Integrated double drum vibrating screen for grain processing production lines

Abstract

The invention discloses an integrated double-drum rotary vibrating screen applied to a grain processing production line, belonging to the technical field of grain screening and impurity removal. The scheme adopts a cleaning method of an integrated combination of a double-drum cleaning screen and a rotary vibrating screen, combining the advantages of the drum screen cleaning large impurities without clogging and the rotary vibrating screen for grading and selection, and improves the traditional drum screen by providing an inner screen cylinder and an outer screen cylinder which are arranged inside and outside. The inner screen cylinder is used for screening large impurities, and the grain is filtered out from a discharge hole and transported downward along the outer screen cylinder, while the interior of the outer screen cylinder is divided into a plurality of sorting spaces by a plurality of material passing components, and the material passing components are used for opening and closing the material passing port. On the one hand, the sorting time of each sorting space is extended, avoiding the disadvantage of the traditional drum screen's direct-through over-fast screening, and improving the impurity removal rate; on the other hand, the double-drum screen arranged inside and outside can perform synchronous and segmented independent sorting operations on impurities of various levels, and is suitable for continuous processing of the grain processing production line.

Description

Technical Field

[0001] The present invention relates to the technical field of grain screening and impurity removal, and more specifically, to an integrated double-drum rotary vibrating screen applied to a grain processing production line. Background Art

[0002] Raw grains entering the factory for processing need to be screened and removed of impurities. The impurities must be cleaned up to meet the requirements of the rice mill for raw grain processing. This raw grain sorting process is called primary raw grain cleaning. Most of the time, the grain is screened by a drum screening machine, which is an inclined straight-through type. The material slides down the drum for screening. During the rotation of the drum, the material often slides down too fast, which may cause some materials to enter the next screening link before they are thoroughly screened, resulting in incomplete screening and reduced screening efficiency.

[0003] After searching, the patent publication number CN207615207U discloses "A two-stage dust-removing grain machine", which is a combined dust-removing grain machine with a first screening body, a second screening body, a third screening body, a fourth screening body, a fifth screening body and a sixth screening body. It adopts windward dust removal and performs multiple filtering and screening of grains through two layers of drums and vibrating screens. Although it improves the screening effect of the grain machine to a certain extent; however, in order to grade and screen out different impurities, multiple screening bodies are set, and each screening body is for impurities of a specific size or a specific level, resulting in defects such as excessive equipment size and a long screening process.

[0004] To this end, we proposed an integrated double-drum vibrating screen for use in grain processing production lines to address the above issues. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing grain screening device needs to set up multiple screening bodies in order to improve the screening effect, which makes the screening equipment large and the screening process too long. Compared with the existing technology, an integrated double-drum rotary vibrating screen applied to the grain processing production line is provided.

[0006] The object of the present invention can be achieved by the following technical scheme: an integrated double-drum rotary vibrating screen applied to a grain processing production line comprises an outer screen drum which is rotatably driven and mounted on a frame and has a discharging end which is inclined downward, the feeding end of the outer screen drum is fixedly sleeved with an inner screen drum which is coaxially arranged with the outer screen drum and has a plurality of discharging holes on its lower end wall, and a feeding channel which runs through the end of the outer screen drum is fixed at the outer end of the inner screen drum, a slag discharging channel which runs through the outer screen drum is fixed at one side of the upper end of the inner screen drum, a plurality of sorting spaces are arranged inside the outer screen drum between the inner screen drum and the discharging end, and a screen hole 1, a screen hole 2 and a screen hole 3 which respectively correspond to the positions of the plurality of sorting spaces are opened on the bottom end wall of the outer screen drum;

[0007] A material passing assembly is fixedly installed between two adjacent sorting spaces, and the material passing assembly includes a connecting plate fixed on the inner wall of the outer sieve cylinder, a material passing opening is reserved between the bottom of the connecting plate and the inner bottom wall of the outer sieve cylinder, and a magnetic sealing piece adapted to the material passing opening is installed in the connecting plate.

[0008] A rotary vibrating screen is fixedly installed below the frame and is located at the bottom of the discharge end of the outer screen drum and is connected thereto. A plurality of discharge ports are distributed on the rotary vibrating screen, and a wind selection component is installed at each discharge port.

