A positive pressure pneumatic conveying device and its conveying method

Abstract

The present invention is applicable to the technical field of pneumatic conveying, and provides a positive pressure pneumatic conveying equipment and a conveying method thereof, including an auxiliary feeding unit and a constant temperature adjustment unit; the auxiliary feeding unit includes an inner tube, a support column, a filter tube, a spiral shaft, a spiral blade, a support plate, a connecting piece, and a feeding motor; the constant temperature adjustment unit includes an adjustment cylinder, a partition plate, a rotating shaft, a first bevel gear ring, a rotating plate, a second bevel gear ring, and a micro motor; by separating the airflow and the material in a vertical conveying pipeline for conveying and processing, the material is transported upward through the movement of the mechanical structure, and the airflow can be transported without or with little material, and the two do not interfere with each other, thereby avoiding the problem that the gas conveying energy will gradually decrease, resulting in the gas energy being insufficient to drive the material to move upward when the gas is conveyed in a vertical manner, thereby improving the material conveying speed, which is beneficial to the material conveying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic conveying, and more particularly to a positive pressure pneumatic conveying device and a conveying method thereof. Background Art

[0002] Positive pressure pneumatic conveying is a conveying system that uses gas pressure to transport solid particles or powder materials from one place to another. This technology is widely used in many industrial fields such as food, chemical, pharmaceutical, building materials, mining, etc., especially when efficient, clean and reliable material transportation is required.

[0003] In the prior art, positive pressure pneumatic conveying equipment usually includes main parts such as feeders, conveying pipelines, compressors, receiving bins, filters and control systems. When working, materials enter the conveying pipeline from the storage container through the feeder, and compressed air or gas generates positive pressure through the compressor to push the material to flow in the pipeline; when the material reaches the receiving bin, the gas will be separated by the filter and discharged; the control system monitors the entire process, adjusts parameters such as feeding speed and air pressure, and ensures stable operation of the system.

[0004] However, in this process, the positive-pressure gas generated by the compressor is transported from one end of the conveying pipeline to the other end. In the middle, it needs to pass through the horizontal conveying pipeline and then the vertical conveying pipeline. The gas conveying energy will gradually decrease, which will cause the gas to be transported vertically. The energy of the gas is not enough to push the material to move upward, and the material will also fall due to its own gravity and collide with the rising gas, thereby reducing the material conveying speed. There may even be a situation where the material accumulates in the vertical direction, which is not conducive to the material conveying efficiency.

[0005] At the same time, in the process of gas conveying materials, there will be irregular movement between materials and between materials and the inner wall of the conveying pipe, and friction will generate heat, which will increase the temperature of the gas during transportation; if the material is sensitive to temperature, high temperature may cause the material to deteriorate, decompose or lose activity; and high temperature may also cause some materials to become viscous or agglomerate, increasing the risk of blockage during transportation; for this reason, a positive pressure pneumatic conveying equipment and a conveying method thereof are proposed to improve the existing problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a positive pressure pneumatic conveying device and a conveying method thereof.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positive pressure pneumatic conveying device, comprising a conveying unit, an auxiliary loading unit and a constant temperature regulating unit; wherein the conveying unit comprises a base frame, a main blower arranged on the top of the base frame, a feeding pipe arranged at the output end of the main blower, a discharge piece arranged above the feeding pipe, a feeding bin arranged on the top of the discharge piece, a first conveying pipe arranged at an end of the feeding pipe away from the main blower, a second conveying pipe arranged at an end of the first conveying pipe away from the feeding pipe, a discharge pipe arranged at an end of the second conveying pipe away from the first conveying pipe, and a storage bin arranged at an end of the discharge pipe away from the second conveying pipe; the auxiliary loading unit is arranged in the second conveying pipe, It includes an inner tube, support columns evenly arranged on the outer wall of the inner tube, a filter tube arranged at one end of the inner tube, a spiral shaft arranged in the inner tube, spiral blades arranged on the spiral shaft, a support plate arranged at one end of the spiral shaft, a connecting piece arranged at the end of the spiral shaft away from the support plate, and a feeding motor arranged at the end of the connecting piece away from the spiral shaft; a constant temperature adjustment unit is evenly arranged in the first conveying pipeline, which includes an adjustment cylinder, partition plates evenly arranged on the outer wall of the adjustment cylinder, a rotating shaft arranged between the partition plates, a first bevel gear ring arranged on the rotating shaft, rotating plates symmetrically arranged on both sides of the rotating shaft in the radial direction, a second bevel gear ring meshing with the first bevel gear ring for transmission, and a micro motor arranged at one end of the second bevel gear ring.

[0008] The present invention is further configured as follows: the unloading component includes a unloading box, a unloading motor arranged at one end of the unloading box, a unloading shaft arranged at the output end of the unloading motor, and unloading blades evenly arranged on the unloading shaft; the top and bottom of the unloading box are both open, the top of the unloading box can be connected with the bottom of the feed bin, a feed port is provided at the top of the feed pipe, the bottom of the unloading box can be connected with the feed pipe through the feed port, the output end of the unloading motor can pass through the side wall of the unloading box and be connected to the unloading shaft, the unloading shaft and the unloading blades are both located in the unloading box; the first conveying pipe and the second conveying pipe are distributed vertically.

[0009] The present invention is further configured as follows: both ends of the inner tube are open, the support columns are distributed obliquely downward, the end of the support column away from the inner tube can be connected to the inner wall of the second conveying pipe, the filter tube is truncated cone-shaped, the outer wall of the filter tube away from the inner tube can be connected to the inner wall of the second conveying pipe, and the side wall of the filter tube is evenly provided with filter holes.

[0010] The present invention is further configured as follows: the connecting member includes a first connecting column, a first connecting frame rotatably connected to one end of the first connecting column, a second connecting frame arranged at one end of the first connecting frame away from the first connecting column, and a second connecting column rotatably connected to one end of the second connecting frame away from the first connecting frame; the feeding motor is vertically distributed to the spiral shaft, and the output end of the feeding motor can pass through the side wall of the second conveying pipe and extend into the second conveying pipe to be connected to one end of the second connecting column away from the second connecting frame, the second connecting frame and the first connecting frame have the same structural size and are oppositely arranged, and the end of the first connecting column away from the first connecting frame can be connected to one end of the spiral shaft away from the support plate.

