1. Medium frequency induction heating equipment, according to the length of the heated workpiece and the diameter of the workpiece, the sensor has a length and a short. In general, however, medium frequency induction heating equipment is generally long (referring to heating the axial direction of the workpiece), the purpose of which is to ensure the heating temperature and the temperature difference between the interior and the surface under the same heating time.
2. There are basically two types of lining assembly for medium frequency induction heating equipment. One is knotted furnace lining and the other is assembled furnace lining.
3. Whether it is knotted furnace lining or assembled furnace lining, it will change under long-term work at high temperature (mainly thermal expansion and contraction and oxidation). If used improperly, there will also be heating material collision and extrusion lining. Therefore, the use of the lining has a certain period of time.
4. Once the intermediate frequency induction heating furnace lining cracks, if it is knotted furnace lining, the crack must be filled with the blasting material if the crack does not exceed 2mm. If the crack exceeds 2mm, the lining must be re-knotted; if it is assembled lining, it must be replaced. Therefore, the user must take necessary measures in the actual situation, do not act rashly, cause unnecessary consequences, burn out the medium frequency induction heating equipment.
5. During the heating process of the intermediate frequency sensor, a large amount of oxide scale that has fallen off due to heating of the workpiece will accumulate in the intermediate frequency sensor. If the lining is damaged, or cracks, cracks, if not cleaned in time, one is easy to fire, causing over-current protection of the intermediate frequency power supply, and second, it is easy to break through the inductor coil and cause short circuit between the inductors. Therefore, the scale in the medium frequency inductor furnace is cleaned at least once per shift (8 hours).
6. The coil of the medium frequency induction heating device is usually water-passed, and the heat generated by it is mainly carried away by water. Therefore, there must be sufficient water flow and water pressure to ensure that the copper pipe of the medium frequency induction heating device flows through the necessary amount of water. Therefore, the working pressure of the cooling water should be not less than 0.2 to 0.3 MPa, the inlet water temperature is less than 35 ° C, and the outlet water temperature is less than 55 ° C. If the water pressure is not enough, the coil of the intermediate frequency induction heating device will be vaporized and heated. If not found in time, the copper tube will rupture and the water will overflow. The sensor is in high temperature operation. At this time, it is very likely that an explosion will occur. Therefore, it is extremely important to sense the cooling water.
7. Newly manufactured medium frequency induction heating equipment that has just been put into production. After the power is turned on, it must be baked at low power (generally around 30kw), and the workpiece is heated in the induction furnace for about 2 hours. The reason is that the manufacturer must pass water in the sensor during the debugging process. After the debugging, there must be residual water in the sensor tube. Especially in the winter, it is possible to form very thin ice. Therefore, the sensor must be tidal. In order to ensure the service life of the lining, the newly-produced intermediate frequency heater must be baked at low power, and then start production at high power after 2 hours.
8. The water-cooled guide rail in the medium frequency induction heating device is actually the work track for heating the workpiece, and it always works at high temperature. If the water is not enough or the water pressure is not enough, gasification, redness, deformation, and heating of the workpiece will not pass through the sensor. Therefore, water cooling of water-cooled guide rails is also extremely important.
9. The water-cooled guide rail is worn during use. Generally, the wall thickness of the water-cooled guide rail is 2 mm. Therefore, the use of water-cooled guide rails has a certain period of time. If it is too worn, it must be replaced. Otherwise, if water leaks, it will cause the lining to be quenched, which directly affects the use of the lining.
10. Dry rails (not water), if worn, deformed, must be replaced, and the lining is prohibited as a guide for heating the workpiece. In short, the diathermy sensor must also be inspected while viewing during use. If problems are found, they should be dealt with in a timely manner. Only in this way can the sensor be used normally without affecting production.
