Beating machine for clean papermaking

Abstract

The utility model discloses a beating machine for clean papermaking, which comprises a bottom plate, a beating cylinder is mounted on the bottom plate, a filter cylinder is rotatably arranged in the beating cylinder, a plurality of filter holes are formed in the side wall of the filter cylinder, a beating component is arranged in the filter cylinder, the lower part of the beating component is connected with the inner bottom of the filter cylinder through a connecting component, and a top cover is mounted at the top of the beating cylinder. Raw materials can be crushed and processed into paper pulp through the pulping assembly, the quality of the paper pulp is ensured, the pulping efficiency is improved, the connecting assembly is arranged, when the pulping assembly rotates, the filter cylinder is driven to rotate, and the pulped paper pulp is filtered and thrown out through the filter holes under the centrifugal action, so that the pulping efficiency is improved. And the quality of the crushed paper pulp can be separated, so that the quality of the pulped paper pulp can be ensured, and the later papermaking quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a clean papermaking beater. Background Art

[0002] Pulping, also known as beating, is the process of using mechanical action to process pulp fibers suspended in water so that they have the characteristics required for production on a papermaking machine and the paper produced can reach the expected quality. Physical methods are used to perform mechanical or fluid treatment on pulp fibers in water, so that the fibers are subjected to shear force, changing the fiber morphology and giving the pulp certain characteristics to ensure that the paper produced reaches the expected quality requirements. This process is called "beating".

[0003] The existing pulping machines have a time difference during pulping, which causes the qualified pulp to continue to be pulped inside the pulping drum, resulting in different degrees of pulp crushing in the later stage. The pulp beaten by the pulping machine will appear uneven, which will affect the quality of later papermaking.

[0004] Therefore, the applicant proposes a clean papermaking beater to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a clean papermaking beater.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A pulping machine for clean papermaking comprises a bottom plate, a pulping cylinder is installed on the bottom plate, a filter cylinder is rotatably arranged inside the pulping cylinder, a plurality of filter holes are opened on the side wall of the filter cylinder, a pulping assembly is arranged inside the filter cylinder, the lower part of the pulping assembly is connected to the bottom of the filter cylinder by a connecting assembly, and a top cover is installed on the top of the pulping cylinder.

[0008] Furthermore, the beating assembly includes a sleeve rotatably connected to the top of the top cover, the sleeve passes through the top of the top cover to the inner cavity of the beating cylinder, a connecting rod is installed at the lower part of the sleeve, a first scraper that fits the inner wall of the filter cartridge is installed at the bottom of the connecting rod, and multiple groups of second beating knives are installed on the side of the first scraper away from the inner wall of the filter cartridge. The inner wall of the sleeve is rotatably connected to a rotating shaft, and multiple groups of first beating knives are installed on the rotating shaft. The first beating knives and the second beating knives are staggered with each other, and the lower part of the rotating shaft is connected to the bottom of the filter cartridge through a connecting assembly.

[0009] Furthermore, a transmission box is installed on the top of the top cover, the top of the sleeve extends into the transmission box and is installed with a third bevel gear, the top of the rotating shaft passes through the transmission box and extends out of the transmission box to be connected to the output end of the motor, a first bevel gear is installed on the rotating shaft located in the transmission box, a second bevel gear is rotatably provided in the transmission box, and the first bevel gear and the third bevel gear are both meshed with the second bevel gear.

[0010] Furthermore, the connecting assembly includes a mounting seat installed on the bottom of the filter cartridge and a slide groove opened on both sides of the lower part of the rotating shaft, a slider is slidably provided in the slide groove, a slide rod is installed on one side of the slider, the other end of the slide rod extends out of the slide groove and is connected to the arc-shaped protrusion, an arc groove matching the arc-shaped protrusion is provided in the mounting seat, and a spring sleeved on the outer surface of the slide rod is connected between the slider and the inner wall of the slide groove.

[0011] Furthermore, a second scraper that fits the inner wall of the beating cylinder is installed at the bottom of the connecting rod.

[0012] Furthermore, the second bevel gear is rotatably connected to the inner wall of the transmission box through a rotating rod.

[0013] Furthermore, one side of the top cover is connected to a feed pipe.

[0014] Furthermore, the bottom of the beating cylinder is connected to a discharge pipe that passes through the bottom plate, and a discharge valve is provided on the discharge pipe.

[0015] Furthermore, electric telescopic rods are installed on both sides of the bottom plate, and the telescopic ends of the electric telescopic rods are connected to the bottom of the top cover.