[0011] The present invention is further configured as follows: the spiral blade is wound around the spiral shaft, the support plate is vertically distributed to the spiral shaft, the end of the spiral shaft away from the first connecting column can be rotatably connected to the side wall of the support plate, and the end of the support plate away from the spiral shaft can be connected to the inner wall of the second conveying pipe.

[0012] The present invention is further configured as follows: conversion units are also provided at both ends of the second conveying pipeline, and the conversion units include a conversion pipeline, a secondary blower arranged at one end of the conversion pipeline, a movable cylinder arranged in the conversion pipeline, a rotating motor arranged at one end of the movable cylinder, a rotating shaft arranged at the output end of the rotating motor, a moving block sleeved on the rotating shaft, and a coordinating member uniformly arranged on the outside of the movable cylinder; one end of the conversion pipeline away from the secondary blower can be connected to the connection between the first conveying pipeline and the second conveying pipeline, and the other end of the conversion pipeline away from the secondary blower can be connected to the connection between the second conveying pipeline and the discharge pipeline, and the two conversion pipelines are vertically distributed, the end of the movable cylinder away from the rotating motor can be rotatably connected to the inner wall of the conversion pipeline, the output end of the rotating motor can penetrate the side wall of the conversion pipeline and be connected to the rotating shaft, the end of the rotating shaft away from the rotating motor can be rotatably connected to the inner wall of the movable cylinder, a thread groove is provided on the rotating shaft, and the moving block can be threadedly connected to the rotating shaft through the thread groove.

[0013] The present invention is further configured as follows: the coordinating part includes a coordinating blade, a fixed rod arranged at one end of the coordinating blade, and a swing rod rotatably connected to the fixed rod at one end away from the coordinating blade; the fixed rod is eccentrically distributed at one end of the coordinating blade, and the fixed rod and the swing rod are vertically distributed; movable holes are evenly opened on the outer wall of the movable cylinder, and the end of the coordinating blade close to the fixed rod can be fitted and plugged into the movable hole, and the end of the swing rod away from the fixed rod can be rotatably connected to the outer wall of the moving block.

[0014] The present invention is further configured as follows: the adjusting cylinder is drum-shaped, the diameters of the two ends of the adjusting cylinder are larger than the diameter of the middle part, the outer walls of the two ends of the adjusting cylinder can be connected to the inner wall of the first conveying pipe, the side of the partition plate away from the adjusting cylinder can be connected to the inner wall of the first conveying pipe, the rotating shaft and the partition plate are vertically distributed, the two ends of the rotating shaft can be rotatably connected to the inner wall of the first conveying pipe, and the output end of the micro motor can pass through the side wall of the first conveying pipe and be connected to the second bevel gear ring.

[0015] The present invention is further configured as follows: adjustment holes are symmetrically opened on the outer wall in the radial direction of the adjustment cylinder, and the adjustment holes can be evenly distributed around the circumferential direction of the adjustment cylinder; delivery holes are symmetrically opened on the outer wall in the radial direction of the first delivery pipe, and the delivery holes can be evenly distributed around the circumferential direction of the first delivery pipe; the adjustment hole can be aligned with the delivery hole, and the adjustment hole and the delivery hole are both located between two corresponding partitions; an air heat exchanger is provided at one end of one of the delivery holes, and a micro exhaust fan is provided at the end of the air heat exchanger away from the delivery hole.

[0016] A positive pressure pneumatic conveying method, using the positive pressure pneumatic conveying device as described above, comprises the following steps:

[0017] S1. When materials need to be transported, on the one hand, the materials will fall into the discharge part through the feed bin, and then fall into the feed pipe through the uniform rotation of the discharge part. On the other hand, the main blower is started, and air enters the main blower from the air inlet of the main blower, and after being accelerated by the impeller, it is discharged from the air outlet of the main blower to form an airflow, so that the materials falling into the feed pipe can be transported and displaced;

[0018] S2. After the material is transported to the first conveying pipeline, a part of the hot air flow will enter the space between the regulating cylinder and the first conveying pipeline along the conveying direction, so that a part of the hot air flow is discharged. Then the micro motor starts to drive the second bevel gear ring to rotate in one direction, so that the first bevel gear ring can swing with the rotation of the second bevel gear ring, and the rotating shaft and the rotating plate also swing synchronously, so that the two ends of the rotating plate can synchronously close the positions where the hot air flow enters and is discharged, and the positions where the external cold air can enter and be discharged are synchronously opened, and enter the first conveying pipeline, and neutralize with the hot air flow inside the first conveying pipeline, so that the temperature in the first conveying pipeline can be at a normal material conveying temperature; the other part of the air flow will continue to carry the material along the direction of the air flow for conveying displacement;

[0019] S3. When the micro motor starts again and drives the second bevel gear ring to rotate in the other direction, the two ends of the rotating plate will re-close the positions where the outside cold air enters and is discharged synchronously, and the hot air flow in the first conveying pipeline is discharged again;

[0020] S4. When the material enters the second conveying pipe, on the one hand, the airflow will enter the space between the second conveying pipe and the inner pipe through the filter pipe and continue to be conveyed upward; on the other hand, the feeding motor is started, and its output end drives the spiral shaft to rotate through the connecting piece, and the spiral blade also rotates accordingly, so that the spiral blade can convey the material driven by the airflow upward in a spiral manner, so that the material moves upward along the rotation of the spiral blade;

[0021] S5. When the material moves from the inner tube to the top, the airflow contacts the material again, and continues to blow the material from the second conveying pipe and conveys it to the storage bin through the discharge pipe.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] (1) By separating the airflow and the material in the vertical conveying pipeline for conveying, the material is transported upward through the movement of the mechanical structure, while the airflow can be transported without or with little material. The two do not interfere with each other, thus avoiding the problem that the gas conveying energy will gradually decrease, resulting in the gas energy being insufficient to push the material upward when the gas is conveyed in a vertical manner, and the material will also fall due to its own gravity and collide with the rising gas, thereby increasing the material conveying speed and thus facilitating the material conveying efficiency.

