Rocker Arm Cushioning Device for Mine Shaft Impact Reduction
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Solution Overview
Problem
High-speed gangues in backfill mining systems cause significant impact force upon reaching the mine shaft bottom, potentially damaging the down-hole storage silo and reducing resource yield.
Innovation Solution
A mechanical rocker arm-type vertical feeding cushioning device with staggered cushioning units, comprising cushioning plates, springs, balance weights, and elastic limiting devices, which absorb and distribute the impact force across the storage silo walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gangues are thrown from high level to mine shaft bottom, then coal yield is increased and ground surface control is achieved, but impact force damages the storage silo wall
Solution Approach 1:
The patent installs cushioning devices at the bottom of the feeding pipe before the gangues reach the storage silo. These devices include elastic elements (springs, rubber buffers) and energy-absorbing structures that are pre-positioned to cushion the falling gangues, converting their kinetic energy into elastic potential energy and reducing the impact force on the silo wall before damage can occur.
Solution Approach 2:
The patent introduces intermediary cushioning elements between the falling gangues and the storage silo wall. These intermediaries (cushioning plates, elastic buffers, energy-absorbing structures) act as mediators that absorb and dissipate the impact energy, preventing direct contact between the high-speed gangues and the silo wall, thereby protecting the silo structure.
2Reliability
If cushioning devices are added to reduce impact force, then storage silo is protected, but device complexity increases
Solution Approach 1:
The cushioning device is segmented into multiple independent functional modules: elastic cushioning elements (springs, rubber buffers), energy-absorbing structures (deformable plates, crushable elements), and mounting components. These segmented modules can be independently designed, installed, and maintained, reducing overall system complexity while achieving effective impact protection.
Solution Approach 2:
The patent utilizes parameter changes in the cushioning materials and structures, such as varying the elasticity modulus, damping coefficients, and geometric parameters of the cushioning elements to optimize impact absorption. By adjusting these parameters, the device achieves effective silo protection with relatively simple structural configurations.
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
Effectively reduces the impact force of falling materials, prolongs the service life of storage silos, and ensures safe and efficient material feeding in backfill mining operations.
Implementation Method 1
the cushioning mechanism comprises a cushioning plate, a spring, and a balance weight
Implementation Method 2
the material falls down after being cushioned twice by the two cushioning plates; the cushioning device repeatedly cushions and recovers
Implementation Method 3
the upper end of the spring is connected to the right-angle round rod and the lower end of the spring hangs the balance weight
Data Source
AI summary
A mechanical rocker-arm type vertical feeding cushioning device, consisting of two identical cushioning units and a box body (7). The two cushioning units are respectively arranged with a certain height difference on the inner side of the box body (7). Each cushioning unit consists of a cushioning mechanism and a fixing hinge mechanism. The cushioning mechanism is composed of a cushioning plate (1), a spring (5) and a balance weight (6). The fixing hinge mechanism is composed of a hinge plate (2), a right angle circular rod (3) and an elastic limiting device (4). The cushioning plate (1) is fixed to the hinge plate (2) via connection holes and using bolts. The hinge plate (2) is welded to the right angle circular rod (3). The elastic limiting device (4) consists of two elastic limiting plates and a hollow iron ring in a welded manner. The right angle circular rod (3) is connected to the elastic limiting device (4) in a sleeved manner via the hollow iron ring of the elastic limiting device (4). An upper end of the spring (5) is connected to the right angle circular rod (3), and the balance weight (6) is suspended at a lower end of the spring (5). Material is fed to the cushioning plates via a feeding pipe, and falls down after being cushioned twice by the cushioning plates (1). The cushioning device repeatedly cushions and recovers under the joint effect of the cushioning plates (1) and the cushioning balances (6).