Screen Cleaning Device Cable Swivel Mechanism
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Solution Overview
Problem
Existing screen cleaning devices for water intake screens are inefficient due to intense loading on swivel rollers, requiring lateral movement and resulting in mechanical stress and complexity during winding and unwinding of pulling cables.
Innovation Solution
A screen cleaning device with a lifting winch and actuating mechanism that allows the clearing element to pivot between clearing and open positions, using three pulling means (first, second, and third pulling means) to distribute weight and reduce interference, with the second pulling means connected to the lifting winch and actuating device via a return mechanism, facilitating uniform winding and swiveling without transverse movement or angle changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a swivel roller is used to swivel the cleaning rake, then the cleaning element can be swiveled between positions, but the swivel roller is intensely loaded by weight force and requires lateral pushing, resulting in mechanical stress and complexity
Solution Approach 1:
The patent extracts the swivel roller and its associated lateral guidance mechanism from the system. Instead of using a swivel roller that requires lateral pushing and complex guidance, the invention uses a cable arrangement where the cleaning element is suspended and swiveled purely by cable length differential, eliminating the need for lateral guidance components and reducing mechanical complexity.
Solution Approach 2:
The patent introduces cables as intermediaries between the lifting winch and the cleaning element. The cables transmit both lifting and swiveling functions without requiring direct mechanical contact or lateral guidance, allowing the cleaning element to swivel freely while being suspended, thus reducing mechanical stress and complexity.
2Productivity
If multiple pulling means are wound and unwound on a lifting winch, then the clearing element can be moved along lifting direction, but mutual interference between pulling means may occur during winding
Solution Approach 1:
The patent segments the pulling means by providing dedicated winding drums for each cable (first pulling means, second pulling means, etc.). Each drum winds and unwinds its assigned cable independently, preventing mutual interference between cables during the winding operation while maintaining coordinated movement of the clearing element.
3Ease of operation
If the second pulling means is manipulated to pivot the clearing element, then swiveling between clearing and discharge positions is achieved, but the pulling means must be manipulated through lateral movement
Solution Approach 1:
The patent replaces lateral mechanical manipulation mechanisms with a cable-based system. The second pulling means (cable) is manipulated by winding and unwinding on a dedicated drum, which translates rotational motion into the pivoting motion of the clearing element, eliminating the need for lateral movement mechanisms.
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 enables efficient and stress-reduced swiveling of the clearing element, uniform movement of the pulling means, and reduced mechanical complexity, improving the cleaning process by distributing weight forces and preventing mutual interference during winding and unwinding.
Implementation Method 1
a lifting winch, by means of which a first pulling means (4) and a second pulling means (5) can be wound and unwound, the clearing element (2) being moved along a lifting direction (7) as the pulling means are wound and unwound
Implementation Method 2
at least one actuating device (8), by means of which the second pulling means (5) can be manipulated such that the clearing element (2) is swiveled between a clearing position and an open position when the second pulling means (5) is manipulated
Implementation Method 3
Due to the weight of the clearing element, the clearing element is moved downward along the lifting direction when the pulling means are unwound
Data Source
AI summary
In one aspect, a screen cleaning device for cleaning a bar rack of a screen includes at least one clearing element for picking up and removing screenings retained by the screen. The screen cleaning device also includes a lifting winch relative to which a first pulling means and a second pulling means can be wound and unwound, wherein the clearing element is moved along a lifting direction as the pulling means are wound and unwound. Additionally, the screen cleaning device includes at least one actuating device configured to manipulate the second pulling means such that the clearing element is swiveled between a clearing position and an open position. The second pulling means is connected to the lifting winch at a first end and to the actuating device at a second end. Moreover, the second pulling means is guided via a return mechanism which is mounted on the clearing element.