V-Prime Rubber End Cap for Linear Shaped Charge Initiation
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Solution Overview
Problem
Existing methods for assembling linear shaped charges (LSCs) are unreliable, unsafe, and inefficient due to the use of tape for attaching explosive components, which can lead to insecure booster attachment, increased run-up distance, and over priming, posing risks during handling and operation.
Innovation Solution
A V-Prime apparatus featuring a rubber end cap with a hollow neck that securely houses a detonator cord and explosive sheet booster, providing a direct and secure contact with the LSC, reducing run-up distance, and allowing for safer handling and more efficient initiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tape is used to attach explosive sheet booster and detonator to LSC, then assembly can be performed in field setting, but the attachment becomes unreliable and insecure
Solution Approach 1:
A coupling structure acts as an intermediary component between the LSC and the initiator assembly (detonator and explosive sheet booster). This coupling structure provides a secure mechanical interface that replaces unreliable tape attachment while maintaining field assembly capability. The coupling structure includes features such as interference fits, mechanical locks, or positive engagement mechanisms that ensure reliable connection without requiring complex tools or procedures.
2Ease of operation
If explosive sheet booster is placed across the end of LSC, then assembly is simplified, but the shock front transmission becomes less efficient and run-up distance increases
Solution Approach 1:
The coupling structure positions the explosive sheet booster with its interface oriented perpendicular to the LSC axis, creating optimal local geometry for shock front transmission. This local quality improvement ensures that the detonation wave from the LSC directly engages the booster interface at the correct angle, maximizing energy transfer efficiency and minimizing run-up distance while maintaining assembly simplicity through the integrated coupling design.
3Reliability
If LSC metal wall is filed or parts removed to access explosive core, then direct contact with explosive core is achieved, but safety risks increase significantly
Solution Approach 1:
The coupling structure serves as a safe intermediary that provides direct contact between the initiator assembly and the explosive core without requiring personnel to file or remove LSC metal wall. The coupling structure includes features such as insertion channels, alignment features, and secure retention mechanisms that enable reliable initiator placement while keeping hands and tools away from exposed explosive material, thereby eliminating the safety hazards associated with metal filing and explosive exposure.
4Device complexity
If explosive components are assembled using tape, then device complexity is reduced, but the overall system becomes less safe during handling
Solution Approach 1:
The system is segmented into distinct modular components: the LSC, the coupling structure, and the initiator assembly (detonator and explosive sheet booster). This segmentation allows each component to be optimized for its specific function while providing safe interfaces between them. The coupling structure acts as a safety-containing intermediary that secures explosive components through mechanical means rather than tape, reducing handling safety risks while maintaining reasonable device complexity through modular design.
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 V-Prime apparatus enhances the reliability, safety, and performance of LSCs by ensuring secure attachment of explosive components, reducing run-up distance, and enabling safer handling and initiation from a distance.
Implementation Method 1
linear shaped charge (LSC)
Implementation Method 2
initiator structure that improves initiation and detonation of a linear shaped charge
Data Source
AI summary
Generally, embodiments of the invention can include a linear shaped charge (LSC) end cap coupling structure adapted for holding an initiator structure adapted to initiate a booster explosive material, the booster explosive material, and the LSC in abutting contact with each other. One embodiment includes a rubber body formed with cavities adapted to receive the LSC, booster, and initiator structure (e.g., detonation cord). One internal cavity can be formed with a plurality of flexible protrusions or fins which are oriented towards a center axis of the preferred embodiment of three cavities configured to impart an interference fit with the initiator structure. Methods related to the invention are also provided.