CN216809363U - Screen basket and pressure screen - Google Patents

Abstract

The application provides a sieve basket and pressure sieve, the sieve basket includes: the screen bar comprises a plurality of screen bars, a plurality of gear rings and a plurality of support rings, wherein a plurality of first tooth grooves are distributed on the inner side of each gear ring in the axial direction, and the screen bars are meshed in the first tooth grooves to form a cylinder shape; each support ring is provided with a second groove along the inner side circumference, and the outer side of each gear ring is clamped in the second groove. The technical scheme of this application has realized that screen basket simple structure is firm, and it is effectual to go out thick liquid, and has energy-conserving, with low costs, longe-lived advantage.

Description

Screen basket and pressure screen

Technical Field

The application relates to the technical field of papermaking, in particular to a screen basket and a pressure screen.

Background

At present, one of key components in screening equipment, namely a pressure screen basket, is divided into an outward flow type and an inward flow type, most of manufacturers select a seam milling screen basket, generally select a stainless steel plate with the thickness of 5-10 mm, and perform milling processing, and the pressure screen basket has the defects of high cost, low efficiency, low aperture ratio, easy trace leaving on seam surfaces and easy slurry hanging, and the other one is a welding type bar screen which is in a flat plate form during welding, is welded with bars and then is rolled, and has the defects of poor strength, easy deformation, easy breakage and difficult control of seams.

The statements in this background section merely disclose technology known to the inventors and do not, of course, represent prior art in the art.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a sieve basket and pressure sieve, has solved sieve basket structural strength, has gone out thick liquid effect poor, the high and short-lived problem of manufacturing cost.

According to an aspect of the present application, there is provided a screen basket comprising: the screen bar comprises a plurality of screen bars, a plurality of gear rings and a plurality of support rings, wherein a plurality of first tooth grooves are distributed on the inner side of each gear ring in the axial direction, and the screen bars are meshed in the first tooth grooves to form a cylinder shape; each support ring is provided with a second groove along the inner side circumference, and the outer side of each gear ring is clamped in the second groove.

According to some embodiments, the screen basket further comprises: and the upper flange and the lower flange are respectively arranged at the opening ends of the two sides of the screen basket.

According to some embodiments, any two adjacent screen bars of the plurality of screen bars have a first gap therebetween, and the distance of the first gap is in the range of 0.05mm to 1 mm.

According to some embodiments, the screen bars are provided with first limiting parts, and the first tooth grooves of the gear ring are internally provided with second limiting parts matched with the first limiting parts.

According to some embodiments, the first position limiting portion comprises a blind hole.

According to some embodiments, the second limiting part comprises a boss which is matched with the blind hole.

According to some embodiments, the plurality of screen bars are welded within the plurality of first tooth slots.

According to some embodiments, a distance between any adjacent two of the plurality of ring gears is 20mm to 60 mm.

According to some embodiments, the second groove of the support ring and the gear ring are in interference fit.

According to an aspect of the application, a pressure screen is proposed, comprising a screen basket as described above and a rotor arranged inside the screen basket.

Based on foretell sieve basket and pressurized screen, the sieve basket simple structure of this application is firm, and it is effectual to go out thick liquid, has advantages such as energy-conservation, with low costs, long-life, especially in the industry of making that constantly develops, and its economic benefits is very considerable. The fixed connection of ring gear and grating can realize that the distance between the grating is the same, through lock ring interference fit on the ring gear, can greatly increased sieve basket intensity, satisfies all thick liquid pair grating intensity demands.

For a better understanding of the nature and technical content of the present application, reference should be made to the following detailed description and accompanying drawings, which are provided to illustrate the present application and are not intended to limit the scope of the present application in any way.

Drawings

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The accompanying drawings, which are incorporated herein and constitute part of this disclosure, serve to provide a further understanding of the disclosure. The exemplary embodiments of the present disclosure and their description are provided to explain the present disclosure and not to limit the present disclosure. In the drawings:

fig. 1 shows a perspective view of a screen basket according to an exemplary embodiment of the present application.

Fig. 2 shows a partial structural schematic view of a screen basket according to an exemplary embodiment of the present application.

Fig. 3 shows a schematic cross-sectional structure of a screen basket according to an exemplary embodiment of the present application.

Fig. 4 is a schematic sectional view showing a connection relationship of the screen bars, the ring gear, and the support rings according to an exemplary embodiment of the present application.

Fig. 5 shows a partial structural schematic diagram of a ring gear according to an example embodiment of the present application.

Fig. 6 shows a schematic cross-sectional structure of a support ring according to an exemplary embodiment of the present application.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the paper industry, screening and cleaning equipment is used to minimize the amount of impurities in the pulp suspension that do not meet the process requirements, so that clean and good pulp can be obtained and sent directly to the next process. The screening equipment is mainly a pressure screen, and the main functional components of the screening equipment consist of a screen basket and a rotor. The screen basket comprises upper and lower flange, stick fixed muscle, reinforcing ring, and a plurality of sticks are along circumferencial direction align to grid in proper order, form the screen cut between stick and the stick, and when thick liquids through the extrusion of high-speed rotatory rotor leading edge, most good thick liquids can pass the screen cut, flow the good thick liquids export along the screen basket lateral flow. And the intercepted coarse slag moves downwards along with partial good slurry in the screen basket and is discharged from a slag discharge port. In the screening process, especially in the case of very low pulp beating and very hydrophobic pulp, the pulp and coarse residue concentration remaining in the screen basket will increase very quickly and sufficient water needs to be injected from the dilution water inlet in order to maintain the proper operation of the screening process.

