A raw material screening device for processing degradable plastic film bags

Abstract

The invention discloses a raw material screening device for processing degradable plastic film bags, which relates to the technical field of processing degradable plastic film bags, and comprises a shell component, a quantity control component, an adjustment component and a screening component, wherein the quantity control component and the screening component are both arranged inside the shell component. After starting the servo motor, the two conveyor belts can be controlled to rotate synchronously inward or outward through the cooperation of the driving shaft, the first bevel gear, the second bevel gear, the first rotating shaft and the active roller, thereby controlling the falling speed of the degradable plastic film bag granular raw materials discharged from the sedimentation bucket, and after starting the cylinder in the adjustment component, the spacing under the two conveyor belts can be further adjusted with the cooperation of other structures, thereby further controlling the passing speed of the granular raw materials, thereby ensuring that the granular raw materials of the degradable plastic film bags pass through the screen plate at a reasonable speed and are screened, effectively improving the screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of processing degradable plastic film bags, in particular to a raw material screening device for processing degradable plastic film bags. Background Art

[0002] Degradable plastic film bags refer to plastic film bags that can decompose into environmentally harmless substances within a certain period of time through biodegradation, photodegradation, thermal oxidation degradation, etc. under specific environmental conditions, reducing pollution and damage to the soil, water sources and other environments. The raw materials can be made of different materials according to different plastic film bags. The raw materials are usually granular, and the size of the raw material particles is different, and their meltability and fluidity during processing are different. In order to improve the specificity, they are often classified according to the size of the raw material particles.

[0003] At present, when screening the raw materials of degradable plastic film bags, traditional screening devices mainly use vibration motors and internal screen plates to screen their sizes. However, when the raw materials are put in, the amount and speed of the raw materials cannot be controlled, resulting in a large amount of particles pouring into the screen plate at one time. Even if the screen plate is equipped with a vibration motor for oscillation, a large amount of accumulated degradable plastic film bag raw materials are difficult to pass through the screen plate quickly, resulting in low screening efficiency.

[0004] Therefore, we propose a raw material screening device for processing degradable plastic film bags in order to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a raw material screening device for processing degradable plastic film bags, so as to solve the problem that even if the screen plate in the existing screening device proposed in the above background technology is equipped with a vibration motor for oscillation, a large amount of accumulated degradable plastic film bag raw materials are difficult to pass through the screen plate quickly, resulting in low screening efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a raw material screening device for processing degradable plastic film bags, comprising a shell component, a quantity control component, an adjustment component and a screening component, wherein the quantity control component and the screening component are both arranged inside the shell component, and the shell component is used to support and install the quantity control component, the adjustment component and the screening component, and comprises a screening shell and a feeding shell, and the quantity control component is installed throughout the shell component, and is used to control the feeding speed of the raw materials for processing degradable plastic film bags, and comprises two active rollers, two driven rollers and a mounting plate, and the two active rollers are respectively connected to the outer surfaces of the two driven rollers with a conveyor belt, and the adjustment component is installed outside the shell component, and is used to adjust the distance between the two driven rollers, and comprises a cylinder and two plane gears, and the screening component is located below the quantity control component, and is used to classify the raw materials for processing degradable plastic film bags by size, and comprises a first screen plate.

[0007] Preferably, the lower material shell is formed by four rectangular plates connected by bolts, the screening shell is fixedly connected to the bottom of the lower material shell, the top of the lower material shell is equipped with a sedimentation bucket extending to the interior, a group of arc grooves are symmetrically opened on the front and rear outer surfaces of the lower material shell, and an appearance plate is pasted on the rear surface of the lower material shell for sealing the rear arc grooves.

[0008] Preferably, a first rotating shaft extending outward is fixedly connected to the inner axis of the active roller, a second rotating shaft extending outward is rotatably connected to the inner axis of the driven roller, a front end of the second rotating shaft is fixedly connected to an arc plate matching the arc groove, a second bevel gear is fixedly installed at the front end of the first rotating shaft, the two first rotating shafts are symmetrically rotatably installed between the front and rear inner walls of the unloading shell and the front ends extend to the outside, and the outer surface of the second rotating shaft slides in contact with the inner wall of the arc groove near the end.

