Classification screening equipment for melon seed production

Abstract

The invention discloses graded screening equipment for melon seed production, and relates to the technical field of melon seed processing equipment, the graded screening equipment comprises a springing filter frame and a screening frame, the filter frame is distributed in an inclined state, the lower distribution end of the filter frame directly faces the upper side of the screening frame, and processed melon seeds fall into the screening frame after passing through the filter frame. The slow flow composition plate is arranged on the springing filter frame, the slow flow composition plate can slow down the falling speed of melon seeds, airflow sprayed by the air spraying head can make uniform and comprehensive contact with the melon seeds, the contact time of the melon seeds and the airflow sprayed by the air spraying head is prolonged, cleaning dead corners are reduced, and the cleaning effect is improved. The filtering frame in the springing state has an oscillation effect on melon seeds, the phenomenon that the melon seeds block filtering holes and adhere to the surface of the slow flow combination plate can be effectively avoided, smoothness of the surface of the filtering frame is guaranteed, the falling speed of impurities in the melon seeds is increased, and then the efficiency of melon seed impurity removal work is improved.

Description

Technical Field

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

[0002] During the growth process, melon seeds may be mixed with dust, soil, plant debris and other impurities. These impurities can be removed through screening to ensure that the melon seeds purchased by consumers are clean and hygienic without foreign matter. For example, if the melon seeds are mixed with small stones or metal debris, it will pose a threat to the health of consumers. After removing impurities, the melon seeds are of higher quality and taste better. The presence of impurities may affect the taste and flavor of melon seeds, such as earthy or other odors. After screening, purer melon seeds can be obtained, improving the eating experience of the product.

[0003] In the actual screening process, it is necessary to classify the melon seeds according to their size, shape, fullness and other characteristics, and the melon seeds can be divided into different grades and specifications. The melon seeds after screening are uniform in size, which is more conducive to subsequent processing steps, such as soaking, steaming, drying, etc. After screening, the consistency of processing effects can be guaranteed, and production efficiency and product quality can be improved.

[0004] The existing grading and screening equipment used for melon seeds needs to remove impurities in the melon seeds through a filter structure, and then perform grading and screening operations on the melon seeds. However, in the process of filtering and removing impurities and screening operations on melon seeds with a large output, the volume of the melon seeds to be processed is large, and the melon seeds are prone to clogging the filter structure during the filtration process, making it impossible to fully remove the impurities inside, which reduces the processing efficiency and easily leads to the phenomenon of residual impurities, which is further likely to affect the quality and screening efficiency of the melon seeds in subsequent grading and screening work. The present application provides a grading and screening equipment for melon seed production to meet the needs. Summary of the invention

[0005] In response to the above problems, the present application provides a grading and screening device for melon seed production.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a grading and screening device for melon seeds production, comprising a resilient filter rack and a screening rack, wherein the filter rack is distributed in an inclined state, and the lower end of the filter rack is directly opposite to the top of the screening rack, and the processed melon seeds pass through the filter rack and fall into the screening rack, and the screening rack separates the melon seeds that do not meet the production specifications from the processed melon seeds.

[0007] The filter frame is provided with two groups of slow-flow combination plates arranged along the frame direction, and a group of equally spaced jet heads are provided between the two groups of slow-flow combination plates. Impurities mixed in the melon seeds flowing on the filter frame can pass through the filter frame and fall down. When the filter frame and the slow-flow combination plates bounce synchronously, the jet heads swing synchronously.

[0008] Furthermore, the slow-flow combination plates include a plurality of groups of guide plate structures equidistantly distributed along the longitudinal distribution direction of the filter frame, and each group of guide plate structures is composed of a plurality of groups of symmetrical plates arranged along the inclination direction of the filter frame, wherein a first group of symmetrical plates distributed on the upper side is distributed in an eight-shaped shape, a second group of symmetrical plates distributed in an inverted eight-shaped shape is arranged in the relative space of the first group of symmetrical plates, a third group of symmetrical plates distributed in an eight-shaped shape is arranged directly below the second group of symmetrical plates, and the plate spacing of the third group of symmetrical plates is smaller than the plate spacing of the first group of symmetrical plates.

[0009] Furthermore, a frame is provided outside the filter frame, and guide blocks are provided on both sides of the filter frame, the frame is provided with a first guide sleeve that can accommodate the guide block to pass through, the end of the guide block exposed to the outside of the frame is provided with a top touch ball, and the top of the guide block is provided with a follower column extending above the first guide sleeve through the first guide sleeve, the top wall of the first guide sleeve is provided with a pressure spring connected to the guide block, and the pressure spring is coaxially distributed with the follower column.

