A device for self-cleaning paper scraps in a pipeline

Abstract

The present invention discloses a self-cleaning device for paper scraps in a pipeline, which relates to the technical field related to the production of toilet paper. It includes a filter screen plate arranged at the end of the pipeline, and an impeller driven by air flow power to rotate the filter screen plate is also arranged in the pipeline; the filter screen plate is divided into several filtering areas in the circumferential direction, and a scraping member is arranged in each filtering area. During the rotation stroke of the filter screen plate, each scraping member scrapes the paper scraps attached to the corresponding filtering area; during the process of the filter screen plate rotating to filter paper scraps in the present invention, each scraping member can move in the corresponding filtering area based on the gravity of the configured member set by itself, so as to scrape the paper scraps attached to the filter screen plate, so that during the working process of the filter screen plate, a relatively good filtering effect can be basically maintained all the time.

Description

Technical Field

[0001] The present invention relates to the technical field related to the production of toilet paper, and specifically to a device for self-cleaning paper scraps in a pipeline. Background Art

[0002] As is well known, toilet paper is an essential daily necessity, and its production process is as follows:

[0003] I. Raw material preparation: Using raw materials such as wood pulp and waste paper pulp for screening and pretreatment;

[0004] II. Pulp preparation: Pulping the raw materials to produce pulp, usually adopting two methods of mechanical pulping and chemical pulping, and obtaining the pulp with the required concentration after treatment;

[0005] III. Paper formation: Forming the pulp through a special device (such as a paper machine). The pulp is evenly spread on a wire mesh belt, dehydrated and pressed to form a wet paper roll. The wet paper roll is dried to remove moisture through a drying device, usually completed by using hot air or roller drying, and the dried paper is wound into a large paper roll. The large paper roll is cut according to specifications into a width and length suitable for toilet paper use. The cut paper is pressed and wound into a cylinder for subsequent packaging and use;

[0006] IV. Packaging: Packaging the roll toilet paper, including outer packaging printing, labeling and boxing;

[0007] V. Quality inspection: Conducting quality inspections at each link to ensure that the finished product meets the standards.

[0008] Among them, during the production process of toilet paper, residual paper scraps are easily generated. The paper scraps are easily blown by the air flow and enter other components of the equipment or the air along the pipeline, causing equipment operation failures and air pollution. Therefore, it is necessary to collect the residual paper scraps. The deficiency of the existing technology is that during the process of filtering and collecting the paper scraps, they are easily attached to the surface of the filter mesh plate, and after caking, the holes of the filter mesh plate are blocked. In the existing technology, this problem is avoided by regular cleaning. However, during the use of the filter mesh plate, as the paper scraps accumulate, the holes of the filter mesh plate will gradually become blocked, resulting in a poor filtering effect even before the cleaning time arrives. Summary of the Invention

[0009] The purpose of the present invention is to provide a device for self-cleaning paper scraps in a pipeline to solve the technical problems in the related technology.

[0010] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0011] A device for self-cleaning paper scraps in a pipeline, comprising a filter screen plate arranged at the end of the pipeline, and an impeller for driving the filter screen plate to rotate based on air flow power is further arranged in the pipeline; the filter screen plate is divided into several filter areas in the circumferential direction, and a scraping member is arranged in each filter area. During the rotation stroke of the filter screen plate, each scraping member scrapes the paper scraps attached to its corresponding filter area.

[0012] In the above, two adjacent filter areas are separated by a stop bar, and the stop bar is tangent to the edge of the radial cross-section of the central rotating shaft of the filter screen plate.

[0013] In the above, a shielding member is arranged between each scraping member and the central part of the filter screen plate. During the moving stroke along the direction away from the central part of the filter screen plate, the shielding member covers the part of the filter area where the paper scraps are scraped off based on the driving force of the scraping member.

[0014] In the above, an installation frame is sleeved on the outer edge of the filter screen plate, a discharge hole is arranged on the installation frame, and a sealing plate is arranged at the discharge hole, and the sealing plate is opened based on the extrusion action of the scraping member.

[0015] In the above, the scraping member includes a first telescopic plate slidably arranged between two adjacent stop bars, and a first scraping plate is arranged on each section of the first telescopic plate. The first scraping plate abuts against the surface of the filter screen plate facing the air flow direction, and the shielding member includes a first shielding cloth arranged between the first telescopic plate and the central part of the filter screen plate.

