PNEUMATIC CRANE
#1

Presented By-
Rupinder Singh
Sachin Kumar
Arun Kumar Pal
Sundeep Kumar

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PNEUMATIC CRANE
INTRODUCTION

 Crane- A crane is a lifting machine which is used both to lift and lower materials and to move them horizontally.
 Cranes have come into their present widespread application only since the introduction of engines, internal-combustion engines, and electric motors, beginning in the 19th century.
Block diagram of a simple crane
Classification of cranes
Cranes can be broadly classified into three groups-
1.Mechanical Cranes
2.Hydraulic Cranes
3.Pneumatic Cranes
Mechanical Cranes:- These uses one or more simple machines like engine,motor etc.to create mechanical advantage.
Hydraulic Cranes:- These cranes use a hydraulic system using an incompressible fluid.
Pneumatic Cranes:-These cranes use a pneumatic cylinder that impart a force by converting the potential energy of compressed gas into kinetic energy.
 A Crane
Pneumatic cylinder
 Pneumatic cylinders are mechanical devices which produce force in combination with movement and are powered by compressed gas (air).
 A piston reciprocates inside the cylinder.A pump is used to supply air to the cylinder.
 The compressed gas expand and forces piston to move in the desired direction.
 Pneumatic cylinder can be single acting or double acting .
 Operation diagram of a single acting cylinder. The spring can also be outside the cylinder, attached to the item being moved.
 Operation diagram of a double acting cylinder
 3D animated pneumatic cylinder( CAD)
Advantages of pneumatics
Simplicity of Design And Control

o Machines are easily designed using standard cylinders & other components. Control is as easy as it is simple ON - OFF type control.
Reliability
o Pneumatic systems tend to have long operating lives and require very little maintenance.
o Because gas is compressible, the equipment is less likely to be damaged by shock. The gas in pneumatics absorbs excessive force, whereas the fluid of hydraulics directly transfers force.
Storage
o Compressed Gas can be stored, allowing the use of machines when electrical power is lost.
Safety
o Very low chance of fire (compared to hydraulic oil).
 Machines can be designed to be overload

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#2
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How Do Accidents Occur?
• Instability – unsecured load, load capacity exceeded, or ground not level or too soft
• Lack of communication - the point of operation is a distance from the crane operator or not in full view of the operator
• Lack of training
• Inadequate maintenance or inspection
Who is at Risk
• Operators
• Persons at Crane Site
Definitions
• Crane – Consists of a rotating structure for lifting and lowering horizontally on rubber tires or crawler treads
• Hoist - Used to lift and lower load.
• Boom – An inclined spar, strut, or other long member supporting the hoisting tackle
• Boom stops – A device used to limit the angle of the boom at its highest position
• Brake – To slow or stop motion by friction or power
• Block – Sheaves or grooved pulleys in a frame with hook, eye and strap
• Jib – Extension attached to the boom point to provide added boom length for lifting specified loads.
Types of Cranes
• Mobile
• Hydraulic
• Overhead
• Gantry
• Tower
Crane Hazards
• Improper load rating
• Excessive speeds
• No hand signals
• Inadequate inspection and maintenance
• Unguarded parts
• Unguarded swing radius
• Working too close to power lines
• Improper exhaust system
• Shattered windows
• No steps/guardrails walkways
• No boom angle indicator
• Not using outriggers
Planning Before Start-Up
• Level the crane and ensure support surface is firm and able to support the load
• Contact power line owners and determine precautions. Know the location and voltage of overhead power lines.
• Know the basic crane capacities, limitations, and job site restrictions, such as the location of power lines, unstable soil, or high winds.
• Make other personnel aware of hoisting activities.
• Barricade areas within swing radius.
• Ensure proper maintenance and inspections.
• Determine safe areas to store materials and place machinery.

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#3
plz upload the seminar report of pneumatic crane as soon as possible.thanks for the slides
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#4





to get information about the topic"PNEUMATIC CRANE"refer the page link bellow

http://studentbank.in/report-pneumatic-c...2#pid59112
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