Suspension Cable Replacement With Hydraulic Tension Adjustment
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Solution Overview
Problem
Conventional methods for replacing suspension cables in bridges face challenges with low accuracy, high labor costs, and prolonged construction times due to difficulties in controlling the height of pocket hanging and temporary hanger rods during cable erection.
Innovation Solution
A suspension cable replacement device equipped with a power unit and adjustment units, including hydraulic jacks and a post-tension stressed oil pump, allows precise control of tension and length by displacing the suspension cable relative to the anchor, facilitating easy assembly and disassembly through hydraulic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement and conventional methods are used for cable erection, then labor cost and construction time increase, but measurement precision and control accuracy remain low
Solution Approach 1:
The patent replaces manual measurement and mechanical adjustment methods with a hydraulic control system. The hydraulic jack applies controlled force to the hanger rod, enabling precise height adjustment through fluid pressure control rather than manual mechanical operations. This substitution directly improves measurement precision while reducing the time required for cable erection.
Solution Approach 2:
The patent employs a hydraulic jack connected to a power supply device that uses hydraulic pressure to adjust the height and tension of the hanger rod. The hydraulic system provides smooth, controlled, and reversible adjustment capability, enabling precise control of pocket hanging height and temporary hanger rod positioning, thereby resolving the contradiction between measurement precision and construction time.
2Manufacturing precision
If manual adjustment methods are used for hanger rod height control, then operation complexity increases, but manufacturing precision and tension control remain low
Solution Approach 1:
The patent replaces complex manual adjustment operations with an automated hydraulic control system. The hydraulic jack, controlled by a power supply device, automatically adjusts the hanger rod tension and length to precise values. This eliminates the need for manual measurement, calculation, and iterative adjustment, thereby improving manufacturing precision while simplifying operation.
Solution Approach 2:
The hydraulic control system is designed to automatically control the hanger rod tension and length based on pre-set parameters. The system performs self-adjustment without requiring complex manual intervention, enabling precise tension and length control while reducing operational complexity. The power supply device automatically manages the hydraulic pressure to achieve the desired cable tension.
3Adaptability or versatility
If conventional pocket hanging methods are used, then device structure remains simple, but adjustment range and precision are limited
Solution Approach 1:
The patent introduces a hydraulic jack and power supply device to enable continuous and wide-range adjustment of hanger rod height. The hydraulic system provides smooth adjustment over a large range with high precision, far exceeding the limited discrete adjustment capability of conventional pocket hanging methods. The added hydraulic components increase device complexity but enable superior adaptability and adjustment range.
Solution Approach 2:
The patent transforms the static, fixed-height pocket hanging system into a dynamic, continuously adjustable system. The hydraulic jack enables real-time adjustment of hanger rod height and tension during cable erection, providing adaptability to various cable lengths and bridge configurations. This dynamic capability significantly expands the adjustment range while the modular hydraulic design keeps the added complexity manageable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device ensures accurate and efficient replacement of suspension cables with reduced labor costs and shorter construction times by enabling precise control of tension and length, meeting design specifications.
Implementation Method 1
The replacement process is performed by hydraulic pressure so that the tensioning distance can be precisely controlled.
Data Source
AI summary
A suspension cable replacement device includes a power unit and a plurality of adjustment units. The plurality of adjustment units is disposed around a suspension cable to be replaced. The power unit is configured to power the plurality of adjustment units. Each adjustment unit includes a support frame, a connector, and a steel strand. The power unit includes two jacks each including a main body. The support frame includes two support columns, a top part, and a bottom part. The top part includes a first through hole, and a nut fixed on an anchor is disposed in the first through hole; a hanger rod is disposed through the anchor and the nut, and fixed in the nut. The bottom part includes a second through hole, and the steel strand is disposed through the second through hole. The connector is disposed in the central cavity of the support frame.