[0009] Furthermore, a discharge annular cavity is reserved between the inner sieve cylinder and the outer sieve cylinder, a feed hopper is provided on the feed channel, and a flexible feed pipe is connected to the feed hopper. The grain particles to be processed are quantitatively transported to the inner sieve cylinder through the flexible feed pipe, the feed hopper and the feed channel. The inner sieve cylinder and the outer sieve cylinder are flipped back and forth left and right, so that the grain particles are filtered out through the discharge hole, and larger impurities are screened in the inner sieve cylinder.

[0010] Furthermore, the aperture of the discharge hole is larger than the size of the grain particles, the apertures of the sieve hole 1, sieve hole 2 and sieve hole 3 are smaller than the size of the grain particles, and the apertures of the sieve hole 1, sieve hole 2 and sieve hole 3 increase successively.

[0011] Furthermore, driven gears are fixedly sleeved on the feed end and the discharge end of the outer screen drum, and transmission gears meshing with the driven gears are rotatably installed on the left and right directions of the upper end wall of the frame. A pair of transmission gears are fixedly connected by a rotating shaft, and a driving motor for rotationally driving the transmission gear is fixed on the outer end of the frame near the feed end of the outer screen drum, thereby realizing the coaxial reciprocating left and right rotation of the outer screen drum and the inner screen drum.

[0012] Furthermore, a movable groove for lifting and lowering the magnetic sealing piece is provided inside the connecting plate, and electromagnetic pieces for magnetically positioning the magnetic sealing piece are fixed on both sides of the top of the movable groove.

[0013] Furthermore, a plurality of guide rods are fixed to the upper end of the magnetic sealing piece, a plurality of guide holes matching the guide rods are opened at the top end of the movable groove, and a compression spring fixed between the magnetic sealing piece and the top wall of the movable groove is sleeved on the guide rod. When the electromagnetic piece is started, the magnetic sealing piece is placed at the bottom of the connecting plate and matched with the material passing port under the action of its gravity and the elasticity of the plurality of compression springs.

[0014] Furthermore, a slag box located at the bottom of the outer sieve and used for receiving impurities in multiple sorting spaces is fixed at the upper end of the outer sieve, and a plurality of rotating rings corresponding to the inner and outer positions of the material passing assembly are fixedly sleeved on the outer end wall of the outer sieve. The rotating rings are rotatably installed on the slag box. A plurality of slag troughs connected with the sorting spaces are provided on the slag box, and a plurality of slag discharge ports connected to the bottom of the slag trough and inclined downwardly are fixed at the outer end of one side of the slag box.

[0015] Optionally, the air separation component includes an air separation box fixed on the discharge port, the air separation box is provided with a dust discharge chamber and an air separation chamber which are interconnected on the left and right and open at the lower ends, and the air separation chamber is located below the discharge port and is connected thereto.

[0016] Optionally, the upper end of the air separation chamber is connected to the upper end of the dust outlet chamber through an opened filter slot, and a blow pipe extending into the air separation chamber and corresponding to the position of the filter slot is fixed to the outer end wall of the air separation box. A dust exhaust pipe is externally connected to the bottom end of the dust outlet chamber, and an air separation box with a blow pipe is directly added at the lower end of the discharge port.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) This scheme is to set up an inner sieve drum and an outer sieve drum with inner and outer outer arrangements. The inner sieve drum is provided with multiple discharge holes for screening impurities larger than grains. The grains are filtered out through the discharge holes and transported downward along the outer sieve drum. Multiple sorting spaces are arranged inside the outer sieve drum. Between adjacent sorting spaces, a material passing component for opening and closing the material passing port is installed. The sorting time of each sorting space can be set according to the actual screening situation and requirements. On the one hand, it is conducive to extending the sorting time of each sorting space, avoiding the disadvantage of the traditional drum screen's straight-through type of over-fast screening, and improving the impurity removal rate. On the other hand, the improved double drum screen can perform synchronous segmented sorting operations on impurities of various levels, reducing the equipment installation space, and is suitable for continuous processing of grain processing production lines;

[0019] (2) This solution adds an air separation component connected to the discharge port on the rotary vibrating screen, and uses the rotary vibrating screen to sort the grains into different grades and sizes after impurities are removed. Air separation is directly performed during the grain sorting and dropping process to remove dust and smaller light impurities, further improving the grain sorting and processing effect. There is no need to pass the graded grains one by one into the air separation system for processing, further reducing the equipment installation space and simplifying the work process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the external structure of the present invention from another viewing angle;

