Classification screening device for processing roasted melon seeds

Abstract

The invention discloses a grading screening device for processing roasted melon seeds, and belongs to the technical field of melon seed screening processing, and the grading screening device is technically characterized in that the grading screening device comprises a bottom plate, a material guiding and feeding mechanism can be synchronously driven to operate through an arranged material conveying screening mechanism, and vibration discharging treatment of the roasted melon seeds is achieved; unsmooth discharging caused by accumulation or blockage is avoided, meanwhile, synchronous rotation of auger blades correspondingly promotes uniform distribution and conveying of roasted melon seeds, the melon seeds can be automatically shunted in the screening process through the screening design of increasing the hole diameters one by one on the conveying screening mechanism, repeated manual screening is not needed, and the screening efficiency is improved. In addition, melon seeds with different sizes and weights can be more effectively separated through the arranged reciprocating screening mechanism, so that the screening efficiency is greatly improved, the screening time is shortened, the automation degree is high, and the melon seed screening device has the advantages of being capable of conducting pretreatment cleaning, facilitating classified screening and being good in screening effect.

Description

Technical Field

[0001] The invention relates to the field of melon seed screening and processing, and in particular to a grading and screening device for processing roasted melon seeds. Background Art

[0002] As a common snack food, melon seeds have a large market demand, and consumers have increasing requirements for product quality. In order to meet market demand, melon seed roasting processing companies generally need to process the melon seeds to ensure product quality and taste.

[0003] After the processing of roasted melon seeds is completed, the prior art needs to screen them to select melon seeds of different sizes for subsequent packaging and sale. However, the current conventional means are mostly manual hand-held screening plates for screening, which is inefficient and has high labor costs. Some also use vibration motors to vibrate the screening plates for screening, but this traditional screening method is inefficient and difficult to quickly complete multi-stage sorting. In addition, the size of the sieve holes of the sieve plate is fixed, resulting in roasted sand, pebbles, and dust mixed in the melon seeds passing through the sieve holes together with the melon seeds, which will seriously affect the quality of the melon seeds. There is a lack of corresponding pretreatment measures and it cannot meet the needs of actual use.

[0004] Therefore, it is necessary to provide a grading and screening device for processing roasted melon seeds and nuts, aiming to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention aims to provide a grading and screening device for processing roasted melon seeds, aiming to solve the technical problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A grading and screening device for processing melon seeds and roasted nuts comprises a bottom plate, a feeding platform is arranged on the bottom plate, a material guide plate for guiding materials is arranged inside the feeding platform, a feeding cylinder for feeding materials is docked and installed at the feeding platform, a screening cylinder for grading and screening is arranged on one side of the feeding cylinder, and further comprises: A material guiding and feeding mechanism is installed on the feeding platform and is used for guiding and unloading the melon seeds and roasted nuts. The material guiding and feeding mechanism includes a material guiding plate for guiding the material and a material unloading flip plate for flipping and unloading the material. The material guiding plate is obliquely installed inside the feeding platform, and the material unloading flip plate is rotatably installed on the feeding platform through a first connecting shaft; A material feeding and screening mechanism, which is installed on the material feeding cylinder and the screening cylinder, and is used for synchronously driving the material feeding in the material feeding cylinder and performing graded screening at the screening cylinder, the material feeding and screening mechanism comprises a first sieve hole, a second sieve hole and a third sieve hole for graded screening, the first sieve hole, the second sieve hole and the third sieve hole are all opened on the screening cylinder, the apertures of the first sieve hole, the second sieve hole and the third sieve hole are arranged to increase in sequence, and the first sieve hole is arranged close to the material feeding cylinder, a material guiding inclined surface for inclined material guiding is arranged in the screening cylinder, the material guiding inclined surface is inclined toward the third screening plate, and the material feeding and screening mechanism is used to drive the material guiding and feeding mechanism to perform material guiding operation; A reciprocating screening mechanism is installed on the bottom plate and is located below the screening drum, and is used for reciprocating vibration screening and processing of the incoming melon seeds and roasted nuts. The reciprocating screening mechanism includes a first screening plate, a second screening plate and a third screening plate for screening one by one. The apertures of the first screening plate, the second screening plate and the third screening plate are arranged to increase in sequence. The first screening plate is arranged in contact with the first sieve hole, the second screening plate is arranged in contact with the second sieve hole, and the third screening plate is arranged in contact with the third sieve hole. The first screening plate, the second screening plate and the third screening plate are all movably installed on a receiving plate, and the receiving plate is movably installed on the bottom plate through a third supporting plate.