[0016] Furthermore, an annular groove is provided at the inner bottom of the beating cylinder, and guide wheels rotatably matched with the annular groove are provided on both sides of the bottom of the filter cylinder.

[0017] Compared with the prior art, the utility model provides a clean papermaking beater, which has the following beneficial effects:

[0018] 1. The utility model can crush the raw materials and process them into pulp through the pulping component, thereby ensuring the quality of the pulp and improving the pulping efficiency. By setting a connecting component, when the pulping component rotates, the filter drum is driven to rotate at the same time, and the pulp that has been pulped is filtered through the filter holes through the centrifugal effect and thrown out, and the quality of the pulp after crushing can be separated, ensuring the quality of the pulp after pulping can be guaranteed, and ensuring the quality of the later papermaking.

[0019] 2. The utility model adds a sleeve to the rotating shaft. While the rotating shaft drives the first beating tool to rotate, the sleeve drives the first scraper and the second beating tool to rotate. The first beating tool and the second beating tool are staggered to crush and stir the raw materials, thereby improving the beating efficiency. The first scraper can effectively scrape the slurry on the inner wall of the filter cartridge to prevent the raw materials from adhering to the inner wall of the filter cartridge and clogging the filter holes, thereby improving the uniformity of crushing and stirring the raw materials, thereby meeting the use requirements and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the utility model;

[0022] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0024] Markings in the figure: 1. bottom plate; 2. beating cylinder; 3. filter cylinder; 4. filter hole; 5. beating assembly; 51. sleeve; 52. rotating shaft; 53. connecting rod; 54. first scraper; 55. first beating tool; 56. second beating tool; 57. first bevel gear; 58. second bevel gear; 59. third bevel gear; 60. second scraper; 6. connecting assembly; 61. slide groove; 62. slider; 63. slide rod; 64. arc-shaped protrusion; 65. spring; 66. mounting seat; 67. arc-shaped groove; 7. top cover; 8. transmission box; 9. motor; 10. rotating rod; 11. feed pipe; 12. discharge pipe; 13. discharge valve; 14. electric telescopic rod; 15. annular groove; 16. guide wheel; 17. support leg; 18. observation window; 19. controller. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0027] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0030] The utility model embodiment provides a cleaning papermaking beater, referring to Figures 1 to 4 , including a bottom plate 1, on which a beating drum 2 is installed, inside which a filter drum 3 is rotatably arranged, on the side wall of which a plurality of filter holes 4 are provided, inside which a beating assembly 5 is arranged, and the lower part of the beating assembly 5 is connected to the bottom of the filter drum 3 via a connecting assembly 6, and a top cover 7 is installed on the top of the beating drum 2.

[0031] Specifically, the beating cylinder 2 and the filter cylinder 3 are both cylindrical, and the height of the filter cylinder 3 is lower than the internal height of the beating cylinder 2; the beating assembly 5 and the filter cylinder 3 are separable, and when the filter cylinder 3 needs to be repaired or replaced, the top cover 7 can be opened, and the filter cylinder 3 can be taken out for repair or replacement, which is convenient to use.

[0032] Reference Figure 1 and Figure 2 In this embodiment, support legs 17 are provided on both sides of the lower part of the base plate 1 to support the base plate 1.

[0033] Preferably, the number of supporting legs 17 is 4 and they are distributed around the lower part of the base plate 1 .

[0034] Reference Figure 2 In the present embodiment, an observation window 18 is provided on the beating barrel 2 to facilitate the staff to observe the beating situation in the beating barrel 2 .

[0035] Preferably, a silicone strip is provided between the observation window 18 and the inner wall of the beating cylinder 2 to prevent the raw material from flowing out from the gap between the observation window 18 and the inner wall of the beating cylinder 2, thereby preventing the loss of the raw material.

[0036] Reference Figure 1 and Figure 3 In this embodiment, the beating assembly 5 includes a sleeve 51 rotatably connected to the top of the top cover 7, the sleeve 51 passes through the top of the top cover 7 to the inner cavity of the beating cylinder 2, a connecting rod 53 is installed at the lower part of the sleeve 51, and a first scraper 54 that fits the inner wall of the filter cylinder 3 is installed at the bottom of the connecting rod 53, which can effectively scrape the slurry on the inner wall of the filter cylinder 3 to prevent the raw materials from adhering to the inner wall of the filter cylinder 3 and clogging the filter holes 4, thereby improving the uniformity of crushing and stirring the raw materials. A plurality of groups of second beating knives 56 are installed on the side of the first scraper 54 away from the inner wall of the filter cylinder 3, the inner wall of the sleeve 51 is rotatably connected to a rotating shaft 52, and a plurality of groups of first beating knives 55 are installed on the rotating shaft 52, the first beating knives 55 and the second beating knives 56 are staggered with each other, and the lower part of the rotating shaft 52 is connected to the inner bottom of the filter cylinder 3 through a connecting assembly 6.