[0022] Figure 3 It is a structural schematic diagram of the outer screen drum of the present invention when it is separated from the frame;

[0023] Figure 4 It is a cross-sectional view of the junction between the outer screen drum and the frame of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the inner screen cylinder of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the present invention when the slag discharge channel on the inner screen drum is turned downward;

[0026] Figure 7 A cross-sectional view of a material passing component of the present invention;

[0027] Figure 8 A cross-sectional view of the outer screen cylinder of the present invention when one of the material passing components is opened;

[0028] Fig. 9 It is a side cross-sectional view of the junction between the material passing assembly and the slag discharge box of the present invention;

[0029] Fig.10 It is a structural schematic diagram of the joint of the rotary vibrating screen and the air selection component of the present invention;

[0030] Fig.11 It is a cross-sectional view of the air selection component of the present invention.

[0031] Description of the numbers in the figure:

[0032] 1. Outer sieve drum; 101. Sieve hole one; 102. Sieve hole two; 103. Sieve hole three; 2. Inner sieve drum; 201. Feed channel; 202. Slag discharge channel; 203. Discharge hole; 3. Feeding assembly; 31. Connecting plate; 32. Magnetic sealing plate; 33. Guide rod; 34. Compression spring; 35. Electromagnetic plate; 4. Slag discharge box; 401. Slag discharge port; 5. Driven gear; 6. Transmission gear; 7. Driving motor; 8. Dropping box; 9. Guide hopper; 10. Vibrating screen; 11. Discharge port; 12. Air separation box; 121. Air separation chamber; 122. Dust discharge chamber; 13. Dust discharge pipe; 14. Blowing pipe. DETAILED DESCRIPTION

[0033] The following will combine 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 the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0034] Example 1: The present invention discloses an integrated double-drum rotary vibrating screen for use in a grain processing production line. Figure 1-Figure 2 , including an outer screen drum 1 which is rotatably driven and installed on the frame and whose discharging end is inclined downward, a driven gear 5 is fixedly sleeved on the feeding end and the discharging end of the outer screen drum 1, and a transmission gear 6 which is meshed with the driven gear 5 is rotatably installed on the left and right directions of the upper end wall of the frame, a pair of transmission gears 6 are fixedly connected by a rotating shaft, and a driving motor 7 which rotationally drives the transmission gear 6 is fixed on the outer end part of the frame near the feeding end of the outer screen drum 1.

[0035] See also Figure 3-Figure 5 The feeding end of the outer sieve drum 1 is fixedly sleeved with an inner sieve drum 2 which is coaxially arranged with the outer sieve drum 1 and has a plurality of discharge holes 203 on the lower end wall. The aperture of the discharge holes 203 is larger than the size of the grain particles. A feeding channel 201 is fixedly provided at the outer end of the inner sieve drum 2 and penetrates to the outside of the end of the outer sieve drum 1. A slag discharge channel 202 is fixedly provided on one side of the upper end of the inner sieve drum 2 and penetrates to the outside of the outer sieve drum 1.

[0036] A discharge annular cavity is reserved between the inner sieve drum 2 and the outer sieve drum 1, a feed hopper is provided on the feed channel 201, and a flexible feed pipe is externally connected to the feed hopper. The grain particles to be processed are quantitatively transported to the inner sieve drum 2 through the flexible feed pipe, the feed hopper, and the feed channel 201. The driving motor 7 is used to drive the inner sieve drum 2 and the outer sieve drum 1 to flip back and forth synchronously. The grain particles are filtered out through the discharge hole 203 during the left and right shaking process in the inner sieve drum 2, and the grain is discharged into the outer sieve drum 1 for subsequent impurity removal treatment, while larger impurities are screened and retained in the inner sieve drum 2. The setting of the flexible feed pipe does not affect the continuous feeding operation during the process of the inner sieve drum 2 being appropriately tilted and flipped left and right, and the feeding is stopped after the preset feeding time.

[0037] After the preset sorting time is reached, please refer to Figure 6 , the slag discharge channel 202 is rotated downward with increasing amplitude, so that the discharge port of the slag discharge channel 202 faces downward, and the larger impurities in the inner screen drum 2 are discharged outward. In order to facilitate the rapid discharge of impurities, a flexible slag suction belt can be provided on the slag discharge channel 202, and the impurities in the inner screen drum 2 are sucked out by external force. The empty inner screen drum 2 is used for subsequent continuous feeding.

