SU1215760A1 - Trommel screen - Google Patents

Description

The invention relates to a technique for classifying crushed materials by size and can be used in the regeneration industry, the building materials industry, writing, chemical, etc.

The aim of the invention is to reduce the time required to replace the sieve and increase the uniformity of its tension.

FIG. 1 shows a screen, a longitudinal section along the axis; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 — node I in FIG. one; in fig. 5 - inner drum without sieve.

The screen consists of inner 1 and outer 2 drums mounted in housing 3.

The cylindrical inner drum 1 has a bottom 4, facing the vrs, of the feeding inlet 5, which is a screening surface. The flange 6 of the drum 1 (Fig. 5) is connected to the flange 7 of the nozzle 5 by ribs 8 and the flange 9 of the unloading nozzle 10 by stubs 11 arranged in a diameter smaller than the diameter of the sieve.

On the flange 6 of the drum 1, the hinge brackets 12 are pivotally fixed, resting on an annular conical cam 13 fixed with the possibility of longitudinal movement relative to the flange, 6 with screws 14 and nuts 15.

On the flange 9 are hinged rotor brackets 16 having levers 17. Brackets 12 and 16 (Fig. 2) are supported by ropes 18, one ends of which are fixedly mounted on the flange 6, and screws 19, which enter the holes, are fixed to the second ends. 20 in flange 9.

The sieve 22 of the drum 1 (Fig. 1) is made in the form of a cylinder and its edges are fixed on the rings 23 and 24. In the ring 23, the screws 25 fixed to the flange 9 having nuts 27 are fixed to the holes 26 (Fig. 5).

On the ring 24, the screws 28 (Fig. 4) are rotatably fastened and screwed into the threaded holes 29 (Fig. 5) in the flange 6.

The inner drum 1 supports rollers 30 mounted on the rollers 31.

The outer drum 2 (Fig. 1) consists of flanges 32 and 33, planted on nozzles 5 and 10 on bearings 34 and 35. Flanges 32 and 33 are rigidly connected by straps 36 arranged in a diameter smaller than sieve diameter 37.

The sieve 37 and the device for tensioning the sieve of the outer drum are structurally similar to sieve and the device for tensioning the sieve of the inner drum.

five

0

Q 5

0

0

five

Drums 1 and 2 are driven by gears 38 and 39.

The housing 3 is provided with a nozzle 40 for removing the finished product and a nozzle 41 for removing the coarse fraction.

The discharge nozzle 10 and the nozzle 40 are connected to a discharge source (not shown).

The tension of the strainer on the inner drum is carried out as follows.

When sieve 22 is removed and the annular conical cam 13 (Fig. 5) is shifted to the left, the ropes 18 are weakened and do not prevent the sieve from being put on.

A sieve 22 is put on the drum 1 from the side of the flange 6, screws 28 are screwed into the holes 29 of the flange 6, screws 25 are inserted into the holes 26 of the flange 9. As the nuts 15 are tightened, the cam 13 moves to the right, simultaneously turning all the brackets 12.

When tightening the nuts 27, the ring 23 of the sieve 22, moving to the left and acting on the levers 17 of the brackets 16, turns them. At the same time, the ropes 18, tightening and moving in the radial direction, pull the sieve in the transverse direction. The diameter of the ropes 18 can be pre-adjusted according to the diameter of the sieve by changing their lengths with the help of nuts 21 and screws 19. Screw the screws 28 and pull longitudinal strainer.

For s.meny sieve 22, unscrew the nuts 15 and 27 and screws 28, remove the worn sieve and pull the spare sieve in the sequence described.

The number of nuts 15 and 27 and screws 28 can be taken no more than 4 pieces each. A total of 12 connections are required when replacing the screens. In the same sequence, the strainer is applied to the outer drum 2.

Drum rumble works as follows.

The source material is pneumatically fed to the discharge nozzle 5, from where it is poured onto the inner surface of the outer sieve between the ribs 8, and a part of it is sifted through the screening surface of the bottom 4 into the inner drum 1 and removed through the discharge nozzle 10. (the system for creating a suspended layer is not shown), as a result of which a thin fraction of the material is sifted through a sieve into the drum 1 and is sucked through the nozzle 10, as well as through an external sieve of the drum and is removed through the pipe 40. The coarse fraction is removed through conduit 1 April.

Bb

Fi. 2

yd J

2nd

21

FIG. five

FIG.

12

J 5

13

Compiled by L. Yaroshchuk

Editor A. VorovichTechred I. VeresKorrektor O.

Order 928/7 Circulation 566 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (3)

1. Drum screen, including a cylindrical screen _x formed by a screening surface placed between the flanges, a device for tensioning the sieve with supporting elements, characterized in that, in order to facilitate installation and dismantling of the sieve and increase the uniformity of its tension, the device for tensioning the sieve contains a movable relative to ring flanges, swivel brackets in contact with the ring, and an annular conical cam mounted to interact with the bracket, and to The conical ring cam is mounted on one of the flanges of the drum with the possibility of longitudinal movement, and the cylindrical sieve is fixed in the ring, while the supporting elements are made in the form of ropes, some ends of which are equipped with screws and nuts passed through the flanges, and the others are fixedly mounted on the flange. 2. Rumble on π. 1, characterized in that the rings have fasteners. 3. Rumble on PP. 1 and 2, characterized _in that it is provided with at least one-! S them coaxially disposed relative to the cylindrical sieve a further sieve. SU., „1215760 12! 5760