Automatic sorting and screening device and method for deep processing of agricultural products

Abstract

The present invention belongs to the technical field of deep processing of agricultural products, and in particular to an automatic sorting and screening device and method for deep processing of agricultural products, comprising a base, a vibrating screen fixed on the surface of the base, and a feeder fixed above the end of the vibrating screen, wherein a screening assembly is installed above the base, and the device is provided with a speed regulating assembly, so that the transmission ratio between the driving shaft and the driven shaft can be adjusted, so that the feeding speed of the agricultural products and the screening rate of the agricultural products can always maintain an adaptive relationship, and the agricultural products can be avoided from being accumulated on the surface of the screening net, resulting in the clogging of the screening net, and preventing the sorting and screening efficiency of the agricultural products and the normal operation of the screening net from being affected, and the transmission ratio between the driving shaft and the driven shaft can be adjusted, without the need for manual repeated calibration and adjustment of the feeding amount of the agricultural products, the degree of automation is relatively high, and the adjustment accuracy is relatively high, which is relatively convenient and fast, saving manpower and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of deep processing of agricultural products, and in particular relates to an automatic sorting and screening device and method for deep processing of agricultural products. Background Art

[0002] In the same batch of agricultural products, the shape and size of the individual ones will directly affect their overall quality and price. Therefore, when the agricultural products are further processed, they will be graded according to their shape and size, so a sorting and screening device is needed;

[0003] Although the existing sorting and screening devices in life have met the needs of users to a certain extent, there are still certain defects in the use process. The specific problems are as follows: most of the traditional agricultural product sorting and screening devices sort the agricultural products through the screen. However, as the screening work proceeds, the agricultural products are easily accumulated and blocked in the holes of the screen. At this time, the unloading speed of the screen gradually cannot keep up with the feeding speed of the agricultural products, resulting in a large amount of agricultural products piling up on the surface of the screen, which not only affects the sorting and screening efficiency of the agricultural products, but also forms a vicious circle in severe cases, causing the screen to be completely blocked, affecting the normal operation of the screening work.

[0004] In order to solve the above problems, the present application proposes an automatic sorting and screening device and method for deep processing of agricultural products. Summary of the invention

[0005] The present invention provides an automatic sorting and screening device and method for deep processing of agricultural products, which can effectively solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an automatic sorting and screening device for deep processing of agricultural products, comprising a base, a vibrating screen fixed on the surface of the base, and a feeder fixed above the end of the vibrating screen;

[0007] A screening assembly is installed above the base, and the screening assembly includes a screening net, a spring, a pressure sensor, a support plate, a guide hopper, a feed hopper, a conveying cylinder, a conveying motor and a spiral auger;

[0008] The vibrating screen machine is internally slidably connected with a screening net, a spring is fixed at the four corners of the bottom of the screening net, a pressure sensor is fixed to the bottom end of the spring, a support plate is fixed between the pressure sensor and the vibrating screen machine, a discharge port is provided at the discharge end of the vibrating screen machine, a guide hopper is welded on the surface of the vibrating screen machine close to the discharge port, a feed hopper is provided at the bottom of the guide hopper, a conveying cylinder is fixed between the feed hopper and the base, a conveying motor is screwed to the surface of one end of the conveying cylinder, a spiral auger is rotatably connected to the inside of the conveying cylinder, and one end of the spiral auger is fixedly connected to the output end of the conveying motor.

[0009] As a preferred automatic sorting and screening device for deep processing of agricultural products of the present invention, a rack is welded on the surface of one end of the screening net close to the feeder, a gear is meshingly connected to the surface of the rack, a transmission shaft is fixed inside the gear, the transmission shaft is rotatably connected to the inside of the vibrating screen, and a clearance groove matched with the rack and the gear is opened inside the vibrating screen, and a lower hopper is fixed to the bottom of the end of the conveying cylinder away from the feed hopper.

[0010] As a preferred embodiment of an automatic sorting and screening device for deep processing of agricultural products of the present invention, a speed regulating assembly is installed between the transmission shaft and the feeder, and the speed regulating assembly includes a speed regulating support plate, an active shaft, an active cone wheel, a driving motor, a driven shaft, a driven cone wheel, a transmission belt, a bidirectional screw rod and a threaded block. A speed regulating support plate is welded on the surface of the feeder, and one side of the surface of the speed regulating support plate is rotatably connected to the active shaft, and the surface key of the active shaft is connected to two groups of symmetrically arranged active cone wheels, the surface screw of the speed regulating support plate is connected to the driving motor, and the other side of the surface of the speed regulating support plate is rotatably connected to the driven shaft, and the surface key of the driven shaft is connected to two groups of symmetrically arranged driven cone wheels, and the belts between the two groups of driven cone wheels and the two groups of active cone wheels are connected with a transmission belt, and the bottom of the speed regulating support plate is rotatably connected to the bidirectional screw rod, and both ends of the surface of the bidirectional screw rod are threadedly connected to threaded blocks.