[0009] Preferably, the mounting plate is fixedly connected to a position on the front surface of the discharge shell near the top, a fixing seat is symmetrically fixedly connected to the bottom of the mounting plate, drive shafts are rotatably connected to the outer surfaces of the two opposite sides of the two fixing seats, a crankshaft is fixedly connected between the ends of the two drive shafts, a servo motor is installed at the bottom of the mounting plate near the right edge, and two conveyor belts are both located inside the discharge shell, and the bottom of the conveyor belts is located below the bottom of the sedimentation bucket.

[0010] Preferably, the output end of the servo motor rotates through one of the fixed seats and is fixedly connected to the end of the right driving shaft, the outer surfaces of the two driving shafts are fixedly connected with first bevel gears and the two first bevel gears are arranged in opposite directions, and the first bevel gear and the second bevel gear are meshingly connected.

[0011] Preferably, the cylinder is fixedly mounted on the front surface of the unloading shell near the upper center, the two planar gears are respectively rotatably connected to the outer surfaces of the two first rotating shafts near the front ends, the output end of the cylinder is fixedly connected to a lifting plate, the outer surface of the lifting plate is symmetrically provided with inclined grooves, and the lifting plate is longitudinally slidably connected to the front surface of the unloading shell through a slide rail.

[0012] Preferably, the front surfaces of the two planar gears are fixedly connected with a support arm, and the support arm is bent to avoid the lifting plate. A rack is meshingly connected to the lower portion of the outer surface of the planar gear. The two racks are symmetrically slidably connected to the front surface of the unloading shell. The front surfaces of the two racks are fixedly connected with connecting columns near the inner side, and the connecting columns are slidably inserted into the inside of the inclined groove.

[0013] Preferably, a second discharge port is provided on the right surface of the screening shell near the top, a third discharge port is provided on the rear surface of the screening shell, and a first discharge port is provided on the left surface of the screening shell, the third discharge port is located below the first discharge port, and the first discharge port is located below the second discharge port.

[0014] Preferably, the bottom of the first sieve plate is fixedly connected with connecting rods near the four corners, a third sieve plate is fixedly connected between the bottom ends of the four connecting rods, a second sieve plate is fixedly connected between the outer surfaces of the four connecting rods near the middle, the first sieve plate is inclined to the right and has a plurality of first sieve holes arranged on its surface, the second sieve plate is inclined to the left and has a plurality of second sieve holes arranged on its surface, the third sieve plate is inclined backward and has a plurality of third sieve holes arranged on its surface, and the outer surfaces of the first sieve plate, the second sieve plate and the third sieve plate are slidably fitted with the inner surface wall of the sieving shell.

[0015] Preferably, a connecting plate is embedded and fixed between the front surfaces of the first sieve plate, the second sieve plate and the third sieve plate, and the front surface of the connecting plate is symmetrically fixedly connected with an extension arm, and the extension arm slides through the screening shell and extends to the outside, and a circular shaft is fixedly connected between the outer surfaces of the two extension arms near the front end, and the outer surface of the circular shaft is rotatably connected with a connecting rod, and the top end of the connecting rod is rotatably connected to the crankshaft.

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

[0017] 1. When the present invention is used, after starting the servo motor, the two conveyor belts can be controlled to rotate synchronously inward or outward through the cooperation of the driving shaft, the first bevel gear, the second bevel gear, the first rotating shaft and the active roller, thereby controlling the falling speed of the degradable plastic film bag granular raw materials discharged from the sedimentation bucket, and after starting the cylinder in the adjustment component, the spacing under the two conveyor belts can be further adjusted with the cooperation of other structures, thereby further controlling the passing speed of the granular raw materials, thereby ensuring that the granular raw materials of the degradable plastic film bags pass through the screen plate at a reasonable speed and are screened, effectively improving the screening efficiency.

