Stack Valve Merging Switching and Dividing Sections
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Solution Overview
Problem
Conventional stack valves with a bucket parallel movement function become large in size when additional functions are added, such as descending and ascending sequence valves and a float electromagnetic valve, due to the placement of switching valves in proximity to dividing valves.
Innovation Solution
The ascending and descending cancellation switching valves are integrated within the same dividing section, allowing for the elimination of redundant sections and simplification of paths, and are designed with cup-shaped plugs to share a spool hole manufacturing step, reducing the overall size and complexity of the stack valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If switching valves are placed adjacent to dividing valves in conventional stack valve design, then the valve structure is simplified, but the valve size becomes large when additional functions are added
Solution Approach 1:
The patent merges the switching valve and dividing valve into a single integrated valve unit. The switching valve is positioned within the same valve body as the dividing valve, allowing both functions to be performed by a single compact component rather than requiring separate adjacent valves, thereby reducing overall valve size while maintaining structural simplicity
Solution Approach 2:
The integrated valve unit performs multiple functions simultaneously - it acts as both a switching valve for controlling fluid flow direction and a dividing valve for distributing fluid to multiple outlets. This multi-functionality eliminates the need for separate dedicated switching and dividing valve sections, reducing the overall valve size when additional functions are added
2Adaptability or versatility
If multiple functions are added to conventional stack valve, then the functionality is enhanced, but the valve size becomes large
Solution Approach 1:
Multiple valve functions (switching, dividing, and additional control functions) are merged into a single integrated valve body. The switching valve is incorporated within the dividing valve structure, allowing enhanced functionality without proportionally increasing valve size, as all functions share the same compact valve section rather than requiring separate dedicated sections
Data Source
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AI summary
A stack valve 1 includes an ascending dividing valve 14 which is provide on an ascending junction path 23 and controls the flow rate of a pressure fluid supplied to a head-side chamber 4a of a bucket cylinder 4, an ascending branched path 24 which is branched from the ascending junction path 23 and connected to an unloading path 21, and an ascending cancellation switching valve 19 which is provided on the ascending branched path 24 to close or open the ascending branched path 24. The ascending dividing valve 14 and the ascending cancellation switching valve 19 are provided in the same dividing section 83.