Closure Plug Security Cap for Tight-Space Anti-Loosening
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Solution Overview
Problem
Existing security devices for fluid-conveying plugs, such as pipe plugs, suffer from difficulties in mounting due to protruding parts and limited space constraints, and lack effective security against unauthorized loosening, especially in tight spaces.
Innovation Solution
A security device featuring a cap with constraining means, including a screw with a conical activating head that requires a specialized tool for access, allowing direct fixing and rotation while preventing axial movement, and a lid for protection from environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional security caps with protruding slots are used, then security against unauthorized loosening is provided, but mounting becomes difficult in limited spaces
Solution Approach 1:
The protruding slots are completely removed from the cap design. Instead, the security function is achieved through a smooth cap surface combined with a specialized locking screw that has a non-standard head requiring a specific tool for activation. This extraction of the protruding feature eliminates the mounting difficulty while preserving security through the specialized screw mechanism.
Solution Approach 2:
Instead of providing access through protruding slots as in traditional designs, the invention inverts the approach by providing a smooth surface with no openings, and securing it through a specialized screw mechanism that requires a specific tool. The security is achieved not by what is exposed but by what is concealed and requires special access.
2Ease of manufacture
If protruding slots are provided on the cap, then locking screw can be mounted, but the cap cannot be easily accessed in tight spaces
Solution Approach 1:
The protruding slots are completely removed from the cap design. Instead, the security function is achieved through a smooth cap surface combined with a specialized locking screw that has a non-standard head requiring a specific tool for activation. This extraction of the protruding feature eliminates the mounting difficulty while preserving security through the specialized screw mechanism.
Solution Approach 2:
The invention moves the interaction point from the cap surface (2D) to the interior screw mechanism (3D). The smooth cap surface requires no access, while the locking function is achieved through the specialized screw head that engages with a tool in three-dimensional space, allowing operation in tight spaces.
3Reliability
If conventional security devices are used, then plug protection is provided, but unauthorized access cannot be fully prevented
Solution Approach 1:
The specialized tool acts as an intermediary between the authorized user and the locking mechanism. The tool with the complementary conical head is required to activate the locking screw, creating a controlled access pathway that prevents unauthorized operation while maintaining a relatively simple overall device structure.
Solution Approach 2:
The invention changes the geometric parameter of the screw head to a non-standard conical shape, which fundamentally alters the access requirements. This parameter change ensures that only a tool with the matching conical interface can activate the mechanism, providing security without requiring complex multi-component systems.
Data Source
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AI summary
A device for fastening closure plugs (2) of conveying fluid members against undue loosening after assembling is described, comprising a security cap (10) adapted for preventing the undesirable access to the activating head of the plug and characterized by comprising means (20) for rotatably constraining the cap (10) on the plug, the means being fixed directly to the plug (2).