Raw material multi-stage screening device for plastic woven bag production
Through a multi-stage screening device combining wind power and strike structure with wind wheel and rotary wheel, the problem of particles floating in plastic particles screening is solved, and more efficient screening effect and lower dust pollution are achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202510616451.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-07-25
AI Technical Summary
During the screening process of existing plastic particles, light and tiny particles are prone to drift under frequent vibration of the screen, resulting in a decrease in screening efficiency and accuracy.
The wind wheel and the rotary wheel are combined with wind force and strike structure to achieve dynamic pressing deformation and reset of the screen, and combined with the multi-stage screen plate design, the wind force and mechanical vibration are used to achieve uniform distribution and rearrangement of particles to avoid particles floating.
It improves the uniformity and accuracy of screening, enhances the screening rate, reduces dust pollution, reduces labor intensity and improves production efficiency.
Smart Images
Figure CN120363364A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of screening, and particularly relates to a multi-stage screening device for raw materials used in the production of plastic woven bags. Background Art
[0002] The main raw materials of plastic woven bags are chemical plastic raw materials such as polyethylene (PE) and polypropylene (PP). These raw materials are extruded and stretched into flat filaments, and then made into finished products through processes such as weaving, knitting, and bag making. During the production process, additives such as calcium masterbatch can be added as needed to improve the performance of the woven bags, such as increasing the stiffness or softness. In the production process of plastic woven bags, the screening of raw materials is a crucial link. The particle size of the raw materials directly affects the subsequent production process and product quality;
[0003] In the existing screening process of plastic particles, the method of using motor vibration in cooperation with a filter screen is usually adopted to screen particles of different diameters. Since plastic particles are light in texture, tiny particles often easily obtain kinetic energy under the frequent vibration of the screen, thus drifting to the upper area of the screen. This not only reduces the screening efficiency of the screen but also may lead to a decrease in the accuracy of the screening results. Therefore, the present invention provides a multi-stage screening device for raw materials used in the production of plastic woven bags to meet the requirements. Summary of the Invention
[0004] To solve the above technical problems, the present invention provides the following technical solutions:
[0005] A multi-stage screening device for raw materials used in the production of plastic woven bags, including a device main body, a top cover is screwed to the top of the device main body, a feed bin is fixedly connected to one side of the top of the top cover, a side box is screwed to the outside of the device main body, a blower is fixedly connected to the front of the side box, a dust collection box is slidably connected to the outside of the device main body, a first blanking frame is fixedly connected to the outside of the device main body, and a second blanking frame is fixedly connected to the bottom of the device main body; a screening component, which is used for the coarse and fine screening of plastic particles, and the screening component is connected to the device main body.
[0006] Optionally, the screening component includes a first sieve plate and a second sieve plate fixedly connected to the inner wall of the device main body. The first sieve plate includes two first fixing strips fixedly connected to both sides of the inner cavity of the device main body. The same-direction ends of the two first fixing strips are fixedly connected through a first deformation strip. The outside of the two first deformation strips is attached to the inner wall of the device main body. A first sieve mesh main body is fixedly connected inside the square frame formed by the two first fixing strips and the two first deformation strips.
[0007] Optionally, a support inclined plate is fixedly connected to the bottom of one side of the inner cavity of the device main body. The two ends of the second sieve plate are respectively fixedly connected to the top of the support inclined plate and one side of the inner cavity of the device main body through two second fixing strips. The same-direction ends of the two second fixing strips are fixedly connected through second deformation strips. The outer parts of the two second deformation strips are attached to the inner wall of the device main body. A second sieve mesh main body is fixedly connected inside the square frame formed by the two second deformation strips and the two second fixing strips. One side of the bottom of the first deformation strip is provided with a first convex part, and one side of the top of the second deformation strip is provided with a second convex part. The cross-sectional shapes of the first sieve mesh main body and the second sieve mesh main body are the same as those of the first deformation strip and the second deformation strip respectively. The pore diameter value of the second sieve mesh main body is smaller than that of the first sieve mesh main body.
