Pneumatic conveying device capable of drying in grading mode

Abstract

The invention provides a pneumatic conveying device capable of drying in a grading mode, and belongs to the technical field of material drying. The pneumatic conveying device comprises an air conveying pipe, the other end of the air conveying pipe communicates with a connecting pipe, the end of the connecting pipe communicates with a communicating pipe, the communicating pipe is fixedly connected with multiple sets of fixing bases, and two sets of air heaters and hot air conveying assemblies are installed on the fixing bases; the hot air conveying assembly is used for conveying air in the two groups of air heaters into the drying tank one by one to dry materials, so that the air in the air heaters is fully heated; air entering the two sets of air heaters is heated through the two sets of air heaters, then hot air in the two sets of air heaters is conveyed into the drying tank one by one in cooperation with the hot air conveying assembly, and then it is guaranteed that the air entering the drying tank is fully heated to the preset temperature; the problem that in the prior art, material drying is affected due to the fact that air is possibly not heated thoroughly is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material drying, in particular to a pneumatic conveying device capable of graded drying. Background Art

[0002] At present, when drying materials, it is common to use wind to dry the materials to make them dry. However, in the production process, the temperature required for drying each material is different, and graded drying equipment is needed to achieve different temperatures for drying different materials.

[0003] In the prior art, graded drying at different temperatures is achieved by heating the air to different degrees through a heating rod, and the heated air is transported to the interior of a drying tank through the heating of the heating rod to heat and dry the material. However, during the air heating process, the air is always in a circulating state, and the contact time between the air and the heating rod is short. The air may not be heated to a sufficient temperature, thereby affecting the drying efficiency of the material.

[0004] To this end, we propose a pneumatic conveying device that can be dried in stages. Summary of the Invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A pneumatic conveying device capable of graded drying comprises an air delivery pipe, wherein the end of the air delivery pipe is provided with a connecting flange, the other end of the air delivery pipe is connected to a connecting pipe, the connecting pipe is connected to a first drying pipe, the end of the connecting pipe is connected to a connecting pipe, a plurality of sets of fixing seats are fixedly connected to the connecting pipe, two sets of air heaters are installed on the fixing seats, and an air intake piece is provided between the air heater and the connecting pipe; a hot air delivery component, wherein the hot air delivery component is installed on one side of the two sets of air heaters and is connected to the air heaters, the hot air delivery component is used to deliver the air in the two sets of air heaters one by one to the inside of a drying tank to dry the material, so that the air in the air heater is fully heated; a stirring component, wherein the stirring component and the hot air delivery component are arranged in cooperation with each other, and the stirring component is used to stir the air inside the air heater so that it is quickly heated to a preset temperature.

[0006] Preferably, the air heater includes a heating tube rotatably connected to the fixed seat, the two groups of heating tubes are symmetrically distributed, and the ends of the heating tubes are connected to the air outlet pipes connected to the hot air conveying assembly, a connecting block is installed in the heating tube, multiple groups of heating rods are fixedly connected to the connecting tube, and an air storage part is provided in the heating tube; the air storage part includes a sliding plate slidably connected to the heating tube, a rotating plate rotatably connected to the sliding plate, the rotating plate is slidably connected to the heating rod, and a first spring is fixedly connected between the connecting tube and the rotating plate.

[0007] Preferably, the hot air delivery component includes a first air inlet pipe and a second air inlet pipe respectively connected to the two groups of the air outlet pipes, the ends of the first air inlet pipe and the second air inlet pipe are connected to a collecting pipe, the collecting pipe is connected to the air inlet part, and a sealing cover is rotatably connected in the collecting pipe, a through hole is provided on the sealing cover, and a rotating part for driving the sealing cover to rotate is connected to the sealing cover, the two groups of the collecting pipes are respectively connected to the first air outlet head and the second air outlet head, the ends of the first air outlet head and the second air outlet head are connected to a first bent pipe, the two groups of the first bent pipes are connected by a docking pipe, and the docking pipe is connected to a second drying pipe.

