Walnut screening device

Abstract

The invention discloses a walnut screening device which comprises a walnut size screening cavity, the interior of the walnut size screening cavity is movably connected with a connecting plate, the bottom end of the connecting plate is provided with a shifting flexible piece, the bottom end of the walnut size screening cavity is provided with a plurality of connecting frames, and the interior of each connecting frame is provided with a first screen. The bottom end of the connecting frame is connected with a conveying hopper, the bottom end of the conveying hopper is connected with the top end of a treatment cavity, and the interior of the front end of the treatment cavity is movably connected with a connecting frame. And the walnut size screening cavity is used for automatic screening, screening of various walnut sizes can be met, meanwhile, the connecting frame can be flexibly disassembled and assembled, the hole diameter of the first screening net arranged in the connecting frame can be replaced according to the use requirement, and therefore practicability and convenience are improved.

Description

Technical Field

[0001] The invention relates to the technical field of walnut processing, in particular to a walnut screening device. Background Art

[0002] Walnut, also known as walnut and Qiangtao, is a plant of the Juglandaceae family. It is known as the world's famous "four major dried fruits" along with almonds, cashews and hazelnuts. Walnut kernels are rich in nutrients, with 15-20 grams of protein per 100 grams, more fat, 10 grams of carbohydrates, and a variety of trace elements and minerals such as calcium, phosphorus, iron, and other trace elements and minerals necessary for the human body, as well as a variety of vitamins such as carotene and riboflavin. It is beneficial to the human body and is one of the nuts that are deeply loved by the people.

[0003] In the prior art, walnut screening devices often require multiple screenings to obtain walnuts of the required sizes during the walnut screening process, which leads to low efficiency in the walnut screening process. In addition, components such as the screen of the traditional walnut screening device are often unable to quickly adjust their screening size, which leads to limitations in the walnut screening operation.

[0004] After searching, it is found that a feed port anti-blocking device and a walnut screening device (publication number: CN117002880A) are disclosed in Chinese patent documents. The present invention relates to the field of food feed screening technology, and discloses a feed port anti-blocking device and a walnut screening device. The feed port anti-blocking device includes an oscillating device and a driving device. The oscillating device includes a swing rod and a knocking piece. The waist of the swing rod is connected to the upper hopper by a rotating shaft. The knocking piece is arranged at the lower end of the swing rod and is used to knock the outer wall of the upper hopper. The driving device can push the swing rod to rotate forward so that the knocking piece is away from the upper hopper. When the driving device is separated from the swing rod, the swing rod rotates in the opposite direction under the action of gravity, so that the knocking piece knocks the upper hopper. The upper hopper can be oscillated in a circular manner to loosen the walnuts that have a bridging phenomenon in the upper hopper, so that the walnuts can be discharged smoothly from the outlet to avoid clogging of the feed port. However, the following defects still exist:

[0005] Although the above-mentioned feed port anti-blocking device and walnut screening device can realize the cyclic oscillation of the feed hopper, and the walnuts with bridging phenomenon in the feed hopper can be shaken and loosened, so that the walnuts can be discharged smoothly from the outlet to avoid blockage of the feed port, there is still a problem that in the process of screening the walnuts, it is often necessary to screen multiple times to obtain walnuts of the required sizes, which leads to low efficiency in the walnut screening process, and the screen and other components of the traditional walnut screening device are often unable to quickly adjust their screening size, which leads to limitations in the walnut screening operation. Summary of the invention

[0006] The object of the present invention is to provide a walnut screening device to solve the problem that the walnut screening device in the prior art proposed in the above-mentioned background technology often needs to be screened multiple times in the process of screening walnuts to obtain walnuts of the required sizes, which leads to low efficiency in the walnut screening process, and the screen and other components of the traditional walnut screening device are often unable to quickly adjust their screening size, which leads to the problem of limitations in the walnut screening operation.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a walnut screening device, comprising a walnut size screening chamber, the interior of the walnut size screening chamber is movably connected with a connecting plate, and a flexible sheet for shifting is installed at the bottom end of the connecting plate, a plurality of connecting frames are installed at the bottom end of the walnut size screening chamber, a first screen is installed inside the connecting frames, and a transmission bucket is connected to the bottom end of the connecting frames, the bottom end of the transmission bucket is connected to the top of the processing chamber, a connecting frame is movably connected inside the front end of the processing chamber, and a processing box is installed inside the top of the connecting frame, a second screen is installed at the bottom end of the processing box, the bottom end of the processing chamber is connected with a bellows, and the bottom end of the bellows is connected with a feeding head, a connecting cover is installed on the outer wall of the bottom end of the feeding head, and an elastic constriction strip is installed at the bottom end of the connecting cover.