[0007] As a further scheme of the present invention, the reciprocating screening mechanism also includes a first connecting rod and a second connecting rod for driving the first screening plate, the second screening plate and the third screening plate to reciprocate and screen, the first screening plate, the second screening plate and the third screening plate are all fixedly mounted on the second moving block through a support frame, the receiving plate is fixedly mounted on the first moving block, the second moving block and the first moving block are both movably mounted on the third support plate, the third support plate is fixedly mounted on the bottom plate, one end of the first connecting rod is rotatably mounted on the first moving block through a first connecting column, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod through a second connecting column, and the other end of the second connecting rod is rotatably mounted on the second moving block through the third connecting column.

[0008] As a further solution of the present invention, the reciprocating screening mechanism also includes a second motor for driving the receiving plate to move relative to the screening, the third support plate is provided with a second slide groove adapted for sliding connection with the second moving block, the third support plate is also provided with a first slide groove adapted for sliding connection with the first moving block, second springs are arranged at the internal connection between the two sides of the second moving block and the second slide groove, first springs are arranged at the internal connection between the two sides of the first moving block and the second slide groove, the first connecting column is fixedly connected to the output shaft of the second motor, and the second motor is fixedly mounted on the first moving block.

[0009] As a further solution of the present invention, the reciprocating screening mechanism also includes an L-shaped slide and a guide docking seat for driving the first screening plate, the second screening plate and the third screening plate for vibration screening. The L-shaped slides are fixedly mounted on the first screening plate, the second screening plate and the third screening plate, and the L-shaped slides are movably mounted inside the guide docking seat. The guide docking seat is fixedly mounted on the receiving plate, and the length and width of the receiving plate are greater than the first screening plate, the second screening plate and the third screening plate. A plurality of first protrusions are arranged on the L-shaped slide, and a plurality of second protrusions that are adapted to dock with the first protrusions are arranged on the guide docking seat.

[0010] As a further solution of the present invention, the material feeding and screening mechanism also includes a third connecting shaft and a first motor for driving the screening drum for rotational screening. The third connecting shaft is fixedly installed inside the screening drum through a fixed frame. The third connecting shaft is rotatably connected to the output shaft of the first motor through a second synchronous belt. The first motor is fixedly installed on the second support plate, and the second support plate is fixedly installed on the base plate.

[0011] As a further solution of the present invention, the material conveying and screening mechanism also includes guide wheels for assisting the rotation of the screening drum. The number of the guide wheels is several and all are rotatably mounted on a fourth support plate. The fourth support plate is fixedly mounted on the bottom plate, and the guide wheels are adapted to be rotatably connected to the outside of the screening drum.

[0012] As a further scheme of the present invention, the material feeding and screening mechanism also includes an auger blade and a feed shaft for feeding connection in the material feeding cylinder. The auger blade is rotatably installed inside the material feeding cylinder through the feed shaft, and one end of the feed shaft is fixedly connected to a third connecting shaft. The material feeding cylinder is fixedly installed on the base plate through a first support plate. A feed port and a discharge port are provided on the material feeding cylinder. The feed port is arranged toward the feed platform, and the discharge port is arranged toward the screening cylinder. One end of the material feeding cylinder is fixedly connected to a material guide annular plate, and the material guide annular plate is adapted to be movably connected to the inside of the screening cylinder.

[0013] As a further solution of the present invention, the feeding and screening mechanism also includes a dust extractor for dust removal and a collection box for impurity removal. The feeding barrel is provided with ventilation holes and slag discharge holes. A dust extractor is installed on one side of the ventilation holes, and a collection box is installed on one side of the slag discharge holes. A drawer is movably installed on the collection box.

[0014] As a further solution of the present invention, the material guiding and feeding mechanism also includes a second connecting shaft and a ball head impact rod for driving the material guide plate to vibrate and discharge the material. The first connecting shaft is rotatably connected to the second connecting shaft through a first synchronous belt. The second connecting shaft is rotatably installed inside the feeding table. The second connecting shaft is provided with a plurality of ball head impact rods for knocking the material. The ball head impact rod is in contact and connected with the bottom of the material guide plate. One end of the first connecting shaft is fixedly connected to the feed shaft.