[0008] Preferably, the air intake part includes an air inlet pipe connected to the connecting pipe, the end of the air inlet pipe is connected to a diversion pipe, the diversion pipe is connected to two groups of second bends, the two groups of second bends are respectively connected to the first air inlet head and the second air inlet head, the first air inlet head and the second air inlet head are respectively connected to the two groups of collecting pipes.

[0009] Preferably, the rotating member includes a rotating shaft fixedly connected to the two groups of sealing covers respectively, the rotating shaft is rotatably connected to the collecting pipe, a limiting member is provided between the rotating shaft and the collecting pipe, and a first driven wheel is fixedly connected to the rotating shaft, a first belt is transmission-connected between the two groups of the first driven wheels, a first driving wheel is transmission-connected to the first belt, the axis of the first driving wheel is fixedly connected to a connecting shaft, and the end of the connecting shaft is connected to a driving member.

[0010] Preferably, the stirring assembly includes a rotating column fixedly connected to the two groups of connecting tubes respectively, the rotating column is rotatably connected to the heating tube, and a second driven wheel is fixedly connected to the rotating column, a second belt is transmission-connected between the two groups of the second driven wheels, a second driving wheel is transmission-connected on the second belt, the second driving wheel is connected to the driving member, and a reversing member is also connected to the driving member, the reversing member is used to drive the two groups of the heating tubes to rotate, and the rotation direction is opposite to the rotation direction of the heating rod.

[0011] Preferably, the rotating member includes gear rings fixedly connected to the two groups of heating tubes respectively, a flat gear is meshed between the two groups of gear rings, and the flat gear is connected to the driving member.

[0012] Preferably, the driving member includes a fixing frame fixedly connected to the connecting pipe, a support seat fixedly connected to the fixing frame, a motor fixedly connected to the support seat, an output end of the motor fixedly connected to a driving shaft, an end of the driving shaft is connected to a transmission member, the transmission member is connected to the connecting shaft, and the driving shaft is fixedly connected to the second driving wheel and the flat gear.

[0013] Preferably, the transmission member includes a ratchet gear fixedly connected to the driving shaft, one side of the ratchet gear is rotatably connected to a rotating disk fixedly connected to the connecting shaft, a connecting column is rotatably connected to the rotating disk, a pawl meshing with the ratchet gear is fixedly connected to the connecting column, and a torsion spring fixedly connected to the rotating plate is also fixedly connected to the connecting column.

[0014] Preferably, the limiting member includes a rotating block fixedly connected to the rotating shaft, the outer side surface of the rotating block is rotatably connected to a fixed sleeve fixedly connected to the collecting pipe, a second spring is fixedly connected inside the rotating block, the end of the second spring is fixedly connected to a sliding column slidably connected to the rotating block, the end of the sliding column is rotatably connected to a ball, and a rolling groove adapted for the ball is opened on the fixed sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with two groups of air heaters, which heat the air entering the two groups of air heaters, and cooperate with the stirring component to make the air flow inside the air heater, so that the air is fully and evenly in contact with the heating rod, and the air is quickly heated to a preset temperature. Afterwards, the hot air inside the two groups of air heaters is transported one by one to the inside of the drying tank to dry the material in cooperation with the hot air conveying component, thereby ensuring that the air entering the drying tank is fully heated to the preset temperature before being transported to the inside of the drying tank to heat and dry the material, thereby solving the problem in the prior art that the air may not be thoroughly heated and affect the drying of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the heating tube of the present invention; Figure 4 This is a schematic diagram of the partial structure of the hot air delivery component of the present invention; Figure 5 This is a schematic structural diagram of the hot air delivery component of the present invention; Figure 6 This is a schematic structural diagram of the stirring assembly of the present invention; Figure 7 This is a schematic diagram of the rotating structure of the entire heating tube of the present invention; Figure 8 This is a schematic diagram of the transmission structure of the present invention; Figure 9 It is a schematic diagram of the structure of the limiting member of the present invention.

