Valve Stem Locking Assembly for Tamper-Resistant Positioning
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Solution Overview
Problem
Conventional locking mechanisms for valves are inadequate in preventing accidental or malicious tampering, especially in valves without handles or after handle removal, and often require complex tools or specialized skills to operate.
Innovation Solution
A locking assembly comprising a base with a slide and a cover with engaging tabs and slots, a clamp mechanism, and a strap system that securely restricts access to the valve stem without needing unnecessary tools or skills, ensuring the valve remains locked in a predetermined position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional locking mechanisms are used to secure the valve handle, then the valve can be locked in a predetermined position, but these mechanisms are ineffective in valves without handles or after handle removal
Solution Approach 1:
The invention extracts the locking function from the handle itself and creates a separate locking assembly that can be applied to the valve stem directly. This allows the locking mechanism to function independently of whether a handle is present, making it effective for both handled and handleless valves.
Solution Approach 2:
The locking assembly is designed with universal applicability to work with different valve types and configurations. The clamp mechanism can accommodate various valve stem sizes and shapes, and the system functions whether the valve has a handle or not, providing multi-functional versatility.
2Reliability
If locking mechanisms with complex tools and specialized skills are used, then secure locking is achieved, but operation becomes difficult and requires specialized training
Solution Approach 1:
The locking assembly is designed to be self-contained and self-explanatory in its operation. The visual alignment indicators and intuitive clamp mechanism allow operators to correctly install and operate the device without specialized training or complex tools, while still achieving secure locking.
Solution Approach 2:
The invention incorporates visual indicators (such as colored alignment marks or position indicators) that change or become visible to guide the operator through the locking process. This provides immediate visual feedback to ensure correct installation and operation without requiring specialized knowledge.
3Ease of operation
If the valve stem is left accessible for operation, then the valve can be easily operated, but accidental or malicious tampering cannot be prevented
Solution Approach 1:
The locking assembly is installed and configured in advance to establish the desired valve position before operation is needed. The clamp secures the valve stem at the predetermined position, and visual indicators confirm the locked state, preventing any subsequent accidental or malicious operation until intentionally unlocked.
Solution Approach 2:
The locking mechanism applies a counter-force or restraining action in advance to prevent unwanted movement of the valve stem. The clamp physically constrains the valve stem from moving, and the visual indicators provide a warning that the valve is locked, creating a preliminary anti-action against potential tampering.
Data Source
Figure 1~3
Figure 2
Figure 2A~2C
AI summary
A method and system for restricting access to a valve stem (116) of a valve (114) by employing a valve locking assembly (104) is disclosed. The locking assembly comprises a first means (124) for receiving a valve stem of a valve and an engaging member (140). The locking assembly additionally comprises a second means (120) for receiving the valve stem of the valve and comprising a slide (128) for engaging the engaging member of the first means, the slide having a first length (132) along an outer periphery of the second means and a second length (134) intersecting the first length such that the second length is shorter than the first length. The locking assembly additionally comprises a third means (122) for releasably securing the second means in position about the valve stem of the valve, wherein the first means is capable of being positioned over the second and the third means about the valve stem.