Grain pump truck

Abstract

The invention relates to the technical field of grain pump trucks, in particular to a grain pump truck. Comprising a machine body, a stock bin, a motor, a dust suction pump, a telescopic arm, an air inlet fan, a pump tank and an inner frame, the stock bin, the motor, the dust suction pump, the telescopic arm, the air inlet fan, the pump tank and the inner frame are installed on the machine body, a swing frame is hinged to the inner frame, and a swing driving mechanism for driving the swing frame to swing by + / -35 degrees is arranged on the inner frame; the discharging shaft and the rotary feeding cylinder are driven by a motor, dust collection holes communicated with a dust collection pump are formed in the inner wall and the outer wall of the negative pressure cylinder in an array mode, a corrugated conical cylinder fixedly connected with the stock bin is rotationally installed at the bottom of the rotary feeding cylinder, six feeding ports are formed in the bottom of the rotary feeding cylinder, and six material guiding ports are formed in the upper portion of the negative pressure cylinder. The grain pump truck has the beneficial effects that aiming at the problem that dust removal and anti-blocking design of an existing grain pump truck are separated from each other, a multi-component linkage cooperation mechanism is constructed, and the limitation of traditional single optimization is eliminated.

Description

Technical Field

[0001] This invention relates to the field of grain pump truck technology, specifically to a grain pump truck. Background Technology

[0002] With the rapid development of the grain storage and logistics industry, grain pump trucks, as core equipment for efficient grain transfer, are widely used in grain yards, warehouses, ports, and other scenarios for grain loading and unloading and cross-regional transfer operations. Among existing technologies, patent document CN114955562A discloses a grain pump truck. This pump truck utilizes a mobile chassis, grain conveying pipeline, grain inlet pipeline, pneumatic conveying components, and a rotary feeder working in synergy to achieve grain transfer and transportation. It features a short transport route, strong resilience, and an alignment mechanism that ensures the grain conveying pipeline can be aligned with the grain receiving pipeline to prevent grain spillage. It is highly practical and suitable for widespread promotion and application. However, the above-mentioned pump truck has the following technical problems in its use: The dust removal and anti-clogging designs of existing grain pump trucks are generally in a state of single optimization and mutual isolation, and the airflow energy utilization rate is low, resulting in multiple technical contradictions that are difficult to reconcile. In terms of dust removal, traditional equipment mostly adopts independent dust collection devices or fixed screen filtration structures. Since grain is mostly in a static accumulation or simple horizontal movement state during transportation, the dust attached to the surface and the fine impurities in the gaps between particles are difficult to be fully removed, resulting in the dust removal efficiency remaining at a low level for a long time. In terms of anti-clogging, grain is prone to caking due to compression and moisture during storage and transportation. Traditional screw conveyor or pneumatic conveyor methods lack an effective dynamic loosening mechanism. Caking grain and unremoved impurities are very likely to accumulate and clog at the feed inlet, the bend of the conveying pipeline, or the distribution port, causing the transportation to be interrupted and seriously affecting the continuity of operation. Based on this, the present invention provides a grain pump truck to solve the problems mentioned in the background art. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing a grain pump truck that solves the problem that the dust removal and anti-clogging designs of existing grain pump trucks are generally in a state of single optimization and mutual isolation, and that the airflow energy utilization rate is low, resulting in multiple technical contradictions that are difficult to reconcile.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A grain pump truck includes a body and a hopper, a motor, a dust pump, a telescopic arm, an air intake fan, a pump tank, and an inner frame mounted thereon. A swing frame is hinged to the inner frame and equipped with a swing drive mechanism that drives the swing frame to swing ±35°. A negative pressure cylinder is fixedly mounted on the swing frame. A rotating feed cylinder is rotatably mounted on the negative pressure cylinder. An agitator is arrayed on the rotating feed cylinder. A discharge shaft is rotatably mounted at the axial position of the negative pressure cylinder. Both the discharge shaft and the rotating feed cylinder are driven by a motor. Dust suction holes communicating with the dust pump are arrayed on the inner and outer walls of the negative pressure cylinder. A corrugated cone cylinder fixedly connected to the hopper is rotatably mounted at the bottom of the rotating feed cylinder and has six feed inlets. Six guide ports are opened at the upper part of the negative pressure cylinder. Spiral conveyor screens are installed on the inner wall and the feeding shaft. Dust removal screen holes are evenly distributed on the spiral conveyor screens. A conveying cylinder is installed at the axis of the pump tank. A flexible connecting pipe connects the conveying cylinder and the negative pressure cylinder. A conveying shaft driven by a motor is rotatably installed on the conveying cylinder. Spiral lifting blades are installed on the conveying shaft, and a centrifugal cylinder and four elastic dispersing rods are installed on its top. The centrifugal cylinder is rotatably connected to the conveying cylinder. A throwing cone is installed on the centrifugal cylinder. Arc-shaped throwing blades are evenly distributed on the throwing cone. Six material distribution ports are provided on the centrifugal cylinder and at the positions corresponding to the elastic dispersing rods and the throwing cone. A high-pressure air chamber is provided inside the pump tank. The air outlet of the inlet fan is connected to the high-pressure air chamber. A corrugated conveying pipe is connected to the top of the pump tank. A circulating return air device is provided on the corrugated conveying pipe.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] As a preferred technical solution of the present invention, a bracket is installed on the pump tank, the telescopic arm is hinged to the bracket, two electric push rods are hinged on the pump tank, the piston ends of the two electric push rods are both hinged to the telescopic arm, a central control module is installed on the end face of the machine body, four universal casters are installed on the bottom surface of the machine body, and a grain inlet is opened on the hopper.

