Walnut kernel dispersion and delivery device and grading device

Abstract

The application relates to a walnut kernel grading device. The device comprises a conveying bin, first conveying blocks, second conveying blocks and a driving mechanism. The first conveying blocks and the second conveying blocks are alternately arranged and closely distributed in the conveying bin. The first conveying blocks are provided with first inclined chutes in the conveying direction, and the second conveying blocks are provided with second inclined chutes in the conveying direction. The driving mechanism is located below the conveying bin and is used for driving the first conveying blocks and the second conveying blocks to move up and down in the vertical direction. The first conveying blocks and the second conveying blocks are alternately moved up and down in the conveying bin, and the walnut kernels are conveyed forward. In the conveying process, part of the walnut kernels are blocked, and part of the walnut kernels can continue to slide forward, so that the spacing between adjacent walnut kernels is enlarged, the walnut kernels are dispersed, the effect of arranging the walnut kernels according to channels and dispersing the walnut kernels in the channels during feeding is effectively achieved, the demand of image acquisition during visual grading is met, the problem that the walnut kernels are broken during dispersing the walnut kernels is avoided, and the quality of the graded walnut kernels is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of walnut grading equipment, and particularly relates to a walnut kernel dispersing and conveying device and a grading device. BACKGROUND

[0002] Since walnuts of different grades have different values, different walnuts need to be separated according to walnut grading standards. In the past, due to the diversity and irregularity of the appearance of walnut kernels, it is extremely difficult to mechanically grade them, and walnut kernel grading is mainly manual, requiring a large amount of labor and high grading cost. In recent years, machine vision technology has developed rapidly in the field of fruit and vegetable grading, and mature target detection algorithms can provide more than 90% recognition accuracy and less than 0.1s recognition speed, so machine vision recognition is currently used to accurately grade walnut kernels.

[0003] When the visual recognition device recognizes the walnut kernels, the walnut kernels need to be fully dispersed, and at the same time, the execution of the actuator needs to be facilitated, and a specific arrangement is required. The current dispersing device disperses the walnut kernels by vibration, and the dispersion position has high randomness, and the position of the walnut kernels cannot be specifically arranged, and at the same time, the walnut kernels are easily broken during vibration, thereby reducing the quality of the walnut kernels. SUMMARY

[0004] To solve or partially solve the problems in the related art, the present application provides a walnut kernel dispersing and conveying device and a walnut kernel grading device, which effectively realize the effects of arranging the walnut kernels according to the channels and dispersing the walnut kernels in the channels during feeding, meet the image acquisition requirements during visual grading, and avoid the problem of breaking the walnut kernels during dispersing.

[0005] The first aspect of the present application provides a walnut kernel dispersing and conveying device, which comprises

[0006] a conveying bin,

[0007] a first conveying block and a second conveying block, the first conveying block and the second conveying block are alternately arranged and closely distributed in the conveying bin, a first chute inclined along a conveying direction is arranged on the first conveying block, and a second chute inclined along the conveying direction is arranged on the second conveying block;

[0008] a driving mechanism, which is located below the conveying bin and is used to drive the first conveying block and the second conveying block to move up and down in the vertical direction.

[0009] Optionally, in some schemes of the first aspect, the first conveying block and the second conveying block are alternately provided with at least two groups in the conveying direction.

[0010] Optionally, in some schemes of the first aspect, the first chute and the second chute are in the shape of a circular arc in cross section.

[0011] Optionally, in some schemes of the first aspect, the driving mechanism comprises

[0012] a driving shaft driven by the motor to rotate;

[0013] a first crank and a second crank fixedly installed at the two ends of the driving shaft respectively;

[0014] a first transmission member and a second transmission member slidingly installed above the driving shaft, the first transmission member being in bearing connection with one end of a first connecting rod, the other end of the first connecting rod being in bearing connection with the first crank, the second transmission member being in bearing connection with one end of a second connecting rod, the other end of the second connecting rod being in bearing connection with the second crank, the bearings all being joint bearings, so as to convert the rotary power of the driving shaft into the up-and-down reciprocating motion power of the first transmission member and the second transmission member for output;

[0015] wherein the bearing connection points of the first crank and the first connecting rod, and the bearing connection points of the second crank and the second connecting rod, are centrally symmetrically distributed about the midpoint of the driving shaft, so that the moving directions of the first transmission member and the second transmission member are opposite;

[0016] the first transmission member being fixedly connected with the first conveying block, and the second transmission member being fixedly connected with the second conveying block.

