trommel screenIt is a type of machinery widely used in sorting technology, which controls garbage sorting by controlling the particle size and has high sorting accuracy.trommel screenThe cylinder is generally divided into several sections, depending on the specific situation. The sieve holes are arranged from small to large, and the sieve holes on each section have the same aperture.

The drum screen mainly consists of a motor, a reducer, a drum device, a frame, a sealing cover, and an inlet and outlet.

working principle

The drum device is installed obliquely on the frame. The electric motor is connected to the drum device through a coupling via a reducer, driving the drum device to rotate around its axis. After the material enters the drum device, due to the tilt and rotation of the drum device, the material on the screen surface flips and rolls, causing qualified materials (undersized products) to be discharged through the discharge port at the bottom of the rear end of the drum, and unqualified materials (undersized products) to be discharged through the discharge port at the tail end of the drum. Due to the flipping and rolling of materials inside the drum, materials stuck in the sieve holes can be ejected to prevent blockage of the sieve holes. The principle and structure of drum sand screening machine, drum screening machine and drum screen are almost the same, but there are differences in people's understanding and naming of them.

feature

1. The sieve holes are not easily clogged.

2. Smooth operation with low noise.

3. Simple structure and easy maintenance.

4. The screening cylinder can be sealed, making it easy to seal and collect dust.

5. The whole machine has high reliability and requires less one-time investment.

6. Adopting special sieve mesh, with high screening efficiency and long service life.

Scope of Application

1. Used for grading stones of different sizes and separating soil and stone powder in the quarry.

2. Used for sand and stone separation in the sand and stone field.

3. The coal industry is used for the separation of lump coal and coal powder, as well as coal washing (a component of coal washing machinery).

4. The chemical and mineral processing industries are used for the classification of large and small block materials and the separation of powdery substances.

structure

Drum screen is a widely used mechanical device in sorting technology, which controls garbage sorting by adjusting the particle size and has high sorting accuracy. The cylinder of a drum screen is generally divided into several sections, depending on the specific situation. The sieve holes are arranged from small to large, and the sieve holes on each section have the same aperture.

In order to improve the sorting accuracy and avoid the situation where small particles are screened out in large aperture screens, the garbage must undergo sufficient flipping in the drum screen, and the moving speed of the garbage cannot be too fast. Usually, a scraper plate is installed on the inner wall of the drum to lift the garbage particles, so that garbage particles of different sizes have as much chance as possible to contact the sieve holes. If they meet the requirements of the aperture, the particles can pass through the sieve, achieving the purpose of drum screen sorting.

In order to improve screening efficiency, the speed of garbage moving inside the drum screen should not be too fast, otherwise it will cause insufficient screening. Therefore, drum screens generally have strict installation angles, usually 5 °, which can be adjusted as needed in practical situations.

The drum section is connected to the drum screen turntable through nuts and screws, making installation and disassembly of the drum section relatively convenient. Due to the connection between the drum section and the turntable, when the turntable rotates under the drive of the driving device, the drum section also rotates together.

The drum is divided into three sections, each 80cm long and 60cm in diameter, with apertures of 13mm, 50mm, and 200mm respectively. The sieving components in the first paragraph mainly consist of fine particles such as coal ash and soil, as well as small metal particles; The sieving components in the second paragraph mainly include small bricks, stones, some plastics, paper, etc; The sieving components in the third paragraph include paper, plastic, bamboo, rubber, etc. The use of drum screens has created very favorable conditions for subsequent air selection.

From the figure, it can be seen that each section of the drum is fixed to the turntable with nuts and screws, which brings great convenience to the disassembly of the drum. The connection of the drum of the drum screen in this form has certain advantages. If the drum adopts a whole form instead of a segmented form, there will be significant difficulties in processing. Because the entire drum is divided into three sections, with a total length of 2.4m, if holes are drilled on a single steel plate, the weight of the steel plate will be very heavy, and it will be very difficult to roll the plate, let alone install it; If the three sections are processed separately, the weight is much lighter, making it easier to roll and install. Moreover, a more suitable aperture can be selected based on the actual particle size of the garbage, which helps to improve screening efficiency.