Multi-module combined type grain vibration cleaning sieve

Abstract

The invention relates to the technical field of cleaning sieves, and discloses a multi-module combined grain vibration cleaning sieve which comprises a vibration platform, an angle-adjustable and vibratable sieve box is installed on the vibration platform, and the bottom of the sieve box communicates with a sieve discharge nozzle. A rotary frame driven by a first motor and a gear sleeve driven by a second motor are rotationally installed on the inner wall of the screening box, a driving gear ring is installed on the gear sleeve, a set of screening modules distributed in a circumferential array mode are installed on the rotary frame, and each screening module comprises a main winding roller, an auxiliary winding roller and two guide rollers which are rotationally installed between the inner surfaces of the rotary frame. And the main winding roller is in transmission connection with the driving gear ring through the differential module. The cleaning screen has a modular synchronous rotary cleaning mode and a single screen type flow control screening mode when working, the functionality and application scenes of the cleaning screen are effectively improved through implementation of the two modes, and the cleaning screen has the function of electrically switching the aperture of the screen holes when working, so that the application scenes of the cleaning screen are effectively increased.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning screens, and more specifically, to a multi-module combined type grain vibrating cleaning screen. Background Art

[0002] Before grain is stored in the warehouse, it needs to be cleaned to remove leaves, chaff, dust, shriveled grains and other debris in the grain, improve the cleanliness of the grain, improve the quality of the grain, facilitate the storage of the grain, avoid the grain from deteriorating due to debris, and ensure the shelf life of the grain. Existing grain cleaning devices usually use grain cleaning screens.

[0003] In the prior art, a patent document with publication number CN105880167A discloses a combined grain cleaning screen, including a frame, a feeding device, a screening body and a dust removal device. The screening body is a vibrating screen with an inclined device on the frame, a feeding port is provided on the upper part of the screening body, the feeding port is connected to the feeding device, an impurity outlet and a grain outlet are provided on the lower part of the screening body, and a dust removal device is provided on the grain outlet. The above-mentioned device utilizes a material balancing plate to make the grain entering the feeding device evenly dispersed to both sides along the diversion flow channel, so that the grain is evenly distributed on the vibrating screen, avoiding the accumulation of grain in a small area, and improving the screening efficiency. However, the above-mentioned screening device is not convenient for realizing both the rotary cleaning mode and the single-screen flow control screening mode when in use. At the same time, the above-mentioned cleaning screen is not convenient for rapid conversion of the sieve hole aperture, which leads to a relatively limited application scenario of the cleaning screen. Based on this, the present invention provides a multi-module combined grain vibration cleaning screen to solve the technical problems raised in the above-mentioned background technology. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a multi-module combined grain vibration cleaning screen. When working, the cleaning screen has both a modular synchronous rotation cleaning mode and a single screen flow control screening mode. Through the realization of the above dual modes, the functionality and applicable scenarios of the device are effectively improved. When working, the cleaning screen has an electric switching function of the sieve hole aperture, which effectively increases the applicable scenarios of the cleaning screen.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a multi-module combined grain vibration cleaning screen, comprising a vibration platform, a screen box with adjustable angle and vibrating function is installed on the vibration platform, a screen material discharge nozzle is connected to the bottom of the screen box, a rotating frame driven by a first motor and a gear sleeve driven by a second motor are rotatably installed on the inner wall of the screen box, an active gear ring is installed on the gear sleeve, and a group of screening modules distributed in a circumferential array are installed on the rotating frame;

[0006] The screening module comprises a main roller, an auxiliary roller and two guide rollers rotatably installed between the inner surfaces of the rotating frame, the main roller is connected to the driving gear ring through a differential module, a tensioning retainer is provided at the rotating connection between the auxiliary roller and the rotating frame, a screen is wound between the main roller and the auxiliary roller, the two guide rollers are both in contact with the screen, a group of screening areas are sequentially arranged on the screen, each of the screening areas is densely covered with screen holes, and the aperture of the screen holes on each screening area is different, an air cleaning module is installed on the top of the screen box, and a flow control and material diverting module is provided on the screen box and at a position corresponding to the inner side of the rotating frame.

