Daily maintenance and troubleshooting methods of trolley annealing furnace

Daily maintenance:
1. Before maintenance, the operator of the trolley annealing furnace should be familiar with the structure and performance of the electric furnace and its auxiliary equipment, the layout of the distribution system and control system, and the operating process procedures.
2. When using the trolley furnace equipment in daily life, it is necessary to check whether the power supply of the equipment is normal, whether there is a power outage, short circuit, or bare wire situation. Regularly check whether the contact at the grounding device wiring is good, whether there is any damage to the heating element, whether the contact at each connection is good, whether there is any contact with the furnace body and casing, whether there is any abnormal phenomenon in the temperature control system, and whether the furnace door lifting and lowering are checked Is the entry and exit operation of the trolley normal.
3. Workpieces with corrosiveness, volatility, and gas are strictly prohibited from entering the furnace for improvement, in order to avoid affecting the service life of heating elements and refractory materials and causing accidents.
4. Electric furnaces must not operate at excessive temperatures, otherwise it will shorten the service life of the equipment.
5. Workpieces with too much oxide skin need to be removed before entering the furnace, and can be brushed with a steel wire brush.
6. The workpieces are evenly stacked.
7. Rough operation is strictly prohibited, and workpieces should be handled with care to avoid impact.
8. When using an electric furnace, operators are not allowed to leave their posts without authorization and should pay attention to whether the working condition of the electric furnace is normal.
9. When loading and unloading workpieces in the trolley annealing furnace, the heating element power supply must be cut off first.
10. The oxides in the furnace should be cleaned regularly, and compressed air can be used to blow under the bottom plate of the furnace.
11. If the resistance wire is used, it must not collide or bend to avoid breakage.
12. Attention: The electric furnace motor needs to be regularly checked and lubricated. The transmission shaft sleeve should be regularly checked and lubricated. The use of heating elements should be checked regularly, and the use of instruments and thermocouples should be checked regularly to avoid incorrect temperature measurement caused by errors in instruments and thermocouples.
Troubleshooting methods:
1. The possibility of phase failure: poor contact of the trolley; Heating element burnt out; The fuse is burnt out;
Repair plan: Adjust the joint spring and sand the contact surface of the joint with sandpaper; Weld heating elements with stainless steel welding rods and replace fuses.
2. The possibility of abnormal instrument data: damage to the integrated circuit of the instrument, burning of the thyristor electrical appliances;
Repair plan: Replace the instrument and thyristor.
3. The trolley is not moving smoothly, resulting in resistance: the step bricks in the furnace are rubbing against the step bricks of the trolley, the guide rail is concave and too smooth, and the transmission chain is too loose;
Maintenance plan: Adjust the length of the transmission chain; Check the stuck position to see if the bricks have shifted and reset them; Use welding rods to level it.
4. Poor insulation: The furnace door is not tightly sealed with the furnace mouth;
Maintenance plan: Check if the gap between the annealing furnace doors on the trolley is too large, adjust the pulleys of the furnace doors to make them tightly closed.