Drum-type tray seeder conveying device

Abstract

The utility model provides a drum-type tray seeder conveyer, including: delivery pipe and delivery plate, the upper end face of delivery pipe is fixedly connected with the collection box, the lower end face of delivery pipe is fixedly connected with the discharge head, and the surface of delivery pipe is fixedly connected with the air pump, servo electric cylinder, main motor and auxiliary motor respectively, and the air pump is communicated with the jet plate through the air delivery pipe, the air injection plate is fixedly connected to the top of an inner cavity of the conveying pipe, the lower surface of the conveying plate is fixedly connected with a buffer rod and a moving plate, the buffer rod is slidably connected into a through hole formed in the bottom of the inner cavity of the conveying pipe, and a rack is fixedly connected to the surface of the moving plate and meshed with an incomplete gear connected with an output shaft of a main motor. Through the cooperation of the conveying pipe, the conveying plate, the buffer rod, the spring, the moving plate, the main motor, the air injection plate and the air pump, the safety in the seed conveying process can be ensured, the seeds are prevented from being stacked at a certain place for a long time, and impurities in the seeds can be filtered in an auxiliary mode.

Description

Technical Field

[0001] The utility model relates to the technical field of sowing, in particular to a conveying device of a drum type hole tray seeder. Background Art

[0002] A seeder is a planting machine that sows crop seeds. It is a seeder used for a certain type or crop. According to the sowing method, it can be divided into: broadcast seeder, row sowing type, hole sowing type, precision sowing type and combined type. Among them, the hole sowing type is a planting machine that sows seeds in holes according to a certain row spacing and hole spacing. One or several seeds can be sown in each hole, which is called single-grain precision sowing or multi-grain hole sowing respectively. It is mainly used for row crops such as corn, cotton, beets, sunflowers, and beans. Each seeder unit can complete the entire operation process of furrowing, seeding, covering soil, and pressing. There are many types of seeding devices for hole seeders, so they must have special conveying devices for seeders. The conveying devices of seeders currently used on the market are mostly simple belts made of roller linkage. The structure is too simple, which makes it difficult to adapt to the complex sowing environment during the sowing process, resulting in the omission of grains and other phenomena.

[0003] After searching, a conveying device of a drum-type plug-disc seeder disclosed in the prior art (application number: CN201720425494.7) records in the text that "an air inlet pipe is connected to the bottom of the seed storage box, a feed pipe is connected to the bottom of the air inlet pipe, a waste tank is connected to the inner side of the feed pipe, an inclined transmission belt is provided at the bottom of the feed pipe; a supporting roller is connected to the bottom of the inclined transmission belt; a horizontal transmission belt is connected to the bottom of the inclined transmission belt, and a groove roller is connected to the bottom of the horizontal transmission belt; the supporting roller and the groove roller are directly connected to the bracket through a supporting rod; a motor is connected to the top of the bracket, a linkage shaft is provided on the shaft of the motor, a bottom transmission belt is connected to the bottom of the linkage shaft, and the two ends of the bottom transmission belt are directly connected to the inclined transmission belt and the horizontal transmission belt respectively."; The device can remove impurities from the grains dropped from the seed storage box by air selection through the air inlet pipe, and can also remove impurities from the grains dropped from the seed storage box. The grains are stored in waste tanks, and trough rollers are provided to receive the grains that fall from the inclined transmission belt. The structure drives the transmission belt through the transmission action of the motor and the linkage shaft. The filter screen provided on the top of the inclined transmission belt can filter and remove impurities from the grains that have been selected by wind again. However, the wind selection of this device cannot completely remove larger impurities, and the size of the seeds is not constant. There is also a problem of mutual adhesion between the seeds. Therefore, the filter screen is easily blocked by large-particle seeds, seed clusters or debris during actual use, which in turn affects the subsequent seed transportation. At the same time, the device constitutes a combined conveying structure through the bottom transmission belt, the inclined transmission belt and the horizontal transmission. The connection part easily increases the probability of seeds slipping, and also makes the overall structure more complicated, which is not conducive to subsequent maintenance. When the device fails, the maintenance personnel need to conduct corresponding inspections on multiple parts, thereby reducing the maintenance efficiency of the device. Utility Model Content

