Single-Actuator Multi-Valve Assembly for Safe Bleed Sequencing
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Solution Overview
Problem
Conventional double block and bleed valve manifolds require complex actuation sequences to ensure safe maintenance, but accidental deviations in these sequences can lead to risks such as fugitive emissions, user exposure, and contamination.
Innovation Solution
A valve assembly with a single actuator mechanism that simultaneously controls and restricts the positions of multiple valves, preventing undesirable position combinations and simplifying the actuation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple independent valve actuators are used to control each valve separately, then each valve can be operated independently, but the complexity of the actuation sequence increases and the risk of accidental position combinations increases
Solution Approach 1:
The patent combines multiple independent valve actuators into a single integrated actuator mechanism that controls all three valves (first block valve, second block valve, and bleed valve) simultaneously. This single actuator mechanism includes interconnected components that ensure the valves move in coordinated sequences, eliminating the need for complex manual actuation sequences while preventing unsafe valve position combinations through mechanical interlocking.
Solution Approach 2:
The patent introduces an intermediary mechanism within the single actuator that mediates the interaction between the three valves. This intermediary component ensures that the bleed valve cannot be opened unless both block valves are closed, and that the valves follow the correct actuation sequence. The intermediary mechanism acts as a mechanical controller that enforces safe operating procedures automatically.
2Device complexity
If a single actuator mechanism controls multiple valves, then the actuation process is simplified and safety is improved, but the device complexity increases
Solution Approach 1:
The single actuator mechanism is segmented into distinct functional components, each responsible for controlling a specific valve. The actuator includes separate but interconnected elements that can independently control the first block valve, second block valve, and bleed valve while remaining part of a unified mechanism. This segmentation allows for modular design and easier maintenance while maintaining the simplified operation benefit.
3Manufacturing precision
If conventional multiple actuators are used, then each valve can be precisely controlled, but the actuation sequence requires complex procedures and increases risk of errors
Solution Approach 1:
The single actuator mechanism is pre-configured with mechanical linkages and interconnections that automatically enforce the correct actuation sequence. Before operation, the actuator is set up so that moving the actuator in a specific direction automatically closes the first block valve, then the second block valve, and finally opens the bleed valve in the correct sequence. This preliminary configuration eliminates the need for operators to remember complex procedures and reduces actuation time while maintaining precise valve position control.
Data Source
AI summary
A valve assembly includes multiple valves operatively connected with a single valve actuator operable to control and restrict the corresponding positions of each of the multiple valves.