CN214459174U

CN214459174U - Light slag re-screening structure of pressure screen

Info

Publication number: CN214459174U
Application number: CN202023148327.3U
Authority: CN
Inventors: 许银川; 郭克俭; 许银嵩; 许超峰; 许要锋
Original assignee: Zhengzhou Yunda Paper Equipment Co Ltd
Current assignee: Zhengzhou Yunda Paper Equipment Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-10-22
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a pressure screen light slag re-screening structure, which comprises an upper cover and a rotor, wherein the upper cover is provided with a light slag outlet, the rotor is provided with a light slag channel, a re-screening mechanism is detachably arranged in the upper cover and comprises a screen plate and a rotary wing plate, the screen plate is provided with a light slag output channel, and a re-screening gap is formed between the rotary wing plate and the screen plate; the inner wall of the sieve plate and the upper end surface of the rotor form a light slag re-screening cavity, and the light slag re-screening cavity is communicated with the light slag channel; the light slag enters the light slag re-screening cavity from the light slag channel and is loosened by the rotary wing pieces, fibers in the slurry enter the middle screening area through the screen plate, the light slag is discharged from the light slag outlet, the light slag is screened for the second time through the screen plate and the rotary wing pieces, the content of the fibers in the light slag is reduced, the fiber loss rate is reduced, in addition, in the screening process, the light slag rotating at high speed from the outside acts on the screen plate and the rotary wing pieces, the upper cover is not contacted, and the abrasion to the upper cover is reduced.

Description

Light slag re-screening structure of pressure screen

Technical Field

The utility model belongs to the pressurized screen screening field, concretely relates to pressurized screen light sediment riddle structure.

Background

The pressure screen is used as the most extensive screening equipment in the pulping line of the domestic paper making industry, the technology of the pressure screen is mature day by day, domestic manufacturers also introduce from the beginning technology and gradually transit to technical innovation, and the pressure screen is adjusted from all aspects to be more suitable for domestic paper making enterprises.

When the traditional pressure screen is used for screening slurry, the rotor and the screen cylinder in the middle are responsible for screening the slurry, the proper slurry enters a good slurry area, heavy slag is discharged from a lower slag discharge pipe, and light slag is discharged from an upper light slag discharge pipe. The light residue after one-time screening in the middle screening area contains a large amount of fibers, which causes a large amount of fiber loss. And the light slag has light specific gravity and large volume, is easy to be accumulated in a large amount near the upper cover and rotates at high speed along with the slurry flow, so that the upper cover is seriously abraded.

SUMMERY OF THE UTILITY MODEL

To the deficiencies described in the prior art, the utility model provides a light sediment riddle structure of pressure screen.

The utility model discloses the technical scheme who adopts does:

a pressure screen light slag re-screening structure comprises an upper cover and a rotor, wherein the upper cover is provided with a light slag outlet, the rotor is provided with a light slag channel, a re-screening mechanism is detachably arranged in the upper cover and comprises a screen plate and rotary wing pieces, the lower part of the screen plate is opposite to the outer cylinder wall of the rotor, the upper part of the screen plate is detachably connected with the inner wall of the upper cover, the screen plate is provided with a light slag output channel, and the light slag output channel is communicated with the light slag outlet; the rotary wing pieces are arranged below the sieve plate in parallel, are arranged on the rotating end face of the rotor and rotate along with the rotor; a re-screening gap is formed between the rotary wing panel and the sieve plate, and the width of the re-screening gap is 1-3 mm; a light slag re-screening cavity is formed between the inner wall of the sieve plate and the upper end surface of the rotor and is communicated with the light slag channel; the outer wall of the sieve plate and the inner wall of the upper cover form a re-sieving channel which is communicated with the middle sieving area; the middle screening area is formed between the outer side wall of the rotor and the screen cylinder.

As a preferred scheme of the utility model, be equipped with between the outer tube wall of sieve and rotor and move seal structure, move seal structure can be fine assurance can't directly get into middle part screening district without the light sediment of screening.

As a preferred scheme of the utility model, the sieve is the toper sieve, and the sieve passes through mounting bracket demountable installation at the upper cover inner wall, and the mounting bracket is equipped with light sediment output channel I, and light sediment output channel I communicates with each other with light sediment output channel, and mounting bracket outer wall, sieve outer wall and upper cover inner wall form the double screen passageway.

