Electron Beam Irradiation Device Inert Gas Flow Control
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Solution Overview
Problem
Existing electron beam irradiation devices consume excessive inert gas due to continuous flow rates, even when the oxygen concentration in the irradiation chamber is low, leading to wasteful consumption and inefficiency, especially when the irradiated object is stopped or moving at slower speeds.
Innovation Solution
An electron beam irradiation device equipped with an oxygen concentration detection system and a flow regulating valve, which adjusts the inert gas flow rate based on detected oxygen levels, reducing consumption while maintaining optimal oxygen concentration by controlling the valve travel of the flow regulating valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inert gas is continuously supplied at a constant flow rate, then oxygen concentration in the irradiation chamber is maintained at a low level, but the quantity of inert gas consumed increases greatly
Solution Approach 1:
The patent applies dynamics by making the inert gas flow rate adjustable rather than fixed. The flow regulating valve is controlled to vary the flow rate based on operational conditions (object movement state and oxygen concentration), transforming a static system into a dynamic one that adapts to changing requirements, thereby reducing waste while maintaining control.
Solution Approach 2:
The patent implements feedback control by using the oxygen concentration detection device to monitor the irradiation chamber environment and feed this information back to the valve travel control device, which adjusts the flow regulating valve accordingly. This closed-loop feedback mechanism ensures oxygen concentration is maintained at appropriate levels while optimizing inert gas consumption.
2Reliability
If inert gas is continuously introduced at high flow rate to remove accompanying air, then oxygen concentration is controlled, but inert gas is consumed vainly when object is stopped or moving slowly
Solution Approach 1:
The system dynamically adjusts the inert gas flow rate based on the irradiated object's movement state. When the object is stopped or moving slowly, the flow rate is reduced since less air is being carried into the chamber. This dynamic adaptation improves productivity by eliminating vain consumption while maintaining reliable oxygen concentration control.
Solution Approach 2:
The patent changes the flow rate parameter of inert gas based on operational conditions. By monitoring object speed and movement state, the system adjusts the gas flow parameter to match actual requirements, reducing waste during low-speed or stationary operations while maintaining adequate flow during high-speed operations when air carry-in is significant.
Data Source
AI summary
To provide an electron beam irradiation device capable of reducing quantity of inert gas consumed while maintaining oxygen concentration in an irradiation chamber in appropriate level. An electron beam irradiation device to irradiate an electron beam to an irradiated object passing through an irradiation chamber while introducing inert gas into the irradiation chamber comprising an oxygen concentration detection device to detect oxygen concentration in the irradiation chamber; a main controlling valve to regulate flow rate of inert gas introduced in the irradiation chamber; a control unit to control valve travel of the main controlling valve so that the flow rate of the inert gas decreases when the oxygen concentration becomes low on the basis of the oxygen concentration detected by the oxygen concentration detection device.