[0007] As a preferred embodiment of the present invention, the swing drive mechanism includes a synchronous shaft and two transmission shafts rotatably connected to the inner frame. The output shaft end of the motor is driven by a first synchronous toothed belt. Both transmission shafts are driven by the first synchronous toothed belt. Notched gears are installed on both transmission shafts. Synchronous gears are installed on the synchronous shaft. The effective meshing sections of the two notched gears are alternately meshed with the synchronous gears. Hinge sleeves that are hinged to the inner frame are installed on both sides of the swing frame. Two second synchronous toothed belts are driven by the synchronous shaft. The two second synchronous toothed belts are driven by the two hinge sleeves respectively.

[0008] As a preferred technical solution of the present invention, the two transmission shafts are respectively disposed on the upper and lower sides of the synchronous shaft, the center angle corresponding to the effective meshing tooth segment on the notched gear is 35°, the effective meshing tooth segments on the two notched gears are staggered by 180°, two guide arc grooves are provided on the inner frame, and guide sliders are installed on both sides of the swing frame. The two guide sliders are slidably connected to the two guide arc grooves respectively, and the arc center of the guide arc groove is on the axis of the hinge sleeve.

[0009] As a preferred technical solution of the present invention, a first round shaft is rotatably mounted on the swing frame, and a first bevel gear is mounted on both the first round shaft and the rotating feed cylinder. The two first bevel gears are orthogonally meshed. An elastic transmission belt is driven to the output shaft end of the motor. The elastic transmission belt is driven to the first round shaft. The elastic transmission belt is made of rubber and elastically compensates for the relative displacement between the first round shaft and the motor. A second round shaft is mounted on the upper part of the negative pressure cylinder. A third bevel gear is mounted on the second round shaft. A fourth bevel gear is mounted on both the feeding shaft and the rotating feed cylinder. The two fourth bevel gears are driven to the third bevel gear. The two fourth bevel gears are symmetrically arranged about the horizontal plane of the axis of the second round shaft.

[0010] As a preferred technical solution of the present invention, the negative pressure cylinder has a negative pressure suction chamber inside, the dust suction hole is connected to the negative pressure suction chamber, the axis of the dust suction hole is perpendicular to the axis of the rotating feed cylinder, the dust suction end of the dust pump is connected to a pipe, and the other end of the pipe is connected to the negative pressure suction chamber.

[0011] As a preferred technical solution of the present invention, a gear shaft is rotatably connected to the bottom of the conveying cylinder, and a third gear belt is driven to the output shaft end of the motor. The third gear belt is driven to the gear shaft, and a fifth bevel gear is installed on both the gear shaft and the conveying shaft. The two fifth bevel gears mesh orthogonally.

[0012] As a preferred technical solution of the present invention, the air outlet port of the air inlet fan is connected to an air guide pipe, the air outlet port of the air guide pipe is connected to an air distribution duct, and the end face of the air distribution duct facing the high-pressure air chamber is evenly distributed with flow equalization mesh holes, and the air distribution duct is connected to the high-pressure air chamber through this end face.

[0013] As a preferred technical solution of the present invention, the circulating return air device includes an exhaust fan installed on a bracket and a pump outlet pipe installed on a telescopic arm. The exhaust fan's outlet port is connected to the high-pressure air chamber through a one-way outlet pipe. A corrugated through pipe is installed at the axial position of the corrugated conveying pipe. One end of the corrugated through pipe is sealed and connected to the exhaust fan's inlet through a clamp, and the other end is connected to a return air pipe through a clamp. The return air pipe is connected to the pump outlet pipe, and gas-solid separation screen holes are evenly distributed at the connection point between the two.

[0014] As a preferred technical solution of the present invention, the end of the pump outlet pipe is provided with a discharge elbow, the angle between the axis of the discharge elbow and the axis of the pump outlet pipe is 45°, and the axis of the gas-solid separation screen is parallel to the axis of the pump outlet pipe.

[0015] The beneficial effects of this invention are: 1. This invention addresses the problem of the disconnect between dust removal and anti-clogging design in existing grain pump trucks by constructing a multi-component collaborative mechanism. It overcomes the limitations of traditional single-component optimization, using a swing drive mechanism to drive the swing frame to achieve ±35° reciprocating swing, which synchronizes the movement of the negative pressure cylinder and the rotating feed cylinder. This creates a horizontal and vertical composite vibration state on the inner wall of the rotating feed cylinder and the spiral conveying screen blades on the feeding shaft. This vibration not only breaks up the static accumulation of grain, allowing surface dust and intergranular impurities to be fully stripped, but also accelerates the passage of impurities through the dust removal screen holes on the screen blades. Simultaneously, the array of dust suction holes on the inner and outer walls of the negative pressure cylinder connects with the dust suction pump to form a full-area negative pressure field, achieving three-stage collaborative dust removal: vibration stripping, screen filtration, and negative pressure adsorption. Compared to traditional independent dust suction or fixed screen structures, the dust removal efficiency is significantly improved, effectively ensuring grain purity. Furthermore, the composite vibration and the conveying action of the spiral conveying screen blades are synchronized, eliminating the need for additional equipment and achieving an organic integration of conveying and purification functions. This solves the problems of functional disconnect and cumbersome operation processes in existing technologies.

