Induction Furnace Repair

Induction Furnace Repair

Intermediate frequency furnace inductor fault repair method

Today, the editor of Luoyang Wanfeng Industrial Furnace will introduce the problem of sensor fault maintenance. The inductor in the intermediate frequency furnace is an extremely important part, so it is extremely important to master the maintenance and repair of the inductor.

Maintenance time of induction coil of intermediate frequency electric furnace

1. Once a month, check whether the coil insulation of the intermediate frequency furnace is raised or partially carbonized, and wash it with workshop air.

2. Check once a month whether there are attachments on the surface, and blow it with compressed air in the workshop.

3. Check whether the intermediate frequency furnace coil insulation board is extended in the repair room every month.

4. Check the assembly screws of the lifting coil every three months to tighten the screws.

5. Weekly visual inspection for loose helical compression springs

6. Check whether there is water leakage at the joint of the rubber tube every day.

7. Check the rubber tube for scratches once a week.

8. Remove the rubber hose, and check the corrosion resistance of the anti-rust joint at the end of the coil ("anti-corrosion pipe") after half a year. When the connector is rusted, it should be replaced in time, usually every two years.

9. Under the conditions of rated metal solution and rated power, record the temperature and minimum value of each branch of the coil with an infrared thermometer every day.

10. Compressed air is blown out of the coil every day and discharged from the surface of the dust-splashing solution. 11. The induction coil water pipe is pickled every two years.

The cause of the failure of the induction coil of the intermediate frequency electric furnace

1. This kind of failure is especially prone to occur in small intermediate frequency furnaces. Due to the small furnace, thermal stress causes deformation during operation, resulting in an inter-turn short circuit. The fault indicates that the current is large and the operating frequency is higher than normal.

2. The induction coil leaks, which can cause sparks between the coils, and the importance of repairing running welding in time.

3. The steel sticks to the induction coil of the intermediate frequency furnace, and the steel slag is hot and red, which will cause the copper tube to burn. It must be cleaned in time.

Precautions for maintenance of induction coil of intermediate frequency electric furnace

1. The operating frequency of the induction coil in the intermediate frequency furnace is relatively poor, especially the casting and smelting parts, especially dust or iron filings.

Due to the falling off of iron filings or slag on the coil of the intermediate frequency furnace or the carbonization of the surface of the insulating bakelite, a short circuit between turns is caused, which causes fire between the turns, and the copper tube of the coil breaks, resulting in failure of the intermediate frequency furnace.

Therefore, use the intermediate frequency furnace to clean the site regularly and concentrate on the coils to avoid wasting iron or iron on the coils of the intermediate frequency furnace.

2. Attention should be paid to the inlet and outlet directions of the intermediate frequency furnace coil cooling water.

The correct direction of cooling water is down, up and down to avoid fouling of the water tank. The intermediate frequency furnace should be equipped with a pressure water cooling coil, and more attention should be paid to the flow of other water to ensure the cooling effect of the intermediate frequency furnace coil.

3. Regardless of whether the intermediate frequency electric furnace is used for diathermy or smelting, attention should be paid to the use of furnace lining. If the furnace lining will damage the metal oxide on the coil, it will cause a short circuit between turns.

If the lining breaks, it will cause the furnace to penetrate (due to the thinning of the lining, the molten steel flows through the lining to the induction coil).

In this case, the high-temperature molten iron will burn out the induction coil of the intermediate-frequency electric furnace. 

Therefore, the lining material of the intermediate frequency furnace should be checked frequently to avoid damage to the lining due to thermal shock.