A papermaking fiber fractionating screen

Abstract

The application relates to the technical field of papermaking equipment, in particular to a papermaking fiber grading screen.In the papermaking fiber grading screen provided in the application, the cylinder screen is rotatably inclined on the top of the support through a central shaft arranged in the middle; the collecting disc is fixedly connected through the support and located below the cylinder screen, the two ends are correspondingly provided with a feeding hopper and a discharging hopper, and a discharge port is further arranged on the side face; the two ends of the brush roller are rotatably connected with the support, the brush roller is fixedly installed on the top of the support through the support bolts, and the brush roller is in contact with the wall surface of the cylinder screen through the bristles. In this way, the brush roller can be in contact with the cylinder screen through the bristles at all times to realize real-time removal of impurities blocked in the screen mesh. Moreover, the length of the brush roller is matched with the length of the cylinder screen, so that the brush roller can comprehensively clean the screen meshes with different density distributions on the whole cylinder screen, thereby guaranteeing that the cylinder screen can maintain a relatively strong screening effect during long-term work.

Description

Technical Field

[0001] This application relates to the field of papermaking equipment technology, and more specifically, to a papermaking fiber grading screen. Background Technology

[0002] A paper grading screen is a device used to classify and screen pulp. It is used to separate paper fibers of different sizes, fine gum particles and particulate impurities in order to obtain high-quality paper in subsequent processing stages.

[0003] In related technologies, paper grading screens consist of a cylindrical screen, a transmission device, and a support. Their working principle is as follows: the transmission device drives the cylindrical screen to rotate along its axis at the top of the support. Material enters the cylindrical screen from one end, tumbling and rolling inside, and is graded through different screen meshes. Fine particles are discharged through the screen meshes, while coarse particles are discharged from the other end of the cylindrical screen, thus achieving the function of grading and screening.

[0004] In actual processing, paper fibers can easily clog the screen of a cylindrical screen, causing the grading and screening effect of the cylindrical screen to gradually decrease, thus affecting subsequent papermaking processes. Summary of the Invention

[0005] In view of this, the present application provides a paper fiber grading sieve to solve the problem in the related art that paper fibers easily clog the cylindrical sieve screen, causing its grading and screening effect to gradually decline.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] A paper fiber grading sieve, comprising:

[0008] The support has a drive motor fixedly mounted on its top.

[0009] A cylindrical screen, wherein a central shaft is provided in the middle of the cylindrical screen, the central shaft is rotatably inclined to the top of the support through a bearing, and the height of its inlet end is less than the height of its outlet end. The central shaft is connected to the drive motor through a fixed pulley and belt.

[0010] The material collection tray is fixedly connected to the support and located below the cylindrical screen. It has an inlet hopper and an outlet hopper at its two ends, and a discharge port corresponding to the screen mesh of the cylindrical screen is provided on its side.

[0011] A brush roller is rotatably connected to two ends of a bracket, which is fixedly mounted on the top of the support and located beside the cylindrical screen and abutting against the side of the cylindrical screen. The length of the brush roller is adapted to the length of the cylindrical screen.

[0012] In some possible implementations, the screen density of the cylindrical screen increases gradually from the feed end to the discharge end.

[0013] In some possible implementations, a vertical plate is fixedly provided at the end of the support, the vertical plate is located on one side of the discharge end of the cylindrical screen, and a meshing transmission mechanism is rotatably provided on it along the thickness direction. The meshing transmission mechanism includes an inner roller brush, the inner roller brush is located inside the cylindrical screen and abuts against its inner wall, and its rotation direction is opposite to the rotation direction of the cylindrical screen.

[0014] In some possible implementations, the meshing transmission mechanism further includes a driving gear, a first connecting gear, a second connecting gear, and a first driven gear rotatably mounted on the vertical plate;

[0015] The driving gear is fixedly sleeved on the outside of the central shaft by a key connection, and it is sequentially meshed with the first connecting gear, the second connecting gear and the driven gear. The axle in the middle of the first driven gear is fixedly connected to the inner roller brush.