[0010] The frame is provided with a rotatable second driving shaft and a second motor capable of controlling the rotation of the second driving shaft; the second driving shaft is provided with two driving cams respectively located below the top contact ball; rotatable guide plates are installed on both sides of the frame, and the guide plates are located between the driving cams and the top contact ball; as the driving cams rotate, the guide plates rotate synchronously until the top contact ball, the guide block and the filter frame bounce synchronously.

[0011] Furthermore, two second guide sleeves are symmetrically distributed on both sides of the filter frame at both ends of the frame, and two groups of guide columns are distributed from top to bottom on the filter frame. The guide columns extend through the second guide sleeves to the top of the filter frame. When the filter frame bounces, the guide columns move synchronously along the distribution direction of the second guide sleeves.

[0012] Furthermore, the jet head is connected via a conveying pipe, and the conveying pipe is installed on the frame via a bearing seat. A second driving wheel is provided on the second driving shaft, and a second driven wheel corresponding to the second driving wheel is provided on the conveying pipe. The second driven wheel is connected to the second driving wheel via a second synchronous belt. When the second driven wheel and the second driving wheel rotate with the reciprocating rotation of the driving cam, the conveying pipe rotates synchronously with the jet head.

[0013] Furthermore, a connecting bracket is provided on the frame, the screening frame is arranged on the connecting bracket, and the screening frame is in a downwardly distributed annular step structure.

[0014] Furthermore, a driving gear ring is provided outside the screening frame, a driving gear meshing with the driving gear ring is provided on one side of the driving gear ring, a first driving shaft rotating synchronously with the driving gear is provided on the driving gear, a protective frame capable of carrying the first driving shaft is provided outside the screening frame, and a first motor capable of driving the first driving shaft and the driving gear to rotate is provided on the protective frame.

[0015] Furthermore, a rotating rod coaxially distributed therewith is provided on the inner side of the screening frame, and a plurality of separation frames equidistantly distributed along a circular trajectory are provided on the rotating rod, and both ends of the rotating rod are respectively provided on the connecting support and the protective frame, and the rotating rod is provided with a first driven wheel that can rotate synchronously therewith, and a first driving wheel is provided on the first driving shaft, and the first driven wheel and the first driving wheel are connected by a first synchronous belt, and when the first driving wheel and the driving gear rotate synchronously, the separation frame and the screening frame rotate in opposite directions.

[0016] Furthermore, a collecting rack capable of receiving impurities is provided below the filter rack, a roller is provided at the bottom of the collecting rack, and a guide rail matched with the roller is provided on the inner side of the frame.

[0017] Furthermore, a collecting bucket for receiving melon seeds is provided below the screening rack, and the collecting bucket is located directly below the protective rack.

[0018] In summary, the technical effects and advantages of the present invention are as follows:

[0019] 1. The present invention is provided with a slow-flow combination plate on the elastic filter frame, which can slow down the falling speed of the melon seeds, so that the airflow ejected by the nozzle can contact the melon seeds evenly and comprehensively, increase the contact time between the melon seeds and the airflow ejected by the nozzle, reduce the cleaning dead angle, and improve the cleaning effect. The filter frame in the elastic state has a vibrating effect on the melon seeds, which can effectively prevent the melon seeds from clogging the filter holes and adhering to the surface of the slow-flow combination plate, ensure the unobstructed surface of the filter frame, increase the speed of impurities falling therein, and thus improve the efficiency of melon seed impurity removal.

[0020] 2. The present invention is provided with a conveying pipe that can swing synchronously with the bouncing of the filter frame, so that the nozzle head can change the angle to contact the melon seeds and blow off the impurities in the melon seeds, thereby expanding the cleaning range of the nozzle head and cleaning a larger area of ​​melon seeds on the surface of the filter frame, thereby comprehensively and quickly blowing off the impurities in the melon seeds and effectively reducing the residual impurities in the melon seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure from the second viewing angle of the present invention.

[0024] Figure 3 This is a schematic diagram of the connection between the filter frame and the frame of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0026] Figure 5 This is a schematic diagram of the connection between the filter frame and the frame from a second viewing angle of the present invention.

[0027] Figure 6 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0028] Figure 7 It is a schematic diagram of the connection between the screening rack and the separation rack of the present invention.

[0029] Figure 8 It is a schematic diagram of the screening frame structure of the present invention.