[0018] 2. When the present invention is used, during use, the granular raw material enters the interior of the screening shell through the discharge shell, first, the granular raw material will fall onto the first sieve plate, slide to the right under the action of gravity, and finally be discharged from the second discharge port on the right side of the screening shell, during this period, the granular raw material with a particle size smaller than the first sieve hole will fall downward to the top of the second sieve plate, and then be discharged from the first discharge port on the left side of the screening shell, and the granular raw material with a particle size smaller than the second sieve hole will continue to fall onto the third sieve plate, and be discharged through the third discharge port on the rear side of the screening shell, at the same time, some dust and impurities adhered to the surface of the raw material will be discharged from the bottom of the screening shell through the third sieve hole, the screening component has a simple structure, can finely classify the degradable plastic film bag raw materials, and its design of discharging in three directions greatly facilitates the subsequent collection operation, and the use effect is quite significant.

[0019] 3. When the present invention is used, during the movement of the device, the servo motor will always drive the drive shaft to rotate after it is started, so the crankshaft connecting the two drive shafts will also keep rotating. During the rotation, the crankshaft will drive the top of the connecting rod to continuously perform circular motion through the journal, so that the overall height of the connecting rod is constantly changing, and its bottom end will continuously drive the connecting plate and the first sieve plate, the second sieve plate and the third sieve plate to do up and down reciprocating motion through the cooperation of the circular shaft and the extension arm. In this way, the granular raw materials on the top of the first sieve plate, the second sieve plate and the third sieve plate are unlikely to get stuck, and no additional power source is required. While improving the overall use effect of the device, the cost is controlled and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a raw material screening device for processing degradable plastic film bags of the present invention;

[0021] Figure 2 This is a rear view of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0022] Figure 3 This is an expanded view of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a shell component of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0024] Figure 5 This is a schematic diagram of the connection of a quantity control component, an adjustment component and a screening component of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0025] Figure 6 This is a schematic diagram of the connection between the quantity control component and the regulating component of a raw material screening device for processing degradable plastic film bags of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of a quantity control component of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of an adjustment component of a raw material screening device for processing degradable plastic film bags according to the present invention;

[0028] Fig. 9 The present invention is a schematic diagram of the structure of a screening component of a raw material screening device for processing degradable plastic film bags.

[0029] In the figure: 1. Shell assembly; 101. Screening shell; 102. First discharge port; 103. Second discharge port; 104. Third discharge port; 105. Discharge shell; 106. Arc groove; 107. Appearance plate; 108. Sedimentation bucket; 2. Quantity control assembly; 201. Mounting plate; 202. Fixing seat; 203. Drive shaft; 204. Crankshaft; 205. First bevel gear; 206. Servo motor; 207. First rotating shaft; 208. Active roller; 209. Second rotating shaft; 210. Driven roller; 211. Arc plate ; 212, conveyor belt; 213, second bevel gear; 3, adjustment assembly; 301, cylinder; 302, lifting plate; 303, inclined groove; 304, plane gear; 305, rack; 306, connecting column; 307, support arm; 4, screening assembly; 401, first screen plate; 402, first screen hole; 403, second screen plate; 404, second screen hole; 405, third screen plate; 406, third screen hole; 407, connecting plate; 408, extension arm; 409, circular shaft; 410, connecting rod; 411, connecting rod. DETAILED DESCRIPTION

[0030] 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 implementation regulations described 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.

