Pump mechanical seal circulating water blowdown device

The utility model relates to a mechanical seal circulating water blowdown device for a pump. The mechanical seal circulating water blowdown device comprises a water supply main pipe, a water return main pipe, a pump seal water supply pipe, a pump seal water outlet pipe and a pump water supply blowdown pipe, the pump water supply blow-off pipe is perpendicular to the ground, and a blow-off port is formed in the bottom of the pump water supply blow The pump water supply and blow-off pipe is communicated with the water supply main pipe and is connected below the water supply main pipe, the pump sealing water supply pipe is connected between the pump water supply and blow-off pipe and a mechanical seal of the pump, and the connection position of the pump sealing water supply pipe and the pump water supply and blow-off pipe is higher than the blow-off port; the pump sealing water outlet pipe is communicated to the water return main pipe; solid-phase objects in mechanical seal water can be effectively precipitated,