Security Blow-Out-Proof Valve Assembly Stem Locking
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Solution Overview
Problem
Ball-valve assemblies face structural weakness at the valve stem due to high fluid pressure, and there is a need for a mechanism to lock the valve in specific positions to prevent unauthorized operation.
Innovation Solution
A security blow-out-proof valve assembly with a T-head that rotates the blow-out-proof stem to move the ball valve between open and closed positions, featuring a lock and detent system to secure the T-head in defined positions, ensuring only authorized personnel can change the valve's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve stem is made removable or simplified for ease of operation, then ease of operation is improved, but the structural strength and reliability under high pressure deteriorate
Solution Approach 1:
The valve stem is divided into multiple segments or sections that can be assembled and disassembled without compromising the overall structural integrity. This segmentation allows for easier operation and maintenance while maintaining strength through proper connection mechanisms between segments.
Solution Approach 2:
The valve stem is pre-assembled with reinforcement features or pre-installed with sealing and locking mechanisms that ensure structural strength is maintained before operation begins. This preliminary preparation allows the valve to be strong when needed while remaining operable.
2Reliability
If the valve stem is made fixed and robust to prevent failure under pressure, then reliability is improved, but ease of operation and maintenance deteriorate
Solution Approach 1:
The valve stem incorporates dynamic features that allow it to transition between fixed robust positions for reliability and movable states for operation. This could include controlled flexibility or adjustable locking mechanisms that provide rigidity when needed but allow movement during normal operation.
Solution Approach 2:
The valve stem includes self-lubricating or self-adjusting features that maintain reliability without requiring frequent manual intervention or complex operation procedures, thereby preserving ease of operation while ensuring robust performance.
3Reliability
If a locking mechanism is added to secure the valve in specific positions, then security and reliability are improved, but device complexity increases
Solution Approach 1:
The locking mechanism is merged with existing valve components rather than being added as a separate system. This integration allows the valve to achieve secure locked positions while minimizing additional complexity by utilizing the same structural elements for both valve operation and locking functions.
Solution Approach 2:
The locking mechanism serves multiple functions: it secures the valve in open and closed positions, provides mechanical advantage for operation, and may serve as part of the sealing system. This multi-functionality reduces overall device complexity while enhancing security and reliability.
Data Source
AI summary
A security blow-out-proof valve assembly is provided that includes a valve body, valve stem, and a head. The valve body contains a valve member movable between open and closed positions within the valve body. The valve stem extends from the valve body and moves the valve member between open and closed positions within the valve body. The head located on the valve stem is selectively movable relative to the valve stem and selectively moves the valve stem. When the head selectively moves the valve stem the head moves the valve member between open and closed positions.