[0030] Fig. 9 This is a schematic diagram of the connection between the collection rack and the frame of the present invention.

[0031] In the figure: 1, filter frame; 11, slow flow combination plate; 12, jet head; 13, conveying pipeline; 14, guide block; 15, top touch ball; 16, follower column; 17, pressure spring; 18, guide column; 2, screening frame; 21, driving gear ring; 22, rotating rod; 23, separation frame; 24, driving gear; 25, first driving shaft; 26, first active rotor; 27, first driven rotor; 28, first synchronous belt; 29, first motor; 3, protective frame; 4, frame; 41, first guide sleeve; 42, second driving shaft; 43, driving cam; 44, guide plate; 45, second active rotor; 46, second driven rotor; 47, second synchronous belt; 48, second guide sleeve; 49, second motor; 5, connecting bracket; 6, collecting frame. DETAILED DESCRIPTION

[0032] 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.

[0033] Example 1: Reference Figure 1-6 The grading and screening equipment for melon seed production shown in the figure comprises a resilient filter frame 1 and a screening frame 2. The filter frame 1 is distributed in an inclined state, and the lower end of the filter frame 1 is directly opposite to the top of the screening frame 2. After passing through the filter frame 1, the processed melon seeds fall into the screening frame 2. The screening frame 2 separates the melon seeds that do not meet the production specifications from the processed melon seeds.

[0034] The filter frame 1 is provided with two groups of slow-flow combination plates 11 arranged along the frame direction, and a group of equidistantly distributed nozzles 12 are provided between the two groups of slow-flow combination plates 11. Impurities mixed in the melon seeds flowing on the filter frame 1 can pass through the filter frame 1 and fall down. The airflow ejected by the nozzles 12 can blow away the impurities in the melon seeds, causing the impurities to fall down, thereby improving the purity of the melon seeds and improving the quality of the melon seeds.

[0035] When the filter frame 1 and the slow-flow combination plate 11 bounce synchronously, the jet head 12 swings synchronously. During the bouncing process, the filter frame 1 has a vibrating effect on the melon seeds, increasing the speed at which impurities fall, thereby improving the efficiency of the melon seed impurity removal work. At the same time, during the swinging process, the jet head 12 expands the cleaning range and effectively reduces the residual impurities in the melon seeds.

[0036] Specifically, Figure 3 , Figure 4 As shown, the slow-flow combination plate 11 includes a plurality of groups of guide plate body structures equidistantly distributed along the longitudinal distribution direction of the filter frame 1, and each group of guide plate body structures is composed of a plurality of groups of symmetrical plate bodies arranged along the inclined direction of the filter frame 1, wherein the first group of symmetrical plate bodies distributed on the upper side are distributed in an eight-shaped shape, and a second group of symmetrical plate bodies distributed in an inverted eight-shaped shape are arranged in the relative space of the first group of symmetrical plate bodies, and a third group of symmetrical plate bodies distributed in an eight-shaped shape are arranged directly below the second group of symmetrical plate bodies, and the plate body spacing of the third group of symmetrical plate bodies is smaller than the plate body spacing of the first group of symmetrical plate bodies.

[0037] When the melon seeds pass through the slow flow assembly plate 11, the first group of symmetrical plates can divert the melon seeds, so that a part of the melon seeds can slide down along the surface of the figure-eight plate, and a part of the melon seeds are located in the relative space and fall. The melon seeds located in the relative space and falling can contact the second group of symmetrical plates. The second group of symmetrical plates reduces the secondary diversion, so that a part of the melon seeds slide down along the surface of the inverted figure-eight plate, and a part of the melon seeds continue to contact the third group of symmetrical plates. The third group of symmetrical plates will further divert the melon seeds, and the diverted melon seeds fall along the surface of the filter frame 1. During the falling process of the melon seeds, the airflow sprayed by the nozzle 12 contacts the melon seeds.

[0038] Based on the above operation, the falling speed of the melon seeds can be slowed down, so that the airflow sprayed by the nozzle 12 can contact the melon seeds evenly and comprehensively, increasing the contact time between the melon seeds and the airflow sprayed by the nozzle 12, reducing cleaning dead corners and improving the cleaning effect.

[0039] Since there are two groups of slow-flow combination plates 11, after the melon seeds are impacted by the airflow of the nozzle 12 and the impurities inside are removed, they need to pass through the slow-flow combination plates 11 again before they can fall into the screening rack 2. In this process, the speed of the melon seeds falling can be further slowed down, so that the melon seeds can be fully cleaned on the surface of the filtering rack 1, further improving the cleaning effect of the cleaning work. At the same time, the slow-flow combination plates 11 distributed downward can also avoid the splashing phenomenon caused by the melon seeds falling, reducing the splashing loss of the melon seeds.

