Valve Block Layout for Neutral Cut Valves in Dual Pressure Circuits
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Solution Overview
Problem
The addition of a neutral cut valve in a fluid pressure control device increases the size of the valve block due to the need for additional space to accommodate it.
Innovation Solution
The fluid pressure control device is designed with a first and second circuit system, each with its own neutral passage and neutral cut valve, where the neutral cut valves are accommodated in separate regions of a shared valve block, preventing the need for additional space and maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a neutral cut valve is added to the first circuit system in a valve block, then the functionality and control precision are improved, but the size of the valve block increases
Solution Approach 1:
The patent combines the first neutral cut valve and second neutral cut valve into a single integrated valve assembly within the valve block. This merging approach allows both valves to share common structural elements and mounting space, thereby improving control precision for both circuit systems without proportionally increasing the overall valve block size
Solution Approach 2:
The valve block is designed with universal mounting structures and common hydraulic passages that can accommodate multiple neutral cut valves. This multi-functional design enables the same structural framework to serve both circuit systems, adding the required control precision while minimizing the increase in valve block dimensions
Data Source
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AI summary
A fluid pressure control device (100) includes a first circuit system (10), a second circuit system (20), and a valve block (3) that has a first region (R1) in which first control valves (121) to (125) are accommodated and a second region (R2) in which second control valves (221) to (224) are accommodated. The first circuit system (10) includes a first neutral cut valve (40) that allows or shuts off the communication between a first neutral passage (11) and a tank (T). The second circuit system (20) includes a second neutral cut valve (60) that allows or shuts off the communication between the second neutral passage (21) and the tank (T). The first neutral cut valve (40) and the second neutral cut valve (60) are accommodated in either the first region (R1) or the second region (R2).