[0018] Explanation of the figure numbers: 1. Air duct; 2. Connecting flange; 3. Connecting pipe; 4. First drying pipe; 5. Connecting pipe; 6. Fixed seat; 7. Air heater; 8. Hot air delivery assembly; 9. Agitation assembly; 10. Heating pipe; 11. Connecting block; 12. Heating rod; 13. Air outlet pipe; 14. Air storage component; 15. Sliding plate; 16. Rotating plate; 17. First spring; 18. First air inlet pipe; 19. Second air inlet pipe; 20. Collecting pipe; 21. Sealing cover; 22. Through hole; 23. First air outlet head; 24. Second air outlet head; 25. First elbow; 26. Butt joint; 27. Second drying pipe; 28. Air inlet component; 29. Air inlet pipe; 30. Diverter pipe; 31. Second elbow ;32. First air inlet head;33. Second air inlet head;34. Rotating member;35. Rotating shaft;36. First driven pulley;37. First belt;38. First driving pulley;39. Connecting shaft;40. Driving member;41. Rotating column;42. Second driven pulley;43. Second belt;44. Second driving pulley;45. Reversing member;46. Flat gear;47. Gear ring;48. Fixed frame;49. Support seat;50. Motor;51. Driving shaft;52. Transmission member;53. Ratchet gear;54. Rotating disk;55. Connecting column;56. Ratchet pawl;57. Torsion spring;58. Fixed sleeve;59. Rotating block;60. Second spring;61. Sliding column;62. Ball;63. Rolling groove. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings. Example

[0020] See also Figures 1-9A pneumatic conveying device with graded drying comprises an air delivery pipe 1, a connecting flange 2 is installed at the end of the air delivery pipe 1, the other end of the air delivery pipe 1 is connected with a connecting pipe 3, the connecting pipe 3 is connected with a first drying pipe 4, the end of the connecting pipe 3 is connected with a connecting pipe 5, a plurality of fixed seats 6 are fixedly connected to the connecting pipe 5, two groups of air heaters 7 are installed on the fixed seats 6, an air intake member 28 is provided between the air heater 7 and the connecting pipe 5; the air intake member 28 comprises an air inlet pipe 29 connected with the connecting pipe 5, the end of the air inlet pipe 29 is connected with a diverter pipe 30, the diverter pipe 30 is connected with two groups of second elbows 31, and the two groups of second elbows 31 are respectively connected with the first An air inlet head 32 and a second air inlet head 33, the first air inlet head 32 and the second air inlet head 33 are respectively connected to the two groups of collecting pipes 20; a hot air conveying component 8, the hot air conveying component 8 is installed on one side of the two groups of air heaters 7, and is connected to the air heaters 7, the hot air conveying component 8 is used to convey the air in the two groups of air heaters 7 to the inside of the drying tank one by one to dry the material, so that the air in the air heaters 7 is fully heated; a stirring component 9, the stirring component 9 and the hot air conveying component 8 are cooperated with each other, and the stirring component 9 is used to stir the air inside the air heater 7 so that it is quickly heated to a preset temperature.

[0021] In the embodiment of the present invention, please refer to Figure 2 and Figure 3 The air heater 7 shown in the figure includes a heating tube 10 rotatably connected to the fixed seat 6, the two groups of heating tubes 10 are symmetrically distributed, and the ends of the heating tubes 10 are connected to the air outlet pipe 13 connected to the hot air delivery assembly 8, a connecting block 11 is installed in the heating tube 10, a plurality of groups of heating rods 12 are fixedly connected to the connecting tube 3, and an air storage member 14 is provided in the heating tube 10; the air storage member 14 includes a sliding plate 15 slidably connected to the heating tube 10, a rotating plate 16 is rotatably connected to the sliding plate 15, the rotating plate 16 is slidably connected to the heating rod 12, and a first spring 17 is fixedly connected between the connecting tube 3 and the rotating plate 16.

[0022] In the embodiment of the present invention, please refer to Figure 4 and Figure 5 The hot air conveying assembly 8 shown in the figure includes a first air inlet pipe 18 and a second air inlet pipe 19 respectively connected to the two groups of air outlet pipes 13, and the ends of the first air inlet pipe 18 and the second air inlet pipe 19 are connected with a collecting pipe 20, the collecting pipe 20 is connected with the air inlet member 28, and a sealing cover 21 is rotatably connected in the collecting pipe 20, a through hole 22 is provided on the sealing cover 21, and a rotating member 34 for driving the sealing cover 21 to rotate is connected to the sealing cover 21, the two groups of collecting pipes 20 are respectively connected with a first air outlet head 23 and a second air outlet head 24, the ends of the first air outlet head 23 and the second air outlet head 24 are connected with a first bent pipe 25, the two groups of first bent pipes 25 are connected with a docking pipe 26, and the docking pipe 26 is connected with a second drying pipe 27.

