Paper pair trimming squirt anti-pulp-accumulation and self-cleaning device

Abstract

The utility model discloses a paper pair trimming water needle slurry accumulation preventing and self-cleaning device which comprises an air pump, a spraying box, a filtering assembly and an air blowing pipeline. The spraying box is provided with a plurality of nozzles facing the trimming water needle spraying head. The filtering assembly communicates with the air pump and is used for filtering impurities in air output by the air pump; an outlet of the air blowing pipeline is communicated with the obliquely arranged spraying box, and an inlet of the air blowing pipeline is communicated with the filtering assembly; the air blowing pipeline is connected with a pushing piece, and the pushing piece can push the upper end or the lower end of the spraying box to rotate through telescopic movement of the pushing piece so as to adjust the inclination angle of the spraying box. The device aims at blowing away slurry on the trimming water needle nozzle through cleaning gas and preventing the slurry from being accumulated on the trimming water needle nozzle.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking equipment, and in particular to a paper auxiliary trimming water needle anti-slurry accumulation and self-cleaning device. Background Art

[0002] Papermaking machines in the papermaking industry include packaging paper machines, cultural paper machines, cardboard machines, and toilet paper machines. The slurry sprayed from the wire head box can cause uneven thickness and uneven edges at both ends of the paper. Currently, high-pressure water jets are used to trim these edges to a certain size, ensuring that the paper reaches the press with a neat, trimmed edge. However, during the water jet trimming process, a small amount of slurry passing through the water jets at high speed can float up and adhere to the trimming water jet nozzles. Over time, this slurry accumulates until it falls off, causing paper breakage and serious quality issues. This also increases production costs. Utility Model Content

[0003] The present application provides a paper trimming water needle anti-slurry accumulation and self-cleaning device, which can blow away the slurry on the trimming water needle nozzle through cleaning gas and prevent the slurry from accumulating on the trimming water needle nozzle.

[0004] In the first aspect, the present application provides a paper trimming water needle anti-slurry accumulation and self-cleaning device, including an air pump, a spray box, a filter assembly and an air blowing pipeline; the spray box is provided with multiple nozzles facing the trimming water needle nozzle; the filter assembly is connected to the air pump to filter impurities in the gas output by the air pump; the outlet of the air blowing pipeline is connected to the tilted spray box, and the inlet of the air blowing pipeline is connected to the filter assembly; the air blowing pipeline is connected to a push piece, which can push the upper or lower end of the spray box to rotate through its own telescopic movement to adjust the inclination angle of the spray box.

[0005] In some embodiments, the outlet of the air blowing pipeline includes a plurality of pipe outlets, and the plurality of pipe outlets are arranged at intervals along the length direction of the spray box, and the plurality of pipe outlets are connected to the inlet of the air blowing pipeline; the paper sub-trimming water needle anti-slurry accumulation and self-cleaning device also includes a fixing member, the upper end of the spray box is rotatably connected to one end of the fixing member, the air blowing pipeline is connected to the other end of the fixing member, one end of the pushing member abuts the lower end of the spray box, and the other end of the pushing member is connected to the air blowing pipeline, and the length of the pushing member along its axial direction is adjustable so that the inclination angle of the spray box can be changed when the length of the pushing member is adjusted; the air blowing pipeline includes a first air jet pipe, a second air jet pipe, a third air jet pipe, a first wave jet pipe, a second wave jet pipe, a third wave ... bellows, a second bellows and a third bellows; the first jet pipe and the spray box are communicated with each other through the first bellows, and the first jet pipe is connected to the fixing piece; the second jet pipe and the spray box are communicated with each other through the second bellows; the third jet pipe and the spray box are communicated with each other through the third bellows, and the third jet pipe is connected to the filter assembly and is connected to the first jet pipe and the second jet pipe; the pushing piece includes a pushing rod, a threaded rod and a mounting piece, the pushing rod abuts the spray box, one end of the threaded rod is rotatably connected to the pushing rod, the other end of the threaded rod is threadedly connected to the mounting piece, and the mounting piece is connected to the third jet pipe; the first jet pipe, the second jet pipe and the third jet pipe are all provided with valves.

