Process Valve Actuator Closure With Rotary Locking Hooks
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Solution Overview
Problem
Existing valve actuators lack adequate assembly safety, are prone to accidental opening, and have poor inspection, repairability, and recyclability, which affects their environmental footprint.
Innovation Solution
A valve actuator design featuring a locking mechanism with rotary and axial movements, including spring-loaded locking hooks and seals, ensures secure assembly and easy disassembly, allowing for inspection and replacement of components while enhancing environmental sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple locking mechanism is used, then assembly is easy, but assembly safety is insufficient and accidental opening occurs
Solution Approach 1:
The locking mechanism transitions from a static simple lock to a dynamic system with spring-loaded hooks that can move between locked and unlocked positions. The spring force provides automatic engagement and disengagement capabilities, enhancing reliability while maintaining operational simplicity.
Solution Approach 2:
The closure is divided into multiple independent locking hooks rather than a single locking element. This segmentation allows each hook to function independently, providing enhanced safety through redundancy while keeping individual hook structures simple.
2Reliability
If a secure locking mechanism is used, then assembly safety is improved, but inspection and repairability deteriorate
Solution Approach 1:
The spring-loaded locking hooks automatically engage with the recesses when the closure is assembled, providing self-locking functionality. For inspection and repair, the simple rotational movement allows operators to easily disengage the locks themselves without requiring special tools or complex procedures.
Solution Approach 2:
The dynamic spring mechanism allows the locking hooks to be easily disengaged by rotating the closure, enabling quick access for inspection and repair while maintaining secure locking during normal operation.
3Reliability
If the closure is firmly locked, then assembly safety is improved, but disassembly for inspection becomes difficult
Solution Approach 1:
The locking mechanism uses spring force to maintain firm engagement during normal operation, but the same spring force enables easy disengagement through rotational movement. The dynamic nature allows the system to be firmly locked during operation but easily opened when needed for inspection.
Solution Approach 2:
The locking and unlocking operations occur in periodic cycles: rotation into the locked position engages the spring-loaded hooks firmly, and rotation in the opposite direction disengages them for inspection. This periodic action alternates between secure locking and easy disassembly states.
4Ease of manufacture
If no seal destruction mechanism is used, then the structure is simpler, but tracking warranty claims and inspection status becomes difficult
Solution Approach 1:
The seal provides a visual indicator through its integrity or destruction state. When the seal is intact, it indicates the actuator has not been opened; when destroyed during the unlocking process, it clearly shows that inspection or repair has occurred, providing traceability for warranty claims.
Solution Approach 2:
The seal is intentionally designed to be destroyed during the unlocking process. This harmful effect (seal destruction) is converted into a beneficial tracking mechanism that provides clear visual information about the inspection status and enables warranty claim verification.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves assembly safety, reduces accidental opening, facilitates easy inspection and repair, and enhances recyclability, thereby improving the environmental footprint of the valve actuator.
Implementation Method 1
a compression spring which is supported on the pneumatic piston and on the actuator housing
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A valve actuator (4) for a process valve (2) is described. This comprises a drive housing (100) with an opening (102) leading into an interior (104) of the drive housing (100), and a closure (200) closing the opening (102) of the drive housing (100), wherein in a locked state of the drive housing (100) and the closure (200) at least one locking hook (206a-d) of the closure (200) engages with at least one recess (106a-d) of the drive housing (100), and wherein, for unlocking the drive housing (100) and the closure (200), the at least one locking hook (206a-d) moves out of the recess (106a-d) of the drive housing (100) by means of a relative rotational movement about an imaginary axis of rotation (S) between the drive housing (100) and the closure (200).