A carding machine with cotton wool dust removal function

Abstract

The present invention discloses a cotton carding machine with a cotton lint dust removal function, comprising a frame, a cotton carding machine body, a cotton lint discharging and conveying mechanism, a plurality of beating mechanisms and a dust suction mechanism, wherein the cotton carding machine body is mounted on the frame, a dust removal cover is arranged on the frame, the dust removal cover is located at one side of the cotton carding machine body, a cotton lint inlet is provided at the lower end of the side wall of the dust removal cover close to the cotton carding machine body, a cotton lint outlet is provided at the lower end of the side wall of the dust removal cover away from the cotton carding machine body, the cotton lint discharging and conveying mechanism is arranged on the frame and located below the dust removal cover, a plurality of beating mechanisms are arranged on the inner wall of the dust removal cover, and the dust suction mechanism is arranged on the frame and located at one side of the dust removal cover. The present invention can better beat out dust and impurities in cotton lint, and timely collect and process the dust and impurities beaten out.

Description

Technical Field

[0001] The invention relates to the technical field of textile equipment, and in particular to a cotton carding machine with a cotton wool dust removal function. Background Art

[0002] A carding machine is a textile machine used to process cotton fibers and chemical fibers. Carding is a very important process in the spinning process. Carding machines will raise a lot of cotton scraps and dust during operation, and a dust suction mechanism is usually set up to remove them. In addition, in order to avoid more dust and impurities remaining on the cotton fabric after carding, dust will also be raised during the subsequent processing or transportation. Usually, a beating mechanism is set up in the carding machine, which beats the cotton fabric after carding so that the dust in the cotton can be fully raised and sucked out by the dust suction mechanism. Impurities in the cotton can also be beaten out and processed during the beating process.

[0003] However, the beating mechanism in the prior art is easy to damage the cotton fabric when beating it. The cotton fiber is thick and short, and it is very easy to break when beating it hard. The existing beating mechanism will cause the cotton fiber to break and become cotton dust during the beating process, which affects the quality of the final product. Summary of the invention

[0004] The purpose of the present invention is to provide a cotton carding machine with a cotton dust removal function, which can better beat out dust and impurities in the cotton and collect and process the beaten dust and impurities in time. At the same time, during the beating process, it can prevent the cotton fabric from being damaged by the beating, thereby improving the quality of the cotton fabric.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a cotton carding machine with a cotton fluff dust removal function, comprising a frame, a cotton carding machine body, a cotton fluff discharging and conveying mechanism, a plurality of beating mechanisms and a dust suction mechanism, the cotton carding machine body is installed on the frame, a dust removal cover is arranged on the frame, the dust removal cover is located on one side of the cotton carding machine body, a cotton fluff inlet is provided at the lower end of the side wall of the dust removal cover close to the cotton carding machine body, a cotton fluff outlet is provided at the lower end of the side wall of the dust removal cover away from the cotton carding machine body, the cotton fluff discharging and conveying mechanism is arranged on the frame and is located below the dust removal cover, a plurality of beating mechanisms are arranged on the inner wall of the dust removal cover, the dust suction mechanism is arranged on the frame and is located on one side of the dust removal cover, the cotton fluff discharging and conveying mechanism comprises a driving roller, a driven roller and a conveyor belt assembly, the driving roller and the driven roller are rotatably connected to On the frame, the conveyor belt assembly is sleeved on the active roller and the driven roller, the outer wall of the frame is provided with a driving assembly for driving the active roller to rotate, the conveyor belt assembly is a mesh structure, the conveyor belt assembly includes an elastic warp belt and an elastic weft belt, the elastic warp belt and the elastic weft belt are woven together in a plain weaving manner, and dust collection intervals are provided between adjacent elastic warp belts and adjacent elastic weft belts, the dust collection intervals are 1~10cm, a supporting net is provided in the middle of the conveyor belt assembly, a plurality of tension springs are provided on both sides of the supporting net, and one end of the plurality of tension springs away from the supporting net is fixed to the frame, the flapping mechanism includes a side posture cylinder, an elastic connecting rod and a flapping plate, the side posture cylinder is fixed to the inner wall of the dust removal hood, one end of the elastic connecting rod is fixed to the rotating part of the side posture cylinder, and the flapping plate is fixed to the end of the elastic connecting rod away from the side posture cylinder.