[0038] See also Figure 3-Figure 4A plurality of sorting spaces are arranged inside the outer sieve drum 1 between the inner sieve drum 2 and the discharge end. A sieve hole 101, a sieve hole 102 and a sieve hole 103 corresponding to the positions of the plurality of sorting spaces are arranged on the bottom end wall of the outer sieve drum 1. The apertures of the sieve holes 101, 102 and 103 are smaller than the size of the grain particles, and the apertures of the sieve holes 101, 102 and 103 are gradually increased. The grain discharged toward the discharge end of the outer sieve drum 1 is successively removed of impurities of different levels through the sieve holes 101, 102 and 103.

[0039] A slag box 4 located at the bottom of the outer sieve drum 1 and used for receiving impurities in multiple sorting spaces is fixed at the upper end of the outer sieve drum 1. A plurality of rotating rings corresponding to the inner and outer positions of the material passing component 3 are fixedly sleeved on the outer end wall of the outer sieve drum 1. The rotating rings are rotatably installed on the slag box 4. A plurality of slag troughs connected with the sorting spaces are opened on the slag box 4, and a plurality of slag discharge ports 401 connected to the bottom of the slag discharge trough and inclined downward at the outer end of one side of the slag box 4 are fixed. The plurality of slag discharge slots on the slag box 4 correspond to the positions of sieve hole 101, sieve hole 2 102, and sieve hole 3 103, respectively, and are used to collect impurities screened out in different sorting spaces and discharge them outward from the slag discharge port 401.

[0040] See also Figure 1-Figure 2 A vibrating screen 10 is fixedly installed at the bottom of the discharge end of the outer screen drum 1 and is connected with the vibrating screen 1. A plurality of discharge ports 11 are distributed on the vibrating screen 10. A blanking box 8 connected with the discharge end of the outer screen drum 1 is embedded at the end of the frame. A guide hopper 9 connected between the blanking box 8 and the vibrating screen 10 is fixed at the bottom of the frame. The cleaned grain is introduced into the vibrating screen 10 through the blanking box 8 and the guide hopper 9. The vibrating screen 10 is used to finely sort the cleaned grain into different grades and sizes.

[0041] Embodiment 2: Based on Embodiment 1, this embodiment improves the interior of the outer sieve drum 1, and a material passing assembly 3 is fixedly installed between two adjacent sorting spaces. The material passing assembly 3 is used to open and close the material passing port, so that each sorting space can be cleaned independently, as follows:

[0042] See also Figure 4 and Figure 7-Figure 9 A material passing assembly 3 is fixedly installed between two adjacent sorting spaces, and the material passing assembly 3 includes a connecting plate 31 fixed on the inner wall of the outer sieve cylinder 1, and a material passing port is reserved between the bottom of the connecting plate 31 and the inner bottom wall of the outer sieve cylinder 1. A magnetic blocking piece 32 adapted to the material passing port is installed in the connecting plate 31 for lifting and lowering. A movable groove for lifting and lowering the magnetic blocking piece 32 is opened inside the connecting plate 31, and electromagnetic pieces 35 for magnetically attracting and positioning the magnetic blocking piece 32 are fixed on both sides of the top of the movable groove;

[0043] A plurality of guide rods 33 are fixed to the upper end of the magnetic blocking piece 32, and a plurality of guide holes matching the guide rods 33 are provided at the top end of the movable groove. A compression spring 34 fixed between the magnetic blocking piece 32 and the top wall of the movable groove is sleeved on the guide rod 33. When the electromagnetic piece 35 is activated, the magnetic blocking piece 32 is placed at the bottom of the connection plate 31 and matched with the material passing port under the action of its gravity and the elasticity of the plurality of compression springs 34.

[0044] After the grain in the sorting space reaches the preset screening time, the electromagnetic sheet 35 is started and the magnetic attraction of the electromagnetic sheet 35 on the magnetic sealing sheet 32 ​​is used to make the magnetic sealing sheet 32 ​​move upward to expose the material passing port, thereby realizing the transportation of the grain in the upper sorting space to the lower sorting space. A material passing component 3 with an opening and closing function is added, and the sorting time of each sorting space can be set according to the actual screening situation and requirements, thereby avoiding the disadvantage of the traditional straight-through cylinder-type over-fast screening from top to bottom.

