A grading and screening device for processing melon seeds and roasted nuts

Abstract

The present invention relates to the technical field of melon seed roasting processing, specifically a grading and screening device for melon seed roasting processing, comprising a base, a first pillar and a second pillar located directly in front of the first pillar are fixedly installed on the upper end surface of the base, and a screening mechanism for using a single barrel to implement different-sized screening of melon seeds is commonly provided between the first pillar and the second pillar. An integrated operation model of screening, impurity removal and collection is adopted to complete the single-barrel multi-stage screening of melon seeds roasting and the separate collection of melon seeds of different sizes, and impurities are removed by wind during the falling process of the melon seeds, integrating multi-stage screening and impurity removal functions, improving screening efficiency, reducing the space occupied by equipment, optimizing the layout of the production workshop, and at the same time, melon seeds of different sizes are collected separately in real time to avoid mixing and improve classification accuracy, and synchronous screening and collection reduce the residence time of melon seeds on the production line, improve overall production efficiency, and optimize subsequent processing procedures.

Description

Technical Field

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

[0002] Roasted melon seeds refer to a kind of snack food made from melon seeds as the main raw material and processed through a frying process. Because melon seeds vary in size, they need to be graded and screened after frying in order to pick out seeds of consistent size and shape, ensuring the consistency of the final product in terms of vision and taste, and improving the overall quality of roasted melon seeds.

[0003] At present, there are the following disadvantages in screening melon seeds and roasted nuts: 1. When screening melon seeds and roasted nuts, it is usually necessary to pour the melon seeds directly into the sieve drum, use the rolling of the sieve drum to screen the small melon seeds, and take out the melon seeds in the first sieve drum after the screening is completed, and then pour them into another sieve drum with larger sieve holes to repeat the process until the screening of the melon seeds is completed. In the above screening process, it is necessary to use multiple sieve drums with different sieve holes to cooperate with each other to complete the grading and screening of the melon seeds, and coordinating multiple sieve drums will increase the complexity of screening, and multiple screening steps will prolong the screening processing time; 2. In the process of continuous rolling of the sieve drum to screen the melon seeds, some melon seeds will be stuck in the sieve holes, thereby hindering the passage of other melon seeds, affecting the screening speed, and the melon seeds may be stuck for a long time, causing the sieve holes to deform or damage, and the stuck melon seeds may be broken, which will lead to incomplete screening of the melon seeds and inaccurate grading, affecting the quality of the final product. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides a grading and screening device for processing roasted melon seeds, which is achieved by the following specific technical means: a grading and screening device for processing roasted melon seeds, comprising a base, a first pillar and a second pillar located directly in front of the first pillar are fixedly mounted on the upper end surface of the base, and a screening mechanism for screening melon seeds of different sizes using a single barrel is jointly arranged between the first pillar and the second pillar.

[0005] The screening mechanism includes a supporting part which is jointly arranged between a first pillar and a second pillar and is used for rolling screening of melon seeds. A driving part which provides power to the supporting part is arranged on the first pillar. A screening part which is used for screening and scraping the melon seeds is arranged on the supporting part. A blocking part which is used for blocking the melon seeds and cooperating with the driving part to stir the melon seeds is arranged on the supporting part. A cooperating part which cooperates with the blocking part and is used for driving the melon seeds to move to a corresponding screening position is arranged on the second pillar.

[0006] A collecting mechanism is provided between the first pillar and the second pillar for cooperating with the screening mechanism to collect melon seeds of corresponding sizes; the collecting mechanism includes a bearing part provided between the first pillar and the second pillar, the bearing part is provided with a connecting part for cooperating with the blocking part to adjust the collection position of melon seeds of different sizes, and the connecting part is provided with a collecting part cooperating with the bearing part.

[0007] The first pillar and the second pillar are both provided with a cleaning mechanism for removing impurities from the melon seeds by wind.

[0008] As a preferred technical solution of the present invention, the support part includes a support, a first shaft column, a rotating cylinder and a second shaft column. The support is fixedly installed on the upper end of the first pillar, the front end surface of the support is installed with the first shaft column through a bearing, the front end of the first shaft column is fixedly installed with the rotating cylinder through a set support rod, the rotating cylinder is inclined, and the center of the front end surface of the rotating cylinder is fixedly installed with a second shaft column connected to the bearing of the second pillar. The rotating cylinder, the first shaft column and the second shaft column are coaxial, and a through hole is opened at the center of the second shaft column.

