Efficient screening device for tobacco processing

Abstract

According to the efficient screening device for tobacco processing, a first-stage conveying belt and a power driving mechanism are arranged at the top of a support, a first-stage screening device located at the discharging end of the first-stage conveying belt is connected with the power driving mechanism, and on the premise that the discharging end of the first-stage conveying belt vertically corresponds to a feeding port of the first-stage screening device, the first-stage screening device is connected with the power driving mechanism; the power driving mechanism drives the first-stage screening device to reciprocate in the length direction of the support. Second-stage conveying belts installed on the support are arranged on the two long edge sides of the first-stage screening device, and the discharging ends of the second-stage conveying belts are located over a third-stage conveying belt below the support. A second-stage screening device installed on the support is arranged under the first-stage screening device, and the discharging end of the second-stage screening device is located over the fourth-stage conveying belt. The small tobacco leaf screening device improves the material screening processing capacity and processing precision of a production line, achieves rapid separation of small tobacco leaves and impurities, is simple in structure, novel in design, good in screening effect and high in efficiency, and has high use value.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco processing, and in particular relates to a high-efficiency screening device for tobacco processing. Background Art

[0002] During the tobacco leaf processing, the materials need to be screened to remove debris or classify the materials. In the tobacco leaf screening process, the screening processing accuracy is required to be high. Higher screening processing accuracy requires that as many materials as possible be removed, and at the same time, multiple groups of materials can be screened out, which can minimize system errors and improve material controllability. At present, there are the following problems in the tobacco leaf screening process. The first is the screening of irregular materials. For example, in the process of leaf beating and re-baking, the roasted stem heads and long and short stems need to be separated. The long and short stems have regular shapes and smooth surfaces. Generally, they can be well screened through common hole screens. The shape of the stem heads is irregular, and it is difficult to set the aperture with a general hole screen. In addition, the stem heads are easily stuck in the screen during the actual screening process. The second is the processing capacity. The screening process cannot be too slow, otherwise it will affect the flow of the previous material, and then affect the flow of the entire production line. Therefore, it is necessary to improve the above problems. Utility Model Content

[0003] The technical problem solved by the utility model is: to provide a high-efficiency screening device for tobacco processing, which can efficiently screen out multiple groups of tobacco leaf materials by optimizing the tobacco leaf screening mechanism and adopting a primary screening device and a secondary screening device, thereby improving the material screening and processing capacity and processing accuracy of the production line, solving the problem of the existing tobacco leaf screening structure that the tobacco leaf stems are easily stuck in the net and the screening capacity is poor, and realizing the rapid separation of small tobacco leaves and impurities, having a simple structure, a novel design, a good screening effect, a high efficiency, and a high use value.

[0004] The technical solution adopted by the utility model is as follows: a high-efficiency screening device for tobacco processing, comprising a bracket, a primary conveyor belt and a power drive mechanism located at the discharge end of the primary conveyor belt are provided on the top of the bracket, and the primary screening device located at the discharge end of the primary conveyor belt is connected to the power drive mechanism, and on the premise that the discharge end of the primary conveyor belt corresponds to the feed port of the primary screening device up and down, the power drive mechanism drives the primary screening device to reciprocate along the length direction of the bracket; secondary conveyor belts installed on the bracket are provided on both long sides of the primary screening device, and the discharge end of the secondary conveyor belt is located directly above the third-level conveyor belt below the bracket; a secondary screening device installed on the bracket is provided directly below the primary screening device, and the discharge end of the secondary screening device is located directly above the fourth-level conveyor belt.

[0005] The first-level screening device comprises a screening bucket with an upward opening and a bucket-shaped structure, the screening bucket comprises side plates on both sides and a bottom plate with a V-shaped structure fixedly connected to the two side plates, a first-level leak-proof arc plate with a downward opening and a semicircular structure is fixed on the upper edge of the bottom plate, a second-level leak-proof arc plate is fixed on the lower edge of the bottom plate, and the upper edge of the second-level leak-proof arc plate is located on the same plane as the upper edge of the side plate; a hole for impurities is provided on the surface of the side plate, a U-shaped opening for small tobacco leaves is provided on the lower edge of the side plate, and the upstream oblique edge of the side plate A large tobacco leaf sieve outlet is opened at the position, and a large tobacco leaf sieve outlet channel connected with the large tobacco leaf sieve outlet is fixed on the outer wall of the lateral plate; a plurality of small tobacco leaf vertical leakage holes, large impurity leakage holes, small impurity leakage holes and small tobacco leaf snowflake leakage holes are opened on the downstream plate surface of the bottom plate, an arc-shaped sieve plate is fixedly connected to the corner position in the middle of the bottom plate, small tobacco leaf impurity holes are opened on the two side walls of the arc-shaped sieve plate, and a plurality of small tobacco leaf horizontal leakage holes and impurity leakage middle holes are opened on the upper surface of the arc-shaped sieve plate, and a circular leakage hole located below the arc-shaped sieve plate is opened on the plate surface at the corner position in the middle of the bottom plate.

