Magnetic lock gate valve with novel structure

A magnetic lock gate valve of a novel structure comprises a valve body and a magnetic key, a valve bonnet is connected to the valve body, a valve cavity is formed between the valve body and the valve bonnet, a valve rod is arranged in the valve cavity, the lower end of the valve rod is connected with a valve plate through threads, the upper end of the valve bonnet is connected with a lock shell, and an annular locking groove and a movable groove are machined in the inner wall of the lock shell. A linkage lock cylinder and a pressing spring supporting the linkage lock cylinder are arranged in the lock head shell, the linkage lock cylinder comprises a lock cylinder body, an upper connector is formed in the upper end of the lock cylinder body, a lower connector is formed in the lower end of the lock cylinder body, first magnetic steel and a lock cylinder spring are arranged in the lock cylinder body, and the magnetic key comprises an unlocking rod and an unlocking sleeve arranged outside the unlocking rod in a s