[0024] (2) The rotating motor continues to drive the rotating shaft to rotate, so that the three coordination blades can drive the entire movable cylinder to rotate, thereby achieving the purpose of rotating the three coordination blades. The coordination blades can bring part of the original airflow and the auxiliary airflow to an airflow line through rotation, avoiding the problem of part of the original airflow colliding with the auxiliary conveying airflow, thereby improving the material conveying efficiency.

[0025] (3) By discharging part of the hot air during material transportation, the cold air from the outside can be sucked in. After the cold air from the outside enters the conveying pipeline, it is neutralized with the other part of the hot air in the conveying pipeline, so that the temperature in the conveying pipeline can be kept at the normal material transportation temperature, avoiding the problem that the material is sensitive to temperature and high temperature may cause the material to deteriorate, decompose or lose activity, thereby ensuring the quality of the material. High temperature may also cause some materials to become viscous or agglomerate, increasing the risk of blockage during transportation, thereby improving the material transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the positive pressure pneumatic conveying equipment of the present invention.

[0027] Figure 2 It is a schematic diagram of the overall structure of the unloading part in the present invention.

[0028] Figure 3 It is a schematic diagram of the overall structure of the feed pipeline in the present invention.

[0029] Figure 4 This is an internal exploded view of the second delivery pipeline in the present invention.

[0030] Figure 5 It is a schematic diagram of the overall structure of the auxiliary feeding unit in the present invention.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0032] Figure 7 It is a schematic diagram of the overall structure of the conversion unit in the present invention.

[0033] Figure 8 It is a schematic diagram of the overall structure of the coordination component in the present invention.

[0034] Fig. 9 It is a front view of the first conveying pipeline, the second conveying pipeline and the discharge pipeline in the present invention.

[0035] Fig.10 It is a schematic diagram of the overall structure of the first delivery pipeline and the delivery hole in the present invention.

[0036] Fig.11 It is a schematic diagram of the overall structure of the constant temperature adjustment unit in the present invention.

[0037] Fig.12 for Fig.11 Enlarged view of point B in the middle.

[0038] Description of reference numerals: 1. conveying unit; 11. chassis; 12. main blower; 13. feed pipe; 131. feed port; 14. discharge member; 141. discharge box; 142. discharge motor; 143. discharge shaft; 144. discharge blade; 15. feed bin; 16. first conveying pipe; 161. conveying hole; 17. second conveying pipe; 18. discharge pipe; 19. storage bin;

[0039] 2. Auxiliary feeding unit; 21. Inner tube; 22. Support column; 23. Filter tube; 231. Filter hole; 24. Screw shaft; 25. Screw blade; 26. Support plate; 27. Connector; 271. First connecting column; 272. First connecting frame; 273. Second connecting frame; 274. Second connecting column; 28. Feeding motor;

[0040] 3. Constant temperature adjustment unit; 31. Adjustment cylinder; 311. Adjustment hole; 32. Partition plate; 33. Rotating shaft; 34. First cone gear ring; 35. Rotating plate; 36. Second cone gear ring; 37. Micro motor; 38. Air heat exchanger; 39. Micro exhaust fan;

[0041] 4. Conversion unit; 41. Conversion duct; 42. Secondary blower; 43. Movable cylinder; 431. Movable hole; 44. Rotating motor; 45. Rotating shaft; 451. Threaded groove; 46. Moving block; 47. Coordinating piece; 471. Coordinating blade; 472. Fixed rod; 473. Swing rod. DETAILED DESCRIPTION

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0043] See also Figure 1-Figure 12 , the present invention provides the following technical solutions:

[0044] Example 1, see Figure 1-Figure 12 A positive pressure pneumatic conveying equipment comprises a conveying unit 1, an auxiliary feeding unit 2 and a constant temperature adjustment unit 3; wherein, the conveying unit 1 is used to convey materials through positive pressure gas to promote the flow of materials in the pipeline; when the materials arrive at the receiving bin, the gas will be separated by the filter and discharged; the control system monitors the whole process, adjusts the feeding speed, air pressure and other parameters to ensure the stable operation of the system.

[0045] The function of the auxiliary feeding unit 2 is to separate the airflow and the material in the vertical conveying pipeline for conveying and processing, so that the material is transported upward through the movement of the mechanical structure, while the airflow can be transported without or with little material, and the two do not interfere with each other, thereby avoiding the problem that the gas conveying energy will gradually decrease, resulting in the gas energy being insufficient to drive the material to move upward when the gas is conveyed in a vertical manner, and the material will also fall due to its own gravity and collide with the rising gas, thereby improving the material conveying speed, which is beneficial to the material conveying efficiency.

[0046] The function of the constant temperature adjustment unit 3 is to discharge part of the hot air during material transportation and to absorb the external cold air, so that after the external cold air enters the conveying pipeline, it is neutralized with the other part of the hot air in the conveying pipeline, so that the temperature in the conveying pipeline can be kept at a normal material conveying temperature, avoiding the problem that the material is sensitive to temperature and high temperature may cause the material to deteriorate, decompose or lose activity, thereby ensuring the quality of the material. High temperature may also cause some materials to become viscous or agglomerated, increasing the risk of blockage during transportation, thereby improving the material transportation efficiency.

[0047] See also Figure 1-Figure 3Specifically, the conveying unit 1 includes a base frame 11, a main blower 12 arranged on the top of the base frame 11, a feeding pipe 13 arranged at the output end of the main blower 12, a discharge piece 14 arranged above the feeding pipe 13, a feeding bin 15 arranged on the top of the discharge piece 14, a first conveying pipe 16 arranged at an end of the feeding pipe 13 away from the main blower 12, a second conveying pipe 17 arranged at an end of the first conveying pipe 16 away from the feeding pipe 13, a discharge pipe 18 arranged at an end of the second conveying pipe 17 away from the first conveying pipe 16, and a storage bin 19 arranged at an end of the discharge pipe 18 away from the second conveying pipe 17.

