Electromech
Engineers' Double Girder Bridge Cranes |
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| Double Girder
Bridge cranes form a major chunk of orders received by Electromech Engineers
annually. As a result, the company has successfully managed to refine this particular
product over time to reflect changing customer needs and evolving technology. The figure above shows a Double Girder Bridge
crane with Auxiliary Hoist. Electromech Engineers
manufactures Double Girder Bridge cranes without the auxiliary hoisting feature
also. Depending on the spans of the factory sheds, the Double Girder Bridge Crane
can come either with a Single Drive system or a Twin Drive system. |
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| Electromech
Engineers also makes cranes that have a cabin control feature as is seen in the
picture on the left above. Depending
on the Safe Working Load of the crane, the Double Girder Bridge Cranes
have either a carriage type travelling mechanism or a bogey type travelling
mechanism.
The range of specifications for Double
Girder Bridge Cranes along with their standard features are given below. |
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| Range
of Specifications -
| Safe
Working Load |
2000 kg to
150,000 kg |
| Spans |
6 m to 40 m |
| Heights of Lift |
As per customer
specifications. |
| Class of Duty / Standards |
Class 2, Class
3, Class 4 as per IS 3177 / IS 807. Also available as per FEM, DIN, BS or any other
applicable international standards. |
| Speeds |
Selected
depending on client specifications / applications / shed dimensions |
| Crane Control |
From floor
through Pendant Push Buttons Open
Cabin / Totally Enclosed Cabin
Radio Control |
| Drive System |
Single / Twin
Drive with Squirrel Cage / Slip Ring Induction Motors, through totally enclosed, oil
immersed, helical gearbox. |
| Motors |
Foot mounted,
IEC Frame Size, Crane Duty motors for Main Hoisting, Auxiliary Hoisting, Cross Travel and
Long Travel. |
| Brakes |
Electro
Hydraulic Thrusters for all motions. DC/AC Electro Magnetic Brakes or additional brakes can be provided
on request. |
| Power Supply System |
To Hoist and
Cross Travel through Trailing Cables To Crane through Trailing Cable / MS Angle Iron Conductors / Bare
Copper Conductors (depending on customer's choice) |
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Standard
Features of Electromech Engineers' Double Girder Cranes -
- Optimum design ensuring minimum Dead Weight,
Wheel Loads, Head Rooms and Clearances, reducing building costs.
- Forged runner wheels on Spherical
Roller Bearings, resulting in long trouble free service.
- Hobbed and Run-In Heat Treated Gears machined
from High Carbon Steel / Alloy Steels to ensure smooth, silent and durable service.
- Wide range of Heights of Lift, Hoisting,
Cross & Long Travel Speeds to suit every operational requirement.
- Amply proportioned Main Girders of
Box section, fabricated from IS 2062 plates that have undergone rigorous quality testing.
All butt welds are 100% radiographed. Main Girders further stiffened with long
and short diaphragms.
- End Carriages are made either from
rolled sections or fabricated from plates.
- Well proportioned Live Axle Type Runner
Wheels on "L" type bearing housings.
- Rope Drum fabricated from seamless
pipes (ASTM A-106 Grade B) or from IS 2062 plates. The Rope Drum is stress
relieved and the long seams are 100% radiographed.
- Standardized sub-assemblies used for complete
range ensures quick supply of spares in case of emergencies or routine maintenance.
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