[0008] Preferably, a transmission screw is movably connected between the upper inner walls on both sides of the walnut size screening chamber, and one end of the transmission screw is transmission-connected to the output end of the motor. The motor is installed on the side wall of the walnut size screening chamber, and the outer side wall of the transmission screw is meshingly connected with a connecting screw sleeve, and the connecting screw sleeve is installed on the top of the connecting plate.

[0009] Preferably, a connecting ring is symmetrically installed on the top of the connecting plate, and the connecting ring is sleeved on the outer side wall of the guide column, and the guide column is symmetrically installed between the inner side walls of the walnut-sized screening cavity.

[0010] Preferably, the bottom end of the walnut-size screening cavity is symmetrically provided with snap-in cavities at equal intervals, and the inner top of the snap-in cavity is inlaid with an electromagnetic block, the bottom end of the electromagnetic block is magnetically attracted to the top of the magnetic snap-in block, and the magnetic snap-in blocks are symmetrically installed on the top of the connecting frame.

[0011] Preferably, guide slide grooves are provided on both inner walls of the processing chamber, and guide slide blocks are movably connected inside the guide slide grooves, and the guide slide blocks are symmetrically installed on both outer walls of the connected frames.

[0012] Preferably, both sides of the bottom end of the processing box respectively abut against the top of the resistance spring and the pressure sensor, the resistance spring is symmetrically installed on the top of the mounting plate, and a pressure sensor is installed on the top of the mounting plate and between the two resistance springs, and the mounting plate is symmetrically installed on the inner side wall of the connected frame.

[0013] Preferably, the top end of the walnut size screening chamber is connected to a first feed pipe, and the top end of the first feed pipe is connected to the bottom end of the second feed pipe, the inner side wall of the second feed pipe is symmetrically installed with connecting blocks, and a rotating chamber is symmetrically opened inside the connecting block, and the interior of the rotating chamber is movably connected with a rotating block, one end of the rotating block is connected to the outer side wall of the baffle, and the other end of the rotating block is connected to one end of the eddy current spring sheet.

[0014] Preferably, one side of the bottom end of the walnut size screening chamber is connected to the top end of the reflux chamber, the bottom end of the reflux chamber is connected to the input end of the transmission pump through a connecting pipe, and the output end of the transmission pump is connected to the interior of the first feed pipe through a connecting pipe.

[0015] Preferably, the top of the walnut-size screening chamber is connected to the bottom of the dust hood, and a first metal protective net is installed at the inner bottom of the dust hood, one end of the dust hood is connected to a transmission pipeline, and the other end of the transmission pipeline is connected to the top of the storage chamber, and the storage chamber is installed at the rear end of the walnut-size screening chamber.

[0016] Preferably, a storage box is inserted into the storage cavity, and a dust bag is installed at the bottom of the storage box. A second metal protective net is installed at the bottom of the storage cavity, and centrifugal fans are installed at equal intervals on the top of the second metal protective net.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. During use, the present invention can flexibly install and fix a connecting frame with a first screen fixed inside according to the required screening needs, and automatically perform screening through a walnut size screening chamber, which can meet the screening of various walnut sizes. At the same time, because the connecting frame can be flexibly disassembled and assembled, the aperture of the first screen set inside the connecting frame can be replaced according to the use requirements, which improves practicality and convenience.