The pulp prepared from the pulping workshop contains various impurities such as fiber bundles, sand grains and even metal chips, and the quality of paper is affected if the pulp is directly fed into a paper machine, so the pulp needs to be purified and screened before entering the paper machine, and the pressure screen is produced in view of the characteristic that fibers in the paper-making pulp are easy to agglomerate under the static effect.

The pressure screen comprises a shell, a screen cylinder arranged in the shell, a rotor with a rotary wing, a transmission device for providing power for the rotor and related electric parts, wherein slurry enters the pressure screen along the tangential direction at a certain pressure, and because a certain pressure difference is kept between the inside and the outside of the screen cylinder, when the rotary wing rotates, the gap between the rotary wing and the inner wall of the screen cylinder changes continuously, namely the gap gradually shrinks and then becomes larger gradually, so that a slurry pushing surface for pushing the slurry to the screen cylinder is formed at the front part of the rotary wing between the rotary wing and the screen cylinder, a slurry sucking surface for sucking back the good slurry is formed at the rear part of the rotary wing, and the self-cleaning effect is achieved in the back suction process of the good slurry, so that the smoothness of screen holes is kept, the process is repeated, and the slurry residue finally falls into the lower part and is discharged through a slurry residue valve.

The pressure screen is the important equipment of papermaking trade, wherein the screen cylinder is the key part, also is the vulnerable part simultaneously, traditional stick screen cylinder screen gap is linear arrangement, in the screening process when paper pulp advances down, when impurity (sediment) go up out, because of the screen gap with rotated the second drive be spiral lift paper pulp orientation inconsistent, make the sediment resistance increase, paper pulp is easy to lose water, the concentration increases, it makes production efficiency reduce to block up the screen gap easily, the energy consumption increases, easily seal screen gap (seal the jar) by a large scale when serious and press the rising in the result, the stick drum is destroyed.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustrating and explaining the present invention and are not intended to limit the present application.

Fig. 1 shows a perspective view of a screen basket according to an exemplary embodiment of the present application. Fig. 2 shows a partial structural schematic view of a screen basket according to an exemplary embodiment of the present application. Fig. 3 shows a schematic cross-sectional structure of a screen basket according to an exemplary embodiment of the present application. Fig. 4 is a schematic sectional view showing a connection relationship of the screen bars, the ring gear, and the support rings according to an exemplary embodiment of the present application. Fig. 5 shows a partial structural schematic diagram of a ring gear according to an example embodiment of the present application. Fig. 6 shows a schematic cross-sectional structure of a support ring according to an exemplary embodiment of the present application.

As shown in fig. 1 to 5, according to an exemplary embodiment of the present application, the present application discloses a screen basket 10, which includes a plurality of screen bars 100, a plurality of ring gears 102 and a plurality of support rings 104, wherein an inner side of each ring gear 102 is distributed in a plurality of first tooth grooves 1021 in an axial direction, and the plurality of screen bars 100 are engaged in the plurality of first tooth grooves 1021 to form a cylindrical shape; each support ring 104 has a second groove along the inner circumference, and the outer side of each gear ring 102 is clamped in the second groove. The number of the plurality of screen bars 100, the plurality of gear rings 102 and the plurality of support rings 104 may be set according to the actual strength requirement of the screen basket, and the present application is not limited specifically.

A plurality of screen bars 100 are uniformly distributed along the axial direction of the gear ring 102, the screen bars 100 have the same first gap therebetween, and a plurality of layers of gear rings 102 are uniformly distributed along the length direction of the screen bars 100, so that a cylindrical screen basket 10 is formed, and pulp meeting production requirements is extruded from the screen gaps through the first gaps, namely the screen gaps, between the screen bars 100.

According to the embodiment of the application, a first gap is formed between any two adjacent screen bars 100 in the plurality of screen bars 100, and the distance range of the first gap is 0.05 mm-1 mm. Different pulps can be extracted according to the distance of different screen slots. In the process of extracting paper pulp, a plurality of screen baskets 10 can be continuously arranged, the paper pulp firstly passes through the screen basket 10 with the largest screen slot, the rest paper pulp passes through the screen basket 10 with the screen slot smaller than that of the former paper pulp to extract the paper pulp meeting different requirements, and the extraction steps are carried out by analogy, and are not repeated herein.

According to the embodiment of the present application, when the screen bars 100 need to be provided with a plurality of toothed rings 102 in the length direction thereof, in order to achieve consistency of the end portions of the plurality of screen bars 100, the screen bar 100 of the present application has a first limiting portion, and a second limiting portion matched with the first limiting portion is provided in the first toothed groove 1021 of the toothed ring 102, so as to achieve consistency of the end portions of the plurality of screen bars 100.

