A filter screen self-cleaning device for waste paper pulping

Abstract

The utility model relates to waste paper pulping technical field, and disclose a filter screen self -cleaning equipment for waste paper pulping, including the conveying pipe, the inner wall fixed connection of conveying pipe has the fixed ring, the inner wall rotation of fixed ring is connected with the filter screen, when cleaning, the output shaft rotation of motor drives bevel gear to rotate, make second bevel gear ring and first bevel gear ring rotate through bevel gear, and the direction of second bevel gear ring and first bevel gear ring is opposite, and the cleaning brush carries out the cleaning to filter screen, simultaneously, when filter screen rotates, drive arc convex block to rotate, when arc convex block rotates and contacts knock head, arc convex block jacks knock head and makes knock head move, spring contracts, when arc convex block does not contact knock head, spring resets and drives knock head to reset and knocks to filter screen, make filter screen vibrate slightly, improve the cleaning effect, the impurity that cleanses falls into the discharge chute in the conical flow guide after the conical flow guide, and is discharged through the discharge pipe.

Description

Technical Field

[0001] This utility model relates to the field of waste paper pulping technology, and more specifically, to a self-cleaning filter screen for waste paper pulping. Background Technology

[0002] With increasing emphasis on resource recycling and environmental protection, waste paper recycling has become an important pathway for the sustainable development of the paper industry. In the recycling process, pulping is a crucial step, aimed at breaking down waste paper into fibers while removing impurities. This application improves upon existing technology, in which filter screens are key components in pulping systems, used to filter the pulp after pulping and separate qualified fibers from impurities (such as plastic flakes, metal shavings, and unseparated paper fragments). However, during long-term use, the filter screen surface is easily clogged by impurities, leading to a decrease in filtration efficiency. This not only affects the quality and yield of the processed pulp but also requires frequent shutdowns for manual cleaning or replacement of the filter screen, increasing production downtime and labor costs, and severely restricting the continuity and stability of production. Currently, filter cleaning methods mostly involve manual periodic cleaning or simple mechanical scraping devices. Manual cleaning is not only labor-intensive and inefficient, but also incomplete, making it difficult to meet the needs of large-scale industrial production. Existing mechanical cleaning devices generally suffer from poor cleaning effects. For example, the relative movement between the cleaning brush and the filter is limited, only wiping the filter surface in one direction, which has limited ability to remove stubborn impurities. At the same time, they lack structures such as auxiliary vibration to enhance the cleaning effect, making it difficult to fundamentally solve the problem of filter clogging. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a self-cleaning filter screen for waste paper pulping.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-cleaning filter screen for waste paper pulping, comprising a conveying pipe, a fixing ring fixedly connected to the inner wall of the conveying pipe, a filter screen rotatably connected to the inner wall of the fixing ring, an installation ring rotatably connected to the outer wall of the filter screen extending out of the fixing ring, and the installation ring rotatably connected to the conveying pipe, a cleaning brush fixedly connected to the inner wall of the installation ring, a plurality of equally spaced striking heads abutting against the side of the filter screen away from the cleaning brush, a fixing post slidably connected to the side of the striking heads away from the filter screen, and a plurality of equally spaced arc-shaped protrusions fixedly connected to the side of the filter screen near the striking heads, the number of arc-shaped protrusions being adapted to the number of striking heads.

[0005] As a preferred embodiment of this utility model, a second bevel gear ring is fixedly connected to the side of the mounting ring near the fixing ring, and a first bevel gear ring is provided on the side of the fixing ring near the mounting ring. The first bevel gear ring is fixedly connected to the filter screen. A bevel gear is provided between the mounting ring and the fixing ring. The bevel gear meshes with the second bevel gear ring and also meshes with the first bevel gear ring.

[0006] As a preferred embodiment of this utility model, a plurality of L-shaped fixing brackets are fixedly connected to the side of the fixing ring away from the mounting ring, and the L-shaped fixing brackets are fixedly connected to the fixing column.

