Intelligent grading negative pressure conveying device for pecan raw materials

Abstract

The invention relates to the technical field of agricultural product conveying, in particular to an intelligent grading negative pressure conveying device for pecan raw materials. The raw material grading device comprises a raw material grading mechanism, the raw material grading mechanism comprises a material guiding and screening assembly and a flexible guiding assembly, the material guiding and screening assembly comprises a vertical material guiding channel and a grading screen, the vertical material guiding channel comprises a material screening channel, the grading screen is arranged on the inner side of the material screening channel, and the flexible guiding assembly is arranged on the inner side of the material screening channel. The air pressure generator and the uniformly distributed array guide-in air pipes penetrate through the bottom wall and the side wall of the horizontal channel and guide in air flow, so that an air wall effect is formed at the bottom end and the two sides of the inner side of the horizontal channel, when pecans are transported through the horizontal channel, the pecans do not make contact with the inner wall of the horizontal channel under the action of the air wall, and the conveying efficiency is improved. Meanwhile, the carya cathayensis can be prevented from bumping against the inner wall of the channel, the negative pressure transportation speed is increased, the carya cathayensis is protected, and bumping is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural product transportation, and in particular to an intelligent grading negative pressure transportation device for pecan raw materials. Background Art

[0002] Negative pressure conveying is to suck materials into conveying structures such as pipelines and transport them to the destination under the action of a vacuum pump. Negative pressure conveying is suitable for short-distance conveying tasks with high precision requirements, so it is widely used in fields such as the food industry and the pharmaceutical industry that have high requirements for material safety and conveying accuracy.

[0003] Negative pressure conveying can also be used in the transportation of pecans. It mainly uses a negative pressure generator to suck the pecans into one side of the conveying pipe and suck them out from the other side.

[0004] At present, there are still some shortcomings in the negative pressure transportation of pecans: 1. During the negative pressure transportation in the pipeline, pecans will often collide with the pipeline, and the collision can easily cause the shell and kernel to break, affecting the transportation of pecans in the pipeline; 2. When facing the transportation of a large amount of pecan raw materials, due to the influence of vacuum degree and the shape and quality of pecans themselves, the transportation surface of the negative pressure transportation pipeline should not be too large, and most pecans are of different sizes. When passing through the transportation pipeline, pecans of different sizes are subject to different suction forces, and there will be a large speed difference between pecans, which will cause blockage in the pipeline and further reduce the transportation efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent grading negative pressure conveying device for pecan raw materials to solve the problem that during the transportation of pecans, collisions may occur, resulting in the shells and kernels being broken and mixed in the pecans, thereby affecting the negative pressure conveying; when the capacity of the conveying pipeline is not too large, when the pecan raw materials pass through the conveying pipeline, pecans of different sizes are subjected to different suction forces, resulting in a large speed difference and causing blockage in the pipeline, thereby reducing the conveying efficiency, and the like.

[0006] In order to achieve the above-mentioned object, the present invention provides a pecan raw material intelligent grading negative pressure conveying device, comprising a raw material grading mechanism, the raw material grading mechanism comprising a material guiding and screening component and a flexible guiding component, the material guiding and screening component comprising a vertical material guiding channel and a grading screen, the vertical material guiding channel comprising a screening channel, the grading screen is arranged on the inner side of the screening channel, the flexible guiding component is arranged on the inner side of the screening channel, and is attached to the top of the grading screen to form a flexible guiding effect to prevent collision;

[0007] A negative pressure generating component and a conveying mechanism, wherein the negative pressure generating component is arranged on one side of the screening material channel, and the conveying mechanism is arranged between the negative pressure generating component and the screening material channel;

[0008] The conveying mechanism includes a triple conveying component, an anti-collision gas input component and an intelligent counting component. The triple conveying component is arranged between the negative pressure generating component and the screening channel, the anti-collision gas input component is arranged on the outside of the triple conveying component, the anti-collision gas input component includes an array introduction air pipe, the array introduction air pipe passes through the pipeline wall of the triple conveying component and uniformly inputs array gas on the inner side of the pipeline, and the array gas forms a uniform air wall in the pipeline of the triple conveying component to reduce friction and prevent collision. The intelligent counting component is arranged on the triple conveying component.