[0006] Furthermore, the small tobacco leaf snowflake leakage holes are in the shape of snowflakes, and the small tobacco leaf transverse leakage holes and impurity leakage holes are in the shape of long strips and are evenly distributed horizontally.

[0007] Furthermore, the power drive mechanism includes a motor and a connecting plate, the upper surface of the connecting plate is fixedly connected with a soft spring and a hard spring, the top of the soft spring and the hard spring are fixedly connected to the bottom of the sieve bucket in the primary screening device, the lower surface of the connecting plate is fixedly connected with a guide slide and a power slide, the guide slide is sleeved on the light rod, and the power slide is slidably connected to the slide rod, the two ends of the light rod and the slide rod are fixedly connected to the fixed seats at the corresponding ends, and the fixed seat is fixed to the top of the bracket, and the inner wall of the fixed seat is fixedly connected There is a buffer corresponding to the position of the connecting plate, a power rod is fixedly connected to the ear plate on the bottom surface of the power slide, and the end of the power rod is rotatably connected to one end of the first-level connecting rod, the other end of the first-level connecting rod is rotatably connected to the second-level connecting rod and one end of the third-level connecting rod through a movable ring, the other end of the second-level connecting rod is rotatably connected to the first hinge, the other end of the third-level connecting rod is hinged to one end of the fourth-level connecting rod, the other end of the fourth-level connecting rod and the motor output shaft installed on the second hinge are both rotatably connected to the second hinge, and the motor output shaft at the other end of the fourth-level connecting rod is fixedly connected.

[0008] Furthermore, two of the soft springs and two of the hard springs are provided.

[0009] Furthermore, the secondary screening device includes a small tobacco leaf screening bucket, the four-stage conveyor belt is arranged directly below the small tobacco leaf screening bucket, and the small tobacco leaf screening bucket is fixedly connected to the bracket directly above, and a plurality of impurity filtering holes are provided on the bottom surface of the upstream section of the small tobacco leaf screening bucket, and a discharge hopper with an outlet located above the four-stage conveyor belt is provided on the inner bottom wall of the downstream section of the small tobacco leaf screening bucket, and arc-shaped recessed grooves are provided on the edges of the four sides of the bottom surface of the discharge hopper, and the arc-shaped recessed grooves are inclined at a distance from the discharge port of the bottom surface of the discharge hopper.

[0010] Furthermore, the plurality of impurity filtering holes are evenly distributed on the bottom surface of the upstream section of the small tobacco leaf screening hopper and are in a dovetail shape.

[0011] The advantages of this utility model compared with the prior art:

[0012] 1. This technical solution optimizes the tobacco screening mechanism and adopts a primary screening device and a secondary screening device to efficiently screen out multiple groups of tobacco materials, thereby increasing the processing capacity and processing accuracy of material screening in the production line, solving the problem of stems being easily stuck in the net and poor screening capacity in the existing tobacco screening structure, and realizing the rapid separation of small tobacco leaves and impurities;

[0013] 2. This technical solution is provided with a power drive mechanism with a connecting rod mechanism, and the motor drives the power slide to move on the slide rod through the connecting rod mechanism, which in turn drives the sieve bucket to move back and forth and the soft spring and the hard spring to vibrate with different amplitudes. During the vibration process, due to the large inertia effect, the tobacco leaves are automatically separated to the large tobacco leaf screen outlet and screened out, so that the large and small tobacco leaves and impurities can be quickly separated;

[0014] 3. This technical solution sets up a secondary screening device, specifically, impurities are filtered out through the impurity filtering holes, and the small tobacco leaves enter the fourth-level conveyor belt and quickly enter the next process, quickly completing the rapid separation of small tobacco leaves and impurities;