[0016] In some possible implementations, the meshing transmission mechanism further includes a second driven gear meshing with the first driven gear, wherein a scraper is fixedly connected to the axle in the middle of the gear, the scraper abutting against the inner wall of the cylindrical screen and located above the inner roller brush.

[0017] In some possible implementations, the inner roller brush and the brush roller are arranged in an alternating vertical distribution.

[0018] The paper fiber grading sieve provided in this application has at least the following beneficial effects:

[0019] In the paper fiber grading screen provided in this embodiment, the two ends of the brush roller are rotatably connected to the support. The brush roller is fixedly installed on the top of the support by bolts. The brush roller is located beside the cylindrical screen and contacts the wall of the cylindrical screen through its bristles. Thus, when the cylindrical screen is driven by the motor to grade and screen the pulp, the brush roller can maintain constant contact with the cylindrical screen through its bristles, thereby achieving real-time removal of impurities clogging the screen. Furthermore, the length of the brush roller is adapted to the length of the cylindrical screen, ensuring that the brush roller can thoroughly clean the screen with different density distributions on the entire cylindrical screen, thus ensuring that the cylindrical screen maintains a strong grading and screening effect during long-term operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the paper fiber grading sieve provided in the embodiments of this application;

[0022] Figure 2 for Figure 1 Exploded view of a medium-sized cylindrical sieve;

[0023] Figure 3 for Figure 1 Schematic diagram of the assembly structure of the medium cylindrical screen and the brush roller;

[0024] Figure 4 for Figure 3 Exploded view of the medium-sized brush roller;

[0025] Figure 5 for Figure 4 Schematic diagram of the structure of the medium-sized brush roller;

[0026] Figure 6 An exploded view of the driving structure of a paper fiber grading screen provided in another embodiment of this application;

[0027] Figure 7 for Figure 6 A structural diagram from another perspective;

[0028] Figure 8 for Figure 6 A schematic diagram showing the distribution of the medium cylindrical screen, brush roller, inner roller brush, and scraper.

[0029] In the picture:

[0030] 100. Support; 110. Drive motor; 120. Vertical plate;

[0031] 200. Cylindrical screen; 210. Central shaft; 220. Bearing; 230. Belt; 240. Pulley;

[0032] 300. Collection tray; 310. Feed hopper; 320. Discharge hopper; 330. Discharge port;

[0033] 400. Brush roller; 410. Support frame;

[0034] 500, Inner roller brush;

[0035] 600. Driving gear; 610. First connecting gear; 620. Second connecting gear; 630. First driven gear;

[0036] 700, scraper; 710, second driven gear. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] like Figure 1 and Figure 5 As shown, the paper fiber grading screen provided in this application embodiment includes a support 100, a cylindrical screen 200, a collecting plate 300 and a brush roller 400. The support 100 is the bearing mechanism of the entire grading screen, which is welded and spliced ​​from multiple 304 stainless steel pipes. The top of the support 100 is fixedly installed with a drive motor 110 by bolts. The drive motor 110 is the transmission mechanism of the grading screen.

[0039] The cylindrical screen 200 is a device used for screening and separating paper fibers. It is cylindrical in shape and open at both ends. The wall of the cylindrical screen 200 is woven from multiple metal wire meshes with varying mesh densities along its length to achieve a grading and screening function. Specifically, the mesh density of the cylindrical screen 200 gradually increases from the inlet end to the outlet end. The cylindrical screen 200 is placed horizontally and inclined on top of the support 100. The height of the inlet end of the cylindrical screen 200 is less than the height of its outlet end, and a central shaft 210 is fixedly installed along its axial direction. Correspondingly, two sets of bearings 220 are symmetrically arranged on the top of the support 100, and the central shaft 210 of the cylindrical screen 200 is coaxially and fixedly connected to the two sets of bearings 220.

[0040] Specifically, both the central shaft 210 and the drive shaft of the drive motor 110 are connected to pulleys 240 by keys, and the two pulleys 240 are connected by a belt 230. Therefore, the drive motor 110 can drive the cylindrical screen 200 to rotate at a certain tilt angle on the top of the support 100.