[0019] 2. During use of the present invention, the walnuts screened by the first sieve will be transmitted to the interior of the processing chamber through the provided transmission bucket, and then subjected to a secondary screening through the provided second sieve. In this way, after the walnuts are screened in the corresponding processing chamber during use, they will be subjected to a secondary screening through the second sieve, and walnuts that meet the small size will continue to be discharged, while those that meet the large size will be stored in the interior of the processing box. In addition, the weight generated by the large-sized walnuts accumulated inside the processing box will generate pressure parameter data for the pressure sensor. When the pressure parameter data reaches the rated value, it will be interacted to the operating end, so that the operator can be reminded in time to discharge the walnuts accumulated inside the processing box. In this way, walnuts of several sizes can be screened through coarse screening and then fine screening.

[0020] 3. During use of the present invention, the baffle is set so that the walnuts to be screened are fed into the second feed pipe and accumulated on the top of the baffle. After the weight of the walnuts accumulated on the baffle reaches a certain weight, the baffle will move downward, and the accumulated walnuts will be transmitted to the walnut size screening chamber through the first feed pipe. This method feeds the walnuts into the walnut size screening chamber in sections, which can make the walnut screening effect inside the walnut size screening chamber better, avoid screening a large number of walnuts at one time, resulting in poor walnut screening effect, thus improving the practicability and convenience of the device.

[0021] 4. By setting up a centrifugal fan, during the walnut screening process in the walnut size screening chamber, the centrifugal fan outputs work and generates centrifugal force, so that the debris and dust generated in the walnut screening process are sucked in through the dust collecting hood, and transmitted to the storage chamber through the transmission pipeline, and stored in the storage box, which can effectively avoid excessive impurities generated in the walnut screening process, thereby improving the practicability and convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal parts structure of the walnut-size screening chamber of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the combined parts of the connecting frame, the first screen, the transmission bucket, the processing chamber, the bellows and the feed head in the present invention;

[0026] Figure 5 This is a schematic diagram of the exploded structure of the internal parts of the processing chamber in the present invention;

[0027] Figure 6 This is a schematic diagram of the internal parts structure of the second feeding pipe in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the combined parts of the connecting block, the rotating cavity, the rotating block, the baffle and the eddy current spring sheet in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the combined parts of the dust collecting hood, the transmission pipeline, the storage chamber, the storage box, the second metal protection net and the centrifugal fan in the present invention;

[0030] Fig. 9 For the present invention Figure 3 The A part in the figure is an enlarged schematic diagram of the parts structure.

[0031] In the figure: 1. Walnut size screening chamber; 2. Drive screw; 3. Motor; 4. Connecting screw sleeve; 5. Connecting plate; 6. Toggle flexible sheet; 7. Connecting ring; 8. Guide column; 9. Snap-on chamber; 10. Electromagnetic block; 11. Magnetic snap-on block; 12. Connecting frame; 13. First screen; 14. Transmission bucket; 15. Processing chamber; 16. Guide slide; 17. Guide slide block; 18. Connecting frame; 19. Processing box; 20. Second screen; 21. Resistance spring; 22. Pressure sensor; 23. , mounting plate; 24, bellows; 25, feed head; 26, connecting cover; 27, elastic strap; 28, first feed pipe; 29, second feed pipe; 30, connecting block; 31, rotating chamber; 32, rotating block; 33, baffle; 34, eddy current spring sheet; 35, reflux chamber; 36, transmission pump; 37, dust cover; 38, first metal protective net; 39, transmission pipeline; 40, storage chamber; 41, storage box; 42, dust bag; 43, second metal protective net; 44, centrifugal fan. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Example 1

[0034] See also Figure 1-9 The present invention provides a walnut screening device, including a walnut size screening chamber 1, a transmission screw 2 is movably connected between the upper inner walls on both sides of the walnut size screening chamber 1, one end of the transmission screw 2 is fixedly connected to the output end of the motor 3, and the outer wall of the transmission screw 2 is meshingly connected with a connecting screw sleeve 4, the connecting screw sleeve 4 is fixedly connected to the top of a connecting plate 5, and the top of the connecting plate 5 is symmetrically fixedly connected with a connecting ring 7 with the connecting screw sleeve 4 as the central axis, the connecting ring 7 is all sleeved on the outer wall of a guide column 8, and the guide column 8 is symmetrically fixedly connected between the inner walls of the walnut size screening chamber 1, and the bottom end of the connecting plate 5 is fixedly connected with a toggle flexible sheet 6.

