Pipe network non-negative pressure direct drinking water supply device according to quality

The utility model relates to a pipe network non-negative pressure direct drinking water supply device according to quality, which comprises a municipal water inlet main pipe, a non-negative pressure regulator, a control cabinet, a boosting water pump and a water outlet main pipe; the municipal water inlet main pipe passes through a check valve, a gate valve, the non-negative pressure regulator and the boosting water pump and is divided into two branches: one branch is a domestic water pipe, and the other branch is serially connected with an active carbon filter, an ultra-filtration membrane device, an electromagnetic valve and an ultraviolet sterilizer and then is connected with a direct drinking water pipe; a flushing water return pipe; and the electromagnetic valve is arranged on the flushing water return pipe. The pipe network non-negative pressure direct drinking water supply device has the advantages of compact structure, low price, no secondary pollution, wide scope of application, reliable performance, high automation, one-time investment and lifelong benefit, and is applicable to occasions which adopt secondary pressurization and water supply, such as office buildings, residential communities, institutions as well as town and urban water supply terminals; and the equipment size is flexible, from urban communities to unit households.