[0040] like Figure 5 , Figure 6 As shown, a frame 4 is provided outside the filter frame 1, and guide blocks 14 are provided on both sides of the filter frame 1, and a first guide sleeve 41 that can accommodate the guide block 14 is provided on the frame 4, and a top contact ball 15 is provided at one end of the guide block 14 exposed outside the frame 4, and a follower column 16 that passes through the first guide sleeve 41 and extends to the top of the guide block 14 is provided at the top end, and a pressure spring 17 connected to the guide block 14 is provided on the inner top wall of the first guide sleeve 41, and the pressure spring 17 is coaxially distributed with the follower column 16.

[0041] The frame 4 is provided with a rotatable second drive shaft 42 and a second motor 49 that can control the rotation of the second drive shaft 42. The second drive shaft 42 is provided with two drive cams 43 that are respectively located below the top contact ball 15. Rotatable guide plates 44 are installed on both sides of the frame 4. The guide plates 44 are located between the drive cams 43 and the top contact ball 15. As the drive cam 43 rotates, its convex portion squeezes the guide plate 44 to rotate synchronously. Under the squeezing action of the guide plate 44, the top contact ball 15, the guide block 14 and the filter frame 1 can be raised. As the drive cam 43 rotates continuously, when its convex portion rotates away from the guide plate 44, the top contact ball 15, the guide block 14 and the filter frame 1 can be lowered to the initial position under the elastic potential energy of the pressure spring 17.

[0042] Therefore, with the continuous rotation of the driving cam 43, the filter frame 1 can be continuously bounced. During the bouncing process, the melon seeds are shaken, which can effectively prevent the melon seeds from clogging the filter holes and sticking to the surface of the slow-flow combination plate 11, thereby ensuring the smoothness of the surface of the filter frame 1 and increasing the speed at which impurities fall, thereby improving the efficiency of the melon seed removal work.

[0043] like Figure 5 As shown, two ends of the frame 4 are provided with two second guide sleeves 48 symmetrically distributed on both sides of the filter frame 1, and the filter frame 1 is provided with two groups of guide columns 18 distributed from top to bottom. The guide columns 18 pass through the second guide sleeves 48 and extend above them. When the filter frame 1 bounces, the guide columns 18 move synchronously along the distribution direction of the second guide sleeves 48.

[0044] The combination of the guide column 18 and the second guide sleeve 48 ensures the bearing strength of the frame 4 on the filter frame 1, while preventing the filter frame 1 from deflecting during motion, thereby improving the stability of the filter frame 1 during the bouncing process.

[0045] like Figure 5 , Figure 6 As shown, the nozzle 12 is connected through a conveying pipe 13, and the conveying pipe 13 is installed on the frame 4 through a bearing seat. A second driving wheel 45 is provided on the second driving shaft 42, and a second driven wheel 46 corresponding to the second driving wheel 45 is provided on the conveying pipe 13. The second driven wheel 46 is connected to the second driving wheel 45 through a second synchronous belt 47. When the second driven wheel 46 and the second driving wheel 45 rotate with the reciprocating rotation of the driving cam 43, the conveying pipe 13 and the nozzle 12 rotate synchronously.

[0046] During the rotation of the delivery pipe 13 and the nozzle 12, the nozzle 12 can change its angle to contact the melon seeds, blow off the impurities in the melon seeds, and expand the cleaning range of the nozzle 12. In this process, the airflow contacts the melon seeds in a larger range, and a larger area of ​​melon seeds can be cleaned on the surface of the filter frame 1, thereby comprehensively and quickly blowing off the impurities in the melon seeds, effectively reducing the residual impurities in the melon seeds.

[0047] Embodiment 2: Based on embodiment 1, Figure 7 , Figure 8 As shown, a connection bracket 5 is provided on the frame 4, and the screening frame 2 is provided on the connection bracket 5, and the screening frame 2 is in a downwardly distributed annular step structure. Compared with the screening frame arranged in a plane, the setting of the annular step structure can make it difficult for all the sieve holes in the screening frame 2 to be blocked, and there is always space for the melon seeds to fall, which effectively avoids the phenomenon that the falling and accumulated melon seeds block the screening frame 2, and improves the smoothness of the melon seeds falling process.

