6 results about "Back-fire" patented technology

The invention includes an air mover device used for fire mitigation and protection. The core component is an air mover unit whose discharge airstream can be positioned using air rudders and / or a directional control assembly to provide air flows in optimum directions and capacity to counter unwanted fire progression or to promote fires in cases of back-burns. Additional support components include a power supply, its fuel source, a speed control mechanism for the air mover, an air mover inlet protective screen, a sparger unit to impart suppressant or retardant into the airstream, balancing feet, a removable nozzle, and instrumentation and controls to ensure function and safety of equipment and personnel. This device can be on a static or mobile platform, towed or self-propelled and can be locally or remotely controlled.

The application discloses a kind of boiler water-cooled wall three-dimensional wall temperature coupling calculation methods, belong to boiler hydrodynamic calculation field, it is by constructing boiler and water-cooled wall model, carries out full furnace combustion numerical simulation and exports the heat flux density distribution of furnace water-cooled wall, convective heat transfer coefficient and working medium temperature;Again by for each calculation module design wall surface temperature distribution calculation method, can accurately calculate to obtain the water-cooled wall circumferential temperature field in calculation module, determine the water-cooled wall of calculation region and fire side temperature, back fire side temperature and pipe inner wall temperature, complete the calculation of water-cooled wall three-dimensional wall temperature.The boiler water-cooled wall three-dimensional wall temperature coupling calculation method in the application, its steps are simple, convenient to calculate, can accurately obtain the detailed distribution of water-cooled wall pipe wall temperature of boiler under different loads and water-cooled wall pipe circumferential temperature distribution, realize the accurate prediction of boiler heating surface wall temperature, provide basis for the optimization of heating surface, and provide guarantee for the safe operation of boiler.

The application discloses a kind of sealing high temperature sealing performance attenuation degree evaluation device and method, belong to composite material quality evaluation, high temperature sealing field, the device includes upper pressure head, lower fixture, force sensor, flame gun, baffle and thermocouple;The steps of the method include installing seal, using flame gun to make seal sample burn, establish the functional relationship between seal compression force and back fire side temperature, establish the correlation model between seal structure-compression force-high temperature sealing performance in the whole combustion process, to quantitatively evaluate the attenuation degree of sealing performance of seal.The application can more truly simulate the actual service condition of seal by in-situ experiment in actual high temperature, pressure head compression, pressure difference environment, accurately reflect the sealing performance attenuation condition of seal under high temperature condition, overcome the deficiency that actual service condition cannot be simulated in prior art.

A method (100) of control for preventing backfire of a fuel in internal combustion engines equipped with at least one injector per engine cylinder, the method comprising the following steps: - calculating the limits of a fuel injection as a function of the valve opening, limits within which backfire is prevented, - calculating the opening delay (OD) and the closing delay (CD) of an injector with respect to the electrical injection command signal, - correcting the electrical injection command signal in terms of advance and duration, - performing a redundant control of the end of injection in terms of electrical injection command signal.

The invention relates to the technical field of fire-fighting equipment, and provides a suspension type dry powder fire extinguishing device and a fire extinguishing method.The suspension type dry powder fire extinguishing device comprises a pressure-resistant container, an ignition mechanism, a first valve, a controller and a detector, and a containing cavity used for storing fire extinguishing dry powder is formed in the pressure-resistant container; a storage device for supplementing fire extinguishing dry powder is arranged on the pressure-resistant container; the plurality of ignition mechanisms are arranged at the top of the pressure-resistant container and are used for spraying the fire extinguishing dry powder in the accommodating cavity out of the pressure-resistant container after the ignition mechanisms are ignited; the first valve is arranged on the output pipe of the pressure container; the controller is electrically connected with the ignition mechanism and the first valve; the detector is used for feeding back fire extinguishing information to the controller and starting the ignition mechanism. The ignition mechanisms can be started at equal time intervals through the controller, and the effect of sequential ignition is achieved; or, the ignition mechanism can be started in order through continuous detection of the detector, so that continuous spraying of the fire extinguishing dry powder and high fire source restraining capacity are kept.

1. The name of the design product: the furnace mouth wind cover. 2. The use of the design product: installed on the furnace mouth of the boiler, used for conveying oxygen in the boiler and preventing back smoke and back fire. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.