Lining silicon nitride ceramic sliding-resistant plate valve convenient for cylinder protection

The utility model discloses a lining silicon nitride ceramic slide-resistant plate valve convenient for cylinder protection, which comprises a body, the body adopts surface sealing, the top surface of the body is connected with a connector, and the surface of the connector is provided with a cylinder; the protective cover is connected to the surface of the air cylinder in a sleeving mode, a guide column is perpendicularly and fixedly connected to the surface of one side of the protective cover, a guide groove matched with the guide column in size is connected to the surface of the guide column, the guide column and the guide groove form an embedded structure, and a T-shaped mounting block is arranged on one side of the guide column. According to the lining silicon nitride ceramic sliding-resistant plate valve convenient to protect the air cylinder, an operator sleeves the surface of the air cylinder with a protective cover, a guide column is driven to move in a guide groove, then the guide column and the guid