[0023] In the embodiment of the present invention, please refer to Figure 4 and Figure 5 The rotating member 34 shown in the figure includes a rotating shaft 35 fixedly connected to the two groups of sealing covers 21 respectively, the rotating shaft 35 is rotatably connected to the collecting pipe 20, a limiting member is provided between the rotating shaft 35 and the collecting pipe 20, and a first driven wheel 36 is fixedly connected to the rotating shaft 35, a first belt 37 is transmission-connected between the two groups of first driven wheels 36, a first driving wheel 38 is transmission-connected to the first belt 37, the axis of the first driving wheel 38 is fixedly connected to a connecting shaft 39, and the end of the connecting shaft 39 is connected to a driving member 40.

[0024] In the embodiment of the present invention, please refer to Figure 9 The limiting member shown in the figure includes a rotating block 59 fixedly connected to the rotating shaft 35, the outer side of the rotating block 59 is rotatably connected to a fixed sleeve 58 fixedly connected to the collecting pipe 20, a second spring 60 is fixedly connected inside the rotating block 59, the end of the second spring 60 is fixedly connected to a sliding column 61 slidably connected to the rotating block 59, the end of the sliding column 61 is rotatably connected to a ball 62, and a rolling groove 63 adapted to the ball 62 is opened on the fixed sleeve 58.

[0025] In the embodiment of the present invention, please refer to Figure 6 and Figure 7 The driving member 40 shown in the figure includes a fixing frame 48 fixedly connected to the connecting pipe 5, a support base 49 fixedly connected to the fixing frame 48, a motor 50 fixedly connected to the support base 49, an output end of the motor 50 fixedly connected to a driving shaft 51, an end of the driving shaft 51 is connected to a transmission member 52, the transmission member 52 is connected to the connecting shaft 39, and the driving shaft 51 is fixedly connected to the second driving wheel 44 and the flat gear 46.

[0026] In the embodiment of the present invention, please refer to Figure 7 and Figure 8 The transmission member 52 shown in the figure includes a ratchet gear 53 fixedly connected to the drive shaft 51, and one side of the ratchet gear 53 is rotatably connected to a rotating disk 54 fixedly connected to the connecting shaft 39. The rotating disk 54 is rotatably connected to a connecting column 55, and the connecting column 55 is fixedly connected to a pawl 56 that meshes with the ratchet gear 53. The connecting column 55 is also fixedly connected to a torsion spring 57 that is fixedly connected to the rotating plate 16.

[0027] In the embodiment of the present invention, please refer to Figure 6 and Figure 7The stirring assembly 9 shown in the figure includes a rotating column 41 fixedly connected to the two groups of connecting tubes 3 respectively, the rotating column 41 is rotatably connected to the heating tube 10, and a second driven wheel 42 is fixedly connected to the rotating column 41, a second belt 43 is transmission-connected between the two groups of second driven wheels 42, a second driving wheel 44 is transmission-connected to the second belt 43, the second driving wheel 44 is connected to the driving member 40, and a reversing member 45 is also connected to the driving member 40, and the reversing member 45 is used to drive the two groups of heating tubes 10 to rotate, and the rotation direction is opposite to the rotation direction of the heating rod 12.

[0028] In the embodiment of the present invention, please refer to Figure 6 and Figure 7 The rotating member 34 shown in the figure includes a gear ring 47 fixedly connected to the two groups of heating tubes 10 respectively, and a flat gear 46 is engaged between the two groups of gear rings 47, and the flat gear 46 is connected to the driving member 40.