[0009] As a preferred technical solution of the present invention, the driving part includes a first gear, a first fixed plate and a first motor. The first gear is fixedly sleeved on the outer ring wall of the first shaft column, the first fixed plate is fixedly installed on the front end surface of the support, the first motor is fixedly installed on the first fixed plate, and the output end of the first motor is fixedly sleeved with a second gear meshingly connected to the first gear.

[0010] As a preferred technical solution of the present invention, the screening part includes sieve holes and a brush plate. The annular wall of the rotating drum is penetrated with a plurality of sieve holes in an array manner. The apertures of the sieve holes are arranged from large to small from front to back. A brush plate is fixedly installed between the upper ends of the first pillar and the second pillar by a support rod. The rubber brush arranged on the lower end surface of the brush plate is in contact with the outer annular wall of the rotating drum.

[0011] As a preferred technical solution of the present invention, the mating part includes a second fixed plate, a bearing seat, a screw barrel and a second motor. The second fixed plate is fixedly installed on the front end face of the second pillar, the bearing seat is fixedly installed on the lower end face of the second fixed plate, a screw barrel coaxial with the second shaft column is rotatably installed in the bearing seat, the second motor is fixedly installed on the second fixed plate, and the output end of the second motor is connected to the screw barrel through a first transmission gear group.

[0012] As a preferred technical solution of the present invention, the barrier portion includes a screw, a barrier plate and a stirring protrusion. A screw threadedly connected to the screw barrel is slidably installed on the second pillar, the screw passes through the through hole and is movably connected to the through hole, a barrier plate located in the rotating barrel is fixedly installed at the rear end of the screw, and a plurality of stirring protrusions are fixedly installed on the rear end surface of the barrier plate in a circular array.

[0013] As a preferred technical solution of the present invention, the bearing part includes a supporting slide bar, a connecting cross plate, a semi-arc guide plate, a material removal baffle and a guide groove, a supporting slide bar located directly below the rotating drum and inclined in the same manner as the rotating drum is fixedly installed between the first pillar and the second pillar, a sliding cavity is provided inside the supporting slide bar, a connecting cross plate is fixedly installed at one end of the supporting slide bar close to the first pillar, a semi-arc guide plate coaxial with the supporting slide bar is fixedly installed on the front end surface of the connecting cross plate, a left-right symmetrical material removal baffle is fixedly installed on the upper end surface of the semi-arc guide plate, and a spiral guide groove is provided on the inner ring wall of the semi-arc guide plate.

[0014] As a preferred technical solution of the present invention, the connecting part includes a connecting plate, a limiting slide, a sliding block and a connecting rod. A limiting slide is provided on the outer ring wall of the supporting sliding rod, a sliding block is slidably installed in the limiting slide, a connecting rod located in the sliding cavity is fixedly installed at the front end of the sliding block, and a connecting plate is fixedly installed together with the front end of the connecting rod and the screw rod.

[0015] As a preferred technical solution of the present invention, the collecting part includes a collecting cylinder, a feed trough, an axial sleeve, a circular partition, a dividing plate, a fixed sleeve and a guide rod. The rear end of the slider is fixedly installed with a collecting cylinder slidably connected to the supporting slide rod, a fan-shaped feed trough is opened at the upper end of the collecting cylinder, and an axial sleeve mounted on the supporting slide rod is installed inside the collecting cylinder through a bearing. The rear end of the axial sleeve is fixedly provided with a circular partition, and a plurality of dividing plates are fixedly installed on the outer ring wall of the axial sleeve in a circular array. A fixed sleeve is fixedly installed on the rear end face of the circular partition, and a guide rod slidably connected to the guide groove is fixedly installed on the outer ring wall of the fixed sleeve. The front end face of the collecting cylinder is provided with a discharge port corresponding to adjacent dividing plates one by one.