[0017] Optionally, in some schemes of the first aspect, the rotational speed ω of the driving shaft is determined according to the inclination α of the first chute, the length l1 of the crank, the height difference h between the lowest point of the first chute and the highest point of the second chute when the first conveying block and the second conveying block are respectively at the two extreme positions, and the diameter l of the walnut kernels.

[0018] Optionally, in some schemes of the first aspect, the rotational speed of the motor is ω,

[0019] wherein g is the acceleration of gravity.

[0020] The second aspect of the present application provides a walnut kernel grading device, comprising the above-mentioned walnut kernel dispersing and conveying device, further comprising

[0021] a conveying belt, one end of the conveying belt being in butt joint with the discharge end of the walnut kernel dispersing and conveying device;

[0022] a visual recognition module fixedly installed above the conveying belt;

[0023] A collecting device is fixedly installed at the discharge end of the conveying belt and used to guide different walnut kernels out of different outlets.

[0024] The visual recognition module and the collecting device are electrically connected with the controller respectively.

[0025] Optionally, in some schemes of the second aspect, the collecting device comprises

[0026] The chute is obliquely arranged, the bottom of the chute is provided with a plurality of discharging holes, and a movable guide is arranged in each discharging hole in a one-to-one manner, the movable guide is driven to move by an execution element, the execution element is electrically connected with the controller, and the bottom of the chute is provided with a discharge groove corresponding to each discharging hole.

[0027] Optionally, in some schemes of the second aspect, the chute is provided with at least two chutes arranged side by side, and the discharging holes in the chutes are arranged side by side.

[0028] Optionally, in some schemes of the second aspect, the guide has a connecting portion and an L-shaped bearing portion, the connecting portion is located at one end of the bearing portion, the connecting portion is embedded in the discharging hole, the top surface of the connecting portion has an inclination slightly smaller than the inclination of the chute, so that the upper edge of the connecting portion is lower than the bottom surface of the chute, and the lower edge of the connecting portion is higher than the bottom surface of the chute, and the bearing portion is located at the bottom surface of the connecting portion and located at the side of the lower side of the discharge groove.

[0029] The technical scheme provided in the application can have the following beneficial effects:

[0030] The first conveying block and the second conveying block are alternately arranged and distributed in the conveying bin, and the walnut kernels are conveyed forward by the alternating up-down movement of the first conveying block and the second conveying block, in the conveying process, part of the walnut kernels are blocked, and part of the walnut kernels can continue to slide forward, so that the spacing between adjacent walnut kernels is enlarged, the walnut kernels are effectively dispersed, the effect of arranging the walnut kernels according to the channels and dispersing the walnut kernels in the channels during feeding is achieved, the demand for image acquisition during visual grading is met, the problem that the walnut kernels are broken during dispersing is avoided, and the quality of the walnut kernels after grading is ensured.

[0031] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and other objects, features and advantages of the application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the several views, and in which the exemplary embodiments of the application are shown.

[0033] Figure 1 is a structural schematic diagram of a walnut kernel dispersion conveying device shown in an embodiment of the present application;

[0034] Figure 2 is an assembly schematic diagram of a first conveying block and a second conveying block shown in an embodiment of the present application;

[0035] Figure 3 is a structural schematic diagram of a driving mechanism shown in an embodiment of the present application;

[0036] Figure 4 is another structural schematic diagram of a driving mechanism shown in an embodiment of the present application;

[0037] Figure 5 is a schematic diagram of a movement direction of a conveying block shown in an embodiment of the present application;

[0038] Figure 6 is a structural schematic diagram of a walnut kernel grading device shown in an embodiment of the present application;

[0039] Figure 7 is a structural schematic diagram of a collecting device shown in an embodiment of the present application;

[0040] Figure 8 is another structural schematic diagram of a collecting device shown in an embodiment of the present application;

[0041] Figure 9 is an enlarged view of A of Figure 8

[0042] Figure 10 is a simulation schematic diagram of a walnut kernel dispersion conveying device shown in an embodiment of the present application;

