Cargo mine hoist

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

The evolution of the means of lifting from mines and mine shafts originates from the advent of mining as such. The need to extract minerals to the surface forced engineers to develop special mechanisms and structures. The first systems of this kind were mechanical and were set in motion by muscular effort. A modern mine hoist performs the same tasks, but differs in high power, load capacity and the presence of effective safety systems.

General information about mine hoists

The design of such shafts and the principle of operation resembles the function of a conventional elevator. As part of the lift, a cabin or a platform on which the load is located is necessarily provided. However, there are many differences from conventional tools of this kind. Firstly, the unit is focused on working with large masses. Secondly, the very action of the mechanisms that set the platform or cabin in motion is different. In this sense, it is worth noting the division according to the type of auxiliary infrastructure. There are mine mast lifts and cargo models. The differences between them lie in the nature of the technical implementation of the channel through which the site is moved. In the case of mast devices, it is assumed to userack, on which there is a rise in height.

Classic cargo mechanisms involve movement along the channel in a structure that supports the cab from all sides. But in this case, due to the massiveness of the auxiliary infrastructure, the mine hoist has less capacity. Such complexes are more often used for lifting people and as emergency elevators.

Types of mine cargo lifts

Besides the differences in approaches to the execution of the mine itself, lifts have many other features that determine the corresponding classifications. For example, recently there has been a shift away from the technology of using single-rope systems. The use of several communication lines allows optimizing mine cargo hoists, in terms of mass, by getting rid of gearboxes. As a result, the cost of cars also decreases. Mechanisms are also distinguished by the type of rope mass stabilizers. Today, the application of dynamic and static balancing principles is practiced.

There is also a classification according to the purpose of the lifts. In the category of trucks, one can single out the main channels through which the bulk of the minerals are extracted, and auxiliary ones. The second type is a mine hoist that can be used for both rock handling and people placement.

Elevator device

Any shaft lifting installation has a complex system that includes severalinterconnected units and assemblies. As a rule, the list of main mechanisms includes a vessel, winding elements, a propulsion system and a set of pulleys. A separate group of devices provides interfacing between functional components. To implement this infrastructure, the mine hoist is equipped with the mentioned ropes, shaft lines and couplings. The structural base is usually represented by a carrier platform, which may be flat or in the form of a pit. Special push-button posts are used to control the structure.

Main Features of Cargo Lift

One of the main performance characteristics of cargo lifts is the power of the power unit. In the latest modifications, designers use electric motors with a power of up to 5 watts. Asynchronous electric motors are also common, the power potential of which varies on average from 1 to 2 watts. Such power indicators determine the speed modes from 12 to 20 m / s. As for the ability to work with the mass, the mine-type lift is capable of extracting cargo up to 70 tons. There are also models with higher carrying capacities, but these are, as a rule, single units for specialized needs. In this case, the height of the trunk can reach 2 km.

Security systems

Because mining is inherently high-risk, lift manufacturers pay special attention to safety systems. Without fail, modern designs are equipped with brake catchers. Suchdevices are activated in cases of rope breakage. By the way, such risks largely led to the transition to multi-rope cargo lifts. Mine complexes of this type are distinguished by reliability and stability when lifting. As auxiliary safety systems, limit switches are also used, which block the launch of the site if the personnel did not lock the cabin doors and doors. Automated systems also have special modes of operation in case of failure of certain mechanisms and controls.

Conclusion

Today, a cargo lift is the main type of technical tool that allows you to extract minerals from the bowels of the earth. The only alternative to vertical systems are inclined shafts, which transport rock and workers at an angle. Such designs are characterized by higher performance and reliability, but their implementation is not always possible. Therefore, the vertical cargo hoist of the mine type remains the main transportation facility in mining. The efforts of most mining enterprises are aimed at technological improvement of such complexes. The load-bearing components, control posts, and power mechanisms, on which the dynamic qualities of lifts depend, are developing. Since the regular operation of mining equipment is expensive in terms of energy costs, engineers are also looking for more rational approaches to the implementation of propulsion systems.