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Hoisting equipments

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hoisting equipments and their types and uses and hiring charges

Published in: Engineering

Hoisting equipments

  1. 1. The hoisting is the lifting of the material against gravity and maybe done with a wide range of equipments from the small hand operated simple screw or hydraulic-jack to modern high powered cranes and elevators.
  2. 2. The common equipments used are as follows:  Pulley and sheave block  Chain hoists  Mobile cranes  Winch  Jack  Shear leg  Tower cranes  Whirler cranes  Derrick cranes  Gantry cranes
  3. 3.  A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. In nautical contexts, the assembly of wheel, axle, and supporting shell is referred to as a "block."  A pulley may also be called a sheave or drum and may have a groove between two flanges around its circumference. The drive element of a pulley system can be a rope, cable, belt, or chain that runs over the pulley inside the groove.
  4. 4.  The pulley and sheave blocks suitable for lifting rough surface and heavy loads.  For this purpose the chains and wire ropes are used.  The alloy chains are best suited for hoisting operation.  The weakest component of this system is the load hook. The hook fails by straightening. Once the hook gets elongated or straightened, it should be replaced.  A typical sheave and pulley block is shown in fig.
  5. 5.  The chain hoists are the popular mechanism for lifting loads upto tones.  The system consists of two sets of chains, namely the hand and load chain.  The hand chains are particularly useful for the isolated location , where an electric motor or other types of mechanical equipments are not available.  The pull applied through the hand chain is transmitted to the load chain with a multiplication factor of over 20.
  6. 6.  The load to be lifted is held by a load hook while another hook(called support hook) at the top, support the mechanism.  The two hooks however ,should not be interchange as the support hook is made much stronger than the load hook.  There are four types of hand operated chain hoists are in use:  ( 1) Differential  (2)screw geared  (3) spur geared  (4) pull lift
  7. 7.  Mobile crane is used in big construction projects for lifting heavy loads.  It is used for loading and unloading for material in coal mines.  Loading and unloading of ships.  To take the load from ground level and place it into the trucks.
  8. 8.  A winch is a mechanism in the shape of a cylinder or drum, over which rope or chain is wound.  If a winch is used only for raising and lowering, it is sometimes referred to as hoist.  The winches are of two types :-  (1) hand winches  (2) power winches
  9. 9.  These are the crane of swing job type and are mounted on high steel towers.  The height of tower maybe 25 to 30 m and these cranes are found to be suitable in the construction of tall buildings in congested areas.  The ground area required for such cranes is very small.
  10. 10.  This crane is a combination of stationary and mobile unit. This combines the advantages of log boom of derrick crane and mobility of the mobile crane.  The rotating structure has an outer framework.  The boom is attached to the front end of this framework. The counter weight is provided at the rear end. On the diagonally opposite corners of the base, two separate motors are provided, which give movement to the central shaft.
  11. 11.  The derrick cranes are of two types, namely:  (1) Guy derrick and  (2) Stiff leg derrick  The guy derrick consists of a vertical mast. This mast is supported by the number of guys and can revolve through 360‫.ﹾ‬  While revolving, the radius of revolution should be such that the revolving structure is not obstructed by the guy wires.  The power is supplied by a diesel engine or by an electric motor.
  12. 12.  A typical derrick crane is illustrated in fig.  This derrick can be constructed upto 200 tonnes capacity .  In stiff leg type derricks, the guy wires are replaced by trussed structure.  This type of derricks are suitable for loads from 10 to 50 tonnes.
  13. 13.  The Gantry cranes or overhead cranes are the indispensable machines in factories and workshops.  In large workshops, there are separate machines for fabrications or repairs of the machine parts.  The machine or the components, which are to be repaired, can be transferred to the place of fabrication or assembly with the help of Gantry cranes.
