Papermaking pulp filtering equipment capable of quickly replacing filter screen

Abstract

The utility model relates to the related technical field of papermaking pulp filtering, in particular to papermaking pulp filtering equipment capable of quickly replacing a filter screen, which comprises an equipment main body, a rotating cylinder is arranged on the lower side of the bottom end of the equipment main body, and a feeding cylinder is arranged at the end part of the upper end of the equipment main body; the upper and lower sides of the middle of the inner side of the equipment body are each provided with a set of conical filtering plates, and the middle of the inner side of the rotating cylinder is provided with a set of filtering treatment boxes in a front-back symmetry mode. According to the improved papermaking pulp filtering equipment with the filter screen capable of being rapidly replaced, a rectangular replacement frame is arranged in the middle of the right end of the inner side of a filtering treatment box, and paper pulp is continuously extruded through a spiral structure of a spiral conveying shaft, so that the paper pulp can be filtered and discharged through the filter screen of a rectangular filter plate; meanwhile, a rotating cylinder needs to be opened, and a rotating sealing plate is rotated, so that a user can replace the rectangular filter plate in the middle of the inner side of a rectangular replacement frame, and the influence on the filtering progress is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of paper pulp filtration, specifically a paper pulp filtration device with a quickly replaceable filter screen. Background Technology

[0002] In the papermaking process, waste paper is usually used as raw material for recycling resources. However, since waste paper usually contains large impurities such as sand and iron wire, it is necessary to filter the waste paper pulp to remove the large impurities in the waste paper in order to ensure that the quality of the finished paper meets the requirements.

[0003] In the prior art, filtration devices for paper pulp usually have the drawbacks of complex structure, high production cost and poor impurity separation effect. At the same time, after a large amount of pulp is filtered, a large amount of impurities often stick to the surface of the filter screen plate inside the equipment, which in turn affects the subsequent processing of the equipment.

[0004] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: 1. In the process of processing paper pulp, the impurities inside the traditional paper pulp filtration equipment will accumulate on the surface of the filter screen, which will affect the rate of subsequent pulp passage and slow down the filtration process; 2. In the process of processing pulp, waste paper pulp and impurities in the traditional paper pulp filtration equipment will clog the surface of the filter screen, which will cause the pulp to clog the screen surface. Utility Model Content

[0005] The purpose of this utility model is to provide a paper pulp filtration device with a quickly replaceable filter screen, thereby solving the problems mentioned in the background art regarding the lack of a structure for easy filter screen replacement and the lack of a structure to vibrate the filter screen surface to prevent clogging. To achieve the above objective, this utility model provides the following technical solution: a paper pulp filtration device with a quickly replaceable filter screen, comprising a device body, a rotating cylinder provided at the lower bottom of the device body, and a feed cylinder provided at the upper end of the device body. A set of conical filter plates are provided on both the upper and lower sides of the inner center of the device body, and a set of filtration boxes are symmetrically arranged at the front and rear of the inner center of the rotating cylinder.

[0006] A set of stirring plates is provided in the middle of the inner side of the feed cylinder, and a feeding baffle is provided at the bottom end of the stirring plates. A rectangular through groove is opened in the middle of both the front and rear ends of the feeding baffle. An annular feeding plate is provided on the outer side of the bottom end of the conical filter plate. A sealing connecting ring is provided on the outer side of the outer ring surface of the annular feeding plate. A drain pipe is provided in the middle of the right end of the rotating cylinder.

[0007] A receiving hopper is provided on the lower side of the bottom end of the sealing connecting ring, and a distributing box is provided in the middle of the left side of the bottom end of the receiving hopper. A set of spiral conveying shafts is provided on the inner side of the filter treatment box, and a chain sprocket assembly is provided in the middle of the left end of the filter treatment box. A drive motor is connected to the middle of the left side surface of the chain sprocket assembly, and a set of rectangular replacement frames is provided in the middle of the right end of the inner side of the filter treatment box. A rectangular filter plate is provided in the middle of the inner side of the rectangular replacement frame, and a rotating sealing plate is provided in the groove on the side surface of the rectangular replacement frame near the front and rear ends of the rotating cylinder.