[0016] In the above, in the rotation direction of the filter screen plate, the first telescopic plate includes a first section, a second section and a third section which are sequentially inserted. The first section and the third section are respectively movably connected to two stop bars located in the same filter area. A first counterweight block is arranged to roll in the first section and the second section, and a second counterweight block is fixedly connected to the third section; during the rotation stroke of the filter screen plate, the first telescopic plate has two state changes: the first state, the first counterweight block rolls towards the second counterweight block based on the gravity action, and the third section first moves along the direction away from the central part of the filter screen plate based on the gravity of the first counterweight block and the second counterweight block; the second state, the first counterweight block moves in the direction away from the second counterweight block based on the gravity action, and the first section first moves along the direction close to the central part of the filter screen plate based on the gravity of the first counterweight block.

[0017] As described above, the first section is slidably inserted into the second section. The part of the first section inserted into the second section, together with two support rods and the second section, forms a rolling channel for the first counterweight. Under the action of their own elastic forces, the two support rods tend to move away from each other all the time. An extrusion member is provided in the second section. When the first section and the second section are fully inserted, due to the extrusion action of the extrusion member, the distance between the two support rods is shortened, and the first counterweight cannot roll in the first section; when the extrusion member withdraws the extrusion action on the two support rods, the first counterweight moves in the direction close to the second counterweight and impacts the second section to generate a vibration effect.

[0018] As described above, two notches are provided at the end of the second section away from the extrusion member. When the first section and the second section are extended to the longest, the two support rods are respectively inserted and matched with the two notches. The first counterweight disengages from the first section and moves in the direction close to the second counterweight, and impacts the second section to generate a vibration effect.

[0019] As described above, a limiting member is provided on each of the retaining strips. When any first telescopic plate's second section and third section are not fully extended to the farthest, its first section is restricted from moving in the direction away from the central part of the filter screen plate, and the third section of the subsequent first telescopic plate is restricted from moving in the direction away from the central part of the filter screen plate by the same limiting member.

[0020] As described above, the limiting member includes an elastic swing rod fixed to the retaining strip and two protrusions provided on both sides of the elastic swing rod. When the first section of any first telescopic plate is restricted from moving by one of the protrusions, the third section of the subsequent first telescopic plate is restricted from moving by the other protrusion.

[0021] The beneficial effect of the present invention is that: during the process of the filter screen plate rotating to filter paper scraps, each scraping member can move in the corresponding filtering area based on the gravity of the configured member provided thereon, so as to scrape the paper scraps attached to the filter screen plate, so that the filter screen plate can basically maintain a good filtering effect all the time during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic overall planar structure diagram of a device for self-cleaning paper scraps in a pipeline provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic overall radial sectional structure diagram of a device for self-cleaning paper scraps in a pipeline provided by an embodiment of the present invention;

[0025] Figure 3 Schematic cross-sectional structure diagram when the first telescopic plate of a paper scraps self-cleaning device provided by an embodiment of the present invention is completely shortened;

[0026] Figure 4 For Figure 3 Enlarged structure diagram at position A in

[0027] Figure 5 Schematic cross-sectional structure diagram when the first telescopic plate of a paper scraps self-cleaning device provided by an embodiment of the present invention is not completely extended;

[0028] Figure 6 For Figure 5 Enlarged structure diagram at position B in

[0029] Figure 7 Schematic cross-sectional structure diagram when the first telescopic plate of a paper scraps self-cleaning device provided by an embodiment of the present invention is completely extended;

[0030] Figure 8 Schematic plan structure diagram of a limiting member of a paper scraps self-cleaning device provided by an embodiment of the present invention;

[0031] Figure 9 Partial axial cross-sectional structure diagram of a paper scraps self-cleaning device provided by an embodiment of the present invention.

[0032] Explanation of reference numerals:

[0033] 1. Filter screen plate; 10. Stopper bar; 11. Installation frame; 12. Discharge hole; 13. Sealing plate; 14. Top block; 2. Scraping member; 20. First telescopic plate; 200. First section; 201. Second section; 202. Third section; 203. First counterweight; 204. Second counterweight; 21. First scraper; 22. Slideway; 23. Slide block; 24. First shielding cloth; 25. Second telescopic plate; 26. Second scraper; 27. Second shielding cloth; 28. Notch; 29. Extrusion block; 30. Avoidance groove; 31. Limiting rod; 32. Limiting opening; 33. Elastic swing rod; 34. Protrusion; 35. Discharge opening. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below in conjunction with Figure 1 to Figure 9 for further detailed description.

[0035] An embodiment of the present invention provides a device for automatically cleaning paper scraps in a pipeline, which includes a filter screen plate 1 provided at the end of the pipeline. An impeller is also provided in the pipeline to drive the filter screen plate 1 to rotate based on air flow power. The filter screen plate 1 is divided into several filtering areas in the circumferential direction, and a scraping member 2 is provided in each filtering area. During the rotation stroke of the filter screen plate 1, each scraping member 2 scrapes the paper scraps attached to the corresponding filtering area.