[0006] In some embodiments, the filter assembly includes a filter body, a filter screen, an impeller and a beating structure; the interior of the filter body is provided with a first cavity, a second cavity and a third cavity, the first cavity is connected to the blowing pipe, the second cavity and the third cavity; the filter screen is provided in the first cavity; the impeller is provided in the second cavity, the impeller is provided with a transmission shaft, a partition is provided between the second cavity and the third cavity, the transmission shaft passes through the partition and extends into the third cavity, the transmission shaft rotates and connects to the partition, the second cavity is connected to the air pump, so that the impeller can rotate after the gas output by the air pump enters the second cavity; the beating structure is provided in the third cavity and connected to the transmission shaft, for beating the filter screen; the beating structure includes a semi-circular gear, a rack, a storage spring and a spherical capsule; the semi-circular gear is provided on the transmission shaft and extends into the third cavity One end of the inner; the rack is movably arranged in the third cavity, and the rack is meshed with the plate peripheral gear; the two ends of the storage spring are respectively connected to the rack and the inner wall of the filter body; the spherical capsule is connected to the end of the rack away from the storage spring; the paper pair trimming water needle anti-slurry accumulation and self-cleaning device also includes a pushing column and an insertion rod, the spherical capsule and the rack are connected to each other through the pushing column, the pushing column is provided with a spiral groove, one end of the insertion rod is connected to the inner wall of the filter body, and the other end of the insertion rod is inserted into the spiral groove, and the outer surface of the spherical capsule is provided with a plurality of bristles; the paper pair trimming water needle anti-slurry accumulation and self-cleaning device also includes a dust collecting bin, the dust collecting bin is threadedly connected to the filter body, the dust collecting bin at least partially extends into the first cavity and is located between the filter screen and the second cavity, the dust collecting bin has a receiving interface, and the receiving interface is located below the second cavity.

[0007] Based on the paper pair trimming water needle anti-slurry accumulation and self-cleaning device of the embodiment of the present application, by setting an air blowing pipeline and a filter component, the cleaning gas can blow away the slurry on the trimming water needle nozzle, prevent the slurry from accumulating on the trimming water needle nozzle, and prevent the slurry from floating up and attaching to the trimming water needle nozzle; by adjusting the inclination angle of the spray box, the spray box can adapt to different installation environments and can be aligned with the trimming water needle nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 This is a schematic diagram of the structure of the paper auxiliary trimming water needle anti-slurry accumulation and self-cleaning device of this application;

[0010] Figure 2 This is a schematic diagram of the structure of the paper auxiliary trimming water needle anti-slurry accumulation and self-cleaning device and the trimming water needle of this application;

[0011] Figure 3 This is a schematic diagram of the main cross-sectional structure of the filter assembly of this application;

[0012] Figure 4 This is a schematic side cross-sectional structural diagram of the filter assembly of this application;

[0013] Figure 5 This is a schematic diagram of the structure of the rack, semi-circular gear, push pin and spherical capsule of this application.

[0014] Description of reference numerals:

[0015] 1. Spray box; 2. Filter assembly; 21. Filter screen; 22. First cavity; 23. Second cavity; 24. Air supply pipe; 25. Impeller; 26. Dust collection container; 27. Third cavity; 271. Rack; 2711. Push column; 2711a. Spiral groove; 2712. Storage spring; 28. Half-turn gear; 29. ​​Drive shaft; 3. Air blowing pipeline; 31. First jet pipe; 32. Second jet pipe; 33. Third jet pipe; 34. First bellows; 35. Second bellows; 36. Third bellows; 4. Fixing part; 5. Pushing part; 51. Push rod; 511. Abutment block; 52. Threaded rod; 6. Mounting part; 7. Trimming water needle nozzle; 8. Partition; 9. Spherical capsule; 91. Bristles.

[0016] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0018] See also Figures 1 to 5 The present application proposes a paper sub-trimming water needle anti-slurry accumulation and self-cleaning device, comprising an air pump, a spray box 1, a filter assembly 2 and an air blowing pipeline 3; the spray box 1 is provided with a plurality of nozzles facing the trimming water needle nozzle 7; the filter assembly 2 is connected to the air pump to filter impurities in the gas output by the air pump; the outlet of the air blowing pipeline 3 is connected to the tilted spray box 1, and the inlet of the air blowing pipeline 3 is connected to the filter assembly 2; the air blowing pipeline 3 is connected to a pushing piece 5, which can push the upper or lower end of the spray box 1 to rotate through its own telescopic movement to adjust the tilt angle of the spray box 1.