[0008] The outer surface of the sealing connecting ring is provided with four sets of arc-shaped sawtooth plates at equal intervals, and the middle of both ends of the arc-shaped sawtooth plates are provided with spring buffer rods. The outer arc surface of the arc-shaped sawtooth plates is connected to rotating gears, and the middle of the rotating gears is provided with power rods. The middle of the right end of the filter treatment box is connected to a connecting pipe.

[0009] More preferably, the bottom surface of the feed cylinder is fixed to the upper surface of the upper circular groove of the main body of the equipment, and the bottom center of the stirring plate is connected to an electric motor through a coupling. The bottom center of the stirring plate is connected to the upper surface center of the discharge baffle. The outer ring surface of the discharge baffle is sealed to the bottom of the inner wall of the feed cylinder, and the center of the rectangular through grooves on the front and rear sides of the discharge baffle is located directly above the upper center of the conical filter plate.

[0010] More preferably, the outer ring surface of the sealing connection ring is sealed to the middle of the upper and lower sides of the inner wall of the main body of the equipment, and the outer ring surface of the annular feeding plate is sealed to the bottom end of the inner ring surface of the sealing connection ring. The bottom end surface of the conical filter plate is fixed to the middle of the upper end surface of the inner side of the annular feeding plate. The screen diameter of the upper conical filter plate is larger than the screen diameter of the lower conical filter plate.

[0011] More preferably, the arc surface of the arc-shaped sawtooth plate near the conical filter plate is fixed to the outer end of the sealing connecting ring, and a set of sawtooth blocks is fixed in the middle of the other arc surface of the arc-shaped sawtooth plate. The end of the spring buffer rod near the arc-shaped sawtooth plate is slidably connected to the inner wall of the circular groove in the middle of the two sides of the arc-shaped sawtooth plate by means of a spring sleeve. The other end of the spring buffer rod is fixed to the inner wall of the main body of the equipment. The end of the rotating gear near the sealing connecting ring is meshed with the middle of the sawtooth block of the arc-shaped sawtooth plate. The middle part of the power rod is fixed through the inner wall of the circular groove in the middle of the rotating gear.

[0012] More preferably, the upper surface of the receiving hopper is sealed and fixed to the bottom surface of the lower sealing connecting ring, and the inner wall of the bottom groove of the receiving hopper is sealed and connected to the upper side of the upper groove of the distributing box. The bottom surface of the inner wall of the distributing box is connected to the inner wall of the middle groove on the left side of the upper end of the filter treatment box by opening two sets of rectangular through grooves.

[0013] More preferably, the right end of the drive motor is connected to the middle of the left side surface of the chain and sprocket assembly via a coupling, and the left end of the spiral transmission shaft is fixed to the middle of the front and rear ends of the right side surface of the chain and sprocket assembly. The right end of the spiral transmission shaft is connected to a connecting plate via a bearing and fixed to the middle of the right side of the inner wall of the filter treatment box. The front and rear ends of the left end of the connecting pipe are sealed to the inner wall of the right end circular groove of the filter treatment box, and the right end of the connecting pipe is connected to the inner wall of the groove of the drain pipe.

[0014] In a further preferred embodiment, the right end of the rotating sealing plate is rotatably connected to the inner wall of the groove on one side of the rectangular filter plate near the front and rear ends of the rotating cylinder by a circular through groove, and a torsion spring is provided in the middle of the circular groove of the rotating sealing plate. Furthermore, the upper and lower end surfaces of the rectangular filter plate are slidably connected to the inner walls of the upper and lower sliding grooves on the inner wall of the rectangular replacement frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this invention, a rectangular replacement frame and a rotating sealing plate are provided. The rectangular replacement frame is located in the middle of the right side of the inner side of the filter treatment box. The pulp is continuously squeezed by the spiral structure of the spiral conveyor shaft, so that the pulp can be filtered and discharged through the screen of the rectangular filter plate, so that impurities are filtered on the left side surface of the rectangular filter plate. At the same time, the user needs to open the rotating cylinder and rotate the rotating sealing plate so that the user can replace the rectangular filter plate in the middle of the inner side of the rectangular replacement frame, so as to avoid impurities affecting the filtration process.