[0008] Optionally, a drainage channel is fixedly connected inside the side box. The drainage channel includes an arc-shaped guiding frame. An inner channel is opened inside the guiding frame. The inner channel is fixedly communicated with the fan. Arc-shaped drainage baffles are symmetrically fixedly connected to the top and bottom of the inner cavity of the inner channel. The other end of the guiding frame is provided with an air outlet with an opening facing above the second sieve plate.
[0009] Optionally, connecting shafts are fixedly connected to both sides of the inner cavity of the device main body. The ends of the connecting shafts are rotatably connected with wind wheels. A plurality of blades are annularly fixedly connected to the outer ring of the wind wheels. A driving wheel is fixedly connected to the back of the wind wheel. A transmission belt is sleeved outside the driving wheel.
[0010] Optionally, the blades are integrally arc-shaped, and the cross-section of the blades is in a "C" shape. A cavity is opened inside the blades. The cavity is located on the exhaust path of the air outlet. A baffle is fixedly connected to the blades at a position two centimeters away from the open end.
[0011] Optionally, fixing columns are fixedly connected to the inner parts of both sides of the inner cavity of the device main body. An equilateral triangle rotating wheel is rotatably connected to the outside of the fixing columns. A driven wheel is fixedly connected to the front of the equilateral triangle rotating wheel. The driven wheel is in transmission connection with the driving wheel through a transmission belt. Knocking pieces are fixedly connected to the three vertices of the triangular plate.
[0012] Optionally, the knocking piece is in the shape of a "C" - shaped member with an opening facing the equilateral triangle rotating wheel. The axis of the fixing column is located at the midpoint of the connecting line of the protruding parts of the first convex part and the second convex part.
[0013] Optionally, the bottom of the dust collection box is attached to the top of the support inclined plate. The dust collection box is located directly below the second sieve plate. The first blanking frame is located on one side of the first sieve plate. A blanking channel is formed between the drainage channel and the bottom end of the second sieve mesh main body. The second blanking frame is located directly below the blanking channel.
[0014] Optionally, four support frames are fixedly connected to both sides outside the device body, and a rigid spring is provided at the center of each support frame.
[0015] Compared with the prior art, the present invention has at least the following beneficial effects:
[0016] In the above solution, by setting the wind wheel and the rotating wheel, the dynamic pressing deformation and reset of the sieve mesh are realized by using wind power. This process helps the uniform distribution and rearrangement of granular materials on the sieve mesh, thereby improving the uniformity and accuracy of screening. The regular deformation and reset can not only improve the screening rate, but also avoid the problem of fine particles floating caused by frequent vibration in the prior art, and thus improve the screening rate of the device;
[0017] In the above solution, by setting the stop block, when the air flow blows towards the wind wheel, the cavity can guide the air flow to push the wind wheel, and the stop block can limit the force exerted by the air flow on the wind wheel. Using the principle of the lever, the air flow can more easily push the wind wheel to rotate. At the same time, the air flow cooperates with the second sieve plate to realize the further fine screening of the plastic particles after the primary screening, further improving the screening effect;
[0018] In the above solution, the knocking member can not only realize the uniform distribution and rearrangement of granular materials on the sieve mesh. Since the concave direction of the first sieve mesh body faces upward of the first blanking frame, when the first sieve mesh body deforms and resets each time, the materials at the top will move a certain distance towards the first blanking frame, and thus the blanking rate of the device can be improved without affecting the screening rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.
[0020] Figure 1 It is a three-dimensional structural schematic diagram of a multi-stage screening device for raw materials used in plastic woven bag production;
[0021] Figure 2 It is a three-dimensional structural schematic diagram of the cooperation of the multi-stage screening device;
[0022] Figure 3 It is a partial cross-sectional view of the multi-stage screening device;
[0023] Figure 4 It is a partial cross-sectional view of the multi-stage screening device;
[0024] Figure 5 For Figure 4 the enlarged schematic diagram at the position of;
[0025] Figure 6 Schematic diagram of the mating three-dimensional structure of the wind wheel;
[0026] Figure 7 Partial sectional view of the wind wheel;
[0027] Figure 8 Schematic diagram of the mating structure of the sieve plate.
