Conveyor Belt Junction Device Differential Plate Extensibility

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Solution Overview

Problem

Conveyor belt junctions experience distortion and premature wear due to uneven extensibility and compressibility of upper and lower plate reinforcements when passing over rollers, leading to reduced service life and increased repair costs in industrial installations.

Innovation Solution

The junction device features a highly extensible upper plate reinforcement and an inextensible or almost inextensible lower plate reinforcement, with a central connecting part that differs in properties, allowing for differential extension and ensuring the inextensible reinforcement transmits forces without failure, while being adaptable to various conveyor belt thicknesses through a diagonal, integral design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If identical extensibility properties are provided for reinforcements of upper and lower plates, then the distortion during roller passage is reduced, but the service life is still limited due to excessive extension of the upper plate reinforcement

Engineering Contradiction:
Improvedistortion uniformityVSAvoidservice life
Core Design Contradiction:
Stability of the object's compositionVSDuration of action of moving object

Solution Approach 1:

The patent applies different extensibility properties to the reinforcements of the upper and lower plates specifically. The upper plate reinforcement is made highly extensible (extensibility index ≥ 1.5) to accommodate the extension that occurs during roller passage, while the lower plate reinforcement is made inextensible or quasi-inextensible (extensibility index ≤ 0.5) to maintain stability. This local differentiation of material properties resolves the contradiction by allowing each plate to respond appropriately to the specific stresses it experiences.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent changes the key parameter of extensibility for the reinforcements based on their location. By selecting materials with different extensibility indices for the upper and lower plate reinforcements, the system adapts to the varying mechanical conditions during operation. The highly extensible upper reinforcement accommodates dynamic deformation while the inextensible lower reinforcement provides structural stability, thereby extending service life.

Inventive Principle:
Principle #35Parameter changes

2Stability of the object's composition

If the upper plate reinforcement is made highly extensible to accommodate roller passage, then the distortion is absorbed, but the tensile force transmission is insufficient without a corresponding inextensible component

Engineering Contradiction:
Improveextension accommodationVSAvoidtensile force transmission
Core Design Contradiction:
Stability of the object's compositionVSForce

Solution Approach 1:

The patent assigns different functional qualities to the reinforcements based on their location and role. The upper plate reinforcement is designed with high extensibility to absorb and accommodate the extension that occurs when the conveyor belt passes over rollers. The lower plate reinforcement is designed with inextensible or quasi-inextensible properties to provide stable tensile force transmission. This localized functional differentiation ensures both extension accommodation and effective force transmission.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The junction device uses composite reinforcement structures with different material properties in the upper and lower plates. The highly extensible material in the upper plate (such as elastomeric or flexible synthetic materials) works in conjunction with the inextensible material in the lower plate (such as rigid fabrics or metal mesh) to create a synergistic system that simultaneously accommodates deformation and transmits force effectively.

Inventive Principle:
Principle #40Composite materials

3Reliability

If the junction device is designed with fixed geometry for specific belt thickness, then the reinforcement properties are optimized, but the adaptability to different belt thicknesses is lost

Engineering Contradiction:
Improvereinforcement performanceVSAvoidbelt thickness compatibility
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent designs the junction device with universal adaptability to accommodate conveyor belts of different thicknesses while maintaining optimal reinforcement performance. The upper and lower plates are configured with sufficient clearance and flexible connection mechanisms that allow the device to adapt to various belt thicknesses. The differential extensibility properties of the reinforcements ensure reliable performance across different applications, making the junction device universally applicable.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The junction device incorporates dynamic characteristics through the highly extensible upper plate reinforcement that can accommodate varying degrees of deformation depending on the belt thickness and operating conditions. The flexible nature of the extensible reinforcement allows the device to dynamically adapt to different geometric configurations while the inextensible lower reinforcement maintains structural integrity, enabling the device to function reliably across a range of belt thicknesses.

Inventive Principle:
Principle #15Dynamics

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 configuration significantly extends the service life of conveyor belt junctions by preventing excessive extension of the upper plate and ensuring the lower plate's breaking strength handles tensile forces, reducing fatigue and allowing compatibility with different belt thicknesses.

Implementation Method 1

the upper plate (2), during use, being placed against the outer face of the ends of the conveyor belt (E), the lower plate (3) being, during use, placed against the inner face of the ends of the conveyor belt (E)... the extensibility and compressibility properties of the reinforcements differ, in particular greatly

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

the limit of extensibility of the strongly reinforcing armatures extensible under the effect of tensile forces is not reached before, under the effect of equivalent tensile forces, the failure of the inextensible or quasi-inextensible reinforcement occurs

Methodology Applied
Scientific EffectTensile strength: Tension

Implementation Method 3

when passing over the rollers, in particular the return rollers, there is an extension of the upper face of the conveyor belt in the longitudinal direction and compression of the underside of the conveyor belt in the longitudinal direction, this extension and this compression being transmitted to the upper plate of the joining device and respectively to the lower plate of the joining device

Methodology Applied
Scientific EffectDifferential deformation: Deformation

Data Source

PatentEP3189251B8Junction device for conveyor belts
Publication Date: 2018.07.25 MLT MINET LACING TECH

AI summary

The invention relates to a junction device for a conveyor belt, comprising an upper plate (2) and a lower plate (3). The upper plate (2) comprises a highly expandable frame (7) and the lower plate (3) comprises a non-expandable or almost non-expandable frame (8). The two plates (2, 3) can be attached to the ends of a conveyor belt which are inserted between the two plates, thereby transforming said conveyor belt into an endless belt.