[0007] As a preferred embodiment of this utility model, the striking head is provided with a guide groove, the inner wall of the guide groove is slidably connected to the fixed post, one end of the fixed post extending into the guide groove is fixedly connected to a spring, and the other end of the spring is fixedly connected to the inner wall of the guide groove.

[0008] As a preferred embodiment of this utility model, a motor is fixedly connected to the top outer wall of the conveying pipe, and the output shaft of the motor is fixedly connected to a bevel gear.

[0009] As a preferred technical solution of this utility model, a feeding groove is provided at the bottom of the conveying pipe, and the feeding groove is located below the side of the mounting ring away from the fixed ring. A feeding pipe is fixedly connected to the bottom outer wall of the conveying pipe, and the feeding pipe is connected to the feeding groove. A conical guide channel is provided on the inner wall of the side of the mounting ring away from the fixed ring.

[0010] As a preferred embodiment of this utility model, a sealing ring is fixedly sleeved on the outer wall of the filter screen, and a sealing groove is provided on the inner wall of the mounting ring, and the sealing groove is adapted to the sealing ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In this invention, during cleaning, the motor is started, and the output shaft of the motor rotates, driving the bevel gear to rotate. The bevel gear causes the second bevel gear ring and the first bevel gear ring to rotate, and the second bevel gear ring and the first bevel gear ring rotate in opposite directions. The mounting ring rotates, driving the cleaning brush to rotate, so that the cleaning brush and the filter screen rotate in opposite directions. The cleaning brush cleans the filter screen. At the same time, when the filter screen rotates, it drives the arc-shaped protrusion to rotate. When the arc-shaped protrusion rotates to contact the striking head, the arc-shaped protrusion pushes the striking head, causing the striking head to move. The spring contracts. When the arc-shaped protrusion is no longer in contact with the striking head, the spring resets, causing the striking head to reset and strike the filter screen, causing the filter screen to vibrate slightly, improving the cleaning effect. The cleaned impurities are guided by the conical guide trough to fall into the discharge trough and then discharged through the discharge pipe. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional view of the present invention; Figure 3 This is a schematic diagram of the mounting ring structure of this utility model; Figure 4 In this utility model Figure 1 Enlarged view of point A; Figure 5 In this utility model Figure 1 Enlarged view of point B.

[0013] In the diagram: 1. Conveying pipe; 2. Fixing ring; 3. Filter screen; 4. Motor; 5. Cleaning brush; 6. Feed chute; 7. Feeding pipe; 8. L-shaped fixing bracket; 9. Fixing column; 10. Striking head; 11. First bevel gear ring; 12. Bevel gear; 13. Second bevel gear ring; 14. Mounting ring; 15. Spring; 16. Arc-shaped protrusion; 17. Guide groove; 18. Conical guide chute; 19. Sealing ring; 20. Sealing groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1 to 5 As shown, this utility model provides a self-cleaning device for waste paper pulping filters, including a conveying pipe 1. A fixing ring 2 is fixedly connected to the inner wall of the conveying pipe 1. A filter screen 3 is rotatably connected to the inner wall of the fixing ring 2. An installation ring 14 is rotatably connected to the outer wall of the filter screen 3 extending out of the fixing ring 2, and the installation ring 14 is rotatably connected to the conveying pipe 1. A cleaning brush 5 is fixedly connected to the inner wall of the installation ring 14. A plurality of equally spaced tapping heads 10 are abutted on the side of the filter screen 3 away from the cleaning brush 5. A fixing post 9 is slidably connected to the side of the tapping heads 10 away from the filter screen 3. A plurality of equally spaced arc-shaped protrusions 16 are fixedly connected to the side of the filter screen 3 near the tapping heads 10, and the number of arc-shaped protrusions 16 is adapted to the number of tapping heads 10. The installation ring 14 rotates to drive the cleaning brush 5 to rotate, thereby cleaning the filter screen 3. The tapping heads 10 tap the filter screen 3, causing the filter screen 3 to vibrate slightly, thereby improving the cleaning effect.

