The utility model relates to the technical field of heavy mechanical valves, in particular to a self-lubricating heavy
mechanical valve which comprises a heavy
mechanical valve body and an
oil tank, a
valve seat is fixedly connected to the heavy
mechanical valve body, a valve rod is rotatably mounted on the
valve seat, and a round seat communicated with the
oil tank is fixedly connected to the lower side of the
oil tank. One side of the round seat is fixedly connected with an oil outlet
pipe communicated with the round seat; the oil discharging mechanism comprises a
piston located in the round seat, the interior of the round seat is slidably connected with a first guide rod, and one side of the first guide rod is fixedly connected with the
piston. The
cam jacks up the rolling wheel to drive the
piston to move, automatic conveying of lubricating oil is achieved, the annular
sponge can evenly infiltrate the valve rod, surrounding type
lubrication is formed, and the service life of the valve rod is prolonged. Friction and oxidation
corrosion of the valve rod are effectively reduced, the
lubrication process can be rapidly started and stopped through the linkage design of the operating hand wheel and the clamping rod, it is guaranteed that
lubrication is precise and controllable, waste of lubricating oil is avoided, and the service life of the valve rod is prolonged.