[0011] As a preferred automatic sorting and screening device for deep processing of agricultural products of the present invention, a bevel gear group 1 is fixed to one end of the bidirectional screw rod close to the transmission shaft, a transmission rod is fixed to the other end of the bevel gear group 1, the transmission rod is rotatably connected to one side of the vibrating screen, and a bevel gear group 2 is connected between one end of the transmission rod away from the bevel gear group 1 and one end of the transmission shaft away from the gear.

[0012] As a preferred automatic sorting and screening device for deep processing of agricultural products of the present invention, a movable groove compatible with the threaded block is opened inside the speed regulating support plate, and both ends of the surfaces of the active shaft and the driven shaft are slidably connected with push sleeves, and two groups of the push sleeves are rotatably connected with the active bevel wheel and the driven bevel wheel respectively, the top of the threaded block is fixedly connected to one of the groups of push sleeves, a convex rod is fixed on the surface of the push sleeve, a shift rod is movably connected between the two groups of the convex rods, a hinge shaft is hinged at the middle part of the shift rod, and the hinge shaft is welded to the surface of the speed regulating support plate, and fixing frames are welded on the surfaces of the two groups of the push sleeves, and a tension spring is connected between the two fixing frames.

[0013] As a preferred embodiment of the automatic sorting and screening device for deep processing of agricultural products of the present invention, the output end of the driving motor is fixedly connected to one end of the driving shaft, and one end of the driven shaft is fixedly connected to the driving end of the feeder.

[0014] As a preferred automatic sorting and screening device for deep processing of agricultural products of the present invention, a dredging component is arranged below the screening net, and the dredging component includes a push plate, a second spring, an electromagnet, a guide slide rail, a dredging frame, an armature, a dredging top column and a third spring. A push groove is provided on one side of the vibrating screen, and a push plate is slidably connected in the push groove. A plurality of groups of springs 2 arranged equidistantly are fixed on one side of the surface of the push plate, and an electromagnet is fixed on the top of the second spring. Guide rails are symmetrically welded on both sides of the inner cavity of the vibrating screen, and a dredging frame is slidably connected between the two groups of guide slide rails. An armature is fixed to the bottom end of the dredging frame, and a plurality of groups of force storage grooves arranged equidistantly are provided inside the dredging frame, and a dredging top column is slidably connected in the force storage groove, and a third spring is fixed between the dredging top column and the dredging frame.

[0015] As a preferred embodiment of an automatic sorting and screening device for deep processing of agricultural products of the present invention, an electric telescopic rod is fixed on the surface of the vibrating screen close to the push plate, a connecting block is fixed between the output end of the electric telescopic rod and the bottom end of the push plate, and the distribution position of the dredging top column inside the dredging frame is adapted to the arrangement position of the filter holes inside the screening net.

[0016] As a preferred embodiment of the automatic sorting and screening device for deep processing of agricultural products of the present invention, a pressure sensor 2 is fixed to the surface end of the dredging frame, a spring 4 is fixed to the surface of the pressure sensor 2, and a contact plate is fixed to the top end of the spring 4.

[0017] The present invention also provides an automatic sorting and screening device and method for deep processing of agricultural products, comprising the following steps:

[0018] S1. Through the feeding of agricultural products, the amplitude and speed of the vibrating screen and the driving motor will be automatically adjusted, so that the agricultural products can maintain a stable vibrating screen feeding speed and a uniform feeding speed, so that the feeding speed of agricultural products and the screening rate of agricultural products always maintain an adaptive relationship, avoiding the accumulation of agricultural products on the surface of the screening net;

[0019] S2. When some of the filter holes of the screening net are clogged, the screening net is automatically pressed down inside the vibrating screen, which can change the transmission ratio between the driving shaft and the driven shaft, and realize automatic calibration and adjustment of the feeding amount of agricultural products, so that the feeding speed of conveying agricultural products and the speed of screening agricultural products return to a balanced adaptation relationship again;

[0020] S3. When the screening net is completely blocked, the screening net moves down to the surface of the guide rail. At this time, the drive motor will automatically shut down and keep the vibrating screen machine at the original screening rate. Then, the conveying motor will automatically start to remove the agricultural products accumulated on the surface of the screening net.

[0021] S4. When the screening net moves down to the surface of the guide rail, the electric telescopic rod and the electromagnet will automatically open, which will drive the push plate and the dredging frame to move back and forth inside the vibrating screen and the guide rail. The elastic force generated by squeezing the spring three during the movement can be used to push the dredging top column to clear the filter holes inside the screening net. After dredging, the feeder can be started again to continue the sorting and screening of agricultural products, which is fully automated.