[0037] Specifically, the connecting rod 53 and the sleeve 51 are arranged perpendicular to each other, and the connecting rod 53 is located above the filter cartridge 3. The length of the connecting rod 53 is longer than the first beating tool 55 and the second beating tool 56 to avoid interference; the first beating tool 55 and the rotating shaft 52 are arranged perpendicular to each other; the sleeve 51 and the rotating shaft 52 are sealed and rotatably connected; the number of the first beating tool 55 and the second beating tool 56 is set according to actual conditions; the second beating tool 56 and the first scraper 54 are arranged perpendicular to each other.

[0038] Among them, refer to Figure 1 In this embodiment, a second scraper 60 is installed at the bottom of the connecting rod 53 and fits with the inner wall of the beating tube 2. It can scrape off the pulp thrown on the inner wall of the beating tube 2 to prevent the pulp from adhering to the inner wall of the beating tube 2.

[0039] Specifically, through the cooperation of the first scraper 54 and the second scraper 60, the cleaning efficiency can be improved when the beating cylinder 2 and the filter cylinder 3 are cleaned.

[0040] Reference Figure 1 and Figure 3 In this embodiment, a transmission box 8 is installed on the top of the top cover 7, the top of the sleeve 51 extends into the transmission box 8 and is installed with a third bevel gear 59, the top of the rotating shaft 52 passes through the transmission box 8, and extends out of the transmission box 8 to be connected with the output end of the motor 9, a first bevel gear 57 is installed on the rotating shaft 52 located in the transmission box 8, and a second bevel gear 58 is rotatably provided in the transmission box 8, and the first bevel gear 57 and the third bevel gear 59 are both meshed with the second bevel gear 58.

[0041] Specifically, the first bevel gear 57, the second bevel gear 58 and the third bevel gear 59 are protected by setting a transmission box 8 to prevent impurities from damaging the first bevel gear 57, the second bevel gear 58 and the third bevel gear 59; the sleeve 51 is rotationally connected to the transmission box 8; the motor 9 is vertically arranged; the shaft 52 passes through the third bevel gear 59 and extends upward out of the transmission box 8; the first bevel gear 57 and the upper part of the second bevel gear 58 are meshed with each other, and the third bevel gear 59 and the lower part of the second bevel gear 58 are meshed with each other; the second bevel gear 58 is vertically arranged, and the first bevel gear 57 and the third bevel gear 59 are horizontally arranged; the shaft 52 is rotationally connected to the transmission box 8; the rotation direction of the filter cartridge 3 is opposite to the rotation direction of the first scraper 54, which facilitates the first scraper 54 to effectively scrape the slurry on the inner wall of the filter cartridge 3, prevent the raw material from adhering to the inner wall of the filter cartridge 3, clogging the filter hole 4, and improve the uniformity of crushing and stirring the raw material.

[0042] Start the motor 9, which drives the rotating shaft 52 to rotate, and then drives the first bevel gear 57 to rotate, the first bevel gear 57 drives the second bevel gear 58 to rotate, the second bevel gear 58 drives the third bevel gear 59 to rotate, the third bevel gear 59 drives the sleeve 51 to rotate, the rotating shaft 52 drives the first beating tool 55 to rotate, and the rotating shaft 52 drives the filter cartridge 3 to rotate through the connecting assembly 6, the sleeve 51 drives the connecting rod 53 to rotate, the connecting rod 53 drives the first scraper 54 and the second scraper 60 to rotate, the first scraper 54 drives the second beating tool 56 to rotate, and the rotation directions of the first beating tool 55 and the second beating tool 56 are opposite, so that the first beating tool 55 and the second beating tool 56 are staggered to crush and stir the raw materials, thereby improving the beating efficiency.

[0043] Among them, refer to Figure 1 and Figure 3 In this embodiment, the second bevel gear 58 is rotatably connected to the inner wall of the transmission box 8 through the rotating rod 10.

[0044] Reference Figure 1 and Figure 4 In this embodiment, the connecting component 6 includes a mounting seat 66 installed on the bottom of the filter cartridge 3 and a slide groove 61 opened on both sides of the lower part of the rotating shaft 52. A slider 62 is slidably provided in the slide groove 61. A slide rod 63 is installed on one side of the slider 62. The other end of the slide rod 63 extends out of the slide groove 61 and is connected to the arc-shaped protrusion 64. An arc groove 67 matching the arc-shaped protrusion 64 is provided in the mounting seat 66. A spring 65 sleeved on the outer surface of the slide rod 63 is connected between the slider 62 and the inner wall of the slide groove 61.