[0016] As a preferred technical solution of the present invention, the impurity removal mechanism includes a bellows and a wind plate, the left end surfaces of the first pillar and the second pillar are jointly fixedly mounted with a bellows located between the collecting cylinder and the rotating cylinder, and the right end surface of the bellows is fixedly mounted with a wind plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The grading and screening device for processing melon seeds and roasted nuts, through the coordinated use of the screening mechanism, the collecting mechanism and the impurity removal mechanism, adopts an integrated operation model of screening, impurity removal and collection, completes the single-barrel multi-stage screening of melon seeds and roasted nuts and the separate collection of melon seeds of different sizes, and removes impurities from the melon seeds by wind during their falling process, integrates multi-stage screening and impurity removal functions, improves screening efficiency, reduces the space occupied by equipment, optimizes the layout of the production workshop, and at the same time, collects melon seeds of different sizes separately in real time to avoid mixing, improves classification accuracy, and synchronous screening and collection reduces the residence time of melon seeds on the production line, improves the overall production efficiency, and optimizes the subsequent processing flow.

[0018] 2. The grading and screening device for processing melon seeds and roasted nuts uses a single barrel to complete multi-stage screening of melon seeds and roasted nuts through the coordinated use of the screening mechanism and the impurity removal mechanism, which reduces the complexity of the equipment, is more convenient for operation and maintenance, saves production space, and optimizes the screening process. In addition, a rubber brush is inserted into the sieve holes to push the melon seeds stuck in the sieve holes into the sieve drum, so that the sieve holes are cleaned in time to reduce blockage during the screening process, thereby ensuring the screening effect and improving the quality of the final product.

[0019] 3. The grading and screening device for processing roasted melon seeds and nuts, through the coordinated use of the screening mechanism and the collecting mechanism, can collect melon seeds of different sizes separately in the process of multi-stage screening following the screening process, so that screening and collection can be carried out simultaneously, simplifying the production process, improving operating efficiency, and collecting melon seeds of different sizes separately in real time to avoid mixing, improve classification accuracy, optimize subsequent processing flow, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when it is working.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the screening mechanism of the present invention.

[0022] Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the screening mechanism of the present invention.

[0023] Figure 4 It is a partial three-dimensional structural schematic diagram of the collecting mechanism and the impurity removing mechanism of the present invention.

[0024] Figure 5 It is a partial three-dimensional structural schematic diagram of the collecting mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the matching structure of the bearing part and the collecting part of the present invention.

[0026] Figure 7 It is a schematic diagram of a partially cutaway three-dimensional structure of the collecting part of the present invention.

[0027] In the figure: 1, base; 2, first pillar; 3, second pillar; 4, screening mechanism; 41, support part; 411, support; 412, first shaft column; 413, rotating drum; 414, second shaft column; 42, driving part; 421, first gear; 422, first fixing plate; 423, first motor; 43, screening part; 431, sieve hole; 432, brush plate; 44, matching part; 441, second fixing plate; 442, bearing seat; 443, screw drum; 444, second motor; 45, blocking part; 451, screw rod; 452, blocking plate; 45 3. Stirring bump; 5. Collecting mechanism; 51. Bearing part; 511. Supporting slide bar; 512. Connecting cross plate; 513. Semi-arc guide plate; 514. Unloading partition plate; 515. Guide groove; 52. Connecting part; 521. Connecting plate; 522. Limiting slideway; 523. Sliding block; 524. Connecting rod; 53. Collecting part; 531. Collecting barrel; 532. Feeding trough; 533. Axial sliding sleeve; 534. Circular partition plate; 535. Dividing plate; 536. Fixed sleeve; 537. Guide rod; 6. De-impurity mechanism; 601. Bellows; 602. Wind plate. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1 A grading and screening device for processing melon seeds and roasted nuts comprises a base 1, a first pillar 2 and a second pillar 3 located directly in front of the first pillar 2 are fixedly mounted on the upper end surface of the base 1, a screening mechanism 4 for screening melon seeds of different sizes using a single barrel is commonly arranged between the first pillar 2 and the second pillar 3; the screening mechanism 4 comprises a supporting portion 41 commonly arranged between the first pillar 2 and the second pillar 3 and used for rolling screening of the melon seeds, a driving portion 42 providing power for the supporting portion 41 is arranged on the first pillar 2, a screening portion 43 for screening and scraping the melon seeds is arranged on the supporting portion 41, a blocking portion 45 for blocking the melon seeds and cooperating with the driving portion 42 to stir the melon seeds is arranged on the supporting portion 41, and a matching portion 44 cooperating with the blocking portion 45 and used for driving the melon seeds to move to the corresponding screening position is arranged on the second pillar 3.

