Portal Scraper Modular Truss Structure for Adjustable Track Width
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Solution Overview
Problem
Existing portal scrapers require significant redesign and effort to change the track width, leading to uneven load distribution and increased construction complexity due to their box-shaped support structures and fixed boom mounting.
Innovation Solution
A portal scraper with a truss structure and modular components, including adaptable truss and boom pieces, allowing for adjustable track width and reduced assembly time, weight, and improved load distribution through a symmetrical boom arrangement and interchangeable chain system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the track width is increased to improve operational efficiency, then the portal scraper can handle larger bulk material heaps, but the load distribution on the chassis becomes uneven and requires significant redesign effort
Solution Approach 1:
The supporting structure is divided into modular truss construction pieces that can be independently assembled and configured. The boom is segmented into interchangeable pieces of different lengths, allowing the track width to be adjusted by reconfiguring these modules rather than redesigning the entire structure.
Solution Approach 2:
The portal scraper is designed with adjustable and interchangeable components that allow dynamic reconfiguration of the track width. The boom can be exchanged for pieces of different lengths, and the truss construction can be adapted, enabling the system to dynamically adjust to different operational requirements without permanent redesign.
2Stability of the object's composition
If the support structure is designed as a box-shaped structure to ensure stability, then the portal scraper maintains structural integrity, but the weight increases and production time extends
Solution Approach 1:
The support structure is segmented into truss construction pieces that can be pre-assembled in workshops and then quickly connected on-site using screw connections, eliminating time-consuming welding operations while maintaining structural integrity through the truss design.
Solution Approach 2:
Welding connections are replaced with screw connections in the truss construction, substituting a complex, time-consuming mechanical process with a simpler, faster assembly method that maintains structural strength while significantly reducing production time.
3Ease of operation
If the boom is mounted to the side of the supporting structure to achieve larger vertical pivoting angle, then the scraping range is improved, but the load distribution on the portal structure becomes uneven
Solution Approach 1:
The boom and supporting structure are designed with asymmetrical features including an inclined section in the truss construction that compensates for the side-mounted boom configuration, distributing loads more effectively while maintaining the large vertical pivoting angle necessary for operational effectiveness.
4Adaptability or versatility
If the track width is changed for different bulk material storage facilities, then the portal scraper can adapt to various facilities, but the construction effort and redesign requirements increase significantly
Solution Approach 1:
The portal scraper is designed with universal, interchangeable boom pieces of different lengths and modular truss construction components that can be configured for different track widths. This multi-functional design allows a single base model to serve multiple facilities with different dimensions without requiring complete redesign.
Solution Approach 2:
The track width parameter can be changed by exchanging boom pieces of different lengths and adjusting the truss construction configuration, allowing the portal scraper to adapt to different facilities through parameter modification rather than structural redesign.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A portal scraper (1, 16) for reclaiming bulk materials, comprising a load-bearing structure (2) which can be displaced along a stockpile (19), and is based on a framework structure (3), and a boom (4, 17, 18), which can be raised or lowered in a vertical plane by means of a cable-deflection arrangement (5) which acts on the load-bearing structure (2) and the boom (4), the load-bearing structure (2) having at least one inclined portion spanning the stockpile, is characterized in that the framework structure (3) contains at least one framework-structure adapter piece (6) and the boom (4, 17, 18) contains at least one boom adapter piece (7), and therefore the portal scraper (1) can have its gauge (10) altered in modular fashion in accordance with the length (9) of the boom adapter piece (7), wherein the length (8) of the framework-structure adapter piece (6) and the length (9) of the boom adapter piece (7) are coordinated with one another.