[0022] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0023] 1. A screening assembly is provided. Through the use of a screening net, a spring, a pressure sensor, a support plate, a guide hopper, a feed hopper, a conveying cylinder, a conveying motor and a spiral auger, the agricultural products accumulated on the surface of the screening net can be removed to prevent the agricultural products from continuously accumulating on the screening net and affecting the subsequent dredging operation;

[0024] By using racks, gears and transmission shafts, the transmission ratio between the driving shaft and the driven shaft can be changed, and the feeding amount of agricultural products can be automatically calibrated and adjusted again, so that the feeding speed of agricultural products and the rate of screening agricultural products can return to an adaptive relationship again.

[0025] 2. A speed regulating assembly is provided. By using a speed regulating support plate, a driving shaft, a driving cone wheel, a driving motor, a driven shaft, a driven cone wheel, a transmission belt, a bidirectional screw and a threaded block, the transmission ratio between the driving shaft and the driven shaft can be adjusted to achieve the effect of adjusting the running speed of the driving feeder, so that the feeding speed of agricultural products and the screening speed of agricultural products can always maintain an adaptive relationship, avoiding the accumulation of agricultural products on the surface of the screening net, causing the screening net to be blocked, and preventing the sorting and screening efficiency of agricultural products and the normal operation of the screening net from being affected;

[0026] Through the use of a push sleeve, a convex rod, a lever, an articulated shaft, a fixed frame and a tension spring, the transmission ratio between the driving shaft and the driven shaft can be automatically adjusted. There is no need for manual repeated calibration to adjust the feeding amount of agricultural products. The automation degree is high and the adjustment accuracy is high. It is relatively convenient and quick, saving manpower and improving work efficiency.

[0027] 3. A dredging component is provided. Through the use of a push plate, a second spring, an electromagnet, a guide rail, a dredging frame, an armature, a dredging top column and a third spring, agricultural products can be pushed out of the filter hole, and this process is repeated until all agricultural products blocked inside the screening net are pushed out, and the screening net can be cleared and unblocked, so that the staff can clean the agricultural products blocked inside the screening net without disassembling the screening net, which brings great convenience to the staff, and the cleaning process is simple and easy to operate, which improves the efficiency and quality of clearing blockages, and further improves the efficiency of sorting and screening of agricultural products;

[0028] Through the use of pressure sensor 2, spring 4 and contact plate, the electric telescopic rod and electromagnet can be automatically controlled and turned on, thereby driving the dredging top column to clear and dredge the filter holes of the screening net, and the whole process is automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is an overall back view of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the screening net and the dredging component in the present invention;

[0033] Figure 4 A partial cross-sectional view of the screening assembly of the present invention;

[0034] Figure 5 It is a partial structural schematic diagram of the screening assembly in the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the transmission shaft and the speed regulating assembly in the present invention;

[0036] Figure 7 It is a structural schematic diagram of the speed regulating assembly in the present invention;

[0037] Figure 8 It is an overall bottom view of the present invention;

[0038] Fig. 9 It is a schematic diagram of the partial structure of the dredging component in the present invention;

[0039] Fig.10 It is a partial cross-sectional view of the push plate and the dredging frame in the present invention;

[0040] Fig.11 It is a cross-sectional view of the dredging frame in the present invention.

[0041] In the figure: 1, base; 2, vibrating screen; 3, screening assembly; 31, screening net; 311, rack; 312, gear; 313, transmission shaft; 32, spring 1; 33, pressure sensor 1; 34, support plate; 35, guide hopper; 351, discharge port; 36, feed hopper; 37, conveying cylinder; 371, lower hopper; 38, conveying motor; 39, spiral auger; 4, speed regulating assembly; 41, speed regulating support plate; 42, driving shaft; 43, driving cone wheel; 44, driving motor; 45, driven shaft; 46, driven cone wheel; 47, transmission belt; 48, two-way wire Rod; 481, bevel gear group one; 482, transmission rod; 483, bevel gear group two; 49, threaded block; 491, push sleeve; 492, convex rod; 493, lever; 494, hinge shaft; 495, fixed frame; 496, tension spring; 5, dredging assembly; 51, push plate; 52, electric telescopic rod; 521, connecting block; 53, spring two; 54, electromagnet; 55, guide rail; 56, dredging frame; 561, pressure sensor two; 562, spring four; 563, contact plate; 57, armature; 58, dredging top column; 59, spring three; 6, feeder. DETAILED DESCRIPTION

[0042] 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.

