Top-Down Pipeline Installation in Conduits for Rockfall Shielding
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Solution Overview
Problem
Existing methods for installing large-diameter pipelines, such as penstocks in hydropower plants, within inclined or vertical conduits pose significant risks due to rockfall, which can endanger workers and equipment.
Innovation Solution
A system for installing pipelines within conduits that involves starting from the top end of the conduit, where a first pipe segment is secured, and subsequent segments are lifted and welded to the lower rim of the previously installed segment, providing a protective shield against rockfall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bottom-up installation method is used, then equipment and materials can be easily accessed at the starting point, but workers are exposed to rockfall hazards within previously installed pipe segments
Solution Approach 1:
The patent inverts the traditional installation sequence by installing pipe segments from top to bottom instead of bottom to top. This reversal allows workers to install segments in a protected environment where previously installed segments serve as shields against rockfall, while still maintaining equipment accessibility through the open conduit above.
Solution Approach 2:
The patent converts the harmful rockfall risk into a beneficial protective feature. Previously installed pipe segments, which would normally just be structural elements, now serve as protective shields that deflect rockfall away from workers and equipment in the installation zone below.
2Object-affected harmful factors
If top-down installation method is used, then workers are protected from rockfall by previously installed segments, but equipment accessibility and installation complexity increase
Solution Approach 1:
The patent divides the installation system into modular components including separate lifting mechanisms, positioning devices, and welding equipment that can be independently controlled. This segmentation allows complex top-down installation to be managed through coordinated simple operations at each stage.
Solution Approach 2:
The patent introduces intermediary equipment such as lifting mechanisms and positioning devices that mediate between the heavy pipe segments and the workers. These intermediaries handle the complex tasks of raising and aligning segments, reducing the operational complexity for workers.
3Productivity
If conventional bottom-up method is used, then installation process is straightforward, but serious risks exist for workers and equipment due to rockfall
Solution Approach 1:
The patent implements preliminary protective actions by installing the first pipe segment at the top of the conduit before any subsequent segments are handled. This creates an immediate protective environment for the installation zone, allowing subsequent segments to be installed safely without exposing workers to rockfall hazards.
Solution Approach 2:
The previously installed pipe segments serve as beforehand cushioning or protective barriers against rockfall. Each newly installed segment immediately provides protection for the installation zone below, creating a cumulative safety shield that increases reliability as installation progresses.
Data Source
AI summary
A system for transporting equipment and individuals within a conduit and/or a pipeline. The system includes a ground floor, a first floor, a connecting rod, an ovality compensation mechanism, a couple of holding arms at a top end of the system, and a winch. The ground floor and the first floor are configured to receive and keep an operator onto them. The ovality compensation mechanism is attached to a lower side of the first floor by utilizing a couple of connecting chains. The ovality compensation mechanism is configured to increase a diameter of a pipe segment of the pipeline.