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266 results about "Flammable liquid" patented technology

A flammable liquid is a combustible liquid which can be easily ignited in air at ambient temperatures, i.e. it has a flash point at or below nominal threshold temperatures defined by a number of national and international standards organisations.

Method for fighting fire in confined areas using nitrogen expanded foam

The method of the invention comprises the steps of proportioning a foam concentrate into a non-flammable liquid to form a foam concentrate / liquid mixture and creating a flowing stream of the foam concentrate / liquid mixture. Nitrogen is introduced into the stream of the foam / liquid mixture to initiate the formation of a nitrogen expanded foam fire suppressant. In one embodiment the nitrogen is chilled below ambient temperature. The flowing stream carrying the initially nitrogen expanded foam is dispensed, which completes the full expansion of the nitrogen expanded foam fire suppressant, into the confined area involved in fire thereby to smother the fire and to substantially close off contact between combustible material involved in fire and the ambient atmosphere substantially reducing the danger of explosion or flash fires. The system for creating and dispensing the nitrogen expanded foam can be self-contained and includes a proportioner, a source of foam concentrate, a source of nitrogen and a dispenser for completing the extension and dispensing of the nitrogen expanded foam. A chiller can be included to chill the nitrogen below ambient temperature. Optionally a power generator can be incorporated into the system in instances where power is not available. The apparatus for expanding and dispensing foam comprises a housing defining an interior through which extends a discharge line. The ends of the housing are closed about the ends of the discharge line and the ends of the discharge line extend beyond the ends of the housing to define a connector at one end for receiving a stream of foam concentrate / liquid and at the opposite end to define the foam dispensing end of the apparatus. A portion of the discharge line in the housing defines an eductor for introduction of the expanding gas into the stream of foam concentrate / liquid flowing through the discharge line.
Owner:OZMENT ALDEN

Method and device for measuring liquid thermal conductivity factor

The invention discloses a method for measuring liquid thermal conductivity coefficient and the device thereof. The invention adopts homeostasis hotline principle to measure liquid thermal conductivity coefficient. The calculation formula of the liquid thermal conductivity coefficient is used when different heat sources are applied under the condition of one dimensional conduction respectively deduced by Fourier heat conduction basic law. Then the heat generated by the heating resource which is transmitting heat. And the liquid thermal conductivity coefficient is calculated by measuring the temperature difference at particular points in heat conduction direction when heat balanced. High-temperature resistant coaxial double-layer pipes are used as outer pipes while heat stable heating tube used as inner pipes. Liquid to be measured is packed in the space between the inner and the outer pipes. The ratio of the length of the outer pipe to the external diameter of the outer pipe exceeds is greater than 10. The way of heating of the inner pipe adopts constant-temperature and uniform-speed circulating water or tempering wire and filled with high temperature resistant liquid at the same time. The former is suitable for common liquid and the latter for high temperature flammable liquid. The invention has the advantages of simple structure, large serviceable range and high accuracy rating, thus measuring the coefficients of heat conductivity of various liquids simply and precisely is possible.
Owner:吴永刚

Method and apparatus for fighting fires in confined areas

The method of the invention comprises the steps of proportioning a foam concentrate into a non-flammable liquid to form a foam concentrate/liquid mixture and creating a flowing stream of the foam concentrate/liquid mixture. Nitrogen is introduced to the stream of the foam/liquid mixture to initiate the formation of a nitrogen expanded foam fire suppressant. The flowing stream carrying the initially nitrogen expanded foam is dispensed, which completes the full expansion of the nitrogen expanded foam fire suppressant, into the confined area involved in fire thereby to smother the fire and to substantially close off contact between combustible material involved in fire and the ambient atmosphere substantially reducing the danger of explosion or flash fires. The apparatus of the invention is adapted for expanding and dispensing foam and comprises a housing defining an interior through which extend a discharge line. The ends of the housing are closed about the ends of the discharge line and the ends of the discharge line extend beyond the ends of the housing to define a connector at one end for receiving a stream of foam concentrate/liquid and at the opposite end to define the foam dispensing end of the apparatus. A portion of the discharge line in the housing defines an eductor for introduction of the expanding gas into the stream of foam concentrate/liquid flowing through the discharge line.
Owner:OZMENT ALDEN

Transmission-type optical fiber liquid level sensor with irregular core structure