[0043] Example: Figure 1-Figure 11 As shown, the present invention provides a technical solution, an automatic sorting and screening device for deep processing of agricultural products, comprising a base 1, a vibrating screen 2 fixed on the surface of the base 1, and a feeder 6 fixed above the end of the vibrating screen 2;

[0044] A screening assembly 3 is installed above the base 1, and the screening assembly 3 includes a screening net 31, a rack 311, a gear 312, a transmission shaft 313, a spring 32, a pressure sensor 33, a support plate 34, a guide hopper 35, a discharge port 351, a feed hopper 36, a conveying cylinder 37, a lower hopper 371, a conveying motor 38 and a spiral auger 39;

[0045] A screening net 31 is slidably connected inside the vibrating screen 2, springs 32 are fixed at the four corners of the bottom of the screening net 31, a pressure sensor 33 is fixed at the bottom end of the spring 32, a support plate 34 is fixed between the pressure sensor 33 and the vibrating screen 2, a discharge port 351 is provided at the discharge end of the vibrating screen 2, a guide hopper 35 is welded on the side of the surface of the vibrating screen 2 close to the discharge port 351, a feed hopper 36 is provided at the bottom of the guide hopper 35, a conveying cylinder 37 is fixed between the feed hopper 36 and the base 1, and a conveying motor 38 is screwed to the surface of one end of the conveying cylinder 37. The inside of the conveying cylinder 37 is rotatably connected to a spiral auger 39, and one end of the spiral auger 39 is fixedly connected to the output end of the conveying motor 38. A rack 311 is welded to the surface of the end of the screening net 31 close to the feeder 6, and a gear 312 is meshed on the surface of the rack 311. A transmission shaft 313 is fixed inside the gear 312. The transmission shaft 313 is rotatably connected to the inside of the vibrating screen 2, and a clearance groove compatible with the rack 311 and the gear 312 is opened inside the vibrating screen 2. A lower hopper 371 is fixed to the bottom of the end of the conveying cylinder 37 away from the feed hopper 36.

[0046] A speed regulating assembly 4 is installed between the transmission shaft 313 and the feeder 6, and the speed regulating assembly 4 includes a speed regulating support plate 41, a driving shaft 42, a driving bevel wheel 43, a driving motor 44, a driven shaft 45, a driven bevel wheel 46, a transmission belt 47, a bidirectional screw 48, a bevel gear group 1 481, a transmission rod 482, a bevel gear group 2 483, a threaded block 49, a push sleeve 491, a protruding rod 492, a lever 493, a hinge shaft 494, a fixing bracket 495 and a tension spring 496;

[0047] A speed regulating support plate 41 is welded on the surface of the feeder 6, and a driving shaft 42 is rotatably connected to one side of the surface of the speed regulating support plate 41, and two groups of symmetrically arranged driving cone wheels 43 are connected to the surface of the driving shaft 42 by keys, and a driving motor 44 is connected to the surface of the speed regulating support plate 41 by screws, and a driven shaft 45 is rotatably connected to the other side of the surface of the speed regulating support plate 41, and two groups of symmetrically arranged driven cone wheels 46 are connected to the surface of the driven shaft 45 by keys, and a transmission belt 47 is connected between the two groups of driven cone wheels 46 and the two groups of driving cone wheels 43 by belts, and a bidirectional screw rod 48 is rotatably connected to the bottom of the speed regulating support plate 41, and thread blocks 49 are threadedly connected to both ends of the surface of the bidirectional screw rod 48, and a bevel gear group 481 is fixed to one end of the bidirectional screw rod 48 close to the transmission shaft 313, and a transmission rod 482 is fixed to the other end of the bevel gear group 481, and the transmission rod 482 is rotatably connected to one side of the vibrating screen 2, and the end of the transmission rod 482 away from the bevel gear group 481 is connected to the transmission shaft 31 The second bevel gear set 483 is connected between the ends away from the gear 312, a moving groove adapted to the threaded block 49 is provided inside the speed regulating support plate 41, both ends of the surfaces of the driving shaft 42 and the driven shaft 45 are slidably connected with push sleeves 491, and the two sets of push sleeves 491 are rotatably connected with the driving cone wheel 43 and the driven cone wheel 46 respectively, the top of the threaded block 49 is fixedly connected with one set of push sleeves 491, and a convex rod is fixed on the surface of the push sleeve 491 492, a lever 493 is movably connected between the two groups of protruding rods 492, a hinge shaft 494 is hinged in the middle of the lever 493, and the hinge shaft 494 is welded to the surface of the speed regulating support plate 41, and a fixing frame 495 is welded on the surface of the two groups of pushing sliding sleeves 491, and a tension spring 496 is connected between the two fixing frames 495, the output end of the driving motor 44 is fixedly connected to one end of the driving shaft 42, and one end of the driven shaft 45 is fixedly connected to the driving end of the feeder 6.