[0009] As a further improvement of the present technical solution, the grading screens are arranged in parallel in a group of three on the inner side of the screening channel, and the grading screens are arranged obliquely, and the diameters of the screen holes of the three grading screens decrease from top to bottom. The side wall of the screening channel is provided with three export windows corresponding to the three grading screens, and one end of the triple conveying assembly is arranged in contact with the export window.

[0010] As a further improvement of the technical solution, the triple conveying assembly includes conveying channels, three of which are arranged in parallel as a group, and the three conveying channels correspond to the outsides of the three outlet windows of the side wall of the screening channel;

[0011] Among them, the conveying channel includes a horizontal channel and a concentrating channel. The horizontal channel is horizontally arranged on one side of the negative pressure generating component, and the concentrating channel is obliquely arranged on one side of the horizontal channel, and the other side of the concentrating channel is attached to the export window of the side wall of the screening channel. The channel cross-sections of the three horizontal channels decrease from top to bottom, and the channel cross-sections of the three horizontal channels correspond to the diameters of the sieve holes of the three graded screens.

[0012] As a further improvement of the technical solution, the concentrated channel is a triangular channel that is wide at the top and narrow at the bottom, and the horizontal channel is connected to the narrow channel opening at the bottom of the concentrated channel;

[0013] A chip drop groove for facilitating the falling of chips is provided on the bottom wall of the centralizing channel, and a collecting bottom box for collecting chips is also provided below the centralizing channel.

[0014] As a further improvement of the technical solution, the anti-collision gas input assembly is arranged outside the horizontal channel, and the anti-collision gas input assembly also includes an air pressure generator, which is arranged around the outside of the horizontal channel, and the array air introduction pipes are respectively arranged on the two side walls and the bottom wall of the horizontal channel, and the array air introduction pipes are connected to the air pressure generator;

[0015] Wherein, the array of inlet air tubes includes a plurality of micro air tubes, and the micro air tubes are evenly distributed on both side walls and the bottom wall of the horizontal channel.

[0016] As a further improvement of the present technical solution, the intelligent counting component includes a data collection body and a scanning sensor. The data collection body is arranged above the connection between the horizontal channel and the concentrated channel, the scanning sensor is arranged on the inner side of the connection between the horizontal channel and the concentrated channel, and the scanning sensor is connected to the data collection body.

[0017] As a further improvement of the present technical solution, the flexible guide assembly includes guide ramps and buffer bristles. The guide ramps are arranged in parallel on the inner side of the screening channel in a group of three, and the guide ramps are distributed above three grading screens. The buffer bristles are arranged in a group of multiples and are evenly distributed above the guide ramps.

[0018] As a further improvement of the present technical solution, the guide inclined plate is inclined in the opposite direction to the grading screen, and the bottom end of the guide inclined plate is close to the top end of the grading screen. The three grading screens are provided with a pad for preventing collision on one side close to the bottom end of the guide inclined plate.

[0019] As a further improvement of the technical solution, the vertical material guide channel also includes a vibration motor and an anti-displacement pad. The vibration motor is arranged outside the side wall of the screening channel, and the anti-displacement pad is arranged at the four corners of the bottom end of the screening channel.

[0020] As a further improvement of the present technical solution, the negative pressure generating assembly includes a sealed box, a negative pressure generator and a pecan collection box, the sealed box is a box with one side that can be opened, one end of the horizontal channel passes through the side wall of the sealed box, the negative pressure generator is arranged in the sealed box, and the output end of the negative pressure generator is connected to the horizontal channel, the pecan collection boxes are arranged in a group of three inside the sealed box, and the three pecan collection boxes are respectively arranged below the connection between the three horizontal channels and the side wall of the sealed box.

[0021] Compared with the prior art, the present invention provides a pecan raw material intelligent grading negative pressure conveying device, which has the following beneficial effects:

[0022] The present invention uses an air pressure generator and an evenly distributed array to introduce air pipes, which pass through the bottom wall and side walls of the horizontal channel and introduce air flow, thereby forming an air wall effect at the bottom end and both sides of the inner side of the horizontal channel. When pecans are transported through the horizontal channel, the pecans will not contact the inner wall of the horizontal channel under the action of the air wall, thereby reducing friction resistance and preventing the pecans from knocking against the inner wall of the channel, thereby accelerating the negative pressure transportation rate and protecting the pecans from knocking.