[0007] As a preferred technical solution of the present invention, the vibration platform includes two symmetrically arranged shock-absorbing brackets, two symmetrically arranged connecting rods are installed between the two shock-absorbing brackets, an adjusting arm push rod is hinged between the two shock-absorbing brackets and the relative surfaces of the screen box, hinge shafts are fixedly installed on both side surfaces of the screen box, the two hinge shafts are respectively hinged to the two shock-absorbing brackets, a group of casters are installed on the bottom surfaces of the two shock-absorbing brackets, and two symmetrically arranged vibration motors are installed on the top surface of the screen box.

[0008] As a preferred technical solution of the present invention, the differential module includes a differential shaft and a main shaft rotatably connected to the rotating frame, a differential gear is installed on the differential shaft, a driven gear connected to the differential gear is installed on the main roller, the radius of the differential gear is 9 times to 4 times the radius of the driven gear, bevel gears are installed on the differential shaft and the main shaft, the two bevel gears are meshed with each other, a linkage gear is installed on the main shaft, and the linkage gear is connected to the driving ring gear.

[0009] As a preferred technical solution of the present invention, the tension retainer includes a tension shaft rotatably connected to the rotating frame, a chain belt is transmission-connected between the tension shaft and the auxiliary winding roller, and a torsion spring is provided at the rotating connection between the tension shaft and the rotating frame.

[0010] As a preferred technical solution of the present invention, a material leakage opening adapted to be connected to a screen material discharge nozzle is provided on the rotating frame and corresponding to the position of each screen, the length of the screening area is 1.6 times to 2.5 times the length of the material leakage opening, the screen is made of stainless steel, and the thickness of the screen is 3mm to 10mm.

[0011] As a preferred technical solution of the present invention, the air cleaning module includes an anti-cleaning fan installed on a shock-absorbing bracket, the air inlet port of the anti-cleaning fan is connected to a filter element, the air outlet port of the anti-cleaning fan is connected to an air supply pipe, the top of the screen box is connected to a recoil hood, and the air outlet port of the air supply pipe is connected to the recoil hood.

[0012] As a preferred technical solution of the present invention, the flow control and material diverting module includes an inner frame, a lifting frame, two annular drive belts and a group of material diverting plates. The inner frame is fixedly connected to the screen box, and two groups of symmetrically arranged lifting push rods are installed between the inner frame and the lifting frame. Two transmission rollers are rotatably connected between the inner surfaces of the lifting frame, and each of the transmission rollers is transmission-connected to the two annular drive belts. A conveying motor is installed on the lifting frame, and the output shaft end of the conveying motor is fixedly connected to one of the transmission rollers through a belt, and each of the material diverting plates is fixedly connected to the two annular drive belts.

[0013] As a preferred technical solution of the present invention, the flow control and material shifting module also includes a filling box, which is fixedly connected to the inner frame, and a booster fan is installed on the bottom surface of the filling box. A booster box is installed between the inner surfaces of the lifting frame, and an air outlet port of the booster fan is connected to the inner cavity of the booster box through a pressure supply pipe. The bottom surface of the booster box is evenly distributed with booster spray holes with the air outlet direction vertically downward. The booster box is arranged on the inner side of the annular drive belt, and the recoil hood is arranged above the booster box.

[0014] As a preferred technical solution of the present invention, the axes of the main winding roller, the auxiliary winding roller and the two guide rollers are all perpendicular to the rotation axis of the rotating frame.

[0015] As a preferred technical solution of the present invention, a material guide nozzle is installed on the rotating frame and at a position corresponding to each screen.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This cleaning screen has both modular synchronous rotary cleaning mode and single screen flow control screening mode when working. Through the realization of the above dual modes, the functionality and applicable scenarios of this device are effectively improved. In addition, this cleaning screen has the electric switching function of the sieve hole aperture when working, which effectively increases the applicable scenarios of this cleaning screen.