[0036] Specifically, the size of the mesh holes on the filter screen plate 1 can be set accordingly according to the size of the paper scraps that need to be filtered out during the actual application process. The filter screen plate 1 is provided at the end of the pipeline, and the axis of the filter screen plate 1 is parallel to the horizontal direction. When the pipeline extracts the air in the paper-making workshop, the paper scraps are carried away together with the air flow. No matter where the air flow mixed with the paper scraps is discharged, it may cause air pollution or the paper scraps may enter the equipment components, resulting in problems in the operation of the equipment. Therefore, it is necessary to use the filter screen plate 1 to filter and remove the paper scraps mixed in the air in the paper-making workshop. However, during the process of filtering and collecting the paper scraps, they are easily attached to the surface of the filter screen plate 1 and cause blockage of the mesh holes after caking. In the prior art, this problem is avoided by regular cleaning. During the use of the filter screen, as the paper scraps accumulate, the mesh holes of the filter screen will gradually become blocked, resulting in a poor filtering effect even before the cleaning time arrives. To improve the filtering effect, the cleaning cycle can be shortened accordingly, but it is difficult to accurately determine the amount of paper scraps mixed in the air, and there is still a problem of poor filtering effect. Therefore, a device is needed that can automatically clean the paper scraps filtered on the filter screen plate 1 during the filtering process of the filter screen plate 1.

[0037] That is, in this embodiment, the filter screen plate 1 is rotatably provided at the end of the pipeline, and an impeller is provided in the pipeline. The impeller rotates under the push of the gas flow (the impeller is a prior art and will not be described in detail and is not shown in the figure), thereby driving the filter screen plate 1 to rotate. The filter screen plate 1 is arranged in a partitioned manner, that is, the filter screen plate 1 is evenly divided into several filtering areas in the circumferential direction, and then a scraping member 2 is separately provided at each filtering area. During the rotation of the filter screen plate 1, each filtering area first experiences the process of filtering the paper scraps in the air and then the process of the scraping member 2 cleaning the paper scraps. The scraping member 2 can be a brush, a scraping plate, etc., and the cleaning action of the paper scraps is realized through a set driving member. The scraped paper scraps will fall and accumulate at the bottom of the inner wall of the pipeline due to the action of gravity. Therefore, a cavity for accommodating the paper scraps can be provided at the bottom of the inner wall of the pipeline, and the paper scraps accumulated in the cavity can be regularly cleaned, so that the filter screen plate 1 can basically always maintain a good filtering effect.

[0038] The beneficial effects of this embodiment are as follows: During the process of the filter screen plate 1 rotating to filter paper scraps, each scraping member 2 can move within the corresponding filtering area based on the gravity of the configured member set on itself, so as to scrape the paper scraps attached to the filter screen plate 1, enabling the filter screen plate 1 to basically maintain a good filtering effect during the working process.

[0039] Preferably, two adjacent filtering areas are separated by a stop bar 10, and the stop bar 10 is tangent to the edge of the radial cross-section of the central axis of the filter screen plate 1; specifically, in the circumferential direction, the number of stop bars 10 is equivalent to the number of separated filtering areas. To minimize the shielding area of the filter screen plate 1 as much as possible and provide sufficient moving space for the scraping action of the scraping member 2, in this embodiment, two adjacent scraping members 2 share the same stop bar 10.

[0040] As can be seen from the above, although the arrangement of the stop bar 10 increases the usable area of the filter screen plate 1 and provides sufficient moving space for the scraping action of the scraping member 2, the scraping area of the scraping member 2 gradually increases during the moving process. Therefore, in order to basically scrape off the paper scraps filtered on each filtering area, the structure of the scraping member 2 should change with the change of the scraping area.

[0041] Therefore, in a preferred embodiment, the scraping member 2 includes a first telescopic plate 20 slidably arranged between two adjacent stop bars 10. Each section of the first telescopic plate 20 is provided with a first scraping plate 21, and the first scraping plate 21 abuts against the surface of the filter screen plate 1 facing the air flow direction, that is, the length of the first telescopic plate 20 can extend with the increase of the scraping area. Slideways 22 can be provided on the two stop bars 10 corresponding to each filtering area, and sliders 23 are slidably arranged in the slideways 22. Then, both ends of the first telescopic plate 20 are rotatably connected to the sliders 23 at the corresponding positions. In this way, when it is necessary to scrape the paper scraps in the filtering area, the first telescopic plate 20 can be driven by a driving member to move in a direction away from the central part of the filter screen plate 1. The driving member can be a cylinder, and the power output end of the cylinder is hinged to the first telescopic plate 20. In this way, both ends of the first telescopic plate 20 will move along the length direction of the corresponding stop bar 10 respectively, and the first scraping plates 21 arranged on each section of the first telescopic plate 20 have overlapping parts in the telescopic direction of the first telescopic plate 20. In this way, after the first telescopic plate 20 extends, multiple first scraping plates 21 cooperate with each other to basically scrape off the paper scraps in the filtering area.