[0048] A dredging assembly 5 is provided below the screening net 31, and the dredging assembly 5 includes a push plate 51, an electric telescopic rod 52, a connecting block 521, a spring 2 53, an electromagnet 54, a guide rail 55, a dredging frame 56, a pressure sensor 2 561, a spring 4 562, a contact plate 563, an armature 57, a dredging top column 58 and a spring 3 59;

[0049] A push groove is provided on one side of the vibrating screen 2, and a push plate 51 is slidably connected in the push groove. A plurality of groups of springs 53 arranged at equal distances are fixed on one side of the surface of the push plate 51, and an electromagnet 54 is fixed on the top of the spring 53. Guide rails 55 are symmetrically welded on both sides of the inner cavity of the vibrating screen 2, and a dredging frame 56 is slidably connected between the two groups of guide rails 55. An armature 57 is fixed at the bottom end of the dredging frame 56. A plurality of groups of force storage grooves arranged at equal distances are provided inside the dredging frame 56, and a dredging top column 58 is slidably connected in the force storage groove, and the dredging top column 58 is slidably connected to the top column 58. A spring three 59 is fixed between 8 and the dredging frame 56, an electric telescopic rod 52 is fixed to the side of the surface of the vibrating screen machine 2 close to the push plate 51, a connecting block 521 is fixed between the output end of the electric telescopic rod 52 and the bottom end of the push plate 51, the distribution position of the dredging top column 58 inside the dredging frame 56 is adapted to the arrangement position of the filter holes inside the screening net 31, and a pressure sensor two 561 is fixed to the surface end of the dredging frame 56, a spring four 562 is fixed to the surface of the pressure sensor two 561, and a contact plate 563 is fixed to the top of the spring four 562.

[0050] The present invention also provides an automatic sorting and screening device and method for deep processing of agricultural products, comprising the following steps:

[0051] S1. By feeding agricultural products, the amplitude and speed of the vibrating screen machine 2 and the driving motor 44 are automatically adjusted, so that the agricultural products maintain a stable vibrating screen feeding speed and a uniform feeding speed, so that the feeding speed of the agricultural products and the screening rate of the agricultural products always maintain an adaptive relationship, and avoid the accumulation of agricultural products on the surface of the screening net 31;

[0052] S2. When some of the filter holes of the screening net 31 are clogged, the screening net 31 is automatically moved downward inside the vibrating screen 2 under pressure, thereby changing the transmission ratio between the driving shaft 42 and the driven shaft 45, and realizing automatic calibration and adjustment of the feeding amount of agricultural products, so that the feeding speed of conveying agricultural products and the speed of screening agricultural products return to a balanced adaptation relationship again;

[0053] S3, when the screening net 31 is completely blocked, the screening net 31 moves down to the surface of the guide rail 55, at which time the driving motor 44 is automatically turned off, and the vibrating screen 2 maintains the original screening rate, and then the conveying motor 38 is automatically started to remove the agricultural products accumulated on the surface of the screening net 31;

[0054] S4. When the screening net 31 moves down to the surface of the guide rail 55, the electric telescopic rod 52 and the electromagnet 54 will be automatically turned on, thereby driving the push plate 51 and the dredging frame 56 to move back and forth inside the vibrating screen 2 and the guide rail 55. The elastic force generated by the squeezing spring three 59 during the movement can be used to push the dredging top column 58 to clear and dredge the filter holes inside the screening net 31. After dredging, the feeder 6 can be started again to continue the sorting and screening operation of the agricultural products, and the whole process is automated.

