Screening device of vibration conveying equipment and using method of screening device

Abstract

The invention discloses a vibration conveying equipment screening device and a using method thereof.The device comprises a screening assembly and a fast-assembly clamp used for fastening the screening assembly, the screening assembly comprises a vibration groove body and a screen arranged in the vibration groove body, and the screen comprises a first-layer screen and a second-layer screen located below the first-layer screen; hook holes are formed in the side wall face of the vibration groove body, the first layer of screen cloth is fastened in the vibration groove body through the hook holes by the fast-assembly clamp, a plurality of shell-shaped mesh holes are evenly formed in the bottom end face of the first layer of screen cloth, and the fast-assembly clamp comprises a clamp base arranged at the hook holes and a movable handle connected with the clamp base through a connecting body. A positioning pin hole is formed in the side end of the connecting body, the movable handle comprises a handle body and a hook arranged in the handle body, and a spring positioning pin inserted into the positioning pin hole is arranged at the side end of the handle body in a penetrating mode. The device has the characteristics of reasonable structural design, low manufacturing cost, high practicability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco machinery and equipment, and in particular to a vibrating conveying equipment screening device and a use method thereof. Background Art

[0002] Vibrating conveying equipment has the advantages of simple structure, easy installation and maintenance, and low noise. It is widely used in food, chemical, metallurgy, coal, building materials and other industries. In cigarette production, the vibrating conveyor plays the role of conveying tobacco leaves or tobacco shreds. In some process sections, the vibrating conveyor needs to be equipped with a screen to filter the broken tobacco and improve the quality of the material. In the prior art, the screen of the vibrating conveyor before the shredder is a double-layer screen structure, and the double-layer screen is fixed with rivets. The first layer of the screen screens small tobacco leaves below 6mm, and the second layer of the screen screens the broken and tobacco soil below 3mm. After screening by the first layer of the screen, the 3-6mm small tobacco leaves are directly transported across the shredder to the post-shredding process to avoid the production of broken tobacco shreds during shredding. After screening by the second layer of the screen, the broken and tobacco soil below 3mm are directly transported to the rod press for scrapping.

[0003] However, it was found in actual production that the existing screen structure is unreasonably designed. During the vibrating transportation, tobacco stems will fill the mesh holes of the first layer of screen and cause blockage, which weakens the screening capacity of the first layer of screen. In addition, the rivet fixing method of the screen makes disassembly and assembly complicated, which increases the difficulty of screen maintenance. As a result, the first layer of screen cannot be cleaned in time during production, and there is a risk of mixing. It can only be disassembled and cleaned during the shutdown and maintenance period, which takes about 3-4 hours. Not only does it seriously affect the production efficiency, but the second layer of screen cannot be effectively cleaned for a long time, and it is also very easy to breed tobacco insects, further affecting the quality of cigarettes. Summary of the invention In view of this, an object of the present invention is to provide a vibrating conveying equipment screening device, which can solve the technical problem that when the existing screen structure is used in actual production, tobacco stems will fill the screen holes of the first layer of screen during vibration transportation to cause blockage, thereby weakening the screening capacity of the first layer of screen. It can also solve the technical problem that the rivet fixing method of the screen is complicated to disassemble and increase the difficulty of maintaining the screen. At the same time, the present invention also provides a method for using the vibrating conveying equipment screening device, which is applied to the vibrating conveying equipment screening device. In order to solve the above technical problems, the technical solution adopted by the present invention is: A screening device for a vibrating conveying equipment comprises a screening component and a quick-release clamp for fastening the screening component, the screening component comprising a vibration trough body and a screen arranged inside the same, the screen comprising a first layer of screen and a second layer of screen located below the same, the side wall surface of the vibration trough body is provided with a hook hole, the quick-release clamp fastens the first layer of screen to the inside of the vibration trough body through the hook hole, the first layer of screen is provided with a side guard plate, the surface of the side guard plate is provided with a protective cover, the top of the protective cover is provided with a fixed handle, the bottom end surface of the first layer of screen is evenly provided with a plurality of shell-shaped mesh holes, the quick-release clamp comprises a clamp base arranged at the hook hole and a movable handle connected to the clamp base through a connector, the side end of the connector is provided with a positioning pin hole, the movable handle comprises a handle body and a hook arranged inside the same, and the side end of the handle body is penetrated by a spring positioning pin inserted into the positioning pin hole. Furthermore, a platform is provided inside the vibration trough body, and the platform has the function of providing support for the screen. The platform includes a first-layer platform and a second-layer platform located inside the first-layer platform. The first layer of screen is arranged on the top of the first-layer platform, and the second layer of screen is arranged on the top of the second-layer platform. The setting height of the first-layer platform is lower than the opening height of the hook hole to ensure that the quick-release clamp can contact the first layer of screen and smoothly fasten the first layer of screen to the top of the first-layer platform inside the vibration trough body.

