Changeover Valve Positioning Pin and Bore System
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Solution Overview
Problem
Existing change-over valves require removal and reinstallation of the wall connection housing to adjust the spindle position for fluid stream allocation, leading to incorrect installations and changes in plans.
Innovation Solution
Incorporating multiple position bores in the valve seat and a positioning pin system that allows for adjustable spindle settings without removing the wall connection housing, enabling flexible allocation of fluid streams to different outlets by rotating the valve top within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wall connection housing is removed and reinstalled to adjust spindle position, then the fluid stream allocation can be changed, but the installation process becomes complex and time-consuming
Solution Approach 1:
The valve top is segmented from the wall connection housing, allowing the valve top to be independently positioned and rotated. The positioning pin on the valve top engages with multiple position bores in the valve seat, enabling discrete angular positions to be selected without removing the housing. This segmentation allows flexible fluid stream allocation while maintaining a simple installation process.
Solution Approach 2:
The valve top is made dynamically adjustable through rotational movement around the spindle axis. The positioning pin can engage different position bores at various angular positions, allowing the fluid stream allocation to be changed dynamically by rotating the valve top to different orientations, rather than requiring static reinstallation of the entire housing.
2Reliability
If the wall connection housing is removed to correct incorrect spindle position allocation, then the correct allocation can be achieved, but installation time is lost and productivity decreases
Solution Approach 1:
Multiple position bores are pre-positioned in the valve seat at different angular locations during manufacturing. The positioning pin on the valve top is designed to engage with these pre-positioned bores, allowing the installer to select the correct angular position directly during initial installation without needing to remove and reinstall the housing later to correct allocation errors.
Solution Approach 2:
The positioning pin and position bore system enables self-adjustment of the spindle position allocation. The installer can independently rotate the valve top and engage the positioning pin with different position bores to achieve the correct fluid stream allocation without requiring removal of the wall connection housing or assistance from other installers.
3Adaptability or versatility
If multiple position bores are provided in the valve seat, then the valve top can be positioned at different angular locations for flexible fluid allocation, but the device complexity increases
Solution Approach 1:
The position bores are strategically distributed at specific angular locations in the valve seat corresponding to the required fluid stream allocations. Rather than providing continuous adjustment capability, discrete position bores are placed only where needed for standard allocation patterns (e.g., 0°, 120°, 240° for three-way valves). This localized approach provides necessary versatility while keeping the valve seat structure relatively simple.
Solution Approach 2:
The positioning pin and position bore system uses asymmetric angular positioning to achieve different fluid stream allocations. The position bores are arranged at specific asymmetric angles relative to each other, allowing the valve top to be oriented in discrete angular positions that correspond to different outlet connections. This asymmetric arrangement provides versatile allocation capability without requiring symmetric complexity.
Data Source
AI summary
A changeover valve includes a wall connection housing with at least one inlet channel and at least three outlet channels opening into a valve seat for receiving a valve upper part. The valve upper part has a base piece with at least three outlet openings connectable to a respective outlet channel via the valve seat. The valve upper part has at least one feed connected to the at least one inlet channel and connectable to at least one outlet opening via a control disc rotatable relative to a stationary inlet disc. The control disc engages with a spindle for rotating the control disc. The base piece has at least one positioning pin engaging into a positioning bore arranged in the valve seat. The valve seat has at least two positioning bores for engaging with the at least one positioning pin in different assembly positions of the valve upper part.