[0048] Among them, when it is necessary to transport the material, on the one hand, the material will fall into the discharge piece 14 through the feed bin 15, and then fall into the feed pipe 13 through the uniform rotation discharge of the discharge piece 14. On the other hand, the main blower 12 is started, and the air enters the main blower 12 from the air inlet of the main blower 12. After being accelerated by the impeller, it is discharged from the air outlet of the main blower 12 to form an airflow, so that the material falling into the feed pipe 13 can be transported and displaced, and finally enters the storage bin 19 after passing through the first conveying pipe 16, the second conveying pipe 17 and the discharge pipe 18.

[0049] See also Figure 4-Figure 9 Specifically, the auxiliary feeding unit 2 is arranged in the second conveying pipeline 17, and includes an inner tube 21, support columns 22 evenly arranged on the outer wall of the inner tube 21, a filter tube 23 arranged at one end of the inner tube 21, a spiral shaft 24 arranged in the inner tube 21, a spiral blade 25 arranged on the spiral shaft 24, a support plate 26 arranged at one end of the spiral shaft 24, a connecting piece 27 arranged at the end of the spiral shaft 24 away from the support plate 26, and a feeding motor 28 arranged at the end of the connecting piece 27 away from the spiral shaft 24.

[0050] Among them, when the material enters the second conveying pipe 17, on the one hand, the airflow will enter the space between the second conveying pipe 17 and the inner pipe 21 through the filter pipe 23, and continue to be conveyed upward; on the other hand, the feeding motor 28 is started, and its output end drives the screw shaft 24 to rotate through the connecting piece 27, and the spiral blade 25 also rotates accordingly, so that the spiral blade 25 can spirally convey the material driven by the airflow upward, so that the material moves upward along the rotation of the spiral blade 25; when the material moves from the inner tube 21 to the top, the airflow also contacts the material again, and continues to blow the material from the second conveying pipe 17, and conveys it to the storage bin 19 through the discharge pipe 18. The airflow and the material do not interfere with each other, thereby avoiding the problem that the gas conveying energy will gradually decrease, resulting in the gas being insufficient to drive the material to move upward when the gas is conveyed in a vertical manner, and the material will also fall by its own gravity and collide with the rising gas, thereby improving the material conveying speed, which is beneficial to the material conveying efficiency.

[0051] See also Figure 10-12 Specifically, the constant temperature adjustment unit 3 is evenly arranged in the first conveying pipeline 16, and includes an adjustment cylinder 31, partition plates 32 evenly arranged on the outer wall of the adjustment cylinder 31, a rotating shaft 33 arranged between the partition plates 32, a first bevel gear ring 34 arranged on the rotating shaft 33, a rotating plate 35 symmetrically arranged on both sides of the rotating shaft 33 in the radial N direction, a second bevel gear ring 36 meshing with the first bevel gear ring 34 for transmission, and a micro motor 37 arranged at one end of the second bevel gear ring 36.

[0052] Among them, after the material is transported to the first conveying pipe 16, a part of the hot air flow will enter the space between the regulating cylinder 31 and the first conveying pipe 16 along the conveying direction, so that a part of the hot air flow is discharged, and then the micro motor 37 is started to drive the second bevel gear ring 36 to rotate in one direction, so that the first bevel gear ring 34 can swing with the rotation of the second bevel gear ring 36, and the rotating shaft 33 and the rotating plate 35 also swing synchronously, so that the two ends of the rotating plate 35 can synchronously close the positions where the hot air flow enters and is discharged, and the positions where the external cold air can enter and be discharged are synchronously opened, entering the first conveying pipe 16, and neutralizing with the hot air flow inside the first conveying pipe 16, so that the temperature in the first conveying pipe 16 can be at a normal material conveying temperature; the other part of the air flow will continue to carry the material along the direction of the air flow for conveying displacement; the material is sensitive to temperature, and high temperature may cause the material to deteriorate, decompose or lose activity, thereby ensuring the quality of the material, and high temperature may also cause some materials to become viscous or agglomerated, increasing the risk of blockage during transportation, thereby improving the material transportation efficiency.

[0053] When the micro motor 37 is started again and drives the second bevel gear ring 36 to rotate in the other direction, the two ends of the rotating plate 35 will synchronously close the positions for the entry and discharge of external cold air again, and the hot air flow in the first conveying pipe 16 will be discharged again.

[0054] See also Figure 1-Figure 3 Furthermore, the unloading member 14 includes a unloading box 141, a unloading motor 142 arranged at one end of the unloading box 141, a unloading shaft 143 arranged at the output end of the unloading motor 142, and unloading blades 144 evenly arranged on the unloading shaft 143; the top and bottom of the unloading box 141 are both open, the top of the unloading box 141 can be connected with the bottom of the feed bin 15, the top of the feed pipe 13 is provided with a feed port 131, the bottom of the unloading box 141 can be connected with the feed pipe 13 through the feed port 131, the output end of the unloading motor 142 can pass through the side wall of the unloading box 141 and be connected to the unloading shaft 143, the unloading shaft 143 and the unloading blades 144 are both located in the unloading box 141; the first conveying pipe 16 and the second conveying pipe 17 are distributed vertically.

[0055] The unloading motor 142 is started to drive the unloading shaft 143 to rotate, so that the unloading blades 144 can rotate synchronously, and the materials are unloaded evenly, thus avoiding blockage of the materials after entering the feed pipe 13 .

[0056] See also Figure 4-Figure 6 Furthermore, both ends of the inner tube 21 are open, the support columns 22 are distributed obliquely downward, the end of the support column 22 away from the inner tube 21 can be connected to the inner wall of the second conveying pipe 17, the filter tube 23 is truncated cone-shaped, and the outer wall of the filter tube 23 away from the inner tube 21 can be connected to the inner wall of the second conveying pipe 17, and the side wall of the filter tube 23 is evenly provided with filter holes 231.