[0016] The bristles of the cleaning brush 5 are made of nylon material with a diameter of 0.3-0.5mm and a Shore A hardness of 60-70A. The free length of the bristles is 2-3mm longer than the distance from the inner wall of the mounting ring 14 to the outer wall of the filter screen 3, ensuring a contact pressure of 0.5-1N with the surface of the filter screen 3.

[0017] The arc-shaped protrusion 16 has an arc of 60° and a height of 5-8mm; the end of the striking head 10 is made of polyurethane material (Shore 80A) and has a diameter of 10-15mm.

[0018] The mounting ring 14 is fixedly connected to a second bevel ring 13 on the side near the fixing ring 2. The fixing ring 2 is provided with a first bevel ring 11 on the side near the mounting ring 14. The first bevel ring 11 is fixedly connected to the filter screen 3. A bevel gear 12 is provided between the mounting ring 14 and the fixing ring 2. The bevel gear 12 meshes with the second bevel ring 13 and the first bevel ring 11. The bevel gear 12 drives the first bevel ring 11 and the second bevel ring 13 to rotate, so that the filter screen 3 and the mounting ring 14 rotate in opposite directions, thereby improving the cleaning effect of the cleaning brush 5 on the filter screen 3.

[0019] Among them, the side of the fixing ring 2 away from the mounting ring 14 is fixedly connected with multiple L-shaped fixing brackets 8 distributed at equal intervals, and the L-shaped fixing brackets 8 are fixedly connected to the fixing column 9. The fixing column 9 is fixed by the L-shaped fixing brackets 8, thereby allowing the striking head 10 to move along the fixing column 9.

[0020] The striking head 10 has a guide groove 17 inside. The inner wall of the guide groove 17 is slidably connected to the fixed post 9. One end of the fixed post 9 that extends into the guide groove 17 is fixedly connected to a spring 15, and the other end of the spring 15 is fixedly connected to the inner wall of the guide groove 17. The spring 15 facilitates the striking head 10 to return to its original position after moving under the action of the arc-shaped protrusion 16, thereby enabling the striking head 10 to strike the filter screen 3.

[0021] Spring 15 is a cylindrical helical compression spring with an elastic coefficient of 5-10 N / mm, a free length of 20-30 mm, and a maximum compression capacity that matches the height of the arc-shaped protrusion 16 (i.e., 5-8 mm).

[0022] The top outer wall of the conveying pipe 1 is fixedly connected to a motor 4, and the output shaft of the motor 4 is fixedly connected to the bevel gear 12. The model of the motor 4 is YE2-90S-4. The motor 4 drives the bevel gear 12, thereby causing the bevel gear 12 to rotate.

[0023] The bottom of the conveying pipe 1 is provided with a discharge trough 6, which is located below the side of the mounting ring 14 away from the fixed ring 2. The bottom outer wall of the conveying pipe 1 is fixedly connected to a discharge pipe 7, which is connected to the discharge trough 6. The inner wall of the mounting ring 14 away from the fixed ring 2 is provided with a conical guide channel 18, which guides the material through the conical guide channel 18. The cleaned impurities enter the discharge pipe 7 through the discharge trough 6 and are discharged.

[0024] The cone angle of the conical guide trough 18 is 45°-60°, the inner wall is smooth, and the surface roughness Ra≤1.6μm; the feeding trough 6 and the feeding pipe 7 are connected by a rounded transition, and the diameter of the feeding pipe 7 is not less than the minimum width of the feeding trough 6 to ensure that impurities are discharged smoothly.

[0025] The outer wall of the filter screen 3 is fixedly fitted with a sealing ring 19, and the inner wall of the mounting ring 14 is provided with a sealing groove 20, which is adapted to the sealing ring 19. The sealing ring 19 and the sealing groove 20 provide rotational sealing between the mounting ring 14 and the filter screen 3.

[0026] The sealing ring 19 is made of nitrile rubber with a circular cross-section and a diameter of 3-5mm. It is interference-fitted with the sealing groove 20 (width 4-6mm, depth 2-3mm) with an interference amount of 0.5-1mm. This ensures a sealing effect while reducing rotational friction resistance through the elasticity of the rubber.