[0041] like Figures 1-3As shown, the collection tray 300 is fixedly installed at the bottom of the support 100 and located below the cylindrical screen 200. The overall length of the collection tray 300 is adapted to the length of the cylindrical screen 200. A feed hopper 310 is provided on one side of the inlet end of the collection tray 300, and a discharge hopper 320 is provided on one side of the outlet end of the collection tray 300. The inclination direction and angle of the collection tray 300 are equal to those of the cylindrical screen 200. Furthermore, multiple discharge ports 330 are correspondingly provided below the collection tray 300. Each discharge port 330 corresponds to a metal wire mesh of different densities on the cylindrical screen 200 to achieve directional collection after subsequent grading and screening.

[0042] In this embodiment, the brush roller 400 is rotatably connected to brackets 410 at both ends, and the brush roller 400 is fixedly mounted on the top of the support 100 via the brackets 410. Figure 1 , Figures 3-5 As shown, the brush roller 400 is located beside the cylindrical screen 200, and the brush roller 400 contacts the wall surface of the cylindrical screen 200 through the bristles distributed on its surface. Therefore, when the cylindrical screen 200 rotates for screening along the axial direction, the brush roller 400 can brush the cylindrical screen 200 with its bristles to prevent material blockage.

[0043] Preferably, the angle between the brush roller 400 and the support 410 is adjustable, thereby adjusting the distance between the bristles of the brush roller 400 and the wall of the cylindrical screen 200. This structural design is prior art, and will not be elaborated upon further in this application embodiment; any implementation of this application embodiment is acceptable.

[0044] The following is combined with Figures 1-5 The workflow of the paper fiber grading sieve provided in the embodiments of this application is described.

[0045] The drive motor 110 is pre-started to rotate the cylindrical screen 200, and the pulp is poured into the rotating cylindrical screen 200 from the feed hopper 310. During the rotation of the cylindrical screen 200, the pulp is sieved step-by-step through screens of different densities within the inclined screen. The fine fibers after grading pass through the cylindrical screen 200 into the corresponding discharge port 330 and are ultimately collected directionally through the discharge port 330. The coarse fibers are discharged from the cylindrical screen 200 through the discharge hopper 320. During the rotation of the cylindrical screen 200, the brush roller 400 remains in constant contact with the wall of the cylindrical screen 200 through its bristles to remove impurities from the screen in real time, preventing screen clogging.

[0046] In some embodiments, such as Figures 6-8As shown, a vertical plate 120 is fixedly installed at the end of the support 100. The vertical plate 120 is located on the discharge end side of the cylindrical screen 200. It is equipped with a meshing transmission mechanism that rotates along the thickness direction. The meshing transmission mechanism includes an inner roller brush 500. The inner roller brush 500 is located inside the cylindrical screen 200 and abuts against its inner wall. Its rotation direction is opposite to that of the cylindrical screen 200.

[0047] The meshing transmission mechanism also includes a drive gear 600, a first connecting gear 610, a second connecting gear 620 and a first driven gear 630 rotatably mounted on the vertical plate 120. The drive gear 600 is fixedly sleeved on the outside of the central shaft 210 by a key connection, and it meshes with the first connecting gear 610, the second connecting gear 620 and the driven gear in sequence. The wheel axle in the middle of the first driven gear 630 is fixedly connected to the inner roller brush 500.

[0048] An inner roller brush 500 is installed inside the cylindrical screen 200 through a multi-stage gear meshing structure. The rotation direction of the inner roller brush 500 is opposite to that of the cylindrical screen 200. Therefore, a certain shearing force can be generated by the reverse rotation, thereby pushing the paper fibers embedded in the deep layer of the screen of the cylindrical screen 200 outward, so as to solve the defect that the external brush roller 400 cannot remove paper fiber impurities in the deep layer of the screen.

[0049] Preferably, the meshing transmission mechanism further includes a second driven gear 710 meshing with the first driven gear 630, wherein a scraper 700 is fixedly connected to the axle in its middle, and the scraper 700 abuts against the inner wall of the cylindrical screen 200 and is located above the inner roller brush 500. Figure 8 As shown, a scraper 700 is installed above the inner roller brush 500. The scraper 700 can scrape away residual paper fiber clumps on the inner wall of the cylindrical screen 200 at a certain angle, thereby achieving the function of pre-cleaning the screen. The simultaneous use of the inner roller brush 500 and the brush roller 400 can further improve the cleaning effect on the screen.