[0035] By setting the screw transmission structure composed of the connecting screw sleeve 4 and the transmission screw 2, the motor 3 is driven to output the operation by powering on or connecting to the PLC and other programs during use, so that the transmission screw 2 is driven by the motor 3 to be forward or reverse, and then the connecting screw sleeve 4 drives the connecting plate 5 to move left and right inside the walnut size screening chamber 1, so that the connecting plate 5 cooperates with the flexible sheet 6 to move the inside of the walnut size screening chamber 1.

[0036] A plurality of connecting frames 12 are installed at the bottom end of the walnut-size screening chamber 1, and the top ends of the connecting frames 12 are symmetrically fixedly connected with magnetic card blocks 11, the top ends of the magnetic card blocks 11 are carded inside the bottom end of the card cavity 9, and the inner top ends of the card cavity 9 are inlaid with electromagnetic blocks 10 for magnetic attraction with the top ends of the magnetic card blocks 11.

[0037] By setting the magnetic snap-in block 11, when installing the connecting frame 12, the magnetic snap-in block 11 is snapped into the inside of the snap-in cavity 9, and then the electromagnetic block 10 is energized to magnetically limit the magnetic snap-in block 11, so that the connecting frame 12 can be magnetically limited and fixed. In this way, the connecting frame 12 can be flexibly disassembled and assembled during use, and the aperture of the first screen 13 set inside the connecting frame 12 can be replaced according to usage requirements.

[0038] A first sieve 13 is installed inside the connecting frame 12, and the aperture sizes of the first sieves 13 installed inside several connecting frames 12 are arranged from small to large from the left side to the right side of the walnut-sized screening chamber 1, and the bottom end of the connecting frame 12 is fixedly connected to a transmission bucket 14, and the bottom end of the transmission bucket 14 is fixedly connected to the top of the processing chamber 15, and the bottom end of the processing chamber 15 is fixedly connected to a discharge head 25 through a bellows 24, and the bottom end outer wall of the discharge head 25 is fixedly connected to a connecting cover 26 set with a flexible material structure, and the bottom end of the connecting cover 26 is fixedly connected to an elastic constriction strip 27 set with an elastic material structure.

[0039] Walnuts of different sizes are screened by the first sieve 13, and are transferred to the interior of the processing chamber 15 by the transfer bucket 14 for secondary screening. Meanwhile, the walnuts that have passed the secondary screening are discharged through the bellows 24 and the discharge head 25, and during the discharge process, the bellows 24 can be freely bent to match the storage container, and the elastic band strip 27 is provided to cover the outer wall of the feed port of the storage container, and the discharge head 25 is connected to the feed port of the storage container by the connecting cover 26, so as to avoid the walnuts from being scattered during the discharge process.

[0040] The inner walls on both sides of the processing chamber 15 are provided with guide grooves 16 with a "convex" structure, and the guide grooves 16 are internally movably connected with guide sliders 17 with a "convex" structure. The guide sliders 17 are symmetrically fixedly connected to the outer walls of the connecting frame 18 with a hollow structure. The inner walls on both sides of the connecting frame 18 are fixedly connected with mounting plates 23, and the top of the mounting plate 23 is symmetrically fixedly connected with a resistance spring 21. A pressure sensor 22 fixedly connected to the top of the mounting plate 23 is provided between the two resistance springs 21. The pressure sensor 22 and the top of the resistance spring 21 are in resistance with the bottom end of the processing box 19, and the second screen 20 is fixedly connected to the inner bottom of the processing box 19.

[0041] By setting up the second sieve 20, after the corresponding processing chamber 15 is processed during use, a second screening will be carried out through the second sieve 20, and walnuts that meet the small size will continue to be discharged, while those that meet the large size will be stored in the processing box 19. In addition, the weight generated by the large-sized walnuts accumulated inside the processing box 19 generates pressure parameter data for the pressure sensor 22. When the pressure parameter data reaches the rated value, it will be interacted to the operation end, so that the operator can be reminded in time to discharge the walnuts accumulated inside the processing box 19. In this way, walnuts of several sizes can be screened through coarse screening and then fine screening.