[0018] 2. In the present invention, when it is necessary to change the aperture of the cleaning screen, the rotating frame remains stationary, and the rotation direction and rotation angle of the active gear ring are controlled so that the multiple main rollers on the rotating frame rotate at a set speed and a set number of times. After the main rollers rotate at a set number of times and at a set speed, the positions of the screening areas on each screen are switched, and finally the screening area with a specified aperture on the screen corresponds to the position of the open area, thereby realizing the switching or conversion of the screening aperture of the screening device.

[0019] 3. In the rotary screening mode of the present invention, first, each screen completes the switching of the aperture of the screen hole. After the aperture of the screen hole is switched, the lifting frame is lifted to the set height. The height of the lifting frame is controlled so that the set spacing between the annular drive belt and the rotary frame is maintained, and finally the lifting frame does not affect the normal rotation of the rotary frame. Before the rotary screening mode is carried out, the rotary frame is kept at a set angle with the horizontal plane by setting the adjustment arm push rod. When the rotary screening mode is carried out, the rotary frame rotates at a set speed, and the grain to be screened is injected through the filling box, thereby realizing the rotary screening of the grain. At the same time, when the rotary screening mode is carried out, the booster fan continues to work, thereby improving the efficiency of screening the grain through the screen holes and increasing the pressure of the grain when it passes through the screen holes through the wind pressure, thereby effectively reducing the blockage rate of the screen holes. In this mode, the vibration motor outputs the vibration frequency in a set state, thereby realizing the vibration screening of the cleaning screen.

[0020] 4. In the present invention, in the fixed screening mode, the rotating frame is kept horizontal with the horizontal plane, a screen is rotated to the bottom of the annular driving belt, and the screen is switched to the set screening aperture. After the position of the screen is changed, the active gear ring reciprocates forward and reverse within the set angle range, and the active gear ring reciprocates forward and reverse, so that the screen can reciprocate within the set stroke. After the screen reciprocates within the set stroke, the flow rate of the grain to be screened on the screen is effectively improved and the effect of distinct grain separation of the grain to be screened on the screen is improved, so as to reduce the misselection and leakage rate of the screening device. At the same time, when the fixed screening mode is carried out, the height of the lifting frame is set so that the material stripping plate is fitted with the used screen. When the material stripping plate is fitted with the gauze, the annular driving belt rotates periodically at intervals, and the grain to be screened is displaced in the direction of the guide nozzle at a set speed, thereby realizing the flow control screening operation. In this mode, the booster fan works, and the vibration motor outputs the vibration frequency in a set state, thereby realizing the vibration screening of the cleaning screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a multi-module combined grain vibration cleaning screen of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0023] Figure 3 It is a structural schematic diagram of the second motor and the hinge shaft of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the injection box and the screening area of ​​the present invention;

[0025] Figure 5 It is a structural schematic diagram of the material guide nozzle and the rotating frame of the present invention;

[0026] Figure 6 For the present invention Figure 5A schematic diagram of the local enlarged structure at B in the middle;

[0027] Figure 7 It is a schematic diagram of the structure of the guide roller and the tensioning shaft of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the inner frame and the pressure delivery pipe of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the screening material discharge nozzle of the present invention.

