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

The invention belongs to the technical field of explosive atmosphere test technologies, and particularly relates to an explosive atmosphere test box sampling container exhaust pipeline guiding type automatic pressure relief device which comprises a guiding shaft sleeve, a spring and a piston rod, the piston rod and the spring are located in the guiding shaft sleeve, the piston rod is sleeved with the spring, and the piston rod is sleeved with the spring. 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 exhaust pipeline. According t