Automatic air-pressure interlocking device of high-pressure sterilizer

The utility model provides an automatic air-pressure interlocking device of a high-pressure sterilizer, which comprises an inner stop block, an inserted bar, a piston, a reset spring, a spring catch, an ejector rob and a return pin, wherein the inner stop block is arranged on one side of an upper head on the outer surface of a fixing plate; one end of a cross beam is fixed, and the other end of the cross beam is movably inserted in the inner stop block through the inserted bar arranged in the cross beam; the return pin is fixed in the inner stop block; the ejector rod penetrates through the return pin and is arranged in the inner stop block; a groove is formed in the inserted end of the inserted rod; one end of the ejector rod is contacted with the groove, and the other end of the ejector rod is connected with the piston; the spring catch is arranged at the end of the ejector rod, which is connected with the piston; one end of the reset spring is fixed on the spring catch, and the other end of the reset spring is contacted with the return pin; and a clamp spring is arranged on the ejector pin and located in the return pin. The automatic air-pressure interlocking device is simple in structure and convenient to operate, can avoid potential safety hazards caused when the upper head is forced open in a low-pressure state, and provides a guarantee for the safety of operating personnel.