Rotary Bar Screen Device With Vertical Inversion And Active Removal
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Solution Overview
Problem
Conventional rotary bar screen devices have a limited effective area for seawater passage and require excessive space for installation, making them inefficient and difficult to maintain, as they often break foreign materials due to self-weight and necessitate additional brackets for seawater introduction.
Innovation Solution
The rotary bar screen device features a support frame with driving and driven sprockets, transfer chains, screen buckets with bent upper and lower plates for increased seawater passage, a removal unit with fin blocks to push out foreign materials, and a slide plate for guiding materials into a collection tub, optimizing the effective area and reducing installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screen bucket is installed with bar blocks using fixing bolts between upper and lower bars, then foreign materials can be filtered, but the effective height of the through-hole for seawater introduction is reduced to only 61% of the total height
Solution Approach 1:
The screen bucket is divided into an upper bar and a lower bar that are separated by a predetermined distance, creating a through-hole space between them. This segmentation allows seawater to flow through the entire height of the screen bucket, maximizing the effective passage area while still enabling foreign material filtration through the bar blocks installed within this space.
Solution Approach 2:
The invention transitions from a horizontal installation approach to a vertical arrangement where the upper and lower bars are positioned at different heights. This dimensional change creates vertical through-holes that allow seawater to pass through the full height of the screen bucket, significantly increasing the effective passage area compared to horizontal configurations.
2Ease of operation
If the rotary bar screen device is incliningly installed to allow foreign materials to drop smoothly by self-weight, then foreign materials can be removed, but the device excessively occupies installation space and becomes difficult to maintain
Solution Approach 1:
Instead of inclining the screen bucket to use gravity for foreign material removal, the invention inverts the approach by making the screen bucket vertical and using a removal unit that actively pushes foreign materials out. This inversion eliminates the need for excessive installation space while maintaining effective foreign material removal capability.
Solution Approach 2:
A removal unit is introduced as an intermediary mechanism between the screen bucket and the foreign materials. This removal unit, which includes pushing members that rotate with the driving sprocket, actively pushes foreign materials out of the screen bucket, replacing the passive gravity-based removal method and enabling compact vertical installation.
3Strength
If a separate bracket is used to install and fix the bar block between upper and lower bars, then the bar block can be securely fixed, but the structure becomes more complex and the seawater introduction passage is insufficient
Solution Approach 1:
The invention merges the bar block with the lower bar by directly installing the bar block on the lower bar, eliminating the need for a separate bracket. This integration simplifies the overall structure while maintaining secure fixation of the bar block, and simultaneously increases the seawater introduction passage by removing the bracket that would otherwise obstruct the flow path.
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
This design enhances seawater intake efficiency by increasing the effective area for seawater passage to 80% or more, simplifies foreign material removal, reduces installation space, and facilitates maintenance by allowing vertical installation and improved filter performance.
Implementation Method 1
the screen bucket 50 installed at the transfer chain 40 picks up various foreign materials from the water
Implementation Method 2
the driving motor 200, and transmits a driving force. The up/down pair of driving and driven sprockets are provided at both left and right sides of the support frame, and are driven by the driving force received from the driving motor
Implementation Method 3
The removal unit is provided between the left and right driving sprockets, and rotates with the driving sprocket at the same time and pushes the foreign materials out of the screen bucket
Implementation Method 4
the foreign materials fall down and are collected by the collection tub 80 as the screen bucket 50 turns over passing a top point of the driving sprocket 30
Data Source
AI summary
Provided is a rotary bar screen device. The device includes a driving motor, an up/down pair of driving and driven sprockets, left and right transfer chains, a plurality of screen buckets, a removal unit, and a slide plate. The driving motor is provided over a support frame, and transmits a driving force. The driving and driven sprockets are driven by the driving force. The left and right transfer chains connect the driving and driven sprockets with each other while circulatively moving. The plurality of screen buckets are provided between the left and right transfer chains. The removal unit is provided between the left and right driving sprockets. The slide plate guides the foreign materials dropping from the screen buckets.