[0015] In summary, compared with the prior art, the embodiments of the present invention have the following beneficial effects: The present invention can synchronously drive the material guiding and feeding mechanism to operate through the material feeding and screening mechanism, thereby realizing the vibration feeding processing of melon seeds and roasted nuts, avoiding the poor feeding caused by accumulation or blockage. At the same time, the synchronous rotation of the auger blades also correspondingly promotes the uniform distribution and transportation of melon seeds and roasted nuts, so that the melon seeds and roasted nuts can enter the screening barrel at the same speed and manner, providing a good foundation for subsequent screening work, thereby improving the continuity and stability of the screening work, and further improving the screening efficiency and quality.

[0016] In addition, through the screening design of gradually increasing the aperture of the feeding and screening mechanism, the melon seeds and roasted nuts can be separated more effectively during the screening process. Smaller melon seeds and roasted nuts will quickly pass through the smaller sieve holes, while larger melon seeds will remain in the screening barrel and continue to move downward until they encounter suitable sieve holes. This design reduces the residence time of melon seeds on the sieve holes and the friction between them, thereby improving the screening efficiency and allowing the melon seeds to be automatically diverted during the screening process without the need for multiple manual screenings, thereby greatly simplifying the production process, reducing labor and time costs, and improving overall production efficiency.

[0017] The reciprocating screening mechanism can make the melon seeds and roasted nuts distribute quickly and evenly on the screen surface. At the same time, the force generated by vibration can be used to more effectively separate the melon seeds of different sizes and weights. This screening method greatly improves the screening efficiency and reduces the screening time. At the same time, it has a high degree of automation, which greatly reduces manual intervention and labor intensity, making the screening effect more consistent and helping to maintain the continuity and stability of the production line.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the invention.

[0020] Figure 2 It is a side structural schematic diagram of an embodiment of the invention.

[0021] Figure 3 It is a schematic diagram of the top structure of an embodiment of the invention.

[0022] Figure 4 It is a schematic diagram of the connection structure inside the feed table in an embodiment of the invention.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the connection of the feeding cylinder in the embodiment of the invention.

[0024] Figure 6 It is a schematic diagram of the explosion structure of the side connection of the feeding cylinder in the embodiment of the invention.

[0025] Figure 7 It is a schematic cross-sectional view of the connection of the screening drum in an embodiment of the invention.

[0026] Figure 8 It is a schematic diagram of the connection structure of the receiving tray in the embodiment of the invention.

[0027] Fig. 9 It is a schematic diagram of the connection structure of the third support plate in an embodiment of the invention.

[0028] Fig.10 It is a side view structural diagram of the third support plate connection in an embodiment of the invention.

[0029] Fig.11 It is a schematic diagram of the exploded structure of the L-shaped slide connection in the embodiment of the invention.

[0030] Fig.12 It is a schematic side view of the explosion structure connected by the L-shaped sliding plate in the embodiment of the invention.

[0031] Figure numerals: 1, bottom plate; 2, feed table; 3, guide plate; 4, first connecting shaft; 5, unloading turning plate; 6, first synchronous belt; 7, second connecting shaft; 8, ball head impact rod; 9, first supporting plate; 10, feed barrel; 11, dust extractor; 12, collection box; 13, drawer; 14, ventilation hole; 15, slag discharge hole; 16, feed shaft; 17, auger blade; 18, feed port; 19, discharge port; 20, guide ring plate; 21, screen barrel; 22, first screen hole; 23, second screen hole; 24, third screen hole; 25, third connecting shaft; 26, fixed frame; 27, guide slope; 28, second synchronous belt; 29 , the first motor; 30, the second support plate; 31, the first screening plate; 32, the second screening plate; 33, the third screening plate; 34, the receiving plate; 35, the L-shaped slide plate; 36, the guide docking seat; 37, the first protrusion; 38, the second protrusion; 39, the first moving block; 40, the first spring; 41, the first slide groove; 42, the second motor; 43, the first connecting column; 44, the first connecting rod; 45, the second connecting column; 46, the second connecting rod; 47, the third connecting column; 48, the second moving block; 49, the second spring; 50, the second slide groove; 51, the support frame; 52, the third support plate; 53, the fourth support plate; 54, the guide wheel. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0034] Example 1