[0057] Among them, through the mutual cooperation between the filter tube 23 and the filter hole 231, on the one hand, most of the materials can be blocked, so that the materials can only be transported and displaced in the vertical direction through the spiral blades 25; on the other hand, the airflow can also enter the space between the second conveying pipe 17 and the inner tube 21 through the filter hole 231, and continue to be transported upward. The two do not interfere with each other, thereby improving the conveying speed of the material, which is beneficial to the conveying efficiency of the material.

[0058] See also Figure 4-Figure 6Furthermore, the connecting member 27 includes a first connecting column 271, a first connecting frame 272 rotatably connected to one end of the first connecting column 271, a second connecting frame 273 arranged at one end of the first connecting frame 272 away from the first connecting column 271, and a second connecting column 274 rotatably connected to one end of the second connecting frame 273 away from the first connecting frame 272; the feeding motor 28 is vertically distributed with the screw shaft 24, and the output end of the feeding motor 28 can pass through the side wall of the second conveying pipe 17 and extend into the second conveying pipe 17 to be connected to one end of the second connecting column 274 away from the second connecting frame 273, the second connecting frame 273 and the first connecting frame 272 have the same structural size and are oppositely arranged, and the end of the first connecting column 271 away from the first connecting frame 272 can be connected to the end of the screw shaft 24 away from the support plate 26.

[0059] Among them, the feeding motor 28 is started, and its output end drives the second connecting column 274 to rotate. Since the second connecting column 274 and the second connecting frame 273, the first connecting frame 272 and the first connecting column 271 are all rotatably connected, and the first connecting frame 272 and the second connecting frame 273 are fixed, the spiral shaft 24 can drive the spiral blade 25 to rotate synchronously, so that the spiral blade 25 can spirally convey the material driven by the airflow upward, so that the material moves upward along the rotation of the spiral blade 25; thereby avoiding the problem that the gas conveying energy will gradually decrease, resulting in the gas energy being insufficient to drive the material to move upward when the gas is conveyed in a vertical manner, and the material will also fall by its own gravity and collide with the rising gas, thereby improving the material conveying speed, which is beneficial to the material conveying efficiency.

[0060] See also Figure 4-Figure 6 Furthermore, the spiral blade 25 is wound around the spiral shaft 24, the support plate 26 is vertically distributed with the spiral shaft 24, the end of the spiral shaft 24 away from the first connecting column 271 can be rotatably connected to the side wall of the support plate 26, and the end of the support plate 26 away from the spiral shaft 24 can be connected to the inner wall of the second conveying pipe 17.

[0061] Example 2, see Figure 7-Figure 9Furthermore, conversion units 4 are also provided at both ends of the second conveying pipeline 17, and the conversion unit 4 includes a conversion pipeline 41, a secondary blower 42 arranged at one end of the conversion pipeline 41, a movable cylinder 43 arranged in the conversion pipeline 41, a rotating motor 44 arranged at one end of the movable cylinder 43, a rotating shaft 45 arranged at the output end of the rotating motor 44, a moving block 46 sleeved on the rotating shaft 45, and a coordination piece 47 evenly arranged on the outer side of the movable cylinder 43; one end of one of the conversion pipelines 41 away from the secondary blower 42 can be connected to the connection between the first conveying pipeline 16 and the second conveying pipeline 17, and the other end of the conversion pipeline 41 away from the secondary blower 42 can be connected to the connection between the second conveying pipeline 17 and the discharge pipeline 18, and the two conversion pipelines 41 are vertically distributed.

[0062] Among them, when the airflow is transported from the first conveying pipe 16 to the second conveying pipe 17, it will pass through the bending place where the first conveying pipe 16 and the second conveying pipe 17 are connected. On the one hand, it will cause the material to accumulate at the bending place, and on the other hand, it will also reduce the material transportation efficiency. Therefore, through the design of the conversion pipe 41 and the secondary blower 42, the secondary blower 42 is started to assist in pushing and transporting the material at the bending place where the first conveying pipe 16 and the second conveying pipe 17 are connected, thereby improving the material transportation speed; the auxiliary transportation working principle at the bending place of the second conveying pipe 17 and the discharge pipe 18 is the same.

[0063] See also Figure 7-Figure 9 Furthermore, one end of the movable cylinder 43 away from the rotating motor 44 can be rotatably connected to the inner wall of the conversion pipe 41, the output end of the rotating motor 44 can penetrate the side wall of the conversion pipe 41 and be connected to the rotating shaft 45, and one end of the rotating shaft 45 away from the rotating motor 44 can be rotatably connected to the inner wall of the movable cylinder 43, and a thread groove 451 is provided on the rotating shaft 45, and the moving block 46 can be threadedly connected to the rotating shaft 45 through the thread groove 451.

[0064] See also Figure 7-Figure 9 Furthermore, the coordinating member 47 includes a coordinating blade 471, a fixed rod 472 arranged at one end of the coordinating blade 471, and a swing rod 473 rotatably connected to the fixed rod 472 at one end away from the coordinating blade 471; the fixed rod 472 is eccentrically distributed at one end of the coordinating blade 471, and the fixed rod 472 and the swing rod 473 are vertically distributed; movable holes 431 are evenly opened on the outer wall of the movable cylinder 43, and the end of the coordinating blade 471 close to the fixed rod 472 can be fitted and inserted into the movable hole 431, and the end of the swing rod 473 away from the fixed rod 472 can be rotatably connected to the outer wall of the moving block 46.

[0065] Among them, in the process of airflow driving material transportation, when passing through the bending parts of the first conveying pipe 16 and the second conveying pipe 17, and the bending parts of the second conveying pipe 17 and the discharge pipe 18, part of the original airflow will still collide with the auxiliary conveying airflow, affecting the material transportation efficiency. Therefore, the rotating motor 44 is started to drive the rotating shaft 45 to rotate, so that the moving block 46 can make a linear displacement through the rotation of the thread groove 451. During this process, the moving block 46 will simultaneously push the three swing rods 473, so that the swing rod 473 pushes the coordinating blade 471 to rotate through the fixed rod 472, thereby achieving the purpose of adjusting the inclination angle of the three coordinating blades 471 at the same time, increasing the contact area between the airflow and the coordinating blade 471, and facilitating the neutralization of the subsequent airflow and auxiliary airflow.