[0006] The present invention is further configured as follows: a plurality of the beating mechanisms are arranged at intervals along the length direction of the cotton wool discharging and conveying mechanism on the inner walls on both sides of the dust cover, and the beating mechanisms located on the inner walls on both sides of the dust cover are staggered.

[0007] The present invention is further configured as follows: the beating plate is a rubber plate, and a plurality of regularly arranged dust passage holes are formed on the beating plate.

[0008] The present invention is further configured as follows: a plurality of regularly arranged rubber airbags are provided on the lower surface of the beating board, the shape of the rubber airbags is hemispherical, and a plurality of vents penetrating into the interior of the rubber airbags are opened on the beating board.

[0009] The present invention is further configured as follows: a cleaning mechanism is arranged below the cotton wool discharging and conveying mechanism, the cleaning mechanism includes a mounting plate, a dust box, a cylinder one and a brush strip, the mounting plate is fixed on the frame, the cylinder one is fixed to the upper end of the mounting plate and the piston rod of the cylinder one is arranged vertically upward, the brush strip is arranged on the piston rod of the cylinder one, the upper end of the brush strip is in contact with the lower end of the cotton wool discharging and conveying mechanism, the dust box is arranged at the upper end of the mounting plate, and the dust box is located on the side of the cylinder one away from the cotton carding machine body.

[0010] The present invention is further configured such that the bristles on the brush strip are hard bristles.

[0011] The present invention is further configured as follows: a slide rail is provided at the upper end of the mounting plate, the length of the slide rail is the same as the length of the mounting plate, a slide groove is provided on the lower surface of the dust box along its length direction, and the slide rail is slidably connected in the slide groove, a cleaning port is provided on the side wall of the frame, and the dust box can be slid outward from the cleaning port.

[0012] The present invention is further configured as follows: a cover plate is provided on the cleaning port, and an upper end of the cover plate is hinged at a position above the cleaning port.

[0013] The present invention is further configured as follows: the dust suction mechanism includes a dust suction pipe, a collecting box and a fan, a dust suction port is opened in the middle position of the top wall of the dust hood, the dust suction port is connected to the dust suction pipe, the collecting box is arranged at one end of the dust suction pipe away from the dust suction port, and the fan is arranged on the dust suction pipe and is located on the side of the dust suction pipe close to the collecting box.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the beating mechanism is beating the cotton wool, the elastic warp belt and the elastic weft belt can buffer the cotton wool located at the upper end thereof, preventing the cotton wool from being damaged by excessive beating force during the beating process. In addition, impurities in the cotton wool that cannot be lifted up can fall downward from the dust falling interval, thereby being removed from the cotton wool. 2. The vibration process of the support net, on the one hand, protects the cotton wool, preventing the beating mechanism from causing a large impact on the cotton wool, and on the other hand, the vibration shakes off the impurities in the cotton wool, thereby improving the impurity removal effect on the cotton wool. 3. The beating mechanisms located on the inner walls on the front and rear sides of the dust hood are staggered with each other, so that the cotton wool can be beaten more evenly. 4. The dust hood can limit the dust raised during the dust removal process to the inside of the dust hood, preventing the dust from spreading into the environment and polluting the environment. 5. The fan generates suction at one end of the dust collection tube close to the dust hood, which creates negative pressure at the dust collection port, so that the dust raised in the dust collection hood is sucked into the collection box through the dust collection tube in time for collection, effectively preventing the dust diffused in the dust collection hood from re-entering the cotton wool. 6. During the rotation of the conveyor belt assembly, the brush on the brush strip can clean the elastic warp belt and the elastic weft belt, brush off the dust or impurities adhering to the elastic warp belt and the elastic weft belt, and prevent the impurities adhering to the elastic warp belt and the elastic weft belt from contaminating the subsequent cotton wool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0016] Figure 2 It is a schematic diagram of the internal structure of the frame and the dust cover of the present invention;

[0017] Figure 3 It is a partial structural schematic diagram of the conveyor belt assembly of the present invention;

[0018] Figure 4 The structure of the present invention is schematically shown Figure 2 ;

[0019] Figure 5 A top view of the present invention;

[0020] Figure 6 For the present invention Figure 5 Cross-sectional view along the G direction;

[0021] Figure 7 For the present invention Figure 2 A schematic diagram of the enlarged structure of the middle A part;

[0022] Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure of the middle B part;

[0023] Fig. 9 For the present invention Figure 4 Schematic diagram of the enlarged structure of part C in the middle.

