Product Introduction:
The Synchronized Chain Hydraulic Jacking System represents the pinnacle of heavy lifting technology for the storage tank industry. Engineered for extreme reliability and precision, this system employs a network of high-capacity hydraulic chain jacks operating under the command of a sophisticated central control unit. Its primary function is to execute the critical "tank lift" – raising the entire welded tank shell (excluding the bottom plate resting on the foundation) to a specific height. This controlled elevation is essential for accessing and welding the tank's annular plate (the joint between the tank bottom and the shell), inspecting the foundation, performing repairs, or facilitating relocation. The chain mechanism provides a direct, positive lift with minimal stretch or elongation, ensuring predictable and accurate movement essential for structural alignment.
Technical Parameter
System Total Capacity: 2000 Tons to 10,000+ Tons (Fully scalable).
Jack Configuration: 16 x 250 Ton Hydraulic Chain Jacks (Example for a medium-large tank).
Chain Size & Grade: 22mm or 26mm, Grade 120 Alloy Steel (DIN 5688 Type WA or similar).
Working Stroke per Jack: 500 mm.
Lifting Height per Lift: Typically 500mm - 1500mm (Requires re-stroking jacks for greater heights).
Control System: Programmable Logic Controller (PLC) with Color Touchscreen, featuring:
Real-time display of load (tonnage) at each jack.
Real-time display of position (height) of each jack.
Automatic synchronization mode with adjustable tolerance (±2mm typical).
Manual individual jack control mode.
Data logging and event recording.
Comprehensive alarm system (overload, desync, chain slack, low oil, etc.).
Hydraulic Power Unit: High-pressure (700 bar), high-flow unit with multiple pumps for speed, electric motor driven (Diesel option for remote sites). Includes accumulators for emergency lowering.
Safety Devices: Mechanical locking nuts on each jack cylinder, emergency stop buttons, pressure relief valves, chain slack sensors, structural overload protection in PLC.
Environmental Rating: IP65 for control panel & power unit (suitable for outdoor sites).
Key Features:
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Absolute Synchronization: The hallmark feature. The PLC constantly compares jack positions and adjusts hydraulic flow in real-time, guaranteeing all lifting points move together within strict tolerances (±2-5mm), preventing dangerous tank shell distortion.
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Real-Time Monitoring & Control: Operators have complete visibility of loads and positions at every jack via the HMI, enabling proactive intervention and ensuring process transparency.
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Robust Chain Technology: Alloy steel lifting chains offer superior tensile strength, abrasion resistance, and tolerance to harsh site conditions (dust, moisture) compared to wire ropes. They are also easier to inspect for wear.
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Inherent Safety: Multiple layers of safety: structural (chain strength), mechanical (locking nuts), hydraulic (pressure relief), and electronic (PLC monitoring/alarms). The positive grip of the chain is highly secure.
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High Power Density: Delivers enormous lifting forces from compact jacks, minimizing the required workspace around the tank perimeter.
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Smooth & Controlled Motion: Hydraulic actuation ensures jerk-free lifting and lowering, vital for the structural integrity of the tank shell during the operation.
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Ease of Setup & Operation: Modular components simplify rigging. The intuitive HMI interface makes complex lifting operations manageable by trained personnel.
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Durability: Designed for heavy industrial use and repeated deployment on demanding construction and maintenance projects.
Applications:
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Critical Annular Plate Welding: The primary application. Lifting the tank shell to create the necessary access gap for welding and inspecting the crucial joint between the tank floor and the shell wall, ensuring leak-proof integrity (per API 650 standards).
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Comprehensive Base Inspection & Repair: Elevating the tank provides full access to the tank bottom, foundation ringwall, and underside of the shell for Non-Destructive Testing (NDT), corrosion assessment, concrete repair, or bottom plate replacement.
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Tank Foundation Modifications/Replacement: Enabling the removal and reconstruction of the concrete foundation or installation of new seismic base isolation systems while the tank is safely elevated.
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Controlled Tank Setting: Precise final lowering and positioning of the tank onto prepared foundations, piles, or specialized supports.
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Tank Raising for Roof Access/Work: Facilitating the installation, maintenance, or replacement of fixed or floating roofs.
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Emergency Stabilization & Recovery: Used in situations where a tank has settled unevenly or requires stabilization for remediation work.
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Industry Sectors: Essential for EPC contractors and owners in Crude Oil Storage, Refined Product Storage (Gasoline, Diesel), Chemical Storage (Acids, Solvents), LNG/LPG Storage (outer containment tanks), Large Potable Water & Wastewater Tanks, and Bulk Storage Silos.
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Synchronized Chain Hydraulic Jacking System 12-120t Capacity Images
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