[0055] When it is necessary to sort and screen the agricultural products, first start the driving motor 44 to drive the feeder 6 to operate, turn on the vibrating screen 2, and then place the agricultural products to be processed on the top of the feeder 6 for transportation. When the agricultural products fall from the discharge end of the feeder 6, the sorting and screening can be completed through the screening net 31. As the agricultural products fall, the gravity on the screening net 31 increases, and then the squeezing spring 32 is deformed and generates elastic force. With the cooperation of the support plate 34, the pressure sensor 33 is squeezed. Then, the pressure sensor 33 is squeezed to generate a piezoelectric signal, which is transmitted to the controller (not shown in the figure) and converted into a control signal. The controller then controls the vibrating screen 2 and the driving motor The amplitude and rotation speed of 44 can make the agricultural products maintain a stable vibration screening and uniform feeding speed, so as to achieve a stable balance between the feeding speed and the screening rate, and avoid the situation where the agricultural products block the filter holes of the screening net 31. During this period, the screening net 31 moves downward inside the vibrating screen 2, which can drive the rack 311 to move downward synchronously inside the vibrating screen 2, thereby driving the gear 312 and the transmission shaft 313 to rotate inside the vibrating screen 2, thereby driving the bevel gear group 2 483 and the transmission rod 482 to rotate on the outside of the vibrating screen 2. With the rotation of the transmission rod 482, the bevel gear group 1 481 and the bidirectional screw 48 can be driven to rotate below the speed regulating support plate 41. Then, the two groups of threaded blocks 49 are driven to move relatively along the spiral trajectory of the two-way screw rod 48 inside the speed regulating support plate 41. The movement of the threaded block 49 can drive the push sleeve 491 fixed at its end to slide on the surface of the driven shaft 45. Then, under the action of the convex rod 492, the lever 493 can be moved to rotate with the hinge shaft 494 as the center, and the other end of the lever 493 can pull another group of convex rods 492 and the push sleeve 491 to slide on the surface of the active shaft 42. Through the movement of the two groups of push sleeves 491, the distance between the two groups of active bevel wheels 43 and the two groups of driven bevel wheels 46 can be changed respectively, and the distance change is opposite. Then, under the action of the transmission belt 47 , to adjust the transmission ratio between the active shaft 42 and the driven shaft 45, and to achieve the effect of adjusting the running speed of the driving feeder 6 when the speed of the driving motor 44 remains stable, so that the feeding speed of the agricultural products transported by the feeder 6 and the speed of the vibrating screen 2 screening the agricultural products through the screening net 31 always maintain an adaptive relationship, thereby avoiding the accumulation of agricultural products on the surface of the screening net 31, resulting in blockage of the screening net 31, and preventing the sorting and screening efficiency of the agricultural products and the normal operation of the screening net 31 from being affected. There is no need to manually calibrate and adjust the feeding amount of agricultural products repeatedly, the degree of automation is high, and the adjustment accuracy is high, which is relatively convenient and fast, saving manpower and improving work efficiency.

[0056] As the sorting and screening process continues, if some of the filter holes of the screening net 31 are still accidentally blocked by a small amount of agricultural products, the blocked filter holes cannot normally screen the agricultural products as the agricultural products are continuously put in. At this time, the agricultural products put in due to the mismatch between the feeding speed and the screening speed will accumulate on the surface of the screening net 31, causing the screening net 31 to be subjected to greater downward pressure, thereby causing the spring 32 and the pressure sensor 33 to be subjected to greater extrusion force. As the extrusion force on the pressure sensor 33 increases, the corresponding piezoelectric signal becomes stronger and stronger, and is thus transmitted to the controller to be converted into a corresponding control signal. At this time, the control signal sent by the controller will immediately control the vibrating screen 2 to increase the screening rate, and control the drive motor 44 to reduce the speed, so as to reduce the feeding speed of the feeder 6. At the same time, as the screening net 31 moves down again, the transmission ratio between the active shaft 42 and the driven shaft 45 can be changed again, so as to realize automatic calibration and adjustment of the feeding amount of agricultural products again, so as to achieve the effect of returning the feeding speed of conveying agricultural products and the speed of screening agricultural products to a matching relationship again.

[0057] If the screening net 31 is completely blocked and cannot work normally, the agricultural products on the surface of the screening net 31 will continue to accumulate, causing the screening net 31 to be subjected to the maximum downward pressure and move down to the lowest position inside the vibrating screen 2, on the surface of the guide rail 55. The support of the guide rail 55 prevents the screening net 31 from moving further downward, causing damage to the spring 1 32 and the pressure sensor 1 33. At this time, the pressure sensor 1 33 is squeezed to a threshold value, and the generated piezoelectric signal will be immediately transmitted to the controller. At this time, the controller will immediately control and turn off the drive motor 44, so as to stop the delivery of agricultural products, and will control the vibrating screen 2 to maintain the original screening rate, and then will start immediately. The conveying motor 38 drives the spiral auger 39 to operate inside the conveying cylinder 37. Since the screening net 31 moves down to the lowest position inside the vibrating screen 2, the discharge end of the screening net 31 is opposite to the opening of the discharge port 351. Therefore, the agricultural products accumulated on the surface of the inclined screening net 31 and maintained in a vibrating state will fall into the feed hopper 36 from the discharge port 351 and the guide hopper 35 in turn, and then with the operation of the spiral auger 39, they will finally be discharged from the lower hopper 371, so that the agricultural products accumulated on the surface of the screening net 31 can be removed, so as to avoid the continuous accumulation of agricultural products on the screening net 31 and affect the subsequent dredging operation. The discharged agricultural products will be re-fed and screened through the feeder 6.

