Connecting rod of butterfly valve is a form of structure, mainly used in smelting blast furnace hot blast stove system and preheating furnace system, as the flue valve, valve, cut-off valve, gas combustion on the fuel air cut-off Industrial Valves, the cold wind valve etc, to cut off the role in the system. 1 structure connecting rod butterfly Industrial Valves is mainly composed of drive device, in body, shaft, rod, valve plate, shaft end seal, shaft end supports and other components. Working principle of the connecting rod 2 main technical focus bar system in the middle part of the butterfly valve, the connecting rod can be respectively defined as active rod, a fixed pole, auxiliary pole. As shown in figure 2 connecting rod in butterfly valve rod structure, through active rod end key or pin connected to the spindle, the other end is connected to the valve plate fixed bar through the main shaft and body, fixed in the valve plate of the entire movement process have the effect of fixed support, auxiliary rod end connected to the fixed rod, the other end connected to the valve plate, in the process of the movement of the valve plate have the effect of realizing trajectory. Connecting rod rod part of the butterfly valve can be thought of as a four bar linkage, this valve plate in open moment can realize a vertical upward movement, make the sealing face of valve plate and Industrial Valves body quickly release as shown in figure connecting rod butterfly valve board running track, as shown in the figure to make the two seal face no relative friction, ensure the service life of the valve.
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