[0045] Specifically, the slide bar 63 is slidably connected to the rotating shaft 52 ; the slide block 62 can move along the direction of the slide groove 61 ; inner cavities cooperating with the arc-shaped protrusions 64 are provided on both sides of the lower part of the rotating shaft 52 , and the inner cavities are communicated with the slide groove 61 .

[0046] When the filter cartridge 3 needs to be repaired or replaced, the top cover 7 can be opened upward. When opened, the rotating shaft 52 moves upward, and the arc-shaped protrusion 64 drives the sliding rod 63 and the sliding block 62 to move into the sliding groove 61 and stretch the spring 65. When the arc-shaped protrusion 64 completely enters the inner cavity of the rotating shaft 52, the rotating shaft 52 can be detached from the mounting seat 66 and separated from the filter cartridge 3, so that the filter cartridge 3 can be taken out for repair and replacement later.

[0047] Reference Figure 1 and Figure 2 In this embodiment, a feed pipe 11 is connected to one side of the top cover 7 to facilitate feeding the raw materials into the filter cartridge 3 .

[0048] Specifically, the feed pipe 11 is located directly above the filter cartridge 3 .

[0049] Reference Figure 1 and Figure 2 In this embodiment, the bottom of the beating cylinder 2 is connected to a discharge pipe 12 that passes through the bottom plate 1 , and the discharge pipe 12 is provided with a discharge valve 13 that can open or close the discharge pipe 12 .

[0050] Reference Figure 1 and Figure 2 In this embodiment, electric telescopic rods 14 are installed on both sides of the base plate 1, and the telescopic ends of the electric telescopic rods 14 are connected to the bottom of the top cover 7.

[0051] Specifically, the electric telescopic rod 14 conveniently drives the top cover 7 to move upward, thereby driving the beating assembly 5 to move upward.

[0052] Reference Figure 1 In this embodiment, an annular groove 15 is provided at the bottom of the beating cylinder 2, and guide wheels 16 rotatably matched with the annular groove 15 are provided on both sides of the bottom of the filter cylinder 3.

[0053] Specifically, the number of guide wheels 16 is 4; the guide wheels 16 are placed in the annular groove 15, and the guide wheels 16 can rotate and move in the annular groove 15, so that the filter cartridge 3 rotates;

[0054] Reference Figure 2 In this embodiment, a controller 19 is also provided on the beating cylinder 2 to control the motor 9 and the electric telescopic rod 14 to facilitate the operation of the staff.

[0055] Specifically, the controller 19 is electrically connected to the motor 9 and the electric telescopic rod 14 .

[0056] Working principle: When in use, the raw material is put into the filter cartridge 3 through the feed pipe 11, and after water is added, the motor 9 is started, and the motor 9 drives the rotating shaft 52 to rotate, and then drives the first bevel gear 57 to rotate, the first bevel gear 57 drives the second bevel gear 58 to rotate, the second bevel gear 58 drives the third bevel gear 59 to rotate, the third bevel gear 59 drives the sleeve 51 to rotate, the rotating shaft 52 drives the first beating tool 55 to rotate, and the rotating shaft 52 drives the filter cartridge 3 to rotate synchronously through the cooperation of the arc-shaped protrusion 64 and the arc-shaped groove 67, the sleeve 51 drives the connecting rod 53 to rotate, the connecting rod 53 drives the first scraper 54 and the second scraper 60 to rotate, the first scraper 54 drives the second beating tool 55 to rotate, and the first scraper 54 drives the second beating tool 55 to rotate. 6 rotates, and the first beating knife 55 and the second beating knife 56 rotate in opposite directions, so that the first beating knife 55 and the second beating knife 56 are staggered to crush and stir the raw materials, thereby improving the beating efficiency. The pulp on the inner wall of the filter cylinder 3 can be effectively scraped off by the first scraper 54 to prevent the raw materials from adhering to the inner wall of the filter cylinder 3 and clogging the filter holes 4, thereby improving the uniformity of crushing and stirring the raw materials. The pulp that has been beaten is filtered and thrown out through the filter holes 4 through the effect of centrifugation, and the quality of the pulp after crushing can be separated, ensuring that the quality of the pulp after beating can be guaranteed, ensuring the quality of the later papermaking, and the qualified pulp will be discharged from the discharge pipe 12;

[0057] When the filter cartridge 3 needs to be repaired or replaced, the electric telescopic rod 14 is started to drive the top cover 7 to move upward. When it is opened, the rotating shaft 52 will also move upward, and the arc-shaped protrusion 64 drives the sliding rod 63 and the sliding block 62 to move into the sliding groove 61 and stretch the spring 65. When the arc-shaped protrusion 64 completely enters the inner cavity of the rotating shaft 52, the rotating shaft 52 can be separated from the mounting seat 66 and separated from the filter cartridge 3, so that the filter cartridge 3 can be taken out for repair and replacement later, which is convenient for use.