The positions of the plurality of screen bars 100 in the axial direction of the ring gear 102 are determined by the first tooth grooves 1021, that is, the distance between two adjacent screen bars 100 is determined. Also, the positions of the plurality of toothed rings 102 in the longitudinal direction of the screen band 100 are determined by the first and second position-limiting portions cooperating with each other.

According to the embodiment of the present application, the screen bars 100 are pre-installed in the first tooth grooves 1021 of the gear ring 102, and then are completely fixed by welding, riveting, mechanical locking, and the like. After the complete fastening, foreign matter on the outside of the ring gear 102 is removed for mounting the support ring 104.

According to the embodiment of the application, the first limiting part comprises a blind hole. The second limiting part comprises a boss matched with the blind hole. Through the boss matching and the blind hole, the position of the screen bar 100 in the axial direction of the gear ring 102 can be determined, so that the screen slot can be determined more accurately. Certainly, the boss can also be adopted to first spacing portion, and the blind hole cooperation in the boss can be adopted to the spacing portion of second, and this application does not do specifically injectd, and everybody can reach the effect the same with this application.

According to the embodiment of the application, the distance between any two adjacent gear rings in the plurality of gear rings 102 is 20mm to 60mm, so that the strength of the screen basket 10 is increased.

Referring to fig. 4 and 6, according to the embodiment of the present application, since the screen bars 100 are fixed by the ring gear 102, for example, the maximum thickness of the ring gear is 6mm, the strength of the formed cylindrical screen basket 10 does not meet the industrial requirement, and the screen basket 10 is often broken. The support ring 104 is provided on the outer side of the ring gear 102 in the present application to increase the strength of the screen basket 10 to meet the requirements of production. The second groove of the support ring 104 is in interference fit with the gear ring 102. By interference fitting the support ring 104 to the ring gear 102, the strength of the screen basket 10 can be greatly increased, and the strength requirements of all the screen wires on the screen bars 100 can be met.

As shown in fig. 3, according to the embodiment of the present application, the screen basket 10 further includes an upper flange 106 and a lower flange 108, which are respectively disposed at the open ends of both sides of the screen basket 10. Go up flange 106 and lower flange 108 and can weld in the open end of sieve basket 10 both sides, also can adopt the spiro union in the open end of sieve basket 10 both sides, convenient to detach, can also adopt the joint in the open end of sieve basket 10 both sides, of course, this application does not specifically limit to the connected mode of the two, all can the same effect of this application can.

The assembly process of the screen basket 10 of the present application is: meshing the sieve bar 100 in a first tooth groove 1021 of the gear ring 102, connecting the gear ring 102 and the sieve bar 100 in a connecting mode such as welding, removing impurity materials on the outer side of the gear ring 102, and then fitting the support ring 104 on the outer side of the gear ring 102 in an interference fit mode to achieve a fixing effect; finally, the upper flange 106 and the lower flange 108 are welded to openings at both sides of the screen basket 10. The screen basket 10 is simple and firm in structure, good in slurry outlet effect, energy-saving, low in cost and long in service life.

According to an aspect of the application, a pressure screen is proposed, comprising a screen basket 10 as above and a rotor arranged inside the pressure screen. The rotor rotates in a cylindrical screen basket for generating a pressing force for extruding the pulp out of the screen slots.

The pressure screen is in interference fit with the support ring 104 on the outer side of the gear ring 102 and used for increasing the strength of the screen basket 10 so as to meet the requirements during production, the damage condition of the screen basket 10 is greatly reduced, and the production efficiency is improved.

Finally, it should be noted that: although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims (10)

1. A screen basket, comprising:

a plurality of screen bars;

the inner side of each gear ring is axially distributed with a plurality of first tooth grooves, and the plurality of screen bars are meshed in the first tooth grooves to form a cylinder shape;

and each support ring is provided with a second groove along the inner side circumference, and the outer side of each gear ring is clamped in the second groove.

2. A screen basket according to claim 1, further comprising:

and the upper flange and the lower flange are respectively arranged at the opening ends of the two sides of the screen basket.

3. A screen basket according to claim 1, wherein a first gap is formed between any two adjacent screen bars of the plurality of screen bars, and the distance between the first gaps is in the range of 0.05mm to 1 mm.

4. A screen basket according to claim 3, wherein the screen bars are provided with first limiting portions, and the first tooth grooves of the gear ring are provided with second limiting portions matched with the first limiting portions.

5. A screen basket according to claim 4, wherein the first retaining portion comprises a blind hole.

6. A screen basket according to claim 5, wherein the second retaining portion comprises a boss which mates with the blind hole.

7. A screen basket according to claim 1, wherein the plurality of screen bars are welded within the plurality of first gullets.

8. A screen basket according to claim 1, wherein the distance between any adjacent two of the plurality of toothed rings is 20mm to 60 mm.

9. A screen basket according to claim 1, wherein the second recess of the support ring is an interference fit with the toothed ring.

10. A pressure screen, comprising:

a screen basket as recited in any one of claims 1-9;

a rotor disposed inside the screen basket.

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