[0004] In order to overcome the defects of the prior art, a conveying device for a drum-type tray seeder is provided to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, a conveying device of a drum-type hole tray seeder is provided, comprising: a conveying pipe and a conveying plate, the upper surface of the conveying pipe is fixedly connected to a seed storage box and a fertilizer box respectively through a conveying pipe, and the lower surface of the conveying pipe is fixedly connected to a support frame, the upper end surface of the conveying pipe is fixedly connected to a collecting box, the lower end surface of the conveying pipe is fixedly connected to a discharging head, and the surface of the conveying pipe is respectively fixedly connected to an air pump, a servo electric cylinder, a main motor and an auxiliary motor, and the air pump is connected to an injection plate through an air conveying pipe, the injection plate is fixedly connected to the top of an inner cavity of the conveying pipe, and at the same time, a telescopic rod of the servo electric cylinder is fixedly connected to a partition plate, and the lower surface of the partition plate is slidably connected to a buffer plate through a spring, and the lower surface of the conveying plate is respectively fixedly connected to a buffer rod and a movable plate, the buffer rod is slidably connected to a through hole opened at the bottom of the inner cavity of the conveying pipe, and the surface of the movable plate is fixedly connected to a rack, and the rack is meshed with an incomplete gear connected to an output shaft of the main motor, and at the same time, a partition plate is slidably connected to the inside of the conveying pipe through a through hole, the partition plate is screwed to a transmission rod, the transmission rod is movably connected to the upper surface of the conveying plate through a bearing, and the auxiliary motor is connected to the transmission rod through a bevel gear.

[0006] Preferably, the conveying pipe is in a square cylindrical structure, the two groups of support frames symmetrically connected on the lower surface of the conveying pipe are both in an E-shaped structure, and the discharge head fixedly connected to the conveying pipe is in a prism-shaped structure, and the end of the conveying pipe close to the discharge head is inclined downward.

[0007] Preferably, a plurality of sets of through holes are provided in parallel and at equal intervals on the lower surface of the conveying tube, the sizes of the through holes and the buffer rod are matched, and the axial cross-section of the buffer rod is a T-shaped structure, and the upper end of the buffer rod is located in the conveying tube and is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the conveying plate and the conveying tube.

[0008] Preferably, the conveying plate is in the form of an elongated strip, the sizes of the conveying plate and the inner cavity of the conveying tube are matched, and the cross-section formed by the combination of the conveying plate and the buffer rod is in an E-shaped structure. At the same time, the movable plate to which the conveying plate is fixedly connected is in a rectangular structure, the surface of the movable plate is fixedly connected to the rack by a groove, and the sizes of the openings opened at the bottom of the movable plate and the conveying tube are matched.

[0009] Preferably, the partition plate is in the shape of a [-shaped structure, with buffer grooves provided on both end surfaces of the partition plate, and the buffer plate is slidably connected in the buffer groove by a spring, and the two ends of the spring are respectively fixedly connected to the top of the buffer groove and the buffer plate, and a plurality of groups of limit blocks are fixedly connected to the surface of the buffer plate in parallel and at equal intervals, and the limit blocks are slidably connected in the limit grooves corresponding to the buffer grooves, and at the same time, the main baffle is fixedly connected to the top of the inner cavity of the conveying tube near the partition plate.

[0010] Preferably, the feed pipe has a square cylindrical structure, the guide plate fixedly connected inside the feed pipe has a right triangle cross-section, and the lower surface of the guide plate is slidably connected to the upper surface of the partition plate, and the partition plate has a rectangular structure, and one end of the partition plate away from the transmission rod is fixedly connected to the buffer layer, and at the same time, a protective plate is fixedly connected to the outer side of the feed pipe near the transmission rod, and the cross-section of the protective plate has a U-shaped structure.