[0016] 2. Addressing the technical problems of easy agglomeration and blockage in grain storage and transportation, this invention designs a full-process dynamic loosening and precise diversion structure, overcoming the lack of an effective loosening mechanism in traditional conveying methods. The array of stirring rods on the rotating feed cylinder can pre-stir and turbulent the grain in the hopper, avoiding initial accumulation. The composite vibration energy breaks up grain agglomerates through high-frequency impact, and combined with the pushing force of the spiral conveyor screen, it prevents grain from lingering at the feed inlet and guide inlet. After the grain enters the centrifugal drum, four elastic dispersing rods flexibly disperse any remaining agglomerates, and then the arc-shaped throwing plates on the throwing cone evenly guide the grain to six distribution ports, forming a three-level anti-blocking system of pre-stirring, dynamic loosening, and precise diversion. This system works in conjunction with the uniform airflow of the high-pressure air chamber, allowing the grain to enter the high-pressure air chamber in a ring-shaped uniform material curtain state, avoiding pipe blockage caused by local accumulation. This solves the problem of easy blockage at the feed inlet, conveying pipe bends, and distribution ports of existing equipment, ensuring continuous and stable operation. Its dynamic collaborative anti-blocking design is significantly different from the passive anti-blocking methods of traditional spiral or pneumatic conveying.

[0017] 3. To address the problem of low energy utilization rate of existing equipment, this invention designs a closed-loop circulating return air device, constructing an energy cycle system of airflow conveying, gas-solid separation, and recycling. A gas-solid separation screen is installed at the connection between the pump outlet pipe and the return air pipe to accurately separate grain and airflow, preventing grain from flowing back with the airflow. The exhaust fan recovers the separated airflow to the high-pressure air chamber through a corrugated pipe, working in conjunction with the fresh air supplied by the intake fan to supplement the airflow power. Compared with the traditional design of directly discharging airflow, this significantly reduces energy consumption. Simultaneously, the flow equalization mesh on the air distribution duct ensures that the airflow is evenly distributed to the high-pressure air chamber, ensuring stable suspension and conveying of grain in the airflow field, avoiding conveying fluctuations caused by uneven airflow. The flexible structure of the corrugated conveying pipe, combined with the angle adjustment function of the telescopic arm, can adapt to the unloading needs of different operating scenarios. This airflow circulation design not only improves energy utilization rate but also reduces the disturbance to the working environment caused by direct airflow discharge, solving the problems of energy waste and poor environmental adaptability in existing technologies. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a grain pump truck; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 for Figure 2 A magnified view of the structure at point B in the middle; Figure 5 for Figure 2 A magnified schematic diagram of the local structure at point C; Figure 6 This is a schematic diagram of the gas-solid separation screen and the discharge elbow. Figure 7 A schematic diagram of the pump tank and electric actuator; Figure 8 for Figure 7 A magnified schematic diagram of the local structure at point D; Figure 9 This is a structural diagram of the hopper and the feeding shaft.

