Hydraulic cranes use hydraulic power to lift and lower heavy loads. They consist of a vertical post with a jib and tie attached. A hydraulic jigger contains a movable ram inside a fixed cylinder. Pressurized water forces the ram to move, increasing the distance between pulley blocks and lifting the load via a wire rope. To lower loads, water is released from the cylinder, allowing the ram to move in the opposite direction and decreasing the distance between pulley blocks. Hydraulic cranes are widely used for loading and unloading ships, warehouses, workshops, and heavy industries.

1. Hydraulic Cranes
By Bhavesh Patwa (116120319007)
Mukesh Marvadi
(116120319008)
Branch: Mechanical Engineering

2. Outline
• Introduction
• Construction
• Working
• Application

3. Introduction
• The hydraulic crane is used for
transferring or raising heavy loads.
• It can be used up to loads 2500 kN.
• It is widely used in loading and unloading
ship, warehouses, workshop, heavy
industries and dock sidings.

4. Construction

5. Parts of hydraulic crane
•
•
•
•
•
Tie
Jib
Guide pulley
Jigger
Hollow vertical post

6. Construction
• The jib and tie are
attached to the
vertical post .jib is
hinged near the
foot of the vertical
post .

7. Construction
• Hydraulic jigger consist of a movable ram
sliding in a fixed cylinder . The sliding ram
, one end is connected to set of movable
pulley block and other end is contact with
water.

8. Construction
• One end of wire rope
fixed with cylinder body
is taken round all the
pulley of the two sets of
pulley and at the end
passes round the guide
pulley block.
• The free end of the wire
rope is attached with a
hook for suspending the
load.

9. Working
During the lifting the
load by crane, the
high pressure water
is admitted into the
fixed cylinder of
jigger.

10. Working
The pressuriesed
water forces the
sliding ram to move
right with movable
pulley bock.

11. Working
So that the distance
between two pulley
blocks increases

12. Working
Which causes the wire
passing over the guide
pulley is pulled by the
jigger and hence the
load attached to hook is
lifted.

13. Working
For lower the load, close
inlet valve and open wast
valve so that water is
forced out the cylinder
hence ram moves towards
the left and distance
between two pulley blocks
decreases, which release
the wire rope and the load
is lowering down

14. Application
• Hydraulic crane used for lowering workshop,
foundary, loading and unloading of ship and
Railway wagons and heavy industries.

15. Thank You…