FORBES GOKAK

Ring Road, Nagpur, Maharashtra

Crane capacity upgradation can save over 50% of cost as compared to replacement of existing crane by new. However, Crane upgradation needs high degree of understanding of crane design and analytical ability to carry out accurate reverse engineering. In most of the cases manufacturing drawings of existing crane are not available with the crane user and in such a situation detailed study of existing crane is essential to determine its suitability for capacity/ span upgradation.

Study of Crane Operation to determine duty cycle, Crane audit, Visual observation, dimensional verification, NDT testing of plates to determine residual thickness of load bearing structures, measurement of speeds of Hoist, CT and LT motions, measurement of motor currents, measurement of crane girder deflection under load and analysis ofstructures using computerised software such as STAAD & ANSYS are some of the technique that we employ to determine whether the crane is suitable for upgradation.

We also undertake upgradation of complete electrical system of crane. This may include replacement of slipring motors by Sq Cage motors with VVVF Control, provision of compact festoon cable system / drag chain in place of open wire system for trolley power supply, replacement of Angle Type DSL / open wire DSL by Shrouded Bus bars, Changing of Electrical Cables and Installation of Electronic Load weighing system/ Overload limiter on Crane.

Our design team has hands on experience of designing cranes for wide range of application ranging from Workshop duty, Power Plant, Cement Plant, General Engineering to Steel Mill duty. Our team has designed Ladle Handling Cranes, Magnet Cranes, Grab Bucket Cranes, Tong Cranes, Rotating Beam Crane up to 500 MT Capacity. Our head of Design has more than 40 years of experience in Design of EOT and Gantry Cranes.

Aditya make Wire rope hoists are light weight yet are rugged in construction. The wire rope hoists comprised of steel rope drum that is machined accurately with grooves for supporting wire rope. The rope drum is connected to motor through totally enclosed oil lubricated spur / helical gearbox. Fail safe electromagnetic brake provided on the input side of drive to prevent accidental lowering of load in the event of power failure.

Steel wire rope with fiber core is supplied as a standard design. Stainless steel wire rope with Stainless steel sheave and bush bearings are supplied for corrosive atmosphere as per customers requirement.

True vertical lift with 2 x 2 falls arrangement is also available in even smaller capacities as a special feature.

The trolley moves on straight track in standard design. Bogie type trolley is provided to negotiate curves when so required by customer.

Motors are Sq cage, totally enclosed fan cooled type with class F insulation. Upper and lower hook travel limit switch is provided as a standard feature. Additionally Counter weight operated over hoist limit switch is also available as an option.

In the standard design the DOL contactor starters are provided for motors. VVVF drives are supplied as per customers requirement.

Heavy duty cast iron rope band cum guide is provided. The cast iron rope band and guide is much more robust in construction and do not easily break as in case of plastic rope guide.

Double speed motors are also available for hoisting and CT motion as per customers need.

Transfer cars to meet varied need of industry are supplied by Aditya Cranes Pvt Ltd.

Self Propelled Ladle Transfer Car

Self propelled Ladle Transfer car is designed to move on straight track for inter bay transfer of steel ladles.

The transfer car frame is made from fabricated steel plates / rolled section of ample strength. The transfer car top is covered with refractory lining to protect the structure from heat and metal spillage.

Double flanged, straight tread wheels are provided for travel motion. The travel drive comprise of Sq Cage / slip ring motor, heavy duty helical gearbox, floating shafts and half geared couplings. In certain application carden shaft is used in place of floating shaft and half geared coupling. Electro hydraulically operated/ DC electromagnet brake is installed on gearbox input shaft to stop the motion when power is switched off.

Power supply to the transfer car is provided through cable reeling drum, insulated festoon cable system or covered shrouded bus bar as per the need.

For special application, transfer car is provided with bogies that can negotiate curved track.

Self Propelled Transfer Car for Scrap box

Self propelled Scrap Box / Scrap Bucket Transfer car used for inter bay transfer of steel scrap. These transfer cars are designed to move on straight track. Spring loaded platform is provided to reduce shock loads due to falling of scrap from magnet crane.

The transfer car frame is made from fabricated steel plates/ rolled section of ample strength.

Double flanged, straight tread wheels are provided for travel motion. The travel drive comprise of Sq Cage / slip ring motor, heavy duty helical gearbox, floating shafts and half geared couplings. Electro hydraulically operated/ DC electromagnet brake is installed on gearbox input shaft to stop the motion when power is switched off.

Power supply to the transfer car is provided through cable reeling drum, festoon cable system or covered shrouded bus bar as per the need.

Inter Bay Transfer car

Inter bay transfer cars are used for transferring material from one bay to another. The transfer car design is made based on the application.

The capacity can vary from 5 MT to 300 MT and the platform size can be big 4 meters x 10 meters in case of special applications.

The drive to these transfer car can be through motor gearbox united mounted on the car with external power supply (self propelled type), Wire rope Winch type drive or through Battery power.

Transfer cars to move on curved track

Transfer cars that move on curved track are similar to inter bay transfer car except these are designed to negotiate curves. The power supply is through rechargeable battery.

The transfer car frame is made from fabricated steel plates rolled section of ample strength. The transfer car top is covered with refractory lining to protect the structure from heat and metal spillage.The drive to these transfer car can be through motor gearbox united mounted on the car with external power supply (self propelled type), Wire rope Winch type drive or through Battery power.

Rope Drums are made from seamless pipe or MS rolled plates. Rope drums are supplied with or without flanges as per customer requirement. Butt welded joints in rope drum shell made from MS plates are tested radiographically. Rope drums are thermally stress relieved when made from MS plates. Left hand and right hand grooves are machined on rope drum for proper support to wire rope. Connection between hoist gearbox and rope drum can be made through splined joint, flexible in built geared joint or Barrel coupling Malmedie coupling. Rope drums are supported at non drive end in drum pedestal that houses antifriction ball spherical roller bearing.Sheave made from Cast Steel with grooves machined accurately for wire rope support. Sheaves with hardened groove are also available.

Aditya Cranes supply special purpose machines to meet the specific need of Industry. Be it hydraulic Upender unit for coils to make Eye Horizontal to Vertical and vise versa; mechanically operated work platform for transformer industry or Core Building Fixture for Transformer industry, we have solution available for your specific needs.

C hooks are used mainly steel industry for handling steel coils with Eye in Horizontal Position. C hooks of 5T to 40T Capacity are available to meet specific need of customer. C hooks are made from heavy steel plates. The cutting is done with critically stressed zone placed along the direction of rolling. Soft wearing pads are provided on base and vertical leg if so required by customer to avoid scratching on finished product. Appropriate counter weight is provided to balance the hook.Lifting beams are used for load handling with two cranes in tandem are generally high capacity and are designed to specific requirement of customer. These can be supplied with plate hooks, lifting pins or with a central shaft supported on bearing as per the specific handling requirement of customer. Aditya Cranes has supplied lifting beam of 280 MT capacity and we can supply lifting beams to handle loads up to 500 MT or more.