Gunpowder Injector Structure for Clean Pressurization
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Solution Overview
Problem
Existing injectors using gunpowder combustion for pressurization face challenges in minimizing the impact of combustion products on the injection substance, leading to suboptimal pressurization and potential contamination, as well as noise leakage.
Innovation Solution
A configuration where gunpowder is stored in a first space with a partition member that breaches under pressure, encapsulating combustion products in a second space within the case, allowing the case to extend and actuate the piston for efficient pressurization without contaminating the injection substance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If gunpowder is used as a pressurization source in an injector, then pressurization of the injection solution is achieved, but combustion products may mix with the injection solution causing contamination
Solution Approach 1:
The combustion chamber is divided into a first space for storing gunpowder and a second space for containing combustion products, separated by a partition member. This segmentation prevents combustion products from mixing with the injection solution while maintaining pressurization capability.
Solution Approach 2:
The harmful combustion products are extracted and isolated into a separate enclosed second space within the case, removing them from contact with the injection solution while retaining their pressure-generating function.
2Object-affected harmful factors
If a bellows-shaped cup is used to encapsulate combustion products, then contamination is prevented, but the combustion rate slows down due to increased internal space capacity
Solution Approach 1:
The combustion chamber is segmented into two distinct spaces: a compact first space for gunpowder storage that maintains high combustion rate, and a separate second space for encapsulating combustion products. This segmentation allows both rapid combustion and product encapsulation to coexist.
Solution Approach 2:
A partition member acts as an intermediary barrier between the gunpowder storage space and the combustion product containment space, enabling the combustion products to be enclosed without interfering with the combustion process in the first space.
3Strength
If the partition member is made rigid to maintain structure, then space definition is clear, but the partition member may breach under pressure rise
Solution Approach 1:
The partition member is designed with controlled breach characteristics, where its structural parameters (thickness, material properties, geometry) are optimized to maintain integrity during normal operation but allow controlled failure mode under excessive pressure, preventing catastrophic failure while maintaining clear space definition during normal function.
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 design enables rapid and effective pressurization of the injection substance while keeping combustion products contained, reducing contamination risks and noise leakage, ensuring reliable and hygienic delivery.
Implementation Method 1
gunpowder combustion
Implementation Method 2
a combustion product of the gunpowder is continuously encapsulated inside the second space
Implementation Method 3
an extending section which, due to a rise in pressure inside the second space by gunpowder combustion in the ignition device, extends in an approach direction in which a part of the case approaches a prescribed end section of the piston
Data Source
AI summary
An injector can include an ignition device having a partition member which forms a first space to store a gunpowder and which is formed of a prescribed rigid material such that the partition member is breached based on a rise in pressure of the first space when the gunpowder is burned. The injector can also include a case including a base section fixed on a side of the ignition device. The case can be arranged in a space inside the injector main body so as to cover the ignition device. The case can define a second space with the partition member of the ignition device and encapsulate, inside the second space, a combustion product of the gunpowder. When the gunpowder burns in the ignition device and pressure inside the second space rises, a part of the case extends so as to approach a prescribed end section.