[0042] The top of the walnut size screening chamber 1 is fixedly connected to the first feed pipe 28, and the top of the first feed pipe 28 is fixedly connected to the bottom end of the second feed pipe 29, the inner upper diameter of the second feed pipe 29 is larger than the inner lower diameter of the second feed pipe 29, the inner wall of the second feed pipe 29 is symmetrically fixedly connected with a connecting block 30, and both sides of the connecting block 30 are provided with a rotating cavity 31 for rotating the rotating block 32, one end of the rotating block 32 is fixedly connected to the outer wall of the baffle 33, and the baffle 33 is a "concave" structure, and the end of the rotating block 32 away from the baffle 33 is fixedly connected to one end of the eddy current spring sheet 34.

[0043] By setting the baffle 33, the walnuts to be screened will be fed into the second feed pipe 29 and accumulated on the top of the baffle 33. After the weight of the walnuts accumulated on the baffle 33 reaches a certain weight, the baffle 33 will move downward, and the accumulated walnuts will be transmitted to the walnut size screening chamber 1 through the first feed pipe 28. At the same time, after the walnuts accumulated on the baffle 33 are fed into the first feed pipe 28, the eddy current spring sheet 34 will drive the rotating block 32 to reset, thereby resetting the baffle 33. Compared with the traditional feeding method, this method can feed the walnuts into the walnut size screening chamber 1 in sections, thereby making the walnut screening effect inside the walnut size screening chamber 1 better.

[0044] One end of the first feed pipe 28 is fixedly connected to the output end of the transmission pump 36 through a connecting pipe, and the transmission pump 36 is fixedly connected to the top of the walnut size screening chamber 1, and the input end of the transmission pump 36 is fixedly connected to the bottom end of the reflux chamber 35 through a connecting pipe, and the top of the reflux chamber 35 is fixedly connected to one side of the bottom end of the walnut size screening chamber 1.

[0045] By setting up the reflux chamber 35, during the operation of the walnut size screening chamber 1, when the unscreened walnuts are pushed to the side of the walnut size screening chamber 1 close to the reflux chamber 35, they will fall into the inside of the reflux chamber 35, and then be output through the transmission pump 36, and transmitted to the inside of the first feed pipe 28 through the connecting pipe, and then screened again, which can ensure that all walnuts are screened, thereby improving the screening efficiency.

[0046] A dust hood 37 is fixedly connected to the top of the walnut-size screening chamber 1, and a first metal protective net 38 is fixedly connected to the inner bottom end of the dust hood 37, one end of the dust hood 37 is connected to the top of the storage chamber 40 through a transmission pipeline 39, a storage box 41 is plugged into the interior of the storage chamber 40, and a dust bag 42 is fixedly connected to the interior of the storage box 41, a second metal protective net 43 is fixedly connected to the inner bottom end of the storage chamber 40, and a centrifugal fan 44 is fixedly connected to the top of the second metal protective net 43 at equal intervals.

[0047] By setting up the centrifugal fan 44, during the walnut screening process in the walnut size screening chamber 1, the centrifugal fan 44 outputs the work and generates centrifugal force, so that the debris and dust generated in the walnut screening process are sucked in through the dust collecting hood 37, and transmitted to the storage chamber 40 through the transmission pipeline 39, and stored in the storage box 41, which can effectively avoid excessive impurities generated in the walnut screening process, thereby improving the practicability and convenience of the device.

[0048] The specific use process of this embodiment is as follows:

[0049] First, the walnuts to be screened are fed into the walnut size screening chamber 1. After the walnuts to be screened are fed into the second feed pipe 29, they are accumulated on the top of the baffle 33. After the weight of the walnuts accumulated on the baffle 33 reaches a certain weight, the baffle 33 will move downward, so that the accumulated walnuts will be transmitted to the walnut size screening chamber 1 through the first feed pipe 28. At the same time, after the walnuts accumulated on the baffle 33 are fed into the first feed pipe 28, the eddy current spring sheet 34 will drive the rotating block 32 to reset, thereby resetting the baffle 33.