[0050] Specifically, the scraper 700 can be made of PVC material, which has a certain degree of elasticity. Therefore, while ensuring the scraping effect, it can also prevent damage to the cylindrical screen 200, thereby extending the service life of the cylindrical screen 200. (About Figure 8 (This is for illustrative purposes only. In actual processing and use, there is no conflict between the scraper 700 and the inner roller brush 500 during rotation.)

[0051] In some embodiments, the inner roller brush 500 and the brush roller 400 are arranged in an alternating vertical distribution, which can expand the cleaning area of ​​the cylindrical screen 200 and thus eliminate cleaning blind spots as much as possible.

[0052] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0053] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0054] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0055] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0056] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0057] As used herein, the term "substrate" refers to the material on which subsequent material layers are added. The substrate itself may be patterned. The material added on top of the substrate may be patterned or may remain unpatterned. Furthermore, the substrate may include a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate may be made of a non-conductive material (e.g., glass, plastic, or sapphire wafers).

[0058] The term "layer" as used herein can refer to a portion of material comprising a region of thickness. A layer may extend over the entire underlying or overlying structure, or may have a extent smaller than that of the underlying or overlying structure. Furthermore, a layer may be a region of a homogeneous or non-homogeneous continuous structure, with a thickness less than that of the continuous structure. For example, a layer may be located between the top and bottom surfaces of the continuous structure, or between any pairs of lateral planes at the top and bottom surfaces. A layer may extend laterally, vertically, and / or along a tapered surface. A substrate may be a layer, and may include one or more layers, and / or may have one or more layers located on, above, and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductor and contact layers (forming contacts, interconnects, and / or vias therein) and one or more dielectric layers.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A papermaking fiber grading sieve, characterized in that, include: The support has a drive motor fixedly mounted on its top. A cylindrical screen, wherein a central shaft is provided in the middle of the cylindrical screen, the central shaft is rotatably inclined to the top of the support through a bearing, and the height of its inlet end is less than the height of its outlet end. The central shaft is connected to the drive motor through a fixed pulley and belt. The material collection tray is fixedly connected to the support and located below the cylindrical screen. It has an inlet hopper and an outlet hopper at its two ends, and a discharge port corresponding to the screen mesh of the cylindrical screen is provided on its side. A brush roller is rotatably connected to two ends of a bracket, which is fixedly mounted on the top of the support and located beside the cylindrical screen and abutting against the side of the cylindrical screen. The length of the brush roller is adapted to the length of the cylindrical screen.

2. The papermaking fiber grading sieve according to claim 1, characterized in that, The screen density of the cylindrical screen increases gradually from the feed end to the discharge end.

3. The papermaking fiber grading sieve according to claim 1, characterized in that, A vertical plate is fixedly installed at the end of the support. The vertical plate is located on one side of the discharge end of the cylindrical screen. A meshing transmission mechanism is rotatably installed on the vertical plate along the thickness direction. The meshing transmission mechanism includes an inner roller brush. The inner roller brush is located inside the cylindrical screen and abuts against its inner wall. Its rotation direction is opposite to that of the cylindrical screen.

4. The papermaking fiber grading sieve according to claim 3, characterized in that, The meshing transmission mechanism further includes a driving gear, a first connecting gear, a second connecting gear, and a first driven gear rotatably mounted on the vertical plate; The driving gear is fixedly sleeved on the outside of the central shaft by a key connection, and it is sequentially meshed with the first connecting gear, the second connecting gear and the driven gear. The axle in the middle of the first driven gear is fixedly connected to the inner roller brush.

5. The papermaking fiber grading sieve according to claim 4, characterized in that, The meshing transmission mechanism also includes a second driven gear that meshes with the first driven gear, wherein a scraper is fixedly connected to the axle in the middle of the gear, and the scraper abuts against the inner wall of the cylindrical screen and is located above the inner roller brush.

6. The papermaking fiber grading sieve according to claim 3, characterized in that, The inner roller brush and the brush roller are arranged in an alternating vertical arrangement.

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