Band Coupling Projection Prevents Unintended Bolt Separation
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Solution Overview
Problem
Existing band couplings for pressure containers do not adequately facilitate easy and safe attachment and detachment operations, leading to potential issues with handling and ease of use, as well as potential unintended release of internal pressure and structural integrity.
Innovation Solution
A band coupling design featuring a retainer with a tightening mechanism that includes a stopper and a pressing bolt, where the pressing bolt is caught by a projection on the retainer's second end section until completely loosened, preventing unintended separation and incorporating arcuate retainer segments with connecting members and stopper members to regulate rotation and prevent excessive opening, enhancing safety and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pressing bolt is made easily detachable from the retainer, then the detachment operation becomes easier, but the container lid may rise or the band coupling may fall off at unintended timing
Solution Approach 1:
The projection is provided in advance on the retainer at a position that will be passed by the pressing bolt during loosening. This preliminary structural arrangement ensures that when the pressing bolt is loosened, it must pass through the projection which guides its movement and prevents accidental detachment until the airtight state is intentionally released.
Solution Approach 2:
The projection acts as an intermediary element between the pressing bolt and the retainer body. It mediates the interaction by providing a catching surface that guides the pressing bolt's movement during loosening, ensuring controlled detachment only when the airtight state is properly released, thus preventing unintended release.
2Weight of moving object
If the retainer is made thin-walled for lightweight construction, then manufacturing cost and weight are reduced, but strength and structural integrity may be compromised
Solution Approach 1:
The retainer employs local quality by concentrating material thickness and structural reinforcement at critical locations such as the projection area and clamping zones, while maintaining thin-walled construction in non-critical areas. This allows the retainer to achieve lightweight overall construction while preserving necessary strength and structural integrity at key load-bearing points.
Solution Approach 2:
The retainer utilizes composite material construction combining different material properties to achieve both lightweight characteristics and high strength. By selecting appropriate materials with optimal strength-to-weight ratios and implementing strategic material distribution, the thin-walled retainer maintains sufficient structural integrity for pressure container applications.
3Adaptability or versatility
If the pressing bolt can be loosened to any position, then adjustment flexibility is improved, but the airtight state may be released at unintended timing
Solution Approach 1:
The projection is pre-positioned on the retainer to create a predetermined interaction point with the pressing bolt. This preliminary arrangement ensures that the pressing bolt's loosening movement is guided to pass through the projection, which maintains the airtight state until the projection intentionally releases the bolt, preventing unintended timing of airtight state release.
Solution Approach 2:
The projection provides mechanical feedback to the pressing bolt during loosening operation. As the pressing bolt is loosened, the projection catches and guides its movement, providing tactile and mechanical feedback that indicates the proper sequence of operations. This feedback mechanism ensures the airtight state is maintained during adjustment and only released when the projection intentionally disengages.
Data Source
AI summary
A pressure container is provided with a container body, a container lid, and a band coupling. The band coupling is provided with a retainer capable of engaging with the outer peripheries of a first flange section and a second flange section, and also with a tightening mechanism for tightening the retainer. The retainer has a first end section forming one end to which the tightening mechanism is connected, and also has a second end section forming the other end which is bent outward and faces the first end section when the retainer is tightened. The tightening mechanism is provided with a stopper rotatably mounted to the first end section of the retainer, and also with a pressing bolt engaged through thread with the stopper so as to be able to advance and recede and pressing the second end section to the first end section side with the retainer engaged with the first flange section and the second flange section. A projection section which is caught by the pressing bolt when the pressing bolt presses the second end section is provided to the second end section.