Initiation Charge for Reliable Detonation of Explosive-Filled Objects
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Solution Overview
Problem
Existing methods for destroying explosive-filled objects, such as artillery shells, face challenges with thick casings or poorly stored explosives that are difficult to detonate externally, and require continuous heating to initiate detonation, leading to increased wear on destruction facilities and environmental concerns with improper disposal.
Innovation Solution
The method involves adding an initiation charge to the material for destruction, which is lowered into a detonation chamber on a cable serving as both a lowering and ignition source, and optionally placing it in a container with a gel explosive and electrical igniter, ensuring reliable detonation even with poor-quality explosives, while minimizing facility wear and enabling recycling of scrap metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external heating is used to initiate detonation of explosive-filled objects, then the method is simple and does not require additional initiation charges, but it fails to reliably detonate objects with thick casings or poor-quality explosives
Solution Approach 1:
An initiation charge is introduced as an intermediary substance between the external heating source and the main explosive charge. The initiation charge has lower ignition temperature and higher sensitivity, serving as a mediator that reliably triggers detonation of the main explosive even when external heating alone is insufficient due to thick casings or poor explosive quality.
Solution Approach 2:
The initiation charge is placed in direct contact with or close proximity to the main explosive charge before the destruction process begins. This preliminary positioning ensures that when external heating is applied, the initiation charge is the first to reach its activation temperature and immediately trigger the main explosive, eliminating the unreliability of direct external heating.
2Reliability
If continuous external heating is applied to ensure detonation of difficult-to-detonate explosives, then reliable initiation is achieved, but wear and tear on the destruction chamber increases
Solution Approach 1:
The initiation charge is pre-positioned with the explosive material before destruction. This allows detonation to occur rapidly once activated, eliminating the need for prolonged heating cycles. The destruction chamber undergoes fewer thermal cycles, reducing thermal fatigue and extending its service life.
Solution Approach 2:
Instead of applying continuous heating over an extended period, the initiation charge enables a rapid, concentrated energy release that skips through the heating phase and directly achieves detonation. This reduces the duration of high-temperature exposure for the destruction chamber, minimizing thermal damage accumulation.
3Strength
If thick protective casings are present on explosive-filled objects, then structural integrity and safety during storage are improved, but the explosives become difficult to detonate and initiate
Solution Approach 1:
The initiation charge acts as an intermediary that bridges the gap created by the thick protective casing. It is positioned to be in direct contact with the explosive charge, allowing it to transfer energy directly to the explosive without needing to penetrate or heat through the thick casing walls, thus maintaining both protective capability and detonation reliability.
Solution Approach 2:
The initiation function is extracted from the external heating system and embedded within the explosive assembly itself via the initiation charge. This separates the initiation function from the casing penetration requirement, allowing the thick casing to remain intact for protection while the initiation charge reliably triggers detonation through direct contact with the explosive charge.
4Reliability
If initiation charges are added to each explosive-filled object, then reliable detonation is achieved, but the complexity of the destruction process and equipment increases
Solution Approach 1:
The cable serving as the lowering mechanism for the destruction chamber also functions as the electrical ignition cable for the initiation charge. This multi-functionality eliminates the need for separate ignition wiring, reducing equipment complexity while maintaining reliable detonation initiation.
Solution Approach 2:
The lowering and ignition functions are merged into a single cable system. The cable performs dual roles: mechanically lowering the explosive-filled object into the destruction chamber and electrically igniting the initiation charge. This consolidation simplifies the overall system architecture and reduces the number of components required.
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
This approach ensures reliable initiation and conversion of explosives into harmless scrap metal, reducing facility wear and allowing for environmentally safe disposal and recycling of valuable materials, addressing the challenges of thick casings and poor-quality explosives.
Implementation Method 1
an initiation charge is added to the material for destruction, which instead of been thrown down into a bed of hot scrap is then lowered or hoisted down into the detonation chamber
Implementation Method 2
an electrical igniter, which in turn is connected to a lowering cable that also serves as electrical ignition cable for the electrical igniter
Implementation Method 3
placing the material for destruction in such a container or box together with an additional initiation charge affords several advantages
Data Source
AI summary
The present invention relates to a method and an arrangement in the destruction of explosive-filled objects (8), such as various types of ammunition components, in a detonation chamber (1) intended for this purpose, for ensuring that the constituent explosives of the material for destruction are rapidly made to detonate at the most advantageous point in the detonation chamber with regard to the wear and tear on the detonation chamber.