Advantages of triple eccentric butterfly valve plasma surfacing machine

       An automatic valve plasma surfacing machine designed for surfacing nickel-, cobalt- and iron-based alloys for medium and small steel triple-eccentric butterfly valves. This model adopts powder plasma surfacing with alloy powder as filler, which has outstanding advantages such as stable process, low alloy dilution rate, uniform metallographic structure, small fluctuation of surfacing layer hardness, and good surfacing layer quality.



For the sealing surface of the steel triple eccentric butterfly valve, the automatic surfacing welding is adopted, which has the outstanding advantages of good quality, high efficiency, material saving and low labor intensity compared with manual welding.



The triple eccentric butterfly valve plasma surfacing machine consists of a medium-sized vertical manipulator, a medium-sized positioner, a surfacing head (composed of a powder feeder, a plasma torch, etc.), a surfacing power source, a PLC control system, and a refrigerated heat exchange booster cycle Water supply machine, protective device and other parts. The control cabinet panel is the operation interface, which consists of a touch screen and a small number of control switches.



Because the shape of the surfacing surface of the valve seat of the triple eccentric butterfly valve is not a standard circle, and the welding surface must be carried out in a horizontal position, so the welding state must be adjusted during the surfacing process, including the inclination angle of the positioner and the welding torch. Feed distance, lifting height of welding torch, etc. When implementing automatic surfacing, these parameters must be automatically adjusted following the rotation of the workpiece, always keep the surfacing surface in a horizontal state and the axial displacement of the welding torch within the position of the welding bead, and the height of the welding torch from the surfacing surface is consistent. It is a difficult problem for the control system of this machine to realize such automatic follow-up adjustment. Wuhan Gaoli Thermal Spray Engineering Co., Ltd. has developed a follow-up system for the welding torch to follow the track of the weld bead, which has solved this problem satisfactorily.