[0017] In this invention, a power rod and an arc-shaped sawtooth plate are provided. The drive structure at the end of the power rod drives the rotating gear in the middle of the power rod to rotate, which in turn causes the rotating gear to drive the arc-shaped sawtooth plate to rotate to one side through the sawtooth block on the outer ring. The elastic force of the spring buffer rod causes the arc-shaped sawtooth plate to continuously rotate and vibrate along the inner wall of the main body of the equipment, so that the pulp on the upper side of the conical filter plate can continuously vibrate and be filtered through the screen of the conical filter plate and fall to the lower side of the annular feed plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the overall unfolded structure of this utility model;

[0020] Figure 3 This is an enlarged structural diagram of the conical filter plate of this utility model;

[0021] Figure 4 This is an enlarged schematic diagram of the spiral conveyor shaft structure of this utility model;

[0022] Figure 5 This is an enlarged structural schematic diagram of the rectangular filter plate of this utility model.

[0023] In the diagram: 1. Main body of the equipment; 2. Rotating cylinder; 3. Feed cylinder; 4. Drainage pipe; 5. Stirring plate; 6. Discharge partition; 7. Conical filter plate; 8. Annular discharge plate; 9. Sealing connection ring; 10. Receiving hopper; 11. Distribution box; 12. Filtration treatment box; 13. Connecting pipe; 14. Power rod; 15. Rotating gear; 16. Arc-shaped serrated plate; 17. Spring buffer rod; 18. Drive motor; 19. Chain and sprocket assembly; 20. Spiral conveyor shaft; 21. Rectangular replacement frame; 22. Rectangular filter plate; 23. Rotating sealing plate. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 5 This utility model provides a technical solution: a paper pulp filtration device with quick-replaceable filter screen, including a device body 1, a rotating cylinder 2 is provided on the lower side of the bottom end of the device body 1, and a feed cylinder 3 is provided on the upper end of the device body 1. A set of conical filter plates 7 are provided on both the upper and lower sides of the inner middle of the device body 1, and a set of filtration treatment boxes 12 are symmetrically arranged in the front and back of the inner middle of the rotating cylinder 2.

[0026] A set of stirring plates 5 is provided in the middle of the inner side of the feed cylinder 3, and a feeding baffle 6 is provided at the bottom end of the stirring plate 5. A rectangular through groove is provided in the middle of both the front and rear ends of the feeding baffle 6, and an annular feeding plate 8 is provided on the outer side of the bottom end of the conical filter plate 7. A sealing connection ring 9 is provided on the outer side of the outer ring surface of the annular feeding plate 8, and a drain pipe 4 is provided in the middle of the right end of the rotating cylinder 2.

[0027] A receiving hopper 10 is provided on the lower side of the bottom end of the sealing connection ring 9, and a distributing box 11 is provided in the middle of the left side of the bottom end of the receiving hopper 10. A set of spiral conveying shafts 20 are provided on the inner side of the filter treatment box 12, and a chain sprocket assembly 19 is provided in the middle of the left end of the filter treatment box 12. A drive motor 18 is connected to the middle of the left side surface of the chain sprocket assembly 19, and a set of rectangular replacement frames 21 is provided in the middle of the right end of the inner side of the filter treatment box 12. A rectangular filter plate 22 is provided in the middle of the inner side of the rectangular replacement frame 21, and a rotating sealing plate 23 is provided in the groove on the side surface of the rectangular replacement frame 21 near the front and rear ends of the rotating cylinder 2.

[0028] The outer surface of the sealing connection ring 9 is provided with four sets of arc-shaped sawtooth plates 16 at equal intervals. The middle of both ends of the arc-shaped sawtooth plates 16 are provided with spring buffer rods 17. The outer arc surface of the arc-shaped sawtooth plates 16 is connected to rotating gears 15. The middle of the rotating gears 15 is provided with power rods 14. The middle of the right end of the filter treatment box 12 is connected with a connecting pipe 13.

[0029] In this embodiment, as Figure 2 As shown, the bottom surface of the feed cylinder 3 is fixed to the upper surface of the circular groove at the upper end of the main body 1, and the middle part of the bottom end of the stirring plate 5 is connected to an electric motor through a coupling. The middle part of the bottom end of the stirring plate 5 is connected to the middle part of the upper surface of the discharge partition plate 6 by a bearing. The outer ring surface of the discharge partition plate 6 is sealed to the bottom end of the inner wall of the feed cylinder 3, and the middle part of the rectangular through grooves on the front and rear sides of the discharge partition plate 6 is located directly above the middle part of the upper end of the conical filter plate 7. By setting a set of stirring plates 5 inside the feed cylinder 3, the stirring plates 5 can agitate the pulp on the upper side of the discharge partition plate 6.