[0030] See also Figure 1A collecting mechanism 5 for cooperating with the screening mechanism 4 to collect melon seeds of corresponding sizes is provided between the first pillar 2 and the second pillar 3; the collecting mechanism 5 includes a bearing portion 51 provided between the first pillar 2 and the second pillar 3, the bearing portion 51 is provided with a connecting portion 52 for cooperating with the blocking portion 45 to adjust the collection position of melon seeds of different sizes, and the connecting portion 52 is provided with a collecting portion 53 cooperating with the bearing portion 51.

[0031] See also Figure 1 The first support 2 and the second support 3 are both provided with a cleaning mechanism 6 for removing impurities from the melon seeds by wind.

[0032] See also Figure 1 , Figure 2 and Figure 3 The support portion 41 includes a support 411, a first shaft column 412, a rotating drum 413 and a second shaft column 414. The support 411 is fixedly installed on the upper end of the first pillar 2, and the first shaft column 412 is installed on the front end surface of the support 411 through a bearing. The rotating drum 413 is fixedly installed on the front end of the first shaft column 412 through a set support rod. The rotating drum 413 is inclined, and a second shaft column 414 connected to the bearing of the second pillar 3 is fixedly installed at the center of the front end surface of the rotating drum 413. The rotating drum 413, the first shaft column 412 and the second shaft column 414 are coaxial, and a through hole is opened at the center of the second shaft column 414.

[0033] See also Figure 1 and Figure 2 The driving part 42 includes a first gear 421, a first fixed plate 422 and a first motor 423. The first gear 421 is fixedly sleeved on the outer ring wall of the first shaft column 412, the first fixed plate 422 is fixedly installed on the front end surface of the support 411, the first motor 423 is fixedly installed on the first fixed plate 422, and the output end of the first motor 423 is fixedly sleeved with a second gear meshingly connected to the first gear 421.

[0034] See also Figure 1 , Figure 2 and Figure 3 The screening part 43 includes a screen hole 431 and a brush plate 432. A plurality of screen holes 431 are formed in an array on the annular wall of the rotating drum 413. The apertures of the screen holes 431 are arranged from large to small from front to back. A brush plate 432 is fixedly installed between the upper ends of the first pillar 2 and the second pillar 3 through a supporting rod. A rubber brush arranged on the lower end surface of the brush plate 432 fits against the outer annular wall of the rotating drum 413.

[0035] See also Figure 1 , Figure 2 and Figure 3The mating part 44 includes a second fixed plate 441, a bearing seat 442, a screw barrel 443 and a second motor 444. The second fixed plate 441 is fixedly installed on the front end surface of the second pillar 3, and the bearing seat 442 is fixedly installed on the lower end surface of the second fixed plate 441. A screw barrel 443 coaxial with the second shaft column 414 is rotatably installed in the bearing seat 442. The second motor 444 is fixedly installed on the second fixed plate 441, and the output end of the second motor 444 is connected to the screw barrel 443 through a first transmission gear set.

[0036] See also Figure 1 , Figure 2 and Figure 3 The blocking portion 45 includes a screw 451, a blocking plate 452 and a stirring protrusion 453. The screw 451, which is threadedly connected to the screw barrel 443, is slidably installed on the second pillar 3. The screw 451 passes through the through hole and is movably connected to the through hole. A blocking plate 452 located in the rotating barrel 413 is fixedly installed at the rear end of the screw 451. A plurality of stirring protrusions 453 are fixedly installed on the rear end surface of the blocking plate 452 in a circular array.

