Unsealing and sealing device for sampling and collecting barrel

The invention discloses an uncapping device for a sampling and collecting barrel, which comprises an uncapping mechanism, an upper mushroom head assembly is arranged in an accommodating space formed by a gripper of the uncapping mechanism, and the upper mushroom head assembly is used for sending a switch lock control signal to a lower mushroom head assembly after the upper mushroom head assembly is successfully butted with the lower mushroom head assembly; the lower mushroom head assembly is arranged on a cover body of the unsealing cover mechanism and used for receiving a lock opening and closing control signal sent by the upper mushroom head assembly to open and close the cover body after the lower mushroom head assembly is successfully in butt joint with the upper mushroom head assembly. According to the uncapping device, the sealing performance of the collecting barrel after capping is good, water loss is reduced, meanwhile, uncapping can be achieved only when the upper mushroom head and the lower mushroo