Slit Valve Door Connector to Prevent Rotation and Sealing Failure
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Solution Overview
Problem
Existing slit valve apparatuses experience issues with the door plate rotating improperly, leading to potential sealing failures, and generate noise and vibrations due to shocks during operation.
Innovation Solution
The slit valve apparatus incorporates a connector with a first wedge portion on the door plate and a second wedge portion on the valve rod, preventing the door plate from rotating, and includes a driving unit with a cylinder and piston system that reduces shock, noise, and vibrations through controlled pneumatic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a door plate contacts a housing during operation, then the door plate can be driven to open and close the valve, but the door plate may rotate improperly causing sealing member twisting or release
Solution Approach 1:
A connector is introduced as an intermediary component between the door plate and the drive mechanism. The connector includes a body portion connected to the door plate and an extension portion that interfaces with the valve rod, preventing relative rotation while transmitting the driving force for opening and closing operations.
Solution Approach 2:
The connector employs asymmetric wedge portions (first wedge portion on the extension portion and second wedge portion on the valve rod) that fit together in a non-symmetric manner. This asymmetric geometry prevents rotational movement while allowing linear motion, ensuring the door plate moves only in the intended opening/closing direction without rotating.
2Productivity
If a door plate is driven by a driving unit, then the valve can be opened and closed, but shocks, noise and vibrations occur during operation
Solution Approach 1:
The connector body portion includes a cushioning portion that makes contact with the door plate before the main driving force is applied. This cushioning element absorbs initial shocks and dampens vibrations during the opening and closing operations, reducing noise and harmful vibrations while maintaining operational speed.
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 effectively prevents the door plate from rotating, alleviates operational shocks, and reduces noise and vibrations, enhancing the operational reliability and quietness of the slit valve apparatus.
Implementation Method 1
the extension portion includes a first wedge portion configured to prevent the door plate from rotating, and the valve rod includes a second wedge portion corresponding to the first wedge portion
Implementation Method 2
a piston driven up and down in the internal space of the cylinder, wherein the cylinder includes an inlet through which air flows, an outlet spaced apart from the inlet, and a piston movement recess disposed between the inlet and the outlet
Data Source
AI summary
A slit valve apparatus includes a door plate opening and closing an opening of a valve housing, a valve rod connected to the door plate, a guide housing disposed at a lower end of the door plate and disposed so that the valve rod passes therethrough, an L-motion block disposed in an internal space of the guide housing and connected to the valve rod, a cam block connected to the L-motion block and disposed in the internal space of the guide housing, a driving rod connected to a lower end of the valve rod, and a driving unit connected to the driving rod to drive the driving rod, wherein the slit valve apparatus further comprises a connector installed in the door plate and connected to the valve rod, wherein the connector includes a body inserted into and disposed in the door plate and an extension portion extending from a lower end of the body, the extension portion includes a first wedge portion preventing the door plate from rotating, and the valve rod includes a second wedge portion corresponding to the first wedge portion.