Servo Valve Flow Setting With Rotary Push-Push Actuation
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Solution Overview
Problem
Conventional valves with push-push mechanisms for flow rate regulation in sanitary fittings are cumbersome to use and prone to wear due to the need for multiple actuations and the use of multiple manual control elements, which increases the risk of mechanical wear over time.
Innovation Solution
A valve design featuring two rotatable setting discs with inclined surfaces that convert rotary movement into axial movement to actuate the push-push mechanism, allowing for user-friendly flow rate regulation with reduced wear, and a detachable setting attachment that can be retrofitted to existing valves for dual functionality in actuating the push-push mechanism and regulating flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a push-push mechanism with three switching stages is used for flow rate regulation, then graduated flow regulation is possible, but the handling becomes cumbersome and requires multiple actuations
Solution Approach 1:
The patent introduces a rotary dimension to the linear push-push mechanism. By converting the axial movement into rotational movement through inclined setting surfaces, the valve allows continuous flow rate adjustment through a single rotary action, eliminating the need for multiple discrete actuations required by conventional three-stage push-push mechanisms.
2Adaptability or versatility
If multiple manual control elements are used for actuating the push-push mechanism and setting flow rate, then both functions can be performed, but the risk of mechanical wear increases
Solution Approach 1:
The patent merges the actuation function and flow rate setting function into a single manual control element. The control element performs both pushing the pilot valve and setting the flow rate through rotary movement, eliminating the need for multiple separate control elements and thereby reducing mechanical wear points.
Solution Approach 2:
The patent replaces the traditional mechanical stop points and latching mechanisms with inclined setting surfaces that convert rotary movement into axial force. This substitution eliminates point contact wear and provides a more reliable, wear-resistant mechanism for actuating the push-push system.
3Ease of operation
If stop points are positioned at certain points on stop lines with a latching mechanism, then the push-push mechanism can be limited to certain positions, but wear increases due to repeated engagement at the same points
Solution Approach 1:
The patent replaces the linear stop-point-and-stop-line arrangement with inclined setting surfaces that engage over an area rather than at a point. The rotary movement creates continuous contact along the inclined surface, distributing wear across a larger area and eliminating the concentrated wear at discrete stop points.
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 valve design provides intuitive and user-friendly flow rate regulation with reduced wear, allowing for easy adjustment of the open position and actuation of the push-push mechanism, while the detachable setting attachment simplifies retrofitting and reduces the complexity of handling and maintenance.
Implementation Method 1
two setting discs (8, 9) arranged to be rotatable relative to one another for setting the open position... The setting discs can lie flat against one another over large parts of their setting range and transmit the required setting forces
Data Source
AI summary
A servo valve, with a valve housing, a main valve and a pilot valve which can be actuated via a push-push mechanism for adjusting the main valve between an open position and a closed position. Two setting discs are provided which are arranged to rotate relative to each other for setting the open position.