[0019] The attached diagram lists the components represented by each number as follows: 1. Machine body; 2. Hopper; 3. Motor; 4. Dust pump; 5. Telescopic arm; 6. Air intake fan; 7. Pump tank; 8. Inner frame; 9. Swing frame; 10. Negative pressure cylinder; 11. Rotary feed cylinder; 12. Stirring rod; 13. Discharge shaft; 14. Dust suction hole; 15. Corrugated cone; 16. Feed inlet; 17. Guide port; 18. Spiral conveyor screen; 19. Flow equalization mesh; 20. Conveyor cylinder; 21. Flexible connecting pipe; 22. Conveyor shaft; 23. Spiral lifting blade; 24. Centrifugal vortex; 25. Elastic dispersing bar; 26. Discharge cone; 27. Distribution port; 2 8. High-pressure air chamber; 29. ​​Corrugated conveyor pipe; 30. Grain inlet; 31. Pump outlet pipe; 32. Return air pipe; 33. Gas-solid separation screen; 34. Support; 35. Electric actuator; 36. Central control module; 37. Synchronous shaft; 38. Drive shaft; 39. Notched gear; 40. Synchronous gear; 41. Hinge sleeve; 42. Guide arc groove; 43. First round shaft; 44. Elastic transmission belt; 45. Second round shaft; 46. Negative pressure suction chamber; 47. Air guide pipe; 48. Air distribution duct; 49. Exhaust fan; 50. Corrugated through pipe; 51. Discharge elbow; 52. Gear shaft. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] The present invention provides the following preferred embodiments. like Figure 1-9 As shown, a grain pump truck includes a body 1 and a hopper 2, a motor 3, a dust pump 4, a telescopic boom 5, an air intake fan 6, a pump tank 7 and an inner frame 8 installed thereon. The hopper 2 is provided with a grain inlet 30. A bracket 34 is installed on the pump tank 7, and the telescopic arm 5 is hinged to the bracket 34. Two electric push rods 35 are hinged on the pump tank 7, and the piston ends of the two electric push rods 35 are hinged to the telescopic arm 5. A central control module 36 is installed on the end face of the machine body 1, and four omnidirectional casters are installed on the bottom surface of the machine body 1. The bracket 34 on the pump tank 7 provides a stable hinge base for the telescopic arm 5. With the piston end drive of the two electric push rods 35, the swing angle and telescopic length of the telescopic arm 5 can be flexibly adjusted, thereby precisely changing the discharge position of the pump outlet pipe 31 to adapt to the unloading needs of grain piles, grain silos and other different operating scenarios. The central control module 36 on the end face of the machine body 1 can centrally regulate the operating parameters of the motor 3, electric push rod 35, dust pump 4 and other core components, reducing the cumbersomeness of decentralized operation and improving work efficiency. The four swivel casters on the bottom of the machine body 1 break through the limitations of fixed operation, allowing the grain pump truck to be flexibly moved in grain yards, warehouses and other sites, and adapt to continuous operation in multiple locations; The grain inlet 30 on the silo 2 facilitates rapid replenishment of grain, avoids operational interruptions due to material shortages, and ensures the continuity of the overall conveying process. The inner frame 8 is hinged to a swing frame 9 and is equipped with a swing drive mechanism that drives the swing frame 9 to swing ±35°. The swing drive mechanism includes a synchronous shaft 37 and two transmission shafts 38 on the inner frame 8. The output shaft end of the motor 3 is connected to a first synchronous toothed belt. Both transmission shafts 38 are connected to the first synchronous toothed belt. Notched gears 39 are installed on both transmission shafts 38. Synchronous gears 40 are installed on the synchronous shaft 37. The effective meshing sections of the two notched gears 39 are alternately meshed with the synchronous gears 40. Two drive shafts 38 are respectively set on the upper and lower sides of the synchronous shaft 37. The center angle corresponding to the effective meshing tooth segment on the notched gear 39 is 35°. The effective meshing tooth segments on the two notched gears 39 are staggered by 180°. The two sides of the swing frame 9 are equipped with hinge sleeves 41 that are hinged to the inner frame 8. Two second synchronous toothed belts are driven and connected to the synchronous shaft 37, and the two second synchronous toothed belts are driven and connected to the two hinge sleeves 41 respectively. Two guide arc grooves 42 are provided on the inner frame 8. Guide sliders are installed on both sides of the swing frame 9. The two guide sliders are slidably connected to the two guide arc grooves 42 respectively. The arc center of the guide arc groove 42 is on the axis of the hinge sleeve 41. The motor 3 drives two transmission shafts 38 distributed vertically to rotate synchronously via the first synchronous toothed belt. The notched gears 39 with a center angle of 35° and a 180° misalignment on the transmission shafts 38 alternately mesh with the synchronous gears 40 of the synchronous shaft 37, which can drive the synchronous shaft 37 to achieve intermittent rotation in both directions. The rotation is then transmitted to the hinge sleeves 41 on both sides of the swing frame 9 via the second synchronous toothed belt, which ultimately drives the swing frame 9 to achieve a stable ±35° swing, avoiding the blind spot in feeding caused by the unidirectional rotation of the swing frame 9. Meanwhile, the guide arc groove 42 of the inner frame 8 and the guide slider of the swing frame 9 slide together, which can accurately limit the swing trajectory of the swing frame 9 and prevent deviation or shaking during the swing process. By reciprocating the swing frame 9, the two spiral conveyor screens 18 can form a composite vibration state in both horizontal and vertical states when conveying grain. The composite vibration keeps the grain particles in a dynamic and loose state. The horizontal oscillation breaks the static accumulation of grain, and the vertical micro-vibration causes continuous relative displacement between particles. Dust and small particulate impurities that were originally adsorbed on the surface of the grain or wrapped in the gaps between particles are fully stripped off. At the same time, the vibration can accelerate the passage of impurities through the dust removal screen holes on the spiral conveyor screen 18. Combined with the negative pressure field formed by the dust suction holes 14 on the inner and outer walls of the negative pressure cylinder 10, the synergistic dust removal of vibration stripping and negative pressure adsorption is achieved. The impurity separation efficiency is improved compared with the traditional single conveying method, effectively ensuring the cleanliness of the grain output.

[0022] Grains are prone to clumping due to compression and moisture during storage and transportation. Traditional spiral conveying methods are difficult to effectively break this clumping structure. Composite vibration energy breaks the clumping structure through high-frequency impact, keeping the grain in a loose state. At the same time, the impact force generated by the vibration can counteract the adhesion of the grain in the conveying path, preventing the grain from being stuck on the feed inlet 16, the guide inlet 17 or the spiral blades, thus solving the conveying blockage problem at its source and improving the operational stability of the equipment.