[0031] Example 1: Please refer to Figure 1 - Fig. 9As shown, the present invention provides a technical solution: a raw material screening device for processing degradable plastic film bags, comprising a shell component 1, a quantity control component 2, an adjustment component 3 and a screening component 4, the quantity control component 2 and the screening component 4 are both arranged inside the shell component 1, the shell component 1 is used to support and install the quantity control component 2, the adjustment component 3 and the screening component 4, including a screening shell 101 and a feeding shell 105, the quantity control component 2 is installed throughout the shell component 1, and is used to control the feeding speed of the raw material for processing degradable plastic film bags, including two active rollers 208, two driven rollers 210 and a mounting plate 201, the two active rollers 208 are respectively connected to the outer surfaces of the two driven rollers 210 with a conveyor belt 21 2. The adjustment component 3 is installed on the outside of the housing component 1, and is used to adjust the distance between the two driven rollers 210, including a cylinder 301 and two flat gears 304. The screening component 4 is located below the control component 2, and is used to classify the degradable plastic film bag processing raw materials by size, including a first screen plate 401. The material discharge shell 105 is formed by four rectangular plates connected by bolts. The screening shell 101 is fixedly connected to the bottom of the material discharge shell 105. The top of the material discharge shell 105 is equipped with a sedimentation bucket 108 extending to the inside. The front and rear outer surfaces of the material discharge shell 105 are symmetrically penetrated with a group of arc grooves 106. The rear surface of the material discharge shell 105 is pasted with an appearance plate 107 for sealing the rear arc groove 106. The active roller 208 A first rotating shaft 207 extending outward is fixedly connected at the inner axis of the driven roller 210, a second rotating shaft 209 extending outward is rotatably connected at the inner axis of the driven roller 210, an arc plate 211 matching the arc groove 106 is fixedly connected at the front end of the second rotating shaft 209, a second bevel gear 213 is fixedly installed at the front end of the first rotating shaft 207, the two first rotating shafts 207 are symmetrically rotatably installed between the front and rear inner walls of the discharge shell 105 and the front ends extend to the outside, the outer surface of the second rotating shaft 209 is slidably fitted with the inner wall of the arc groove 106 near the end, the mounting plate 201 is fixedly connected to the front surface of the discharge shell 105 near the top, and the bottom of the mounting plate 201 is symmetrically fixedly connected with a fixing seat 202, the outer surfaces of the opposite sides of the two fixed seats 202 are rotatably connected with the drive shaft 203, and the ends of the two drive shafts 203 are fixedly connected with a crankshaft 204, and the bottom of the mounting plate 201 is installed with a servo motor 206 near the right edge, and the two conveyor belts 212 are located inside the discharge shell 105, and the bottom of the conveyor belt 212 is located below the bottom of the sedimentation bucket 108. The output end of the servo motor 206 rotates through one of the fixed seats 202 and is fixedly connected to the end of the right drive shaft 203, and the outer surfaces of the two drive shafts 203 are fixedly connected with the first bevel gears 205, and the two first bevel gears 205 are set in opposite directions, and the first bevel gear 205 and the second bevel gear 213 are meshed and connected.

[0032] In the present embodiment, the screening shell 101 and the discharge shell 105 form a closed screening device shell, and the sedimentation bucket 108 sinks into the interior of the discharge shell 105, and is wide at the top and narrow at the bottom, so as to accommodate the poured degradable plastic film bag raw material and discharge it to the middle position inside the discharge shell 105. When in use, the degradable plastic film bag raw material is poured into the sedimentation bucket 108. Under the action of gravity, the granular raw material will fall downward and fall from the gap under the two feeding belts 212 into the interior of the screening shell 101 for screening. In this process, the falling speed and falling amount of the granular raw material can be judged whether they are appropriate according to the discharge amount and discharge speed of the first discharge port 102, the second discharge port 103 and the third discharge port 104, and the process can be Start the servo motor 206 to drive the drive shaft 203 to rotate forward. At this time, the first bevel gear 205 on the surface of the drive shaft 203 will drive the second bevel gear 213, the first rotating shaft 207 and the active roller 208 that are meshed therewith to rotate forward. At this time, the conveyor belt 212 mounted on the surface of the active roller 208 and the driven roller 210 will rotate forward under the action of friction. At the same time, the granular raw materials attached to the conveyor belt 212 will be quickly transported downward. Conversely, starting the servo motor 206 to rotate in the opposite direction can control the conveyor belt 212 to rotate in the opposite direction and transport the granular raw materials upward, thereby slowing down the falling speed and discharge amount of the granular raw materials, thereby ensuring that the granular raw materials in the degradable plastic film bags pass through the screen plate and are screened at a reasonable speed, thereby effectively improving the screening efficiency.