[0042] After the paper scraps are scraped off, they should also be collected in a timely manner to prevent the scraped paper scraps from adhering to the filter screen 1 again. In a preferred embodiment, an installation frame 11 is sleeved on the outer edge of the filter screen 1. The installation frame 11 is rotatably connected to the filter screen 1. The installation frame 11 can be used as a connecting member to install the filter screen 1 at the end of the pipeline. A discharge hole 12 is provided on the installation frame 11. That is, the discharge hole 12 can communicate with the cavity mentioned in the foregoing embodiment. A sealing plate 13 is provided at the discharge hole 12. The sealing plate 13 is swingably arranged at the discharge hole 12 through a hinge. A torsion spring is also provided at the swing part. Due to the elastic force of the torsion spring, the sealing plate 13 has a tendency to always block the discharge hole 12. The sealing plate 13 is opened based on the extrusion action of the scraping member 2. That is, a top block 14 for extruding the sealing plate 13 is provided on the first telescopic plate 20. When the first telescopic plate 20 is fully extended and pushes the paper scraps to the discharge hole 12, the top block 14 will squeeze the sealing plate 13 to swing, so that the discharge hole 12 is opened. At this time, part of the air flow in the pipeline will enter along the discharge hole 12. In this way, while the first telescopic plate 20 pushes the paper scraps to the discharge hole 12, the air flow will also drive the paper scraps into the discharge hole 12, so as to timely clean the scraped paper scraps out of the pipeline.

[0043] During the process of scraping the paper scraps in the filtering area, there will still be air passing through, so there will be paper scraps adhering to the filter screen 1 again. Therefore, in a preferred embodiment, a shielding member is provided between each scraping member 2 and the central part of the filter screen 1. During the moving stroke in the direction away from the central part of the filter screen 1, the shielding member covers the part of the filtering area where the paper scraps are scraped off based on the driving force of the scraping member 2. That is, the shielding member includes a first shielding cloth 24 provided between the first telescopic plate 20 and the central part of the filter screen 1. During the process of the first telescopic plate 20 driving the scraper to scrape the paper scraps in the filtering area, the first shielding cloth 24 will be pulled to cover the filtering area. The first shielding cloth 24 has elasticity and can increase the covering area when acted by an external force, and the covering area shrinks when not acted by an external force. In this way, during the process of the first telescopic plate 20 resetting after scraping the paper scraps in the filtering area (moving towards the central part of the filter screen 1), the first telescopic plate 20 does not give the first shielding cloth 24 a pulling force, so the first shielding cloth 24 shrinks the covering area under the action of its own resilience, and then the filtering area can filter the air flowing in the pipeline again.

[0044] When filtering paper scraps in the air flowing in the filtering pipeline of the filter screen plate 1, the shapes of the paper scraps are irregular, and there are many situations of their attachment to the filter screen plate 1. For example, a piece of paper scrap is partially attached to the surface of the filter screen plate 1 facing the air flow direction, and part of it is in the mesh holes of the filter screen plate 1, and even part of it extends to the surface of the filter screen plate 1 facing away from the air flow direction. Then, when the first scraper 21 scrapes the paper scraps from the surface of the filter screen plate 1 facing the air flow direction, it is difficult to scrape off the parts of the paper scraps in the mesh holes and on the surface facing away from the air flow direction together. And the paper scraps are easily broken, so the parts of the paper scraps not scraped by the first scraper 21 will flow away again with the air flow, resulting in a poor filtering effect.