[0004] Furthermore, side guard plates are symmetrically provided at the left and right ends of the first layer of screen. When the first layer of screen is placed inside the vibration tank body, the side guard plates at the left and right ends of the first layer of screen can respectively fit with the inner wall surface of the vibration tank body. The front and rear ends of the side guard plates are provided with protective covers with openings facing outward. The protective covers separate the surface of the first layer of screen into a working area for fastening the first layer of screen with a quick-release clamp. The top end of the fixed handle faces the inside of the first layer of screen. The first layer of screen can be quickly and effectively pulled out from the inside of the vibration tank body through the fixed handle.

[0005] Preferably, there are two first-layer screens, which are laid from the feed end of the vibration trough body to the discharge end of the vibration trough body. Each first-layer screen is provided with four protective covers, which are evenly distributed on the side guard plate surfaces at the left and right ends of the first-layer screen. The distribution position and number of the hook holes on the side wall of the vibration trough body are consistent with the distribution position and number of the protective covers.

[0006] Furthermore, the surface of the first layer of screen is configured such that the opening direction of the shell-shaped mesh is consistent with the conveying direction of the material, which can prevent tobacco stems in the material from being inserted into the mesh during the vibration conveying process, causing the mesh to be blocked and thus reducing the screening capacity of the first layer of screen.

[0007] Furthermore, threaded holes are provided on the left and right ends of the clamp base, and the clamp base is fixed to the bottom of the hook hole on the outer wall of the vibration groove body by bolts matching the threaded holes. The connecting body is fixedly connected to the surface of the clamp base, and the movable handle is movably connected to the connecting body by a pin shaft. The movable handle can move up and down relative to the connecting body with the pin shaft as the center of the circle. A movable shaft is provided inside the end of the handle body away from the connecting piece, and the tail end of the hook passes through the movable shaft and is tightened. The hook can move relative to the handle body with the movable shaft as the center of the circle. The head end of the hook is in the shape of a curved hook, and one side end of the connecting body extends a distance in the direction of the movable shaft close to the movable handle. The positioning pin hole is provided on the surface of one side end of the connecting body extending a distance, and the spring positioning pin can pass through the side end of the handle body and align with the inside of the positioning pin hole.

[0008] Preferably, the layout position and the number of the quick-release clamps are consistent with the distribution position and the number of the hook holes.

[0009] The present invention also provides a method for using the vibrating conveying equipment screening device, which is applied to the above-mentioned vibrating conveying equipment screening device, and the specific steps include: Step S1: Install the screening device of the vibrating conveying equipment before vibrating and conveying materials. First, lift the handle body of the quick-release clamp upward so that the head end of the hook is taken out from the hook hole. Then, place the second layer of screen inside the vibration trough body. Hold the fixed handle of the first layer of screen and place the first layer of screen above the second layer of screen to ensure that the layout position of the protective cover of the first layer of screen corresponds to the opening position of the hook hole. Place the head end of the hook in the hook hole and press the handle body downward so that the head end of the hook contacts the surface of the first layer of screen in the protective cover. The end of the handle body close to the connecting piece can be close to the front end outer surface of the clamp base. The first layer of screen is fastened to the inside of the vibration trough body to achieve the purpose of single self-locking. At this time, the head end of the hook is fixed at the hook hole. Finally, align the spring locating pin that passes through the side end of the handle body with the inside of the locating pin hole. Under the cooperation of the handle body close to the front end outer surface of the clamp base to form a single self-locking, the purpose of the double self-locking function of the quick-release clamp is achieved. Step S2: When the material is vibrated and transported by the vibrating conveying device, the material is screened by the first layer of screen laid from the feeding end of the vibration trough body to the discharging end of the vibration trough body. Among the materials, large pieces of tobacco leaves pass through the upper surface of the first layer of screen and enter the dropper provided at the rear end of the vibration conveying device to be cut into tobacco shreds by the shredder. Small tobacco leaves with a size of 3-6 mm fall through the shell-shaped mesh holes on the surface of the first layer of screen and reach the surface of the second layer of screen. The second layer of screen screens screen out the broken pieces and tobacco soil with a size of less than 3 mm. Step S3: When disassembling and maintaining the screening device of the vibration conveying equipment, pull the spring locating pin outward to make the spring locating pin disengage from the locating pin hole, and at the same time lift the handle body upward to further separate the end of the handle body close to the connecting piece from the front outer surface of the clamp base, then take the head end of the hook out of the hook hole, hold the fixed handle of the first layer of screen, lift the first layer of screen from the inside of the vibration trough body and place it in the preset maintenance position, finally, perform maintenance operations on the inside of the vibration trough body, the first layer of screen and the first layer of screen.