[0024] Meaning of the numbers in the figure: 1. Frame; 2. Carding machine body; 3. Cotton discharge conveying mechanism; 4. Beating mechanism; 5. Dust suction mechanism; 6. Dust cover; 7. Cotton inlet; 8. Cotton outlet; 9. Active roller; 10. Driven roller; 11. Conveyor belt assembly; 12. Driving assembly; 13. Elastic warp belt; 14. Elastic weft belt; 15. Dust-falling interval; 16. Support net; 17. Tension spring; 18. Side cylinder; 19. Elastic connecting rod; 20. Beating plate; 21. Dust passage hole; 22. Rubber airbag; 23. Cleaning mechanism; 24. Mounting plate; 25. Dust collection box; 26. Cylinder 1; 27. Brush bar; 28. Slide rail; 29. ​​Slide groove; 30. Cover plate; 31. Dust suction pipe; 32. Collection box; 33. Fan; 34. Front side plate; 35. Rear side plate; 36. Top plate; 37. Impurity collection box; 38. Driving gear; 39. Driven gear; 40. Driving motor. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] The following references Figures 1 to 9 The present invention will be described.

[0027] A carding machine with a cotton dust removal function comprises a frame 1, a carding machine body 2, a cotton discharge conveying mechanism 3, a plurality of beating mechanisms 4 and a dust suction mechanism 5. In this embodiment, the frame 1 comprises a front side plate 34, a rear side plate 35 and a top plate 36. The top plate 36 is fixed to the upper ends of the front side plate 34 and the rear side plate 35 by bolts, and the top plate 36 is located on the right side of the upper ends of the front side plate 34 and the rear side plate 35. The carding machine body 2 is fixed to the top plate 36 by bolts, thereby ensuring the stability of the carding machine body 2. A dust cover 6 is provided on the frame 1, and the dust cover 6 is located on the left side of the carding machine body 2, and the lower end of the dust cover 6 is fixedly connected to the upper ends of the front side plate 34 and the rear side plate 35 by screws. A cotton inlet 7 is provided at the lower end of the side wall of the dust cover 6 close to the carding machine body 2, and a cotton outlet 8 is provided at the lower end of the side wall of the dust cover 6 away from the carding machine body 2. After being combed by the carding machine body 2 , the cotton fabric is transported by the cotton discharge conveying mechanism 3 to enter the dust removal cover 6 from the cotton inlet 7 for dust and impurity removal, and is transported out of the dust removal cover 6 from the cotton outlet 8 .

[0028] The dust suction mechanism 5 is located outside the dust hood, and the dust suction mechanism 5 includes a dust suction pipe 31, a collection box 32 and a fan 33. A dust suction port is provided in the middle of the top wall of the dust hood 6, and the dust suction port is connected to the dust suction pipe 31. Flanges are provided at the ends of the dust suction port and the dust suction pipe 31, and the dust suction port and the dust suction pipe 31 are fixedly connected by the flanges. The collection box 32 is provided at one end of the dust suction pipe 31 away from the dust suction port, and the fan 33 is provided on the dust suction pipe 31 and is located on the side of the dust suction pipe 31 close to the collection box 32. The dust hood can limit the dust raised during the dust removal process inside the dust hood to prevent the dust from spreading into the environment and polluting the environment. The fan 33 generates suction force at one end of the dust suction pipe 31 close to the dust hood 6, so that negative pressure is generated at the dust suction port, so that the dust raised in the dust hood is sucked into the collection box 32 in time through the dust suction pipe 31 for collection, effectively preventing the dust diffused in the dust hood 6 from re-entering the inside of the cotton wool.