[0011] Preferably, the jet plate is in the shape of an elongated strip, the cross section of the jet plate is in the shape of a U-shaped structure, and a plurality of sets of jet holes are provided in parallel and at equal intervals on one side of the jet plate close to the collecting box, the end of the jet hole close to the outer side is inclined downwardly, and at the same time, the inner cavity of the collecting box is connected with the inner cavity of the conveying pipe, and the top of the inner cavity of the collecting box is fixedly connected to the auxiliary baffle, and the cross section formed by the combination of the inner cavity of the collecting box and the auxiliary baffle is in the shape of a U-shaped structure.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: through the cooperation of the conveying pipe, the conveying plate, the buffer rod, the jet plate, the air pump, the movable plate and the main motor, the conveying device can perform corresponding auxiliary filtering on the impurities mixed in the seeds, and through the periodic vibration of the conveying plate, it can not only assist in enhancing the filtering effect of the impurities in the seeds, but also enhance the fluidity of the seeds, thereby avoiding the seeds from accumulating for a long time in a certain place in the conveying device and avoiding the problem of blockage inside the conveying device. At the same time, the conveying structure of the conveying device is simple as a whole, which can effectively improve the subsequent maintenance efficiency. When the device fails, it can also assist in improving the maintenance efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0014] Figure 2 It is a partial side view schematic diagram of an embodiment of the utility model.

[0015] Figure 3 It is a partial structural schematic diagram of a partition board according to an embodiment of the utility model.

[0016] Figure 4 For the utility model embodiment Figure 1 An enlarged schematic diagram of point A.

[0017] In the figure: 1. support frame; 2. conveying pipe; 3. collecting box; 4. conveying plate; 5. conveying pipe; 6. seed storage box; 7. fertilizer box; 8. jet plate; 9. buffer rod; 10. moving plate; 11. buffer plate; 12. air pump; 13. main motor; 14. servo electric cylinder; 15. partition plate; 16. discharge head; 17. protective plate; 18. transmission rod; 19. partition plate; 20. auxiliary motor; 21. guide plate. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4 As shown, the utility model provides a conveying device of a drum-type hole tray seeder, comprising: a conveying pipe 2 and a conveying plate 4, the upper surface of the conveying pipe 2 is fixedly connected to a seed storage box 6 and a fertilizer box 7 through a conveying pipe 5, and the lower surface of the conveying pipe 2 is fixedly connected to a support frame 1, the upper end surface of the conveying pipe 2 is fixedly connected to a collecting box 3, the lower end surface of the conveying pipe 2 is fixedly connected to a discharge head 16, and the surface of the conveying pipe 2 is fixedly connected to an air pump 12, a servo electric cylinder 14, a main motor 13 and an auxiliary motor 20, respectively, and the air pump 12 is connected to an air jet plate 8 through an air pipe, and the air jet plate 8 is fixedly connected to the top of the inner cavity of the conveying pipe 2, and the servo electric cylinder 1 The telescopic rod of 4 is fixedly connected to the partition plate 15, and the lower surface of the partition plate 15 is slidably connected to the buffer plate 11 through a spring. The lower surfaces of the conveying plate 4 are respectively fixedly connected to the buffer rod 9 and the movable plate 10, and the buffer rod 9 is slidably connected to the through hole opened at the bottom of the inner cavity of the conveying pipe 2, and the surface of the movable plate 10 is fixedly connected to the rack, and the rack is engaged with the incomplete gear connected to the output shaft of the main motor 13. At the same time, the partition plate 19 is slidably connected to the material conveying pipe 5 through the through hole, and the partition plate 19 is screwed to the transmission rod 18. The transmission rod 18 is movably connected to the upper surface of the conveying plate 4 through a bearing, and the auxiliary motor 20 is connected to the transmission rod 18 through a bevel gear.