[0037] During specific operation, when it is necessary to screen the melon seeds and roasted nuts, the melon seeds and roasted nuts to be screened are first poured into the rotating drum 413. At this time, the second motor 444 is in an unstarted state, and the blocking plate 452 is located at the rear end of the rotating drum 413. Due to the inclined setting of the rotating drum 413, the entering melon seeds slide downward until they are blocked by the blocking plate 452. Then, the second motor 444 is started to rotate the screw drum 443 through the first transmission gear set. Under the sliding cooperation between the screw 451 and the second pillar 3, the screw 451 drives the blocking plate 452 to move forward. After the blocking plate 452 moves to the front end of several small-aperture sieve holes 431 at the rear section of the rotating drum 413, the second motor 444 is stopped.

[0038] Then, the first motor 423 is started to rotate the first shaft column 412 through the first gear 421 and the second gear, and the drum 413 is rotated to make the melon seeds inside roll, and the melon seeds that meet the small-aperture sieve holes 431 will fall from the sieve holes 431 below under the action of gravity, so as to screen the small-sized melon seeds. During this process, the baffle plate 452 is in a stationary state, so the melon seeds will be continuously lifted and scattered by the stirring protrusions 453 when rolling, so that the melon seeds are fully stirred during the screening process to ensure the screening effect. When the drum 413 rotates until no melon seeds fall, the screening of small-sized melon seeds is completed.

[0039] Then, the second motor 444 is started again to move the baffle plate 452 to the front end of several medium-diameter sieve holes 431 in the middle section of the rotating drum 413, and then the medium-sized melon seeds are screened by rotating the rotating drum 413. After the screening of the medium-sized melon seeds is completed, the second motor 444 is started again to move the baffle plate 452 to the front end of several large-diameter sieve holes 431 in the front section, and the large-sized melon seeds are screened again by rotating the rotating drum 413. In this way, multi-stage screening of melon seeds and roasted nuts can be completed with a single barrel, which reduces the complexity of the equipment, makes it easier to operate and maintain, and saves production space.

[0040] During the rotation of the drum 413, the rubber brush on the brush plate 432 that is in contact with the drum 413 will extend into the sieve holes 431, pushing the melon seeds stuck in the sieve holes 431 into the drum 413, so as to clean the sieve holes 431 in time during the screening process, reduce blockage during the screening process, thereby ensuring the screening effect and improving the quality of the final product.

[0041] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The bearing portion 51 includes a supporting slide bar 511, a connecting cross plate 512, a semi-arc guide plate 513, a material discharge baffle 514 and a guide groove 515. A supporting slide bar 511 is fixedly installed between the first pillar 2 and the second pillar 3 and is located directly below the rotating drum 413 and is inclined in the same manner as the rotating drum 413. A sliding cavity is provided inside the supporting slide bar 511. A connecting cross plate 512 is fixedly installed at one end of the supporting slide bar 511 close to the first pillar 2. A semi-arc guide plate 513 coaxial with the supporting slide bar 511 is fixedly installed on the front end surface of the connecting cross plate 512. A left-right symmetrical material discharge baffle 514 is fixedly installed on the upper end surface of the semi-arc guide plate 513. A spiral guide groove 515 is provided on the inner ring wall of the semi-arc guide plate 513.

[0042] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The connecting part 52 includes a connecting plate 521, a limiting slide 522, a slider 523 and a connecting rod 524. The limiting slide 522 is penetrated through the outer ring wall of the supporting slide rod 511. The slider 523 is slidably installed in the limiting slide 522. The front end of the slider 523 is fixedly installed with a connecting rod 524 located in the sliding cavity. The connecting plate 521 is fixedly installed together with the front end of the connecting rod 524 and the screw 451.

[0043] See also Figure 1 , Figure 5 , Figure 6 and Figure 7The collecting part 53 includes a collecting barrel 531, a feeding trough 532, an axial sleeve 533, a circular partition 534, a dividing plate 535, a fixed sleeve 536 and a guide rod 537. The rear end of the slider 523 is fixedly installed with a collecting barrel 531 which is slidably connected to the supporting sliding rod 511. A fan-shaped feeding trough 532 is provided at the upper end of the collecting barrel 531. The inside of the collecting barrel 531 is installed with an axial sleeve 533 sleeved on the supporting sliding rod 511 through a bearing. The rear end of the axial sleeve 533 is fixedly sleeved with a circular partition 534. A plurality of dividing plates 535 are fixedly installed in a circular array on the outer ring wall of the axial sleeve 533. A fixing sleeve 536 is fixedly installed on the rear end surface of the circular partition 534. A guide rod 537 which is slidably connected to the guide groove 515 is fixedly installed on the outer ring wall of the fixing sleeve 536. A discharge port corresponding to the adjacent dividing plates 535 is provided on the front end surface of the collecting barrel 531.