[0043] Figure 11 is a force analysis schematic diagram of a walnut kernel on a conveying block shown in an embodiment of the present application;

[0044] Reference signs:

[0045] 1, conveying bin; 2, first conveying block; 21, first chute; 3, second conveying block; 31, second chute; 4, driving mechanism; 41, driving shaft; 42, motor; 43, first crank; 44, second crank; 45, first transmission member; 46, second transmission member; 47, first connecting rod; 48, second connecting rod; 5, conveying belt; 6, collecting device; 61, slide; 62, material falling hole; 63, guide member; 631, connecting portion; 632, bearing portion; 64, execution element; 65, discharging groove. DETAILED DESCRIPTION

[0046] ​The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0047] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0049] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0050] When a vibrating conveyor is used to disperse and transport walnut kernels, the scattered positions are highly random, and the positions of the walnut kernels cannot be specifically arranged. At the same time, the walnut kernels are easily broken during the vibration process, resulting in a decrease in the quality of the walnut kernels.

[0051] In response to the above problems, an embodiment of the present application provides a walnut kernel dispersion and conveying device that can effectively disperse the walnut kernels and at the same time achieve the effect of channel arrangement, meet the arrangement requirements during execution of the image acquisition and execution device, reduce the chance of walnut kernel breakage, and ensure the quality of the walnut kernels.

[0052] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0053] Embodiment one:

[0054] Please refer to Figures 1-2 The present application provides a walnut kernel dispersion conveying device, which comprises a conveying bin 1, a first conveying block 2, a second conveying block 3, and a driving mechanism 4. The conveying bin 1 is in the form of a box with an open top and is made of food-grade material. The first conveying block 2 and the second conveying block 3 are both in the form of a square and have the same size and shape.

[0055] The first conveying block 2 and the second conveying block 3 are alternately and closely arranged in the conveying bin 1. For example, Figure 2 As shown in the figure, the first, third, and fifth conveying blocks in the first row are the first conveying blocks 2, and the second, fourth, and sixth conveying blocks are the second conveying blocks 3. The conveying blocks in the second row are opposite to those in the first row, and the first, third, and fifth conveying blocks are the second conveying blocks 3, and the second, fourth, and sixth conveying blocks are the first conveying blocks 2. The conveying blocks in the third to tenth rows are arranged according to the above logic, and the first conveying blocks 2 and the second conveying blocks 3 are alternately and closely arranged in the conveying bin 1.

[0056] A first chute 21 is formed on the first conveying block 2 and inclined along the conveying direction, and a second chute 31 is formed on the second conveying block 3 and inclined along the conveying direction. The driving mechanism 4 is located below the conveying bin 1 and is used to drive the first conveying block 2 and the second conveying block 3 to move up and down alternately in the vertical direction. The maximum height of the upward movement of the first conveying block 2 or the second conveying block 3 is not greater than the minimum height of the conveying block. When the first conveying block 2 and the second conveying block 3 are at the upper and lower limit positions, respectively, the first conveying block 2 and the second conveying block 3 still have partial contact, which can effectively prevent the conveying blocks and the walnut kernels from falling out of the gap between the conveying blocks.

[0057] In operation, the walnut kernels are placed at the left end of the conveying bin 1. The driving mechanism 4 is actuated to drive the first conveying block 2 and the second conveying block 3 to move up and down alternately, thereby driving the walnut kernels to move in the conveying direction, and achieving the purpose of conveying the walnut kernels.

[0058] The conveying blocks in the conveying direction are columns, and the conveying blocks perpendicular to the conveying direction are rows. Taking a column of conveying blocks as an example, after the walnut kernels are placed in the conveying bin 1, the walnut kernels fall into the first chute 21 in the first row. The walnut kernels are severely overlapped, and the walnut kernels at the top automatically slide forward and move up and down with the sliding block, thereby dispersing the stacked walnut kernels.

[0059] The walnut kernel slides along the first chute 21 forwardly until it slides to the end of the first chute 21; if the height of the second conveying block 3 in the second row at this time is greater than the height of the end of the first chute 21, the walnut kernel is blocked; if the height of the second conveying block 3 in the second row at this time is less than the height of the end of the first chute 21, the walnut kernel continues to slide forwardly into the second chute 31 in the second row. By allowing part of the walnut kernels to be blocked and part of the walnut kernels to continue to slide forwardly, the spacing between adjacent walnut kernels is enlarged, and the walnut kernels are dispersed and conveyed forwardly.