As a preferred scheme of the utility model, in order to ensure that the sieve installation is firm, the lower part of sieve is connected at the upper cover inner wall through a plurality of stiffeners.

As an optimal scheme of the utility model, be equipped with the dilution water passageway on the rotor, the dilution water passageway communicates with each other with light sediment re-sieve chamber, and the dilution water that the dilution water passageway got into can further dilute light sediment, prevents that light sediment from gathering, reduces the fibre loss rate.

The utility model discloses set up the detachable toper sieve at the upper cover inner wall, there are a plurality of equipartition rotor vanes to install on the rotor below the sieve, rotor vane is rotary motion and sieve formation riddling passageway along with the rotor, light sediment gets into the light sediment riddling intracavity from the light sediment passageway, under rotor vane's rotation effect, the light sediment of conglobation is dredged out, the qualified fibre of parcel in the light sediment conglobation is appeared, distribute in the thick liquid, because rotor vane high-speed rotation and sieve between form positive, negative pulse, the fibre in the thick liquid gets into riddling passageway and then gets into middle part screening district through the sieve under positive pulse effect, negative pulse inhales the water on sieve upper portion into the sieve lower part, play the effect of washing sieve mesh, prevent the sieve mesh jam, light sediment after the screening is discharged from the light sediment export, carry out secondary screening to light sediment through sieve and rotor vane, reduce the fibrous content in the light sediment, fibrous loss rate has been reduced, and in the screening process, the light slag rotating at high speed from the outside acts on the sieve plate and the rotor blade without contacting the upper cover, so that the abrasion to the upper cover is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

Example 1:

the utility model provides a pressure sieve light sediment riddle structure, as shown in figure 1, includes rotor 1 and upper cover 2, and upper cover 2 is equipped with light sediment export 3, is equipped with light sediment passageway 11 on the rotor 1, can dismantle in upper cover 2 and be equipped with riddle mechanism, riddle mechanism includes sieve 4 and rotor plate 5, sieve 4 is the toper sieve, and sieve 4 lower part is relative with rotor 1 urceolus wall and be equipped with between the urceolus wall of sieve 4 and rotor 1 and move seal structure 10, moves seal structure can be fine assurance light sediment that does not screen and can't directly get into middle part screening district 9.

And in order to ensure the stability of the connection of the sieve plates, the lower part of the sieve plate 4 is connected with the inner wall of the upper cover 2 through a plurality of reinforcing rods 14.

The upper portion of sieve 4 is through mounting bracket 12 demountable installation at the upper cover 2 inner wall, sieve 4 is equipped with light sediment output channel 6, and light sediment output channel 6 communicates with each other with light sediment export 3, and mounting bracket 12 is equipped with light sediment output channel I13, and light sediment output channel I13 communicates with each other with light sediment output channel 6, and mounting bracket 12 outer wall, sieve 4 outer wall and upper cover 2 inner wall form double screen passageway 8, and double screen passageway 8 communicates with each other with middle part screening district 9.

The rotary wing pieces 5 are arranged below the sieve plate 4 in parallel, are arranged on the rotary end face of the rotor and rotate along with the rotor 1; a re-screening gap is formed between the rotary wing panel 5 and the screen plate 4, and the width of the re-screening gap is 1-3 mm; a light slag re-screening cavity 7 is formed between the inner wall of the sieve plate 4 and the upper end surface of the rotor 1, and the light slag re-screening cavity 7 is communicated with the light slag channel 11.

In order to better prevent the light slag from aggregating, a dilution water channel 15 is arranged on the rotor 1, the dilution water channel 15 is communicated with the light slag re-screening cavity 7, and dilution water entering from the dilution water channel can further dilute the light slag, so that the light slag is prevented from aggregating, and the fiber loss rate is reduced.