[0030] In the figure: 1, screen box; 2, screen material discharge nozzle; 3, first motor; 4, rotating frame; 5, second motor; 6, gear sleeve; 7, driving gear ring; 8, main roll roller; 9, guide nozzle; 10, auxiliary roll roller; 11, guide roller; 12, screen; 13, screening area; 14, shock-absorbing bracket; 15, connecting rod; 16, adjusting arm push rod; 17, hinge shaft; 18, caster; 19, vibration motor; 20, differential shaft; 21, main shaft ; 22. Differential gear; 23. Driven gear; 24. Linkage gear; 25. Tensioning shaft; 26. Torsion spring; 27. Leakage opening; 28. Anti-cleaning fan; 29. ​​Air supply pipe; 30. Recoil hood; 31. Inner frame; 32. Lifting frame; 33. Material removal plate; 34. Lifting push rod; 35. Driving roller; 36. Conveying motor; 37. Injection box; 38. Booster fan; 39. Booster box; 40. Pressure supply pipe. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figures 1 to 9 As shown, the present invention provides a multi-module combined grain vibration cleaning screen, which includes a vibration platform, and a screen box 1 with adjustable angle and capable of vibration is installed on the vibration platform;

[0033] The vibration platform includes two symmetrically arranged shock-absorbing brackets 14, two symmetrically arranged connecting rods 15 are installed between the two shock-absorbing brackets 14, an adjusting arm push rod 16 is hinged between the two shock-absorbing brackets 14 and the opposite surface of the screen box 1, hinge shafts 17 are fixedly installed on both sides of the screen box 1, and the two hinge shafts 17 are respectively hinged to the two shock-absorbing brackets 14, a group of casters 18 are installed on the bottom surfaces of the two shock-absorbing brackets 14, and two symmetrically arranged vibration motors 19 are installed on the top surface of the screen box 1;

[0034] During the screening operation, the two vibration motors 19 work synchronously. After the vibration motor 19 works, it cooperates with the shock-absorbing bracket 14 to make the screen box 1 vibrate at a set frequency. After the screen box 1 vibrates, it drives the cleaning screen to perform vibration screening operations.

[0035] The provision of casters 18 facilitates the rapid deployment and flexible movement of the cleaning screen;

[0036] The bottom of the screen box 1 is connected with a screen material discharge nozzle 2, and the inner wall of the screen box 1 is rotatably mounted with a rotating frame 4 driven by a first motor 3 and a gear sleeve 6 driven by a second motor 5;

[0037] The rotation speeds of the first motor 3 and the second motor 5 can be independently controlled;

[0038] The gear sleeve 6 is provided with a driving gear ring 7, and the rotating frame 4 is provided with a group of screening modules distributed in a circumferential array;

[0039] The screening module comprises a main roll 8, an auxiliary roll 10 and two guide rolls 11 which are rotatably mounted between the inner surfaces of the rotating frame 4;

[0040] The axes of the main winding roller 8, the auxiliary winding roller 10 and the two guide rollers 11 are all perpendicular to the rotation axis of the rotating frame 4;

[0041] The main winding roller 8 is connected to the driving ring gear 7 through a differential module;

[0042] The differential module includes a differential shaft 20 and a main shaft 21 which are rotatably connected to the rotating frame 4. A differential gear 22 is installed on the differential shaft 20. A driven gear 23 which is transmission-connected to the differential gear 22 is installed on the main reel 8. The radius of the differential gear 22 is 8 times the radius of the driven gear 23.

[0043] By setting the radius ratio between the differential gear 22 and the driven gear 23, the speed and number of rotations of the main reel 8 can be increased;

[0044] The differential shaft 20 and the main shaft 21 are both equipped with bevel gears, the two bevel gears mesh with each other, and the main shaft 21 is equipped with a linkage gear 24, which is transmission-connected to the driving ring gear 7;

[0045] A tensioning retainer is provided at the rotational connection between the auxiliary winding roller 10 and the rotating frame 4;

[0046] The tensioning retainer includes a tensioning shaft 25 rotatably connected to the rotating frame 4, a chain belt is connected between the tensioning shaft 25 and the auxiliary winding roller 10, and a torsion spring 26 is provided at the rotation connection between the tensioning shaft 25 and the rotating frame 4;

[0047] A screen 12 is wound between the main winding roller 8 and the auxiliary winding roller 10, and the two guide rollers 11 are both in contact with the screen 12;

[0048] A material guide nozzle 9 is installed on the rotating frame 4 and at a position corresponding to each screen 12;