[0019] In the present embodiment, during the actual use of the conveying device of the drum-type hole tray seeder, the switch of the auxiliary motor 20 is first started, and the auxiliary motor 20 periodically drives the transmission rod 18 to rotate forward and reverse through the bevel gear, and then the transmission rod 18 can push the screwed partition plate 19 to move synchronously, so that the inner cavity of the conveying pipe 5 can be periodically opened and closed, and the switch of the air pump 12 is started, and the air pump 12 injects the air flow into the jet plate 8 through the air pipe, and the air flow is sprayed into the conveying pipe 2 through the jet hole opened in the jet plate 8, and after the air flow flows into the collection box 3, it can be discharged from the exhaust port of the collection box 3, and then the switches of the servo electric cylinder 14 and the main motor 13 are started in turn, and the telescopic rod of the servo electric cylinder 14 drives the partition plate 15 to move back and forth periodically, and the incomplete gear fixedly connected to the output shaft of the main motor 13 can be periodically meshed with the rack fixedly connected to the moving plate 10, and then the moving plate 10 can periodically drive the conveying pipe 5 to rotate back and forth. The conveying plate 4 moves downward, and the corresponding spring will be squeezed during the downward movement of the conveying plate 4. Then, when the incomplete gear is not meshed with the rack, the conveying plate 4 can be reset under the action of the squeezed spring, thereby forming a periodic vibration of the conveying plate 4, and in the process of the partition plate 15 moving downward, the buffer plate 11 is always in contact with the surface of the conveying plate 4 through the spring, and then the solenoid valve of the feed pipe 5 is opened, so that the materials in the seed storage box 6 and the fertilizer box 7 can fall automatically, and the materials can fall into the conveying pipe 2 in batches under the action of the partition plate 19. In the process of the material moving in the conveying pipe 2, the flowing airflow can perform corresponding auxiliary filtering on the debris in the material, so that the material can be discharged smoothly through the discharge head 16. The setting of the partition plate 15 can avoid the problem of accidental mixing of materials in two adjacent batches, improve the accuracy of material conveying of the conveying device, and ensure that the drum-type hole tray seeder can work normally.

[0020] As a preferred embodiment, the conveying pipe 2 has a square cylindrical structure, the two groups of support frames 1 symmetrically connected on the lower surface of the conveying pipe 2 are both E-shaped structures, and the discharge head 16 fixedly connected to the conveying pipe 2 has a prism-shaped structure, and the end of the conveying pipe 2 close to the discharge head 16 is inclined downward.

[0021] In this embodiment, if Figure 1 The setting of the support frame 1 enables the conveying device to be fixedly connected to a suitable position of the drum-type tray seeder. At the same time, the structural setting of the discharge head 16 can gather the materials discharged by the conveying device accordingly to avoid excessive dispersion of the materials.

[0022] As a preferred embodiment, a plurality of sets of through holes are provided on the lower surface of the conveying pipe 2 in parallel and at equal intervals, the sizes of the through holes and the buffer rod 9 are matched, and the axial cross-section of the buffer rod 9 is a T-shaped structure, and the upper end of the buffer rod 9 is located in the conveying pipe 2 and one end is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the conveying plate 4 and the conveying pipe 2.

[0023] In this embodiment, if Figure 1 and Figure 2 The sizes of the through hole and the buffer rod 9 are matched, which can help enhance the stability of the buffer rod 9 and the conveying plate 4 when they move. Moreover, the spring sleeved on the upper end of the buffer rod 9 enables the conveying plate 4 to have a corresponding reset structure in the conveying pipe 2.

[0024] As a preferred embodiment, the conveying plate 4 is in the shape of an elongated strip, the sizes of the conveying plate 4 and the inner cavity of the conveying tube 2 are matched, and the cross-section formed by the combination of the conveying plate 4 and the buffer rod 9 is in an E-shaped structure, and the movable plate 10 fixedly connected to the conveying plate 4 is in a rectangular structure, the surface of the movable plate 10 is fixedly connected to the rack by a groove, and the size of the opening opened at the bottom of the conveying tube 2 is matched.

[0025] In this embodiment, if Figure 1 and Figure 2 The sizes of the conveying plate 4 and the inner cavity of the conveying pipe 2 are matched, which can not only help enhance the stability of the conveying plate 4 during vibration, but also help enhance the sealing of the connection between the conveying plate 4 and the conveying pipe 2, thereby preventing the material from getting stuck at the connection during transportation and reducing the probability of failure between the conveying plate 4 and the conveying pipe 2.

[0026] As a preferred embodiment, the partition plate 15 is in a [-shaped structure, and buffer grooves are opened on both end faces of the partition plate 15, and the buffer plate 11 is slidably connected in the buffer groove by a spring, and the two ends of the spring are respectively fixedly connected to the top of the buffer groove and the buffer plate 11, and the surface of the buffer plate 11 is fixedly connected with multiple groups of limit blocks at equal intervals in parallel, and the limit blocks are slidably connected in the limit grooves corresponding to the buffer grooves, and at the same time, the main baffle is fixedly connected to the top of the inner cavity of the conveying pipe 2 near the partition plate 15.