[0019] In the embodiment provided herein, when the air pump is activated, gas enters the filter assembly 2. Impurities carried by the gas are filtered out by the filter assembly 2, resulting in cleaner gas entering the air blowing line 3. Gas enters the spray box 1 through the outlet of the air blowing line 3 and is ejected from multiple nozzles on the spray box 1 toward the trimming water needle nozzle 7. This prevents the trimming water needle nozzle 7 from being adhered to by floating slurry and also blows away slurry already adhered to the trimming water needle nozzle 7, preventing slurry from accumulating on the trimming water needle nozzle. The push member 5 can be telescopically moved to rotate one end of the spray box 1 relative to the other end, i.e., the upper end of the spray box 1 can be rotated relative to the lower end, or the lower end of the spray box 1 can be rotated relative to the upper end of the spray box 1. This allows the tilt angle of the spray box 1 to be adjusted, allowing the spray box 1 to adapt to different installation environments and align with the trimming water needle nozzle 7. Specifically, the angle of the spray box 1 can be adjusted to direct the nozzles toward the trimming water needle nozzle 7 according to the site location and equipment structure.

[0020] In some embodiments of the present application, the outlet of the air blowing pipeline 3 includes multiple pipe outlets, which are arranged at intervals along the length of the spray box 1 and are all connected to the inlet of the air blowing pipeline 3. In this way, all parts of the trimming water needle nozzle 7 can be blown by the air, and the air sprayed on the trimming water needle nozzle 7 is more uniform, thereby improving the cleaning effect of the slurry accumulated on the trimming water needle nozzle 7.

[0021] In some embodiments of the present application, the paper sub-trimming water needle anti-slurry accumulation and self-cleaning device also includes a fixing part 4, the upper end of the spray box 1 is rotatably connected to one end of the fixing part 4, the air blowing pipe 3 is connected to the other end of the fixing part 4, one end of the pushing part 5 abuts the lower end of the spray box 1, and the other end of the pushing part 5 is connected to the air blowing pipe 3, and the length of the pushing part 5 along its axial direction is adjustable so that the inclination angle of the spray box 1 can be changed when the length of the pushing part 5 is adjusted.

[0022] To adjust the tilt angle of the spray box 1, the length of the pusher 5 is adjusted. As the pusher 5 extends, it pushes the lower end of the spray box 1, causing it to rotate relative to its upper end, allowing the spray box 1 to be rotated to the desired angle. The extended pusher 5 can then press against the spray box 1. The air pump is then activated, allowing air to enter the spray box 1 through the air blowing pipe 3 and be sprayed onto the trimming water needle nozzles 7.

[0023] In some embodiments of the present application, the air blowing pipeline 3 includes a first air jet 31, a second air jet 32, a third air jet 33, a first bellows 34, a second bellows 35 and a third bellows 36; the first air jet 31 and the spray box 1 are interconnected through the first bellows 34, and the first air jet 31 is connected to the fixing member 4; the second air jet 32 ​​and the spray box 1 are interconnected through the second bellows 35; the third air jet 33 and the spray box 1 are interconnected through the third bellows 36, and the third air jet 33 is connected to the filter assembly 2 and is connected to the first air jet 31 and the second air jet 32; the pushing member 5 includes a pushing rod 51, a threaded rod 52 and a mounting member 6, the pushing rod 51 abuts the spray box 1, one end of the threaded rod 52 is rotatably connected to the pushing rod 51, and the other end of the threaded rod 52 is threadedly connected to the mounting member 6, and the mounting member 6 is connected to the third air jet 33.

[0024] The second air injection pipe 32 can be located between the first air injection pipe 31 and the third air injection pipe 33, that is, the first air injection pipe 31 is located at the upper end of the spray box 1, the second air injection pipe 32 can be located in the middle of the spray box 1, and the third air injection pipe 33 is located at the lower end of the spray box 1. In this way, it can be ensured that the gas ejected from the spray box 1 can be evenly ejected onto the trimming water needle nozzle 7, blowing away the slurry attached to various parts of the trimming water needle nozzle 7.

