Large slope lifting device for strip mine dump truck

Abstract

The invention discloses a large slope lifting device for a strip mine dump truck. The large slope lifting device comprises a power lifting device, a guiding device, a limiting and positioning device, a monitoring and controlling device and a safety protection device. A motor and a drum hoist are arranged on the ground. U-steel tracks are laid on the slope of a mountain through sleepers. The U-steel tracks are divided into an upper part and a lower part, and the upper U-steel tracks and the lower U-steel tracks are provided with a first wheel-type trolley and a second wheel-type trolley respectively. A wire rope winds across guide wheels and fixed pulleys located on the first wheel-type trolley and the second wheel-type trolley to be connected with the drum hoist. According to the large slope lifting device for the strip mine dump truck, the lifting angle is large, the side slope of a mine field can be fully utilized, and thus the excavation amount of infrastructure is reduced. The limiting and positioning device can contribute to stability of mine cars in the lifting process. By means of large slope lifting, the transportation distance and time are greatly shortened, transportation efficiency is improved, and tail gas pollution is reduced. The monitoring and controlling device can control the safety protection device to act in the derailing process, and therefore safety during transportation is improved.

Description

technical field [0001] The invention relates to a lifting transport device, in particular to a large-slope lifting device for dump trucks in open-pit mines. Background technique [0002] At present, for the ore transportation of open-pit mines, most of them are transported by mining dump trucks, railways, belt conveyors or skip hoists. Mining dump trucks have low transportation infrastructure costs, wide application range, flexible vehicles, and convenient transportation. However, with the deepening of the mining depth, the climbing angle of the car is only 8°-15°, which makes the transportation route increase in twists and turns, and the consumption of fuel and tires for car transportation is large. There must be a maintenance base for car maintenance and repair. Efficiency decreases, and automobile transportation will also cause air pollution in the mine; railway transportation has the advantages of low transportation cost, large transportation volume, sufficient equipmen...

AI Technical Summary

Problems solved by technology

However, with the deepening of the mining depth, the climbing angle of the car is only 8°-15°, which makes the transportation route increase in twists and turns, and the consumption of fuel and tires for car transportation is large. There must be a maintenance base for car maintenance and repair. Efficiency decreases, and automobile transportation will also cause air pollution in the mine; railway transportation has the advantages of low transportation cost, large transportation volume, sufficient equipment supply, and adaptability to various climatic conditions, etc., but requires a large stope size, a large amount of infrastructure engineering, and a long time , large investment; belt conveyor has the advantages of large transportation capacity, low environmental pollution, and high degree of automation, but the ore wears heavily on the belt, and there will be a jamming accident in the transportation of viscous or water-containing ore, which will affect the life of the belt; the advantage of skip transportation is its It can lift the inclination angle up to 40°-45°, the amount of infrastructure construction is small, the skip equipment is simple, easy to check and maintain, and the cost is low. The main disadvantage is that one reloading station is required at the bottom of the mine and one on the ground, which increases transportation costs and annual output. Not high, the scope of application is limited

[0003] A self-driven vehicle lifting device for open-pit mining vehicles (CN101020554A), which proposes to use the driving force of the vehicle itself to lift heavy-duty vehicles from the bottom of the stope to the surface. Retrofit, and only use the engine of the mine truck as the power source, lack of stability and reliability

According to the structural analysis of the new self-driven vehicle hoist (Metal Mine, No. 3, 2006), the main risk factors of the system structure of the device are the relationship between traction force and slope, the vertical crawling of climbing rack and load-bearing rail, and the reliability of the chain mechanism, etc.; The main risk factors affecting the operation of the system are the asynchronous travel gears on both sides, incomplete meshing between the travel gear and the rack, and the backward tilt of the heavy-duty wheeled trolley, etc.; the main risk factors affecting the system operation are the driver's misoperation and his own quality The increase of human factors reduces the reliability of the system; the maximum slope angle allowed by the device is 42°, and the operating speed is 0.5-0.8m / s; the speed is very low, and the slope length corresponding to a slope of 42° is longer, and the corresponding lifting amount is not high

According to the review of vehicle hoisting and transportation technology for open-pit mining vehicles (Metal Mining, No. 3, 2006), when a 20-50t dump truck is used, the annual production capacity of a single hoist is 1-3 million tons, which is very It is difficult to meet the production needs of modern large-scale open-pit mines. If multiple systems are established, the cost will be huge

According to the research on self-propelled vehicle lifting transportation system for open-pit mining vehicles (Ph. As the depth of the stope increases, the applicability of this method decreases, which will increase the wear of the mine car and shorten the service life

A vertical lifting transportation system for open-pit mining vehicles (CN104843572A). This system realizes the vertical lifting of mining vehicles, but the system is a single lifting and a single lowering, and the efficiency needs to be improved; After the emergence, only the hydraulic rail clamp brakes the parking platform, which requires high control and safety needs to be improved; the vertical lifting system needs to excavate a large number of mountains, and the amount of infrastructure engineering is large

Images