1、 Matters needing attention in daily inspection of sealing belt conveyor
1. Carefully monitor and record the display parameters on the human-machine interface of the frequency converter, and immediately report any abnormality
2. Carefully monitor and record the ambient temperature of the inverter room, which should be between - 5 ℃ and 40 ℃. The temperature rise of phase shift transformer shall not exceed 130 ℃
3. When the temperature is high in summer, the ventilation and heat dissipation of the inverter installation site should be strengthened. Ensure that the surrounding air does not contain excessive dust, acid, salt, corrosive and explosive gases
4. Summer is a rainy season, so it is necessary to prevent rainwater from entering the inverter (for example, rainwater entering along the air outlet of the air duct)
5. The filter screen on the inverter cabinet door should be cleaned once a week; if the working environment is dusty, the cleaning interval should be shortened according to the actual situation
6. During the normal operation of the inverter, a piece of A4 paper with standard thickness should be firmly adsorbed on the filter screen at the air inlet of the cabinet door
7. The frequency conversion room must be kept clean and tidy, and should be cleaned at any time according to the actual situation of the site.
8. The ventilation and lighting of the frequency conversion room must be good, and the ventilation and heat dissipation equipment (air conditioning, ventilation fan, etc.) can operate normally
2、 Maintenance items of belt conveyor after shutdown
1. Clean the inside and outside of the inverter cabinet thoroughly with a vacuum cleaner with plastic suction nozzle to ensure that there is no excessive dust around the equipment.
2. Check the ventilation and lighting equipment of frequency conversion room to ensure the normal operation of ventilation equipment.
3. Check that the connection between the internal cables of the frequency converter is correct and reliable
4. Check that all the grounding points in the inverter cabinet are reliable and there is no rust at the grounding points
5. The connecting nuts of the internal cables of the frequency converter shall be tightened once every half a year
6. When the frequency converter of the sealing belt conveyor stops for a long time and returns to operation, the insulation of the frequency converter (including the phase-shifting transformer and the main circuit of the bypass cabinet) shall be measured, and a 2500V megger shall be used. The inverter can be started only after the insulation test is qualified.