Rotating Return Conveyor for Mobile Crusher Pile Separation
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Solution Overview
Problem
Existing mobile apparatuses for comminution of chunk materials face challenges in efficiently separating and managing comminuted material with different grain sizes due to limited height adjustability and complexity in avoiding pile mixing, which restricts production output.
Innovation Solution
The return conveying device is equipped with at least two conveying sections mounted via rotational joints, allowing it to be turned away from the charging device, enabling flexible transport and separation of material into distinct grain size ranges without significant design or operational complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single conveying section is used in the return conveying device, then the design is simple, but the material cannot be separated into distinct piles by grain size
Solution Approach 1:
The return conveying device is divided into multiple conveying sections (first conveying section and second conveying section) that can be independently positioned. The first conveying section returns coarse material to the charging device, while the second conveying section transports screened material away from the apparatus to a separate pile, enabling grain size separation without excessive design complexity.
2Device complexity
If the removal conveying device has limited height adjustability, then the design is simple, but the possible pile height of screened material is limited
Solution Approach 1:
Instead of increasing height adjustability in the vertical dimension, the solution adds a second conveying section that operates in a different spatial dimension (horizontal extension away from the apparatus). This allows screened material to be deposited on piles at a distance from the apparatus, effectively increasing possible pile height without complicating the vertical adjustment mechanism.
3Productivity
If coarsely comminuted material is thrown onto a pile next to the screening device, then the return conveying device can be circumvented, but pile mixing occurs and the apparatus must be spaced apart
Solution Approach 1:
The second conveying section extracts the screened material from the immediate vicinity of the screening device and transports it away to a separate discharge location. This spatial separation prevents mixing between coarse material (returned by the first conveying section) and screened material (transported by the second conveying section), eliminating the need to space piles apart.
4Device complexity
If the conveying section is fixed in position, then the design is simple, but the transport path cannot be adapted to local conditions
Solution Approach 1:
The conveying sections are made adjustable in their positioning relative to the chassis and each other. This dynamic capability allows the transport path to be adapted to different local conditions and operational requirements, such as varying distances to material piles or different angles for material discharge, without requiring a completely different apparatus design.
Data Source
AI summary
A mobile apparatus for comminuting lumpy material, especially rock, includes a chassis, a crusher arranged on the chassis, a feed device, provided on the chassis, for the lumpy material to be fed to the crusher and comminuted, a removal conveying device having a sieve device for the material comminuted by the crusher and a return conveying device for returning material held back by the sieve device to the feed device. In order to ensure heap separation of comminuted material of different grain sizes despite high crushing throughput, one conveying section of the return conveying device including at least two conveying sections is secured to the device by at least one rotational joint such that it can be turned away from the feed device.