|
Table 4-3 Common faults and troubleshooting of power frequency coreless induction furnace |
||
|
Failure and phenomenon |
cause |
elimination method |
|
Broken cooling water pipe |
Scale clogging |
Regular replacement and cleaning |
|
Damaged water-cooled cable |
Aging after long-term use |
Regular replacement |
|
Cracked pipe |
Replace immediately and regularly, check for leaks |
|
|
Furnace cooling water temperature rises |
Rust attached to the pipe or blocked by foreign matter |
Pickling or blowing with compressed air when the furnace is empty |
|
The water pump displacement has not reached the pump capacity |
Repair the water pump and confirm whether the amount of water is appropriate |
|
|
Part of the furnace lining has been burned |
Check the burning of the furnace lining and repair it in time |
|
|
Coil grounding accident |
Foreign iron beans and foreign objects adhere to the surface of the coil and cause a short circuit |
Daily cleaning, protect with dust-proof tape |
|
Foreign iron beans, etc. drilled into the gap between the coil and the yoke adhered to the short circuit |
Install dust curtains, refurbish the gap between the stove and the periphery of the stove, brush insulating paint to enhance the insulation between coil layers |
|
|
When rebuilding the furnace, due to the iron beans and other metals drilled into the coil, the charge is not completely removed, resulting in a short circuit |
Remove iron beans and other metal objects that are likely to cause short circuits |
|
|
Slime iron |
The lining was not compacted during repair |
Use correct tamping method and replace furnace building tools |
|
Improper sintering (residual moisture, incomplete sintering) |
Follow the sintering process, use anhydrous boric acid, add an appropriate amount |
|
|
Mixed with foreign matter |
No foreign objects are allowed to enter |
|
|
Improper repair of refractory materials |
Choose and mix the repair materials |
|
|
Use time is too long |
Check the furnace diameter and height once a week, control the furnace age, and then build the furnace |
|
|
Cracked lining |
Repair or rebuild the furnace according to the size of the cracks |
|
|
Transformer failure |
Self-heating when oil temperature rises (under load) |
Regular inspection of refueling and gas analysis of insulating oil |
|
Oil deterioration (mixed with moisture, natural deterioration, etc.), resulting in a drop in pressure resistance |
Check the air volume of the cooling fan to see if it is blocked |
|
|
Capacitor burnout, breakdown |
Spontaneous heating when oil temperature rises |
When removing or replacing the alarm, please pay attention to the operation when the voltage drops and do not exceed the temperature setting value |
|
Withstand voltage drop due to oil oxidation, natural deterioration, etc. |
Check cooling fan air flow and clogging, 1 Yue 1 times the appearance of periodic inspection (summer to pay special attention) |
|
|
Leakage Liquid Detector |
Circuit break |
replace |
|
Poor contact |
Week 1 examination leak detector liquid iron, monthly check point of contact 1 time |
|
|
Bus connection |
Poor contact of busbar fastening part |
Adjust power factor or phase balance |
|
Overcurrent |
Power factor or phase balance imbalance |
Adjust power factor or phase balance |
|
Short circuit between mechanical phases |
Repair and replace |
|