[0015] 4. This technical solution has a simple structure, novel design, good screening effect, high efficiency and high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the primary screening device of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the power drive mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the two-stage screening device of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiment of the present utility model Figure 1-4 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that, in this article, the terms "include", "comprises" 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. In the absence of further restrictions. The elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] High-efficiency screening devices for tobacco processing, such as Figure 1 As shown, it includes a bracket 3, a primary conveyor belt 4 and a power drive mechanism 5 located at the discharge end of the primary conveyor belt 4 are provided on the top of the bracket 3, and the primary screening device 1 located at the discharge end of the primary conveyor belt 4 is connected to the power drive mechanism 5, and under the premise that the discharge end of the primary conveyor belt 4 corresponds to the feed port of the primary screening device 1 up and down, the power drive mechanism 5 drives the primary screening device 1 to reciprocate along the length direction of the bracket 3; the two long sides of the primary screening device 1 are both provided with secondary conveyor belts 6 installed on the bracket 3, and the discharge end of the secondary conveyor belt 6 is located at the bracket 3. The first screening device 1 is directly above the third-level conveyor belt 8 below; a second-level screening device 2 installed on the bracket 3 is provided directly below the first-level screening device 1, and the discharge end of the second-level screening device 2 is located directly above the fourth-level conveyor belt 7; in the above structure, by optimizing the tobacco screening mechanism, the first-level screening device 1 and the second-level screening device 2 can efficiently screen out multiple groups of tobacco materials, improve the material screening and processing capacity and processing accuracy of the production line, solve the problem of easy net jamming and poor screening capacity of the existing tobacco screening structure, and quickly complete the separation of small tobacco leaves and impurities;

[0023] The structure in which the discharge end of the primary conveyor belt 4 corresponds to the feed port of the primary screening device 1 above and below can smoothly connect to the raw material production line. The secondary conveyor belt 6 can smoothly and timely transport the large tobacco leaves to the next production line through the tertiary conveyor belt 8. The leak-proof side panels arranged on the two long sides of the secondary conveyor belt 6 can prevent small tobacco leaves and their debris from running onto the secondary conveyor belt 6, while ensuring that the large tobacco leaves do not run out of the secondary conveyor belt 6.

[0024] like Figure 2As shown, the specific structure of the primary screening device 1 is as follows: the primary screening device 1 includes a screening bucket 1-1 with an opening facing upward and in a bucket-shaped structure, the screening bucket 1-1 includes side plates 1-101 on both sides and a bottom plate 1-102 with a V-shaped structure fixedly connected to the two side plates 1-101, and a primary leak-proof arc plate 1-103 with an opening facing downward and in a semicircular structure is fixed along the upper end plate of the bottom plate 1-102. -102 is fixed with a secondary anti-leakage arc plate 1-104 at the lower end edge of the plate, and the upper edge of the secondary anti-leakage arc plate 1-104 is located on the same plane as the upper edge of the lateral plate 1-101; the lateral plate 1-101 is provided with an impurity hole 1-2, the lower edge of the lateral plate 1-101 is provided with a small tobacco leaf U-shaped opening 1-3, the upstream oblique edge of the lateral plate 1-101 is provided with a large tobacco leaf sieve outlet 1-4, and the lateral plate 1-101 is provided with a large tobacco leaf sieve outlet 1-4. A large tobacco leaf screening channel 1-5 connected to the large tobacco leaf screening outlet 1-4 is fixed on the outer wall of the bottom plate 1-102; a plurality of small tobacco leaf vertical leakage holes 1-6, large impurity leakage holes 1-7, small impurity leakage holes 1-8 and small tobacco leaf snowflake leakage holes 1-9 are opened on the downstream plate surface of the bottom plate 1-102; an arc-shaped screen plate 1-10 is fixedly connected to the corner position in the middle of the bottom plate 1-102, and small tobacco leaf impurity holes 1-10 are opened on the two side walls of the arc-shaped screen plate 1-10. 11, and a plurality of small tobacco leaf transverse leakage holes 1-12 and impurity leakage holes 1-13 are provided on the upper surface of the arc sieve plate 1-10, and a circular leakage hole 1-14 located below the arc sieve plate 1-10 is provided on the plate surface at the corner position in the middle of the bottom plate 1-102; specifically, the small tobacco leaf snowflake leakage hole 1-9 is in the shape of a snowflake, and the small tobacco leaf transverse leakage holes 1-12 and impurity leakage holes 1-13 are evenly distributed in long strips;