[0030] In this embodiment, as Figure 2 As shown, the outer surface of the sealing connecting ring 9 is sealed to the middle of the upper and lower sides of the inner wall of the equipment body 1, and the outer surface of the annular feeding plate 8 is sealed to the bottom end of the inner surface of the sealing connecting ring 9. The bottom surface of the conical filter plate 7 is fixed to the middle of the upper surface of the inner side of the annular feeding plate 8. The screen diameter of the upper conical filter plate 7 is larger than that of the lower conical filter plate 7. By setting two sets of conical filter plates 7 inside the equipment body 1, the pulp can be filtered through the screen structure of the conical filter plate 7.

[0031] In this embodiment, as Figure 3As shown, the arc surface of the arc-shaped sawtooth plate 16 near the conical filter plate 7 is fixed to the outer end of the sealing connecting ring 9, and a set of sawtooth blocks is fixed in the middle of the arc surface of the other side of the arc-shaped sawtooth plate 16. The end of the spring buffer rod 17 near the arc-shaped sawtooth plate 16 is slidably connected to the inner wall of the circular groove in the middle of the two sides of the arc-shaped sawtooth plate 16 by means of a spring sleeve. The other end of the spring buffer rod 17 is fixed to the inner wall of the main body 1 of the equipment. The end of the rotating gear 15 near the sealing connecting ring 9 is meshed with the middle of the sawtooth block of the arc-shaped sawtooth plate 16. The middle part of the power rod 14 is fixed through the inner wall of the circular groove in the middle of the rotating gear 15. The power rod 14 can drive the rotating gear 15 to rotate, and then drive the arc-shaped sawtooth plate 16 to slide through the sawtooth block. At the same time, the spring buffer rods 17 at both ends of the arc-shaped sawtooth plate 16 vibrate continuously.

[0032] In this embodiment, as Figure 2 As shown, the upper surface of the receiving hopper 10 is sealed and fixed to the bottom surface of the lower sealing connecting ring 9, and the inner wall of the bottom groove of the receiving hopper 10 is sealed and connected to the upper side of the upper groove of the distributing box 11. The bottom surface of the inner wall of the distributing box 11 is connected to the inner wall of the middle groove on the upper left side of the filter treatment box 12 by opening two sets of rectangular through grooves. By setting the receiving hopper 10 and the distributing box 11 at the bottom of the sealing connecting ring 9, the pulp filtered by the upper filter structure of the sealing connecting ring 9 can be transported in batches to the inner side of the filter treatment box 12.

[0033] In this embodiment, as Figure 4 As shown, the right end of the drive motor 18 is connected to the middle of the left side surface of the chain sprocket assembly 19 via a coupling, and the left end of the screw conveyor shaft 20 is fixed to the middle of the front and rear ends of the right side surface of the chain sprocket assembly 19. The right end of the screw conveyor shaft 20 is connected to a connecting plate via a bearing and fixed to the middle of the right side of the inner wall of the filter treatment box 12. The front and rear ends of the left end of the connecting pipe 13 are sealed and connected to the inner wall of the right end circular groove of the filter treatment box 12, and the right end of the connecting pipe 13 is connected to the inner wall of the groove of the drain pipe 4. The drive motor 18 can drive the right side chain sprocket assembly 19 to rotate, thereby enabling the chain sprocket assembly 19 to drive the screw conveyor shaft 20 to rotate, and the pulp inside the filter treatment box 12 is squeezed and conveyed through the screw structure.

[0034] In this embodiment, as Figure 5As shown, the right end of the rotating sealing plate 23 is rotatably connected to the inner wall of the groove on one side of the rectangular filter plate 22 near the front and rear ends of the rotating cylinder 2 through a circular through groove. A torsion spring is provided in the middle of the circular groove of the rotating sealing plate 23. The upper and lower surfaces of the rectangular filter plate 22 are slidably connected to the inner walls of the upper and lower sliding grooves on the inner wall of the rectangular replacement frame 21. By rotating the rotating sealing plate 23 inside the groove on one side of the rectangular replacement frame 21, the user can replace the rectangular filter plate 22 inside the rectangular replacement frame 21.