[0049] A group of screening areas 13 are sequentially arranged on the screen 12, each screening area 13 is densely covered with screen holes, and the apertures of the screen holes on each screening area 13 are different;

[0050] On the rotating frame 4, corresponding to each screen 12, there is a material leakage opening 27 adapted to communicate with the screen material discharge nozzle 2;

[0051] The length of the screening area 13 is twice the length of the leakage opening 27, and the screen 12 is made of stainless steel;

[0052] The thickness of the screen 12 is 4 mm;

[0053] During production and processing, the aperture of the sieve holes on each screening area 13 can be customized according to actual needs, thereby limiting the aperture of the sieve holes of the cleaning screen;

[0054] By setting the torsion spring 26, the screen 12 between the main winding roller 8 and the auxiliary winding roller 10 can be kept tensioned at all times;

[0055] An air cleaning module is installed on the top of the screen box 1 , and a flow control and material shifting module is provided on the screen box 1 and at a position corresponding to the inner side of the rotating frame 4 .

[0056] The air cleaning module includes an anti-cleaning fan 28 mounted on a shock-absorbing bracket 14, and the air inlet port of the anti-cleaning fan 28 is connected to a filter element;

[0057] By setting the filter element, the air intake of the anti-cleaning fan 28 is effectively guaranteed to be free of impurities;

[0058] The air outlet port of the anti-blower 28 is connected to an air supply pipe 29 , the top of the screen box 1 is connected to a recoil cover 30 , and the air outlet port of the air supply pipe 29 is connected to the recoil cover 30 .

[0059] The flow control and material diverting module includes an inner frame 31, a lifting frame 32, two annular drive belts 32 and a group of material diverting plates 33. The inner frame 31 is fixedly connected to the screen box 1. Two groups of symmetrically arranged lifting push rods 34 are installed between the inner frame 31 and the lifting frame 32. Two transmission rollers 35 are rotatably connected between the inner surfaces of the lifting frame 32. Each transmission roller 35 is transmission-connected to the two annular drive belts 32. A conveying motor 36 is installed on the lifting frame 32. The output shaft end of the conveying motor 36 is fixedly connected to a transmission roller 35 through a belt, and each material diverting plate 33 is fixedly connected to the two annular drive belts 32.

[0060] The flow control and material shifting module also includes a material injection box 37, which is fixedly connected to the inner frame 31. A booster fan 38 is installed on the bottom surface of the material injection box 37. A booster box 39 is installed between the inner surfaces of the lifting frame 32. The air outlet port of the booster fan 38 is connected to the inner cavity of the booster box 39 through a pressure supply pipe 40. The bottom surface of the booster box 39 is evenly distributed with booster spray holes with the air outlet direction vertically downward. The booster box 39 is arranged on the inner side of the annular drive belt 32, and the recoil hood 30 is arranged above the booster box 39.

[0061] The working principle and use process of the present invention:

[0062] During screening operation, the device is set with the following working modes:

[0063] The first working mode is a switching mode of the sieve aperture of the cleaning screen. In this mode, the rotating frame 4 remains stationary, and the rotation direction and rotation angle of the active gear ring 7 are controlled to make the multiple main rollers 8 on the rotating frame 4 rotate at a set speed and a set number of turns. After the main rollers 8 rotate at a set number of turns and a set speed, the positions of the screening areas 13 on each screen 12 are switched, and finally the screening area 13 with a specified sieve aperture on the screen 12 corresponds to the position of the open area, thereby realizing the switching or conversion of the screening aperture of the screening device;