[0045] Therefore, in an alternative embodiment, a second telescopic plate 25 corresponding to the first telescopic plate 20, a second scraping plate 26 corresponding to the first scraping plate 21, and a second shielding cloth 27 corresponding to the first shielding cloth 24 are further provided on the side of the filter screen plate 1 facing away from the air flow direction. The second telescopic plate 25 has the same structure as the first telescopic plate 20, the second scraping plate 26 has the same structure as the first scraping plate 21, and the second shielding cloth 27 has the same structure as the first shielding cloth 24. Also, the same slider 23 is commonly connected to the first telescopic plate 20 and the second telescopic plate 25 at corresponding positions, that is, the first telescopic plate 20 and the corresponding second telescopic plate 25 move synchronously after being stressed. The first scraping plate 21 and the second scraping plate 26 are arranged in opposite directions, that is, when moving in the direction away from the central part of the filter screen plate 1, the first scraping plate 21 first shovels and cuts the paper scraps attached to the surface of the filter screen plate 1 facing the air flow direction to divide the paper scraps, and then the second scraping plate 26 shovels and pushes the paper scraps attached to the surface of the filter screen plate 1 facing away from the air flow direction to push the paper scraps (that is, the second scraping plate 26 is swingably arranged on the corresponding second telescopic plate 25, and an elastic member is provided at the swing position. The elastic force of the elastic member causes the second scraping plate 26 to always abut against the surface of the filter screen plate 1 facing away from the air flow direction. When pushing the paper scraps, the paper scraps give the second scraping plate 26 a thrust, so that the second scraping plate 26 cannot abut against the surface of the filter screen plate 1. In this way, during this process, it is difficult for the second scraping plate 26 to form shoveling and cutting of the paper scraps, but it can push. Since the second scraping plate 26 does not abut against the surface of the filter screen plate 1, the paper scraps cut by the first scraping plate 21 are easily taken out of the mesh holes when being pushed by the second scraping plate 26). When moving in the direction close to the central part of the filter screen plate 1, the second scraping plate 26 first shovels and cuts the paper scraps attached to the surface of the filter screen plate 1 facing away from the air flow direction to divide the paper scraps, and then the first scraping plate 21 shovels and pushes the paper scraps attached to the surface of the filter screen plate 1 facing the air flow direction (the arrangement manner of the first scraping plate 21 on the first telescopic plate 20 is the same as that of the second scraping plate 26 on the second telescopic plate 25, but the arrangement directions are opposite, that is, the swing directions are opposite) to push the paper scraps. Also, a discharge port 35 is provided at the center of the filter screen plate 1. The discharge port discharges the paper scraps out of the pipeline through a discharge pipe. Each filtering area is provided in a channel that can communicate with the discharge port 35, that is, when moving in the direction close to the central part of the filter screen plate 1, the first scraping plate 21 and the second scraping plate 26 will push the paper scraps on the filter screen plate 1 to the channel. When the channel is vertically aligned with the discharge port, based on the action of gravity, the paper scraps enter the discharge port.

[0046] In summary, the advantage of such a setting is that during the reciprocating movement of the first telescopic plate 20 and the second telescopic plate 25, the paper scraps attached to the filter screen plate 1 can be scraped and cleaned, which can further improve the cleaning effect of the paper scraps on the filter screen plate 1.

[0047] Preferably, in the rotation direction of the filter screen plate 1, the first telescopic plate 20 includes a first section 200, a second section 201, and a third section 202 that are sequentially inserted. The first section 200 and the third section 202 are respectively movably connected to two retaining bars 10 located in the same filtering area. A first counterweight 203 is rotatably provided in the first section 200 and the second section 201, and a second counterweight 204 is fixedly connected to the third section 202. During the rotation stroke of the filter screen plate 1, the first telescopic plate 20 has two state changes: the first state, the first counterweight 203 rolls towards the second counterweight 204 based on the action of gravity, and the third section 202 first moves in a direction away from the central part of the filter screen plate 1 based on the gravity of the first counterweight 203 and the second counterweight 204; the second state, the first counterweight 203 moves in a direction away from the second counterweight 204 based on the action of gravity, and the first section 200 first moves in a direction close to the central part of the filter screen plate 1 based on the gravity of the first counterweight 203.