[0035] The usage and advantages of this utility model: This paper pulp filtration equipment with a quick-change filter screen operates as follows:

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the user can first pour the pulp to be processed into the inside of the feed cylinder 3, and drive the mixing plate 5 to rotate through the drive component at the end of the mixing plate 5, so that the mixing plate 5 can drive the pulp to be continuously stirred, and at the same time drive the pulp to fall into the interior of the main body of the equipment through the rectangular through groove in the middle of the front and rear sides of the feed partition 6.

[0037] After the pulp falls, it slides down the slope of the conical filter plate 7 onto the upper side of the annular feed plate 8 and is filtered through the screen of the conical filter plate 7. Finally, it falls into the inner side of the receiving hopper 10 at the bottom of the sealing connecting ring 9. The drive assembly on the upper side of the power rod 14 drives the rotating gear 15 in the middle of the power rod 14 to rotate. The sawtooth block in the middle of the rotating gear 15 drives the arc-shaped sawtooth plate 16 to slide. The spring force of the spring buffer rod 17 at the end of the arc-shaped sawtooth plate 16 can also drive the arc-shaped sawtooth plate 16 to slide left and right along the inner wall of the equipment body 1, thereby allowing the pulp to pass through the distribution box 1 at the bottom of the receiving hopper 10. The pulp particles fall into the filter chamber 12, and the drive motor 18 on the left side of the filter chamber 12 drives the chain and sprocket assembly 19 on the right side to rotate. This causes the two sets of spiral conveyor shafts 20 on the right side of the chain and sprocket assembly 19 to rotate, which in turn drives the pulp to be squeezed and conveyed through the spiral structure. The pulp is filtered through the rectangular filter plate 22 on the left side of the rectangular replacement frame 21 and flows out through the connecting pipe 13 on the right side of the filter chamber 12. Finally, it is discharged into the rotating cylinder 2 through the drain pipe 4. The user can rotate the sealing plate 23 to remove the rectangular filter plate 22 inside the rectangular replacement frame 21 for cleaning and replacement.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A paper pulp filtration device with a quick-change filter screen, comprising a main body (1), characterized in that: A rotating cylinder (2) is provided on the lower side of the bottom of the main body of the equipment (1), and a feed cylinder (3) is provided on the upper end of the main body of the equipment (1). A set of conical filter plates (7) are provided on both the upper and lower sides of the inner middle of the main body of the equipment (1), and a set of filter treatment boxes (12) are symmetrically arranged in the front and back of the inner middle of the rotating cylinder (2). A set of stirring plates (5) is provided in the middle of the inner side of the feed cylinder (3), and a feeding baffle (6) is provided at the bottom end of the stirring plate (5). A rectangular through groove is provided in the middle of both the front and rear ends of the feeding baffle (6), and an annular feeding plate (8) is provided on the outer side of the bottom end of the conical filter plate (7). A sealing connecting ring (9) is provided on the outer side of the outer ring surface of the annular feeding plate (8), and a drain pipe (4) is provided in the middle of the right end of the rotating cylinder (2). A receiving hopper (10) is provided on the lower side of the bottom end of the sealing connecting ring (9), and a distributing box (11) is provided on the middle left side of the bottom end of the receiving hopper (10). A set of spiral conveying shafts (20) are provided on the inner side of the filter treatment box (12), and a chain sprocket assembly (19) is provided on the middle left side of the filter treatment box (12). A drive motor (18) is connected to the middle left surface of the chain sprocket assembly (19), and a set of rectangular replacement frames (21) is provided on the middle right side of the inner side of the filter treatment box (12). A rectangular filter plate (22) is provided on the middle inner side of the rectangular replacement frame (21), and a rotating sealing plate (23) is provided on the side surface of the rectangular replacement frame (21) near the front and rear ends of the rotating cylinder (2). The outer ring surface of the sealing connection ring (9) is provided with four sets of arc-shaped sawtooth plates (16) at equal intervals, and the middle of the left and right ends of the arc-shaped sawtooth plates (16) are provided with spring buffer rods (17). The outer arc surface of the arc-shaped sawtooth plates (16) is connected to rotating gears (15), and the middle of the rotating gears (15) is provided with power rods (14). The middle of the right end of the filter treatment box (12) is connected with a connecting pipe (13).