[0025] Before starting the air pump, the tilt angle of the spray box 1 can be adjusted so that the multiple nozzles on the spray box 1 are aligned with the trimming water needle nozzles 7. By rotating the threaded rod 52, it rotates relative to the push rod 51 and gradually moves away from or closer to the mounting member 6, thereby extending or shortening the push member 5. The extension of the push member 5 forces the lower end of the spray box 1 to rotate, thereby adjusting the tilt angle of the spray box 1. When the push member 5 shortens, the lower end of the spray box 1 rotates under the action of gravity, and the push member 5 remains against the spray box 1 at the end of the shortening process. During the rotation of the lower end of the spray box 1, the first, second, and third bellows 34, 35, and 36 all bend, allowing the spray box 1 to smoothly adjust its tilt angle. The telescopic movement of the push member 5 allows the tilt angle of the spray box 1 to be varied between ten and seventy-five degrees. A rubber abutment block 511 is provided at the end of the push rod 51 near the spray box 1. The abutment block 511 is made of rubber and is designed to abut the spray box 1. In this way, the spray box 1 can be rotated to the desired angle first, and then the push piece 5 can be extended and retracted to make the abutment block 511 abut against the spray box 1. After the abutment block 511 abuts against the spray box 1, during the spraying process of the spray box 1, the abutment block 511 can reduce the shaking of the spray box 1 through the larger friction resistance between itself and the spray box 1.

[0026] As the tilt angle of the spray box 1 changes, the distance between the area within the spray box corresponding to each air jet pipe and the corresponding portion of the trimming water needle will change. A greater distance requires a higher jet pressure or volume, while a smaller distance requires a lower jet pressure or volume. To control the jet volume of each pipe in the air blowing pipeline 3, in some embodiments of the present application, valves are installed in the first, second, and third air jet pipes 31, 32, and 33. These valves can be used to control the jet volume output by each air jet pipe to disperse slurry adhering to various parts of the trimming water needle nozzle 7.

[0027] In some embodiments of this application, please refer to Figures 3 to 5 The filter assembly 2 includes a filter body, a filter screen 21, an impeller 25 and a beating structure. A first cavity 22, a second cavity 23 and a third cavity 27 are provided inside the filter body. The first cavity 22 is connected to the air blowing pipe 3, the second cavity 23 and the third cavity 27; the filter screen 21 is provided in the first cavity 22; the impeller 25 is provided in the second cavity 23, and the impeller 25 is provided with a transmission shaft 29. A partition plate 8 is provided between the second cavity 23 and the third cavity 27. The transmission shaft 29 passes through the partition plate 8 and extends into the third cavity 27. The transmission shaft 29 is rotatably connected to the partition plate 8. The second cavity 23 is connected to the air pump so that the impeller 25 can rotate after the gas output by the air pump enters the second cavity 23; the beating structure is provided in the third cavity 27 and connected to the transmission shaft 29 for beating the filter screen 21.

[0028] The second cavity 23 can be connected to the air pump through the air supply pipe 24. During the air supply process of the air pump, the gas will enter the second cavity 23 and rotate the impeller 25. When the impeller 25 rotates, the transmission shaft 29 will rotate. During the rotation of the transmission shaft 29, the beating structure will beat the filter screen 21, which can make the filter screen 21 shake, shake off the impurities attached to the filter screen 21, and prevent the impurities carried by the gas in the process of entering the second cavity 23 from adhering to the filter screen 21, thereby preventing the filter screen 21 from being blocked by impurities in the gas, and allowing the gas to pass through the filter screen 21 more smoothly into the blowing pipeline 3, making the gas entering the blowing pipeline 3 cleaner, and preventing impurities from being sprayed onto the base paper.

[0029] Furthermore, the hammering structure includes a semi-circular gear 28, a rack 271, a force storage spring 2712 and a spherical capsule 9; the semi-circular gear 28 is arranged at one end of the transmission shaft 29 extending into the third cavity 27; the rack 271 is movably arranged in the third cavity 27, and the rack 271 is engaged with the plate circumferential gear; the two ends of the force storage spring 2712 are respectively connected to the rack 271 and the inner wall of the filter body; the spherical capsule 9 is connected to one end of the rack 271 away from the force storage spring 2712.