[0044] During specific operation, before screening the small-sized melon seeds, while driving the baffle plate 452 to move, the screw 451 will drive the connecting rod 524 to move forward through the connecting plate 521, thereby pulling the collecting barrel 531 forward through the slider 523, and when the baffle plate 452 reaches the specified position, the collecting barrel 531 with the feeding trough 532 is just located below a number of small-aperture sieve holes 431, and the guide rod 537 is located at the rear end of the guide groove 515, and the guide rod 537 is in a horizontal rightward state at this time, and when the small-sized melon seeds are subsequently screened, the falling melon seeds will directly fall between the adjacent dividing plates 535, so as to collect the small-sized melon seeds.

[0045] In the process of moving the baffle plate 452 again to screen the medium-sized melon seeds, the collecting cylinder 531 is pulled forward and does not rotate, and the guide rod 537 will follow the guide groove 515 to move to a downward state, so that the axial sleeve 533 is rotated a certain angle through the fixing sleeve 536, so that the adjacent dividing plates 535 loaded with small-sized melon seeds are rotated into the collecting cylinder 531, and the small-sized melon seeds are blocked by the side walls of the collecting cylinder 531. When the baffle plate 452 reaches the specified position, the latter group of adjacent dividing plates 535 are rotated to the feed trough 532, and the feed trough 532 is now located directly below a number of medium-diameter sieve holes 431. When the medium-sized melon seeds are screened, the melon seeds fall directly between the two adjacent dividing plates 535 of this group, so that the medium-sized melon seeds are collected.

[0046] In the process of moving the baffle plate 452 to screen large-sized melon seeds, the guide rod 537 will follow the guide groove 515 to move to a horizontal left state, so that the adjacent dividing plates 535 loaded with medium-sized melon seeds rotate into the collecting cylinder 531, and when the baffle plate 452 reaches the specified position, the latter group of adjacent dividing plates 535 rotate to the feed trough 532 to collect large-sized melon seeds. In this way, in the process of multi-stage screening, melon seeds of different sizes are collected separately following the screening process, so that screening and collection can be carried out simultaneously, simplifying the production process, improving operating efficiency, and collecting melon seeds of different sizes separately in real time, which can avoid mixing of melon seeds of different sizes and improve classification accuracy. After the collection of melon seeds of all sizes is completed, the discharge ports are opened one by one to discharge melon seeds of different sizes.

[0047] See also Figure 1 and Figure 4 The impurity removal mechanism 6 includes a wind box 601 and a wind plate 602. The left end surfaces of the first pillar 2 and the second pillar 3 are fixedly installed with the wind box 601 located between the collecting cylinder 531 and the rotating cylinder 413, and the right end surface of the wind box 601 is fixedly installed with the wind plate 602.

[0048] During specific operation, when the screening mechanism 4 screens the melon seeds, the external air pump is started to supply air to the bellows 601 and blow it out through the wind plate 602. When the melon seeds of suitable size fall, the wind blown out by the wind plate 602 will blow out the light impurities inside them, thereby removing impurities from the melon seeds by wind force.

[0049] See also Figure 1 — Figure 7 Working principle: when it is necessary to screen the melon seeds and roasted nuts, first pour the melon seeds and roasted nuts to be screened into the rotating drum 413, and through the cooperation of the matching part 44 and the blocking part 45, the blocking plate 452 is moved to the front ends of several sieve holes 431 with different apertures in the rotating drum 413, and the driving part 42, the screening part 43 and the supporting part 41 cooperate to rotate the rotating drum 413, so as to complete the multi-stage screening of the melon seeds and roasted nuts through a single barrel, and in the process of the rotation of the rotating drum 413, the rubber brush pushes the melon seeds stuck in the sieve holes 431 into the rotating drum 413, so as to clean the sieve holes 431 in time and reduce the blockage in the screening process.

