How does the excavator rotary screening bucket quickly backfill the pipe?

The excavator rotary screening bucket is a specialized attachment designed to quickly and efficiently backfill pipes. Here's how it works:

1. Attachment: The excavator is equipped with a rotary screening bucket, which is essentially a large cylindrical drum with screens or grids on the sides and bottom. The bucket is usually fitted with rotating blades or paddles inside.

2. Positioning: The excavator positions itself near the trench or pipe to be backfilled. The bucket is positioned above the trench so that the screens face downwards.

3. Material Loading: The excavator operator uses the machine's hydraulic controls to scoop up the backfill material, such as soil or gravel, into the rotary screening bucket. The material is loaded into the open top of the bucket.

4. Rotary Action: Once the bucket is loaded, the excavator operator activates the rotation mechanism. The rotary screening bucket starts rotating, and the blades or paddles inside agitate the material.

5. Screening Process: As the backfill material rotates inside the bucket, the screens or grids on the sides and bottom allow fine particles to fall through while retaining larger debris. This process helps to separate out soil or gravel of the desired size for backfilling.

6. Backfilling: The excavator operator positions the rotating bucket directly above the pipe trench, and the screened backfill material is discharged into the trench. The rotation of the bucket helps to distribute the backfill evenly and effectively around the pipe.

7. Repeat Process: The excavator continues this loading, screening, and backfilling process until the pipe trench is adequately backfilled.

The excavator rotary screening bucket streamlines the backfilling process by efficiently screening the material while allowing for precise placement around the pipe. It saves time and manual labor compared to traditional methods of backfilling.