Slowly-closed pneumatic control locking solenoid valve

The pneumatic control locking electromagnetic valve comprises a shell and a main valve element, an electromagnet is arranged at the upper end of the shell, a main valve seat is arranged at the lower end of the shell, an upper auxiliary valve seat is arranged in the middle of the shell, the main valve element is installed between the upper auxiliary valve seat and the main valve seat, a buffering closing structure is connected between the lower end of the main valve element and the upper end of the main valve seat, and an annular cavity is formed between the upper portion of the side wall of the main valve element and the inner wall of the shell. A first containing cavity is formed between the lower end of the side wall of the main valve element and the inner wall of the shell, a medium inlet is formed in the side wall of the shell, a medium channel is formed in the lower end of the main valve element, an assembly hole is formed in the upper end of the main valve element in a concave mode, a lower auxiliary va