[0066] Since the opening length of the thread groove 451 is limited, when the three coordinating blades 471 are adjusted and tilted to the limit in one direction, the three coordinating blades 471 will be fixed to the movable cylinder 43, and then the rotating motor 44 will continue to drive the rotating shaft 45 to rotate, so that the three coordinating blades 471 can drive the entire movable cylinder 43 to rotate, thereby achieving the purpose of rotating the three coordinating blades 471, so that the coordinating blades 471 can bring part of the original airflow and the auxiliary airflow to an airflow line through rotation, avoiding the problem of part of the original airflow colliding with the auxiliary conveying airflow, thereby improving the material conveying efficiency.

[0067] Embodiment 3, through the cooperation of embodiment 1 and embodiment 2, although the problem that the gas transmission energy of the prior art will gradually decrease, resulting in the gas energy being insufficient to push the material to move upward when the gas is transported in a vertical manner, and the material will also fall by its own gravity and collide with the rising gas; however, it still does not solve the problem that the materials and the inner wall of the conveying pipe in the prior art will move irregularly, and friction will generate heat, thereby causing the gas temperature to rise during transportation; if the material is sensitive to temperature, high temperature may cause the material to deteriorate, decompose or lose activity; and high temperature may also cause some materials to become viscous or agglomerated, increasing the risk of blockage during transportation; for this reason, the following solution is proposed:

[0068] See also Figure 10-12 Furthermore, the adjusting cylinder 31 is drum-shaped, the diameters at both ends of the adjusting cylinder 31 are larger than the diameter in the middle, the outer walls at both ends of the adjusting cylinder 31 can be connected to the inner wall of the first conveying pipe 16, the side of the partition plate 32 away from the adjusting cylinder 31 can be connected to the inner wall of the first conveying pipe 16, the rotating shaft 33 and the partition plate 32 are vertically distributed, the two ends of the rotating shaft 33 can be rotatably connected to the inner wall of the first conveying pipe 16, and the output end of the micro motor 37 can pass through the side wall of the first conveying pipe 16 and be connected to the second bevel gear ring 36.

[0069] Among them, since the regulating cylinder 31 is drum-shaped, the diameters at both ends of the regulating cylinder 31 are larger than the diameter in the middle. Therefore, when the gas carries the logistics into the regulating cylinder 31 from the first conveying pipeline 16, a part of the hot air flow will enter the regulating cylinder 31, the first conveying pipeline 16, and the corresponding space between the two partition plates 32 along the conveying direction, so that a part of the hot air flow is discharged.

[0070] See also Figure 10-12 Furthermore, adjustment holes 311 are symmetrically provided on the outer wall of the adjustment cylinder 31 in the radial N direction, and the adjustment holes 311 can be evenly distributed around the circumferential direction of the adjustment cylinder 31; delivery holes 161 are symmetrically provided on the outer wall of the first delivery pipe 16 in the radial N direction, and the delivery holes 161 can be evenly distributed around the circumferential direction of the first delivery pipe 16; the adjustment hole 311 can be aligned with the delivery hole 161, and the adjustment hole 311 and the delivery hole 161 are both located between the corresponding two partition plates 32; an air heat exchanger 38 is provided at one end of one of the delivery holes 161, and a micro exhaust fan 39 is provided at the end of the air heat exchanger 38 away from the delivery hole 161.

[0071] Among them, when a part of the hot air flow needs to enter the regulating cylinder 31, the first delivery pipe 16, and the space between the corresponding two partition plates 32, since the two regulating holes 311 and the two delivery holes 161 are aligned and distributed, a part of the hot air flow will enter through one of the regulating holes 311, and then discharge from the first delivery pipe 16 through another delivery hole 161 arranged diagonally to one of the regulating holes 311; it should be noted that at this time, the two ends of the rotating plate 35 are in a state of closing the other regulating hole 311 and one of the delivery holes 161 at the same time.

[0072] Then the micro motor 37 is started, driving the second bevel gear ring 36 to rotate in one direction, so that the first bevel gear ring 34 can swing with the rotation of the second bevel gear ring 36, and the rotating shaft 33 and the rotating plate 35 also swing synchronously, so that the two ends of the rotating plate 35 can synchronously close one of the adjusting holes 311 for the hot air flow to enter and the other conveying hole 161 for the hot air flow to discharge. In this process, the micro exhaust fan 39 is started to extract the outside air and cool the air through the air heat exchanger 38. The cooled outside cold air will enter the first conveying pipe 16 through one of the conveying holes 161 and the other adjusting hole 311, and neutralize the hot air flow inside the first conveying pipe 16, so that the temperature in the first conveying pipe 16 can be at a normal material conveying temperature; the problem that the material is sensitive to temperature and high temperature may cause the material to deteriorate, decompose or lose activity, thereby ensuring the quality of the material, and high temperature may also cause some materials to become viscous or agglomerated, increasing the risk of blockage during transportation, thereby improving the material transportation efficiency.

[0073] Embodiment 4, a positive pressure pneumatic conveying method, using the positive pressure pneumatic conveying device as described above, comprises the following steps:

[0074] S1. When materials need to be transported, on the one hand, the materials will fall into the discharge piece 14 through the feed bin 15, and then fall into the feed pipe 13 through the uniform rotation of the discharge piece 14. On the other hand, the main blower 12 is started, and air enters the main blower 12 from the air inlet of the main blower 12. After being accelerated by the impeller, the air is discharged from the air outlet of the main blower 12 to form an airflow, thereby transporting and displacing the materials that fall into the feed pipe 13.