[0023] In addition, after the pecan raw materials enter from the top of the screening channel, they will roll down in a cycle under the buffering and guidance of the guide ramp and buffer brushes, and complete screening through three graded screens with successively decreasing sieve hole diameters. Eventually, pecans of different diameter ranges will be able to fall into different concentrated channels and finally enter the horizontal channel of the corresponding channel cross-sectional size, so that pecans of the same diameter range are subjected to similar suction, thereby keeping their conveying speeds similar, preventing pecans from being blocked in the pipeline, and forming smooth graded negative pressure transportation.

[0024] In addition, guide ramps and buffer brushes are used to guide the pecans to tumble in a cycle, and screening is completed through three graded screens with successively decreasing sieve hole diameters, which ensures that pecans of different diameter ranges are accurately classified. When the pecans are graded according to size and enter the corresponding horizontal channels, pecans within the same diameter range will be subject to similar suction forces, ensuring that their conveying speed in the pipeline is consistent. This is extremely beneficial for walnut counters, because materials with high consistency are easier to be accurately counted, reducing counting errors caused by size differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structural distribution of the interior of the screening channel and the conveying channel in the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the anti-collision gas input component and the centralized channel in the present invention;

[0028] Figure 4 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0029] Figure 5 It is a top view of the overall structure of the present invention;

[0030] Figure 6 for Figure 5 The overall structural cross-sectional view in the AA direction;

[0031] Figure 7 for Figure 6 A magnified view of the structure at C in the middle;

[0032] Figure 8 for Figure 5 Cross-sectional view of the overall structure along the BB direction.

[0033] In the figure: 1. material guiding and screening assembly; 11. vertical material guiding channel; 111. screening channel; 112. vibration motor; 113. anti-displacement base pad; 12. grading screen; 2. flexible guiding assembly; 21. guide ramp; 22. buffer bristles; 3. negative pressure generating assembly; 301. sealed box; 302. negative pressure generator; 303. pecan collection box; 4. triple conveying assembly; 41. conveying channel; 411. horizontal channel; 412. centralized channel; 5. anti-collision gas input assembly; 51. air pressure generator; 52. array inlet air pipe; 6. intelligent counting assembly; 61. data collection body; 62. scanning sensor. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Reference Figure 1-8 , a pecan raw material intelligent grading negative pressure conveying device, in order to reduce the collision of pecans in the transportation channel during negative pressure transportation and improve the transportation rate, it is provided with a raw material grading mechanism, a negative pressure generating component 3 and a conveying mechanism, the raw material grading mechanism includes a material guiding and screening component 1 and a flexible guiding component 2, the material guiding and screening component 1 includes a vertical material guiding channel 11 and a grading screen 12, the vertical material guiding channel 11 includes a screening channel 111, the grading screen 12 is arranged on the inner side of the screening channel 111, the flexible guiding component 2 is arranged on the inner side of the screening channel 111, and fits above the grading screen 12 to form a flexible guiding effect to prevent collision;

[0036] A negative pressure generating component 3 and a conveying mechanism, wherein the negative pressure generating component 3 is arranged on one side of the sieving channel 111, and the conveying mechanism is arranged between the negative pressure generating component 3 and the sieving channel 111;

[0037] The conveying mechanism includes a triple conveying component 4, an anti-collision gas input component 5 and an intelligent counting component 6. The triple conveying component 4 is arranged between the negative pressure generating component 3 and the screening channel 111. The anti-collision gas input component 5 is arranged on the outside of the triple conveying component 4. The anti-collision gas input component 5 includes an array inlet air pipe 52. The array inlet air pipe 52 passes through the pipeline wall of the triple conveying component 4 and uniformly inputs the array gas on the inner side of the pipeline. The array gas forms a uniform air wall in the pipeline of the triple conveying component 4 to reduce friction and prevent collision. The intelligent counting component 6 is arranged on the triple conveying component 4.

[0038] Three grading screens 12 are arranged in parallel on the inner side of the screening channel 111 as a group, and the grading screens 12 are arranged obliquely, and the diameters of the screen holes of the three grading screens 12 decrease from top to bottom. The side wall of the screening channel 111 is provided with three export windows corresponding to the three grading screens 12, and one end of the triple conveying component 4 is respectively arranged in contact with the export windows, so that when pecans fall onto the grading screens 12, pecans of different diameter ranges can be screened out in sequence from large to small. The pecan raw materials after screening by the three grading screens 12 will eventually enter the triple conveying component 4 through different export windows, respectively, to form graded transportation.