[0023] The composite vibration organically combines the conveying power and the purification power, eliminating the need for additional vibration devices and reducing equipment energy consumption. While completing the grain conveying, the spiral conveyor screen 18 simultaneously achieves impurity separation through vibration, avoiding the cumbersome process of conveying first and then removing dust, greatly improving the overall operating efficiency of the equipment, and realizing the integrated function of conveying and purification. Compared with traditional separation equipment, it has a more compact structure and a simpler operating process. The dust removal screen holes and dust suction holes 14 are both smaller than the particle size of the grain to be conveyed, and the dust removal screen holes are arranged in parallel with the negative pressure cylinder 10. A negative pressure cylinder 10 is fixedly installed on the swing frame 9. A rotating feed cylinder 11 is rotatably sleeved on the negative pressure cylinder 10. A stirring rod 12 is arrayed on the rotating feed cylinder 11. A feeding shaft 13 is rotatably installed at the axial position of the negative pressure cylinder 10. Both the feeding shaft 13 and the rotating feed cylinder 11 are driven by the motor 3. The stirring rod 12 is used to stir and turbulent the grain stored in the silo 2 to promote the flow of materials in the silo 2 and avoid material blockage. A first round shaft 43 is rotatably mounted on the swing frame 9. A first bevel gear is mounted on both the first round shaft 43 and the rotating feed cylinder 11. The two first bevel gears mesh orthogonally. An elastic transmission belt 44 is connected to the output shaft of the motor 3. The elastic transmission belt 44 is connected to the first round shaft 43. The elastic transmission belt 44 is made of rubber and provides elastic compensation for the relative displacement between the first round shaft 43 and the motor 3. A second round shaft 45 is mounted on the upper part of the negative pressure cylinder 10. A third bevel gear is mounted on the second round shaft 45. A fourth bevel gear is mounted on both the feeding shaft 13 and the rotating feed cylinder 11. The two fourth bevel gears are connected to the third bevel gears. The two fourth bevel gears are symmetrically arranged about the horizontal plane where the axis of the second round shaft 45 is located. The motor 3 drives the first round shaft 43 through the elastic transmission belt 44 made of rubber. The elastic transmission belt 44 can automatically compensate for the installation error or running vibration displacement between the first round shaft 43 and the motor 3, avoiding the jamming and toothed belt wear problems that are easy to occur in rigid transmission. With the orthogonal meshing of the first bevel gear, it ensures the stable rotation of the rotating feed cylinder 11. The second circular shaft 45 on the upper part of the negative pressure cylinder 10 is driven by the third bevel gear and the fourth bevel gear of the feeding shaft 13 and the rotating feeding cylinder 11, so that the feeding shaft 13 and the rotating feeding cylinder 11 are synchronized and rotate in a compatible direction. The array of stirring rods 12 on the rotating feeding cylinder 11 can stir and disturb the grain in the hopper 2, break the static accumulation structure of the grain, and reduce the discharge blockage from the root. The feeding shaft 13 and the spiral conveying screen 18 on the inner wall of the rotating feeding cylinder 11 work together to transport the grain in an orderly manner to the guide port 17 at the top of the negative pressure cylinder 10, avoiding the grain from being stuck in the conveying path and significantly improving the feeding efficiency and smoothness of the conveying. The inner and outer walls of the negative pressure cylinder 10 are both provided with suction holes 14 that communicate with the suction pump 4; The negative pressure cylinder 10 has a negative pressure suction chamber 46 inside, and the dust suction hole 14 is connected to the negative pressure suction chamber 46. The axis of the dust suction hole 14 is perpendicular to the axis of the rotating feed cylinder 11. The dust suction end of the dust pump 4 is connected to a pipe, and the other end of the pipe is connected to the negative pressure suction chamber 46. The bottom of the rotary feed cylinder 11 is rotatably mounted with a corrugated cone cylinder 15 that is fixedly connected to the hopper 2, and has six feed ports 16. The corrugated cone cylinder 15 is fixedly connected to the hopper 2. The corrugated cone 15 is made of rubber. The corrugated cone 15 deforms responsively as the rotating feed cylinder 11 and the swing frame 9 move. Through the setting of the corrugated cone 15, the grain in the hopper 2 is guided to the feed inlet 16. The upper part of the negative pressure cylinder 10 is provided with six guide ports 17. The inner wall of the rotating feed cylinder 11 and the feed shaft 13 are both equipped with spiral conveying screens 18, and dust removal screen holes are evenly distributed on the spiral conveying screens 18. The conveying direction of the spiral conveyor screen 18 at the rotating feed cylinder 11 is upward, and the conveying direction of the spiral conveyor screen 18 on the discharge shaft 13 is downward. The dust pump 4 is connected to the negative pressure suction chamber 46 inside the negative pressure cylinder 10 through a pipe. The negative