[0029] The cotton discharging and conveying mechanism 3 is arranged between the front side plate 34 and the rear side plate 35, and is located below the dust cover 6. The cotton discharging and conveying mechanism 3 includes a driving roller 9, a driven roller 10 and a conveyor belt assembly 11. The two ends of the driving roller 9 and the driven roller 10 are respectively rotatably connected to the front side plate 34 and the rear side plate 35. The conveyor belt assembly 11 is sleeved on the driving roller 9 and the driven roller 10. The conveyor belt assembly 11 rotates on the driving roller 9 and the driven roller 10 following the rotation of the driving roller 9, so as to transport the cotton located at the upper end. The outer wall of the frame 1 is provided with a driving assembly 12 that drives the driving roller 9 to rotate. The driving assembly 12 includes a driving gear 38, a driven gear 39 and a driving motor 40. One end of the rotating shaft of the driving roller 9 passes through the outside of the rear side plate 35, and the driven gear 39 is fixed on the rotating shaft. A motor seat is provided on the outer wall of the rear side plate 35, and the driving motor 40 is fixed to the upper end of the motor seat by bolts. The driving gear 38 is fixed to the output shaft of the driving motor 40, and the driving gear 38 and the driven gear 39 are meshed.

[0030] The conveyor belt assembly 11 is a mesh structure, and the conveyor belt assembly 11 includes an elastic warp belt 13 and an elastic weft belt 14, and the elastic warp belt 13 and the elastic weft belt 14 are woven together in a flat weaving manner. A dust collection interval 15 is provided between adjacent elastic warp belts 13 and adjacent elastic weft belts 14, and the dust collection interval 15 is 1 to 10 cm. When the beating mechanism 4 beats the cotton wool, the elastic warp belt 13 and the elastic weft belt 14 can buffer the cotton wool located at the upper end thereof, and prevent the cotton wool from being damaged by excessive force during the beating process. In addition, impurities in the cotton wool that cannot be raised can fall downward from the dust collection interval 15, and thus be removed from the cotton wool. An impurity collection box 37 is provided below the cotton wool discharging conveying mechanism 3, and the impurity collection box 37 is located between the front side plate 34 and the rear side plate 35, and the impurity collection box 37 can collect impurities that fall downward. A support net 16 is provided in the middle of the conveyor belt assembly 11, and the support net 16 is located on one side close to the upper end of the conveyor belt assembly 11. A plurality of tension springs 17 are provided on both sides of the support net 16, and one end of the plurality of tension springs 17 away from the support net 16 is fixed to the frame 1. During the process of the beating mechanism 4 beating the cotton wool, the downward force of the conveyor belt assembly 11 acts on the support net 16, and the support net 16 can vibrate up and down under the force of the tension spring 17, so that the conveyor belt assembly 11 and the cotton wool located above the support net 16 vibrate up and down together. The vibration of the support net 16 protects the cotton wool on the one hand, preventing the beating mechanism 4 from causing a large impact on the cotton wool, and on the other hand, the vibration shakes off the impurities in the cotton wool, thereby improving the impurity removal effect on the cotton wool.

[0031] The flapping mechanism 4 is arranged on the inner wall of the dust cover 6, and a plurality of flapping mechanisms 4 are arranged at intervals along the length direction of the cotton discharging and conveying mechanism 3 on the inner walls of the front and rear sides of the dust cover 6. The flapping mechanisms 4 located on the inner walls of the front and rear sides of the dust cover 6 are arranged in an interlaced manner, so that the cotton wool can be flapped more evenly. The flapping mechanism 4 includes a side posture cylinder 18, an elastic connecting rod 19 and a flapping plate 20. The side posture cylinder 18 is fixed to the inner wall of the dust cover 6 by screws, one end of the elastic connecting rod 19 is fixed to the rotating part of the side posture cylinder 18, and the flapping plate 20 is fixed to the end of the elastic connecting rod 19 away from the side posture cylinder 18. When the side posture cylinder 18 is controlled, the elastic connecting rod 19 and the flapping plate 20 rotate together, and the flapping of the cotton wool is realized when it rotates downward. By controlling the rotation speed and rotation frequency of the rotating part of the side posture cylinder 18, the strength and frequency of the flapping of the cotton wool by the flapping plate 20 can be changed respectively. According to actual needs, the staff adjusts the working parameters of the side posture cylinder 18 so that the flapping mechanism 4 can better flap the cotton wool. The flapping plate 20 is a rubber plate, and a number of regularly arranged dust passage holes 21 are provided on the flapping plate 20. The dust passage holes 21 can allow the dust raised from the cotton wool during the flapping process to pass through, so that the dust can be better raised and sucked away by the dust suction mechanism 5. The lower surface of the flapping plate 20 is provided with a number of regularly arranged rubber airbags 22, and the shape of the rubber airbags 22 is hemispherical. The flapping plate 20 is provided with a number of vents that penetrate into the inside of the rubber airbags 22. The rubber airbags 22 can act as a buffer when in contact with the cotton wool, and the air in the rubber airbags 22 can be discharged from the vents to reduce the impact on the cotton wool. When the flapping plate 20 rotates upward, the air re-enters the rubber airbags 22 to restore the rubber airbags 22 to their original state.

