Valve Manifold Spacer With Manual Shaft for Pressure Isolation
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Solution Overview
Problem
Existing electromagnetic valve manifolds face reliability issues when the spool is in the second switching position, as changes in fluid pressure can cause the fluid pressure device to malfunction, leading to potential safety hazards during maintenance.
Innovation Solution
Incorporating a spacer with a manual shaft that can be manually operated between a first switching position allowing connection between the output passage and output port, and a second switching position blocking this connection, ensuring the fluid pressure remains stable and preventing accidental operation during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spool is switched to the second switching position to maintain fluid pressure during maintenance, then the fluid pressure device is stopped and maintenance can be performed safely, but the path from the output port to the fluid pressure device remains open which allows pressure changes to propagate and cause malfunction
Solution Approach 1:
The invention divides the valve system into two independent segments: the electromagnetic valve with spool for supply/discharge control, and the stopper valve with manual shaft for output port control. This segmentation allows each valve to independently control specific fluid paths, enabling the output port to be isolated from the fluid pressure device even when the spool is in the second switching position, thereby preventing pressure changes from propagating while maintaining a relatively simple overall structure.
2Reliability
If the manual shaft blocks the connection between the output passage and output port to prevent pressure changes, then the fluid pressure device is protected from malfunction, but the device structure becomes more complex with additional switching mechanisms
Solution Approach 1:
The stopper valve with manual shaft acts as an intermediary component between the output passage and the output port. This intermediary mechanism provides a dedicated control path that can independently block or allow fluid flow to the output port, protecting the fluid pressure device from pressure changes without requiring complex modifications to the existing electromagnetic valve structure.
3Adaptability or versatility
If the spool allows connection between output port and output passage in the second switching position, then the fluid pressure device can be activated when needed, but this same connection path allows pressure changes to cause accidental operation during maintenance
Solution Approach 1:
The manual shaft of the stopper valve provides preliminary control over the output port connection before the electromagnetic valve operates. By manually switching the stopper valve to block the output port connection beforehand, the system prevents pressure changes from causing accidental operation during maintenance, while still allowing quick activation when needed by simply switching the manual shaft back to the open position.
Data Source
AI summary
An electromagnetic valve manifold includes an electromagnetic valve including an output port, a manifold base including an output passage, and a spacer arranged between the manifold base and the electromagnetic valve. The spacer includes a spacer block including a shaft hole and a manual shaft accommodated in the shaft hole. The spacer block includes an output connecting passage that is connected to the shaft hole and connects the output passage and the output port to each other. The manual shaft is configured to be manually operated to be switched between a first switching position, in which the manual shaft allows for connection between the output passage and the output port through the output connecting passage, and a second switching position, in which the manual shaft blocks the connection between the output passage and the output port through the output connecting passage.