[0064] The second working mode is the rotary screening mode. In the rotary screening mode, first, each screen 12 completes the switching of the screen hole aperture. After the switching of the screen hole aperture is completed, the lifting frame 32 is lifted to the set height. The height of the lifting frame 32 is controlled so that the annular driving belt 32 and the rotary frame 4 maintain a set distance, and finally the lifting frame 32 does not affect the normal rotation of the rotary frame 4. Before the rotary screening mode is performed, the rotary frame 4 is kept at a set angle with the horizontal plane by setting the adjustment arm push rod 16. When the rotary screening mode is performed, the rotary frame 4 rotates at a set speed, and the grain to be screened is injected through the injection box 37, thereby realizing the rotary screening of the grain. At the same time, when the rotary screening mode is performed, the booster fan 38 continues to work, thereby improving the efficiency of grain screening through the sieve holes and increasing the pressure of grain passing through the sieve holes through wind pressure, thereby effectively reducing the blockage rate of the sieve holes. In this mode, the vibration motor 19 outputs the vibration frequency in a set state, thereby realizing the vibration screening of the cleaning screen;

[0065] The third working mode is the fixed screen mode. In the fixed screen mode, the rotating frame 4 is kept horizontal with the horizontal plane, a screen 12 is rotated to the position directly below the annular driving belt 32, and the screen 12 is switched to the set screening aperture. After the position of the screen 12 is changed, the active gear ring 7 reciprocates forward and reverse within the set angle range. The reciprocating forward and reverse rotation of the active gear ring 7 enables the screen 12 to reciprocate within the set stroke. After the screen 12 reciprocates within the set stroke, the flow rate of the grain to be screened on the screen 12 is effectively improved and the grain to be screened on the screen 12 is improved. The grains of selected grains are clearly separated to reduce the misselection and missed screening rate of the screening device. At the same time, when the fixed screening mode is in progress, the height of the lifting frame 32 is set so that the material-selecting plate 33 is fitted with the screen 12 being used. When the material-selecting plate 33 is fitted with the gauze, the annular driving belt 32 rotates periodically at intervals, and the grains to be screened are displaced in the direction of the guide nozzle 9 at a set speed, thereby realizing the flow control screening operation. In this mode, the booster fan 38 works, and the vibration motor 19 outputs the vibration frequency in a set state, thereby realizing the vibration screening of the cleaning screen;

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-module combined grain vibrating cleaning screen, comprising a vibrating platform, on which is mounted a screen box (1) with an adjustable angle and capable of vibrating, the bottom of which is connected to a screen material discharge nozzle (2), characterized in that: The inner wall of the screen box (1) is rotatably mounted with a rotating frame (4) driven by a first motor (3) and a gear sleeve (6) driven by a second motor (5), the gear sleeve (6) is mounted with an active gear ring (7), and the rotating frame (4) is mounted with a group of screening modules distributed in a circumferential array; The screening module comprises a main roller (8), an auxiliary roller (10) and two guide rollers (11) which are rotatably mounted between the inner surfaces of a rotating frame (4); the main roller (8) is connected to the driving gear ring (7) through a differential module; a tensioning retainer is provided at the rotation connection between the auxiliary roller (10) and the rotating frame (4); a screen (12) is wound between the main roller (8) and the auxiliary roller (10); the two guide rollers (11) are both in contact with the screen (12); a group of screening areas (13) are sequentially arranged on the screen (12); each of the screening areas (13) is densely covered with screen holes; the apertures of the screen holes on each of the screening areas (13) are different; an air cleaning module is installed on the top of the screen box (1); and a flow control and material diverting module is provided on the screen box (1) and at a position corresponding to the inner side of the rotating frame (4).

2. The multi-module combined grain vibrating cleaning screen according to claim 1 is characterized in that: The vibration platform comprises two symmetrically arranged shock-absorbing brackets (14), two symmetrically arranged connecting rods (15) are installed between the two shock-absorbing brackets (14), an adjusting arm push rod (16) is hinged between the two shock-absorbing brackets (14) and the opposite surface of the screen box (1), hinge shafts (17) are fixedly installed on both side surfaces of the screen box (1), and the two hinge shafts (17) are respectively hinged to the two shock-absorbing brackets (14), a group of casters (18) are installed on the bottom surfaces of the two shock-absorbing brackets (14), and two symmetrically arranged vibration motors (19) are installed on the top surface of the screen box (1).