[0032] A cleaning mechanism 23 is arranged below the cotton discharge conveying mechanism 3, and the cleaning mechanism 23 includes a mounting plate 24, a dust box 25, a cylinder 26 and a brush strip 27. The mounting plate 24 is arranged horizontally, and the two ends of the mounting plate 24 are respectively fixed to the inner walls of the front side plate 34 and the rear side plate 35 by screws. The cylinder 26 is fixed to the upper end of the mounting plate 24, and the piston rod of the cylinder 26 is arranged vertically upward, and the cylinder 26 is located in the middle position of the mounting plate 24. The brush strip 27 is arranged on the piston rod of the cylinder 26, and the upper end of the brush strip 27 contacts the lower end of the cotton discharge conveying mechanism 3, and the bristles on the brush strip 27 are hard bristles. The dust box 25 is arranged at the upper end of the mounting plate 24, and the dust box 25 is located on the side of the cylinder 26 away from the cotton carding machine body 2. During the rotation of the conveyor belt assembly 11, the brushes on the brush strip 27 can clean the elastic warp belt 13 and the elastic weft belt 14, and remove the dust or impurities adhering to the elastic warp belt 13 and the elastic weft belt 14, so as to prevent the impurities adhering to the elastic warp belt 13 and the elastic weft belt 14 from contaminating the subsequent cotton wool. The impurities and dust brushed off by the brushes will fall into the dust box 25 for collection.

[0033] A slide rail 28 is provided at the upper end of the mounting plate 24, and the length of the slide rail 28 is the same as that of the mounting plate 24. A slide groove 29 is provided on the lower surface of the dust box 25 along its length, and the slide rail 28 is slidably connected in the slide groove 29. A cleaning port is provided on the side wall of the frame 1, and a cover plate 30 is provided on the cleaning port, and the upper end of the cover plate 30 is hinged at the upper position of the cleaning port. The dust box 25 can be slid outward from the cleaning port and taken out. When there are a lot of impurities in the dust box 25, the staff can pull it out from the cleaning port for cleaning.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the scope of protection of the present invention.

