Water spraying device additionally arranged on helicopter

The utility model discloses a water spraying device additionally arranged on a helicopter, which comprises a high-pressure pump arranged at the bottom of the helicopter and a water gun communicated with the high-pressure pump, the water gun comprises a gun barrel and a nozzle, one end of the gun barrel is communicated with the high-pressure pump, and the nozzle is arranged at the other end of thegun barrel; the gun barrel is a multi-stage reducing flow guide pipe, namely, the diameter of an inner pipe of the multi-stage reducing flow guide pipe is gradually decreased in the axial direction ofthe gun barrel from one end of the gun barrel to the nozzle. The high-rise fire extinguishing device can achieve the effects of high water pressure and long range, and meets the requirement of high-rise fire extinguishing. 本实用新型公开了一种加装在直升机上的喷水装置，包括设置在直升机底部的高压泵和与高压泵连通的水枪，所述水枪包括枪管和喷嘴，枪管的一端与高压泵连通，喷嘴设置在枪管的另外一端上；所述枪管为多级变径导流管，即沿枪管轴向，从枪管的一端往喷嘴方向，多级变径导流管的内管直径逐渐变小。本实用新型能达到高水压、远射程的效果，满足了高楼灭火的需求。