| 摘要 |
The present invention relates to a fire prevention device for an underground electric duct or a common duct. A fire department connection (210) is installed on the ground to suppress fire on the underground electric duct or the common duct, and a foam head assembly (220) and a foam fire extinguishing agent storage tank (250) are installed on the underground common duct. The fire department connection (210) and the foam head assembly (220) are connected with a pipe (230), and an air foam mixer (100) absorbing and mixing chemicals of the foam extinguishing agent storage tank (250) is included on one side of the pipe (230). |
