25 Tons Railway Vehicle Lifting Jacks , Railway Screw Lifters
Application scope:
The Mobile Lifting Jacks are used to lift the
railway vehicles to a suitable height for
assembly, inspection and maintenance, and lower the vehicles
after work completed. Very convenient for the operaters to work at
the bottom of the vehicles. The lifting jacks are operating
synchronously as a groupe of 4 units.
Techical Parameters:
| Lifting capacity of each jack | 25 tons |
| Lifting speed | Approx.200 mm/min |
| Minimum lifting height | 800mm |
| Maximum lifting height | 2500 mm |
| Lifting stroke | 1700 mm |
| Motor power of each jack | 5.5kW |
| Synchronization accuracy | 6 mm |
| Power supply | 380V / 50Hz, 3 phase AC |
| Noise level during working | Not more than 75 dB |
| Service life | 15 years |
(* Above parameters are indicative, and can be modified as per
customer's requirements.)
Main Features:
- The mobile lifting jack is mainly composed of jack frame, lifting
walking trolley, Lifting device, Electrical control system, safety
protection system, and etc.
- The jacks are easy mobility. Lifting eyes are provided for each
lifting jack.
- The jack frame is welded by steel plate and carried out stress
relief and annealing heat treatment after welding. The structure is
reasonable, firm and reliable.
- The lifting jack is provided with limit switch for the working nut.
When the working nut is worn to the set position, a fault message
will display on the screen and automatically cut off electric to
ensure the safety.
- The lifting jack is provided with safety protection nut. When the
working nut is seriously worn, and the working nut limit switch or
electrical system also fails at the same time, the safety nut will
bear the weight of the car body without causing danger.
- The lifting spindle is screw nut type (can be absolutely
self-locking).
- The synchronization of the lifting spindle is monitored and
corrected by the motor wiring circuit, and controlled by the
measuring device.
- The operation of the lifting jack is interlocked with the jack body
to ensure the safety, and the incorrect operation is not allowed.
- The control, interlocking and monitoring function of the lifting
jack can perform fault protection, making the future control wiring
change and expansion more simple.
- All control stations are designed with solid shells and proper
support to form a rigid structure. The outer corners and edges are
smooth and round. Inner edges are also smooth.
- All buttons and electrical interlocking is to prevent the relative
motion from wrong operation. All actions are clearly showed on the
control buttons.
- The main control console is provided with fault display panel. In
case a fault occurs, the buzzer on the panel sounds and the lamp
should flash to indicate the location and nature of the fault.
Press the confirm button, the buzzer will stop and the flash will
stop. When the fault is corrected, the display should be restored
to normal, press the reset button.
- The spindle unit is provided with a movement limit switch to
prevent the excessive lifting/lowering of any lifting element. Up
and down position limits will be set and adjustable.
- The lifting jack is equipped with overload circuit breaker to
protect the jack from damage when overloaded. Once the overload
device is activated, the overloading lamp and buzzer on the
corresponding panel will be on, and prohibit all operation modes
except down motion. After the overload is eliminated, the lifting
jack should be automatically resumed to normal operation.
- All control stations are provided with emergency stop button.
- In case of power failure or component failure, all the lifting
jacks in motion should be urgently stopped and locked. All buttons
should be terminated or invalid.
