SU422811A1 - CLOSED TYPE1 - Google Patents

Description

The invention is intended for use in the pulp and paper industry.

Known nodal closed type, comprising a housing with nozzles, cover, concentrically located outer and inner sieves, bearing unit, hydrodynamic blades and a horizontal channel in the lower part of the body.

The main disadvantage of the known knotter is that it does not provide a sufficiently effective cleaning quality when operating on the waste mass and the three-half half-mass.

The aim of the invention is to eliminate this drawback.

This is achieved by the fact that the outer sieve of the knotter is fixed in the body with the help of a lid, and a vertical hollow cylinder is installed between the internal sieve and the bearing unit body, which has a scanning device in the upper part.

FIG. 1 shows the proposed closed-type knotter, longitudinal section; in fig. 2 is a section along the line A-A in FIG. one; in fig. 3 shows a section but BB in FIG. one.

The proposed knotter consists of Cornus 1, Imi-1, its tangentially disposed pipe 2, a radially disposed pipe 3, and also the pipes 4, 5 and the lid

6, the outer screen 7, the inner screen 8, concentrically located relative to the outer screen 7. rotor 9 with hydrodynamic vanes 10 fixed to it for cleaning the outer screen 7 and hydrodynamic blades 11 for cleaning the internal screen 8, bearing assembly 12, drive 13, a vertical cylinder 14 with a guide vane 15, a cover 16 and a foundation

plates 17.

The outer surface of the screen 7 forms with the inner surface of the housing 1 a vertical annular channel 18, the inner surface of the vertical cylinder 14 forms with the external surface of the bearing assembly 12 a vertical annular channel 19 connected to the vertical annular channel 18 by horizontal channels 20, the outer surface of the rotary cylinder

14 forms with the inner surface (reception) of the sieve 8 all the way. The circular annular channel 21 ends with the receiving pocket 22 and passing into the branch pipe 4. The outer surface of the sieve 8 forms with the inner surface of the sieve 7 a vertical annular channel 23, ending with 1 in the radial nozzle 3. The bottom of the cornus 1 has an opening 25, which transforms into the nozzle 5. The proposed knotter works as follows.

The mass to be cleaned is supplied under pressure into the body 1 through a tangential arrangement located pipe 2. Since the outer sieve 7 is fixed in the body 1 with a lid 6, the mass entering the vertical channel 18 and acquiring a rotational movement can only move downwards. Under the action of the chain-breaking force of inclusion metal contained in the mass, it is pressed against the walls of the housing 1, lowered to the bottom and through the opening 25 enters the pipe 5 and is discharged from the node. Under the action of the pressure differential, part of the mass passes through the openings of the sieves 7 into the vertical annular channel 23, which serves to receive the cleaned mass. Another part of the mass, as well as light sorting waste, obtained on the sieve 7, descending through the annular channel 18, fall through the horizontal channels 20 into the vertical annular channel 19, rise along it to the cover 16 and enter the guiding apparatus 15 made of plates located at an angle to the generatrix of the vertical cylinder 14.

The passage through the guiding device 15, the mass receives a rotational movement again and enters the vertical annular channel 21. Under the effect of the pressure differential, the mass passes through the holes of the sieve 8 into the vertical annular channel 23, mixes with the mass passing through this hole of the sieve 7 into pocket 24 passing into nozzle 3 and discharged from the knotter. Hydrodynamic blades 10 and 11 constantly rotating in the vertical annular channel 23 (in the zone of the cleaned mass) destroy the filtering layers deposited on the corresponding surfaces of sieves 7 and 8, consisting of fine fibers and soils, thereby ensuring the cleaning of sieves 7 and 8. The descending masses in channels 18 and 21 wash the filtering layers destroyed by the hydrodynamic blades 10 and 11 from the corresponding surfaces of screens 7 and 8, thereby providing the necessary throughput of screens 7 and 8. Contaminants contained in the mass (light waste), along with a small amount of good fiber, enters pocket 22 and is discharged from the host through pipe 4.

Thus, in the proposed knotter design, the hydrodynamic blades rotate in the zone of the purified mass and, therefore, the grinding between the hydrodynamic blades and the sieves of contaminants contained in the mass, and their forced pushing into the zone of the purified mass is absent.

Subject invention

A closed tin knotter, comprising a housing with nozzles, a lid, concentrically arranged outer and inner sieves, a bearing unit, hydrodynamic blades and a horizontal channel in the lower part of the hull, characterized in that, in order to improve operational efficiency and improve the quality of cleaning, the outer the sieve is secured in the housing using a lid, and

A vertical hollow cylinder is installed between the inner sieve and the body of the subunit assembly, and there is a scanning device in the upper part.

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