What Is a Scraper Conveyor?

The conveyor that is hauled by a scraper chain and conveys bulk material in the tank is called a scraper conveyor. KS Scraper Conveyor The adjacent middle slot of the squeegee conveyor can be flexibly limited in horizontal and vertical planes. It is called a flexible scraper conveyor. Among them, the working surface conveyor set at a 90-degree bend at the intersection of the working surface 1 and the transportation lane is called a "corner scraper conveyor". In the current coal mining working face, the function of the scraper conveyor is not only to transport coal and materials, but also the running track of the coal mining machine, so it has become an indispensable main equipment in modern coal mining technology. The scraper conveyor can keep running continuously and the production can proceed normally. Otherwise, the entire coal mining face will be in a suspended state, interrupting the entire production.

Scraper conveyor

Traction with scraper chain to transport bulk materials in the tank

The main structure and components of each type of scraper conveyor are basically the same.

Scraper conveyor can be used for horizontal or inclined transportation. When transporting along an incline, the inclination of the coal seam shall not exceed 25 °, and when transporting downward, the inclination shall not exceed 20 °. When the inclination of the coal seam is large, anti-skid devices shall be installed.

The working principle of the scraper conveyor is to use the open chute as a support for coal, vermiculite or materials, etc., and fix the scraper on the chain (composing the scraper chain) as a traction member. When the machine head transmission is started, the sprocket on the head shaft of the belt machine rotates, so that the scraper chain runs in circular motion along the chute until the machine head is unloaded. The scraper chain runs around the sprocket for stepless closed loop operation to complete the conveying of materials.

The ancient high-roller and water-lifting rollovers in ancient China are the prototypes of modern bucket elevators and scraper conveyors;

In the 17th century, aerial ropeways were used

The development of scraper conveyors in the production and construction of coal mines has roughly gone through three stages. The first stage was a detachable scraper conveyor in the 1930s and 40s. It can only be laid in a straight line on the working surface. As the working surface advances, it needs to be disassembled, moved and assembled manually. Scraper chain is a plate type, mostly single chain, such as V-type, SGD-11, SGD-20 and other low-power light-weight scraper conveyors. The second stage is a bendable scraper conveyor made in Germany in the early 1940s. It cooperated with a coal cutter and a metal bracket to realize mechanized coal mining. This scraper conveyor is suitable for conditions such as uneven floor, unevenness, unevenness, and horizontal bending. It does not need to be disassembled during relocation, and the amount of coal transported has increased. For example, the model SGW-44 scraper conveyor at this time was this stage Representative products. Into the 60s due to

Scraper conveyor is coal mine, chemical mine,

Retraction sequence of scraper conveyor

Scraper and scraper chain Scraper conveyor tail and its transmission part cooling water pipe and cable Scraper conveyor head and its transmission part Bend transition groove of the head Middle groove and cable groove.

Disassembly, loading and bundling

1. When removing the scraper conveyor, power off and lock it first, and then open the scraper chain at the transition groove of the machine head. Lock the machine head motor to power the tail motor. The plate chain is spit out, and manually pulled to the side of the coal wall to load it out of the machine lane.

2. After the tail of the scraper conveyor is dismantled, the wind tunnel winch is used to disassemble the lifting device to disassemble it, and the transmission part is removed for loading. The specific method for loading the vehicle is to use two inverted chains to lift the two ends of the component and lift the platform at a certain height, and then push the flatbed vehicle into the equipment to load the vehicle. The lead wire is tightly bound, that is, the 8 # lead wire is first bundled and fixed at the four corners, and then two 18.5mm

1. All personnel participating in disassembly must be familiar with the equipment structure, performance and working principle. Disassembly must be carried out reasonably. Do not knock hard and pry hard. After the equipment is disassembled, the exposed shaft head and other parts must be wrapped with tape to prevent damage.

2. During the entire construction process, there must be a construction person in charge to direct the operation. Participating construction personnel must be focused, otherwise they must not participate in the construction.

3. During the construction period, tools and spare parts must be managed by a special person to avoid loss.

4. The main and auxiliary winches and other winch hoisting wire ropes must be inspected by a special person to check their intact condition. Each hoisting must be checked once, and records must be made. The quality of the hoisting wire rope must comply with "

(1) During the operation of the scraper conveyor, pay attention to check the tightness of the scraper chain, because the connection between the chute will reduce the distance due to the operation. If the chain is too loose, there will be accidents of jamming, skipping, breaking and falling. The inspection method is to reverse the conveyor and count the number of loose links. If there are more than two fully loose links, then Need to re-tighten the chain.

(2) Keep the working surface straight. If the working surface is not straight, the tension of the two chains will be unequal, which will cause uneven wear of the chain or cause the bottom chain to fall, jam or break.

(3) The bending of the conveyor should be appropriate, and no "sharp bend" should occur. The bend should be no less than eight chutes. When moving, pay attention to the cooperation of the front and rear hydraulic jacks to avoid sharp bends. Otherwise, the chute will be misaligned, which will cause chain accidents. Please pay special attention when the conveyor stops.