[0025] like Figure 3As shown, the specific structure of the power drive mechanism 5 is as follows: the power drive mechanism 5 includes a motor 5-18 and a connecting plate 5-1, the upper surface of the connecting plate 5-1 is fixedly connected with a soft spring 5-2 and a hard spring 5-3, the tops of the soft spring 5-2 and the hard spring 5-3 are fixedly connected to the bottom of the sieve bucket 1-1 in the primary screening device 1, the lower surface of the connecting plate 5-1 is fixedly connected with a guide slide 5-4 and a power slide 5-8, the guide slide 5-4 is sleeved on the light rod 5-5, and the power slide 5-8 is fixedly connected to the guide slide 5-4. The power slide seat 5-8 is slidably connected to the slide bar 5-7, and both ends of the light rod 5-5 and the slide bar 5-7 are fixedly connected to the fixed seat 5-6 at the corresponding ends, and the fixed seat 5-6 is fixed to the top of the bracket 3, and the buffer 5-10 corresponding to the position of the connecting plate 5-1 is fixedly connected to the inner wall of the fixed seat 5-6, and the power rod 5-9 is fixedly connected to the ear plate on the bottom surface of the power slide seat 5-8, and the end of the power rod 5-9 is rotatably connected to one end of the primary connecting rod 5-11, and the other end of the primary connecting rod 5-11 is connected by a movable The moving ring 5-12 is rotatably connected to one end of the secondary connecting rod 5-13 and the tertiary connecting rod 5-14, the other end of the secondary connecting rod 5-13 is rotatably connected to the first hinge 5-15, the other end of the tertiary connecting rod 5-14 is hinged to one end of the fourth connecting rod 5-16, the other end of the fourth connecting rod 5-16 and the output shaft of the motor 5-18 installed on the second hinge 5-17 are both rotatably connected to the second hinge 5-17, and the other end of the fourth connecting rod 5-16 is fixedly connected to the output shaft of the motor 5-18; specifically, the soft Two soft springs 5-2 and two hard springs 5-3 are provided respectively; in the above structure, a power driving mechanism 5 with a connecting rod mechanism is provided, and the motor 5-18 drives the power slide 5-8 to move on the slide bar 5-7 through the connecting rod mechanism, thereby driving the sieve bucket 1-1 to reciprocate and the soft spring 5-2 and the hard spring 5-3 to vibrate with different amplitudes. During the vibration process, due to the large inertia effect, the tobacco leaves are automatically separated to the large tobacco leaf screen outlet 1-4 and screened out, so that the large and small tobacco leaves and impurities can be quickly separated;

[0026] like Figure 4As shown, the specific structure of the secondary screening device 2 is as follows: the secondary screening device 2 includes a small tobacco leaf screening bucket 2-1, the four-stage conveyor belt 7 is arranged directly below the small tobacco leaf screening bucket 2-1, and the small tobacco leaf screening bucket 2-1 is fixedly connected to the bracket 3 directly above, and a plurality of impurity filtering holes 2-2 are provided on the bottom surface of the upstream section of the small tobacco leaf screening bucket 2-1, and a discharge hopper 2-5 with an outlet located above the four-stage conveyor belt 7 is provided on the inner bottom wall of the downstream section of the small tobacco leaf screening bucket 2-1, and an arc-shaped concave groove 2-3 is provided at the edge position of the bottom surface of the discharge hopper 2-5, and the arc-shaped concave groove 2-3 is 1.5 meters from the bottom of the discharge hopper 2-5. The surface discharge port is located at a bevel port 2-4; specifically, a plurality of the impurity filter holes 2-2 are evenly distributed on the bottom surface of the upstream section of the small tobacco leaf screen bucket 2-1, and are in a dovetail shape; in the above structure, a secondary screening device 2 is provided, specifically, impurities are filtered out through the impurity filter holes 2-2, and the small tobacco leaves enter the fourth-level conveyor belt 7 and quickly enter the next process, thereby quickly completing the rapid separation of the small tobacco leaves and impurities; the impurity filter holes 2-2 can filter out impurities, and the arc-shaped recessed grooves 2-3 can further isolate small particle impurities from entering the fourth-level conveyor belt 7, and the bevel port 2-4 can facilitate the small tobacco leaves to enter the fourth-level conveyor belt 7.