  14. 14.  Pulley and sheave block :- ₹ 30000 - 120000  Electric chain hoist 2 tonnes:- ₹ 30000 - 1200000  Electric whinches :- ₹ 8400 - 300000  Hydraulic jack :- ₹ 30000 – 84000  Overhead crane or gantry crane :- ₹360000 – 18000000  Tower crane :- ₹6000000 – 12000000  70 tone hydraulic crawler crane :- ₹ 1500000 – 18000000  Elevators :- ₹ 600000 – 1800000
  15. 15.  Fixed Derrick crane :- ₹ 1560000 – 2400000  Mobile cranes :- ₹ 1200000 – 3000000  Truck cranes 7 ton :- ₹ 500000 - 1800000  Truck mounted crrane 70 ton :- ₹ 12000000 - 18000000
  16. 16.  Hoisting equipment assists in the lifting and positioning of large, heavy loads in a variety of industries, including:  Automotive  Chemicals  Commercial printing  Manufacturing  Newspaper  Paper  Steel  Warehousing and distribution
  17. 17.  Hoisting equipment provides a variety of benefits:  Customizable – Hoisting equipment can be customized with below the hook attachments, end effectors or specialized tooling to handle a diverse variety of products and loads  Ergonomics – By doing the heavy lifting, hoisting equipment takes the strain off operators, reducing fatigue and lowering the risk of injury  Flexible – Hoisting equipment can be easily re-fitted for longer lifting capability
  18. 18.  Reduction in product damage – By allowing for smooth, direct-path lifting over obstacles—with soft start features, multiple speed options and a variety of end effectors to interface with and secure the load— products are handled gently to minimize damage  Safety – Because they operate overhead and work in a specific area, hoisting equipment is less likely than forklift traffic to maneuver a load into personnel, walls, machinery or other obstacles
  19. 19.  Hoisting equipment is used in a variety of areas to support processing and handling throughout a facility:  Assembly: Moving products through production processes  Positioning: Securing a component for additional work  Transportation: Loading finished products onto open trailers or railcars
  20. 20.  Staging: Holding work-in-process for additional production processes  Storage: Transporting heavy items to and from storage areas  Warehousing: Moving large, heavy products to and from docks
  21. 21.  Disadvantage of chain hoist is slow lifting pace and limited places.  Hydraulic engine hoist can take a lot of space in garage.  Electric hoist are not good with heavier loads.  electric hoist is that they need a special place to be installed.  electric hoist will be static and cannot be moved around (without special installations), so you will always have to place a reparable car in the same place.
  22. 22.  Electric hoist needs to be placed above the ground. This usually means mounting it to ceiling or building a special scaffolding to install an electric hoist.  Another disadvantage of electric hoist is that it needs an electric power source in order to work. Hydraulic or chain engine hoists need to be operated manually, while electric hoist has got an electrical motor that works with an electrical power.  electric hoist is fast and convenient tool to use for lifting moderately heavy loads, but becomes much more expensive, if you need to lift loads heavier than 225 kg (500 lb).
  23. 23.  The lifting of load is also very slow in chain hoist.  This lifting process in chain hoist is slower than electric hoists or hydraulic hoists.  The cranes used as hoisting equipments are expensive.  The climbing tower crane disadvantages:  Due to the direct support tower crane in the construction, the need for checking the structure, when necessary, temporary reinforcement, increased costs.
  24. 24.  Due to the crane installed in the elevator shaft of the building, so the crane installation will affect the construction schedule basement structure. due to the crane installed in the elevator shaft of the building, so the crane installation will affect the construction schedule basement structure.  driver communication links with the ground is difficult, driver vision is not enough open to lifting bring some security risks.  after the project is completed, disassemble downstairs need auxiliary lifting equipment, difficult to disassemble, not safety.
  25. 25.  Roughneck Industries  Neiko Enterpises  Haulmaster Industries  Torin  Blackbull  Goodway industries, Ghaziabad  Techno industries, Ahmedabad  Hydraulic force Enterprises, delhi  Power tech industries, Ludhiana  D.A.V. Engineering works, Ludhiana
  26. 26.  Belt and Bearing house, Ahmedabad  Trophy Tech India, Bengaluru  Southern Plantaids private Limited secunderabad  Sany Group, etc.
  27. 27.  Truck mounted 70 tone crane :- 40,000/day  Mobile crane 15 tone :- 10,000/day  Chain hoist :- 5000/day  Tower crane :- 90,000 to 1,20,000/day

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