[0010] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The invention has the characteristics of reasonable structural design, low cost, strong practicality, etc. The shell-shaped mesh holes are arranged on the surface of the first layer of screen to prevent tobacco stems in the material from being inserted into the mesh holes during the vibration conveying process, causing the mesh holes to be blocked and thus weakening the screening ability of the first layer of screen; the quick-release clamp provided by the invention can not only fasten the first layer of screen to the inside of the vibration trough body, but also realize fast and effective disassembly of the first layer of screen, reduce the difficulty of screen maintenance, further improve production efficiency, save manpower, and avoid the second layer of screen from being effectively cleaned for a long time and breeding tobacco insects, thereby affecting the quality of cigarettes; the spring positioning pin of the quick-release clamp in the invention can penetrate the side end of the handle body and align with the inside of the positioning pin hole, and the handle body is close to the front end outer surface of the clamp base to form a self-locking cooperation to achieve the purpose of the double self-locking function of the quick-release clamp. Other beneficial effects of the present invention will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the first layer of screen of the present invention; Figure 3 It is a partial enlarged view of the quick clamp of the present invention; Figure 4 It is a schematic diagram of the structure of the quick-release clamp of the present invention; Among them: 1. Vibration trough body; 2. First layer of screen; 201. Side guard plate; 202. Protective cover; 203. Fixed handle; 204. Mesh; 3. Hook hole; 4. Quick-release clamp; 401. Clamp base; 402. Connector; 403. Positioning pin hole; 404. Handle body; 405. Hook; 406. Movable shaft; 407. Spring positioning pin; 408. Threaded hole. DETAILED DESCRIPTION

[0012] 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.

[0013] like Figures 1 to 4 As shown, the present invention provides a vibrating conveying equipment screening device, It includes a screening assembly and a quick-install clamp 4 for fastening the screening assembly, the screening assembly includes a vibration tank body 1 and a screen set inside the vibration tank body, the screen includes a first layer of screen 2 and a second layer of screen located below the first layer of screen, the side wall of the vibration tank body 1 is provided with a hook hole 3, the quick-install clamp 4 fastens the first layer of screen 2 to the inside of the vibration tank body 1 through the hook hole 3, the first layer of screen 2 is provided with a side guard plate 201, the surface of the side guard plate 201 is provided with a protective cover 202, and the top of the protective cover 202 is provided with a fixed Handle 203, the bottom end surface of the first layer of screen 2 is evenly provided with a plurality of shell-shaped mesh holes 204, the quick-release clamp 4 includes a clamp base 401 arranged at the hook hole 3 and a movable handle connected to the clamp base 401 through a connector 402, a locating pin hole 403 is provided at the side end of the connector 402, the movable handle includes a handle body 404 and a hook 405 arranged therein, and a spring locating pin 407 is penetrated through the side end of the handle body 404 and inserted into the locating pin hole 403. In the embodiment of the present invention, a platform is provided inside the vibration trough body 1, and the platform has the function of providing support for the screen. The platform includes a first layer platform and a second layer platform located inside the first layer platform. The first layer of screen 2 is arranged on the top of the first layer platform, and the second layer of screen is arranged on the top of the second layer platform. The setting height of the first layer platform is lower than the opening height of the hook hole 3 to ensure that the quick-release clamp 4 can contact with the first layer of screen 2 and smoothly fasten the first layer of screen 2 to the top of the first layer platform inside the vibration trough body 1.

