What Is a Pump Hoist?

Mine hoist refers to the main transportation equipment that connects underground and ground in mining engineering and mining engineering. A mine hoist is a hoisting machine installed on the ground and driven by a steel wire rope to move a hoist container along a shaft or a ramp. It is used in shafts and inclined shafts to lift coal, ore, vermiculite, as well as lift personnel, lowering materials, tools and equipment. ^[1]

The mine hoist is sometimes called a mine elevator. It is a special form of elevator and can also be regarded as a simple lift. In the engineering of conveying people and objects in a mine, a mine hoist is a very important conveying tool. Mine, especially the underground conditions and working environment are relatively harsh compared to the ground, so the safety of the mine hoist must be guaranteed, and a series of issues such as its structure, working characteristics and design methods must be carefully understood and mastered.

The main structural forms produced in China are: single-rope winding type with single-cylinder and double-cylinder mine hoists; friction-type multi-rope floor-standing and tower-type multi-rope friction hoists. The dragging method is designed as required. In addition, there are hydraulic transmission mine hoists, etc. that are used underground.

The common forms of mine hoists in China are mainly single rope winding type and multiple rope friction type. Compared with the more developed countries in the world, the mines in our country have smaller mine types, shallower mine lift heights, more coal mines, and other mines (such as

Mine hoist is mainly composed of working mechanism, braking system, mechanical transmission system, lubrication system, observation and operating system, and drag, control and safety protection system.

(1) Working mechanism , including spindle device and

According to different working principles and structures, hoists can be divided into winding hoists and friction hoists. The winding hoist is divided into a single rope winding hoist and a multi-rope winding hoist according to the number of ropes on its drum.

There are three types of single rope winding hoist: single drum, double drum and separable drum according to the number and structure of drums. It works reliably and has a simple structure. It is only suitable for shallow and medium-depth mines, and the terminal load cannot be too large. In deep wells with large terminal loads, the diameters of the hoisting ropes and hoist drums are large, resulting in a large volume and a sharp increase in gravity, which makes the hoisting ropes and hoists inconvenient in the manufacturing, transportation and use processes. Therefore, the use of the single rope winding hoist in deep well conditions is limited to a certain extent.

The multi-rope winding hoist is also called the Breer hoist. Several hoisting wire ropes of the multi-rope winding hoist are wound on a segmented drum at the same time. It belongs to the multi-rope multi-layer winding type, which is mainly used for deep and ultra-deep well hoisting.

Friction hoists can be divided into multi-rope friction hoists, single-rope friction hoists and built-in hoists according to the number of friction ropes. ^[4]

1) Organize installers to the construction site to check whether the foundation meets the installation requirements, and clean up the installation site.

2) Shovel the foundation parts that need secondary grouting (bearing beam, brake seat, reducer, motor base, etc. in the lower part of the main shaft device) into a rough surface, remove oil, and flush the foundation with water.

3) The place where the horn is placed should be leveled, ground or smoothed with 1: 2 cement sand.

4) Unpack the equipment, check the quantity, clean the anticorrosive and rust remover on the friction surface.

5) Check the installed elevation, the centerline of the spindle and the centerline of the hoist, and check whether the reference point is complete and accurate.

When installing a mine hoist, construction should be organized according to the sequence of the installation progress chart. In order to shorten the installation period, the division of labor should be reasonably allocated, and parallel operations should be implemented. The main operation line runs through the entire line. Priority will be given to projects with longer intervals to prevent rework due to process inversion. E.g:

Install the main shaft first, and the electric control equipment can be used for construction.

After the main shaft is fixedly installed, the reducer is installed with the main shaft coupling as a reference, and at the same time, the roll assembly and the motor are ready for operation.

After the reducer is installed, the motor is installed based on the high-speed shaft coupling, and at the same time, some people can be organized to assemble the reel. At this time, the motor can also be put out and connected.

After the motor is installed, the main components of the hoist have been installed. At this time, organize the construction of the lubrication system and the brake system. If the brake discs and reels are to be welded on site, the welding must be completed and the brakes must be completed. Do not assemble the brake system until after the disc.

The complete installation of the machine must be inspected and accepted by the relevant departments at the superior level, leaders at all levels and responsible persons in charge of engineering and technology, and run dry. Before the dry run, fine-adjust the top wire device to prevent the main shaft bearing beam and the reducer from being dead Loose. The second grouting can only be done when the air is running normally. ^[5]