in fluid communication with the spray nozzle and a second valve position in which the selector valve is disposed in fluid communication with the barrier-piercing applicator.

An emitter system capable of discharging an atomized liquid-gas stream or a liquid stream which atomizes into a spray has a source of pressurized gas and one or more sources of pressurized liquids. Flow of gas and liquid to an emitter is controlled by valves, and the emitter can be used to discharge either the atomized liquid-gas stream or the liquid stream. The emitter system may be used for fire suppression.