Ball Valve Cap with Key-Operated Internal Shaft Engagement
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Solution Overview
Problem
Existing ball valves are vulnerable to unauthorized manipulation due to exposed rotating shafts, allowing unscrupulous individuals to open or close the valve, causing disturbances and problems.
Innovation Solution
A cap with internal means to engage and secure the rotating shaft, accessible via a key through an opening at the cap's top, featuring a tubular non-rotating bush, a discoidal head screw, and a stop mechanism on the tubular body to prevent unauthorized access, combined with butterfly-type wings and notches for secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotating shaft is exposed for operation, then the valve can be easily operated, but unauthorized personnel can manipulate the valve causing disturbances
Solution Approach 1:
The operating mechanism is divided into two separate components: a cap that covers the rotating shaft and can be manipulated by authorized personnel, and the shaft itself that remains protected within the tubular body. The cap segments the access path, allowing operation only when deliberately removed or opened by someone with knowledge of the securing mechanism.
Solution Approach 2:
The cap acts as an intermediary element between the operator and the rotating shaft. It provides a protected interface that requires deliberate action (removal or opening) to access the shaft, thereby preventing accidental or unauthorized manipulation while still allowing easy operation by authorized users.
2Object-affected harmful factors
If the rotating shaft is covered to prevent unauthorized access, then security is improved, but the valve becomes harder to operate
Solution Approach 1:
The cap is designed to be dynamically removable or openable by authorized personnel, transforming from a static protective cover into an accessible interface. This dynamic characteristic allows the system to switch between secured (preventing unauthorized access) and operational (allowing easy manipulation by authorized users) states.
Solution Approach 2:
The cap incorporates self-contained operating features including integrated handles, keys, or manipulation mechanisms that allow authorized users to directly operate the valve without requiring external tools or assistance. The cap serves itself as both the protective cover and the operating interface.
3Object-affected harmful factors
If a secure covering mechanism is added to the shaft, then unauthorized access is prevented, but the device complexity increases
Solution Approach 1:
The cap combines multiple functions into a single component: it serves as the protective cover, the operating interface, and the securing mechanism all in one piece. This merging eliminates the need for separate complex assemblies of covers, handles, locks, and manipulation mechanisms that would otherwise be required.
Solution Approach 2:
The cap is designed as a multi-functional element that performs protection, operation, and securing functions simultaneously. Its universal design allows it to work with various shaft configurations and valve types, reducing overall system complexity while maintaining security and ease of operation.
Data Source
Figure 1~5
AI summary
The undesired manipulation of the ball valves that have a visible lever for the action may cause problems and also serious accidents. These drawbacks or problems, and others that are derived from them, can be solved with the valve described in this invention, which has a cap (5) covering the part of the shaft (3) projecting from the tubular body (1) and which has inside means to engage to the shaft (3) and turn it and also means to secure it on the shaft (3) that can be manipulated from outside using a key (M) that accesses it through an opening (15) at the top of the cap (5).