[0050] During the screening process of the screening mechanism 4, the collecting mechanism 5 will follow the screening process to collect melon seeds of different sizes separately, so that screening and collection can be carried out simultaneously. After the collection of melon seeds of all sizes is completed, the discharge ports are opened one by one to discharge melon seeds of different sizes.

[0051] When the screening mechanism 4 is screening the melon seeds, the external air pump is started to supply air to the bellows 601 and blow it out through the wind plate 602. When the melon seeds of suitable size fall, the wind blown out by the wind plate 602 will blow out the light impurities inside them, thereby removing impurities from the melon seeds by wind power.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grading and screening device for processing melon seeds and roasted nuts, comprising a base (1), characterized in that: A first support (2) and a second support (3) located directly in front of the first support (2) are fixedly mounted on the upper end surface of the base (1); a screening mechanism (4) for screening melon seeds of different sizes using a single barrel is provided between the first support (2) and the second support (3); The screening mechanism (4) comprises a support portion (41) which is arranged between the first support (2) and the second support (3) and is used for rolling screening of melon seeds; the first support (2) is provided with a driving portion (42) which provides power to the support portion (41); the support portion (41) is provided with a screening portion (43) which is used for screening and scraping the melon seeds; the support portion (41) is provided with a blocking portion (45) which is used for blocking the melon seeds and cooperating with the driving portion (42) to stir the melon seeds; and the second support (3) is provided with a matching portion (44) which cooperates with the blocking portion (45) and is used for driving the melon seeds to move to a corresponding screening position; A collecting mechanism (5) is provided between the first pillar (2) and the second pillar (3) for cooperating with the screening mechanism (4) to collect melon seeds of corresponding sizes; The collecting mechanism (5) comprises a bearing portion (51) disposed between the first pillar (2) and the second pillar (3); the bearing portion (51) is provided with a connecting portion (52) for cooperating with the blocking portion (45) to adjust the collecting position of melon seeds of different sizes; the connecting portion (52) is provided with a collecting portion (53) cooperating with the bearing portion (51); The first pillar (2) and the second pillar (3) are both provided with a cleaning mechanism (6) for cleaning the melon seeds with wind power; The connecting portion (52) comprises a connecting plate (521), a limiting slideway (522), a slider (523) and a connecting rod (524); the bearing portion (51) is provided with a limiting slideway (522); a slider (523) is slidably mounted in the limiting slideway (522); a connecting rod (524) located in the sliding cavity is fixedly mounted at the front end of the slider (523); and the connecting plate (521) is fixedly mounted on the connecting rod (524) and the blocking portion (45); The collecting part (53) comprises a collecting cylinder (531), a feeding trough (532), an axial sleeve (533), a circular partition (534), a material dividing plate (535), a fixing sleeve (536) and a guide rod (537). The collecting cylinder (531) is fixedly mounted at the rear end of the slider (523). A fan-shaped feeding trough (532) is provided at the upper end of the collecting cylinder (531). The axial sleeve (533) is mounted inside the collecting cylinder (531) via a bearing. 3), a circular partition plate (534) is provided at the rear end fixed sleeve of the axial sleeve (533), a plurality of dividing plates (535) are fixedly installed in a circular array on the outer ring wall of the axial sleeve (533), a fixed sleeve (536) is fixedly installed on the rear end face of the circular partition plate (534), a guide rod (537) is fixedly installed on the outer ring wall of the fixed sleeve (536), and a discharge port corresponding to the adjacent dividing plates (535) is provided on the front end face of the collecting cylinder (531).

2. A grading and screening device for processing melon seeds and roasted nuts according to claim 1, characterized in that: The support portion (41) comprises a support (411), a first shaft column (412), a rotating drum (413) and a second shaft column (414); the support (411) is fixedly mounted on the upper end of the first pillar (2); the first shaft column (412) is mounted on the front end surface of the support (411) via a bearing; the rotating drum (413) is fixedly mounted on the front end of the first shaft column (412) via a supporting rod; the rotating drum (413) is tilted; a second shaft column (414) connected to a bearing of the second pillar (3) is fixedly mounted at the center of the front end surface of the rotating drum (413); the rotating drum (413), the first shaft column (412) and the second shaft column (414) are coaxial; a through hole is opened at the center of the second shaft column (414).

