Bucket Elevator

A bucket elevator is a machine that continuously conveys materials vertically using buckets rigidly attached to a traction element. Widely used in industries such as mining, metallurgy, coal, electric power, port operations, chemicals, building materials, grain, and fertilizers, it is a core piece of equipment for vertical material transport in industrial production.

Structural composition of the equipment

A bucket elevator primarily consists of traction elements (rubber belts or chains), buckets, a drive unit, head and tail pulleys (or sprockets), a tensioning device, and a casing. The complete machine comprises an upper housing, a drive unit, intermediate casing sections, an inspection door, an inlet, and an outlet. The drive unit is located at the top of the elevator. The entire assembly forms an enclosed structure within the external casing.

Application scope of the equipment

Bucket elevators are widely used for the vertical transport of materials in the production of compound, organic, bio-, and controlled-release fertilizers, as well as in industries such as mining, metallurgy, coal, electric power, port operations, chemicals, building materials, and grain handling.

Types of usable raw materials

Bucket elevators are suitable for conveying powdery, granular, and small-lump materials that are non-abrasive or mildly abrasive, such as fertilizers, grain, cereals, coal, cement, crushed stone, sand, clay, and ore.

Equipment operating instructions

(I) Pre-start Preparation: Conduct a comprehensive inspection before operation. Verify that all fastening bolts and assembly bolts are secure and not loose or detached. Check the interior of the bucket elevator for foreign objects, material buildup, or accumulated water. Confirm that lubrication levels meet requirements. Ensure the anti-reverse device is intact. Verify that the material to be conveyed matches equipment specifications. Ensure safety guards are in good condition. Perform a manual rotation (inching) check; proceed to a trial run only if no abnormalities are detected.

(II) Startup Sequence: Start the discharge equipment first, then the bucket elevator. The elevator must be started under no-load conditions. Once the elevator is running stably without a load, slowly open the feed gate and gradually increase the feed rate. Strictly adhere to the principle of "start without load, stop without load." Material feeding must not precede startup, and the feed rate must not exceed the elevator's lifting capacity.

(III) Operational Monitoring: Ensure uniform feeding during operation to avoid overloading. Observe the elevator for any swaying or impact. Monitor lubrication and temperature rise across all equipment components. Do not open the head casing or remove the base slide plate during normal operation. Do not open manholes or inspection ports while the machine is running. During prolonged operation, the temperature rise of bearings must not exceed 35°C.

(IV) Shutdown Procedure: Stop feeding first. Once all material has cleared, press the elevator stop button and cut off the power. The elevator must be completely emptied of material before stopping; ensure all buckets are cleared of material prior to shutdown. Starting or stopping under load is strictly prohibited. Do not reverse the machine, as reversal may cause the chain to derail.

(V) Emergency Shutdown: Perform an emergency shutdown if the bearing temperature rise exceeds 35°C or the gearbox oil temperature exceeds 90°C. Initiate an emergency shutdown in the event of malfunctions such as chain slippage or bucket detachment. Perform an emergency shutdown in the event of major equipment failure or operational accidents.

Solutions to Equipment Problems

Hopper belt slippage: Stop the machine immediately and adjust the tensioning device to tighten the belt; reduce the feed rate and ensure uniform feeding; apply adhesive to the head pulley and the inner surface of the belt to increase friction; clean, lubricate, or replace the bearings.

Hopper belt misalignment: Stop the machine immediately to troubleshoot; correct the belt joint; adjust the parallelism and perpendicularity of the head and tail pulleys; repair or replace the head and tail pulleys; replace the worn-out hopper belt.

Excessive material fallback: Appropriately reduce the hopper speed; adjust the position of the discharge chute/deflector plate; keep the feed rate within the rated range.

Hopper detachment: Stop the machine promptly for inspection; adjust the position of the feed inlet; select hoppers made of high-strength material; clear accumulated material from the machine base before startup.

Application of the equipment in the production line

Bucket elevators perform the critical task of vertically lifting materials across various production lines. In organic fertilizer production lines, they lift fermented and decomposed material from a lower level to a higher one for subsequent processing. In compound fertilizer production lines, they are responsible for the vertical transfer of materials between different floors.