Skip Anti-Blocking System Using Mechanical Vibration
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Solution Overview
Problem
Large-tonnage mining skips experience frequent blocking issues due to compacted coal at the bottom and high friction, leading to inefficient unloading, labor-intensive unblocking methods, and safety hazards.
Innovation Solution
The system employs parallel guide rails, pulleys, impact plates with hydraulic cylinders and vibration motors to create controlled vibrations for dislodging adhered materials, with adjustable vibration frequencies and amplitudes to address different adhesion levels, ensuring safe and efficient unloading without damaging equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-tonnage skip is used to increase loading capacity, then productivity is improved, but the skip is prone to blocking due to compacted coal and long lifting cycle
Solution Approach 1:
The patent applies mechanical vibration through vibration motors mounted on the skip to prevent coal compaction and adhesion during the lifting cycle. The vibration disrupts the coal mass, preventing it from compacting against the skip walls and bottom, thereby eliminating the blocking problem while maintaining large loading capacity
Solution Approach 2:
The vibration motors operate periodically during the lifting cycle, specifically activated when the skip is in the lifting phase. This periodic vibration action is synchronized with the lifting cycle to continuously prevent coal compaction without interfering with the loading and unloading operations
2Productivity
If coal is loaded continuously to increase efficiency, then productivity is improved, but coal compaction at the bottom leads to unloading blocking
Solution Approach 1:
Vibration motors are mounted at the bottom and sides of the skip to apply mechanical vibration that prevents coal from compacting during continuous loading. The vibration keeps the coal mass loose and fluid, ensuring smooth flow during unloading without disrupting the continuous loading process
3Reliability
If traditional hammering method is used to unblock the skip, then blocking is removed, but labor intensity increases and safety risks arise
Solution Approach 1:
The skip performs self-unblocking through automatically activated vibration motors when blocking is detected. The system monitors coal flow conditions and activates the vibration mechanism without human intervention, allowing the skip to clear itself of blocked material. This eliminates the need for manual hammering by miners, dramatically reducing labor intensity and safety risks while maintaining effective unblocking
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 system effectively reduces skip blocking, enhances safety and efficiency by using a combination of hydraulic and vibrational forces to dislodge materials, maintaining normal skip operation and preventing accidents.
Implementation Method 1
the vibration motors are started, and the materials blocking the inner wall of the skip are shaken off through small-amplitude and high-frequency vibration provided by the vibration motors
Implementation Method 2
the vibration motors can be stopped, telescopic impact force of the hydraulic cylinders makes the skip generate large-amplitude and high-frequency vibration, and thus blocking caused by the large-adhesion materials is solved
Implementation Method 3
the buffer springs can reduce force of the vibration motors being transmitted to the hydraulic cylinders so as to prevent damage to the hydraulic cylinders during vibration of the vibration motors
Implementation Method 4
make the adhesion materials separated from the inner wall of the skip and unloaded from an unloading opening due to a gravity effect
Data Source
AI summary
A large-tonnage skip anti-blocking system includes a skip, wherein two parallel rows of guide rails are fixed to upper and lower shaft walls of a shaft on two sides of the skip correspondingly, a plurality of pulleys are mounted on the guide rails in a matched mode, impact plates are mounted between the upper and lower pulleys, front plates of the impact plates are mounted between the upper and lower sets of pulleys in the front row, rear plates of the impact plates are mounted between the upper and lower sets of pulleys in the back row, a length of rib plates of the impact plates is greater than a width of the skip, hydraulic cylinder bases and vibration motors are mounted on outer sides of the rib plates at intervals.