[0029] During the implementation process, the connecting flange 2 is connected to a machine that generates wind power, such as a blower. The wind power will be transported to the connecting pipe 3 through the air supply pipe 1, and then transported to the first drying pipe 4 through the connecting pipe 3. The wind power is then transported to the interior of the drying tank through the first drying pipe 4 to dry the material. At this time, the wind power inside the first drying pipe 4 is the wind power at room temperature. After the wind enters the connecting pipe 3, it will be transported to the air inlet pipe 29 through the connecting pipe 5, and then transported to the inside of the diversion pipe 30 through the air inlet pipe 29. Then, the wind will be transported to the first air inlet head 32 and the second air inlet head 33 through the two sets of second curved pipes 31. At this time, one set of through holes 22 on the two sets of sealing covers 21 is connected to the second air inlet head 33, and the other set seals the first air inlet head 32 and connects it to the first air outlet head 23 (refer to Figure 4 ), at this time, after the wind enters the first air inlet head 32 and the second air inlet head 33, since the first air inlet head 32 is sealed, the wind will enter the manifold 20 connected thereto through the second air inlet head 33 and the through hole 22, and then be transported to the second air inlet pipe 19 through the action of the manifold 20. Then, through the second air inlet pipe 19, the wind enters the heating tube 10 connected to the second air inlet pipe 19, and the sliding plate 15 is squeezed by the action of the wind, so that the first spring 17 is in a compressed state. After the wind enters the interior of the heating tube 10, the heating rod 12 heats the incoming air. After the air is heated to a preset temperature, the motor 50 is reversed, and the drive shaft 51 is reversed to drive the ratchet gear 53 to rotate. At this time, the ratchet gear 53 will engage the pawl 56, so that the pawl 56 drives the rotating disk 54 to rotate. The rotation of the rotating disk 54 drives the connecting shaft 39 to rotate, and then drives the first driving wheel 38 fixedly connected thereto to rotate. The rotation of the first driving wheel 38 causes the first belt 37 to drive the two sets of first driven wheels 36 to rotate, and then drives the two sets of rotating shafts 35 to rotate. The rotation of the two sets of rotating shafts 35 causes the two sets of sealing covers 21 to rotate 180 degrees. Among them, after the two sets of sealing covers 21 rotate 180 degrees, the through hole 22 previously connected with the second air inlet head 33 will be connected with the second air outlet head 24, and the sealing cover 21 will seal the second air inlet head 33, and the through hole 22 previously connected with the first air outlet head 23 will be connected with the first air inlet head 32, and the sealing cover 21 will seal the second air inlet head 33. At this time, the sliding plate 15 and the rotating plate 16 are caused to slide by the action of the first spring 17, thereby squeezing the air inside the heating tube 10 into the second air inlet pipe 19. Through the action of the second air inlet pipe 19 and the collecting pipe 20, the wind force enters the second air outlet head 24 through the through hole 22, and is then transported to the second drying pipe 27 through the first elbow 25 and the docking pipe 26. Finally, it is transported to the inside of the drying tank for drying. At this time, the temperature of the gas entering the drying tank has been heated to a preset temperature. Furthermore, after the two sets of sealing covers 21 rotate, the interior of the heating tube 10 connected to the second air inlet pipe 19 will discharge gas. Since the sealing cover 21 seals the second air inlet head 33, the gas will enter the interior of the collecting pipe 20 connected to the first air inlet pipe 18 through the air inlet pipe 29, the diverter pipe 30, the second elbow 31, the first air inlet head 32 and the through hole 22, and then be transported to the other set of heating tubes 10 for heating through the collecting pipe 20 and the first air inlet pipe 18. After the air is heated to a suitable temperature, the gas in the heating tube 10 currently discharging gas is completely discharged. Then, the control motor 50 is reversed again to make the two sets of sealing covers 21 rotate 180 degrees again, thereby making the gas inside the two sets of heating tubes 10 be discharged one by one into the drying tank, and the two sets of heating tubes 10 collect and heat the gas at room temperature one by one. By switching the two sets of heating tubes 10 back and forth, it is ensured that the temperature of the gas entering the drying tank has reached the preset value, thereby improving the drying efficiency. Furthermore, after the state switching of the two sets of sealing covers 21 is completed, during the process of heating the gas, the motor 50 is controlled to rotate forward, so that the forward rotation of the motor 50 causes the drive shaft 51 to rotate. The second driving pulley 44 drives the second belt 43 to rotate through the action of the drive shaft 51. The second belt 43 causes the two sets of second driven pulleys 42 to rotate, thereby causing the two sets of rotating columns 41 to drive the two sets of connecting blocks 11 to rotate, thereby causing the heating rod 12 to rotate. The rotation of the heating rod 12 stirs the air entering the interior of the heating tube 10, thereby causing it to be heated quickly and evenly. It should be noted that at this time, the rotation of the motor 50 will drive the drive shaft 51 to rotate forward, and the ratchet gear 53 will rotate through the action of the drive shaft 51. In this state, the ratchet gear 53 and the pawl 56 will be disengaged, and then when the ratchet gear 53 rotates, the rotation of the rotating disk 54 will not be caused by the action of the pawl 56. Furthermore, during the driving rotation process, the flat gear 46 will also rotate, and the flat gear 46 will cause the two sets of gear rings 47 to rotate, thereby driving the heating tube 10 to rotate. The rotation of the heating tube 10 and the heating rod 12 accelerates the heating efficiency of the air. It is worth noting that the rotating plate 16 and the sliding plate 15 in this solution are rotatably connected, and the sliding plate 15 is slidably connected to the heating rod 12. Therefore, when the heating rod 12 rotates, the heating rod 12 will drive the rotating plate 16 to rotate, and will not affect the sliding plate 15 driving the rotating plate 16 to slide inside the heating tube 10.

