Telescopic Hot Tapping Drill Shafts for Confined-Space Drilling
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Solution Overview
Problem
Conventional hot tapping drills are unable to operate in confined spaces, such as excavations near other utilities, due to limited space and interference with existing infrastructure.
Innovation Solution
A hot tapping drill apparatus featuring telescopically arranged secondary rotation and translation shafts with independent actuation, allowing for compact design and operation in confined spaces while maintaining torque transmission and drilling capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional hot tapping drills are used, then drilling capability and torque transmission are maintained, but the device cannot operate in confined spaces due to limited space and interference with existing infrastructure
Solution Approach 1:
The drill apparatus employs telescopic shafts where the secondary translation shaft is nested within the primary translation shaft, and the rotation shaft is nested within the translation shaft. This nesting arrangement allows the drill to achieve its full operational length during drilling while maintaining a compact retracted profile for transport and storage, enabling operation in confined spaces without sacrificing drilling capability
Solution Approach 2:
The drill apparatus uses extendable telescopic shafts that can dynamically change length between a compact retracted state for navigation through confined spaces and an extended state for performing drilling operations. The shafts include guide bars and bearing assemblies that enable smooth extension and retraction while maintaining structural integrity and torque transmission capability
2Volume of moving object
If the drill apparatus is made compact for confined space operation, then space requirements are reduced, but torque transmission and drilling control may be compromised
Solution Approach 1:
The telescopic shafts are designed with nested secondary shafts within primary shafts, where each shaft is dimensioned and keyed to transmit torque effectively. The nested arrangement allows the drill to achieve its full operational length during drilling while maintaining a compact retracted profile for transport and storage, enabling operation in confined spaces without sacrificing drilling capability
Solution Approach 2:
The translation shaft is divided into multiple telescopic segments (primary and secondary translation shafts) that can extend and retract independently. Each segment is equipped with keyed connections and guide bars that ensure proper alignment and torque transmission. This segmentation allows the drill to achieve a compact profile for confined space operation while maintaining full torque transmission capability when extended for drilling operations
3Volume of moving object
If telescopic shafts are used to enable confined space operation, then device compactness is improved, but device complexity increases due to additional components
Solution Approach 1:
The telescopic shafts are designed with nested secondary shafts within primary shafts, where each shaft is dimensioned and keyed to transmit torque effectively. The nested arrangement allows the drill to achieve its full operational length during drilling while maintaining a compact retracted profile for transport and storage, enabling operation in confined spaces without sacrificing drilling capability
Solution Approach 2:
The rotation shaft is integrated within the telescopic translation shaft assembly, combining the rotational drive function with the telescopic translation mechanism. This merging of functions reduces the number of separate components and simplifies the overall structure while maintaining the ability to provide both rotational torque and linear positioning control
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 hot tapping operations in spaces where conventional drills cannot operate, providing improved drilling control and compactness without sacrificing drill distance or torque, facilitating safer and more efficient maintenance in confined environments.
Implementation Method 1
comprising at least two secondary translation shafts telescopically arranged via a complementary threaded engagement to allow for telescopic translation of the secondary translation shafts due to relative threaded rotation
Data Source
AI summary
A hot tapping drill apparatus comprising a housing, a rotation shaft arranged within the housing and comprising at least two secondary rotation shafts telescopically arranged and keyed to allow transmission of torque, one end of the rotation shaft extending outside the housing and configured to operatively receive a drill bit, in use. The drill apparatus also includes a translation shaft arranged within the housing and comprising at least two secondary translation shafts telescopically arranged via a complementary threaded engagement to allow for telescopic translation of the secondary translation shafts due to relative threaded rotation. Also included is a link assembly linking the rotation and translation shafts to allow independent rotation of the rotation shaft while coupling translation of both shafts.