[0048] A driving gear ring 21 is provided outside the screening frame 2, and a driving gear 24 meshing with the driving gear ring 21 is provided on one side thereof, and a first driving shaft 25 rotating synchronously therewith is provided on the driving gear 24. A protective frame 3 capable of carrying the first driving shaft 25 is provided outside the screening frame 2, and a first motor 29 capable of driving the first driving shaft 25 and the driving gear 24 to rotate is provided on the protective frame 3.

[0049] When the first motor 29 drives the first drive shaft 25 and the drive gear 24 to rotate, the meshing force between the drive gear 24 and the drive gear ring 21 can cause the screening rack 2 to rotate, thereby increasing the flow rate of the melon seeds inside the screening rack 2 and preventing the falling melon seeds from being concentrated on the part of the screening rack 2 close to the filter rack 1. Combined with the special structure of the screening rack 2, the speed at which the melon seeds are screened and fall is further increased, thereby improving the efficiency of the melon seed screening work.

[0050] like Figure 7 , Figure 8 As shown, a rotating rod 22 coaxially distributed therewith is provided inside the screening frame 2, and a plurality of separating frames 23 equidistantly distributed along a circumferential track are provided on the rotating rod 22, and both ends of the rotating rod 22 are respectively provided on the connecting bracket 5 and the protective frame 3, and a first driven rotating wheel 27 which can rotate synchronously therewith is provided on the rotating rod 22, and a first driving rotating wheel 26 is provided on the first driving shaft 25, and the first driven rotating wheel 27 and the first driving rotating wheel 26 are connected by a first synchronous belt 28. Therefore, when the first motor 29 drives the first driving rotating wheel 26 and the driving gear 24 to rotate synchronously and in the same direction, the screening frame 2 rotates in opposite directions to the driving gear 24, and the separating frame 23 rotates in the same direction as the first driving rotating wheel 26, so as to achieve the purpose of making the separating frame 23 and the screening frame 2 rotate in opposite directions.

[0051] Therefore, during the rotation of the screening rack 2, the separation rack 23 can quickly disperse the accumulated melon seeds inside the screening rack 2, so that the melon seeds are transferred to different positions and are close to the sieve holes at different positions, further improving the speed at which the melon seeds that do not meet the specifications are screened and fall. This is suitable for large-scale melon seed screening work and improves the screening efficiency of melon seeds.

[0052] like Fig. 9 As shown, in order to centrally collect the impurities filtered by the filter frame 1, a collection frame 6 for receiving impurities is provided below the filter frame 1, a roller is provided at the bottom of the collection frame 6, and a guide rail adapted to the roller is provided on the inner side of the frame 4. By pulling out the collection frame 6, the impurities inside it can be centrally cleaned.

[0053] Furthermore, in order to centrally collect the melon seeds that do not meet the specifications screened out by the screening rack 2, a collection bucket that can receive the melon seeds is provided below the screening rack 2, and the collection bucket is located directly below the protective rack 3.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. 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 melon seed production, characterized in that: The invention comprises an elastic filtering frame (1) and a screening frame (2), wherein the filtering frame (1) is arranged in an inclined state, and one end of the filtering frame (1) which is arranged at the bottom is directly opposite to the top of the screening frame (2); after the processed melon seeds pass through the filtering frame (1), they fall into the inside of the screening frame (2); and the screening frame (2) separates the melon seeds which do not meet the production specifications from the processed melon seeds; The filter frame (1) is provided with two groups of slow-flow assembly plates (11) arranged along the frame body direction, and a group of equally spaced jet heads (12) is provided between the two groups of slow-flow assembly plates (11). Impurities mixed in the melon seeds flowing on the filter frame (1) can pass through the filter frame (1) and fall down. When the filter frame (1) and the slow-flow assembly plates (11) are synchronously resilient, the jet heads (12) are synchronously swung.

2. The grading and screening equipment for melon seed production according to claim 1, characterized in that: The slow-flow combination plates (11) each comprise a plurality of groups of guide plate structures equidistantly distributed along the longitudinal distribution direction of the filter frame (1), each group of guide plate structures being composed of a plurality of groups of symmetrical plates arranged along the inclined direction of the filter frame (1), wherein a first group of symmetrical plates distributed upwards are distributed in an eight-shaped pattern, a second group of symmetrical plates distributed in an inverted eight-shaped pattern is arranged in the relative space of the first group of symmetrical plates, a third group of symmetrical plates distributed in an eight-shaped pattern is arranged directly below the second group of symmetrical plates, and the plate spacing of the third group of symmetrical plates is smaller than the plate spacing of the first group of symmetrical plates.

