Air pipe connecting device for denitrification deep-bed filter

The invention discloses a gas pipe connecting device for a denitrification deep-bed filter tank, and relates to the technical field of pipe fitting connection. Comprising a right-angle pipe, a connecting pipe and a fastening bolt, an annular groove is formed in the outer side of one end of the right-angle pipe, the inner wall of the annular groove is sleeved with a fastening ring, the two ends of the fastening ring are connected through the fastening bolt, a first connecting piece is arranged at one end of the connecting pipe, and a second connecting assembly is arranged on the outer side of one end of the right-angle pipe. According to the air pipe connecting device for the denitrification deep-bed filter tank, one end of the connecting end is provided with the annular slot for inserting the connecting sleeve, and when the outer side of the connecting sleeve extrudes the inclined surface of the spring buckle, the spring buckle shrinks along the hole formed in the outer side of the connecting end and compress