SU1407578A1 - Auger screen-feeder - Google Patents

Abstract

The invention relates to devices for the protection of conveyor belts and the classification of rock mass by fraction and m. used in the mining, construction and metallurgy industries. The purpose of the invention is to increase the efficiency of screening and reduce wear of the screening surface due to the redistribution of the screened material. The screening surface of the feeder screen is formed by screws installed in the supports, some of which are made with reverse winding relative to the other part. The shaft (B) of each screw is made hollow from separate sections (U) 4 and 5 arranged with opposite winding, placed on each additional B 6 installed in the supports, and equipped with an additional drive interacting with gear B 6. At the same time U 4 is fixed on In 6, it is rigid, and Y 5 is coupled to a rotational drive and mounted rotatably in the opposite direction relative to Y 4. The starting material is mixed along Y 5 of the screw, thus turning and turning the fine fraction onto the conveyor belt. The large pieces under the action of the pressure of the turns of the rotating 4 screws move to the discharge end of the device and unload into the center of the conveyor belt. 2 Il. (Oh (L

Description

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The invention relates to devices for the protection of conveyor belts and the classification of rock mass by fractions, namely, feeder screens, and can be used in the mining, construction and metallurgical industries.

The purpose of the invention is to increase the efficiency of screening and reduce wear of the screening surface due to the redistribution of the screened material.

FIG. 1 shows the screen feeder; in fig. 2 shows section A-A in FIG. one.

The screen feeder includes a screening surface formed by the screws installed in the supports 1, part 2 of which is made with reverse winding relative to the other part 3. The shaft of each screw is made hollow from separate sections 4 and 5 and placed on each additional shaft 6 installed in the supports 7 and 8 by means of bearings 9 and 10 and is equipped with an additional drive, which interacts with the gear of the additional shaft, one of the sections 4 of the hollow shaft is fixed | on the additional shaft rigidly, and the other | section 5 - by means of bearings 11 and 12 gears 13, which are connected with a rotating drive with the possibility of turning in the opposite direction with respect to section 4. Sections 4 and 5 are made with opposite winding.

Screen feeder works as follows

way

The torque from the engine through gear 13 is transmitted to sections 5 of augers, which begin to rotate left and right t the longitudinal axis of the device, and through gears 13 and shafts 6 - sections 4 augers that begin to rotate in the direction from sides 14 to the longitudinal axis of the device (shown by arrows in Fig. 1).

The source material is fed to the screener and under the action of the resultant DT force of the turns and friction forces between the material and the surface of the rotating sections 5 of the screws (the direction of which is perpendicular to one another) moves simultaneously to the discharge end of the device and to the beads 14, while ensuring agitating the material and dropping the fine fraction into the sub-mesh space of 6 ° on the conveyor belt. Further, large pieces of (material), approach to the sides 14, coming in (from coming into contact with sections 4 of augers rotating in the opposite direction with respect to the direction of rotation of sections 5 of the screws)

side (ie, in the direction from the sides 14 to the central longitudinal axis of the device). The turns of the 4 screw sections have a reverse winding relative to the winding of the turns of the screw sections 5, therefore changing the opposite direction of rotation of the screw sections 4 relative to the direction of turning of the screw sections 5 does not affect the direction of movement of the material along the longitudinal axis of the feeder screen (large pieces of material are still , under the action of the pressure force of the turns of the rotating sections of the 4 augers, move along the longitudinal axis to the discharge end of the device), only the direction of action of the friction force changes — from board 14 to the central longitudinal axis of the screening-feeder. As a result of this, under the action of the resultant from the indicated forces, large pieces of material are displaced from the edges of the screen feeder to its central part and, consequently, are unloaded into the center of the conveyor belt.

Due to the rotation in opposite directions of sections 4 and 5 of the screws, which have turns with reverse winding one relative to the other, the trajectory of movement of materials changes, due to which the path and time of its stay on the screening surface, and hence the efficiency of screening, increase the material it is evenly distributed over the working brush, which reduces its wear and increases the efficiency of screening.

Claims (1)

Invention Formula The screw screen feeder includes 5 screenings formed by the screws installed in the supports, some of which are made with reverse winding relative to another part, which drives the screws to rotate, in order to increase the screening efficiency and reduce the wear of the screening surface the expense of redistributing the screened material, the screen is equipped with additional drive and shafts installed in the supports and connected with the drive of rotation. and the shaft of each screw is hollow of separate sections placed on each additional shaft, one of which is fixed on the latter rigidly, and the other section is installed with the possibility of rotation in the opposite direction relative to this section and is connected with a rotation drive, and the sections of the screw have opposite winding. five / J // CPU2.1