Curved Screen Attachment Device for Banana Screen Wear Reduction

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Solution Overview

Problem

Existing screen attachment devices for screening apparatuses, particularly 'banana screens' with frame angles less than 180°, experience intense wear around inclination changes, leading to frequent replacement of screen elements.

Innovation Solution

An attachment device with a frame attachment portion divided into two sections forming a frame angle of less than 180° and a curved screen attachment portion that splits the angle into two or more screen angles, transforming the frame angle into a circular arc shape to reduce localized wear, using spreading pins for secure attachment and profiled strips for easy mounting of screen elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a frame with angle less than 180° is used to form banana-shaped screen deck, then the screening apparatus can handle specific material flow requirements, but intense localized wear occurs around the angle transition point

Engineering Contradiction:

Improvescreening capability for specific material flowVSAvoidscreen element lifespan

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The attachment device is divided into multiple attachment sections (first frame attachment section, second frame attachment section, and intermediate screen attachment sections) that distribute the mechanical stress across different locations, preventing concentration of wear at a single angle transition point

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The screen attachment portion is designed with a curved configuration that transforms the sharp frame angle into a gradual arc, distributing the material flow and mechanical stress more evenly across the screen elements, thereby reducing localized wear intensity

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Adaptability or versatility

If intermediate deformable frame structure is used for screen attachment, then screen elements can be attached to frames from different manufacturers, but the structure adds complexity to the attachment device

Engineering Contradiction:

Improvecompatibility with different frame manufacturersVSAvoidattachment device structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The attachment device incorporates both frame attachment portions and screen attachment portions in a single integrated component, enabling it to attach screen elements to frames from different manufacturers while maintaining a relatively simple structure without requiring multiple separate components

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2444167B1Adapter for screen elements

Publication Date: 2013.03.20 METABO MINERALS SWEDEN

Figure 1~3
Figure 4~6

AI summary

An attachment device for attaching screen elements to a frame (2) of a screening apparatus comprises a frame attachment portion (3) for attachment to the screen frame (2) and a screen attachment portion (6) for attachment of the screen elements. The frame attachment portion (3) comprises a first frame attachment section (4) and a second frame attachment section (5), each frame attachment section (4, 5) being arranged to be attached to a first frame section (2a) and a second frame section (2b), respectively. The frame sections (2a, 2b) form between them a frame angle (α) of less than 180°. The screen attachment portion (6) is curved such that screen elements attached to the screen attachment portion form a screen surface on which the frame angle (α) corresponds to two or more screen angles (β1, β2) of less than 180° and larger than the frame angle (α). Alternatively, the screen surface may have a circular arc shape. A screening apparatus is also disclosed.