[0045] The process is as follows: the grains screened by the inner sieve drum 2 are first discharged into the sorting space corresponding to the position of the sieve hole 101, and smaller impurities are filtered out in the sorting space. After the preset sorting time is reached, the magnetic blocking piece 32 on the material passing component 3 arranged adjacent to the sorting space is opened to expose the material passing port, and the grains in the sorting space are transferred to the next sorting space along the inclined inner wall of the outer sieve drum 1, and larger impurities are screened out by the sieve hole 2 102;

[0046] In this way, during the grain transportation process, the next sorting space is ensured to be vacant. The independent impurity removal and sorting in sections can help to extend the sorting time of each sorting space and improve the impurity removal rate. In addition, only the inner and outer double drum screens are required to perform synchronous segmented sorting operations on impurities of various levels, thus reducing the equipment installation space and being suitable for continuous processing of grain processing production lines.

[0047] Embodiment 3: Based on Embodiment 1, this embodiment adds an air separation component located at the lower end of the discharge port 11 on the rotary vibrating screen 10, specifically:

[0048] See also Figure 10-11 The wind selection component includes a wind selection box 12 fixed on the discharge port 11, and the wind selection box 12 is provided with a dust discharge chamber 122 and a wind selection chamber 121 which are connected to each other on the left and right sides and are both opened at the lower ends. The wind selection chamber 121 is located below the discharge port 11 and is connected thereto;

[0049] The upper end of the air selection chamber 121 is connected to the upper end of the dust outlet chamber 122 through the filter slot. The outer end wall of the air selection box 12 is fixed with a blow pipe 14 extending into the air selection chamber 121 and corresponding to the position of the filter slot. The bottom end of the dust outlet chamber 122 is externally connected with a dust exhaust pipe 13. The air selection box 12 with the blow pipe 14 is directly added at the lower end of the discharge port 11. Grains of different sizes vibrated and screened by the rotary vibrating screen 10 fall through the discharge port 11.

[0050] During the falling process, air is blown into the air separation chamber 121 through the blowing pipe 14 to remove dust and smaller light impurities. Clean grains are discharged from the air separation chamber 121, and dust and smaller light impurities are introduced into the pulse dust removal box through the dust exhaust pipe 13 for subsequent dust removal. There is no need to pass the graded grains into the air separation system one by one for processing, which further reduces the equipment installation space and simplifies the work process.

[0051] In summary: This solution is a cleaning method that uses a double drum cleaning screen and a rotary vibrating screen as an integrated combination, combining the advantages of the drum screen cleaning large impurities without clogging and the rotary vibrating screen for grading and selection;

[0052] Specifically, an inner sieve drum 2 and an outer sieve drum 1 are arranged with inner and outer outer arrangements, a plurality of discharge holes 203 are opened on the inner sieve drum 2 for screening impurities larger than grains, the grains are filtered out through the discharge holes 203 and transported downward along the outer sieve drum 1, and a plurality of material passing components 3 are used to divide the interior of the outer sieve drum 1 into a plurality of sorting spaces, the material passing components 3 are located between adjacent sorting spaces for opening and closing the material passing ports, and the sorting time of the sorting space can be set according to the actual screening situation and requirements;

[0053] On the one hand, it avoids the disadvantage of the traditional top-to-bottom straight-through overly fast screening. By means of segmented independent impurity removal and sorting, it is beneficial to extend the sorting time of each sorting space and improve the impurity removal rate. On the other hand, the double drum screen structure arranged inside and outside can realize synchronous segmented sorting of impurities of various levels, thus reducing the equipment installation space and being suitable for continuous processing of grain processing production lines.

[0054] In addition, a wind separation component connected to the discharge port 11 is added to the rotary vibrating screen 10, and the rotary vibrating screen 10 is used to sort the cleaned grain into different grades and sizes. Wind separation is directly performed during the grain sorting and dropping process to remove dust and smaller light impurities, thereby further improving the grain sorting and processing effect.

