Vacuum Suction Apparatus Switching Valve Fluid Consumption
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Solution Overview
Problem
Conventional vacuum suction apparatuses continuously consume a fixed amount of pressure fluid even after a workpiece has been attracted, leading to unnecessary fluid consumption and energy usage.
Innovation Solution
A vacuum suction apparatus with a switching valve mechanism that interrupts the supply of pressure fluid once a workpiece is attracted, using a spring-actuated valve to maintain constant negative pressure and reduce fluid consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure fluid is continuously supplied to the ejector to maintain negative pressure, then the workpiece can be reliably held under suction, but excessive pressure fluid is consumed needlessly
Solution Approach 1:
The patent implements periodic action by using a switching valve to intermittently supply pressure fluid to the ejector only when needed for workpiece attraction, rather than continuous supply. The valve switches between connected and disconnected states based on whether suction is required, eliminating wasteful fluid consumption during non-working periods while maintaining reliable holding when active.
Solution Approach 2:
The switching valve is designed to automatically detect and respond to the suction state, switching its position based on whether negative pressure is required. This self-service mechanism eliminates the need for external control systems, continuously monitoring the suction pad state and autonomously controlling pressure fluid supply to match actual operational needs.
2Loss of substance
If a switching mechanism is added to control pressure fluid supply, then pressure fluid consumption is reduced, but the device structure becomes more complex
Solution Approach 1:
The switching valve automatically detects the suction state and controls pressure fluid supply without external intervention. The valve body itself serves as the control element, using the presence or absence of negative pressure to automatically switch between connected and disconnected states, eliminating the need for additional sensors, actuators, or control circuits.
Solution Approach 2:
The patent uses pneumatic principles to design the switching valve, where the valve body is actuated by pressure differential created by the suction state itself. The valve leverages the existing negative pressure environment to control its own operation, using pneumatic force to switch positions rather than requiring separate mechanical or electrical actuation systems.
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 apparatus significantly reduces pressure fluid consumption and energy efficiency by halting fluid supply after attraction, maintaining constant pressure and preventing wasteful fluid use during workpiece holding.
Implementation Method 1
an ejector that generates a negative pressure from a supplied pressure fluid
Implementation Method 2
a workpiece is attracted under suction by the suction mechanism by the negative pressure generated by the ejector
Implementation Method 3
maintaining constant pressure and preventing wasteful fluid use during workpiece holding
Data Source
AI summary
A switching valve is disposed between a pressure fluid supply source and an ejector in a vacuum suction apparatus. A supply port of the switching valve is connected to the pressure fluid supply source, and an outlet port of the switching valve is connected to the ejector. In addition, when suction pads attract a workpiece under suction and a negative pressure becomes constant, a valve body is displaced by a negative pressure supplied through a vacuum port to the switching valve, whereupon communication between the supply port and the outlet port is blocked.