Claims

1. A pneumatic conveying device capable of graded drying, characterized in that: include: An air delivery pipe (1), wherein a connecting flange (2) is installed at the end of the air delivery pipe (1), the other end of the air delivery pipe (1) is connected to a connecting pipe (3), the connecting pipe (3) is connected to a first drying pipe (4), the end of the connecting pipe (3) is connected to a connecting pipe (5), a plurality of fixings (6) are fixedly connected to the connecting pipe (5), two sets of air heaters (7) are installed on the fixing seat (6), and an air inlet member (28) is provided between the air heater (7) and the connecting pipe (5); A hot air conveying assembly (8), the hot air conveying assembly (8) is installed on one side of the two groups of air heaters (7) and is connected to the air heaters (7). The hot air conveying assembly (8) is used to convey the air in the two groups of air heaters (7) to the inside of the drying tank one by one to dry the material, so that the air in the air heaters (7) is fully heated; A stirring component (9), wherein the stirring component (9) and the hot air conveying component (8) are arranged in cooperation with each other, and the stirring component (9) is used to stir the air inside the air heater (7) so as to quickly heat the air to a preset temperature.

2. A pneumatic conveying device capable of graded drying according to claim 1, characterized in that: The air heater (7) includes a heating tube (10) rotatably connected to the fixed seat (6), two groups of the heating tubes (10) are symmetrically distributed, and the ends of the heating tubes (10) are connected to the air outlet pipe (13) connected to the hot air conveying assembly (8), a connecting block (11) is installed in the heating tube (10), a plurality of groups of heating rods (12) are fixedly connected to the connecting tube (3), and an air storage member (14) is provided in the heating tube (10); The gas storage member (14) includes a sliding plate (15) slidably connected to the heating tube (10), a rotating plate (16) rotatably connected to the sliding plate (15), the rotating plate (16) slidably connected to the heating rod (12), and a first spring (17) fixedly connected between the connecting tube (3) and the rotating plate (16).

3. A pneumatic conveying device capable of graded drying according to claim 2, characterized in that: The hot air conveying assembly (8) includes a first air inlet pipe (18) and a second air inlet pipe (19) respectively connected to the two groups of air outlet pipes (13), the ends of the first air inlet pipe (18) and the second air inlet pipe (19) are both connected to a collecting pipe (20), the collecting pipe (20) is connected to the air inlet member (28), and a sealing cover (21) is rotatably connected in the collecting pipe (20), a through hole (22) is provided on the sealing cover (21), and a rotating member (34) is connected to the sealing cover (21) for driving the sealing cover (21) to rotate, the two groups of collecting pipes (20) are respectively connected to a first air outlet head (23) and a second air outlet head (24), the ends of the first air outlet head (23) and the second air outlet head (24) are connected to a first bent pipe (25), a butt joint pipe (26) is connected between the two groups of the first bent pipes (25), and the butt joint pipe (26) is connected to a second drying pipe (27).