[0033] Embodiment 2: Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the cylinder 301 is fixedly installed on the front surface of the discharge shell 105 near the upper center, and the two planar gears 304 are respectively rotatably connected to the outer surfaces of the two first rotating shafts 207 near the front end. The output end of the cylinder 301 is fixedly connected to a lifting plate 302, and the outer surface of the lifting plate 302 is symmetrically provided with inclined grooves 303. The lifting plate 302 is longitudinally slidably connected to the front surface of the discharge shell 105 through a slide rail. The front surfaces of the two planar gears 304 are fixedly connected to support arms 307, and the support arms 307 are bent to avoid the lifting plates 302. The lower part of the outer surface of the planar gears 304 is meshedly connected with racks 305, and the two racks 305 are symmetrically slidably connected to the front surface of the discharge shell 105. The front surfaces of the two racks 305 are fixedly connected to connecting columns 306 near the inner sides, and the connecting columns 306 are slidably inserted into the inside of the inclined grooves 303.

[0034] In this embodiment, when the overall particle size of the raw material particles of the degradable plastic film bag is small or large and the falling speed needs to be further controlled, the lifting plate 302 can be driven to move up and down by starting the cylinder 301. When the lifting plate 302 is lifted or lowered, the inclined groove 303 on its surface will generate a push-pull force on the connecting column 306 on the front side of the rack 305 to cause the two racks 305 to move in opposite directions. When the two racks 305 move away from each other, the plane gear 304 meshing with them will be driven to rotate inwards during the process. At the same time, the arm 307 will pass through the arc plate 21 1 drives the second rotating shaft 209 and the driven roller 210 to rotate outward with the plane gear 304 as the center. At this time, the two driven rollers 210 move away from each other to increase the distance between the two conveyor belts 212, thereby allowing the granular raw materials to pass quickly. Otherwise, the passing speed of the granular raw materials can be further reduced. The design structure is reasonable and can effectively control the speed at which the granular raw materials with larger or smaller particle sizes fall onto the surface of the screen plate, thereby ensuring the screening efficiency. The arc plate 211 is mainly used to block the arc groove 106 exposed after the two driven rollers 210 move away from each other.

[0035] Embodiment 3: Figure 1 - Figure 4 and Figure 6 As shown, a second discharge port 103 is provided on the right surface of the screening shell 101 near the top, a third discharge port 104 is provided on the rear surface of the screening shell 101, a first discharge port 102 is provided on the left surface of the screening shell 101, the third discharge port 104 is located below the first discharge port 102, the first discharge port 102 is located below the second discharge port 103, the bottom of the first sieve plate 401 near the four corners is fixedly connected with connecting rods 411, the third sieve plate 405 is fixedly connected between the bottom ends of the four connecting rods 411, the second sieve plate 403 is fixedly connected near the middle between the outer surfaces of the four connecting rods 411, the first sieve plate 401 is inclined to the right and has a plurality of first sieve holes 402 arranged on the surface, and the second sieve plate 403 is inclined to the left The third sieve plate 405 is tilted backward and has multiple third sieve holes 406 arranged on the surface. The outer surfaces of the first sieve plate 401, the second sieve plate 403 and the third sieve plate 405 are slidably fitted with the inner surface wall of the sieving shell 101. A connecting plate 407 is embedded and fixed between the front surfaces of the first sieve plate 401, the second sieve plate 403 and the third sieve plate 405. The front surface of the connecting plate 407 is symmetrically fixedly connected with an extension arm 408, and the extension arm 408 slides through the sieving shell 101 and extends to the outside. A circular shaft 409 is fixedly connected between the outer surfaces of the two extension arms 408 near the front end. The outer surface of the circular shaft 409 is rotatably connected with a connecting rod 410, and the top of the connecting rod 410 is rotatably connected to the crankshaft 204.

