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How to ensure the service life of butterfly valve longer
Butterfly valve butterfly valve is a structural form, mainly used in smelting furnace blast furnace system and preheating furnace system, as a flue valve, gas cut off valve, gas combustion valve, combustion air cut off valve, cold air valve, etc. used in the system In the cut off. 1 Structure The connecting rod butterfly valve is mainly composed of the driving device, valve body, spindle, rod system, valve plate, shaft end seal, shaft end support and other components. 2 Working principle The main technology of connecting rod butterfly valve is concentrated in the middle part of the rod, the connecting rod can be defined as active rod, fixed rod, auxiliary rod. As shown in the connecting rod and rod structure of the connecting rod of Fig. 2, one end of the active rod is connected with the main shaft by a key or a pin, the other end is connected with the valve plate, the fixing rod is fixed by the main shaft and the valve body, To the role of fixed support, auxiliary rod connected with the fixed rod at one end and the other end connected with the valve plate, valve plate in the course of movement to achieve the role of trajectory. Connecting rod butterfly valve rod part can be seen as a four-bar linkage, so that the valve plate at the moment of opening can be achieved a vertical upward movement, the valve plate, the valve body sealing surface quickly disengaged Figure connecting rod valve Plate trajectory map shown, so that the two sealing surface without friction, to ensure the service life of the valve.