[0027] Working principle and usage process of this utility model: In this application, during cleaning, the motor 4 is started, and the output shaft of the motor 4 rotates, driving the bevel gear 12 to rotate. The bevel gear 12 causes the second bevel gear ring 13 and the first bevel gear ring 11 to rotate, and the second bevel gear ring 13 and the first bevel gear ring 11 rotate in opposite directions. The mounting ring 14 rotates, driving the cleaning brush 5 to rotate, so that the cleaning brush 5 and the filter screen 3 rotate in opposite directions. The cleaning brush 5 cleans the filter screen 3. At the same time, when the filter screen 3 rotates, it drives the arc-shaped protrusion 16 to rotate. When the arc-shaped protrusion 16 rotates to contact the striking head 10, the arc-shaped protrusion 16 pushes the striking head 10, causing the striking head 10 to move. The spring 15 contracts. When the arc-shaped protrusion 16 is no longer in contact with the striking head 10, the spring 15 resets, causing the striking head 10 to reset and strike the filter screen 3, causing the filter screen 3 to vibrate slightly, improving the cleaning effect. The cleaned impurities are guided by the conical guide trough 18 and fall into the discharge trough 6, and then discharged through the discharge pipe 7.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning filter screen for waste paper pulping, comprising a conveying pipe (1), characterized in that: A fixing ring (2) is fixedly connected to the inner wall of the conveying pipe (1). A filter screen (3) is rotatably connected to the inner wall of the fixing ring (2). An installation ring (14) is rotatably connected to the outer wall of the filter screen (3) extending out of the fixing ring (2). The installation ring (14) is rotatably connected to the conveying pipe (1). A cleaning brush (5) is fixedly connected to the inner wall of the installation ring (14). A plurality of equally spaced tapping heads (10) are abutted on the side of the filter screen (3) away from the cleaning brush (5). A fixing post (9) is slidably connected to the side of the tapping head (10) away from the filter screen (3). A plurality of equally spaced arc-shaped protrusions (16) are fixedly connected to the side of the filter screen (3) close to the tapping head (10). The number of arc-shaped protrusions (16) is adapted to the number of tapping heads (10).

2. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The mounting ring (14) is fixedly connected to a second bevel ring (13) on the side near the fixing ring (2). The fixing ring (2) is provided with a first bevel ring (11) on the side near the mounting ring (14). The first bevel ring (11) is fixedly connected to the filter screen (3). A bevel gear (12) is provided between the mounting ring (14) and the fixing ring (2). The bevel gear (12) meshes with the second bevel ring (13) and the bevel gear (12) meshes with the first bevel ring (11).

3. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The fixing ring (2) is fixedly connected to a plurality of L-shaped fixing brackets (8) that are equidistantly distributed on the side away from the mounting ring (14), and the L-shaped fixing brackets (8) are fixedly connected to the fixing column (9).

4. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The striking head (10) has a guide groove (17) inside. The inner wall of the guide groove (17) is slidably connected to the fixed column (9). One end of the fixed column (9) extending into the guide groove (17) is fixedly connected to a spring (15), and the other end of the spring (15) is fixedly connected to the inner wall of the guide groove (17).

5. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The top outer wall of the conveying pipe (1) is fixedly connected to a motor (4), and the output shaft of the motor (4) is fixedly connected to a bevel gear (12).

6. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The bottom of the conveying pipe (1) is provided with a discharge groove (6), and the discharge groove (6) is located below the side of the mounting ring (14) away from the fixed ring (2). The bottom outer wall of the conveying pipe (1) is fixedly connected with a discharge pipe (7), and the discharge pipe (7) is connected to the discharge groove (6). The inner wall of the mounting ring (14) away from the fixed ring (2) is provided with a conical guide channel (18).

7. The self-cleaning filter screen for waste paper pulping according to claim 1, characterized in that: The outer wall of the filter screen (3) is fixedly fitted with a sealing ring (19), and the inner wall of the mounting ring (14) is provided with a sealing groove (20), and the sealing groove (20) is compatible with the sealing ring (19).

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