[0036] In the present embodiment, during use, after the granular raw material falls into the interior of the screening shell 101 through the discharge shell 105, it will first fall onto the first sieve plate 401, and slide to the right under the action of gravity, and finally pass through the second discharge port 103 and be discharged from the right side of the screening shell 101. During the process, the granular raw material with a particle size smaller than the first sieve hole 402 will fall downward to the top of the second sieve plate 403 and then be discharged from the left side of the screening shell 101 through the first discharge port 102. During the process, the granular raw material with a particle size smaller than the second sieve hole 404 will continue to fall onto the third sieve plate 405, and be discharged from the rear side of the screening shell 101 through the third discharge port 104, while a part of the dust and impurities adhered to the surface of the raw material will pass through the third sieve hole 406 and be discharged from the bottom of the screening shell 101. The screening component 4 has a simple structure, can finely classify the degradable plastic film bag raw materials, and discharge materials in three directions. The design also facilitates subsequent collection operations and has a high use effect. During the movement of the device, the servo motor 206 will always drive the drive shaft 203 to rotate after it is started. Therefore, the crankshaft 204 connecting the two drive shafts 203 will also maintain a rotating state. During the rotation, the crankshaft 204 will drive the top of the connecting rod 410 to continuously perform circular motion through the journal. Therefore, the overall height of the connecting rod 410 will continue to change. Its bottom end will continue to drive the connecting plate 407 and the first sieve plate 401, the second sieve plate 403 and the third sieve plate 405 to perform up and down reciprocating motion through the circular shaft 409 and the extension arm 408, thereby making it difficult for the granular raw materials on the top of the first sieve plate 401, the second sieve plate 403 and the third sieve plate 405 to get stuck, and no additional power source is required, which improves the overall use effect of the device while controlling the cost and has high practicality.