[0050] Secondly, the walnuts are preliminarily screened by the screw transmission structure formed by the connecting screw sleeve 4 and the transmission screw 2. In this way, the motor 3 is driven to output the operation by powering on or connecting to a program such as a PLC during use, so that the transmission screw 2 is driven forward or reversely by the motor 3, and then the connecting screw sleeve 4 is cooperated to drive the connecting plate 5 to move left and right inside the walnut size screening chamber 1, so that the connecting plate 5 cooperates with the flexible sheet 6 to move the inside of the walnut size screening chamber 1, and the walnuts of different sizes are screened through the first screen 13. At the same time, the centrifugal fan 44 is set, so that in the process of walnut screening in the walnut size screening chamber 1, the centrifugal fan 44 outputs the operation, and the centrifugal force generated is sucked in through the dust collecting cover 37, and transmitted to the inside of the storage chamber 40 through the transmission pipeline 39, and stored in the storage box 41;

[0051] Afterwards, by setting the magnetic clamping block 11, when installing the connection frame 12, the magnetic clamping block 11 is clamped to the inside of the clamping cavity 9, and then the electromagnetic block 10 is energized to magnetically limit the magnetic clamping block 11, so that the connection frame 12 can be magnetically limited and fixed. In this way, the connection frame 12 can be flexibly disassembled and assembled during use, and the aperture of the first screen 13 set inside the connection frame 12 can be changed according to the use requirements;

[0052] Then, the walnuts are transferred to the processing chamber 15 through the transmission bucket 14, and then screened twice. Meanwhile, the walnuts screened twice are discharged through the bellows 24 and the discharge head 25. During the discharge process, the bellows 24 can be freely bent to fit the storage container, and the elastic band strip 27 can cover the outer wall of the feed port of the storage container.

[0053] Furthermore, by providing the second screen 20, after the corresponding processing chamber 15 is processed during use, the walnuts will be screened again through the second screen 20, and the walnuts that meet the small size will continue to be discharged, while the walnuts that meet the large size will be stored in the processing box 19. In addition, the weight of the large-sized walnuts accumulated in the processing box 19 generates pressure parameter data for the pressure sensor 22. When the pressure parameter data reaches the rated value, it will be interacted to the operation end, so that the operator can be reminded in time to discharge the walnuts accumulated in the processing box 19.

[0054] Finally, by setting the reflux chamber 35, during the operation of the walnut size screening chamber 1, when the unscreened walnuts are pushed to the side of the walnut size screening chamber 1 close to the reflux chamber 35, they will fall into the inside of the reflux chamber 35, and then be output by the transmission pump 36, and then be transmitted to the inside of the first feed pipe 28 through the connecting pipe, and then screened again, so that a walnut screening device is used;

[0055] It should be noted that the present invention is a walnut screening device, and all of its components are universal standard parts or components known to those skilled in the art. Its structure and principle can be known to those skilled in the art through technical manuals or through conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted monitoring computers and power supplies, are connected through wires. The specific connection means should refer to the above-mentioned working principle, and the electrical connection is completed in the working order of each electrical component. The detailed connection means are well-known technologies in the art.

[0056] 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 walnut screening device, comprising a walnut size screening chamber (1), characterized in that: The walnut size screening chamber (1) is movably connected to a connecting plate (5) inside, and a flexible sheet (6) is installed at the bottom end of the connecting plate (5). A plurality of connecting frames (12) are installed at the bottom end of the walnut size screening chamber (1). A first screen (13) is installed inside each of the connecting frames (12). A transmission bucket (14) is connected to the bottom end of the connecting frame (12). The bottom end of the transmission bucket (14) is connected to the top end of the processing chamber (15). The processing chamber (15) The front end is movably connected to a connecting frame (18), and a processing box (19) is installed inside the top end of the connecting frame (18). The bottom end of the processing box (19) is installed with a second screen (20). The bottom end of the processing chamber (15) is connected to a bellows (24), and the bottom end of the bellows (24) is connected to a feed head (25). The outer wall of the bottom end of the feed head (25) is installed with a connecting cover (26), and the bottom end of the connecting cover (26) is installed with an elastic constriction strip (27).

