Intermediate frequency induction furnace composition

1. Medium frequency induction furnace body part

(1) The induction coil of the induction furnace: The induction coil is the heart of the induction furnace. The electromagnetic energy is converted into heat energy through the induction coil to melt the metal charge in the crucible. High-strength insulating paint is sprayed and wrapped with insulating tape. Refractory cement is also applied between the turns of the intermediate frequency furnace. There are water cooling rings above and below the induction coil.

(2) Magnetic yoke of induction furnace: The magnetic yoke is made of high-quality silicon steel sheets, which are distributed around the induction coil, and play the role of supporting the skeleton.

(3) Water-cooled cables for induction furnaces: Because of the frequent tipping of the furnace, the flexible wires of the water-cooled cables are easily broken and the connecting bolts at the terminals are loose, which may cause current imbalances. Generally, the life of the water-cooled cables is confirmed according to the number of tipping furnaces. It is three years. It needs to be replaced after three years. If the bolt changes color, it needs to be updated and tightened in time.

(4) The service life of the induction furnace lining and reducing the frequency of furnace construction are appropriately important for reducing costs.

(5) The crucible leakage furnace alarm device of the induction furnace: in order to ensure safe production, avoid the occurrence and expansion of furnace leakage accidents, help to determine the use status of the furnace lining, and extend the furnace age, it is necessary to set up a crucible furnace leakage alarm system. Generally, a DC alarm device is used, and the bottom electrode (the first electrode) of the stainless steel wire in contact with the molten iron and the side electrode (the second electrode) of the stainless steel plate (mesh) between the furnace lining induction coils are installed separately.

2. The hydraulic system of the intermediate frequency induction furnace is composed of hydraulic device, console, hydraulic cylinder for tilting furnace, hydraulic cylinder for furnace cover, etc. Regularly check whether there is leakage at each seal of the hydraulic system, if found, replace the sealing ring, and add lubricating oil to each rolling part regularly (the rolling self-smooth spherical bearing of the tilting furnace needs to be added to the old one when adding lubricating grease. until the oil overflows), otherwise it is easy to cause damage.

3. The water cooling system of the intermediate frequency induction furnace ensures the quality of the cooling water and regularly checks whether there is scale. If there is scale, it should be cleaned immediately to ensure the cooling effect. Generally, the cooling water quality requirements of power frequency furnaces: pH value is 6~9, hardness <10mg equivalent/L, total solid content does not exceed 250mg/L, cooling water temperature rise <25℃; the quality of cooling water used for intermediate frequency power supply : pH value is 7~8, hardness <1.5mg equivalent/L, suspended solids: 50mg/L, resistivity>4000Ω·cm. The circulating water in the circulating water pool should be tested regularly. When the hardness of the circulating water exceeds 2 mg equivalent/L, the circulating water in the system should be emptied and replaced from scratch. The cooling water tower should be regularly drained and replaced with new soft water to prevent the pipeline and nozzle from being blocked, which will affect the cooling effect and the service life of the furnace lining.

4. The main circuit and induction coil of the electric control system of the intermediate frequency induction furnace should be regularly cleaned of dust on the surface. The conductive metal dust in the foundry workshop and the iron beans splashed during iron casting fall on the surface of the main copper bar or induction coil, which will cause its insulation capacity to decline. The formation of discharge and ignition is very easy to cause damage to electrical components. Blow off with compressed air that does not contain water. The connection screws of the main circuit copper bars also need to be checked and tightened regularly, otherwise, the addition of the touch resistance will generate a large amount of heat at the connection and cause the insulating material to carbonize and cause leakage.