[0048] Specifically, in the foregoing embodiment, the movement of the first telescopic plate 20 is driven by a cylinder. In this embodiment, another method is provided to realize the movement of the first telescopic plate 20. That is, for the two retaining bars 10 corresponding to each filtering area, in the rotation direction of the filter mesh plate 1, they can be divided into a front retaining bar 10 and a rear retaining bar 10. Then, the first section 200 of the first telescopic plate 20 is rotatably connected to the slider 23 on the rear retaining bar 10, and the third section 202 is rotatably connected to the slider 23 on the front retaining bar 10 (the second telescopic plate 25 has the same structure as the first telescopic plate 20. For the description of the first telescopic plate 20 and its attached structure, the second telescopic plate 25 is the same as the first telescopic plate 20). A rolling channel is provided in the first section 200 along the telescopic direction. The first section 200 is slidably inserted into the second section 201, and the cavity for the first section 200 to slide in the second section 201 can also be used as a rolling channel. Then, the first counterweight 203 is arranged to roll in the rolling channel. The second counterweight 204 is fixedly connected to the third section 202. During the rotation of the filter mesh plate 1, the following situations will occur to the multiple first telescopic plates 20 in the circumferential direction: First, the first telescopic plate 20 is completely shortened, and the corresponding filtering area is completely opened to filter the paper scraps in the air in the filtering pipeline. At this time, the first counterweight 203 is at one end of the first section 200 close to the rear retaining bar 10. Second, the first telescopic plate 20 is not completely extended, which is caused by the first counterweight 203 rolling in the rolling channel under the action of gravity, and the rolling direction is along the direction close to the second counterweight 204, which drives the first scraper 21 to perform a primary scraping action on the paper scraps attached to the filtering area. Third, the first telescopic plate 20 is about to be completely extended, the first counterweight 203 is at one end of the second section 201 close to the second counterweight 204, and the scraped paper scraps are sent into the discharge hole 12. Fourth, the first telescopic plate 20 is completely extended, the first counterweight 203 is at one end of the second section 201 close to the second counterweight 204, and the corresponding filtering area is completely covered by the reconsideration blocking cloth. Fifth, the first telescopic plate 20 is not completely shortened, which is caused by the first counterweight 203 rolling in the rolling channel under the action of gravity, and the rolling direction is along the direction away from the second counterweight 204, which drives the first scraper 21 to perform a secondary scraping action on the paper scraps attached to the filtering area. Sixth, the first telescopic plate 20 is about to be completely shortened, the first counterweight 203 is at one end of the first section 200 close to the rear retaining bar 10, and the scraped paper scraps are sent into the channel. During the rotation of the filter mesh plate 1, the six situations of the first telescopic plate 20 are repeated in a cycle, so as to utilize the gravity of the first counterweight 203 and the second counterweight 204 to passively drive the corresponding first scraper 21 to perform two round-trip scraping actions on the filter mesh plate 1.

[0049] Further, the first section 200 is slidably inserted into the second section 201. The part of the first section 200 inserted into the second section 201 forms a rolling channel for the first counterweight 203 in cooperation with the second section 201 by two support rods. Under the action of their own elastic force, the two support rods tend to move away from each other all the time. An extrusion member is provided in the second section 201. When the first section 200 and the second section 201 are fully inserted, due to the extrusion action of the extrusion member, the distance between the two support rods is shortened, and the first counterweight 203 cannot roll in the first section 200; when the extrusion member removes the extrusion action on the two support rods, the first counterweight 203 moves in the direction close to the second counterweight 204 and impacts the second section 201 to generate a vibration effect.

[0050] Specifically, the two support rods of the first section 200 are elastic, and under the action of their own elasticity, the two support rods tend to move away from each other. That is, when the first section 200 is inserted into the second section 201, the second section 201 will exert an extrusion effect on the two support rods of the first section 200, making the distance between the two support rods the same as the radial dimension of the first counterweight 203. In this way, the first counterweight 203 can move between the two support rods. When the first telescopic plate 20 is fully shortened, the first counterweight 203 is at one end of the first section 200 close to the rear stop bar 10. At this time, by squeezing the two support rods, the ends of the two support rods can be made to approach each other to limit the movement of the first counterweight 203 due to gravity after the first telescopic plate 20 is tilted. When the tilt angle of the first telescopic plate 20 is relatively large, the extrusion member removes the extrusion on the two support rods, so that the first counterweight 203 moves due to gravity and impacts the second section 201, causing the entire filter screen plate 1 to vibrate. This is beneficial for the paper scraps to break away from the filter screen plate 1 and can also solve the problem when the first scraper 21 encounters obstacles in scraping the paper scraps through the vibration effect.

[0051] Furthermore, two notches 28 are provided at the end of the second section 201 away from the extrusion part. When the first section 200 and the second section 201 are extended to the longest, the two support rods are respectively inserted and matched with the two notches 28. The first counterweight 203 disengages from the first section 200 and moves in the direction close to the second counterweight 204, and impacts the second section 201 to generate a vibration effect. That is, when the first section 200 and the second section 201 are not fully extended, the first counterweight 203 cannot disengage from the first section 200 and enter the second section 201. That is, there are obstacles at the ends of the two support rods to prevent the first counterweight 203 from entering the second section 201. Only when the distance between the two obstacles is greater than the radial dimension of the first counterweight 203 can the first counterweight 203 enter the second section 201 from the first section 200. Therefore, two notches 28 are provided on the second section 201, and each notch 28 corresponds to a support rod. During the process of the first section 200 and the second section 201 being fully extended, each support rod will be inserted into the corresponding notch 28. Due to the elastic force of the two support rods themselves, the distance between the two obstacles is greater than the radial dimension of the first counterweight 203. In this way, the first counterweight 203 disengages from the first section 200 and enters the second section 201, and then impacts the end of the second section 201 close to the third section 202 again, so that the filter screen plate 1 generates a second vibration, thereby further improving the cleaning effect of the paper scraps and solving the problem of the paper scraps blocking the movement of the first scraper 21.

