Steam pipeline pressure relief device

The utility model discloses a steam pipeline pressure relief device which comprises a device body arranged between a drain pipe and a blow-off pipe and communicated with the drain pipe and the blow-off pipe, and a plurality of flow guide plates arranged in the device body and used for steam flow guide. Steam or condensate water in a steam pipe network firstly enters the device body after passing through the drain pipe, pressure relief is carried out in the device body through the multiple guide plates, and after the pressure and the temperature are gradually reduced, the steam or the condensate water is discharged from the blow-off pipe. Therefore, compared with the prior art, the pressure relief device is arranged on the steam pipeline, so that the phenomena of pipeline vibration, water vapor pollution and the like caused by large-area outward spraying of steam from the drain port of the drain pipe can be effectively avoided, the damage to the pipeline is greatly reduced, and the personal safety of field per