Scraper conveyor is an important material handling machine, which is mainly used to transport bulk materials in the trough.The following is a detailed introduction to scraper conveyor:

Definition and classification

Scraper conveyor is a conveyor that uses scrapers fixed on traction chains to scrape and transport bulk materials in open troughs According to the layout and structure of its chute, it can be divided into two types: parallel type and overlapping type; According to the number and arrangement of chains, it can be divided into four types: single chain, double-sided chain, double-center chain and triple chain In addition, there are two types of fixed and displaced scraper conveyor, in which the components of the displaced scraper conveyor are easy to disassemble and assemble, convenient to reinstall and use after displacement

Structure and composition

Scraper conveyor is mainly composed of open trough traction chain scraper head driving sprocket and tail tensioning sprocket The traction chain bypasses the head and tail sprockets to form a closed loop. Materials can be transported by upper branch or lower branch or by upper and lower branches at the same time The shape of the scraper of the multi-purpose circular chain of traction chain is trapezoidal rectangle or long strip

Working principle

The working principle of scraper conveyor is that the open chute is used as the bearing part of coal gangue or material, and the scraper is fixed on the chain (forming scraper chain) as the traction component When the head transmission part is started, the sprocket on the head shaft is driven to rotate, so that the scraper chain runs circularly and drives the material to move along the chute until it is unloaded at the head Scraper chain bypasses sprocket wheel for stepless closed cycle operation to complete material conveying

Advantages and disadvantages

Advantages: The structure is solid and can withstand external force such as impact, smashing and pressure of coal gangue or other materials

It can meet the need of uneven bending of coal mining face floor and can bear vertical or horizontal bending

The fuselage is short and easy to install

It can also be used as a track for shearer operation

Reverse operation is convenient for handling bottom chain accidents

Simple structure, feeding or discharging at any point on the conveying length

The airtight casing can prevent dust from flying and polluting when conveying materials

Low cost and flexible use

Disadvantages: No-load power consumption is about 30% of the total power

Not suitable for long-distance transportation

Improper chain dropping and chain jumping accidents are easy to occur

Consumption of steel is high and cost is high

Easily crushed materials have high noise and energy consumption

Scope of application

Scraper conveyor is widely used in coal, chemical industry, electric power, metallurgy, light industry and other industries For example, in the coal industry, scraper conveyor can adapt to different terrain and coal mining technology to transport coal from the working face to the transporter and then transport to the ground through other equipment; In the chemical industry, scraper conveyor can transport all kinds of solid chemical raw materials and products to meet the needs of chemical production

Use and maintenance

The following points should be paid attention to when using scraper conveyor:

Regular cleaning: Remove sundries and dust inside and outside the conveyor, especially the chain roller scraper and side plate at the bottom of the conveyor.

Lubrication maintenance: Regularly lubricate and maintain chain, bearing, gear and other parts to ensure the normal operation of the equipment.

Check the chain tension: Check the chain tension regularly to avoid the chain being too loose or too tight.

Check the status of scraper: regularly check the wear of scraper and replace the scraper with serious wear in time.

Check electrical equipment: Check electrical equipment such as motor cables regularly to ensure safe operation of equipment.

Check the protection device periodically: Check the reliability of safety device including limit switch, emergency stop switch, breaker, etc.