[0035] See also Figure 1 to Figure 7 A grading and screening device for processing melon seeds and roasted nuts comprises a bottom plate 1, a feeding platform 2 is arranged on the bottom plate 1, a material guide plate 3 for guiding materials is arranged in the feeding platform 2, a feeding cylinder 10 for feeding materials is installed at the feeding platform 2, a screening cylinder 21 for grading and screening is arranged on one side of the feeding cylinder 10, and further comprises: The material guiding and feeding mechanism is installed on the feeding platform 2, and is used for guiding and discharging the melon seeds and roasted nuts put in. The material guiding and feeding mechanism includes a material guiding plate 3 for guiding the material and a material discharging flip plate 5 for flipping and discharging the material. The material guiding plate 3 is obliquely installed inside the feeding platform 2, and the material discharging flip plate 5 is rotatably installed on the feeding platform 2 through the first connecting shaft 4; The material feeding and screening mechanism is installed on the material feeding drum 10 and the screening drum 21, and is used for synchronously driving the material feeding in the material feeding drum 10 and the graded screening processing at the screening drum 21. The material feeding and screening mechanism includes a first sieve hole 22, a second sieve hole 23 and a third sieve hole 24 for graded screening. The first sieve hole 22, the second sieve hole 23 and the third sieve hole 24 are all opened on the screening drum 21. The apertures of the first sieve hole 22, the second sieve hole 23 and the third sieve hole 24 are arranged to increase in sequence, and the first sieve hole 22 is arranged close to the material feeding drum 10. A material guiding slope 27 for inclined material guiding is arranged in the screening drum 21. The material guiding slope 27 is inclined toward the third screening plate 33, and the material feeding and screening mechanism is used to drive the material guiding and feeding mechanism to perform material guiding operation.

[0036] Furthermore, the material feeding and screening mechanism also includes a third connecting shaft 25 and a first motor 29 for driving the screening drum 21 for rotational screening. The third connecting shaft 25 is fixedly installed inside the screening drum 21 through a fixing frame 26. The third connecting shaft 25 is rotationally connected to the output shaft of the first motor 29 through a second synchronous belt 28. The first motor 29 is fixedly installed on the second support plate 30, and the second support plate 30 is fixedly installed on the base plate 1.

[0037] Furthermore, the material feeding and screening mechanism also includes guide wheels 54 for assisting the rotation of the screening drum 21. There are several guide wheels 54, which are all rotatably mounted on the fourth support plate 53. The fourth support plate 53 is fixedly mounted on the base plate 1, and the guide wheels 54 are all adapted to be rotatably connected to the outer side of the screening drum 21.

[0038] Furthermore, the material feeding and screening mechanism also includes an auger blade 17 and a feed shaft 16 for feeding connection in the material feeding barrel 10. The auger blade 17 is rotatably installed inside the material feeding barrel 10 through the feed shaft 16, and one end of the feed shaft 16 is fixedly connected to the third connecting shaft 25. The material feeding barrel 10 is fixedly installed on the base plate 1 through the first support plate 9. A feed port 18 and a discharge port 19 are provided on the material feeding barrel 10. The feed port 18 is arranged toward the feed table 2, and the discharge port 19 is arranged toward the screening barrel 21. One end of the material feeding barrel 10 is fixedly connected to a material guide annular plate 20, and the material guide annular plate 20 is adapted to be movably connected to the inside of the screening barrel 21.

[0039] Furthermore, the feeding and screening mechanism also includes a dust extractor 11 for dust removal and a collecting box 12 for impurity removal. The feeding barrel 10 is provided with a ventilation hole 14 and a slag discharge hole 15. The dust extractor 11 is installed on one side of the ventilation hole 14, and the collecting box 12 is installed on one side of the slag discharge hole 15. A drawer 13 is movably installed on the collecting box 12.

[0040] Furthermore, the material guiding and feeding mechanism also includes a second connecting shaft 7 and a ball head impact rod 8 for driving the material guide plate 3 to vibrate and discharge the material. The first connecting shaft 4 is rotatably connected to the second connecting shaft 7 through the first synchronous belt 6. The second connecting shaft 7 is rotatably installed inside the feeding table 2. A plurality of ball head impact rods 8 for knocking the material are arranged on the second connecting shaft 7. The ball head impact rods 8 are in contact and connected with the bottom of the material guide plate 3. One end of the first connecting shaft 4 is fixedly connected to the feed shaft 16.

