Plug the pipe's pneumatic transport sample shell device not

The utility model discloses a plug the pipe's pneumatic transport sample shell device not belongs to the supporting device of a pneumatic transport sample system, including the shell body, box cover body is installed to the one end of shell body, and box cover body's outside profile is the sphere, and box cover body's the outside still is provided with the ring channel, and the both sides in the ring channel still all are equipped with the draw -in groove, and still install annular spring in the ring channel, still install the steel ball on the spring, and spring and the equal block of steel ball are in the draw -in groove. Through with the ring spring to installing in the ring channel in the box cover body outside, the steel ball that cooperates its upper portion installation, the installation power of pretightning force adjustment box cover body on the shell body of accessible spring, make the shell device be difficult for throwing off when using, and the outside profile through withbox cover body sets up t