[0014] In the embodiment described in the present invention, side guard plates 201 are symmetrically provided on the left and right ends of the first layer of screen 2. When the first layer of screen 2 is placed inside the vibration tank body 1, the side guard plates 201 on the left and right ends of the first layer of screen 2 can respectively fit with the inner wall surface of the vibration tank body 1, and the front and rear ends of the side guard plates 201 are both provided with protective covers 202 with openings facing outward. The protective covers 202 separate the surface of the first layer of screen 2 into a working area for the quick-release clamp 4 to fasten the first layer of screen 2. The top end of the fixed handle 203 faces the inner side of the first layer of screen 2. The first layer of screen 2 can be quickly and effectively pulled out from the inside of the vibration tank body 1 through the fixed handle 203.

[0015] Preferably, the number of the first-layer screens 2 is two, and the two first-layer screens 2 are laid from the feed end of the vibration trough body 1 to the discharge end of the vibration trough body 1. Each first-layer screen 2 is provided with four protective covers 202, which are evenly distributed on the surface of the side guard plates 201 at the left and right ends of the first-layer screen 2. The distribution position and number of the hook holes 3 on the side wall of the vibration trough body 1 are consistent with the distribution position and number of the protective covers 202.

[0016] In the embodiment of the present invention, the surface of the first layer of screen 2 is configured such that the opening direction of the shell-shaped mesh 204 is consistent with the conveying direction of the material, which can prevent tobacco stems in the material from being inserted into the mesh 204 during the vibration conveying process, causing the mesh 204 to be blocked and thus weakening the screening capacity of the first layer of screen 2.

[0017] In the embodiment of the present invention, the quick-release clamp 4 can not only fasten the first layer of screen 2 to the inside of the vibration tank body 1, but also realize the quick and effective disassembly of the first layer of screen 2, thereby reducing the difficulty of screen maintenance, further improving production efficiency, and avoiding the situation where the second layer of screen cannot be effectively cleaned for a long time and breeds tobacco insects, thereby affecting the quality of cigarettes. The left and right ends of the clamp base 401 are provided with threaded holes 408, and the clamp base 401 is fixed to the bottom of the hook hole 3 on the outer wall of the vibration groove body 1 by bolts matching the threaded holes 408. The connecting body 402 is fixedly connected to the surface of the clamp base 401, and the movable handle is movably connected to the connecting body 402 by a pin shaft, and the movable handle can move up and down relative to the connecting body 402 with the pin shaft as the center of the circle. The movable shaft 406 is provided inside the end of the handle body 404 away from the connecting piece, and the tail end of the hook 405 passes through the movable shaft 406 and is tightened. The hook 405 can move relative to the handle body 404 with the movable shaft 406 as the center of the circle to ensure that the head end of the hook 405 can smoothly enter the hook 405 hole 3 when the handle body 404 is lifted. The head end of the hook 405 is in a curved hook shape. When the handle body 404 is pressed down, the head end of the hook 405 can be hung and fixed at the hook hole 3. Specifically, the width of the end of the handle body 404 close to the connecting piece is set larger than the width of the front end of the clamp base 401. When the head end of the hook 405 is hooked on the hook hole 3 and the head end of the hook 405 is in contact with the surface of the first layer of screen 2 in the protective cover 202, when the handle body 404 is moved downward with the pin as the center of the circle, the end of the handle body 404 close to the connecting piece can be close to the front end outer surface of the clamp base 401, and the first layer of screen 2 is fastened to the inside of the vibration tank body 1, so as to achieve the purpose of self-locking. One side end of the connecting body 402 extends a distance in the direction of the movable axis 406 close to the movable handle, and the positioning pin hole 403 is opened on the surface of one side end of the connecting body 402 extending a distance. The spring positioning pin 407 can pass through the side end of the handle body 404 and align with the inside of the positioning pin hole 403. When the handle body 404 is close to the front end outer surface of the clamp base 401 to form a self-locking cooperation, the purpose of the double self-locking function of the quick-release clamp 4 is achieved.

[0018] Preferably, the layout position and the number of the quick-release clamps 4 are consistent with the distribution position and the number of the hook holes 3 .

