Screw Conveyor Support Unit for Pivoting Drive Maintenance

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Solution Overview

Problem

Screw conveyors in industrial settings require significant manual effort and time for disassembly and maintenance due to the handling of heavy components, posing risks of injury and hygiene issues.

Innovation Solution

A screw conveyor arrangement with a support unit that allows the drive unit to be pivoted and/or slid away from the casing, facilitating safe and efficient access to the helical screw and internal channel during maintenance, reducing manual handling and strain.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the drive unit is bolted or firmly attached to the casing, then the screw conveyor is stable during operation, but disassembly and maintenance require significant manual work and time

Engineering Contradiction:

Improvestability during operationVSAvoiddisassembly and maintenance

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The connection between the drive unit and casing is made dynamic through a detachable coupling mechanism with coupling elements that can be engaged and disengaged. This allows the connection to be firm during operation (providing stability) but easily separable during maintenance (reducing disassembly effort), directly resolving the contradiction between operational reliability and ease of repair.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If the drive unit is detached from the casing for maintenance, then access to the helical screw and internal channel is improved, but manual handling of heavy components increases injury risk

Engineering Contradiction:

Improveaccess to helical screw and internal channelVSAvoidinjury risk from heavy component handling

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A support unit acts as an intermediary between the detached drive unit and the casing. This support unit provides temporary support to the heavy drive unit during the maintenance process, reducing the manual handling burden on service personnel while still allowing full access to the helical screw and internal channel, thus resolving the contradiction between ease of operation and injury risk.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of repair

If multiple access points are provided for maintenance, then serviceability is improved, but hygiene is compromised due to increased contamination risk

Engineering Contradiction:

ImproveserviceabilityVSAvoidcontamination risk

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The drive unit is extracted as a complete assembly from the casing through the single access point at the first end. This extraction mechanism allows full serviceability of the drive unit and access to the helical screw through one controlled opening, minimizing the number of access points and thereby reducing contamination risk while maintaining ease of repair.

Inventive Principle:

Principle #2Taking out (Extraction)

4Strength

If the drive unit is made heavy for robust construction, then durability is improved, but handling during maintenance becomes more difficult and time-consuming

Engineering Contradiction:

Improvedurability of drive unitVSAvoidmaintenance time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The coupling mechanism segments the connection system into detachable coupling elements, allowing the heavy drive unit to be separated from the casing without requiring complete disassembly of all fasteners. This segmentation enables quicker detachment and reattachment of the heavy component, reducing maintenance time while preserving the robust construction and durability of the drive unit itself.

Inventive Principle:

Principle #1Segmentation

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 support unit reduces the time and effort required for maintenance, enhances safety by minimizing manual handling of heavy components, and improves hygiene by limiting access points for contamination.

Implementation Method 1

a support unit which is attached to the casing and to the drive unit and configured to define a pivoting movement of the drive unit away from the first portion when the drive unit has been released from the casing

Methodology Applied

Scientific EffectPivoting movement: Hinge

Data Source

PatentEP4112508B1Screw conveyor arrangement with support unit

Publication Date: 2026.01.07 TETRA LAVAL HOLDINGS & FINANCE SA

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AI summary

A screw conveyor arrangement is configured to convey a material, for example a food powder, in a processing plant. The screw conveyor arrangement comprises a casing (10) with an internal channel (11), and a helical screw (14) in the channel (11). A drive unit (20) is releasably connected to a first portion (16A) of the casing (10) to engage the helical screw (14). A support unit (30) is attached to the casing (10) and the drive unit (20) to define a pivoting movement (D1) of the drive unit (20) away from the first portion (16A) when the drive unit (20) has been released from the casing (10). The support unit (20) facilitates handling of the drive unit (20) during maintenance and service, for example cleaning, and allows the drive unit (20) to be swung away to provide access to the helical screw (14) and the channel (11). The support unit (30) may be provided for attachment to existing screw conveyors.