Synchronous lifting equipment

1. Product Overview

The synchronous jacking equipment for bridge bearing replacement is an intelligent hydraulic control system specifically designed for bridge bearing replacement, pier repair, structural lifting, and settlement correction.

This equipment utilizes multi-point hydraulic synchronous control technology to achieve precise coordination of the displacement, pressure, and speed of multiple jacks, thereby ensuring the safety, stability, and synchronization of the bridge beam during lifting and lowering.

The system features high-precision control, real-time monitoring, automatic alarm, and data recording functions, and can be widely applied to large and medium-sized bridge bearing replacement, structural lifting and reinforcement, and bridge settlement correction projects.

2. Product Technical Specifications
This equipment adopts the electro-hydraulic servo synchronous control principle, achieving multi-point intelligent coordination through PLC or industrial computer.

It can support synchronous operation of 4 to 64 lifting points, with a control accuracy of ±0.5 mm.

The rated hydraulic cylinder pressure range for a single lifting point is 10 MPa to 70 MPa, and the single-cylinder lifting force covers 50 t to 500 t, which can be flexibly configured according to the weight of the bridge beam and the lifting height.

The system monitors hydraulic pressure, stroke, synchronization error, and support status in real time, and has automatic pressure compensation and adaptive balancing functions.

The equipment is responsive, has stable hydraulic pressure, and features overload protection and emergency pressure relief devices.

The control system uses an industrial-grade LCD touch screen, which can display data from each apex in real time and automatically record the entire construction process.

The equipment is suitable for ambient temperatures of -20℃ to +60℃, with a protection rating of not less than IP54, and can operate safely under long-term outdoor conditions.

3. Product Working Principle
The synchronous lifting equipment uses a hydraulic system as the execution core and an electrical system as the control center.

Each lifting point consists of a high-precision hydraulic cylinder, displacement sensor, pressure sensor, and electrically controlled valve.

The main control system uses dual control via displacement and pressure closed loops to compare and adjust each lifting point in real time, automatically correcting asynchrony caused by hydraulic pressure fluctuations or differences in structural stiffness.

When a certain apex rises or experiences a force deviation, the system immediately issues a correction command, automatically replenishing or releasing pressure to maintain synchronous lifting and lowering of all apexes.

This working mechanism effectively prevents beam distortion, cracking, or support detachment, ensuring structural safety and construction accuracy.

4. Product Application Scope

 Replacement of supports and lifting of beams for various highway and railway bridges;

 Overall lifting or lowering of bridge piers, continuous beams, and box girder structures;

 Bridge structure settlement adjustment and expansion joint replacement construction;

 Maintenance and reinforcement of urban viaducts, overpasses, and sea bridges;

 Synchronous lifting and displacement control operations for large structures such as factories, tunnels, and docks.

5. Product Advantages

 High-precision control: Synchronization accuracy reaches ±0.5 mm, avoiding structural stress concentration.

 Safe and reliable: Equipped with automatic alarm and protection functions for overpressure, underpressure, and misalignment.

 Intelligent operation: PLC centralized control, enabling automatic, semi-automatic, and manual modes.

 Data recording and analysis: Real-time display of lifting displacement and pressure curves, facilitating quality traceability.

 Modular design: Equipment can be freely combined according to project scale, facilitating transportation and installation.

 Strong adaptability: Suitable for various bridge types, construction environments, and different lifting processes.

6. Equipment Composition

1. Hydraulic power unit (oil pump station): Provides a stable pressure oil source.

2. Electrical control system (PLC + touch panel): Core control and monitoring module.

3. Hydraulic cylinders and sensors: Actuators and real-time feedback components.

4. Oil pipes and distribution valve group: Enables multi-point pressure and flow distribution.

5. Monitoring and alarm system: Full-process data acquisition and safety control.