[0039] The triple conveying assembly 4 includes conveying channels 41, and three conveying channels 41 are arranged in parallel as a group, and the three conveying channels 41 correspond to the outsides of the three outlet windows of the side wall of the screening channel 111;

[0040] Among them, the conveying channel 41 includes a horizontal channel 411 and a concentrated channel 412. The horizontal channel 411 is horizontally arranged on one side of the negative pressure generating component 3, and the concentrated channel 412 is obliquely arranged on one side of the horizontal channel 411, and the other side of the concentrated channel 412 is close to the export window of the side wall of the screening channel 111. The channel cross-sections of the three horizontal channels 411 from top to bottom decrease successively, and the channel cross-sections of the three horizontal channels 411 correspond to the sieve hole diameters of the three grading screens 12, so that the three grading screens 12 can screen out pecans with different diameter ranges and export them through the three export windows respectively, so that pecans with different diameter ranges can finally enter the horizontal channel 411 with the corresponding channel cross-section size, so that pecans with different diameter ranges can be subjected to the negative pressure suction of the corresponding cross-section range in the horizontal channel 411, and the pecans with the same diameter range are subjected to similar suction, so that their conveying speeds can be kept similar, preventing the pecans from being blocked in the pipeline.

[0041] The centralized channel 412 is a triangular channel that is wide at the top and narrow at the bottom, and the horizontal channel 411 is connected to the narrow channel opening at the bottom of the centralized channel 412. When the pecans exported from the export window enter the centralized channel 412, they will move downward in the inclined centralized channel 412 and be concentrated in the narrow channel opening at the bottom of the centralized channel 412 and enter the horizontal channel 411.

[0042] Among them, Figure 3 and Figure 7 As shown, a chip drop groove is provided on the bottom wall of the central channel 412 for facilitating the falling of debris, and a collecting bottom box for collecting debris is also provided below the central channel 412. When the pecans move down along the central channel 412, the debris mixed in the pecans will fall through the chip drop groove and enter the collecting bottom box for collection.

[0043] The anti-collision gas input assembly 5 is arranged outside the horizontal channel 411, and the anti-collision gas input assembly 5 also includes a gas pressure generator 51, which is arranged around the outside of the horizontal channel 411, and the array gas introduction pipes 52 are respectively arranged on the two side walls and the bottom wall of the horizontal channel 411, and the array gas introduction pipes 52 are connected to the gas pressure generator 51;

[0044] Among them, the array inlet air pipe 52 includes a plurality of micro air pipes, and the micro air pipes are evenly distributed on the two side walls and the bottom wall of the horizontal channel 411. The air pressure generator 51 is a device that can generate and eject airflow, which will not be described here. The air pressure generator 51 can introduce airflow to the bottom wall and side wall of the horizontal channel 411 through the array inlet air pipe 52, and form an air wall effect at the bottom wall and side wall of the horizontal channel 411 through a plurality of evenly distributed array inlet air pipes 52. At this time, when pecans enter the horizontal channel 411, the air walls on both sides and the bottom will prevent the pecans from contacting the horizontal channel 411, thereby reducing the friction resistance of the pecans, speeding up the transportation speed of the pecans, and preventing the pecans from knocking against the inner wall of the channel during transportation.

[0045] The intelligent counting component 6 includes a data collection body 61 and a scanning sensor 62. The data collection body 61 is arranged above the connection between the horizontal channel 411 and the concentrated channel 412. The scanning sensor 62 is arranged on the inner side of the connection between the horizontal channel 411 and the concentrated channel 412, and the scanning sensor 62 is connected to the data collection body 61. When pecans pass through the concentrated channel 412 and enter the horizontal channel 411, the passing pecans will be counted under the scanning of the scanning sensor 62.

[0046] The flexible guide assembly 2 includes a guide ramp 21 and buffer bristles 22. The guide ramps 21 are arranged in parallel on the inner side of the screening channel 111 in a group of three, and the guide ramps 21 are distributed above the three grading screens 12. The buffer bristles 22 are arranged in a group and evenly distributed above the guide ramps 21, so that when the pecans fall above the guide ramps 21, they can be buffered under the action of the buffer bristles 22, preventing the pecans from hard contact with the guide ramps 21 and preventing bumps.