[0027] When in use, first the first-level conveyor belt 4 guides the tobacco leaves into the screen bucket 1-1 through the discharge port, then the motor 5-18 is started, the fourth-level connecting rod 5-16 makes a circular motion, the fourth-level connecting rod 5-16 drives the third-level connecting rod 5-14 to move, the third-level connecting rod 5-14 drives the second-level connecting rod 5-13 to move, then the first-level connecting rod 5-11 swings, the first-level connecting rod 5-11 drives the power rod 5-9 to swing left and right, the power rod 5-9 drives the power slide 5-8 to swing back and forth on the slide 5-7, the guide slide 5-4 and the light rod 5-5 provide guidance and support for the movement, the buffer 5-10 provides limit and buffer for the movement, and then the soft spring 5-2 and the hard spring 5-3 vibrate up and down during the movement, driving the screen. The bucket 1-1 vibrates up and down, and the tobacco leaves vibrate up and down while swinging back and forth in the screen bucket 1-1. Under the action of various screen holes on the upper surface of the screen bucket 1-1, the large tobacco leaves vibrate to the large tobacco leaf screen outlet 1-4 and are screened out to the secondary conveyor belt 6, and finally are conveyed to the next process by the tertiary conveyor belt 8. The small tobacco leaves and impurities are screened out through the screen bucket 1-1 and caught by the small tobacco leaf screen bucket 2-1 below. The leak-proof side plates arranged on the two long sides of the secondary conveyor belt 6 isolate the small tobacco leaves and impurities from running into the secondary conveyor belt 6. The small tobacco leaf screen bucket 2-1 screens out impurities through the impurity filtering holes 2-2, and the excess impurities are intercepted in the arc-shaped concave groove 2-3. The small tobacco leaves are connected to the fourth-level conveyor belt 7 through the inclined surface opening 2-4 and enter the next process.

[0028] This technical solution has a simple structure, novel design, good screening effect, high efficiency and high use value.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An efficient screening device for tobacco processing, characterized in that: The invention comprises a support (3), wherein a primary conveyor belt (4) and a power drive mechanism (5) located at the discharge end of the primary conveyor belt (4) are provided on the top of the support (3), and a primary screening device (1) located at the discharge end of the primary conveyor belt (4) is connected to the power drive mechanism (5), and under the premise that the discharge end of the primary conveyor belt (4) corresponds to the feed port of the primary screening device (1) up and down, the power drive mechanism (5) drives the primary screening device (1) to reciprocate along the length direction of the support (3); the primary screening device (1) is provided with a secondary conveyor belt (6) installed on the support (3) on both long sides, and the discharge end of the secondary conveyor belt (6) is located directly above a tertiary conveyor belt (8) below the support (3); and a secondary screening device (2) installed on the support (3) is provided directly below the primary screening device (1), and the discharge end of the secondary screening device (2) is located directly above a quaternary conveyor belt (7).

2. The high-efficiency screening device for tobacco processing according to claim 1, characterized in that: The primary screening device (1) comprises a screening bucket (1-1) with an opening facing upward and in a bucket-shaped structure, the screening bucket (1-1) comprising side plates (1-101) on both sides and a bottom plate (1-102) of a V-shaped structure fixedly connected to the two side plates (1-101) as a whole, a primary leak-proof arc plate (1-103) with an opening facing downward and in a semicircular structure is fixed along the upper end plate of the bottom plate (1-102), and the bottom plate (1-103) is provided with a first-level leak-proof arc plate (1-103) with an opening facing downward and in a semicircular structure. A secondary anti-leakage arc plate (1-104) is fixed at the lower end edge of the plate (1-102), and the upper edge of the secondary anti-leakage arc plate (1-104) is located on the same plane as the upper edge of the lateral plate (1-101); an impurity hole (1-2) is opened on the plate surface of the lateral plate (1-101), a small tobacco leaf U-shaped opening (1-3) is opened at the lower edge of the plate surface of the lateral plate (1-101), and a slanted edge position of the upstream of the lateral plate (1-101) is opened. A large tobacco leaf sieve outlet (1-4) is provided, and a large tobacco leaf sieve outlet channel (1-5) connected to the large tobacco leaf sieve outlet (1-4) is fixed on the outer wall of the lateral plate (1-101); a plurality of small tobacco leaf vertical leakage holes (1-6), large impurity leakage holes (1-7), small impurity leakage holes (1-8) and small tobacco leaf snowflake leakage holes (1-9) are provided on the downstream plate surface of the bottom plate (1-102); the corner in the middle of the bottom plate (1-102) An arc-shaped sieve plate (1-10) is fixedly connected at a position, small tobacco leaf impurity holes (1-11) are provided on both side walls of the arc-shaped sieve plate (1-10), and a plurality of small tobacco leaf transverse leakage holes (1-12) and impurity leakage middle holes (1-13) are provided on the upper surface of the arc-shaped sieve plate (1-10), and a circular leakage hole (1-14) located below the arc-shaped sieve plate (1-10) is provided on the plate surface at a corner position in the middle of the bottom plate (1-102).

