Detachable Seal Valve Unit for High-Pressure Vacuum Ejectors
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Solution Overview
Problem
Conventional vacuum ejectors face challenges in reliably releasing workpieces stuck to suction pads or removing dust and foreign materials, particularly when high-pressure break air is required, and there is a need for a simple configuration that can be adapted based on usage.
Innovation Solution
A vacuum ejector design that includes a seal valve mechanism in the negative pressure flow path, which is triggered by supply air to prevent break air from flowing into the vacuum generation mechanism, allowing for reliable sealing even with high-pressure break air, and an optional detachable seal valve unit for varying applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal valve is added to prevent break air from flowing into the vacuum generation mechanism, then the reliability of high-pressure break air usage is improved, but the device complexity increases
Solution Approach 1:
The seal valve unit is designed as a detachable component that can be separated from the main vacuum ejector body. This allows the seal valve functionality to be extracted and only attached when high-pressure break air capability is needed, thereby improving reliability without permanently increasing device complexity
Solution Approach 2:
The seal valve mechanism uses a dynamically actuated design where the valve opens automatically when break air is supplied and closes when break air supply stops. This dynamic operation ensures reliable sealing only when necessary, maintaining simplicity during normal operation while providing protection when needed
2Reliability
If the seal valve unit is permanently attached to the vacuum ejector, then the reliability is improved for all operations, but the ease of manufacture and adaptability decrease
Solution Approach 1:
The vacuum ejector system is segmented into a main body and a detachable seal valve unit. This segmentation allows different configurations to be assembled based on specific application requirements - the seal valve unit can be attached when high-pressure break air capability is needed and removed when it is not required
Solution Approach 2:
The seal valve unit is designed with universal mounting features that allow it to be attached to various vacuum ejector models. The unit serves multiple functions including sealing the negative pressure flow path, enabling high-pressure break air capability, and protecting the vacuum generation mechanism from break air contamination
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures reliable sealing of the negative pressure flow path, allowing for high-pressure break air usage when needed, while simplifying the apparatus configuration by enabling the attachment or removal of the seal valve unit based on intended use, thus optimizing performance across different scenarios.
Implementation Method 1
generates negative pressure by causing compressed air to flow through a diffuser (also referred to as an ejector portion or vacuum generation mechanism)
Implementation Method 2
the seal valve mechanism is configured to enter an open state due to supply of the supply air from the supply valve, and enter a closed state when the supply of the supply air from the supply valve stops
Data Source
Figure 1
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AI summary
A vacuum ejector (10B) comprises a main body (12) and a seal valve unit (20B) including a seal valve mechanism (70) arranged in a negative pressure flow path (62) between a vacuum generation mechanism (50) and a break flow path (48), and configured to prevent the break air that passes through the break flow path (48) to be supplied to a vacuum port (38) from flowing out to the vacuum generation mechanism (50). The seal valve unit (20B) is configured to be attached in a freely detachable manner to the main body (12) of the vacuum ejector (10B).