pressure suction chamber 46 generates uniform negative pressure through the array of dust suction holes 14 with the axis perpendicular to the rotating feed cylinder 11. It can efficiently adsorb dust, particles and other impurities generated during grain conveying, reduce dust pollution to the working environment and wear on equipment bearings, gears and other parts. The rubber corrugated cone 15 at the bottom of the rotating feed cylinder 11 can adapt to the movement of the swing frame 9 and the rotating feed cylinder 11, closely fit the inner wall of the hopper 2 and guide the grain to the six feed ports 16, avoiding waste caused by grain scattering and improving the concentration of feeding. The dust removal screen holes on the spiral conveyor screen 18 can filter out small impurities in the grain, making it easier for the impurities to be adsorbed by the dust suction holes 14, thereby further improving the cleanliness of the grain. At the same time, the upward conveying of the spiral conveyor screen 18 of the rotating feed cylinder 11 and the downward conveying of the spiral conveyor screen 18 of the discharge shaft 13 are coordinated to form a reasonable material flow path, prevent the grain from accumulating in the negative pressure cylinder 10, and ensure the continuity of the conveying process. A conveying cylinder 20 is installed at the axial position of the pump tank 7. A flexible connecting pipe 21 connects the conveying cylinder 20 and the negative pressure cylinder 10. A conveying shaft 22 driven by a motor 3 is rotatably installed on the conveying cylinder 20. The bottom of the conveying cylinder 20 is rotatably connected to a gear shaft 52, and the output shaft end of the motor 3 is driven by a third toothed belt. The third toothed belt is driven by the gear shaft 52. Both the gear shaft 52 and the conveying shaft 22 are equipped with fifth bevel gears, and the two fifth bevel gears mesh orthogonally. A spiral lifting blade 23 is installed on the conveying shaft 22, and a centrifugal cylinder 24 and four elastic dispersing rods 25 are installed on its top. The centrifugal cylinder 24 is rotatably connected to the conveying cylinder 20. A throwing cone 26 is installed on the centrifugal cylinder 24, and arc-shaped throwing blades are evenly distributed on the throwing cone 26. Six material distribution ports 27 are provided on the centrifugal cylinder 24 and at the positions corresponding to the elastic dispersing rods 25 and the throwing cone 26. A high-pressure air chamber 28 is provided inside the pump tank 7, and the air outlet of the blower 6 is connected to the high-pressure air chamber 28. The air outlet of the air inlet fan 6 is connected to the air guide pipe 47, and the air outlet of the air guide pipe 47 is connected to the air distribution duct 48. The end face of the air distribution duct 48 facing the high pressure chamber 28 is evenly distributed with flow equalization mesh holes 19, and the air distribution duct 48 is connected to the high pressure chamber 28 through this end face. Motor 3 drives the gear shaft 52 at the bottom of conveying cylinder 20 through the third toothed belt. The gear shaft 52 meshes orthogonally with the fifth bevel gear of conveying shaft 22 to ensure stable rotation of conveying shaft 22. The spiral lifting blade 23 on conveying shaft 22 can continuously lift the grain conveyed by flexible connecting pipe 21 to centrifugal drum 24 to prevent grain from settling in conveying cylinder 20. The four elastic dispersing rods 25 inside the centrifugal drum 24 can gently disperse clumps of grain to prevent lumps of grain from clogging the feeding port 27. Together with the arc-shaped feeding plate on the feeding cone 26, the grain can be evenly thrown to the six feeding ports 27. The air intake fan 6 delivers air to the air distribution duct 48 through the air guide duct 47. The flow equalization mesh 19 on the end face of the air distribution duct 48 can evenly distribute the airflow to the high-pressure air chamber 28, avoiding the grain conveying speed from fluctuating due to uneven airflow. The stable airflow generated by the high-pressure air chamber 28 can quickly push the grain discharged from the centrifugal drum 24 to the corrugated conveying pipe 29, significantly improving the grain conveying speed and conveying height, and meeting the needs of long-distance, high-position grain transfer. After the grain is conveyed to the centrifugal drum 24 by the spiral lifting blade 23, if it is directly piled up at the bottom of the drum or in a local area, it is easy to form a material arch due to gravity compression. That is, the grain particles interlock to form a stable pile structure, which in turn blocks the feed port 27. The throwing cone 26 has a conical structure and is evenly distributed with arc-shaped throwing blades around its circumference. When it rotates synchronously with the centrifugal drum 24, the conical surface can first transform the columnar material conveyed by the spiral lifting blade 23 into a radially divergent material flow. As the grain slides down the conical surface, it is further dispersed by the rotating arc-shaped throwing blades and evenly pushed towards the inner wall of the centrifugal drum 24, avoiding the grain from being concentrated and piled up near a certain feed port 27 in the centrifugal drum 24. This combination of conical flow guidance and arc-shaped throwing design eliminates the blockage of the feed port 27 caused by excessive local grain.