3. The multi-module combined grain vibrating cleaning screen according to claim 1 is characterized in that: The differential module comprises a differential shaft (20) and a main shaft (21) which are rotatably connected to a rotating frame (4); a differential gear (22) is mounted on the differential shaft (20); a driven gear (23) which is transmission-connected to the differential gear (22) is mounted on the main roller (8); the radius of the differential gear (22) is 9 to 4 times the radius of the driven gear (23); bevel gears are mounted on both the differential shaft (20) and the main shaft (21); the two bevel gears are meshed with each other; a linkage gear (24) is mounted on the main shaft (21); the linkage gear (24) is transmission-connected to a driving ring gear (7).

4. The multi-module combined grain vibrating cleaning screen according to claim 3 is characterized in that: The tensioning retaining member comprises a tensioning shaft (25) rotatably connected to the rotating frame (4), a chain belt is transmission-connected between the tensioning shaft (25) and the auxiliary winding roller (10), and a torsion spring (26) is provided at the rotation connection between the tensioning shaft (25) and the rotating frame (4).

5. The multi-module combined grain vibrating cleaning screen according to claim 1 is characterized in that: A material leakage opening (27) adapted to communicate with the screening material discharge nozzle (2) is provided on the rotating frame (4) and at a position corresponding to each screen (12). The length of the screening area (13) is 1.6 to 2.5 times the length of the material leakage opening (27). The screen (12) is made of stainless steel and has a thickness of 3 mm to 10 mm.

6. The multi-module combined grain vibrating cleaning screen according to claim 1 is characterized in that: The air cleaning module comprises an anti-cleaning fan (28) mounted on a shock-absorbing bracket (14); an air inlet port of the anti-cleaning fan (28) is connected to a filter element; an air outlet port of the anti-cleaning fan (28) is connected to an air supply pipe (29); the top of the screen box (1) is connected to a recoil hood (30); and an air outlet port of the air supply pipe (29) is connected to the recoil hood (30).

7. The multi-module combined grain vibrating cleaning screen according to claim 6 is characterized in that: The flow control and material shifting module comprises an inner frame (31), a lifting frame (32), two annular driving belts (32) and a group of material shifting plates (33); the inner frame (31) is fixedly connected to the screen box (1); two groups of symmetrically arranged lifting push rods (34) are installed between the inner frame (31) and the lifting frame (32); two transmission rollers (35) are rotatably connected between the inner surfaces of the lifting frame (32); each of the transmission rollers (35) is transmission-connected to the two annular driving belts (32); a conveying motor (36) is installed on the lifting frame (32); the output shaft end of the conveying motor (36) is fixedly connected to one of the transmission rollers (35) through a belt; and each of the material shifting plates (33) is fixedly connected to the two annular driving belts (32).

8. The multi-module combined grain vibrating cleaning screen according to claim 7 is characterized in that: The flow control and material shifting module also includes a material injection box (37), the material injection box (37) is fixedly connected to the inner frame (31), a booster fan (38) is installed on the bottom surface of the material injection box (37), a booster box (39) is installed between the inner surfaces of the lifting frame (32), the air outlet port of the booster fan (38) is connected to the inner cavity of the booster box (39) through a pressure supply pipe (40), the bottom surface of the booster box (39) is evenly distributed with booster spray holes with the air outlet direction vertically downward, the booster box (39) is arranged on the inner side of the annular driving belt (32), and the recoil cover (30) is arranged above the booster box (39).

9. The multi-module combined grain vibrating cleaning screen according to claim 1, characterized in that: The axes of the main winding roller (8), the auxiliary winding roller (10) and the two guide rollers (11) are all perpendicular to the rotation axis of the rotating frame (4).

10. The multi-module combined grain vibrating cleaning screen according to claim 1, characterized in that: A material guide nozzle (9) is installed on the rotating frame (4) at a position corresponding to each screen (12).

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