Abstract: A drainage type forest fire fighting robot was designed for the problem that fire extinguishing equipment cannot be fully adapted to the forest fire extinguishing conditions in China. It was modeled in three dimensions by Solidworks, and the fluid simulation of the diversion duct was carried out by Fluent to analyze the influence of the diameter D3 of its third fire extinguishing wind cylinder, the nozzle position S0 and the convergence angle θ1 of the convergence chamber on the fire extinguishing performance; the influence of the interaction of the three on the fire extinguishing performance was further analyzed by ANSYS and MATLAB software, and performance comparison test was conducted between the prototype and the 6MF-32 portable wind-operated fire fighting robot. The results show that the optimal solution of wind cylinder size is S0=-20 mm, D3=110 mm and θ1=15°, and the fire extinguishing efficiency of this design is higher compared with 6MF-32 under the optimal structure parameters, which helps forest firefighting better.

Key words: forest firefighting, drainage type structure, wind firefighting robot, optimized design