[0037] The effect and working principle achieved by the entire mechanism are as follows: when in use, the degradable plastic film bag raw material is poured into the sedimentation bucket 108. Under the action of gravity, the granular raw material falls downward and falls into the screening shell 101 from the gap under the two feeding belts 212 for screening. In this process, the falling speed and falling amount of the granular raw material can be judged to be appropriate based on the discharge amount and discharge speed of the first discharge port 102, the second discharge port 103 and the third discharge port 104. At the same time, if adjustment is required, the servo motor 206 can be started. When the servo motor 206 drives the driving shaft 203 to rotate forward, the first bevel gear 205 on the surface of the driving shaft 203 will cause the second bevel gear 213, the first rotating shaft 207 and the active roller 208 meshing therewith to rotate forward. When the servo motor 206 is turned in the opposite direction, the conveyor belt 212 provided on the surface of the active roller 208 and the driven roller 210 rotates forwardly under the action of friction, and the granular raw materials in contact with the conveyor belt 212 are quickly transported downward. On the contrary, the servo motor 206 is started to rotate in the opposite direction, so that the conveyor belt 212 can be controlled to rotate in the opposite direction to transport the granular raw materials upward, thereby slowing down the falling speed and the amount of the granular raw materials. In this way, it can be ensured that the granular raw materials of the degradable plastic film bag pass through the screen plate and are screened at a reasonable speed, thereby effectively improving the screening efficiency. In addition, when the overall particle size of the raw material particles of the degradable plastic film bag is small or large and the falling speed needs to be further controlled, the cylinder 301 can be started to drive the lifting plate 302 to move up and down. When the lifting plate 302 is raised or lowered, the inclined groove 303 on its surface will contact the front side of the rack 305. The connecting column 306 generates a push-pull force, which causes the two racks 305 to move in opposite directions. When the two racks 305 move away from each other, the meshing plane gear 304 will be driven to rotate inward. At the same time, the arm 307 will drive the second rotating shaft 209 and the driven roller 210 to rotate outward with the plane gear 304 as the center through the arc plate 211. At this time, after the two driven rollers 210 move away from each other, they play a role in increasing the distance between the two conveyor belts 212, thereby allowing the granular raw materials to pass quickly. On the contrary, the passing speed of the granular raw materials can be further reduced. The design structure is reasonable and can effectively control the speed at which granular raw materials with larger or smaller particle sizes fall onto the surface of the screen plate, thereby ensuring the screening efficiency. When in use, the granular raw materials fall into the screen through the lower shell 105. After entering the separation shell 101, it will first fall onto the first sieve plate 401, slide to the right under the action of gravity, and finally be discharged from the right side of the screening shell 101 through the second discharge port 103. During this process, the granular raw materials with a particle size smaller than the first sieve hole 402 will fall downward to the top of the second sieve plate 403, and then be discharged from the left side of the screening shell 101 through the first discharge port 102, while the granular raw materials with a particle size smaller than the second sieve hole 404 will continue to fall onto the third sieve plate 405, and be discharged from the rear side of the screening shell 101 through the third discharge port 104. At the same time, a part of the dust and impurities adhered to the surface of the raw materials will be discharged from the bottom of the screening shell 101 through the third sieve hole 406. The screening component 4 has a simple structure and can finely classify the degradable plastic film bag raw materials.The design of discharging materials in three directions facilitates subsequent collection operations and has a high use effect. During the movement of the device, the servo motor 206 will always drive the drive shaft 203 to rotate after it is started, so the crankshaft 204 connecting the two drive shafts 203 will also keep rotating. During the rotation process, the crankshaft 204 will drive the top of the connecting rod 410 to continuously perform circular motion through the journal, so that the overall height of the connecting rod 410 continues to change. Its bottom end will continuously drive the connecting plate 407 and the first screen plate 401, the second screen plate 403 and the third screen plate 405 to perform up and down reciprocating motion through the cooperation of the circular shaft 409 and the extension arm 408. In this way, the granular raw materials on the top of the first screen plate 401, the second screen plate 403 and the third screen plate 405 are unlikely to get stuck, and no additional power source is required. While improving the overall use effect of the device, the cost is controlled and the practicability is high.

