Technological Advances in Mine Hoists and Analysis of Practical Operation Cases

Mine hoist

The mine hoist is a key component of the hoisting system, bearing the critical responsibility of vertically lifting personnel, ore, and materials within the mine shaft.

Mine hoists can be classified into the following types according to different classification criteria:

(1) According to the connection method of wire ropes on the drum, they can be classified as: winding type (single-rope winding, multi-rope winding) and friction type (single-wheel, multi-wheel).

(2) According to the number of lifting ropes, they can be classified as single-rope and multi-rope systems.

(3) By main drive method: electric drive, hydraulic drive

(4) By drum structure type: ① Cylindrical (generally cylindrical drums, separable cylindrical drums) ② Conical ③ Cylindroconical ④ Winch

(5) By electrical drive type: AC, DC

(6) By number of drums: single-drum, double-drum

(7) By on-ground or underground use: surface-mounted, underground-mounted

Mine hoisting winch

Operators performing maintenance on mine hoisting winches must strictly adhere to operating procedures and conduct regular maintenance and inspections to ensure the safety of personnel and production.

1. Daily inspection: Includes checking the wire ropes for wear and broken wires, the tightness of connections between various components, the performance of the braking system, and the operational status of the electrical system, among other things.

2. Steel wire rope maintenance: Regularly lubricate the steel wire rope and promptly replace any ropes that have reached the scrap standard.

3. Brake System Maintenance: Inspect the wear level of brake pads, adjust the brake clearance, and ensure reliable braking performance.

4. Gearbox maintenance: Check the oil quality and level inside the gearbox, replace the lubricant promptly, and inspect the meshing condition of the gears.

5. Electrical System Inspection: Clean dust from electrical equipment, check that wiring connections are secure, and test the functionality of various protective devices.

6. Lubrication of mechanical components: Regularly lubricate all rotating parts, bearings, and other components.

7. Troubleshooting and Repair: When a fault occurs, promptly and accurately identify the cause of the fault and carry out targeted repairs.

8. Verification of safety protection devices: Regularly verify safety protection devices such as overtravel, overspeed, and speed-limiting devices to ensure their sensitivity and effectiveness.

9. Equipment Cleaning: Keep the winch and its surrounding area clean to prevent debris from interfering with operation.

Multi-rope friction hoist

Multi-rope friction hoists are widely used in industries such as mining, metallurgy, and construction. They are critical equipment for mine hoisting, capable of efficiently and safely lifting various materials and personnel.

In mines, it plays a crucial role in lifting ore, coal, and other materials from underground to the surface. In the metallurgical industry, it is used to hoist high-temperature molten metals such as steel and iron. On construction sites, it helps lift building materials, thereby enhancing construction efficiency. Thanks to its stable and reliable performance, multi-rope friction hoists provide strong support for production and operations across numerous industries.

Well-drilling winch

A well-drilling winch is a large-scale mechanical equipment used in projects such as mines and tunnels. It features strong lifting capacity and stable operation.

(1) In terms of structure, it typically features a robust frame and a reliable transmission system.

(2) Functionally, it can provide greater lift and stable operation to meet the demands of deep-well operations.

(3) In terms of operation, the system generally features a simple and user-friendly control interface, enabling operators to perform precise control with ease.

(4) In terms of safety, various safety protection devices are provided, such as overtravel protection and overload protection, to ensure safety during the operation process.

Well-drilling winches come in various models and specifications, differing in parameters such as lifting capacity and drum diameter, and can meet the construction needs of shafts of different scales and under varying conditions. They play a crucial role in projects such as mine construction and are among the key pieces of equipment that ensure the smooth progress of shaft excavation.

Derrick

The derrick is a device used during drilling or workover operations to support the crown block, suspend traveling blocks, large hooks, lifting ears, and lifting slips, as well as to hoist, lower, and store drill pipes, tubing, and sucker rods.

The requirements for the derrick are:

1) It should have sufficient strength, stiffness, and overall stability to ensure the safe running and pulling of drill pipe strings, casing strings, or tubing strings to a certain depth.

2) Sufficient working height and space, as well as ample rig floor area. A greater working height allows for longer lengths of drill pipe to be run in and out, resulting in faster operations and significant time savings. The upper and lower sections of the derrick should have adequate dimensions to accommodate the crown block and ensure unobstructed movement of the traveling system equipment during make-up and break-out operations. This also facilitates the efficient arrangement of equipment and tools on the rig floor, provides convenient access for workers, and gives the driller an excellent field of vision.

3) The design should ensure easy and safe disassembly and assembly, as well as rapid mobility. To achieve this, the structure should be simple and lightweight, and whenever possible, it should be transported in sections or as a whole unit, with installation and relocation methods involving horizontal placement and integrated lifting and lowering.