An electronic system designed for controlled hydraulic movement is known as a synchronous lifting system. The pressure and extension of a number of cylinders are transmitted back to a central computer control system in this electronically managed system. To keep the load level within a predetermined and precise tolerance, this control system automatically opens and closes directional control valves as needed.
Synchronous jacking system work
As a result, the synchronous jacking system will correct for minor fluctuations in pump output or cylinder size. The asynchronous lifting system is commonly used for bridge raising or repositioning, heavy equipment lifting and lowering structure levelling, and structural testing. Individual cylinders can be controlled manually for set-up purposes, as well as fully synchronised lifting and lowering.
Tracking and data logging is displayed on the touch screen display, and complete safety features are included as standard. A multipoint lifting option on a structure with uneven load is provided by a split flow pump, like the Hi-Force HSP family. The pump lifts the load by providing nominally equal oil flow to each output, which is sufficient for many applications.
Small differences in the lift are accentuated when there is an unequal load distribution or the cylinder stroke required is exceptionally long, which might result in an uneven lift in some situations. While the HSP family of pumps includes a control hand pendant that allows for independent changes to each cylinder as needed throughout the raise, if greater accuracy is required, a synchronous lifting system may be the better alternative.
Synchronous lifting and synchronised jacking systems
Hydra-Capsule Limited’s synchronised jacking system can use various input sensors to regulate lifting, lowering, weighing, and positioning of big structures regardless of weight distribution, and it offers real-time monitoring capabilities.
Our electronic instrumentation can be connected to the control system as a single circuit, allowing the computer-controlled system to monitor each jack’s movement with stroke sensors and loads with pressure transducers. Jack control is provided by solenoid valves, which allow equal raising or lowering regardless of the loads within each jack.
ESF30 – Single flow hydraulic pumps provide precise control via an internal solenoid control valve system that can also be controlled remotely. The pump is equipped with a variable pressure switch that allows the maximum pressure to be pre-selected and the pump to automatically stop when reached.
An internal pressure sensor transmits the pressure to an LED read-out that can be calibrated to meet your needs. A number of pumps can be placed in various locations and connected to our remote central control system to enable group control and monitoring. This is particularly useful for sequential (synchronised) lifting or lowering operations over long distances, such as bridge piers or different floor levels within a building.
EMF50 – Our multiple flow units contain four distinct displacement pumps that run simultaneously from a single-engine. Each output supplies an identical volume of oil regardless of pressure, which gives the jacks an equal lift. It is critical that each output has the same volume, i.e. the same number and size of jacks; please contact us for more information or assistance.
Working principle:
A mechanical jacking system, industrial computer PLC control technology, displacement monitoring, bridge structure analysis and construction technology are all part of the pulse width synchronous control system.
- Develop and combine a comprehensive collection of technologies into a single system.
- The foundational technology to achieve the oil pump, the hydraulic pump station uses the on-off valve to control the flow and varies the switching frequency of the on-off valve to vary the flow rate.
- With the use of a computer control system and a detecting feedback system, the output flow may be modified to establish pressure and displacement closed-loop control system that can be precisely regulated.
- Customised Hydraulic Hose Press During synchronisation and weighing during lifting, each jack is load balanced.
Steps in the procedure:
- Make sure you’re using the hydraulic jack correctly. The proper use of the jack can be found in the jack’s precautions and the proper installation of the displacement sensor.
- Customised Hydraulic Hose Press Connect the hydraulic and sensor lines, as well as the power supply.
- Check the pipe and sensor line in manual control after powering on after inserting the pipeline.
- Change the mode to manual ascending mode before starting the synchronous jacking operation, and then press the closure button, China Synchronised Lifting Jacks When the actual pressure is reached, the jack begins to rise. The jack automatically stops lifting when the pressure value is attained. The closing pressure setting value is: the optimum setting value is around 30% of the actual load.
- Set the goal displacement amount first when the fitting is finished. China Synchronised Lifting Jacks will automatically raise and rise to the selected target value when the up button is pressed. The action will be automatically stopped.
Conclusion
The only viable way to securely lift the structure with full, real-time visibility of the loads and displacements, as well as the ability to limit maximum forces and maintain adjacent lifting points within prescribed tolerances to reduce applied stresses within the structure, is to use a Computer-Controlled Synchronous Lifting System. Synchronous lifting systems are a better alternative than manual systems for any bridge lifting application since they include comprehensive data logging for evidence of displacement and applied load, as well as precise control of the lift and the elimination of having people under the structure.