[0060] Optionally, in some embodiments, the first conveying blocks 2 and the second conveying blocks 3 are alternately provided with at least two groups in the conveying direction, such as four groups, six groups, seven groups, etc.

[0061] Optionally, in some embodiments, the cross sections of the first chute 21 and the second chute 31 are in the shape of a circular arc, so that when the walnut kernel falls to any position in the chute, it will slide to the lowest point of the chute, thereby ensuring the specific position of the walnut kernel when it leaves the chute, facilitating the subsequent process.

[0062] Optionally, in some embodiments, the length of the cross section of the first chute 21 and the second chute 31 matches the width of the first conveying block and the width of the second conveying block, so that the width of the first conveying block and the top surface of the second conveying block are in the shape of two lines, thereby ensuring that the walnut kernel will fall into the chute.

[0063] Optionally, in some embodiments, the driving mechanism 4 includes a driving shaft 41, a first crank 43 and a second crank 44 fixedly installed at both ends of the driving shaft 41 respectively, and a first transmission member 45 and a second transmission member 46 slidingly installed above the driving shaft 41. Figure 3 and Figure 4 As shown in the drawings, the bottom of the first transmission member 45 and the bottom of the second transmission member 46 are respectively provided with a slide rod, and the slide rod is slidingly installed on the rack, and the first transmission member 45 and the second transmission member 46 are slidingly installed above the driving shaft 41 through the rack.

[0064] The driving shaft 41 is driven to rotate by the motor 42, wherein the motor 42 is fixedly installed on the rack, and the motor 42 is a stepping motor 42 or a servo motor 42 to facilitate adjustment of the rotating speed of the driving shaft 41, or a common motor 42 is used, and then a frequency converter is used to control the rotating speed of the motor 42. The first transmission member 45 is connected to one end of the first connecting rod 47 through a bearing, the other end of the first connecting rod 47 is connected to the first crank 43 through a bearing, the second transmission member 46 is connected to one end of the second connecting rod 48 through a bearing, and the other end of the second connecting rod 48 is connected to the second crank 44 through a bearing, wherein the bearings are all joint bearings, which can prevent locking during transmission. At the same time, the rotating power of the driving shaft 41 is converted into up-and-down reciprocating motion power of the first transmission member 45 and the second transmission member 46 for output.

[0065] The bearing connection points of the first crank 43 and the first connecting rod 47 and the bearing connection points of the second crank 44 and the second connecting rod 48 are centrally symmetrically distributed about the midpoint of the drive shaft 41, so that the moving directions of the first transmission member 45 and the second transmission member 46 are opposite. The first transmission member 45 is fixedly connected with the first conveying block 2, and the second transmission member 46 is fixedly connected with the second conveying block 3. The first transmission member 45 and the second transmission member 46 each comprise a plate and a plurality of rod members and a slide rod. The slide rod is located at the bottom surface of the plate and is used for sliding connection with the rack. The rod members are arranged on the top surface of the plate and correspond to the conveying blocks one by one. The lower ends of the rod members are fixedly connected with the plate, and the top ends of the rod members are fixedly connected with the conveying blocks.

[0066] When the drive shaft 41 rotates, the first transmission member 45 and the second transmission member 46 are driven to move up and down by the first connecting rod 47 and the second connecting rod 48. The first transmission member 45 and the second transmission member 46 further drive the first conveying block 2 and the second conveying block 3 to move up and down, thereby realizing the conveying and dispersion of the walnut kernels. Compared with the scheme of using two telescopic rods to respectively drive the first conveying block 2 and the second conveying block 3, the driving structure of the present application only needs one driving motor 42, which can simultaneously drive the first conveying block 2 and the second conveying block 3 to move up and down synchronously, thereby effectively reducing the manufacturing cost of the device. Meanwhile, the synchronization degree of the first conveying block 2 and the second conveying block 3 is higher in the present scheme, and no controller is needed for intermediate coordination, so the stability is higher. Furthermore, in the process of upward movement of the first conveying block 2 and the second conveying block 3, the speed gradually decreases, so that when the walnut kernels are lifted to the limit position, the linear speed is low, thereby effectively avoiding the technical problem that the walnut kernels are bounced off the conveying block, and the stability of the forward sliding of the walnut kernels is improved.