[0075] S2. After the material is transported to the first conveying pipe 16, a part of the hot air flow will enter the space between the regulating cylinder 31 and the first conveying pipe 16 along the conveying direction, so that a part of the hot air flow is discharged, and then the micro motor 37 is started to drive the second bevel gear ring 36 to rotate in one direction, so that the first bevel gear ring 34 can swing with the rotation of the second bevel gear ring 36, and the rotating shaft 33 and the rotating plate 35 also swing synchronously, so that the two ends of the rotating plate 35 can synchronously close the positions where the hot air flow enters and is discharged, and the positions where the external cold air can enter and be discharged are synchronously opened, and enter the first conveying pipe 16, and neutralize with the hot air flow inside the first conveying pipe 16, so that the temperature inside the first conveying pipe 16 can be at a normal material conveying temperature; the other part of the air flow will continue to carry the material along the direction of the air flow for conveying displacement.

[0076] S3. When the micro motor 37 is started again and drives the second bevel gear ring 36 to rotate in the other direction, the two ends of the rotating plate 35 will synchronously close the positions for the entry and discharge of external cold air again, and the hot air flow in the first conveying pipe 16 will be discharged again.

[0077] S4. When the material enters the second conveying pipe 17, on the one hand, the airflow will enter the space between the second conveying pipe 17 and the inner pipe 21 through the filter tube 23 and continue to be conveyed upward; on the other hand, the feeding motor 28 is started, and its output end drives the screw shaft 24 to rotate through the connecting piece 27, and the spiral blade 25 also rotates accordingly, so that the spiral blade 25 can spirally convey the material driven by the airflow upward, so that the material moves upward along the rotation of the spiral blade 25.

[0078] S5. When the material moves from the inner tube 21 to the top, the airflow contacts the material again, and continues to blow the material from the second conveying pipe 17 and conveys it to the storage bin 19 through the discharge pipe 18.

[0079] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A positive pressure pneumatic conveying device, characterized in that: include, A conveying unit (1), comprising a base frame (11), a main blower (12) arranged on the top of the base frame (11), a feed pipe (13) arranged at the output end of the main blower (12), a discharge piece (14) arranged above the feed pipe (13), a feed bin (15) arranged on the top of the discharge piece (14), a first conveying pipe (16) arranged at an end of the feed pipe (13) away from the main blower (12), a second conveying pipe (17) arranged at an end of the first conveying pipe (16) away from the feed pipe (13), a discharge pipe (18) arranged at an end of the second conveying pipe (17) away from the first conveying pipe (16), and a storage bin (19) arranged at an end of the discharge pipe (18) away from the second conveying pipe (17); An auxiliary feeding unit (2) is arranged in the second conveying pipeline (17), comprising an inner tube (21), support columns (22) evenly arranged on the outer wall of the inner tube (21), a filter tube (23) arranged at one end of the inner tube (21), a spiral shaft (24) arranged in the inner tube (21), a spiral blade (25) arranged on the spiral shaft (24), a support plate (26) arranged at one end of the spiral shaft (24), a connecting piece (27) arranged at one end of the spiral shaft (24) away from the support plate (26), and a feeding motor (28) arranged at one end of the connecting piece (27) away from the spiral shaft (24); The filter tube (23) is in a truncated cone shape, the outer wall of the filter tube (23) away from the inner tube (21) can be connected to the inner wall of the second delivery pipe (17), and the side wall of the filter tube (23) is evenly provided with filter holes (231); and, A constant temperature adjustment unit (3) is evenly arranged in the first delivery pipe (16), comprising an adjustment cylinder (31), partition plates (32) evenly arranged on the outer wall of the adjustment cylinder (31), a rotating shaft (33) arranged between the partition plates (32), a first bevel gear ring (34) arranged on the rotating shaft (33), rotating plates (35) symmetrically arranged on both sides of the rotating shaft (33) in a radial direction, a second bevel gear ring (36) meshing with the first bevel gear ring (34) for transmission, and a micro motor (37) arranged at one end of the second bevel gear ring (36); The regulating cylinder (31) is drum-shaped, the diameters of the two ends of the regulating cylinder (31) are larger than the diameter of the middle part, the outer walls of the two ends of the regulating cylinder (31) can be connected to the inner wall of the first conveying pipe (16), the side of the partition plate (32) away from the regulating cylinder (31) can be connected to the inner wall of the first conveying pipe (16), the rotating shaft (33) and the partition plate (32) are vertically distributed, the two ends of the rotating shaft (33) can be rotatably connected to the inner wall of the first conveying pipe (16), and the output end of the micro motor (37) can penetrate the side wall of the first conveying pipe (16) and be connected to the second bevel gear ring (36); The outer wall of the adjusting cylinder (31) in the radial direction is symmetrically provided with adjusting holes (311), and the adjusting holes (311) can be evenly distributed in the circumferential direction around the adjusting cylinder (31); the outer wall of the first conveying pipe (16) in the radial direction is symmetrically provided with conveying holes (161), and the conveying holes (161) can be evenly distributed in the circumferential direction around the first conveying pipe (16); the adjusting holes (311) can be aligned with the conveying holes (161), and the adjusting holes (311) and the conveying holes (161) are both located between two corresponding partition plates (32); An air heat exchanger (38) is provided at one end of one of the delivery holes (161), and a micro exhaust fan (39) is provided at one end of the air heat exchanger (38) away from the delivery hole (161).

2. The positive pressure pneumatic conveying equipment according to claim 1, characterized in that: The discharge member (14) comprises a discharge box (141), a discharge motor (142) arranged at one end of the discharge box (141), a discharge shaft (143) arranged at the output end of the discharge motor (142), and discharge blades (144) evenly arranged on the discharge shaft (143); The top and bottom of the discharge box (141) are both open, the top of the discharge box (141) can be connected to the bottom of the feed bin (15), the top of the feed pipe (13) is provided with a feed port (131), the bottom of the discharge box (141) can be connected to the feed pipe (13) through the feed port (131), the output end of the discharge motor (142) can pass through the side wall of the discharge box (141) and be connected to the discharge shaft (143), and the discharge shaft (143) and the discharge blade (144) are both located in the discharge box (141); the first conveying pipe (16) and the second conveying pipe (17) are vertically distributed.

