Views: 1 Author: Site Editor Publish Time: 2026-09-18 Origin: Site
1. How Does the Telescopic Cage Work?
The jacking procedure using a telescopic cage involves three distinct phases:
Balancing the Crane: The upper crane structure is balanced by moving the trolley along the jib while carrying a specific load to align the center of gravity.
Creating Vertical Clearance: The hydraulic cylinder inside the cage pushes the entire upper slewing unit upward, creating sufficient space between the upper structure and the tower column.
Inserting Mast Sections: A new mast section is introduced into the open space within the cage, aligned precisely, and bolted or pinned into place to extend the tower's height.
2. Key Manufacturing Features & Technical Standards
To ensure structural integrity and absolute safety during high-altitude jacking operations, high-quality telescopic cages feature:
Advanced Fitting Precision: Manufactured using high-precision assembly fixtures to guarantee global component interchangeability for standard 1.6m and 2.0m mast section systems.
Automated Robotic Welding: Robotic welding ensures highly stable weld seams, smooth joint profiles, and reduced stress concentration points, significantly boosting fatigue resistance and productivity.
Rigorous NDT & Quality Control: All critical structural welds undergo Non-Destructive Testing (NDT), alongside strict paint thickness testing to guard against corrosion in harsh job site conditions.
3. Common Specifications & Customization
Standard Dimensions: Designed to match standard tower crane mast profiles, most commonly 1.6m x 1.6m and 2.0m x 2.0m outer dimensions.
Application Flexibility: Adaptable for flat-top, hammerhead, and luffing jib cranes across various lifting capacities.