[0024] The core function of the high-pressure air chamber 28 is to push the grain from the feed inlet 27 to the corrugated conveying pipe 29 through airflow. If the grain is unevenly distributed when it enters the high-pressure air chamber 28, it will cause an imbalance in the driving force of the airflow on the grain. The grain in some areas will slow down due to insufficient airflow coverage, or even stagnate at the junction of the pump tank 7 and the corrugated conveying pipe 29, forming a blockage. The cone-shaped structure of the feeding cone 26 and the evenly distributed arc-shaped feeding plates enable the grain to enter the high-pressure air chamber 28 in a ring-shaped uniform material curtain state when it is discharged from the six feeding ports 27. The annular material curtain is perfectly matched with the annular airflow field of the high-pressure air chamber 28. The airflow can act evenly on each part of the grain particles, avoiding insufficient airflow penetration due to excessively dense grain in some areas or airflow waste due to excessively sparse grain in some areas. This precise matching of material flow pattern and airflow pattern ensures that the grain always maintains a stable suspended conveying state in the high-pressure air chamber 28, eliminating the problems of airflow not being able to push and grain blocking the pipe. The top of the pump tank 7 is connected to a corrugated conveying pipe 29, and a circulating return air device is provided on the corrugated conveying pipe 29.

[0025] The pump outlet pipe 31 is provided with a discharge elbow 51 at its end. The angle between the axis of the discharge elbow 51 and the axis of the pump outlet pipe 31 is 45°. The axis of the gas-solid separation screen 33 is parallel to the axis of the pump outlet pipe 31.

[0026] The circulating return air device includes an exhaust fan 49 mounted on a bracket 34 and a pump outlet pipe 31 mounted on a telescopic arm 5. The exhaust port of the exhaust fan 49 is connected to the high-pressure air chamber 28 through a one-way exhaust pipe. A corrugated through pipe 50 is installed at the axial position of the corrugated conveying pipe 29. One end of the corrugated through pipe 50 is sealed and connected to the air inlet of the exhaust fan 49 through a clamp, and the other end is connected to the return air pipe 32 through a clamp. The return air pipe 32 is connected to the pump outlet pipe 31, and gas-solid separation screen holes 33 are evenly distributed at the connection between the two.

[0027] The discharge elbow 51 at the end of the pump outlet pipe 31 with a 35° included angle can flexibly change the grain discharge direction, adapting to different operating scenarios such as horizontal unloading and inclined storage, thus improving operational flexibility. The gas-solid separation screen 33 at the connection between the pump outlet pipe 31 and the return air pipe 32 can accurately separate grain and airflow, so that the grain can be smoothly discharged from the discharge elbow 51, avoiding waste caused by the airflow carrying grain particles back; Traditional grain pump trucks directly discharge the gas-solid separated airflow, which disturbs the surrounding grain pile, causing the surface particles of the grain pile to scatter, affecting the uniformity of grain distribution and increasing grain loss. In the circulating return air device, the exhaust fan 49 on the bracket 34 transports the airflow in the return air pipe 32 back to the material bin 2 through the corrugated pipe 50 sealed by clamps at both ends, realizing the recycling of airflow, reducing the energy consumption of the continuous air supply of the intake fan 6, and avoiding environmental airflow disturbance caused by direct airflow discharge. The flexible structure of the corrugated pipe 50 can adapt to the movement of the pump outlet pipe 31 and the telescopic arm 5, ensuring that the return air passage is always sealed and preventing airflow leakage from affecting the circulation efficiency.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grain pump truck, comprising a body (1) and a hopper (2), a motor (3), a dust pump (4), a telescopic boom (5), an air intake fan (6), a pump tank (7), and an inner frame (8) mounted thereon, characterized in that, The inner frame (8) is hinged to a swing frame (9) and is equipped with a swing drive mechanism that drives the swing frame (9) to swing ±35°. A negative pressure cylinder (10) is fixedly installed on the swing frame (9). A rotating feed cylinder (11) is rotatably sleeved on the negative pressure cylinder (10). A discharge shaft (13) is installed on the negative pressure cylinder (10). Both the discharge shaft (13) and the rotating feed cylinder (11) are driven by a motor (3). The inner and outer walls of the negative pressure cylinder (10) are arrayed with dust suction holes (14) that communicate with the dust suction pump (4). The bottom of the rotating feed cylinder (11) is rotatably installed with a corrugated cone cylinder (15) that is fixedly connected to the hopper (2) and has six feed ports (16). The upper part of the negative pressure cylinder (10) has six guide ports (17). The inner wall of the rotating feed cylinder (11) and the discharge shaft (13) are both equipped with spiral conveying screens (18). The pump tank (7) has dust removal screen holes evenly distributed on it. A conveying cylinder (20) is installed on the pump tank (7). A flexible connecting pipe (21) connects the conveying cylinder (20) and the negative pressure cylinder (10). A conveying shaft (22) driven by a motor (3) is rotatably installed on the conveying cylinder (20). A spiral lifting blade (23) is installed on the conveying shaft (22), and a centrifugal vortex (24) and four elastic dispersing rods (25) are installed on its top. The centrifugal vortex (24) is rotatably connected to the conveying cylinder (20). A material throwing cone (26) is installed on the centrifugal vortex (24). Six material distribution ports (27) are provided on the centrifugal vortex (24). A high-pressure air chamber (28) is provided inside the pump tank (7). The air outlet of the blower (6) is connected to the high-pressure air chamber (28). A corrugated conveying pipe (29) is connected to the top of the pump tank (7). A circulating return air device is provided on the corrugated conveying pipe (29).

