Rising Manual Valve Stroke Limiter Design
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Solution Overview
Problem
Rising manual valves with integrated stroke limiters face challenges in compact design due to restricted access to the stop element, making it difficult to adjust the maximum spindle stroke quickly and easily, often requiring tools or partial disassembly.
Innovation Solution
A compact rising manual valve design featuring a holder for the stop element that rotates with the handwheel but remains fixed relative to the valve body, allowing easy access and adjustment without tools, combined with a coupling element for independent spindle movement to set the closed position, facilitating quick and easy stroke and closing limit adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stop element is integrated into the main valve body with fixed position, then the valve structure remains compact, but the stroke adjustment becomes difficult requiring tools or partial disassembly
Solution Approach 1:
The holder is designed to rotate with the handwheel during actuation but remain fixed in its axial position relative to the valve body, creating a dynamic component that adapts its motion characteristics based on the operational context. This allows the stop element position to be adjusted easily while maintaining compact integration during normal operation.
Solution Approach 2:
The stroke limitation function is separated into a distinct holder component that can rotate independently, rather than being permanently fixed to the valve body. This segmentation allows the stop element to be adjusted by rotating the holder without requiring disassembly of the valve body or special tools.
2Ease of operation
If the stop element is made easily accessible for adjustment, then stroke limitation can be changed quickly, but the valve size increases
Solution Approach 1:
The holder's rotational motion during handwheel actuation provides easy access to the stop element for adjustment without requiring additional space. The dynamic rotation brings the stop element into an accessible position during normal operation, eliminating the need for separate adjustment mechanisms that would increase valve volume.
Solution Approach 2:
The holder serves multiple functions: it limits the stroke by providing a stop element, it rotates with the handwheel to maintain compact integration, and it provides easy accessibility for adjustment during normal operation. This multi-functionality eliminates the need for separate adjustment mechanisms.
3Ease of operation
If the holder rotates with the handwheel during actuation, then the stop element position can be adjusted easily, but the sealing may be compromised
Solution Approach 1:
The holder is designed to rotate with the handwheel during actuation while maintaining a fixed axial position relative to the valve body. This dynamic behavior ensures that the stop element remains properly positioned for sealing purposes while allowing easy adjustment during normal operation.
Solution Approach 2:
The holder is pre-configured with the stop element at the correct position before actuation begins. During rotation, the stop element maintains proper alignment with the spindle, ensuring sealing integrity is preserved throughout the adjustment process.
Data Source
AI summary
The valve (1) has a valve main body, and a spindle (3) arranged in an operating direction in a movable manner. The spindle is adjusted by a hand wheel (4) in a position relative to the main body for operating the valve. A stroke limiter is provided for the spindle, and has a threaded nut (6) that is adjustable in a position with respect to the main body. The stroke limiter has a holder i.e. threaded sleeve (7), for the stopper element, where the holder is fixed at the main body and rotated with the hand wheel with respect to the main body in the operating direction.