2. The paper pulp filtration device with a quickly replaceable filter screen according to claim 1, characterized in that: The bottom surface of the feed cylinder (3) is fixed to the upper side surface of the upper circular groove of the main body of the equipment (1), and the bottom center of the stirring plate (5) is connected to an electric motor through a coupling. The bottom center of the stirring plate (5) is connected to the upper surface center of the discharge partition (6) by a bearing. The outer ring surface of the discharge partition (6) is sealed to the bottom of the inner wall of the feed cylinder (3), and the middle of the rectangular through grooves on the front and rear sides of the discharge partition (6) is located directly above the upper center of the conical filter plate (7).

3. The paper pulp filtration equipment with a quickly replaceable filter screen according to claim 1, characterized in that: The outer ring surface of the sealing connection ring (9) is sealed to the middle of the upper and lower sides of the inner wall of the main body of the equipment (1), and the outer ring surface of the annular feed plate (8) is sealed to the bottom end of the inner ring surface of the sealing connection ring (9). The bottom end surface of the conical filter plate (7) is fixed to the middle of the upper end surface of the inner side of the annular feed plate (8). The screen diameter of the upper conical filter plate (7) is larger than the screen diameter of the lower conical filter plate (7).

4. A paper pulp filtration device with a quickly replaceable filter screen according to claim 1, characterized in that: The arc surface of the arc-shaped sawtooth plate (16) near the conical filter plate (7) is fixed to the outer end of the sealing connecting ring (9), and a set of sawtooth blocks are fixed in the middle of the arc surface of the other side of the arc-shaped sawtooth plate (16). The end of the spring buffer rod (17) near the arc-shaped sawtooth plate (16) is slidably connected to the inner wall of the circular groove in the middle of the two sides of the arc-shaped sawtooth plate (16) by a spring sleeve. The other end of the spring buffer rod (17) is fixed to the inner wall of the main body of the equipment (1). The end of the rotating gear (15) near the sealing connecting ring (9) is meshed with the middle of the sawtooth block of the arc-shaped sawtooth plate (16). The middle of the power rod (14) is fixed through the inner wall of the circular groove in the middle of the rotating gear (15).

5. A paper pulp filtration device with a quickly replaceable filter screen according to claim 1, characterized in that: The upper surface of the receiving hopper (10) is sealed and fixed to the bottom surface of the sealing connecting ring (9) on the lower side, and the inner wall of the bottom groove of the receiving hopper (10) is sealed and connected to the upper side of the upper groove of the distributing box (11). The bottom surface of the inner wall of the distributing box (11) is connected to the inner wall of the middle groove on the left side of the upper end of the filter treatment box (12) by opening two sets of rectangular through grooves.

6. A paper pulp filtration device with a quickly replaceable filter screen according to claim 1, characterized in that: The right end of the drive motor (18) is connected to the middle of the left side surface of the chain sprocket assembly (19) via a coupling, and the left end of the spiral transmission shaft (20) is fixed to the middle of the front and rear ends of the right side surface of the chain sprocket assembly (19). The right end of the spiral transmission shaft (20) is connected to a connecting plate via a bearing and fixed to the middle of the right side of the inner wall of the filter treatment box (12). The front and rear ends of the left end of the connecting pipe (13) are sealed and connected to the inner wall of the right end circular groove of the filter treatment box (12), and the right end of the connecting pipe (13) is connected to the inner wall of the groove of the drain pipe (4).

7. A paper pulp filtration device with a quickly replaceable filter screen according to claim 1, characterized in that: The right end of the rotating sealing plate (23) is rotatably connected to the inner wall of the groove on one side of the rectangular filter plate (22) near the front and rear ends of the rotating cylinder (2) through a circular through groove. A torsion spring is provided in the middle of the circular groove of the rotating sealing plate (23). The upper and lower surfaces of the rectangular filter plate (22) are slidably connected to the inner walls of the upper and lower sliding grooves of the inner wall of the rectangular replacement frame (21).

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