[0030] When the transmission shaft 29 rotates, the semi-circular gear 28 rotates. During the rotation of the semi-circular gear 28, the force storage spring 2712 is compressed. When the semi-circular gear 28 disengages from the rack 271, the rack 271 moves toward the filter 21 with the spherical capsule 9 under the action of the elastic force of the force storage spring 2712. The spherical capsule 9 hits the filter 21, causing the filter 21 to shake. When the semi-circular gear 28 resumes engagement with the rack 271, the rack 271 and the spherical capsule 9 move away from the filter 21. In this way, during the air supply process of the air pump, the spherical capsule 9 in a filled state will reciprocally hit the filter 21, thereby increasing the shaking effect of the filter 21. Among them, the spherical capsule 9 will deform when hitting the filter 21, thereby preventing the filter 21 from being damaged when it shakes.

[0031] For further information, see Figure 5 The paper pair trimming water needle anti-slurry accumulation and self-cleaning device also includes a push column 2711 and an insertion rod. The spherical capsule 9 and the rack 271 are connected to each other through the push column 2711. The push column 2711 is provided with a spiral groove 2711a. One end of the insertion rod is connected to the inner wall of the filter body, and the other end of the insertion rod is inserted into the spiral groove 2711a. The outer surface of the spherical capsule 9 is provided with a plurality of bristles.

[0032] When the rack 271 moves toward the filter 21 with the push pin 2711, the insertion rod always remains inserted into the spiral groove 2711a, which can realize the rotation of the push pin 2711, and then the spherical capsule 9 can rotate. The spherical capsule 9 will rotate and hit the filter 21, and the bristles will clean the impurities on the filter 21, which can further improve the anti-clogging effect of the filter 21 and improve the cleanliness of the gas entering the blowing pipe 3.

[0033] In order to collect impurities shaken off the filter 21 or impurities carried by the gas supplied by the air pump, in some embodiments of the present application, the paper-sub-trimming water needle anti-slurry accumulation and self-cleaning device further includes a dust collection barrel 26. The dust collection barrel 26 is threadedly connected to the filter body. The dust collection barrel 26 at least partially extends into the first cavity 22 and is located between the filter 21 and the second cavity 23. The dust collection barrel 26 has a receiving port, which is located below the second cavity 23. In this way, impurities will enter the dust collection barrel 26 through the receiving port. When the impurities in the dust collection barrel 26 need to be discarded, the dust collection barrel 26 can be rotated and removed.

[0034] Working Principle: Before starting the air pump, adjust the tilt angle of the spray box 1 so that the multiple nozzles on the spray box 1 are aligned with the trimming water needle nozzle 7. By rotating the threaded rod 52, the threaded rod 52 will rotate relative to the push rod 51 and gradually move away from or closer to the mounting member 6, thereby extending or shortening the push member 5. The extension of the push member 5 pushes the lower end of the spray box 1 to rotate, thereby adjusting the tilt angle of the spray box 1. When the air pump is started, gas enters the filter assembly 2, where impurities carried by the gas are filtered out, resulting in cleaner gas entering the air blowing line 3. The gas enters the spray box 1 through the outlet of the air blowing line 3 and is ejected from the multiple nozzles on the spray box 1 toward the trimming water needle nozzle 7. This prevents the trimming water needle nozzle 7 from being adhered to by floating slurry and also disperses any slurry already adhering to the trimming water needle nozzle 7, preventing slurry from accumulating on the trimming water needle nozzle.

[0035] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A paper trimming water needle anti-slurry accumulation and self-cleaning device, characterized in that: include: air pump; A spray box (1) is provided with a plurality of nozzles directed toward the trimming water needle nozzle (7); a filter assembly (2), connected to the air pump, for filtering impurities in the gas output by the air pump; and The outlet of the air blowing pipe (3) is connected to the tilted spray box (1), and the inlet of the air blowing pipe (3) is connected to the filter assembly (2); the air blowing pipe (3) is connected to a push piece (5), and the push piece (5) can push the upper end or lower end of the spray box (1) to rotate through its own telescopic movement to adjust the tilt angle of the spray box (1).

2. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 1, characterized in that: The outlet of the air blowing pipeline (3) comprises a plurality of pipe outlets, and the plurality of pipe outlets are arranged at intervals along the length direction of the spray box (1), and the plurality of pipe outlets are all connected to the inlet of the air blowing pipeline (3).

3. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 1, characterized in that: The invention also includes a fixing member (4), the upper end of the spray box (1) is rotatably connected to one end of the fixing member (4), the air blowing pipeline (3) is connected to the other end of the fixing member (4), one end of the pushing member (5) abuts the lower end of the spray box (1), and the other end of the pushing member (5) is connected to the air blowing pipeline (3), and the length of the pushing member (5) along its axial direction is adjustable so that the inclination angle of the spray box (1) can be changed when the length of the pushing member (5) is adjusted.

4. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 3, characterized in that: The air blowing pipeline (3) comprises a first air jet pipe (31), a second air jet pipe (32), a third air jet pipe (33), a first bellows (34), a second bellows (35) and a third bellows (36); The first air injection pipe (31) and the spray box (1) are in communication with each other via the first bellows (34), and the first air injection pipe (31) is connected to the fixing member (4); The second air injection pipe (32) and the spray box (1) are in communication with each other via the second bellows (35); The third air injection pipe (33) and the spray box (1) are in communication with each other via the third bellows (36), and the third air injection pipe (33) is in communication with the filter assembly (2) and is in communication with the first air injection pipe (31) and the second air injection pipe (32); The pushing member (5) includes a pushing rod (51), a threaded rod and a mounting member (6), wherein the pushing rod (51) abuts against the spray box (1), one end of the threaded rod is rotatably connected to the pushing rod (51), and the other end of the threaded rod is threadedly connected to the mounting member (6), and the mounting member (6) is connected to the third injection pipe (33).

5. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 4, characterized in that: The first air injection pipe (31), the second air injection pipe (32) and the third air injection pipe (33) are all provided with valves.

6. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 1, characterized in that: The filter assembly (2) comprises: A filter body is provided with a first cavity (22), a second cavity (23) and a third cavity (27) therein, wherein the first cavity (22) is connected to the air blowing pipeline (3), the second cavity (23) and the third cavity (27); A filter (21) is disposed in the first cavity (22); An impeller (25) is provided in the second cavity (23), the impeller (25) is provided with a transmission shaft (29), a partition (8) is provided between the second cavity (23) and the third cavity (27), the transmission shaft (29) passes through the partition (8) and extends into the third cavity (27), the transmission shaft (29) is rotatably connected to the partition (8), the second cavity (23) is connected to the air pump, so that the impeller (25) can rotate after the gas output by the air pump enters the second cavity (23); and, A beating structure is provided in the third cavity (27) and connected to the transmission shaft (29) for beating the filter screen (21).

7. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 6, characterized in that: The hammering structure comprises: a half-circle gear (28) provided at one end of the transmission shaft (29) extending into the third cavity (27); a rack (271) movably disposed in the third cavity (27), the rack (271) being meshed with the semicircular gear (28); A force storage spring, with two ends respectively connected to the rack (271) and the inner wall of the filter body; and a spherical capsule (9), connected to one end of the rack (271) away from the force storage spring.

8. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 7, characterized in that: It also includes a push column and an insertion rod, the spherical capsule (9) and the rack (271) are connected to each other through the push column, the push column is provided with a spiral groove, one end of the insertion rod is connected to the inner wall of the filter body, and the other end of the insertion rod is inserted into the spiral groove, and the outer surface of the spherical capsule (9) is provided with a plurality of bristles (91).

9. The paper trimming water needle anti-slurry accumulation and self-cleaning device according to claim 6, characterized in that: The invention also includes a dust collecting barrel (26), wherein the dust collecting barrel (26) is threadedly connected to the filter body, and the dust collecting barrel (26) at least partially extends into the first cavity (22) and is located between the filter screen (21) and the second cavity (23). The dust collecting barrel (26) has a receiving interface, and the receiving interface is located below the second cavity (23).

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