[0041] Preferably, when the melon seeds and roasted nuts are being screened, the melon seeds and roasted nuts that need to be screened are placed on the feeding table 2, and the output shaft of the first motor 29 drives the third connecting shaft 25 to rotate under the synchronous driving action of the second synchronous belt 28, so that the third connecting shaft 25 correspondingly drives the first connecting shaft 4 on the feed shaft 16 to rotate, and the first connecting shaft 4 drives the unloading flip plate 5 to flip, thereby facilitating the unloading operation of the melon seeds and roasted nuts, and the first connecting shaft 4 drives the ball head impact rod 8 on the second connecting shaft 7 to rotate under the synchronous driving action of the first synchronous belt 6, and the reciprocating knocking action of the ball head impact rod 8 facilitates the vibration unloading processing of the guide plate 3, thereby facilitating the melon seeds and roasted nuts on the guide plate 3 to enter the interior of the feed barrel 10 from the feed port 18.

[0042] The feed shaft 16 correspondingly drives the auger blades 17 to rotate, thereby facilitating the transportation of the melon seeds and roasted nuts entering the feed barrel 10. During the transportation of the melon seeds and roasted nuts, tiny stones and roasted sand in the melon seeds and roasted nuts can be screened out from the slag discharge holes 15 and collected in the collecting box 12, and the dust extractor 11 performs dust removal operation, which is convenient for extracting the dust generated during transportation, thereby largely avoiding the dust generated by subsequent screening.

[0043] This synchronous vibration feeding method can ensure that the melon seeds and roasted nuts are distributed more evenly during the feeding process, avoiding poor feeding due to accumulation or blockage. At the same time, the synchronous rotation of the auger blades 17 also promotes the uniform distribution and transportation of the melon seeds and roasted nuts, so that the melon seeds and roasted nuts can enter the screening barrel 21 at the same speed and in the same manner, providing a good foundation for subsequent screening work, thereby improving the continuity and stability of the screening work, and further improving the screening efficiency and quality.

[0044] The roasted melon seeds and nuts conveyed from the feeding drum 10 can enter the interior of the screening drum 21 from the discharge port 19 and the guide annular plate 20, and the third connecting shaft 25 drives the screening drum 21 to perform a slow rotational screening process. Due to the inclined setting of the guide slope 27 and the successively increasing apertures of the first sieve hole 22, the second sieve hole 23 and the third sieve hole 24, the graded screening process of the roasted melon seeds and nuts is achieved. At this time, the smaller roasted melon seeds and nuts are screened out from the first sieve hole 22, the medium-sized roasted melon seeds and nuts are screened out from the second sieve hole 23, and the larger roasted melon seeds and nuts are screened out from the third sieve hole 24, thereby achieving a good screening process for the roasted melon seeds and nuts.

[0045] Through this screening design of gradually increasing the aperture, melon seeds and roasted nuts can be separated more effectively during the screening process. Smaller melon seeds and roasted nuts will quickly pass through the smaller sieve holes, while larger melon seeds will remain in the screening barrel 21 and continue to move downward until they encounter suitable sieve holes. This design reduces the residence time of melon seeds on the sieve holes and the friction between them, thereby improving the screening efficiency, allowing the melon seeds to be automatically diverted during the screening process without the need for multiple manual screenings, thereby greatly simplifying the production process, reducing labor costs and time costs, and improving overall production efficiency.

[0046] It should be noted that the first connecting shaft 4 and the second connecting shaft 7 are both provided with pulleys synchronously connected to the first synchronous belt 6 , and the third connecting shaft 25 and the output shaft of the first motor 29 are both provided with pulleys synchronously connected to the second synchronous belt 28 .

[0047] Example 2

[0048] like Figures 1 to 12 As shown, on the basis of Example 1, this embodiment further includes a reciprocating screening mechanism, which is installed on the bottom plate 1 and is located below the screening drum 21, and is used for reciprocating vibration screening and processing of the incoming melon seeds and roasted nuts. The reciprocating screening mechanism includes a first screening plate 31, a second screening plate 32 and a third screening plate 33 for screening one by one, and the apertures of the first screening plate 31, the second screening plate 32 and the third screening plate 33 are arranged to increase in sequence, the first screening plate 31 is arranged in contact with the first sieve hole 22, the second screening plate 32 is arranged in contact with the second sieve hole 23, the third screening plate 33 is arranged in contact with the third sieve hole 24, and the first screening plate 31, the second screening plate 32 and the third screening plate 33 are all movably mounted on the receiving plate 34, and the receiving plate 34 is movably mounted on the bottom plate 1 through the third support plate 52.