(4) The conveyor should be laid flat. Due to the limitation of the chute structure, it can only adapt to the change of 3'-5 'in the vertical direction, so the bottom surface of the working surface should be flat if there is local unevenness. And the smooth laying of the conveyor is conducive to the operation of the scraper chain, which can reduce the chute. Wear and tear and reduced power consumption.

(5) During the blasting, the transmission part of the conveyor and the pipelines, unit cables and switches must be protected. When the conveyor conveys iron and long materials, safety measures should be formulated to avoid personal accidents.

(6) Excessive bends are not allowed at the overlap of the transition tank tail and the middle tank. When there is a bend, a wooden board should be used.

(7) Pay special attention to the vibration of the coupling, and check the vibration of the hydraulic coupling when the conveyor is started. In order to protect the good heat dissipation conditions, the protective cover and the fluid should be cleaned frequently.

1. Dress neatly and work with valid documents.

2. Carry out the safety regulations of the coal preparation plant carefully, and be familiar with the post number and the post number.

Before installation:

Investigate the installation direction of the scraper on the working surface, the centerline of the belt conveyor, the mounting direction of the drive of the loader and the crusher, and design the supporting drawing of the scraper.

Installation work:

First, fix the self-moving tail device of the belt conveyor according to the centerline of the belt conveyor and the transport distance of the loader;

Install the transfer head, bridge trough, convex groove, crusher, coupling trough, crusher, push trough, double-sided trough, discharge trough and transponder tail in turn at the tail of the self-moving machine; lay the chain during the installation;

After installing the chain, install the U-bolt of the scraper (this step can first install the scraper on the chain, and install it directly during the chain laying process);

Mounting of reloader and hammer crusher drive;

Install the working surface scraper conveyor head and mount the head drive device;

Install the scraper transition groove, variable wire groove, middle groove and sunroof groove in order, and lay the scraper chain during the installation process;

Install tail transformer troughs and tails in sequence, and mount tail drive devices;

Install the scraper and beam (this step can be installed on the chain first, and installed directly in the process of laying the chain);

Check that the scraper conveyor is consistent with the drawing parameters before cable installation.

Install cables, water pipes, etc .;

Install control system and control line, install lock controller, explosion-proof telephone or megaphone, etc .;

Connect each drive power;

Connect the wires

Commissioning and commissioning.

The following is the installation of the belt conveyor. The installation of the belt conveyor can be synchronized with the installation of the scraper conveyor.

Before installation:

Install the belt conveyor after the transfer tower and silo are finished.

Precautions:

All belt conveyors are installed and adjusted in accordance with geological parameters and drawings.

Installation work:

Underline

Check civil construction, look at anchor bolts and embedded

Before installing the conveyor, be sure to install it after the transfer tower and silo are finished. The installation and adjustment of all conveyors should be performed in accordance with geological parameters and drawings.

Conveyor installation work steps:

1. draw a line

2. Inspect civil construction, check foundation bolts and embedded steel plates;

3. Check the position of each part of the conveyor;

4. Install the truss according to the anchor bolts;

5. Installation and adjustment equipment (including upper and lower supporting rollers, wipers, driving devices, etc.);

6. Install the tape hoist;

7. Install the telescopic head;

8. Install the material guide slot;

9. Install tensioning device;

10. Install all electrical parts brackets;

11. Tape cutting and vulcanization connection.

Installation steps of electrical part of conveyor:

1. Install cable ducts;

2. Install limit switches, protection devices, electrical control cabinets, etc .;

3. Install electric lights;

4. Laying cables;

5. Connect the wires.

At the end of the installation of the conveyor, the paint damaged parts should be repainted in accordance with the technical specifications. Secondly, add grease or lubricating oil according to the procedure specified in the lubricating oil operation manual to the following

Continue to large-scale development. Large scale includes several aspects such as large conveying capacity, large single machine length and large conveying inclination. The length of the hydraulic conveying device has reached more than 440 kilometers. The length of the single belt conveyor is nearly 15 kilometers, and there have been several "belt conveyors" that connect the two places. Many countries are exploring more perfect conveyor structures for long-distance, large-volume continuous conveying of materials.

Expand the use of conveyors. Develop conveyors that can work in high-temperature, low-temperature conditions, corrosive, radioactive, and flammable materials, and can transport hot, explosive, agglomerate, and viscous materials.

Make the structure of the conveyor meet the requirements of the single machine for automatic control of the material handling system. For example, the trolley-type conveyor used by the post office to automatically sort packages should be able to meet the requirements of sorting operations.

Reducing energy consumption to save energy has become an important aspect of scientific research in the field of transportation technology. The energy consumed for transporting 1 kilometer of material for 1 kilometer has been taken as one of the important indicators for conveyor selection.

Reduce dust, noise and exhaust gas generated by various conveyors during operation.

Conveyor classification includes: plate chain conveyor, double speed chain conveyor, roller conveyor, plug-in line, shelf line, drying line, belt conveyor.