[0052] Among them, the extrusion member includes two extrusion blocks 29 provided on the second section 201. The two extrusion blocks 29 are close to the second counterweight 204. And in the sliding direction, a spring is provided between the extrusion block 29 and the second section 201. Due to the elastic force of the spring, the extrusion block 29 has a tendency to always move away from the midline in the length direction of the second section 201. The second section 201 is inserted into the third section 202, and two avoidance grooves 30 are correspondingly provided on the third section 202. When the extrusion block 29 corresponds to the avoidance groove 30, under the elastic force of the spring, the extrusion block 29 will enter the avoidance groove 30. When the extrusion block 29 does not correspond to the avoidance groove 30, the extrusion block 29 will be squeezed by the inner wall of the third section 202 to form extrusion on the support rod. Thus, when the first telescopic plate 20 is completely shortened, the two extrusion blocks 29 correspondingly squeeze the two support rods, and the avoidance groove 30 does not correspond to the corresponding extrusion block 29. During the elongation process of the first telescopic plate 20, during the elongation process of the third section 202 and the second section 201, the avoidance groove 30 and the corresponding extrusion block 29 will gradually correspond. During the elongation process of the first section 200 and the second section 201, the extrusion block 29 and the avoidance groove 30 already correspond, and the extrusion of the extrusion block 29 on the support rod disappears. However, when the inclination angle of the first telescopic rod is difficult to provide a large impact force for the movement of the first counterweight 203, the first counterweight 203 still cannot move within the first section 200. Therefore, a limiting rod 31 is rotatably provided on the extrusion block 29. One part of the limiting rod 31 is connected to the spring, and the other part is inserted into a limiting port 32 provided on the support rod. When the inner wall of the third section 202 squeezes the extrusion block 29, the extrusion block 29 squeezes the support rod. At this time, due to the elastic force of the spring, the limiting rod 31 deflects and is inserted into the limiting port 32 on the support rod. Then, during the elongation process of the third section 202 and the second section 201, relative movement cannot be formed between the second section 201 and the first section 200. When the avoidance groove 30 on the third section 202 corresponds to the corresponding extrusion block 29, the second section 201 and the third section 202 are completely elongated. Under the elastic force of the spring, the extrusion block 29 enters the avoidance groove 30, and correspondingly, the limiting rod 31 will also withdraw from the limiting port 32. Then, the restriction between the first section 200 and the second section 201 disappears, and then the first section 200 and the second section 201 can be elongated until the support rod is inserted into the corresponding notch 28, and the first telescopic plate 20 is completely elongated.

[0053] During the shortening process of the first telescopic plate 20, since the first counterweight 203 is basically unobstructed during the movement from the position close to the second counterweight 204 to the first section 200, afterwards, due to the gravitational forces of the first counterweight 203 and the second counterweight 204, the first telescopic plate 20 is gradually shortened. During this process, whether the first section 200 and the second section 201 shorten first, or the second section 201 and the third section 202 shorten first, or the first section 200, the second section 201, and the third section 202 shorten together, it does not affect the first telescopic plate 20 from being shortened to the shortest.

[0054] Preferably, each of the baffle bars 10 is provided with a limiting member, and when the second section 201 and the third section 202 of any first telescopic plate 20 are not fully extended to the farthest point, the first section 200 is limited by the limiting member to move in a direction away from the central part of the filter screen plate 1, and the third section 202 of the subsequent first telescopic plate 20 is limited by the same limiting member to move in a direction away from the central part of the filter screen plate 1, and the limiting member includes an elastic rocker 33 fixed to the baffle bar 10 and two protrusions 34 provided on both sides of the elastic rocker 33, and when the first section 200 of any first telescopic plate 20 is limited in movement by one of the protrusions 34, the third section 202 of the subsequent first telescopic plate 20 is limited in movement by the other protrusion 34.

[0055] Specifically, in order to extend the filtration time of the filtration area, when the first telescopic plate 20 does not reach a larger tilt angle, the position of the first telescopic plate 20 should be restricted, that is, in this embodiment, an elastic swing rod 33 is provided on each baffle 10, and two protrusions 34 are provided on both sides of the elastic swing rod 33. When one of the first telescopic plates 20 cannot cross the protrusion 34 and continue to move in a direction away from the central part of the filter screen plate 1, the first telescopic plate 20 corresponding to the other protrusion 34 cannot move in a direction away from the central part of the filter screen plate 1 either, and a certain distance is provided between the elastic swing rod 33 and the two sliders 23 corresponding to the same baffle 10. When the two distances are added together, the slider 23 can cross the corresponding protrusion 34 and continue to move. When hitting the second section 201, the vibration of the first section 200 will drive the corresponding slider 23 to squeeze the corresponding protrusion 34, so that the protrusion 34 drives the elastic swing rod 33 to swing, and the elastic swing rod 33 drives the protrusion 34 on the other side to squeeze the slider 23 corresponding to the third section 202 of the rear first telescopic plate 20, so that the slider 23 corresponding to the first section 200 continues to move over the protrusion 34, and the slider 23 corresponding to the third section 202 of the rear first telescopic plate 20 can produce an extrusion effect on the corresponding protrusion 34 based on the gravity of the second counterweight block 204, so that the elastic swing rod 33 swings and makes way for the moving path, thereby extending the filtration time of the filtration area, and the first telescopic plate 20 can reach a larger inclination angle, providing a larger impact effect for the movement of the first counterweight block 203.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the protection of the present invention.

