Rotating Shielding Plate Valve for High-Speed Paper Pickup
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Solution Overview
Problem
Conventional solenoid valves used in paper sheet pickup apparatuses have a low response rate, making it difficult to efficiently circulate and interrupt fluid flow, which limits the pickup rate of paper sheets, especially large and heavy ones, due to high inertia and slow pressure regulation.
Innovation Solution
A valve device with movable shielding plates that cooperate to instantly open and close fluid passages, allowing for rapid circulation and blocking of a large amount of fluid, enhancing the response rate and enabling the pickup of heavy paper sheets at a high rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the diameter of pipes connected to solenoid valve is increased to increase air flow, then the flow rate is improved, but the inertia of plunger increases and response rate deteriorates
Solution Approach 1:
The valve device divides the fluid passage control into multiple independent shielding plates (first shielding plate and second shielding plate) that can move separately. Each shielding plate has its own fluid passing hole and can be positioned independently to control different aspects of fluid flow, allowing for optimized flow paths without increasing plunger inertia
Solution Approach 2:
The invention transitions from axial linear motion of a single plunger to two-dimensional rotational movement of shielding plates. The shielding plates rotate to align their fluid passing holes with the fluid passage, creating a new dimensional approach to valve operation that reduces inertial effects while maintaining flow control capability
2Productivity
If solenoid valve is used to control fluid circulation, then the pickup rate is improved, but the response rate of valve operation is low due to slow pressure regulation
Solution Approach 1:
The invention replaces the solenoid valve's electromagnetic-plunger mechanism with a rotational shielding plate system. This substitution eliminates the slow pressure-dependent plunger movement and replaces it with a mechanical rotation system that can quickly align or block fluid passages through simple rotational motion of lightweight shielding plates
Solution Approach 2:
The shielding plates are designed to rotate dynamically between open and closed positions, allowing rapid transition of the fluid passage from open to closed state. The rotational movement enables quick repositioning without the inertial constraints of linear plunger movement, achieving high response rates for controlling paper sheet pickup timing
3Device complexity
If conventional solenoid valve structure is used, then the device complexity is low, but the response rate and fluid circulation efficiency are poor
Solution Approach 1:
The first and second shielding plates are combined in a cooperative arrangement where both plates work together to control the fluid passage. Their fluid passing holes align to create an open passage or rotate away to block it, merging their functions to achieve efficient fluid control with a unified valve structure that maintains simplicity while improving performance
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 valve device achieves a high response rate and efficient fluid circulation, allowing for the rapid pickup of paper sheets, including heavy ones, by quickly opening and closing fluid passages, thereby improving the overall pickup efficiency.
Implementation Method 1
a negative-pressure generating unit configured to draw air through the suction hole from a reverse side of the pickup member, thereby generating negative pressure on a surface of the pickup member to attach thereon the one paper sheet
Implementation Method 2
a suction unit connected to the negative-pressure generating unit via a fluid passage
Data Source
AI summary
A valve device is provided with a first block connected to an upstream-side suction tube that is connected to a negative-pressure chamber, a second block connected to a downstream-side suction tube that is connected to a pump, first and second shielding plates rotatably interposed between the first and second blocks, and servo motors for rotating the shielding plates. Each of the shielding plates has a plurality of air passing holes, and are rotated in opposite directions.