[0058] As the screening net 31 moves down to the lowest position, the screening net 31 will press down the contact plate 563, and the contact plate 563 squeezes the spring four 562 to deform and generate elastic force, thereby squeezing the pressure sensor two 561 to generate a piezoelectric signal, which is transmitted to the controller and converted into a control signal. Then the controller will control and start the electric telescopic rod 52 and the electromagnet 54. By starting the electric telescopic rod 52, the push plate 51 can be pulled to drive the electric telescopic rod 52 and the electromagnet 54 to move toward the guide hopper 35. During this period, the electromagnet 54 is energized to generate electromagnetic force. When the electromagnet 54 moves to a position close to the armature 57, the armature 57 is adsorbed by the electromagnetic force, and the connection between the push plate 51 and the dredging frame 56 is completed. Then, the push plate 51 is driven by the electric telescopic rod 52 to move back and forth inside the vibrating screen 2, which can drive the dredging frame 56 to slide along the inside of the guide slide rail 55, and then the movement of the dredging frame 56 can drive multiple groups of dredging inside it. The top post 58 is closely attached to the surface of the screening net 31 and moves synchronously. When the dredging top post 58 moves to a position on the surface of the screening net 31 where the filter holes are not located, the dredging top post 58 will be squeezed and slide inside the dredging frame 56, thereby squeezing the spring three 59 to deform and generate elastic force. As the dredging frame 56 and the dredging top post 58 are displaced, when the dredging top post 58 moves to the position where the filter holes are located, the compressed spring three 59 will be released and push the dredging top post 58 to push the agricultural products blocked in the filter holes through its own elastic force, thereby pushing the agricultural products out of the filter holes, and so on and so forth until all the agricultural products blocked in the screening net 31 are pushed out, thus completing the clearing and dredging of the screening net 31, so that the staff can clean the agricultural products blocked in the screening net 31 without disassembling the screening net 31, which brings great convenience to the staff, and the cleaning process is simple and easy to operate, thereby improving the efficiency and quality of removing blockages, further improving the sorting and screening efficiency of agricultural products, and automating the entire process.

[0059] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic sorting and screening device for deep processing of agricultural products, comprising a base (1), a vibrating screen (2) fixed on the surface of the base (1), and a feeder (6) fixed above the end of the vibrating screen (2); Features: A screening assembly (3) is installed above the base (1), and the screening assembly (3) comprises a screening net (31), a spring (32), a pressure sensor (33), a support plate (34), a guide hopper (35), a feed hopper (36), a conveying cylinder (37), a conveying motor (38) and a spiral auger (39); The vibrating screen (2) is slidably connected to a screening net (31) inside, springs (32) are fixed at four corners of the bottom of the screening net (31), a pressure sensor (33) is fixed at the bottom end of the spring (32), a support plate (34) is fixed between the pressure sensor (33) and the vibrating screen (2), a discharge port (351) is provided at the discharge end of the vibrating screen (2), a guide hopper (35) is welded on one side of the surface of the vibrating screen (2) close to the discharge port (351), a feed hopper (36) is provided at the bottom of the guide hopper (35), a conveying cylinder (37) is fixed between the feed hopper (36) and the base (1), and the A conveying motor (38) is screwed to the surface of one end of the conveying cylinder (37), a spiral auger (39) is rotatably connected to the inside of the conveying cylinder (37), and one end of the spiral auger (39) is fixedly connected to the output end of the conveying motor (38); a rack (311) is welded to the surface of one end of the screening net (31) close to the feeder (6), a gear (312) is meshedly connected to the surface of the rack (311), a transmission shaft (313) is fixed inside the gear (312), the transmission shaft (313) is rotatably connected to the inside of the vibrating screen (2), and a gear (311) and a gear (312) are provided inside the vibrating screen (2). (312) and a corresponding give-way groove; a lower hopper (371) is fixed to the bottom of one end of the conveying cylinder (37) away from the feed hopper (36); a speed regulating assembly (4) is installed between the transmission shaft (313) and the feeder (6); the speed regulating assembly (4) comprises a speed regulating support plate (41), a driving shaft (42), a driving cone wheel (43), a driving motor (44), a driven shaft (45), a driven cone wheel (46), a transmission belt (47), a bidirectional screw rod (48) and a threaded block (49); a speed regulating support plate (41) is welded on the surface of the feeder (6); and one side of the surface of the speed regulating support plate (41) is rotatably connected to the driving shaft (42). The surface key of the driving shaft (42) is connected to two groups of symmetrically arranged driving cone wheels (43), the surface screw of the speed regulating support plate (41) is connected to a driving motor (44), the other side of the surface of the speed regulating support plate (41) is rotatably connected to a driven shaft (45), the surface key of the driven shaft (45) is connected to two groups of symmetrically arranged driven cone wheels (46), the two groups of driven cone wheels (46) and the two groups of driving cone wheels (43) are belt-connected with a transmission belt (47), the bottom of the speed regulating support plate (41) is rotatably connected to a bidirectional screw rod (48), and both ends of the surface of the bidirectional screw rod (48) are threadedly connected to thread blocks (49);A bevel gear set 1 (481) is fixed to one end of the bidirectional screw rod (48) close to the transmission shaft (313), a transmission rod (482) is fixed to the other end of the bevel gear set 1 (481), the transmission rod (482) is rotatably connected to one side of the vibrating screen (2), and a bevel gear set 2 (483) is connected between an end of the transmission rod (482) away from the bevel gear set 1 (481) and an end of the transmission shaft (313) away from the gear (312); a moving groove matching the threaded block (49) is provided inside the speed regulating support plate (41), and both ends of the surfaces of the driving shaft (42) and the driven shaft (45) are slidably connected with push sleeves (491), and two groups of push sleeves (491) are respectively connected to the driving cone wheel (43) and the driven cone wheel (46 ) are rotatably connected, the top of the threaded block (49) is fixedly connected to one of the push sleeves (491), a convex rod (492) is fixedly provided on the surface of the push sleeve (491), a lever (493) is movably connected between the two sets of convex rods (492), a hinge shaft (494) is hingedly provided at the middle of the lever (493), and the hinge shaft (494) is welded to the surface of the speed regulating support plate (41), a fixing frame (495) is welded to the surface of the two sets of push sleeves (491), and a tension spring (496) is connected between the two fixing frames (495); the output end of the drive motor (44) is fixedly connected to one end of the driving shaft (42), and one end of the driven shaft (45) is fixedly connected to the driving end of the feeder (6). ; 2. The automatic sorting and screening device for deep processing of agricultural products according to claim 1 is characterized by: A dredging assembly (5) is arranged below the screening net (31), and the dredging assembly (5) comprises a push plate (51), a second spring (53), an electromagnet (54), a guide rail (55), a dredging frame (56), an armature (57), a dredging top column (58) and a third spring (59). A push groove is provided on one side of the vibrating screen (2), and a push plate (51) is slidably connected in the push groove. A plurality of groups of second springs (53) arranged at equal distances are fixed to one side of the surface of the push plate (51). The second springs (53) are arranged in a slidable manner. An electromagnet (54) is fixed at the top of the vibrating screen (2), guide rails (55) are symmetrically welded on both sides of the inner cavity of the vibrating screen (2), a dredging frame (56) is slidably connected between the two groups of guide rails (55), an armature (57) is fixed at the bottom end of the dredging frame (56), a plurality of groups of equidistantly arranged force storage grooves are provided inside the dredging frame (56), a dredging top column (58) is slidably connected in the force storage groove, and a spring three (59) is fixed between the dredging top column (58) and the dredging frame (56).

