Automatic alarm device for blockage of vertical drainage pipe

The utility model provides an automatic alarm device for blockage of a drainage vertical pipe, and relates to the field of drainage. The automatic alarm device comprises a vertical pipe, one side of the vertical pipe is fixedly connected with an inclined pipe, one end of the inclined pipe is fixedly connected with a three-way valve, one side of the three-way valve is fixedly connected with a U-shaped pipe, one end of the U-shaped pipe is fixedly connected with a bent pipe, and the bottom of the bent pipe is fixedly connected with an electromagnetic valve. According to the drainage riser blockage automatic alarm device, sewage is filtered and purified in the filter box and then enters the hydraulic alarm bell through the purified water pipe, so that the hydraulic alarm bell gives an alarm, when the hydraulic alarm bell works, the electromagnetic valve is opened, the sewage in the riser can be discharged through the inclined pipe, the three-way valve, the U-shaped pipe, the bent pipe and the electromagnetic val