[0049] Furthermore, the reciprocating screening mechanism also includes a first connecting rod 44 and a second connecting rod 46 for driving the first screening plate 31, the second screening plate 32 and the third screening plate 33 to reciprocate for screening. The first screening plate 31, the second screening plate 32 and the third screening plate 33 are all fixedly mounted on the second moving block 48 through the support frame 51, the receiving plate 34 is fixedly mounted on the first moving block 39, the second moving block 48 and the first moving block 39 are both movably mounted on the third support plate 52, the third support plate 52 is fixedly mounted on the base plate 1, one end of the first connecting rod 44 is rotatably mounted on the first moving block 39 through the first connecting column 43, the other end of the first connecting rod 44 is rotatably connected to one end of the second connecting rod 46 through the second connecting column 45, and the other end of the second connecting rod 46 is rotatably mounted on the second moving block 48 through the third connecting column 47.

[0050] Furthermore, the reciprocating screening mechanism also includes a second motor 42 for driving the receiving plate 34 to move relative to the screening, a second slide groove 50 adapted to be slidably connected to the second moving block 48 is provided on the third support plate 52, and a first slide groove 41 adapted to be slidably connected to the first moving block 39 is also provided on the third support plate 52, second springs 49 are provided at the internal connection between the two sides of the second moving block 48 and the second slide groove 50, and first springs 40 are provided at the internal connection between the two sides of the first moving block 39 and the second slide groove 50, the first connecting column 43 is fixedly connected to the output shaft of the second motor 42, and the second motor 42 is fixedly mounted on the first moving block 39.

[0051] Furthermore, the reciprocating screening mechanism also includes an L-shaped slide 35 and a guide docking seat 36 for driving the first screening plate 31, the second screening plate 32 and the third screening plate 33 for vibration screening. The L-shaped slide 35 is fixedly installed on the first screening plate 31, the second screening plate 32 and the third screening plate 33, and the L-shaped slide 35 is movably installed inside the guide docking seat 36. The guide docking seat 36 is fixedly installed on the receiving plate 34, and the length and width of the receiving plate 34 are greater than the first screening plate 31, the second screening plate 32 and the third screening plate 33. A plurality of first protrusions 37 are arranged on the L-shaped slide 35, and a plurality of second protrusions 38 that are adapted to dock with the first protrusions 37 are arranged on the guide docking seat 36.

[0052] Preferably, in the present embodiment, the melon seeds and roasted nuts screened out one by one from the first sieve hole 22, the second sieve hole 23 and the third sieve hole 24 fall into the first sieve plate 31, the second sieve plate 32 and the third sieve plate 33 below for further screening processing, and at this time, the output shaft of the second motor 42 drives the first connecting rod 44 on the first connecting column 43 to rotate continuously, so that under the rotation connection between the first connecting rod 44 and the second connecting rod 46 and the elastic action of the first spring 40 and the second spring 49, the receiving plate 34 and the first sieve plate 31, the second sieve plate 32 and the third sieve plate 33 above it can be driven to reciprocate for screening processing, and the first sieve plate 3 1. When the L-shaped slide plates 35 on the second screening tray 32 and the third screening tray 33 reciprocate in the guide docking seat 36, due to the contact setting of the first protrusion 37 and the second protrusion 38, the first screening tray 31, the second screening tray 32 and the third screening tray 33 are driven to perform reciprocating vibration screening processing, which better simulates the manual screening process. At the same time, since the length and width of the receiving tray 34 are greater than the first screening tray 31, the second screening tray 32 and the third screening tray 33, various types of more qualified melon seeds and roasted nuts are screened and left on the first screening tray 31, the second screening tray 32 and the third screening tray 33, which is convenient for later collection and processing.

[0053] The continuous reciprocating vibration of the screening plate can promote the rapid and even distribution of melon seeds and roasted nuts on the screen surface, and at the same time use the force generated by vibration to more effectively separate melon seeds of different sizes and weights. This screening method greatly improves the screening efficiency and reduces the screening time, thereby improving the overall production efficiency. At the same time, the high degree of automation greatly reduces manual intervention and labor intensity, making the screening effect more consistent, which helps to maintain the continuity and stability of the production line.