3. The automatic sorting and screening device for deep processing of agricultural products according to claim 2 is characterized by: An electric telescopic rod (52) is fixed on a side of the surface of the vibrating screen machine (2) close to the push plate (51), a connecting block (521) is fixed between the output end of the electric telescopic rod (52) and the bottom end of the push plate (51), and the distribution position of the dredging top column (58) inside the dredging frame (56) is adapted to the arrangement position of the filter holes inside the screening net (31).

4. The automatic sorting and screening device for deep processing of agricultural products according to claim 3 is characterized by: A second pressure sensor (561) is fixed to the surface end of the dredging frame (56), a fourth spring (562) is fixed to the surface of the second pressure sensor (561), and a contact plate (563) is fixed to the top end of the fourth spring (562).

5. A method using the automatic sorting and screening device for deep processing of agricultural products according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. By feeding agricultural products, the amplitude and speed of the vibrating screen (2) and the driving motor (44) are automatically adjusted, so that the agricultural products maintain a stable vibrating screen discharge speed and a uniform feeding speed, so that the feeding speed of the agricultural products and the screening rate of the agricultural products always maintain an adaptive relationship, and avoid the accumulation of agricultural products on the surface of the screening net (31); S2. When some of the filter holes of the screening net (31) are clogged, the screening net (31) is automatically moved downward inside the vibrating screen (2) under pressure, thereby changing the transmission ratio between the driving shaft (42) and the driven shaft (45), and realizing automatic calibration and adjustment of the feeding amount of the agricultural products, so that the feeding speed of the agricultural products and the speed of screening the agricultural products return to a balanced adaptation relationship; S3, when the screening net (31) is completely blocked, the screening net (31) moves down to the surface of the guide rail (55), at which time the drive motor (44) is automatically turned off, and the vibrating screen (2) maintains the original screening rate, and then the conveying motor (38) is automatically started to remove the agricultural products accumulated on the surface of the screening net (31); S4, when the screening net (31) moves down to the surface of the guide rail (55), the electric telescopic rod (52) and the electromagnet (54) are automatically turned on, thereby driving the push plate (51) and the dredging frame (56) to move back and forth inside the vibrating screen (2) and the guide rail (55). During the movement, the elastic force generated by the squeezing spring three (59) is used to push the dredging top column (58) to clear and dredge the filter holes inside the screening net (31). After the dredging is completed, the feeder (6) is started again to continue the sorting and screening operation of the agricultural products, and the whole process is automated.

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