The utility model discloses a fire extinguishing device for a mine. The fire extinguishing device comprises a frame structure, a
liquid storage tank, a bracket, a bottom spraying arm
assembly and a central sleeve, an electric walking wheel
assembly is installed at the bottom of the frame structure, and a
control system is installed on the frame structure. The
liquid storage tank is mounted at the top of the frame structure, and a liquid pumping
assembly is mounted at the bottom of the
liquid storage tank; the support is installed on the side wall of the frame structure, and two symmetrically-arranged translation assemblies are installed on the support. The bottom spraying arm assembly is fixedly installed at the bottom of the support and communicates with the liquid pumping assembly. The center of the center sleeve is fixedly installed on the support, the center sleeve is communicated with the liquid pumping assembly, the two sides of the center sleeve are connected with the extended spraying arm assemblies in a sliding mode, and the extended spraying arm assemblies are communicated with the center sleeve. The position of the spraying arm assembly can be flexibly adjusted and extended, so that the spraying range and the fire extinguishing coverage range are expanded, fire extinguishing in a
large range in a mine is achieved, and the fire extinguishing effect and efficiency are improved.