The article discusses the mathematical model of a combined hydraulic system fire protection tank with a stationary roof. Such a hydraulic system for tanks in the group being powered from a common manifold, allows as sectional water tank walls depending on the scenario of a fire and to supply water to the flame-arrester device with the aim of improving their fire resistance and to prevent penetration of flame in the breathing valves or in the volume of the tank. For solving problems of analysis and synthesis of such combined hydraulic system provides relevant mathematical model based on equations of hydraulic balance .
stationary roof reservoir, fire, irrigation, breathing valves, fire arrester device
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