[0054] It should be particularly noted that the components in this application are all universal standard parts or components well known to those skilled in the art, which effectively solve the technical problems raised in the background technology.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grading and screening device for processing melon seeds and roasted nuts, comprising a bottom plate (1), characterized in that: A feed platform (2) is arranged on the bottom plate (1), a material guide plate (3) for guiding materials is arranged inside the feed platform (2), a material conveying cylinder (10) for conveying materials is installed at the feed platform (2), and a screening cylinder (21) for grading and screening is arranged on one side of the material conveying cylinder (10), and further comprises: A material guiding and feeding mechanism is installed on the feeding platform (2) and is used for guiding and discharging the melon seeds and roasted nuts that are placed therein, the material guiding and feeding mechanism comprising a material guiding plate (3) for guiding the materials and a material discharging flip plate (5) for flipping and discharging the materials, the material guiding plate (3) being installed obliquely inside the feeding platform (2), and the material discharging flip plate (5) being rotatably installed on the feeding platform (2) via a first connecting shaft (4); A material feeding and screening mechanism, which is installed on the material feeding cylinder (10) and the screening cylinder (21), and is used for synchronously driving the material feeding in the material feeding cylinder (10) and the grading and screening processing at the screening cylinder (21), the material feeding and screening mechanism comprising a first sieve hole (22), a second sieve hole (23) and a third sieve hole (24) for grading and screening, the first sieve hole (22), the second sieve hole (23) and the third sieve hole (24) are all provided on the screening cylinder (21), the apertures of the first sieve hole (22), the second sieve hole (23) and the third sieve hole (24) are arranged to increase in sequence, and the first sieve hole (22) is arranged close to the material feeding cylinder (10), a material guiding inclined surface (27) for inclined material guiding is arranged in the screening cylinder (21), the material guiding inclined surface (27) is arranged to be inclined toward the third screening plate (33), and the material feeding and screening mechanism is used for driving the material guiding and feeding mechanism to perform material guiding operation; A reciprocating screening mechanism is mounted on a bottom plate (1) and is located below a screening barrel (21), and is used for reciprocatingly vibrating and screening the melon seeds and roasted nuts that are fed. The reciprocating screening mechanism comprises a first screening plate (31), a second screening plate (32), and a third screening plate (33) for screening one by one. The apertures of the first screening plate (31), the second screening plate (32), and the third screening plate (33) are arranged to increase in sequence. The first screening plate (31) is arranged in contact with the first screening hole (22), the second screening plate (32) is arranged in contact with the second screening hole (23), and the third screening plate (33) is arranged in contact with the third screening hole (24). The first screening plate (31), the second screening plate (32), and the third screening plate (33) are all movably mounted on a receiving plate (34), and the receiving plate (34) is movably mounted on the bottom plate (1) via a third support plate (52).

2. The grading and screening device for processing roasted melon seeds and nuts according to claim 1, characterized in that: The reciprocating screening mechanism further comprises a first connecting rod (44) and a second connecting rod (46) for driving the first screening material plate (31), the second screening material plate (32) and the third screening material plate (33) to reciprocate and screen; the first screening material plate (31), the second screening material plate (32) and the third screening material plate (33) are all fixedly mounted on the second moving block (48) via a support frame (51); the receiving plate (34) is fixedly mounted on the first moving block (39); the second moving block (48) and the first moving block (39) are connected to the first moving block (48) and the receiving plate (34) are connected to the first moving block (39); The blocks (39) are movably mounted on a third support plate (52), the third support plate (52) is fixedly mounted on the bottom plate (1), one end of the first connecting rod (44) is rotatably mounted on the first moving block (39) via a first connecting column (43), the other end of the first connecting rod (44) is rotatably connected to one end of a second connecting rod (46) via a second connecting column (45), and the other end of the second connecting rod (46) is rotatably mounted on the second moving block (48) via a third connecting column (47).

3. The grading and screening device for processing roasted melon seeds and nuts according to claim 2, characterized in that: The reciprocating screening mechanism further comprises a second motor (42) for driving the receiving plate (34) to move relatively for screening; the third support plate (52) is provided with a second slide groove (50) adapted to be slidably connected to the second moving block (48); the third support plate (52) is further provided with a first slide groove (41) adapted to be slidably connected to the first moving block (39); second springs (49) are provided at the connection between the two sides of the second moving block (48) and the inner part of the second slide groove (50); first springs (40) are provided at the connection between the two sides of the first moving block (39) and the inner part of the second slide groove (50); the first connecting column (43) is fixedly connected to the output shaft of the second motor (42); and the second motor (42) is fixedly mounted on the first moving block (39).

