Multi-Tool Boring Assembly for Rapid Tool Changes and Alignment
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Solution Overview
Problem
Conventional tunnel boring and underground pipe installation processes are slow and require multiple types of complex and expensive equipment, leading to inefficiencies and misalignment issues due to frequent equipment switching.
Innovation Solution
A multi-tool boring system comprising a track assembly, jacking frame, and impact plate assembly, which supports interchangeable tools like a pneumatic rammer and hydraulic drive, enabling various operating modes such as pilot tube installation, auger boring, and non-contact boring, with rapid tool changes possible in minutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different types of equipment are used for tunnel boring and pipe installation, then various operations (casing pushing, dirt removal) can be performed, but the process becomes slow and complex due to frequent equipment switching
Solution Approach 1:
The patent implements a universal boring system with a common carrier that can accommodate multiple tool types (augers, rammers, bursters, etc.) through standardized mounting interfaces. This allows a single piece of equipment to perform multiple functions including casing installation, soil removal, and pipe bursting, eliminating the need for multiple specialized machines while maintaining operational versatility
Solution Approach 2:
The system divides the boring operation into separate modular tools (augers for soil removal, rammers for casing installation, bursters for pipe bursting) that can be independently selected and attached to the carrier based on the specific operation required, allowing flexible configuration without increasing overall system complexity
2Adaptability or versatility
If equipment is switched frequently during tunnel boring operations, then different operations can be performed, but alignment issues and time loss occur
Solution Approach 1:
The system pre-configures standardized mounting interfaces and alignment features on the carrier and tools before operations begin. Tools are designed with pre-machined mounting surfaces and alignment pins that automatically guide proper positioning when attached to the carrier, eliminating the need for time-consuming field alignment adjustments during equipment switching
Solution Approach 2:
The universal carrier with standardized interfaces allows any tool to be quickly attached and aligned in a consistent manner, reducing the time required for equipment switching while maintaining the ability to perform different operations as needed
3Reliability
If multiple specialized equipment types are used, then specific operations can be optimized, but the overall system becomes expensive and complex
Solution Approach 1:
The patent creates a reliable universal system where the common carrier and standardized tool interfaces ensure consistent performance across different operations. Each tool is optimized for its specific function (auger for drilling, rammer for installation) but all tools share the same mounting and control system, providing reliability through standardization rather than through multiple specialized complex systems
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
Enables fast and efficient installation and replacement of tools, reducing setup times from days to hours, and maintaining alignment and functionality across different configurations.
Implementation Method 1
an impact plate assembly, which is attached to the jacking frame and comprises an impact plate and a plurality of shock absorbers positioned between the impact plate and the jacking frame
Data Source
AI summary
Described herein are multi-tool boring systems and methods of operating such systems for tunnel boring and/or underground pipe installation. A multi-tool boring system is specially configured for fast installation and replacement of various tools, such as a pneumatic rammer and a hydraulic drive, enabling different operating modes of the system, e.g., pilot tube installation, auger boring, pipe ramming, pilot pullback boring, static pipe bursting, and non-contact boring. In some examples, a multi-tool boring system comprises a track assembly, a jacking frame slidably supported on the track assembly, and an impact plate assembly, which is attached to the jacking frame and comprises an impact plate and shock absorbers between the impact plate and the jacking frame. The impact plate comprises an impact plate opening configured to engage and support a pneumatic rammer. The rammer can be replaced with a hydraulic drive with a shaft protruding through the opening.