The current density of the intermediate frequency heating device is high, and it is necessary to use a shaped copper tube to prepare a coil of various shapes, copper pipe water cooled, and there is a temperature stove lining between the workpiece and the coil, and it is assembled together.
(1) The copper tube must be composed of high quality copper, the electrically conductive performance is excellent, the smaller the impurities, the smaller is soft, and it is not easy to break.
(2) The refractory furnace lining is usually composed of quartz sand, the higher the AL203 content, the higher the temperature resistance, the temperature resistance is good, the heat conductivity is poor, the thermal efficiency is high, the temperature resistance is good, the furnace lining thickness can be thin, Increase electric efficiency, the comprehensive efficiency is also high. A very important factor in small diameter energy consumption is that the furnace lining cannot be made very thin. The workpiece that heats different diameters in the same induction furnace is always low in diameter, and the diameter small energy is high. .
(3) The end plate of the intermediate frequency induction heating device is copper, mainly to prevent electric scattering, and open the losses of the copper end plate.
(4) The structure has flowing through the coil and workpiece due to the current, and therefore, the electric power of them is quite large, and the furnace lining of the workpiece is moved in the furnace liner on the coil, so that the coil turns and turns must be fastened between the coils and turns , Prevent short-circuit between movement and coils, this fastening must be firm, otherwise the low frequency vibration causes noise, so the coil turns to insulate the fastening, and must be clamped with the end plate to fix, like a complete solid. It is often used to heat the coil copper pipe and other insulating composite belt, and the coil is treated with a coil, and the coil is turned close, and there is no low frequency vibration. The smaller the turns, the higher the efficiency.
(5) The waterway of the coil must have enough water lines, and the water flows into turbulence in the water pipe. The waterway should not have a right angle, which will reduce the flow of water flow and speed, reduce the cooling effect. The judgment method has a certain water temperature in each branch water, and the water temperature per flow rate is similar. If the water temperature is high, there is impurities in the solder slag or operation, so the induction furnace is to perform temperature monitoring and control over each road. The water temperature of each road is controlled at 50 ° C, and the high temperature cooling water will greatly reduce the cooling effect in the side of the copper pipe. The high temperature is fouling, and the final furnace coil is over temperature.
(6) The furnace lining material should prevent falling and cracking, the cause of the raw material is not yaw, the furnace lining material is generally refractory cement, once the cement is marked, the mold is a powder, and it is devastated. The process is not in place, the refractory cement is similar to ordinary construction cement, to be maintained, time is not small, this maintenance is maintenance in the moisture environment, maintenance time is about 48 hours, can not have dropping, not enough maintenance time is not enough, will inevitably crack, The furnace is dry and not baked. It is important to have a long life, and the furnace is dry is very important. The core is slow drying, drying at a low temperature for a long time 36h, the initial heating is very slow.
(7) The welding of the splitting waterway branch of each branch of the intermediate frequency induction heating equipment is silver-copper solder, ensuring that the welding is secured and oozing, the waterway is a rubber tube, no plastic tube, the plastic tube sealing performance is poor.
(8) Generally equipped with a water guide rail, the guide rail life is generally dependent on the surfacing material and the thickness. It is not recommended to use spray-resistant to wear-resistant material because the spray resistant powder formulation is usually a single stainless steel, not as high as high temperature wear-resistant electrodes, and the formulation component of the heap electrode.