The light slag rises into the light slag re-screening cavity 7 from the light slag channel 11 of the rotor 1, the agglomerated light slag is loosened under the action of the rotating rotary wing pieces 5, and qualified fibers wrapped in the light slag agglomerates are separated out and distributed in the slurry. The rotor blades 5 rotate at a high speed to form positive and negative pulses between the sieve plates 4, fibers in the slurry enter the middle screening area 9 through the sieve plates 4 under the action of the positive pulses, water on the upper portions of the sieve plates 4 is sucked into the lower portions of the sieve plates by the negative pulses to play a role in cleaning sieve pores, the sieve pores are prevented from being blocked, and screened light slag is discharged from the light slag outlet 3. The dilution water entering from the dilution water channel 15 of the rotor 1 can further dilute the light slag, prevent the light slag from aggregating and reduce the fiber flow rate. In the screening process, the light slag rotating at high speed from the outside acts on the sieve plate 4 and the rotary wing pieces 5 without contacting the upper cover 2, so that the abrasion to the upper cover 2 is reduced.

Example 2:

a pressure screen light slag re-screening structure comprises an upper cover and a rotor, wherein the upper cover is provided with a light slag outlet, the rotor is provided with a light slag channel, a re-screening mechanism is detachably arranged in the upper cover and comprises a screen plate and rotary wing pieces, the lower part of the screen plate is opposite to the outer cylinder wall of the rotor, the upper part of the screen plate is detachably connected with the inner wall of the upper cover, the screen plate is provided with a light slag output channel, and the light slag output channel is communicated with the light slag outlet; the rotary wing pieces are arranged below the sieve plate in parallel, are arranged on the rotating end face of the rotor and rotate along with the rotor; a re-screening gap is formed between the rotary wing panel and the sieve plate, and the width of the re-screening gap is 1-3 mm; a light slag re-screening cavity is formed between the inner wall of the sieve plate and the upper end surface of the rotor and is communicated with the light slag channel; the outer wall of the sieve plate and the inner wall of the upper cover form a re-screening channel which is communicated with the middle screening area.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a pressure screen light sediment riddle structure, includes rotor (1) and upper cover (2), and upper cover (2) are equipped with light sediment export (3), are equipped with light sediment passageway (11), its characterized in that on rotor (1): a re-screening mechanism is detachably arranged in the upper cover (2), the re-screening mechanism comprises a screen plate (4) and rotary wing pieces (5), the lower part of the screen plate (4) is opposite to the outer cylinder wall of the rotor (1), the upper part of the screen plate (4) is detachably connected with the inner wall of the upper cover (2), the screen plate (4) is provided with a light slag output channel (6), and the light slag output channel (6) is communicated with the light slag outlet (3); the rotary wing pieces (5) are positioned below the sieve plate (4), are arranged on the rotary end surface of the rotor and rotate along with the rotor (1); a re-screening gap is formed between the rotary wing panel (5) and the sieve plate (4); a light slag re-screening cavity (7) is formed between the inner wall of the sieve plate (4) and the upper end surface of the rotor (1), and the light slag re-screening cavity (7) is communicated with the light slag channel (11); the outer wall of the sieve plate (4) and the inner wall of the upper cover (2) form a re-sieving channel (8).

2. The pressure screen light slag rescreening structure of claim 1, wherein: the sieve plate (4) is parallel to the rotary wing pieces (5), and the width of the re-screening gap is 1-3 mm.

3. The pressure screen light slag rescreening structure of claim 1 or 2, characterized in that: a dynamic sealing structure (10) is arranged between the sieve plate (4) and the outer cylinder wall of the rotor (1).

4. The pressure screen light slag rescreening structure of claim 1 or 2, characterized in that: the sieve plate (4) is a conical sieve plate.

5. The pressure screen light slag rescreening structure of claim 4, wherein: the sieve plate (4) is detachably mounted on the inner wall of the upper cover (2) through a mounting rack (12), the mounting rack (12) is provided with a light slag output channel I (13), the light slag output channel I (13) is communicated with the light slag output channel (6), and the outer wall of the mounting rack (12), the outer wall of the sieve plate (4) and the inner wall of the upper cover (2) form a re-sieving channel (8).

6. The pressure screen light slag rescreening structure of claim 5, wherein: the lower part of the sieve plate (4) is connected with the inner wall of the upper cover (2) through a plurality of reinforcing rods (14).

7. The pressure screen light slag rescreening structure of claim 5, wherein: a dilution water channel (15) is arranged on the rotor (1), and the dilution water channel (15) is communicated with the light slag re-screening cavity (7).