3. The high-efficiency screening device for tobacco processing according to claim 2, characterized in that: The small tobacco leaf snowflake leakage holes (1-9) are in the shape of snowflakes, and the small tobacco leaf transverse leakage holes (1-12) and the impurity leakage holes (1-13) are in the shape of long strips and are evenly distributed horizontally.

4. The high-efficiency screening device for tobacco processing according to claim 1, characterized in that: The power drive mechanism (5) comprises a motor (5-18) and a connecting plate (5-1), the upper surface of the connecting plate (5-1) is fixedly connected with a soft spring (5-2) and a hard spring (5-3), the tops of the soft spring (5-2) and the hard spring (5-3) are fixedly connected to the bottom of the sieve bucket (1-1) in the primary screening device (1), the lower surface of the connecting plate (5-1) is fixedly connected with a guide slide (5-4) and a power slide (5-8), the guide slide (5-4) is mounted on the light rod (5-5), and the power slide (5-8) is slidably connected to the slide rod (5-7), the two ends of the light rod (5-5) and the slide rod (5-7) are fixedly connected to the fixed seat (5-6) at the corresponding end, and the fixed seat (5-6) is fixedly connected to the top of the bracket (3), and the inner side wall of the fixed seat (5-6) is fixedly connected with a connecting plate ( A buffer (5-10) corresponding to the position of the power slide seat (5-1), a power rod (5-9) is fixedly connected to the ear plate on the bottom surface of the power slide seat (5-8), and the end of the power rod (5-9) is rotatably connected to one end of the first-stage connecting rod (5-11), the other end of the first-stage connecting rod (5-11) is rotatably connected to the second-stage connecting rod (5-13) and one end of the third-stage connecting rod (5-14) through a movable ring (5-12), the other end of the second-stage connecting rod (5-13) is rotatably connected to the first hinge (5-15), the other end of the third-stage connecting rod (5-14) is hinged to one end of the fourth-stage connecting rod (5-16), the other end of the fourth-stage connecting rod (5-16) and the output shaft of the motor (5-18) installed on the second hinge (5-17) are both rotatably connected to the second hinge (5-17), and the other end of the fourth-stage connecting rod (5-16) is fixedly connected to the output shaft of the motor (5-18).

5. The high-efficiency screening device for tobacco processing according to claim 4, characterized in that: Two of the soft springs (5-2) and two of the hard springs (5-3) are provided.

6. The high-efficiency screening device for tobacco processing according to claim 1, characterized in that: The secondary screening device (2) comprises a small tobacco leaf screening hopper (2-1), the four-stage conveyor belt (7) is arranged directly below the small tobacco leaf screening hopper (2-1), and the small tobacco leaf screening hopper (2-1) is fixedly connected to the bracket (3) directly above, a plurality of impurity filtering holes (2-2) are provided on the bottom surface of the upstream section of the small tobacco leaf screening hopper (2-1), a discharge hopper (2-5) with an outlet located above the four-stage conveyor belt (7) is provided on the inner bottom wall of the downstream section of the small tobacco leaf screening hopper (2-1), and arc-shaped concave grooves (2-3) are provided at the edges of the four sides of the bottom surface of the discharge hopper (2-5), and the arc-shaped concave grooves (2-3) are located at a beveled opening (2-4) from the discharge opening of the bottom surface of the discharge hopper (2-5).

7. The high-efficiency screening device for tobacco processing according to claim 6, characterized in that: The plurality of impurity filtering holes (2-2) are evenly distributed on the bottom surface of the upstream section of the small tobacco leaf screening hopper (2-1) and are in a dovetail shape.

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