INDUSTRIAL OVERHEAD CRANES:
Overhead crane is a kind of machine which is permanently fixed in placed overhead, for the purposed of lifting huge and heavy objects which cannot be moved easily by hand. This type of crane is very expensive and able of moving enormous quantity of materials.
The most common overhead crane use is in steel industry, on every step of manufacturing procedure. From scrap steel next to molten metal then finally to billet steel as finish product intended for rolling mills as raw materials in producing different kind of steel bars.
Make use of overhead cranes on steel industry be important on every step of plant operation. Beginning with loading metal scrap in charging basket using overhead cranes equipped with electromagnet, carry afterward via charging overhead crane to electric arc furnace for processing and refining. As soon as it reach the required temperature, molten metal decant to ladle taken by means of high capacity tapping overhead cranes. Transport the molten metal to continuous casting machine to produce finish billet steel. Loading overhead crane lift up the billet steel and place inside the delivery truck.
OPERATION OF OVERHEAD CRANE:
Operators who handle this type of overhead crane have got to undertake rigid training and familiarization of machine. Company sponsored seminars educate operators for effective and safe operation of overhead crane, both in theoretical and in actual application.
Operation guidelines should be enforce through;
Control familiarization, by knowing their location and their function.
Equipment daily inspection before use.
Marking and labeling of all electrical controls.
Testing the overhead crane by moving it briefly in every direction that it travels.
Checking all limit switch for both the upper and lower hoist.
PREVENTIVE MAINTENANCE AND REPAIR:
The benefits of performing daily, weekly, monthly and quarterly routine inspection and maintenance, on every overhead crane;
Lower the cost on repairs, including expediting cost and airfreight bills when purchasing parts replacement.
Decrease equipment operation downtime due to breakdown.
Give the company an advance notice of equipment condition for future and existing maintenance budget requirements.
Maintenance cost savings budget alone, can be sufficient to allow for future upgrade and replacement.
Mechanical section: Some parts can be fabricated locally with the same materials use as compared to original parts.
Electrical section: Most parts are imported and not available in local market, an upgrade and revision to electrical plan should act upon provided that operation and protection relaying is similar to original electrical diagram and to make use of parts available in local market.
All electrical diagram listed below be upgraded or revise with respect to our plant environment design.
Overhead Crane No.2: OHC No.2.pdf
Overhead Crane No.7: OHC No.7.pdf
Overhead Crane ABUS – Revise No.1: OHC=Abus Revise No.1.pdf
Overhead Crane ABUS – Revise: OHC=Abus Revise.pdf
Overhead Crane ABUS – Push Button: OHC=Abus.PB.pdf
Overhead Crane DEMAG – Revise: OHC=Demag Revise.pdf
Overhead Crane – Electrical Cable Data: OHC=Electrical Cable Data.pdf
Overhead Crane – Magnet Control Circuit: OHC=Magnet Control Ckt.pdf
Overhead Crane – Magnet Panel No.1: OHC=Magnet Panel No.1.pdf
Overhead Crane – Magnet Panel No.2: OHC=Magnet Panel No.2.pdf
Overhead Crane – Magnet Revise No.1: OHC=Magnet Revise No.1.pdf
Overhead Crane – Revise No.2: OHC=Revise No.2.pdf