Accumulated liquid separation buffer device and metering pressure tapping pipeline

The utility model relates to the field of natural gas gathering and transportation metering devices, in particular to an accumulated liquid separating and buffering device and a metering pressure tapping pipeline, the accumulated liquid separating and buffering device comprises a buffering container and a separating and buffering core, a buffering chamber is arranged in the buffering container, one end of the separating and buffering core is located in the buffering chamber, and the other end of the separating and buffering core extends out of the buffering chamber. The separation buffer core is detachably connected with the buffer container, the separation buffer core comprises a flow guide channel, the separation buffer core is provided with a plurality of buffer grooves which are communicated with the flow guide channel and the buffer chamber, the buffer chamber is provided with a through hole which is communicated with the external space, and the buffer grooves and the through hole are arranged in a stagg