3. The positive pressure pneumatic conveying equipment according to claim 1, characterized in that: Both ends of the inner tube (21) are open, and the support columns (22) are distributed obliquely downward; one end of the support column (22) away from the inner tube (21) can be connected to the inner wall of the second delivery pipeline (17).

4. The positive pressure pneumatic conveying equipment according to claim 3, characterized in that: The connecting member (27) comprises a first connecting column (271), a first connecting frame (272) rotatably connected to one end of the first connecting column (271), a second connecting frame (273) arranged at one end of the first connecting frame (272) away from the first connecting column (271), and a second connecting column (274) rotatably connected to one end of the second connecting frame (273) away from the first connecting frame (272); The feeding motor (28) is arranged vertically with respect to the screw shaft (24); the output end of the feeding motor (28) can penetrate the side wall of the second conveying pipe (17) and extend into the second conveying pipe (17) to be connected to an end of the second connecting column (274) away from the second connecting frame (273); the second connecting frame (273) and the first connecting frame (272) have the same structural size and are arranged oppositely; the end of the first connecting column (271) away from the first connecting frame (272) can be connected to an end of the screw shaft (24) away from the support plate (26).

5. The positive pressure pneumatic conveying equipment according to claim 4, characterized in that: The spiral blade (25) is wound around the spiral shaft (24); the support plate (26) is vertically arranged with respect to the spiral shaft (24); one end of the spiral shaft (24) away from the first connecting column (271) can be rotatably connected to the side wall of the support plate (26); and one end of the support plate (26) away from the spiral shaft (24) can be connected to the inner wall of the second conveying pipe (17).

6. The positive pressure pneumatic conveying equipment according to claim 1, characterized in that: A conversion unit (4) is also provided at both ends of the second conveying pipeline (17), the conversion unit (4) comprising a conversion pipeline (41), a secondary blower (42) provided at one end of the conversion pipeline (41), a movable cylinder (43) provided in the conversion pipeline (41), a rotating motor (44) provided at one end of the movable cylinder (43), a rotating shaft (45) provided at an output end of the rotating motor (44), a moving block (46) sleeved on the rotating shaft (45), and coordination members (47) uniformly provided on the outside of the movable cylinder (43); One end of one of the conversion pipes (41) away from the secondary blower (42) can be connected to the connection between the first conveying pipe (16) and the second conveying pipe (17), and the other end of the conversion pipe (41) away from the secondary blower (42) can be connected to the connection between the second conveying pipe (17) and the discharge pipe (18). The two conversion pipes (41) are vertically distributed. One end of the movable cylinder (43) away from the rotating motor (44) can be rotatably connected to the inner wall of the conversion pipe (41). The output end of the rotating motor (44) can pass through the side wall of the conversion pipe (41) and be connected to the rotating shaft (45). One end of the rotating shaft (45) away from the rotating motor (44) can be rotatably connected to the inner wall of the movable cylinder (43). A threaded groove (451) is provided on the rotating shaft (45), and the moving block (46) can be threadedly connected to the rotating shaft (45) through the threaded groove (451).

7. The positive pressure pneumatic conveying equipment according to claim 6, characterized in that: The coordination member (47) comprises a coordination blade (471), a fixed rod (472) disposed at one end of the coordination blade (471), and a swing rod (473) rotatably connected to one end of the fixed rod (472) away from the coordination blade (471); the fixed rod (472) is eccentrically distributed at one end of the coordination blade (471), and the fixed rod (472) and the swing rod (473) are vertically distributed; The outer wall of the movable cylinder (43) is evenly provided with movable holes (431); one end of the coordination blade (471) close to the fixed rod (472) can be inserted into the movable hole (431); and one end of the swing rod (473) away from the fixed rod (472) can be rotatably connected to the outer wall of the moving block (46).

8. A positive pressure pneumatic conveying method, using the positive pressure pneumatic conveying device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. When it is necessary to transport materials, on the one hand, the materials will fall into the discharge member (14) through the feed bin (15), and then fall into the feed pipe (13) through the uniform rotation of the discharge member (14). On the other hand, the main blower (12) is started, and air enters the main blower (12) from the air inlet of the main blower (12), is accelerated by the impeller, and then is discharged from the air outlet of the main blower (12), forming an air flow, thereby transporting and displacing the materials that fall into the feed pipe (13); S2. After the material is transported to the first transport pipe (16), a portion of the hot air flow will enter the space between the regulating cylinder (31) and the first transport pipe (16) along the transport direction, so that a portion of the hot air flow is discharged. Subsequently, the micro motor (37) is started to drive the second bevel gear ring (36) to rotate in one direction, so that the first bevel gear ring (34) can swing along with the rotation of the second bevel gear ring (36), and the rotating shaft (33) and the rotating plate (35) also swing synchronously, so that the two ends of the rotating plate (35) can synchronously close the positions where the hot air flow enters and is discharged, while the positions where the external cold air can enter and is discharged are synchronously opened, and enter the first transport pipe (16) to neutralize the hot air flow inside the first transport pipe (16), so that the temperature inside the first transport pipe (16) can be kept at a normal material transport temperature; the other portion of the air flow will continue to carry the material along the direction of the air flow for transport and displacement; S3, when the micro motor (37) is started again and drives the second bevel gear ring (36) to rotate in the other direction, the two ends of the rotating plate (35) will again synchronously close the positions for the entry and discharge of external cold air, and the hot air flow in the first conveying pipe (16) will be discharged again; S4. When the material enters the second conveying pipe (17), on the one hand, the airflow passes through the filter pipe (23) into the space between the second conveying pipe (17) and the inner pipe (21), and continues to be conveyed upward; on the other hand, the feeding motor (28) is started, and its output end drives the spiral shaft (24) to rotate through the connecting piece (27), and the spiral blade (25) also rotates accordingly, so that the spiral blade (25) can convey the material driven by the airflow upward in a spiral manner, so that the material moves upward along the rotation of the spiral blade (25); S5. When the material moves from the inner tube (21) to the top, the airflow contacts the material again, and continues to blow the material from the second conveying pipe (17) and conveys it to the storage bin (19) through the discharge pipe (18).

Images