Claims

1. A carding machine with a cotton wool dust removal function, comprising a frame (1), a carding machine body (2), a cotton wool discharging and conveying mechanism (3), a plurality of beating mechanisms (4) and a dust suction mechanism (5), wherein the carding machine body (2) is mounted on the frame (1), and is characterized in that: The frame (1) is provided with a dust cover (6), the dust cover (6) is located on one side of the carding machine body (2), a cotton wool inlet (7) is provided at the lower end of the side wall of the dust cover (6) close to the carding machine body (2), and a cotton wool outlet (8) is provided at the lower end of the side wall of the dust cover (6) away from the carding machine body (2). The cotton wool discharging and conveying mechanism (3) is provided on the frame (1) and is located below the dust cover (6), a plurality of the beating mechanisms (4) are provided on the inner wall of the dust cover (6), the dust suction mechanism (5) is provided on the frame (1) and is located on one side of the dust cover (6), and the cotton wool discharging and conveying mechanism (3) comprises a driving roller (9), a driven roller (10) and a A conveyor belt assembly (11), wherein the driving roller (9) and the driven roller (10) are rotatably connected to a frame (1), the conveyor belt assembly (11) is sleeved on the driving roller (9) and the driven roller (10), the outer wall of the frame (1) is provided with a driving assembly (12) for driving the driving roller (9) to rotate, the conveyor belt assembly (11) is a mesh structure, the conveyor belt assembly (11) comprises an elastic warp belt (13) and an elastic weft belt (14), the elastic warp belt (13) and the elastic weft belt (14) are woven together in a plain weaving manner, and dust collection intervals (15) are provided between adjacent elastic warp belts (13) and adjacent elastic weft belts (14), and the dust collection intervals (15) are 1 to 1 0cm, a support net (16) is arranged in the middle of the conveyor belt assembly (11), and a plurality of tension springs (17) are arranged on both sides of the support net (16), and the ends of the plurality of tension springs (17) away from the support net (16) are fixed on the frame (1), and the flapping mechanism (4) comprises a side posture cylinder (18), an elastic connecting rod (19) and a flapping plate (20), the side posture cylinder (18) is fixed to the inner wall of the dust cover (6), one end of the elastic connecting rod (19) is fixed to the rotating part of the side posture cylinder (18), and the flapping plate (20) is fixed to the end of the elastic connecting rod (19) away from the side posture cylinder (18), and the plurality of flapping mechanisms (4) are spaced apart along the length direction of the cotton wool discharge conveying mechanism (3). The beating mechanisms (4) are arranged at intervals on the inner walls of both sides of the dust removal cover (6), and the beating mechanisms (4) located on the inner walls of both sides of the dust removal cover (6) are arranged in a staggered manner. A cleaning mechanism (23) is arranged below the cotton wool discharging and conveying mechanism (3). The cleaning mechanism (23) includes a mounting plate (24), a dust collecting box (25), a cylinder (26) and a brush strip (27). The mounting plate (24) is fixed to the frame (1), the cylinder (26) is fixed to the upper end of the mounting plate (24) and the piston rod of the cylinder (26) is arranged vertically upward. The brush strip (27) is arranged on the piston rod of the cylinder (26), and the upper end of the brush strip (27) contacts the lower end of the cotton wool discharging and conveying mechanism (3).The dust box (25) is arranged at the upper end of the mounting plate (24), and the dust box (25) is located on the side of the cylinder 1 (26) away from the carding machine body (2).

2. A carding machine with cotton wool dust removal function according to claim 1, characterized in that: The flapping plate (20) is a rubber plate, and is provided with a plurality of regularly arranged dust passage holes (21).

3. A carding machine with cotton wool dust removal function according to claim 2, characterized in that: The lower surface of the beating plate (20) is provided with a plurality of regularly arranged rubber air bags (22), the shape of the rubber air bags (22) is hemispherical, and the beating plate (20) is provided with a plurality of ventilation holes penetrating into the interior of the rubber air bags (22).

4. A carding machine with cotton wool dust removal function according to claim 3, characterized in that: The bristles on the brush strip (27) are hard bristles.

5. A carding machine with cotton wool dust removal function according to claim 4, characterized in that: A slide rail (28) is provided at the upper end of the mounting plate (24), and the length of the slide rail (28) is the same as that of the mounting plate (24). A slide groove (29) is provided on the lower surface of the dust box (25) along its length direction, and the slide rail (28) is slidably connected in the slide groove (29). A cleaning port is provided on the side wall of the frame (1), and the dust box (25) can be slid outwardly from the cleaning port and taken out.

6. A carding machine with cotton wool dust removal function according to claim 5, characterized in that: A cover plate (30) is provided on the cleaning port, and the upper end of the cover plate (30) is hinged at a position above the cleaning port.

7. The carding machine with cotton wool dust removal function according to claim 1, characterized in that: The dust suction mechanism (5) comprises a dust suction pipe (31), a collection box (32) and a fan (33); a dust suction port is provided in the middle of the top wall of the dust removal cover (6); the dust suction port is connected to the dust suction pipe (31); the collection box (32) is arranged at one end of the dust suction pipe (31) away from the dust suction port; and the fan (33) is arranged on the dust suction pipe (31) and is located on a side of the dust suction pipe (31) close to the collection box (32).

Images