Valve mechanical linkage system

A mechanical linkage system for valves, the valves comprising a main valve and an auxiliary valve, wherein

• the system comprises a first transmission mechanism and a second transmission mechanism;
• the first transmission mechanism is connected to the main valve, and is configured to convert up-down reciprocating motion of the main valve into rotary reciprocating motion;
• the first transmission mechanism and the second transmission mechanism are connected by a coupling, and a rotary force of the rotary reciprocating motion is transferred to the second transmission mechanism through the coupling;
• and
• the second transmission mechanism is connected with the auxiliary valve, and control of opening and closing of the auxiliary valve is achieved by converting the rotary reciprocating motion into the up-down reciprocating motion;
• the second transmission mechanism is a cam, and
• the cam is fixedly connected to a bracket of the auxiliary valve, a groove is provided on the cam, and a protruding roller on a moving assembly of the auxiliary valve is embedded in the groove to achieve up-down reciprocating motion of the moving assembly of the auxiliary valve along with rotation of the cam.