The invention discloses a transmission-type optical fiber liquid level sensor with an irregular core structure. The transmission-type optical fiber liquid level sensor comprises a wideband light source, a sensing head and an optical fiber spectrum analyzer, wherein the sensing head is formed by welding a section thin core single mode fiber onto the middle of common single mode fiber, during measurement, one part of the thin core single mode fiber is positioned on a liquid level, and the other part of the thin core single mode fiber is positioned below liquid level. The common single mode fiber receives light coming from a wideband light source and is coupled to the thin core single mode fiber, so that the light is transmitted inside the thin core single mode fiber in a form of a mandrel and a cladding mode so a to form an interferometer similar to Mach-Zehnder interferometer. Light of the two parts interferes mutually and then is coupled into the common single mode fiber again and finally led into an optical fiber spectrum analyzer. By measuring drift amount of wave length of the characteristic peak in transmitted spectrum, the liquid-level variation can be calculated. The transmission-type optical fiber liquid level sensor has a compact structure, has the benefits of simplicity in preparation, high measuring accuracy, wide measuring range, safety, explosion protection and the like, and is particularly suitable for precision measurement to liquid level of inflammable liquid.
Owner:CHINA JILIANG UNIV

Flammable liquid planar free-flowing combustion simulation experimental device and method

The invention relates to a flammable liquid planar free-flowing combustion simulation experimental device and method. The device comprises an oil supply system, a rogue system, an overflow system anda test system. The flammable liquid is pre-placed in an oil drum, and is flown into a flow surface tray through a peristaltic pump, a silicone hose and a steel pipe buffer tub for ignition and burning, a thermocouple tree of the test system, a camera, a bonded thermocouple, a radiant heat flow meter and an infrared thermal imager are employed to perform experiment data and image collection, and are connected with a multi-channel data collection instrument for remote data transmission, real-time display and control so as to achieve measurement of parameters such as flow burning areas, temperatures, heat radiation and the flame heights, and through change of the leakage parameters, material cushion and flow surface angles, the flammable liquid planar free-flowing combustion simulation experimental device and method are high in experiment efficiency, safe and controllable, simple to operate, convenient to use and accurate in measurement, and can develop planar free-flowing combustion state research of different substances, different flow surface types and different flow angles.
Owner:应急管理部天津消防研究所

High efficiency low pollution hybrid Brayton cycle combustor

A power generating system is described which operates at high pressure and utilizes a working fluid consisting of a mixture of compressed non-flammable air components, fuel combustion products and steam. The working fluid exiting the power generating system is substantially free of NOx and CO.
Working fluid is provided at constant pressure and temperature. Combustion air is supplied by one or more stages of compression. Fuel is injected at pressure as needed. At least about 40% of the oxygen in the compressed air is consumed when the fuel is burned. Inert liquid is injected at high pressure to produce working an inert mass of high specific heat diluent vapor for use for internal cooling of the combustion chamber.
The use of non-flammable liquid injection inhibits the formation of pollutants, increases the efficiency and available horsepower from the system, and reduces specific fuel consumption. Control systems allow the independent control of the quantity, temperature and pressure of the air, fuel and non-flammable liquid introduced in the combustion chamber allowing control of the maximum temperature and average temperature within the combustion temperature as well as the temperature of the exhaust from the combustion chamber.
Owner:VAST POWER PORTFOLIO

Fire protection apparatus and method

A fire protection apparatus includes a plurality of bladders that are substantially filled with a non-flammable liquid via a manifold that is coupled to a source of non-flammable liquid and includes one or more nozzles that discharge the non-flammable liquid into each of the plurality of bladders. In one specific embodiment, the apparatus is initially in a substantially collapsed state at or near a ceiling. When fire or smoke is detected, the non-flammable liquid flows into the manifold. As the plurality of bladders begin to fill with non-flammable liquid, the weight of the filling bladders causes the fire protection apparatus to deploy, spanning from ceiling to floor. The bladders may include one or more discharge orifices that allow the non-flammable liquid to flow out of the bladder and down the exterior of the bladder once the bladder is filled to the level of its discharge orifices. In another embodiment, stationary bladders may be placed in walls, such as between buildings or between rooms in a building, to provide fire protection. These stationary bladders are filled using a manifold similar to the deployable embodiment until the bladders are substantially full. In both embodiments, the bladders may include separations between one or more of the bladders that allow a person to pass through the fire protection apparatus, if needed.
Owner:ROBINSON JR EDWARD L
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