3. A grading and screening device for processing melon seeds and roasted nuts according to claim 2, characterized in that: The driving part (42) comprises a first gear (421), a first fixing plate (422) and a first motor (423); the first gear (421) is fixedly sleeved on the outer ring wall of the first shaft column (412); the first fixing plate (422) is fixedly mounted on the front end surface of the support (411); the first motor (423) is fixedly mounted on the first fixing plate (422); and the output end of the first motor (423) is fixedly sleeved with a second gear meshingly connected to the first gear (421).

4. A grading and screening device for processing melon seeds and roasted nuts according to claim 2, characterized in that: The screening part (43) comprises a screen hole (431) and a brush plate (432); a plurality of screen holes (431) are formed through the annular wall of the rotating drum (413) in an array manner; the apertures of the screen holes (431) are arranged from large to small from front to back; a brush plate (432) is fixedly installed between the upper ends of the first support (2) and the second support (3) via a support rod; a rubber brush arranged on the lower end surface of the brush plate (432) is in contact with the outer annular wall of the rotating drum (413).

5. The grading and screening device for processing melon seeds and roasted nuts according to claim 2, characterized in that: The matching part (44) comprises a second fixed plate (441), a bearing seat (442), a screw barrel (443) and a second motor (444); the second fixed plate (441) is fixedly mounted on the front end surface of the second pillar (3); the bearing seat (442) is fixedly mounted on the lower end surface of the second fixed plate (441); a screw barrel (443) coaxial with the second shaft column (414) is rotatably mounted in the bearing seat (442); the second motor (444) is fixedly mounted on the second fixed plate (441); and the output end of the second motor (444) is transmission-connected to the screw barrel (443) via a first transmission gear set.

6. The grading and screening device for processing roasted melon seeds and nuts according to claim 2, characterized in that: The blocking portion (45) comprises a screw (451), a blocking plate (452) and a stirring protrusion (453); a screw (451) threadedly connected to the screw barrel (443) is slidably installed on the second pillar (3); the screw (451) passes through the through hole and is movably connected to the through hole; a blocking plate (452) located in the rotating barrel (413) is fixedly installed at the rear end of the screw (451); and a plurality of stirring protrusions (453) are fixedly installed on the rear end surface of the blocking plate (452) in a circumferential array.

7. A grading and screening device for processing roasted melon seeds according to claim 6, characterized in that: The bearing portion (51) comprises a supporting slide bar (511), a connecting cross plate (512), a semi-arc guide plate (513), a material removal baffle (514) and a guide groove (515); a supporting slide bar (511) located directly below the rotating drum (413) and inclined in the same manner as the rotating drum (413) is fixedly installed between the first pillar (2) and the second pillar (3); a sliding cavity is provided inside the supporting slide bar (511); a connecting cross plate (512) is fixedly installed at one end of the supporting slide bar (511) close to the first pillar (2); a semi-arc guide plate (513) coaxial with the supporting slide bar (511) is fixedly installed on the front end surface of the connecting cross plate (512); a left-right symmetrical material removal baffle (514) is fixedly installed on the upper end surface of the semi-arc guide plate (513); and a spiral guide groove (515) is provided on the inner ring wall of the semi-arc guide plate (513).

8. The grading and screening device for processing roasted melon seeds and nuts according to claim 7, characterized in that: The limiting slideway (522) is opened through the outer ring wall of the supporting slide rod (511), and the connecting plate (521) is fixedly installed between the connecting rod (524) and the front end of the screw rod (451).

9. A grading and screening device for processing roasted melon seeds according to claim 8, characterized in that: The collecting cylinder (531) is slidably connected to the supporting sliding rod (511), the axial sliding sleeve (533) is sleeved on the supporting sliding rod (511), and the guide rod (537) is slidably connected to the guide groove (515).

10. The grading and screening device for processing roasted melon seeds and nuts according to claim 9, characterized in that: The impurity removal mechanism (6) comprises a wind box (601) and a wind plate (602); the left end surfaces of the first support (2) and the second support (3) are jointly fixedly mounted with a wind box (601) located between the collecting cylinder (531) and the rotating cylinder (413); the right end surface of the wind box (601) is fixedly mounted with a wind plate (602).

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