4. A pneumatic conveying device capable of graded drying according to claim 3, characterized in that: The air intake member (28) includes an air intake pipe (29) connected to the connecting pipe (5); the end of the air intake pipe (29) is connected to a diverter pipe (30); the diverter pipe (30) is connected to two groups of second curved pipes (31); the two groups of second curved pipes (31) are respectively connected to a first air intake head (32) and a second air intake head (33); the first air intake head (32) and the second air intake head (33) are respectively connected to the two groups of collecting pipes (20).

5. A pneumatic conveying device capable of graded drying according to claim 4, characterized in that: The rotating member (34) includes a rotating shaft (35) fixedly connected to the two groups of sealing covers (21), the rotating shaft (35) is rotatably connected to the collecting pipe (20), a limiting member is provided between the rotating shaft (35) and the collecting pipe (20), and a first driven wheel (36) is fixedly connected to the rotating shaft (35), a first belt (37) is transmission-connected between the two groups of the first driven wheels (36), a first driving wheel (38) is transmission-connected to the first belt (37), a connecting shaft (39) is fixedly connected to the axis of the first driving wheel (38), and a driving member (40) is connected to the end of the connecting shaft (39).

6. The pneumatic conveying device capable of graded drying according to claim 5, characterized in that: The stirring assembly (9) includes a rotating column (41) fixedly connected to the two groups of connecting tubes (3), the rotating column (41) is rotationally connected to the heating tube (10), and a second driven wheel (42) is fixedly connected to the rotating column (41), a second belt (43) is transmission-connected between the two groups of the second driven wheels (42), a second driving wheel (44) is transmission-connected to the second belt (43), the second driving wheel (44) is connected to the driving member (40), and the driving member (40) is further connected to a reversing member (45), the reversing member (45) is used to drive the two groups of the heating tubes (10) to rotate, and the rotation direction is opposite to the rotation direction of the heating rod (12).

7. A pneumatic conveying device capable of graded drying according to claim 6, characterized in that: The rotating member (34) includes a gear ring (47) fixedly connected to the two groups of heating tubes (10), a flat gear (46) is meshed between the two groups of gear rings (47), and the flat gear (46) is connected to the driving member (40).

8. The pneumatic conveying device capable of graded drying according to claim 7, characterized in that: The driving member (40) includes a fixing frame (48) fixedly connected to the connecting pipe (5), a support seat (49) fixedly connected to the fixing frame (48), a motor (50) fixedly connected to the support seat (49), an output end of the motor (50) fixedly connected to a driving shaft (51), an end of the driving shaft (51) connected to a transmission member (52), the transmission member (52) connected to the connecting shaft (39), and the driving shaft (51) fixedly connected to the second driving wheel (44) and the flat gear (46).

9. The pneumatic conveying device capable of graded drying according to claim 8, characterized in that: The transmission member (52) includes a ratchet (53) fixedly connected to the drive shaft (51); one side of the ratchet gear (53) is rotatably connected to a rotating disk (54) fixedly connected to the connecting shaft (39); a connecting column (55) is rotatably connected to the rotating disk (54); a pawl (56) meshing with the ratchet gear (53) is fixedly connected to the connecting column (55); and a torsion spring (57) fixedly connected to the rotating plate (16) is also fixedly connected to the connecting column (55).

10. The pneumatic conveying device capable of graded drying according to claim 9, characterized in that: The limiting member includes a rotating block (59) fixedly connected to the rotating shaft (35), the outer side surface of the rotating block (59) is rotatably connected to a fixed sleeve (58) fixedly connected to the collecting pipe (20), a second spring (60) is fixedly connected inside the rotating block (59), the end of the second spring (60) is fixedly connected to a sliding column (61) slidably connected to the rotating block (59), the end of the sliding column (61) is rotatably connected to a ball (62), and a rolling groove (63) adapted to the ball (62) is opened on the fixed sleeve (58).

Images