2. A grain pump truck according to claim 1, characterized in that, A bracket (34) is installed on the pump tank (7), the telescopic arm (5) is hinged to the bracket (34), two electric push rods (35) are hinged on the pump tank (7), the piston ends of the two electric push rods (35) are hinged to the telescopic arm (5), a central control module (36) is installed on the end face of the machine body (1), four universal casters are installed on the bottom surface of the machine body (1), a grain inlet (30) is opened on the hopper (2), arc-shaped throwing plates are evenly distributed on the throwing cone (26), and stirring rods (12) are arrayed on the rotating feed cylinder (11).

3. A grain pump truck according to claim 2, characterized in that, The swing drive mechanism includes a synchronous shaft (37) and two drive shafts (38) rotatably connected to the inner frame (8). The output shaft end of the motor (3) is connected to a first synchronous toothed belt. Both drive shafts (38) are connected to the first synchronous toothed belt. Notched gears (39) are installed on both drive shafts (38). Synchronous gears (40) are installed on the synchronous shaft (37). The effective meshing sections of the two notched gears (39) are alternately meshed with the synchronous gears (40). Hinges (41) that are hinged to the inner frame (8) are installed on both sides of the swing frame (9). Two second synchronous toothed belts are connected to the synchronous shaft (37). The two second synchronous toothed belts are connected to the two hingees (41) respectively.

4. A grain pump truck according to claim 3, characterized in that, The two drive shafts (38) are respectively set on the upper and lower sides of the synchronous shaft (37). The center angle corresponding to the effective meshing tooth segment on the notched gear (39) is 35°. The effective meshing tooth segments on the two notched gears (39) are staggered by 180°. Two guide arc grooves (42) are opened on the inner frame (8). Guide sliders are installed on both sides of the swing frame (9). The two guide sliders are slidably connected to the two guide arc grooves (42) respectively. The arc center of the guide arc groove (42) is on the axis of the hinge sleeve (41).

5. A grain pump truck according to claim 1, characterized in that, A first round shaft (43) is rotatably mounted on the swing frame (9). A first bevel gear is mounted on both the first round shaft (43) and the rotating feed cylinder (11). The two first bevel gears mesh orthogonally. An elastic transmission belt (44) is connected to the output shaft of the motor (3). The elastic transmission belt (44) is connected to the first round shaft (43). The elastic transmission belt (44) is made of rubber and provides elastic compensation for the relative displacement between the first round shaft (43) and the motor (3). A second round shaft (45) is mounted on the upper part of the negative pressure cylinder (10). A third bevel gear is mounted on the second round shaft (45). A fourth bevel gear is mounted on both the feeding shaft (13) and the rotating feed cylinder (11). The two fourth bevel gears are connected to the third bevel gear. The two fourth bevel gears are symmetrically arranged about the horizontal plane of the axis of the second round shaft (45).

6. A grain pump truck according to claim 1, characterized in that, The negative pressure cylinder (10) has a negative pressure suction chamber (46) inside. The dust suction hole (14) is connected to the negative pressure suction chamber (46). The axis of the dust suction hole (14) is perpendicular to the axis of the rotating feed cylinder (11). The dust suction end of the dust pump (4) is connected to a pipe. The other end of the pipe is connected to the negative pressure suction chamber (46).

7. A grain pump truck according to claim 1, characterized in that, The bottom of the conveying cylinder (20) is rotatably connected to a gear shaft (52), and the output shaft end of the motor (3) is connected to a third toothed belt. The third toothed belt is connected to the gear shaft (52). A fifth bevel gear is installed on both the gear shaft (52) and the conveying shaft (22), and the two fifth bevel gears mesh orthogonally.

8. A grain pump truck according to claim 1, characterized in that, The air outlet of the air inlet fan (6) is connected to the air guide pipe (47), and the air outlet of the air guide pipe (47) is connected to the air distribution duct (48). The end face of the air distribution duct (48) facing the high-pressure air chamber (28) is evenly distributed with flow equalization mesh holes (19), and the air distribution duct (48) is connected to the high-pressure air chamber (28) through this end face.

9. A grain pump truck according to claim 2, characterized in that, The circulating return air device includes an exhaust fan (49) installed on a bracket (34) and a pump outlet pipe (31) installed on a telescopic arm (5). The exhaust port of the exhaust fan (49) is connected to the high-pressure air chamber (28) through a one-way exhaust pipe. A corrugated through pipe (50) is installed at the axial position of the corrugated conveying pipe (29). One end of the corrugated through pipe (50) is sealed and connected to the air inlet of the exhaust fan (49) through a clamp, and the other end is connected to a return air pipe (32) through a clamp. The return air pipe (32) is connected to the pump outlet pipe (31), and gas-solid separation screen holes (33) are evenly distributed at the connection between the two.

10. A grain pump truck according to claim 9, characterized in that, The pump outlet pipe (31) is provided with a discharge elbow (51) at its end. The angle between the axis of the discharge elbow (51) and the axis of the pump outlet pipe (31) is 45°. The axis of the gas-solid separation screen (33) is parallel to the axis of the pump outlet pipe (31).

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