Claims

1. A paper scraps self-cleaning device in a pipeline, comprising a filter screen disposed at the end of the pipeline, characterized in that: The pipeline is also provided with an impeller which drives the filter screen to rotate based on the power of the airflow; The filter screen plate is divided into a plurality of filter areas in the circumferential direction, and a scraper is provided in each filter area. During the rotation of the filter screen plate, each scraper scrapes the paper scraps attached to the corresponding filter area. Two filter areas at adjacent positions are separated by a baffle, and the baffle is tangent to the edge of the radial section of the central rotation axis of the filter screen plate; A shielding member is provided between each of the scraping members and the central part of the filter screen plate, and in the movement in the direction away from the central part of the filter screen plate, the shielding member covers the filtering area where the paper scraps are scraped off based on the power of the scraping member; The scraper includes a first telescopic plate slidably arranged between two adjacent baffles, each section of the first telescopic plate is provided with a first scraper, the first scraper abuts against the surface of the filter screen plate facing the airflow direction, and the shielding member includes a first shielding cloth arranged between the first telescopic plate and the central part of the filter screen plate.

2. The paper scraps self-cleaning device in the pipeline according to claim 1, characterized in that: The outer edge of the filter screen plate is sleeved with a mounting frame, the mounting frame is provided with a discharge hole, a sealing plate is provided at the discharge hole, and the sealing plate is opened based on the squeezing effect of the scraper.

3. The paper scraps self-cleaning device in the pipeline according to claim 1, characterized in that: In the rotation direction of the filter screen plate, the first telescopic plate includes a first section, a second section and a third section which are sequentially plugged in, the first section and the third section are respectively movably connected to two baffles located on the same filter area, a first counterweight block is rollingly arranged in the first section and the second section, and a second counterweight block is fixedly connected to the third section; During the rotation of the filter screen plate, the first telescopic plate has two state changes: In the first state, the first counterweight rolls toward the second counterweight based on gravity, and the third section first moves away from the center of the filter screen based on the gravity of the first counterweight and the second counterweight; In the second state, the first counterweight moves away from the second counterweight due to gravity, and the first section first moves in a direction close to the center of the filter screen based on the gravity of the first counterweight.

4. The paper scraps self-cleaning device in the pipeline according to claim 3, characterized in that: The first section is slidably inserted in the second section, and the part of the first section inserted into the second section is composed of two support rods cooperating with the second section to form a rolling channel for the first counterweight block. Under the action of their own elastic force, the two support rods tend to always move away from each other. An extrusion piece is provided in the second section. When the first section and the second section are fully inserted, based on the extrusion effect of the extrusion piece, the distance between the two support rods is shortened, and the first counterweight block cannot roll in the first section; when the extrusion piece removes the extrusion effect on the two support rods, the first counterweight block moves in a direction close to the second counterweight block and hits the second section to generate a vibration effect.

5. The paper scraps self-cleaning device in the pipeline according to claim 4, characterized in that: The second section is provided with two notches at the end away from the extrusion piece. When the first section and the second section are extended to their longest, the two support rods are respectively engaged with the two notches, the first counterweight block is separated from the first section and moves in the direction close to the second counterweight block, and hits the second section to generate vibration.

6. The paper scraps self-cleaning device in a pipeline according to claim 5, characterized in that: A limiting member is provided on each of the baffles. When the second section and the third section of any first telescopic plate are not fully extended to the farthest point, the first section is limited by the limiting member to move in a direction away from the central part of the filter screen plate, and the third section of the next first telescopic plate is limited by the same limiting member to move in a direction away from the central part of the filter screen plate.

7. The paper scraps self-cleaning device in a pipeline according to claim 6, characterized in that: The limiting member includes an elastic swing rod fixedly connected to the baffle and two protrusions arranged on both sides of the elastic swing rod. When the first section of any first telescopic plate is restricted in movement by one of the protrusions, the third section of the next first telescopic plate is restricted in movement by the other protrusion.

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