[0067] Optionally, in some embodiments, as shown in Figure 5 , Figure 10 and Figure 11 , the rotation speed ω of the drive shaft 41 is determined according to the inclination α of the first chute 21, the length l1 of the crank (43, 44), the height difference h between the lowest point of the first chute 21 and the highest point of the second chute 31 when the first conveying block 2 and the second conveying block 3 are respectively at the two limit positions, and the diameter l of the walnut kernels. By adjusting the rotation speed of the drive shaft 41, the sliding distance of the walnut kernels in the alternate time of upward and downward movement of the first transmission member 45 and the second transmission member 46 is equal to half of the overall length of the walnut kernels, thereby the number of walnut kernels sliding from the upper level to the lower level in the alternate time is exactly one, which effectively improves the dispersion efficiency of the walnut kernels and is conducive to reducing the arrangement length of the conveying block.

[0068] Optionally, in some schemes of the first aspect, as shown in Figure 11The force analysis shows that the acceleration of the walnut kernel sliding in the chute is a, then a = gsin a - m gcos a;

[0069] The center point of the walnut kernel is set as the center of gravity of the walnut kernel, and the center of gravity of the walnut kernel passes through the chute, that is, the walnut kernel passes through the chute, and the maximum diameter of the walnut kernel is l (determined by selecting the maximum diameter of 100 walnut kernels) ;

[0070] The time for the walnut kernel to slide from rest on the chute is t,

[0071] Then

[0072] During the operation of the device, the time when the first chute is higher than the second chute adjacent to it is t0,

[0073] Then Where h is the height between the lowest point of the first chute 21 and the highest point of the second chute 31 when the first conveying block 2 and the second conveying block 3 are respectively at the upper and lower two limit positions, l1 is the length of the crank (43 or 44), θ is the angle through which the crank (43 or 44) turns in t0 time, and ω is the rotational speed of the driving shaft 41.

[0074] When t0 = t0, only one walnut kernel can slide from the first chute to the adjacent second conveying block chute,

[0075] At this time Further, the rotational speed of the driving shaft is

[0076] Based on the above analysis, in order to make the walnut kernel slide smoothly through the first chute 32 and the second chute 31 in the alternating position and achieve the purpose of separating the continuous closely arranged walnut kernels, the rotational speed that meets the maximum diameter of the walnut kernel passing through the alternating position needs to be set. According to the measurement of 100 1 / 2 walnut kernels, the average diameter of 1 / 2 kernel is 30.19mm, and the maximum diameter is 34.36mm. Taking this walnut kernel as an example, the minimum distance that the walnut kernel needs to slide through to meet the smooth passing through the alternating position is 17.18mm. If the rotational speed of the driving shaft 41 that meets the smooth passing through the alternating position of the walnut kernel is ω, then the minimum diameter of the walnut kernel that can meet the dispersion effect at the rotational speed ω should be 17.18×2 / 3 equal to 11.45.

[0077] According to the measurement of 100 1 / 8 walnut kernels, the minimum diameter is 9.91, which is less than 11.45, so the rotational speed does not meet the condition of dispersing two 1 / 8 kernels with the smallest diameter. If the condition is to be met, the motor speed should be greater than ω.

[0078] To solve the above problems, the rotation speed ω1 of the driving shaft 41 is set to a rotation speed satisfying the condition that the maximum walnut kernel passes through the alternating position and can be dispersed, and the rotation speed ω2 of the driving shaft 41 is set to a rotation speed satisfying the condition that the minimum walnut kernel passes through the alternating position and can be dispersed.

[0079] The rotation speed ω of the driving shaft 41 is controlled to periodically change between ω1 and ω2 by frequency conversion, and the walnut kernel passes through the entire feeding bin at least twice.

[0080] Under this condition, the two minimum walnut kernels in continuous close contact can be separated and separated by one level position, and each time they can slide to the next level chute. The two maximum walnut kernels in continuous close contact can be separated and separated by one level position, and the action of being blocked or smoothly sliding to the next level chute in the subsequent movement is synchronous, so they will not overlap again.