[0019] The present invention also provides a method for using the vibrating conveying equipment screening device, which is applied to the above-mentioned vibrating conveying equipment screening device, and the specific steps include: Step S1: Install the screening device of the vibrating conveying equipment before vibrating and conveying materials. First, lift up the handle body 404 of the quick-install clamp 4 so that the head end of the hook 405 is taken out from the hook hole 3. Then, place the second layer of screen inside the vibration tank body 1, hold the fixed handle 203 of the first layer of screen 2 and place the first layer of screen 2 above the second layer of screen to ensure that the layout position of the protective cover 202 of the first layer of screen 2 corresponds to the opening position of the hook hole 3. Place the head end of the hook 405 in the hook hole 3 and press the handle body 404 downward so that the head end of the hook 405 The handle body 404 is in contact with the surface of the first layer of screen 2 in the protective cover 202, and the end of the handle body 404 close to the connecting piece can be in close contact with the front end outer surface of the clamp base 401. The first layer of screen 2 is fastened to the inside of the vibration tank body 1 to achieve the purpose of single self-locking. At this time, the head end of the hook 405 is fixed at the hook hole 3. Finally, the spring locating pin 407 that passes through the side end of the handle body 404 is aligned and inserted into the inside of the locating pin hole 403. Under the cooperation of the handle body 404 close to the front end outer surface of the clamp base 401 to form a single self-locking, the purpose of the double self-locking function of the quick-release clamp 4 is achieved; Step S2: When the material is vibrated and transported by the vibrating conveying device, the first layer of screen 2 laid from the feeding end of the vibration trough body 1 to the discharging end of the vibration trough body 1 is used to screen the material being vibrated and transported. In the material, large pieces of tobacco leaves pass through the upper surface of the first layer of screen 2 and enter the dropper provided at the rear end of the vibration conveying device to be cut into tobacco shreds by the shredder. Small tobacco leaves of 3-6 mm in size fall through the shell-shaped mesh 204 on the surface of the first layer of screen 2 and reach the surface of the second layer of screen. The second layer of screen screens screen out the broken pieces and tobacco soil with a size of less than 3 mm. Step S3: When disassembling and maintaining the screening device of the vibration conveying equipment, pull the spring locating pin 407 outward to disengage the locating pin hole 403, and at the same time, lift the handle body 404 upward to further separate the end of the handle body 404 close to the connecting piece from the front end outer surface of the clamp base 401, then take the head end of the hook 405 out of the hook hole 3, and hold the fixed handle 203 of the first layer of screen 2 to lift the first layer of screen 2 from the inside of the vibration trough body 1 and place it in the preset maintenance position, finally, perform maintenance operations on the inside of the vibration trough body 1, the first layer of screen and the first layer of screen 2.

[0020] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibrating conveying equipment screening device, characterized in that: It includes a screening component and a quick-release clamp for fastening the screening component, the screening component includes a vibration slot body and a screen set up inside the vibration slot body, the screen includes a first layer of screen and a second layer of screen located below the first layer of screen, the side wall surface of the vibration slot body is provided with a hook hole, the quick-release clamp fastens the first layer of screen to the inside of the vibration slot body through the hook hole, the first layer of screen is provided with a side guard plate, the surface of the side guard plate is provided with a protective cover, the top of the protective cover is provided with a fixed handle, the bottom end surface of the first layer of screen is evenly provided with a plurality of shell-shaped mesh holes, the quick-release clamp includes a clamp base arranged at the hook hole and a movable handle connected to the clamp base through a connector, the side end of the connector is provided with a positioning pin hole, the movable handle includes a handle body and a hook arranged inside the handle, and the side end of the handle body is penetrated by a spring positioning pin inserted into the positioning pin hole.

2. A vibrating conveying equipment screening device according to claim 1, characterized in that: The platform includes a first layer platform and a second layer platform located inside the first layer platform, the first layer of screen is set on the top of the first layer platform, the second layer of screen is set on the top of the second layer platform, and the setting height of the first layer platform is lower than the opening height of the hook hole to ensure that the quick-release clamp can contact the first layer of screen and smoothly fasten the first layer of screen to the top of the first layer platform inside the vibration tank body.

