Inactive Gas Introducing Facility for Storage Rack Safety
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Solution Overview
Problem
Existing inactive gas introducing facilities for storage racks face challenges in maintaining continuous gas supply during inspection or maintenance work without disrupting the gas supply state, and there is a risk of unintended changes in gas feed state, which can lead to increased gas discharge into the storage space.
Innovation Solution
An inactive gas introducing facility with a controller that manages gas supply based on a predetermined pattern, including an inspection door open-and-close detector and a manually-operated stop nullifying command portion, ensures continuous gas supply during inspections by stopping and resuming gas flow according to the previous pattern and prohibits manual changes to the supply parameters, even when the inspection door is open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inspection door is opened to perform inspection or maintenance work, then workers can access the storage space, but the gas supply state may be disrupted and gas discharge into the storage space may increase
Solution Approach 1:
The system dynamically adjusts gas supply control based on the inspection door state. When the door is opened, the controller can switch between stop mode (stopping gas supply) and stop invalid mode (maintaining gas supply), allowing flexible adaptation to different inspection scenarios while maintaining gas supply stability when needed
Solution Approach 2:
The inspection door open-and-close detector provides real-time feedback to the controller about the door state. This feedback mechanism enables the controller to automatically adjust gas supply control accordingly, preventing unintended changes in gas feed state while allowing inspection work
2Object-affected harmful factors
If the gas supply is stopped when the inspection door is opened, then gas discharge into the storage space is reduced, but inspection work cannot be performed while gas is being supplied
Solution Approach 1:
The system provides dynamic control modes that can be switched based on inspection requirements. The stop invalid mode allows gas supply to continue during inspection when needed, while the stop mode reduces gas discharge when inspection doesn't require active gas supply, achieving adaptability to different inspection scenarios
3Adaptability or versatility
If manual changes to supply parameters are allowed during inspection, then gas supply can be adjusted, but unintended changes may occur disrupting the inspection
Solution Approach 1:
The controller prohibits manual changes to supply parameters when the inspection door is opened, preventing unintended disruptions to the inspection process. This preliminary restriction ensures inspection accuracy while still allowing gas supply adjustment through automated control modes (stop mode and stop invalid mode) that are appropriately selected before inspection begins
Data Source
AI summary
An inactive gas introducing facility for a storage rack is provided in which supply of inactive gas to a container is stopped if an open state of an inspection door is detected while in a normal stop state in which a stop nullifying command is not issued and in which the supply of the inactive gas based on the immediately preceding supply pattern is continued and any changes, through manual operation, to a parameter that defines the immediately preceding supply pattern are prohibited, if an open state of an inspection door is detected while in a stop nullifying state in which the stop nullifying command is issued.