4. The grading and screening device for processing roasted melon seeds and nuts according to claim 3, characterized in that: The reciprocating screening mechanism further comprises an L-shaped slide plate (35) and a guide docking seat (36) for driving the first screening material plate (31), the second screening material plate (32) and the third screening material plate (33) to vibrate and screen. The L-shaped slide plate (35) is fixedly mounted on the first screening material plate (31), the second screening material plate (32) and the third screening material plate (33), and the L-shaped slide plate (35) is movably mounted inside the guide docking seat (36). The guide docking seat (36) is fixedly mounted on the receiving plate (34), and the length and width of the receiving plate (34) are greater than those of the first screening material plate (31), the second screening material plate (32) and the third screening material plate (33). The L-shaped slide plate (35) is provided with a plurality of first protrusions (37), and the guide docking seat (36) is provided with a plurality of second protrusions (38) adapted to be docked with the first protrusions (37).

5. The grading and screening device for processing roasted melon seeds and nuts according to claim 1, characterized in that: The material feeding and screening mechanism further comprises a third connecting shaft (25) and a first motor (29) for driving the screening drum (21) to rotate and screen, the third connecting shaft (25) being fixedly mounted inside the screening drum (21) via a fixing frame (26), the third connecting shaft (25) being rotationally connected to an output shaft of the first motor (29) via a second synchronous belt (28), the first motor (29) being fixedly mounted on a second support plate (30), and the second support plate (30) being fixedly mounted on the bottom plate (1).

6. The grading and screening device for processing roasted melon seeds and nuts according to claim 5, characterized in that: The material conveying and screening mechanism further comprises guide wheels (54) for assisting the rotation of the screening drum (21); the guide wheels (54) are multiple in number and are all rotatably mounted on a fourth support plate (53); the fourth support plate (53) is fixedly mounted on the bottom plate (1); and the guide wheels (54) are all adapted to be rotatably connected to the outside of the screening drum (21).

7. The grading and screening device for processing roasted melon seeds and nuts according to claim 5, characterized in that: The material feeding and screening mechanism further comprises an auger blade (17) and a material feeding shaft (16) for material feeding connection in the material feeding barrel (10); the auger blade (17) is rotatably mounted inside the material feeding barrel (10) via the material feeding shaft (16); and one end of the material feeding shaft (16) is fixedly connected to a third connecting shaft (25); the material feeding barrel (10) is fixedly mounted on the bottom plate (1) via a first support plate (9); a feed port (18) and a discharge port (19) are provided on the material feeding barrel (10); the feed port (18) is arranged toward the feed platform (2); and the discharge port (19) is arranged toward the screening barrel (21); one end of the material feeding barrel (10) is fixedly connected to a material guide annular plate (20); and the material guide annular plate (20) is adapted to be movably connected to the inside of the screening barrel (21).

8. The grading and screening device for processing roasted melon seeds and nuts according to claim 7, characterized in that: The material conveying and screening mechanism further comprises a dust extractor (11) for dust removal and a collection box (12) for impurity removal. The material conveying cylinder (10) is provided with a ventilation hole (14) and a slag discharge hole (15). The dust extractor (11) is mounted on one side of the ventilation hole (14). The collection box (12) is mounted on one side of the slag discharge hole (15). A drawer (13) is movably mounted on the collection box (12).

9. The grading and screening device for processing roasted melon seeds and nuts according to claim 1, characterized in that: The material guide feeding mechanism further comprises a second connecting shaft (7) and a ball head impact rod (8) for driving the material guide plate (3) to vibrate and discharge the material; the first connecting shaft (4) is rotatably connected to the second connecting shaft (7) via a first synchronous belt (6); the second connecting shaft (7) is rotatably mounted inside the feeding platform (2); a plurality of ball head impact rods (8) for striking and discharging the material are arranged on the second connecting shaft (7); the ball head impact rods (8) are in contact with and connected to the bottom of the material guide plate (3); and one end of the first connecting shaft (4) is fixedly connected to the material feeding shaft (16).

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