Split-Deck Screen Box Carriage for Lower Deck Maintenance Access
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Solution Overview
Problem
Existing split-deck screening devices require difficult and time-consuming maintenance procedures due to fixed positioning of primary and secondary screen boxes, necessitating removal of upper decks to access lower decks, especially in remote locations where specialist equipment is needed.
Innovation Solution
A split-deck screening device with a sub-frame carriage that allows the primary screen box to be moved laterally and vertically away from the secondary screen box, enabling access to lower decks for maintenance without removing upper decks, using actuators for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the primary and secondary screen boxes are mounted to the main sub-frame in a fixed position, then the structural stability is improved, but the ease of repair deteriorates because maintenance of lower decks requires removal of upper decks
Solution Approach 1:
The patent applies the dynamics principle by making the primary screen box movable relative to the secondary screen box through a lifting mechanism. The primary screen box can be moved between a first position (for operation) and a second position (for maintenance access), transforming a static fixed-structure into a dynamic system that adapts to different operational and maintenance requirements.
2Ease of repair
If the primary screen box is moved away from the secondary screen box, then the ease of repair is improved by providing access to lower decks, but the device complexity increases due to additional lifting mechanisms
Solution Approach 1:
The lifting mechanism serves multiple functions: it enables maintenance access to lower decks, allows adjustment of the primary screen box position for optimal screening performance, and provides flexibility for cleaning and inspection operations. This multi-functionality justifies the added complexity by consolidating several operational requirements into a single mechanism.
3Ease of repair
If specialist lifting equipment is brought to remote locations for maintenance, then the ease of repair is improved, but the loss of time increases due to equipment transport and setup
Solution Approach 1:
The screening device incorporates its own lifting mechanism, enabling self-service maintenance operations. The primary screen box can be moved using the integrated lifting mechanism without requiring external specialist equipment, allowing maintenance personnel to perform repairs on-site at remote locations without waiting for heavy lifting equipment to be transported and set up.
Data Source
AI summary
A split-deck screening device for screening bulk material includes a main sub-frame, a primary screen box including a plurality of screening decks having a loading end to receive bulk material and an opposite discharge end to discharge non-screened material, a secondary screen box mounted to the main sub-frame including a plurality of screening decks having a loading end adjacent to the discharge end of the primary screen box and a discharge end to discharge unscreened material. A sub-frame carriage couples a primary screen box sub-frame to the main sub-frame and moves the primary screen box from an operative position wherein the discharge end of the primary screen box is adjacent to a loading end of the secondary screen box to an inoperative position wherein the primary screen box is spaced above and from the secondary screen box to provide access to any lower screening decks of the secondary screen box.