[0081] Through the above analysis, it can be seen that the change of the motor speed can meet the effect that the two maximum or two minimum walnut kernels in continuous close contact can smoothly slide to the next level chute and be dispersed.

[0082] Embodiment two:

[0083] Please refer to Figure 6 The application also provides a walnut kernel grading device, which comprises the walnut kernel dispersion conveying device in embodiment one, further comprises a conveying belt 5, a visual recognition module, and a collecting device 6; the visual recognition module comprises a camera for photographing the walnut kernels on the conveying belt 5 and performing walnut kernel level analysis and recognition.

[0084] One end of the conveying belt 5 is connected to the discharge end of the walnut kernel dispersion conveying device; the visual recognition module is fixedly installed above the conveying belt 5; the collecting device 6 is fixedly installed at the discharge end of the conveying belt 5 and is used for guiding different walnut kernels out of different outlets; the visual recognition module and the collecting device 6 are electrically connected to the controller respectively.

[0085] In work, the walnut kernels fall into the conveying belt 5 after passing through the walnut kernel dispersion conveying device, and then the conveying belt 5 conveys the walnut kernels to the photographing position of the camera, the camera photographs and analyzes the walnut kernels to determine the level of the walnut kernels and transmits a signal to the controller. After the walnut kernels leave the conveying belt 5, they enter the collecting device 6 for collection, and the controller controls the collecting device 6 to perform corresponding actions according to the signal sent by the camera, so as to guide the walnut kernels out of different outlets and complete the grading work of the walnut kernels.

[0086] Optionally, in some specific embodiments, such as Figures 7-9As shown, the collecting device 6 comprises an inclined chute 61, the bottom of the chute 61 is provided with at least one discharging hole 62, and a corresponding guiding piece 63 is arranged in each discharging hole 62 and can move up and down, the guiding piece 63 is driven to move up and down by an executing element 64, and the executing element 64 is electrically connected with a controller; the bottom of the chute is provided with a discharging groove 65 corresponding to each discharging hole 62.

[0087] In operation, the controller determines from which discharging groove 65 the walnut kernels should be discharged according to the signals from the camera, and then controls the executing element 64 to act when the walnut kernels move to the corresponding position of the discharging groove 65, so as to drive the guiding piece 63 to move upward and open the discharging hole 62, thereby allowing the passing walnut kernels to be discharged into the corresponding discharging groove 65 through different discharging holes 62, and achieving the purpose of discharging different walnut kernels from different discharging grooves 65.

[0088] Optionally, in some embodiments, the chute 61 is provided with at least two parallel chutes 61, and the discharging holes 62 in the chutes 61 are arranged side by side, so that the walnut kernels can fall into different chutes 61 after leaving the belt conveyor, and then be separated in the transverse direction and fall into different chutes 61, effectively avoiding the problem of different varieties of walnut kernels being discharged from the same discharging groove 65, and effectively ensuring the grading effect of the walnut kernels.

[0089] Optionally, in some embodiments, the guiding piece 63 has a connecting portion 631 and an L-shaped bearing portion 632, the connecting portion 631 is located at one end of the bearing portion 632, the connecting portion 631 is embedded in the discharging hole 62,

[0090] The top surface of the connecting portion 631 has an inclination slightly smaller than that of the chute 61, so that the upper edge of the connecting portion 631 is lower than the bottom surface of the chute 61, and the lower edge of the connecting portion 631 is higher than the bottom surface of the chute 61, thereby forming two steps with high and low levels on the upper and lower sides of the connecting portion 631 and the chute 61, which is beneficial to the normality of the walnut kernels sliding through the chute 61. The bearing portion 632 is located at the bottom surface of the connecting portion 631 and is located laterally at the lower side of the discharging groove 65.

[0091] When the guiding piece 63 moves upward, the bearing portion 632 moves upward, thereby opening the discharging hole 62 and allowing the walnut kernels to fall into the corresponding chute 61 from the discharging hole 62. After the connecting portion 631 moves upward, a vertical blocking plate is formed at the lower side of the corresponding chute 61, which effectively avoids the problem that the walnut kernels cannot fall from the discharging hole 62 due to the excessive speed of the walnut kernels moving along the chute 61, and ensures the stability of the walnut kernel output.