3. The grading and screening equipment for melon seed production according to claim 2, characterized in that: The filter frame (1) is provided with a frame (4) outside, and guide blocks (14) are provided on both sides of the filter frame (1); the frame (4) is provided with a first guide sleeve (41) capable of accommodating the guide block (14) to pass through; the end of the guide block (14) exposed outside the frame (4) is provided with a top contact ball (15); the top end of the guide block (14) is provided with a follower column (16) passing through the first guide sleeve (41) and extending to the top of the guide block (14); the inner top wall of the first guide sleeve (41) is provided with a pressure spring (17) connected to the guide block (14); the pressure spring (17) and the follower column (16) are coaxially distributed; The frame (4) is provided with a rotatable second drive shaft (42) and a second motor (49) capable of controlling the rotation of the second drive shaft (42); the second drive shaft (42) is provided with two drive cams (43) respectively located below the top contact ball (15); rotatable guide plates (44) are installed on both sides of the frame (4); the guide plates (44) are located between the drive cams (43) and the top contact ball (15); as the drive cams (43) rotate, the guide plates (44) rotate synchronously until the top contact ball (15), the guide blocks (14) and the filter frame (1) are synchronously resilient.

4. The grading and screening equipment for melon seed production according to claim 3, characterized in that: Two second guide sleeves (48) are symmetrically distributed on both sides of the filter frame (1) at both ends of the frame (4); two groups of guide posts (18) are distributed from top to bottom on the filter frame (1); the guide posts (18) pass through the second guide sleeves (48) and extend above the second guide sleeves; when the filter frame (1) is resilient, the guide posts (18) move synchronously along the distribution direction of the second guide sleeves (48).

5. The grading and screening equipment for melon seed production according to claim 4, characterized in that: The nozzle (12) is connected via a conveying pipe (13), the conveying pipe (13) is mounted on the frame (4) via a bearing seat, a second driving wheel (45) is provided on the second driving shaft (42), a second driven wheel (46) corresponding to the second driving wheel (45) is provided on the conveying pipe (13), the second driven wheel (46) and the second driving wheel (45) are connected via a second synchronous belt (47), and when the second driven wheel (46) and the second driving wheel (45) rotate along with the reciprocating rotation of the driving cam (43), the conveying pipe (13) and the nozzle (12) rotate synchronously.

6. The grading and screening equipment for melon seed production according to claim 3, characterized in that: The frame (4) is provided with a connection bracket (5), the screening frame (2) is arranged on the connection bracket (5), and the screening frame (2) is in the form of a downwardly distributed annular step structure.

7. The grading and screening equipment for melon seed production according to claim 6, characterized in that: The screening frame (2) is provided with a driving gear ring (21) outside, and a driving gear (24) meshing with the driving gear ring (21) is provided on one side of the driving gear ring (21), and a first driving shaft (25) rotating synchronously with the driving gear (24) is provided on the driving gear (24), and a protective frame (3) capable of carrying the first driving shaft (25) is provided on the screening frame (2), and a first motor (29) capable of driving the first driving shaft (25) and the driving gear (24) to rotate is provided on the protective frame (3).

8. The grading and screening equipment for melon seed production according to claim 7, characterized in that: A rotating rod (22) coaxially arranged therewith is provided inside the screening frame (2), and a plurality of separation frames (23) equidistantly arranged along a circular track are provided on the rotating rod (22), and two ends of the rotating rod (22) are respectively arranged on the connecting bracket (5) and the protective frame (3), and a first driven rotating wheel (27) which can rotate synchronously with the rotating rod (22) is provided on the rotating rod (22), and a first driving rotating wheel (26) is provided on the first driving shaft (25), and the first driven rotating wheel (27) and the first driving rotating wheel (26) are connected by a first synchronous belt (28), and when the first driving rotating wheel (26) and the driving gear (24) rotate synchronously, the separation frame (23) and the screening frame (2) rotate in opposite directions.

9. The grading and screening equipment for melon seed production according to claim 3, characterized in that: A collecting frame (6) capable of receiving impurities is provided below the filter frame (1), a roller is provided at the bottom of the collecting frame (6), and a guide rail matching the roller is provided on the inner side of the frame (4).

10. The grading and screening equipment for melon seed production according to claim 7, characterized in that: A collection bucket capable of receiving melon seeds is provided below the screening frame (2), and the collection bucket is located directly below the protective frame (3).

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