[0047] The guide inclined plate 21 is inclined in the opposite direction to the grading screen 12, and the bottom end of the guide inclined plate 21 is close to the top end of the grading screen 12. The three grading screens 12 are provided with a pad for preventing collision on one side close to the bottom end of the guide inclined plate 21, so that the pecans falling from the top guide inclined plate 21 will be buffered by the pad and fall onto the grading screen 12. Figure 6 As shown, the pecans will be screened through three grading screens 12 in sequence, and the pecans falling after screening will be buffered by the guide inclined plate 21 and the buffering bristles 22 to prevent the pecans from being bumped and broken.

[0048] The vertical material guide channel 11 also includes a vibration motor 112 and an anti-displacement base pad 113. The vibration motor 112 is arranged outside the side wall of the screening channel 111, and the anti-displacement base pad 113 is arranged at the four corners of the bottom end of the screening channel 111. The vibration force provided by the vibration motor 112 allows the three grading screens 12 inside the screening channel 111 to better complete the screening of pecans of different diameters.

[0049] The negative pressure generating assembly 3 includes a sealed box 301, a negative pressure generator 302 and a pecan collecting box 303. The sealed box 301 is a box with one side that can be opened. One end of the horizontal channel 411 passes through the side wall of the sealed box 301. The negative pressure generator 302 is arranged in the sealed box 301, and the output end of the negative pressure generator 302 is connected to the three horizontal channels 411. The pecan collecting boxes 303 are arranged in a group of three on the inner side of the sealed box 301, and the three pecan collecting boxes 303 are respectively arranged below the connection between the three horizontal channels 411 and the side wall of the sealed box 301, so that the pecans transported through the horizontal channel 411 will fall into the pecan collecting box 303 after entering the inner side of the sealed box 301.

[0050] Working principle: Start the negative pressure generator 302 to generate negative pressure suction in the horizontal channel 411 and the concentrated channel 412, start the vibration motor 112 to drive the screening channel 111 to vibrate, at this time, the hickory raw material is put into the top of the screening channel 111, and the hickory falls on the guide inclined plate 21, and moves downward under the buffering of the buffering bristles 22, and the hickory falls into the pad and rolls over the upper grading screen 12 to complete the screening, and after three screenings are completed through the three grading screens 12, the hickory of different diameter ranges can be respectively fallen into different concentrated channels 412, and under the influence of negative pressure suction, the hickory moves downward in the concentrated channel 412 and enters the horizontal channel 411, and at this time, the air pressure generator 51 is started, and the air pipe 52 is introduced into the horizontal channel 4 through the evenly distributed array. 11 The bottom wall and the side wall introduce air flow, thereby forming an air wall effect at the bottom wall and the side wall inside the horizontal channel 411. When pecans pass through the interior of the horizontal channel 411, they will not touch the inner wall of the horizontal channel 411 due to the action of the air wall, thereby reducing friction resistance. At the same time, it can also prevent the pecans from knocking against the inner wall of the channel, further accelerating the negative pressure transportation rate and protecting the pecans from knocking. The pecans transported through the horizontal channel 411 eventually enter the inside of the sealed box 301 and fall into the pecan collection box 303, completing the graded negative pressure transportation of the entire pecan. At the same time, during the transportation process, the scanning sensor 62 at the connection between the horizontal channel 411 and the concentrated channel 412 can scan and obtain the number of pecans, and count them through the data collection body 61.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent grading negative pressure conveying device for pecan raw materials, characterized in that: include: A raw material grading mechanism, the raw material grading mechanism comprising a material guiding and screening component (1) and a flexible guiding component (2), the material guiding and screening component (1) comprising a vertical material guiding channel (11) and a grading screen (12), the vertical material guiding channel (11) comprising a screening channel (111), the grading screen (12) being arranged on the inner side of the screening channel (111), the flexible guiding component (2) being arranged on the inner side of the screening channel (111) and being fitted above the grading screen (12) to form a flexible guiding function to prevent collision; A negative pressure generating component (3) and a conveying mechanism, wherein the negative pressure generating component (3) is arranged on one side of the sieving channel (111), and the conveying mechanism is arranged between the negative pressure generating component (3) and the sieving channel (111); The conveying mechanism comprises a triple conveying component (4), an anti-collision gas input component (5) and an intelligent counting component (6); the triple conveying component (4) is arranged between the negative pressure generating component (3) and the screening channel (111); the anti-collision gas input component (5) is arranged outside the triple conveying component (4); the anti-collision gas input component (5) comprises an array air inlet pipe (52); the array air inlet pipe (52) passes through the pipe wall of the triple conveying component (4) and uniformly inputs array gas on the inner side of the pipe, and the array gas forms a uniform air wall in the pipe of the triple conveying component (4); and the intelligent counting component (6) is arranged on the triple conveying component (4).

2. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 1 is characterized in that: The grading screens (12) are arranged in parallel in a group of three on the inner side of the screening channel (111), and the grading screens (12) are arranged obliquely, and the diameters of the screen holes of the three grading screens (12) decrease from top to bottom. The side wall of the screening channel (111) is provided with three outlet windows corresponding to the three grading screens (12), and one end of the triple conveying assembly (4) is respectively arranged in contact with the outlet windows.

3. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 2 is characterized in that: The triple conveying assembly (4) comprises conveying channels (41), wherein three conveying channels (41) are arranged in parallel as a group, and the three conveying channels (41) correspond to the outer sides of three outlet windows on the side wall of the screening channel (111); The conveying channel (41) comprises a horizontal channel (411) and a concentrating channel (412); the horizontal channel (411) is arranged horizontally on one side of the negative pressure generating component (3); the concentrating channel (412) is arranged obliquely on one side of the horizontal channel (411); and the other side of the concentrating channel (412) is in contact with the outlet window of the side wall of the screening channel (111); the channel cross-sections of the three horizontal channels (411) decrease from top to bottom, and the channel cross-sections of the three horizontal channels (411) correspond to the diameters of the sieve holes of the three graded screens (12).

4. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 3 is characterized in that: The centralizing channel (412) is a triangular channel that is wide at the top and narrow at the bottom, and the horizontal channel (411) is connected to the narrow channel opening at the bottom end of the centralizing channel (412); A chip drop groove for facilitating the falling of chips is provided on the bottom wall of the centralizing channel (412), and a collecting bottom box for collecting chips is also provided below the centralizing channel (412).

5. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 4 is characterized in that: The anti-collision gas input assembly (5) is arranged outside the horizontal channel (411), and the anti-collision gas input assembly (5) also includes an air pressure generator (51), and the air pressure generator (51) is arranged around the outside of the horizontal channel (411), and the array air introduction pipe (52) is respectively arranged on the two side walls and the bottom wall of the horizontal channel (411), and the array air introduction pipe (52) is connected to the air pressure generator (51); The array of airway introduction tubes (52) includes a plurality of micro airways, and the micro airways are evenly distributed on both side walls and the bottom wall of the horizontal channel (411).

6. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 1 is characterized in that: The intelligent counting component (6) comprises a data collection body (61) and a scanning sensor (62). The data collection body (61) is arranged above the connection between the horizontal channel (411) and the focusing channel (412). The scanning sensor (62) is arranged inside the connection between the horizontal channel (411) and the focusing channel (412), and the scanning sensor (62) is connected to the data collection body (61).

7. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 1 is characterized in that: The flexible guide assembly (2) comprises guide inclined plates (21) and buffer bristles (22); the guide inclined plates (21) are arranged in parallel on the inner side of the screening channel (111) in a group of three, and the guide inclined plates (21) are distributed above the three grading screens (12); and the buffer bristles (22) are arranged in a group of multiple and are evenly distributed above the guide inclined plates (21).

8. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 7 is characterized in that: The guide inclined plate (21) is inclined in the opposite direction to the grading screen (12), and the bottom end of the guide inclined plate (21) is close to the top end of the grading screen (12). Pads for preventing collision are provided on one side of the three grading screens (12) close to the bottom end of the guide inclined plate (21).

9. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 1 is characterized in that: The vertical material guide channel (11) further comprises a vibration motor (112) and an anti-displacement base pad (113); the vibration motor (112) is arranged outside the side wall of the screening channel (111); and the anti-displacement base pad (113) is arranged at the four corners of the bottom end of the screening channel (111).

10. The intelligent grading negative pressure conveying device for pecan raw materials according to claim 3 is characterized in that: The negative pressure generating assembly (3) comprises a sealed box (301), a negative pressure generator (302) and a hickory collecting box (303); the sealed box (301) is a box with one side that can be opened; one end of the horizontal channel (411) passes through the side wall of the sealed box (301); the negative pressure generator (302) is arranged in the sealed box (301), and the output end of the negative pressure generator (302) is connected to the horizontal channel (411); the hickory collecting boxes (303) are arranged in groups of three on the inner side of the sealed box (301), and the three hickory collecting boxes (303) are respectively arranged below the connection between the three horizontal channels (411) and the side wall of the sealed box (301).

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