Guiding type automatic pressure relief device for exhaust pipeline of sampling container of explosive atmosphere test box

The utility model belongs to the technical field of explosive atmosphere tests, and particularly relates to a guiding type automatic pressure relief device for an exhaust pipeline of a sampling container of an explosive atmosphere test box, which comprises a guiding shaft sleeve, a spring and a piston rod, the piston rod and the spring are respectively positioned in the guiding shaft sleeve, the spring is sleeved on the piston rod, and the piston rod is sleeved on the piston rod. One end of the piston rod is connected with the piston, the other end of the piston rod is connected with the side wall of the right side of the guide shaft sleeve, a pressure relief strip-shaped hole is formed in the side portion of the guide shaft sleeve, an opening is formed in one end of the guide shaft sleeve, and an outlet flange of a sampling container exhaust pipeline is inserted into the guide shaft sleeve from the opening of the guide shaft sleeve. The piston is in contact with an outlet flange of the sampling container exh