3. A vibrating conveying equipment screening device according to claim 1, characterized in that: The left and right ends of the first layer of screen are symmetrically provided with side guard plates. When the first layer of screen is placed inside the vibration tank body, the left and right side guard plates of the first layer of screen can respectively fit with the inner wall surface of the vibration tank body. The front and rear ends of the side guard plates are provided with protective covers with openings facing outward. The protective covers separate the surface of the first layer of screen into a working area for fastening the first layer of screen with a quick-release clamp. The top end of the fixed handle faces the inside of the first layer of screen. The first layer of screen can be quickly and effectively lifted and removed from the inside of the vibration tank body through the fixed handle.

4. A vibrating conveying equipment screening device according to claim 1, characterized in that: The surface of the first layer of screen is configured such that the opening direction of the shell-shaped mesh is consistent with the conveying direction of the material, which can prevent tobacco stems in the material from being inserted into the mesh during the vibration conveying process, causing the mesh to be blocked and thus reducing the screening capacity of the first layer of screen.

5. A vibrating conveying equipment screening device according to claim 1, characterized in that: The left and right ends of the clamp base are provided with threaded holes, and the clamp base is fixed to the bottom of the hook hole on the outer wall of the vibration groove body by bolts matching the threaded holes. The connecting body is fixedly connected to the surface of the clamp base, and the movable handle is movably connected to the connecting body by a pin shaft, and the movable handle can move up and down relative to the connecting body with the pin shaft as the center of the circle. A movable shaft is provided inside the end of the handle body away from the connecting piece, and the tail end of the hook passes through the movable shaft and is tightened, and the hook can move relative to the handle body with the movable shaft as the center of the circle. The head end of the hook is in the shape of a curved hook, and one side end of the connecting body extends a distance in the direction of the movable shaft close to the movable handle. The positioning pin hole is provided on the surface of one side end of the connecting body extending a distance, and the spring positioning pin can pass through the side end of the handle body and align with the inside of the positioning pin hole.

6. A method for using a vibrating conveying equipment screening device, the method being applied to a vibrating conveying equipment screening device as claimed in any one of claims 1 to 5, characterized in that: The specific steps include: Step S1: Install the screening device of the vibrating conveying equipment before vibrating and conveying materials. First, lift the handle body of the quick-release clamp upward so that the head end of the hook is taken out from the hook hole. Then, place the second layer of screen inside the vibration trough body. Hold the fixed handle of the first layer of screen and place the first layer of screen above the second layer of screen to ensure that the layout position of the protective cover of the first layer of screen corresponds to the opening position of the hook hole. Place the head end of the hook in the hook hole and press the handle body downward so that the head end of the hook contacts the surface of the first layer of screen in the protective cover. The end of the handle body close to the connecting piece can be close to the front end outer surface of the clamp base. The first layer of screen is fastened to the inside of the vibration trough body to achieve the purpose of single self-locking. At this time, the head end of the hook is fixed at the hook hole. Finally, align the spring locating pin that passes through the side end of the handle body with the inside of the locating pin hole. Under the cooperation of the handle body close to the front end outer surface of the clamp base to form a single self-locking, the purpose of the double self-locking function of the quick-release clamp is achieved. Step S2: When the material is vibrated and transported by the vibrating conveying device, the material is screened by the first layer of screen laid from the feeding end of the vibration trough body to the discharging end of the vibration trough body. Among the materials, large pieces of tobacco leaves pass through the upper surface of the first layer of screen and enter the dropper provided at the rear end of the vibration conveying device to be cut into tobacco shreds by the shredder. Small tobacco leaves with a size of 3-6 mm fall through the shell-shaped mesh holes on the surface of the first layer of screen and reach the surface of the second layer of screen. The second layer of screen screens screen out the broken pieces and tobacco soil with a size of less than 3 mm. Step S3: When disassembling and maintaining the screening device of the vibration conveying equipment, pull the spring locating pin outward to make the spring locating pin disengage from the locating pin hole, and at the same time lift the handle body upward to further separate the end of the handle body close to the connecting piece from the front outer surface of the clamp base, then take the head end of the hook out of the hook hole, hold the fixed handle of the first layer of screen, lift the first layer of screen from the inside of the vibration trough body and place it in the preset maintenance position, finally, perform maintenance operations on the inside of the vibration trough body, the first layer of screen and the first layer of screen.

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