Highly practical cryovial

A highly practical cryovial, comprising an inner tube (1), a transparent outer tube (2), a limit snap ring (17), a liquid control mechanism arranged inside the inner tube (1), a protection mechanism arranged on the transparent outer tube (2), and a sealed liquid taking mechanism arranged on the inner tube (1), wherein the inner tube (1) and the transparent outer tube (2) are of a cylindrical structure and internally hollow;

• the liquid control mechanism comprises a push rod (9) and a piston block (10), wherein the piston block (10) is movably connected with the inner tube (1), first spiral holes of the same size are formed at the corresponding positions of the bottom ends of the inner tube (1) and the transparent outer tube (2), and the push rod (9) is movably connected with the two first spiral holes respectively;
• the protection mechanism comprises an anti-slip pad (12) and a clamping pad (23), wherein one end of the anti-slip pad (12) is movably connected with an outer side wall of the transparent outer tube (2) and the other end thereof is movably connected with one side of the clamping pad (23) close to the inner tube (1), a first mounting hole is formed at a central position inside the limit snap ring (17), and an outer side wall of the inner tube (1) is connected with the first mounting hole;
• and the sealed liquid taking mechanism comprises a sealing cover (18), wherein the sealing cover (18) is of a cylindrical structure, internally hollow, and movably connected with the inner tube (1), and a lower part of the sealing cover (18) is movably connected with an upper part of the limit snap ring (17).