[0092] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A walnut kernel dispensing conveyor, characterized by: Comprising a conveying bin, a first conveying block and a second conveying block, the first conveying block and the second conveying block are alternately arranged and closely distributed in the conveying bin, a first chute is arranged on the first conveying block and is inclined along the conveying direction, and a second chute is arranged on the second conveying block and is inclined along the conveying direction; a driving mechanism, which is located below the conveying bin and is used to drive the first conveying block and the second conveying block to move up and down in the vertical direction; the driving mechanism comprises a driving shaft, which is driven to rotate by a motor; a first crank and a second crank, which are respectively fixedly installed at both ends of the driving shaft; a first transmission member and a second transmission member, which are slidingly installed above the driving shaft, the first transmission member is bearing connected with one end of a first connecting rod, the other end of the first connecting rod is bearing connected with the first crank, the second transmission member is bearing connected with one end of a second connecting rod, and the other end of the second connecting rod is bearing connected with the second crank, the bearings are all joint bearings, so as to convert the rotating power of the driving shaft into the up-and-down reciprocating motion power of the first transmission member and the second transmission member for output; wherein the bearing connection points of the first crank and the first connecting rod and the bearing connection points of the second crank and the second connecting rod are centrally symmetrically distributed about the midpoint of the driving shaft, so that the moving directions of the first transmission member and the second transmission member are opposite; the first transmission member is fixedly connected with the first conveying block, and the second transmission member is fixedly connected with the second conveying block; the motor rotating speed ω of the driving shaft is determined according to the inclination α of the first chute, the length l1 of the crank, the height difference h between the lowest point of the first chute and the highest point of the second chute when the first conveying block and the second conveying block are respectively at the two extreme positions, and the diameter l of the walnut kernel; the motor rotating speed is ω, wherein g is the acceleration of gravity; ω1 is the motor rotating speed of the driving shaft, which satisfies the condition that the largest walnut kernel passes through the alternate position and can be dispersed, and ω2 is the motor rotating speed of the driving shaft, which satisfies the condition that the smallest walnut kernel passes through the alternate position and can be dispersed; the motor rotating speed ω of the driving shaft is periodically changed between ω1 and ω2 by frequency conversion speed regulation, and the walnut kernel is at least periodically changed twice when passing through the entire feeding bin.

2. The walnut kernel dispersing and conveying device according to claim 1, characterized in that: the first conveying block and the second conveying block are alternately provided with at least two groups in the conveying direction.

3. The walnut kernel dispersing and conveying device according to claim 1 or 2, characterized in that: the cross sections of the first chute and the second chute are in the shape of a circular arc.

4. A walnut kernel grading apparatus characterized by: The walnut kernel dispersing and conveying device according to any one of claims 1-3 further comprises a conveying belt, one end of the conveying belt is butted against the discharge end of the walnut kernel dispersing and conveying device; a visual recognition module, which is fixedly installed above the conveying belt; a collecting device, which is fixedly installed at the discharge end of the conveying belt and is used to guide different walnut kernels out from different outlets. The visual recognition module and the collecting device are electrically connected with the controller respectively.

5. The walnut kernel grading apparatus of claim 4, wherein: The collecting device comprises The chute is obliquely arranged, and a blanking hole is arranged at the bottom of the chute in a spaced manner. A guiding piece capable of moving up and down is arranged in the blanking hole in a one-to-one correspondence. The guiding piece is driven to move by an execution element, and the execution element is electrically connected with the controller. The bottom of the chute is provided with a discharge groove arranged in a one-to-one correspondence with the blanking hole.

6. The walnut kernel grading device according to claim 5, characterized in that: The chute is arranged in at least two parallel modes, and the blanking holes in the chute are arranged side by side.

7. The walnut kernel grading device according to claim 6, characterized in that: The guiding piece has a connecting part and an L-shaped bearing part. The connecting part is located at one end of the bearing part, is embedded in the blanking hole, and has a top surface with an inclination slightly smaller than that of the chute, so that the upper edge of the connecting part is lower than the bottom surface of the chute, and the lower edge of the connecting part is higher than the bottom surface of the chute. The bearing part is located at the bottom surface of the connecting part and at the side of the lower side of the discharge groove.

Images