Pre-acting system spraying device with drainage mechanism

The utility model relates to the technical field of fire-fighting equipment. The pre-acting system spraying device with the drainage mechanism comprises a main pipeline and a branch pipeline communicated with the main pipeline, the branch pipeline comprises a connecting pipe communicated with the main pipeline and a water supply pipe connected to the end, away from the main pipeline, of the connecting pipe, and a water outlet valve is installed on the water supply pipe. The utility model has the effect of discharging residual fire-fighting water in the branch pipeline. 本实用新型涉及消防设施的技术领域，尤其是涉及一种带有排水机构的预作用系统喷淋装置，其包括主管道以及与主管道连通的支管道，所述支管道包括与主管道连通的连接管以及连接在连接管远离主管道一端的供水管，所述供水管上安装有出水阀。本实用新型具排出支管道残留的消防用水的效果。