[0055] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. An integrated double-drum rotary vibrating screen for use in a grain processing production line, comprising an outer screen drum (1) which is rotatably mounted on a frame and has a discharge end which is inclined downward, and is characterized in that: The feeding end of the outer sieve drum (1) is fixedly sleeved with an inner sieve drum (2) which is coaxially arranged with the outer sieve drum (1) and has a plurality of discharge holes (203) on its lower end wall, and the outer end of the inner sieve drum (2) is fixed with a feeding channel (201) which extends to the outside of the end of the outer sieve drum (1), and the upper end of the inner sieve drum (2) is fixed with a slag discharge channel (202) which extends to the outside of the outer sieve drum (1), and the inner part of the outer sieve drum (1) is provided with a plurality of sorting spaces located between the inner sieve drum (2) and the discharge end, and the bottom end wall of the outer sieve drum (1) is provided with a sieve hole 1 (101), a sieve hole 2 (102), and a sieve hole 3 (103) which respectively correspond to the positions of the plurality of sorting spaces; A discharge annular cavity is reserved between the inner sieve cylinder (2) and the outer sieve cylinder (1); a feed hopper is provided on the feed channel (201), and a flexible feed pipe is externally connected to the feed hopper; the aperture of the discharge hole (203) is larger than the size of the grain particles; the apertures of the sieve hole 1 (101), the sieve hole 2 (102), and the sieve hole 3 (103) are smaller than the size of the grain particles; and the apertures of the sieve hole 1 (101), the sieve hole 2 (102), and the sieve hole 3 (103) are gradually increased; A material passing assembly (3) is fixedly installed between two adjacent sorting spaces, and the material passing assembly (3) comprises a connecting plate (31) fixed on the inner wall of the outer sieve cylinder (1), a material passing opening is reserved between the bottom of the connecting plate (31) and the inner bottom wall of the outer sieve cylinder (1), and a magnetic sealing piece (32) adapted to the material passing opening is installed in the connecting plate (31) in a lifting manner; The connecting plate (31) is provided with a movable groove for lifting the magnetic blocking piece (32), and electromagnetic pieces (35) are fixed on both sides of the top of the movable groove. A plurality of guide rods (33) are fixed on the upper end of the magnetic blocking piece (32), and a plurality of guide holes matching the guide rods (33) are provided on the top of the movable groove. A compression spring (34) fixed between the magnetic blocking piece (32) and the top wall of the movable groove is sleeved on the guide rod (33); A slag discharge box (4) is fixed at the upper end of the outer sieve drum (1) and is located at the bottom end of the outer sieve drum (1) and is used to receive impurities in a plurality of sorting spaces; a plurality of rotating rings corresponding to the inner and outer positions of the material passing assembly (3) are fixedly sleeved on the outer end wall of the outer sieve drum (1); the rotating rings are rotatably mounted on the slag discharge box (4); a plurality of slag discharge grooves connected to the sorting spaces are provided on the slag discharge box (4); and a slag discharge port (401) arranged obliquely downward is externally connected to the bottom of the slag discharge groove; A rotary vibrating screen (10) is fixedly installed below the frame and is located at the bottom of the discharge end of the outer screen drum (1) and is in communication with the outer screen drum (1). A plurality of discharge ports (11) are distributed on the rotary vibrating screen (10), and a wind selection component is installed at each discharge port (11).

2. The integrated double-drum vibrating screen for food processing production line according to claim 1 is characterized in that: A driven gear (5) is fixedly sleeved on the feed end and the discharge end of the outer screen drum (1), and a transmission gear (6) meshing with the driven gear (5) is rotatably mounted on the left and right directions of the upper end wall of the frame, a pair of transmission gears (6) are fixedly connected via a rotating shaft, and a driving motor (7) for rotating the transmission gear (6) is fixed on the outer end of the frame near the feed end of the outer screen drum (1).

3. The integrated double-drum rotary vibrating screen for food processing production line according to claim 1 is characterized in that: The air separation component comprises an air separation box (12) fixed on the material discharge port (11), the air separation box (12) is provided with a dust discharge chamber (122) and an air separation chamber (121) which are connected to each other on the left and right and are both opened at the lower ends, and the air separation chamber (121) is connected to the lower side of the material discharge port (11).

4. The integrated double-drum rotary vibrating screen for food processing production line according to claim 3 is characterized in that: A blowing pipe (14) extending into the air separation chamber (121) is fixed to the outer end wall of the air separation box (12), and a dust exhaust pipe (13) is externally connected to the bottom end of the dust exhaust chamber (122).

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