[0038] 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 raw material screening device for processing degradable plastic film bags, comprising a housing component (1), a quantity control component (2), an adjustment component (3) and a screening component (4), wherein the quantity control component (2) and the screening component (4) are both arranged inside the housing component (1), and characterized in that: The housing component (1) is used for supporting and installing the quantity control component (2), the adjustment component (3) and the screening component (4), and comprises a screening shell (101) and a material discharge shell (105); the quantity control component (2) is installed throughout the housing component (1) and is used for controlling the material discharge speed of the degradable plastic film bag processing raw material, and comprises two active rollers (208), two driven rollers (210) and a mounting plate (201), and the two active rollers (208) are respectively connected to the outer surfaces of the two driven rollers (210) by a conveyor belt (212); the adjustment component (3) is installed outside the housing component (1) and is used for adjusting the distance between the two driven rollers (210), and comprises a cylinder (301) and two plane gears (304); the screening component (4) is located below the quantity control component (2) and is used for classifying the degradable plastic film bag processing raw material by size, and comprises a first screening plate (401); The material lowering shell (105) is formed by four rectangular plates connected by bolts, the screening shell (101) is fixedly connected to the bottom of the material lowering shell (105), a sedimentation bucket (108) extending to the inside is installed on the top of the material lowering shell (105), a group of arc grooves (106) are symmetrically opened on the front and rear outer surfaces of the material lowering shell (105), and an appearance plate (107) is attached to the rear surface of the material lowering shell (105) for sealing the rear arc groove (106); A first rotating shaft (207) extending outward is fixedly connected at the inner axis of the active roller (208), a second rotating shaft (209) extending outward is rotatably connected at the inner axis of the driven roller (210), a front end of the second rotating shaft (209) is fixedly connected to an arc plate (211) matching the arc groove (106), a second bevel gear (213) is fixedly installed at the front end of the first rotating shaft (207), the two first rotating shafts (207) are symmetrically rotatably installed between the front and rear inner surface walls of the discharge shell (105) and the front ends extend to the outside, and the outer surface of the second rotating shaft (209) near the end is slidably fitted with the inner surface wall of the arc groove (106); The mounting plate (201) is fixedly connected to a position near the top of the front surface of the material discharge shell (105); a fixing seat (202) is symmetrically fixedly connected to the bottom of the mounting plate (201); the outer surfaces of the opposite sides of the two fixing seats (202) are rotatably connected to drive shafts (203); a crankshaft (204) is fixedly connected between the ends of the two drive shafts (203); a servo motor (206) is installed near the right edge of the bottom of the mounting plate (201); the two conveyor belts (212) are both located inside the material discharge shell (105), and the bottom of the conveyor belts (212) is located below the bottom of the sedimentation bucket (108); The output end of the servo motor (206) rotates through one of the fixed seats (202) and is fixedly connected to the end of the right drive shaft (203); the outer surfaces of the two drive shafts (203) are fixedly connected to first bevel gears (205), and the two first bevel gears (205) are arranged in opposite directions; the first bevel gear (205) is meshedly connected to the second bevel gear (213); The cylinder (301) is fixedly mounted on the front surface of the material discharging shell (105) near the upper center, the two plane gears (304) are rotatably connected to the outer surfaces of the two first rotating shafts (207) near the front ends, and the output end of the cylinder (301) is fixedly connected to a lifting plate (302), the outer surface of the lifting plate (302) is symmetrically provided with inclined grooves (303), and the lifting plate (302) is longitudinally slidably connected to the front surface of the material discharging shell (105) via a slide rail; The front surfaces of the two planar gears (304) are fixedly connected with a support arm (307), the support arm (307) is bent and used to avoid the lifting plate (302), and a rack (305) is meshingly connected below the outer surface of the planar gear (304), and the two racks (305) are symmetrically slidably connected to the front surface of the discharge shell (105), and the front surfaces of the two racks (305) are fixedly connected with a connecting column (306) near the inner side, and the connecting column (306) is slidably inserted into the inside of the inclined groove (303); A second material discharge opening (103) is provided on the right surface of the screening shell (101) near the top, a third material discharge opening (104) is provided on the rear surface of the screening shell (101), a first material discharge opening (102) is provided on the left surface of the screening shell (101), the third material discharge opening (104) is located below the first material discharge opening (102), and the first material discharge opening (102) is located below the second material discharge opening (103); The bottom of the first sieve plate (401) is fixedly connected to connecting rods (411) at positions near four corners, a third sieve plate (405) is fixedly connected between the bottom ends of the four connecting rods (411), and a second sieve plate (403) is fixedly connected to the outer surfaces of the four connecting rods (411) at positions near the middle, the first sieve plate (401) is inclined to the right and has a plurality of first sieve holes (402) arranged on its surface, the second sieve plate (403) is inclined to the left and has a plurality of second sieve holes (404) arranged on its surface, the third sieve plate (405) is inclined backward and has a plurality of third sieve holes (406) arranged on its surface, and the outer surfaces of the first sieve plate (401), the second sieve plate (403) and the third sieve plate (405) are slidably fitted to the inner surface wall of the sieving shell (101); A connecting plate (407) is embedded and fixed between the front surfaces of the first sieve plate (401), the second sieve plate (403) and the third sieve plate (405); an extension arm (408) is symmetrically fixedly connected to the front surface of the connecting plate (407); the extension arm (408) slides through the sieve shell (101) and extends to the outside; a circular shaft (409) is fixedly connected between the outer surfaces of the two extension arms (408) at a position close to the front end; a connecting rod (410) is rotatably connected to the outer surface of the circular shaft (409); and the top end of the connecting rod (410) is rotatably connected to the crankshaft (204).

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