[0058] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0059] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A clean papermaking beater, comprising a bottom plate (1), characterized in that: A beating cylinder (2) is installed on the bottom plate (1), a filter cylinder (3) is rotatably installed inside the beating cylinder (2), a plurality of filter holes (4) are opened on the side wall of the filter cylinder (3), a beating assembly (5) is installed inside the filter cylinder (3), the lower part of the beating assembly (5) is connected to the bottom of the filter cylinder (3) via a connecting assembly (6), and a top cover (7) is installed on the top of the beating cylinder (2).

2. The clean papermaking beater according to claim 1, characterized in that: The beating assembly (5) includes a sleeve (51) rotatably connected to the top of the top cover (7), the sleeve (51) passes through the top of the top cover (7) to the inner cavity of the beating cylinder (2), a connecting rod (53) is installed at the lower part of the sleeve (51), a first scraper (54) that fits the inner wall of the filter cylinder (3) is installed at the bottom of the connecting rod (53), a plurality of groups of second beating knives (56) are installed on the side of the first scraper (54) away from the inner wall of the filter cylinder (3), the inner wall of the sleeve (51) is rotatably connected to a rotating shaft (52), a plurality of groups of first beating knives (55) are installed on the rotating shaft (52), the first beating knives (55) and the second beating knives (56) are arranged alternately, and the lower part of the rotating shaft (52) is connected to the inner bottom of the filter cylinder (3) through a connecting assembly (6).

3. The clean papermaking beater according to claim 2, characterized in that: A transmission box (8) is installed on the top of the top cover (7); the top of the sleeve (51) extends into the transmission box (8) and is installed with a third bevel gear (59); the top of the rotating shaft (52) passes through the transmission box (8) and extends out of the transmission box (8) to be connected to the output end of the motor (9); a first bevel gear (57) is installed on the rotating shaft (52) located in the transmission box (8); a second bevel gear (58) is rotatably provided in the transmission box (8); the first bevel gear (57) and the third bevel gear (59) are both meshed with the second bevel gear (58).

4. The clean papermaking beater according to claim 2, characterized in that: The connecting assembly (6) comprises a mounting seat (66) mounted on the bottom of the filter cartridge (3) and a slide groove (61) provided on both sides of the lower part of the rotating shaft (52); a slider (62) is slidably provided in the slide groove (61); a slide rod (63) is installed on one side of the slider (62); the other end of the slide rod (63) extends out of the slide groove (61) and is connected to the arc-shaped protrusion (64); an arc-shaped groove (67) matching the arc-shaped protrusion (64) is provided in the mounting seat (66); a spring (65) sleeved on the outer surface of the slide rod (63) is connected between the slider (62) and the inner wall of the slide groove (61).

5. The clean papermaking beater according to claim 2, characterized in that: A second scraper (60) is also mounted at the bottom of the connecting rod (53) and is in contact with the inner wall of the beating cylinder (2).

6. The clean papermaking beater according to claim 3, characterized in that: The second bevel gear (58) is rotatably connected to the inner wall of the transmission box (8) via a rotating rod (10).

7. The clean papermaking beater according to claim 1, characterized in that: One side of the top cover (7) is connected to a feed pipe (11).

8. The clean papermaking beater according to claim 1, characterized in that: The bottom of the beating cylinder (2) is connected to a discharge pipe (12) that penetrates the bottom plate (1), and a discharge valve (13) is provided on the discharge pipe (12).

9. The clean papermaking beater according to claim 1, characterized in that: Electric telescopic rods (14) are installed on both sides of the bottom plate (1), and the telescopic ends of the electric telescopic rods (14) are connected to the bottom of the top cover (7).

10. The clean papermaking beater according to claim 1, characterized in that: The inner bottom of the beating cylinder (2) is provided with an annular groove (15), and the bottom sides of the filter cylinder (3) are provided with guide wheels (16) which are rotatably matched with the annular groove (15).

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