HAND COMBINED FIRE-FIGHTING NOZZLE

摘要

The invention relates to the fire-fighting equipment, in particular, to hand nozzles for fire extinguishing, and is directed to provision of the possibility of delivery of a solid or sprayed with a varying angle water jet or creation of a water curtain with maximum range and flow rate of the fire extinguishing agent at minimum hydraulic losses during fire extinguishing. The combined hand fire-fighting nozzle includes a housing with an adapter and a connecting head for the fire hose, a shutoff device, a device to regulate the solution flow to the nozzle, a jet forming device including a mouthpiece with a deflector, wherein, according to the invention, the internal surface of the mouthpiece deflector is made in the form of a cubic parabola, the current radius of the curvilinear part of the deflector being determined by the equationwhere ris current radius of the curvilinear part of the deflector, mm; lis current length of the curvilinear part of the deflector, mm; b is deflector thickness, mm; c is parameter depending on volume flow rate of the nozzle and, for hand nozzles, is in a range of 1000-2000 mm.