[0027] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The side surfaces of both sides of the partition plate 15 and the end surfaces of both ends of the buffer plate 11 are slidably connected to the inner side surface of the conveying pipe 2, which can assist in enhancing the interception effect of the buffer plate 11 on the material on the surface of the conveying plate 4, and then can preliminarily gather the scattered materials, and can also avoid the problem of mutual mixing of materials in two adjacent batches. At the same time, the setting of the main baffle can prevent the material from flying to the upper surface of the partition plate 15 under the vibration of the conveying plate 4, thereby avoiding unnecessary waste of materials.

[0028] As a preferred embodiment, the feed pipe 5 has a square cylindrical structure, and the guide plate 21 fixedly connected inside the feed pipe 5 has a right-angled triangle structure in cross section, and the lower surface of the guide plate 21 is slidably connected to the upper surface of the partition plate 19, and the partition plate 19 has a rectangular structure, and one end of the partition plate 19 away from the transmission rod 18 is fixedly connected to the buffer layer, and at the same time, the outer side surface of the feed pipe 5 is fixedly connected to the position close to the transmission rod 18, and the cross section of the protective plate 17 has a U-shaped structure.

[0029] In this embodiment, if Figure 1 , Figure 2 and Figure 4 The setting of the guide plate 21 can assist in guiding the direction of the falling material, and then cooperate with the movement of the partition plate 19 to achieve rapid opening and closing of the inner cavity of the conveying pipe 5. At the same time, the buffer layer is made of sponge material, which can provide corresponding protection for the squeezed material to prevent the material from being squeezed and damaged by the partition plate 19. At the same time, the setting of the protective plate 17 can improve the stability of the connection between the auxiliary motor 20 and the transmission rod 18, and reduce the probability of transmission failure. Both the main motor 13 and the auxiliary motor 20 are servo motors.

[0030] As a preferred embodiment, the jet plate 8 is in the shape of an elongated strip, the cross section of the jet plate 8 is in the shape of a U-shaped structure, and a plurality of jet holes are provided in parallel and at equal intervals on one side of the jet plate 8 close to the collecting box 3, the end of the jet hole close to the outside is inclined downward, and at the same time, the inner cavity of the collecting box 3 is connected to the inner cavity of the conveying pipe 2, and the top of the inner cavity of the collecting box 3 is fixedly connected to the auxiliary baffle, and the cross section formed by the combination of the inner cavity of the collecting box 3 and the auxiliary baffle is in the shape of a U-shaped structure.

[0031] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The setting of the jet plate 8 allows air flow in the conveying pipe 2, and then corresponding auxiliary filtering can be performed on the impurities mixed in the seeds. At the same time, the setting of the collecting box 3 can collect the impurities accordingly, which is convenient for the subsequent same treatment. The setting of the auxiliary baffle can limit the flow path of the airflow in the collecting box 3, thereby assisting in enhancing the collection effect of the collecting box 3 on the impurities.

[0032] The conveying device of the drum-type plug tray seeder of the utility model can ensure the safety of the seed conveying process and avoid the seeds from being accumulated in a certain place for a long time through the cooperation of the conveying pipe 2, the conveying plate 4, the buffer rod 9, the spring, the movable plate 10, the main motor 13, the jet plate 8 and the air pump 12, and can also assist in filtering the sundries in the seeds, thereby helping to improve the sowing effect of the drum-type plug tray seeder.

Claims

1. A conveying device for a drum type tray seeder, include: The conveying pipe (2) and the conveying plate (4), the upper surface of the conveying pipe (2) is fixedly connected to the seed storage box (6) and the fertilizer box (7) through the conveying pipe (5), and the lower surface of the conveying pipe (2) is fixedly connected to the support frame (1), characterized in that: the upper end surface of the conveying pipe (2) is fixedly connected to the collecting box (3), the lower end surface of the conveying pipe (2) is fixedly connected to the discharge head (16), and the surface of the conveying pipe (2) is respectively fixedly connected to the air pump (12), the servo electric cylinder (14), the main motor (13) and the auxiliary motor (20), and the air pump (12) is connected to the jet plate (8) through the air delivery pipe, and the jet plate (8) is fixedly connected to the top of the inner cavity of the conveying pipe (2), and the telescopic rod of the servo electric cylinder (14) is fixedly connected The conveying plate (4) is connected to a partition plate (15), the lower surface of which is slidably connected to a buffer plate (11) via a spring, the lower surface of which is respectively fixedly connected to a buffer rod (9) and a movable plate (10), the buffer rod (9) is slidably connected to a through hole provided at the bottom of the inner cavity of the conveying pipe (2), and the surface of the movable plate (10) is fixedly connected to a rack, the rack is meshed with an incomplete gear connected to the output shaft of the main motor (13), and at the same time, a partition plate (19) is slidably connected to the inside of the conveying pipe (5) via a through hole, the partition plate (19) is screwed to a transmission rod (18), the transmission rod (18) is movably connected to the upper surface of the conveying plate (4) via a bearing, and the auxiliary motor (20) is connected to the transmission rod (18) via a bevel gear.