2. A walnut screening device according to claim 1, characterized in that: A transmission screw (2) is movably connected between the upper inner walls on both sides of the walnut size screening chamber (1), and one end of the transmission screw (2) is transmission-connected to the output end of the motor (3), the motor (3) is mounted on the side wall of the walnut size screening chamber (1), and the outer side wall of the transmission screw (2) is meshingly connected with a connecting screw sleeve (4), and the connecting screw sleeve (4) is mounted on the top of the connecting plate (5).

3. A walnut screening device according to claim 1, characterized in that: A connecting ring (7) is symmetrically mounted on the top of the connecting plate (5), and the connecting ring (7) is sleeved on the outer side wall of the guide column (8), and the guide column (8) is symmetrically mounted between the inner side walls of the walnut-size screening cavity (1).

4. A walnut screening device according to claim 1, characterized in that: The bottom end of the walnut-size screening chamber (1) is provided with symmetrically spaced snap-fit ​​chambers (9), and the top ends of the snap-fit ​​chambers (9) are inlaid with electromagnetic blocks (10), the bottom ends of the electromagnetic blocks (10) are magnetically attracted to the top ends of the magnetic snap-fit ​​blocks (11), and the magnetic snap-fit ​​blocks (11) are symmetrically mounted on the top ends of the connecting frames (12).

5. A walnut screening device according to claim 1, characterized in that: The inner walls on both sides of the processing chamber (15) are provided with guide grooves (16), and the inside of the guide grooves (16) is movably connected with guide slide blocks (17), and the guide slide blocks (17) are symmetrically installed on the outer walls on both sides of the connected frame (18).

6. A walnut screening device according to claim 1, characterized in that: The two sides of the bottom end of the processing box (19) respectively contact with the top ends of the contact spring (21) and the pressure sensor (22); the contact spring (21) is symmetrically mounted on the top end of the mounting plate (23); and the pressure sensor (22) is mounted on the top end of the mounting plate (23) and between the two contact springs (21); the mounting plate (23) is symmetrically mounted on the inner side wall of the connected frame (18).

7. A walnut screening device according to claim 1, characterized in that: The top end of the walnut size screening chamber (1) is connected to a first feed pipe (28), and the top end of the first feed pipe (28) is connected to the bottom end of a second feed pipe (29). A connecting block (30) is symmetrically installed on the inner side wall of the second feed pipe (29), and a rotating chamber (31) is symmetrically opened inside the connecting block (30). A rotating block (32) is movably connected inside the rotating chamber (31), one end of the rotating block (32) is connected to the outer side wall of the baffle (33), and the other end of the rotating block (32) is connected to one end of an eddy current spring sheet (34).

8. A walnut screening device according to claim 1, characterized in that: One side of the bottom end of the walnut size screening chamber (1) is connected to the top end of the reflux chamber (35), the bottom end of the reflux chamber (35) is connected to the input end of the transmission pump (36) through a connecting pipe, and the output end of the transmission pump (36) is connected to the inside of the first feed pipe (28) through a connecting pipe.

9. A walnut screening device according to claim 1, characterized in that: The top end of the walnut size screening chamber (1) is connected to the bottom end of the dust collecting hood (37), and a first metal protective net (38) is installed at the inner bottom end of the dust collecting hood (37). One end of the dust collecting hood (37) is connected to a transmission pipeline (39), and the other end of the transmission pipeline (39) is connected to the top end of the storage chamber (40), and the storage chamber (40) is installed at the rear end of the walnut size screening chamber (1).

10. A walnut screening device according to claim 9, characterized in that: A storage box (41) is inserted into the storage cavity (40), and a dust bag (42) is installed at the bottom of the storage box (41). A second metal protection net (43) is installed at the bottom of the storage cavity (40), and centrifugal fans (44) are installed at equal intervals at the top of the second metal protection net (43).

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