Overhead cranes cover a rectangular area, moving a load side to side and backward and forward. The lifting device, called a hoist is mounted on a trolley for horizontal movement across a bridge beam connected to one or more horizontal girders which are supported at either end by end trucks.
How do overhead cranes work?
Keep overhead crane moving smoothly and avoid the abrupt and jerky movements during lifting. When lifting materials, avoiding everyone close to the hoist hook, sounds a bell and then start to hoist slowly. Strictly follow the signals to operate the crane except the emergency stopping situation.
How much does a bridge crane cost?
COMPLETE FREE STANDING OVERHEAD BRIDGE CRANE AND HOIST
|Model No.||Cap. tons||Price|
What are the three major components of a typical overhead crane system?
Category 2 and 3 Crane Components The principal parts of overhead traveling cranes are: bridge girders, end trucks, trolley with hoisting mechanism, and operator’s cab or pendant control.
What is the difference between a bridge crane and gantry crane?
Bridge cranes provide a lifting mechanism on an elevated rail for applications that require all processes off the floor. … Meanwhile, gantry cranes provide overhead lifting from a structure with legs and casters on the floor, either running in a track or trackless.
What should be done before operating a crane?
Check ground conditions to ensure stability. Visually inspect the crane before use. Make sure all loose materials, parts, blocking and packing have been removed from the load before lifting. Remove any slack from the sling and hoisting ropes before lifting the load.
What are the major advantages of overhead Travelling Crane?
What are the Benefits of Overhead Cranes?
- Increased Safety. Forklifts carry the risk of imprecise stacking, dropping goods as well as accidents (due to crashing). …
- Improved Load Control. …
- Avoid Floor Obstructions. …
- Improved Ergonomics. …
- Easy Lifting of Loads. …
29 июл. 2016 г.
What is the price of a crane?
Questions & Answers on Hydraulic Truck Crane
|Hydraulic Truck Crane Price Range||No of Products(%)|
|Rs 35000 – 44000||35%|
|Rs 44000 – 56000||12%|
|Rs 56000 – 71000||24%|
|Rs 71000 – 90000||24%|
How much does a construction crane cost?
Most construction companies rent their tower cranes from a company like Heede Southeast. Heede ships the crane to the site, assembles it and charges a monthly fee while the crane is on the site. The typical fee for installation and disassembly runs around $60,000.
How much does a jib crane cost?
Jib Crane: Anywhere from $500 – $25,000
There are many different types of jib cranes, including: Free-standing. Workstation (typically lighter capacity) Structural (can be designed up to 10-ton capacity)
Which motor is used in overhead crane?
While series DC motors consume more power than PMDC motors to produce their electromagnetic field, they’re powerful, efficient at high speeds and produce the most torque; hence, they are used for heavy duty winches. Shunt DC motors are used in constant speed applications, 18 such as reel drives.
How do you maintain an overhead crane?
Ensure there are no loose, broken, or damaged parts on the hoist, trolley, bridge, runway, or electric systems. Check that the wire rope is reeved and seated in the drum grooves properly. Verify that the bottom block is not twisted (no two lengths of wire rope should touch).
What is the purpose of a lifting fixture?
Lifting Devices Standard:
Lifting Devices (see definition below) are used to minimize the hazards associated with materials handling operations; some examples include cranes, hoists, lift trucks, scissor lifts, lift tables and forklifts.
How much can a gantry crane lift?
They have spans of 140 metres (460 ft) and can lift loads of up to 840 tonnes (830 long tons; 930 short tons) to a height of 70 metres (230 ft).
Do you need a ticket to operate a gantry crane?
Therefore the majority of bridge or gantry cranes do not require a licence to operate as they are both remote or pendant controlled and are limited to 3 or less powered motions (hoisting, traverse and travel). The regulations do not define the extent of a powered operation.
What is a gantry bridge?
Gantry cranes have a bridge that is supported by two a-frame rigid steel legs that rest on the floor. The legs are commonly equipped with casters so crane can be moved to different parts of a building.