2. A conveying device for a drum-type tray seeder according to claim 1, It is characterized in that The conveying pipe (2) has a square cylindrical structure, the two groups of support frames (1) symmetrically connected to the lower surface of the conveying pipe (2) both have an E-shaped structure, and the discharge head (16) fixedly connected to the conveying pipe (2) has a prism-shaped structure, and the end of the conveying pipe (2) close to the discharge head (16) is inclined downward.

3. A conveying device for a drum-type tray seeder according to claim 1, It is characterized in that The lower surface of the conveying pipe (2) is provided with a plurality of through holes at equal intervals in parallel, the through holes and the buffer rod (9) are matched in size, and the axial cross section of the buffer rod (9) is in a T-shaped structure, and the upper end of the buffer rod (9) is located in the conveying pipe (2) and one end is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the conveying plate (4) and the conveying pipe (2).

4. A conveying device for a drum-type tray seeder according to claim 1, It is characterized in that The conveying plate (4) is in the form of an elongated strip, the dimensions of the conveying plate (4) and the inner cavity of the conveying tube (2) are matched, and the cross-section formed by the combination of the conveying plate (4) and the buffer rod (9) is in the form of an E-shaped structure. The movable plate (10) fixedly connected to the conveying plate (4) is in the form of a rectangular structure, the surface of the movable plate (10) is fixedly connected to the rack via a groove, and the dimensions of the opening opened at the bottom of the movable plate (10) and the conveying tube (2) are matched.

5. A conveying device for a drum-type tray seeder according to claim 1, It is characterized in that The partition plate (15) is in an L-shaped structure. Buffer grooves are provided on both end faces of the partition plate (15). The buffer plate (11) is slidably connected in the buffer groove through a spring. Two ends of the spring are respectively fixedly connected to the top of the buffer groove and the buffer plate (11). A plurality of groups of limiting blocks are fixedly connected to the surface of the buffer plate (11) at equal intervals in parallel. The limiting blocks are slidably connected in the limiting grooves correspondingly provided in the buffer groove. At the same time, a main baffle is fixedly connected to the top of the inner cavity of the conveying pipe (2) near the partition plate (15).

6. The conveying device of a drum-type plug seeder according to claim 1, characterized in that the material conveying pipe (5) is in a square tube structure. The guide plate (21) fixedly connected in the material conveying pipe (5) has a right-angled triangle cross-section structure. The lower surface of the guide plate (21) is slidably connected to the upper surface of the partition plate (19). The partition plate (19) is in a rectangular structure. A buffer layer is fixedly connected to one end of the partition plate (19) away from the transmission rod (18). At the same time, a protective plate (17) is fixedly connected to the outer side surface of the material conveying pipe (5) near the transmission rod (18). The cross-section of the protective plate (17) is in a U-shaped structure.

7. The conveying device of a drum-type plug seeder according to claim 1, characterized in that the air jet plate (8) is in a strip-shaped structure. The cross-section of the air jet plate (8) is in a square structure. A plurality of groups of air jet holes are provided on one side of the air jet plate (8) close to the collection box (3) at equal intervals in parallel. One end of the air jet hole close to the outside is inclined obliquely downward. At the same time, the inner cavity of the collection box (3) is communicated with the inner cavity of the conveying pipe (2). A secondary baffle is fixedly connected to the top of the inner cavity of the collection box (3). The cross-section formed by the inner cavity of the collection box (3) and the secondary baffle together is in a concave-shaped structure.

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