Security Cap Latch Mechanism for Pipe End
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Solution Overview
Problem
Existing security caps for pipe openings in industries like oil and gas are prone to rust, jamming, and vandalism due to exposure to atmospheric and solvent conditions, requiring complex mechanisms that are difficult to operate when rusted or jammed, and often necessitate additional effort and time to secure or access.
Innovation Solution
A security cap design featuring an inner and outer cap assembly with a protected latch system, driven by a rotation mechanism that engages and disengages via a radial movement, incorporating a locking assembly for default biasing into a locked configuration and an unlocking assembly for controlled access, with seals for a sealed closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If locks are exposed to the atmosphere and solvent, then they can be easily accessed and operated, but they become prone to rust, jamming, and vandalism
Solution Approach 1:
The patent introduces an intermediary mechanism where the latch is operated indirectly through a pulling action on a tail or handle that extends through the cap. This mediator allows the user to operate the latch without direct exposure to environmental elements, while the latch itself remains protected inside the cap structure, resolving the contradiction between accessibility and resistance to environmental damage.
Solution Approach 2:
The cap structure acts as a protective shell that encloses the latch mechanism. This shell protects the internal components from atmospheric exposure and solvent contact, preventing rust and jamming while still allowing operation through the designed interface (tail or handle) that extends through the cap.
2Reliability
If complex mechanisms are used to secure the cap, then security is improved, but operation becomes difficult when rusted or jammed
Solution Approach 1:
The patent extracts the complex locking mechanism from the traditional key-lock system and replaces it with a simpler latch mechanism that can be operated by a direct pulling action on the tail. This extraction removes unnecessary complexity while maintaining security through the latch engagement with the pipe, and simplifies operation to a single pulling motion that is less susceptible to jamming.
Solution Approach 2:
Instead of using a key-insertion and turning mechanism, the patent inverts the approach by using a pulling action on the tail that directly actuates the latch. This inversion simplifies the operation from a multi-step key process to a single pulling motion, reducing complexity and improving ease of operation while maintaining security.
3Reliability
If traditional locks are used on security caps, then unauthorized access is prevented, but additional costs and time are required for key management and lock replacement
Solution Approach 1:
The patent employs a simple latch mechanism with a tail or handle that can be easily replaced if lost or damaged. This simple component design follows the principle of using inexpensive, easily replaceable parts rather than complex locks requiring key management. The latch provides sufficient security while minimizing time loss through simple replacement procedures.
Data Source
AI summary
A security cap (1) for selectively closing an open end (3) of a pipe (5). The security cap (1) includes inner and outer cap assemblies (7, 11), at least one latch (17), and a driving assembly (21). The outer cap assembly (11) is rotatable with respect to the inner cap assembly (7), and along with it, is intended to cover the open end (3) of the pipe (5). Each latch (17) is cooperable with the inner and outer cap assemblies (7, 11), and displacable with respect to the cap assemblies (7,11) so as to be operated between first and second configurations, wherein in the first configuration, each latch (17) is drawn away from an outer groove (19) of the open end (3) of the pipe (5) thereby enabling the security cap (1) to be removed from the open end (3) of the pipe (5), and wherein in the second configuration, each latch (17) is engaged with the outer groove (19) thereby preventing the security cap (1) from being removed from the open end (3) of the pipe (5). The driving assembly (21) is operatively disposed between the inner and outer cap assemblies (7, 11), and cooperable with the same, as well as with the at least one latch (17), for selectively driving each latch (17) between the first and second configurations via a given rotation of the outer cap assembly (11) with respect to the inner cap assembly (7) of the security cap (1).