[0028] [Reference numerals]
[0029] 1. Device main body; 2. Top cover; 3. Feed bin; 4. First blanking frame; 5. Second blanking frame; 6. Dust collection box; 7. Side box; 8. Fan; 9. Support frame; 10. Drainage channel; 1001. Guide frame; 1002. Inner channel; 1003. Baffle; 1004. Air outlet; 11. Wind wheel; 1101. Connecting shaft; 1102. Blades; 1103. Cavity; 1104. Stopper; 12. First sieve plate; 1201. First fixing strip; 1202. First deformation strip; 1203. First sieve mesh main body; 1204. First convex part; 13. Second sieve plate; 1301. Second fixing strip; 1302. Second deformation strip; 1303. Second sieve mesh main body; 1304. Second convex part; 14. Support inclined plate; 15. Rotating wheel; 1501. Knocking piece; 1502. Fixed column; 16. Transmission belt.
[0030] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners
[0031] The following will describe in detail a multi-stage screening device for raw materials used in the production of plastic woven bags provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.
[0032] It should be noted that in the specification, "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiment may include specific features, structures or characteristics, but not necessarily every embodiment includes this specific feature, structure or characteristic. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, implementing such a feature, structure or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.
[0033] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, can alternatively, depending at least in part on the context, allow for the presence of other factors that are not necessarily expressly described.
[0034] It will be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.
[0035] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as illustrated in the figures. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted accordingly.
[0036] As Figures 1 to 8As shown in the figure, an embodiment of the present invention provides a multi-stage screening device for raw materials used in the production of plastic woven bags, including a device main body 1. A top cover 2 is screwed to the top of the device main body 1. One side of the top of the top cover 2 is fixedly connected with a feed bin 3. A side box 7 is screwed to the outside of the device main body 1. A blower 8 is fixedly connected to the front of the side box 7. A dust collection box 6 is slidably connected to the outside of the device main body 1. A first blanking frame 4 is fixedly connected to the outside of the device main body 1. A second blanking frame 5 is fixedly connected to the bottom of the device main body 1. A screening assembly is used for the coarse and fine screening of plastic particles. The screening assembly is connected to the device main body 1. The screening assembly includes a first sieve plate 12 and a second sieve plate 13 fixedly connected to the inner wall of the device main body 1. The first sieve plate 12 includes two first fixing strips 1201 fixedly connected to both sides of the inner cavity of the device main body 1. The same-direction ends of the two first fixing strips 1201 are fixedly connected through a first deformation strip 1202. The outside of the two first deformation strips 1202 is attached to the inner wall of the device main body 1. A first sieve mesh body 1203 is fixedly connected inside the square frame formed by the two first fixing strips 1201 and the two first deformation strips 1202. A support inclined plate 14 is fixedly connected to the bottom of one side of the inner cavity of the device main body 1. The two ends of the second sieve plate 13 are respectively fixedly connected to the top of the support inclined plate 14 and one side of the inner cavity of the device main body 1 through two second fixing strips 1301. The same-direction ends of the two second fixing strips 1301 are fixedly connected through a second deformation strip 1302. The outside of the two second deformation strips 1302 is attached to the inner wall of the device main body 1. A second sieve mesh body 1303 is fixedly connected inside the square frame formed by the two second deformation strips 1302 and the two second fixing strips 1301. One side of the bottom of the first deformation strip 1202 is provided with a first convex part 1204. One side of the top of the second deformation strip 1302 is provided with a second convex part 1304. The cross-sectional shapes of the first sieve mesh body 1203 and the second sieve mesh body 1303 are the same as those of the first deformation strip 1202 and the second deformation strip 1302 respectively. The aperture value of the second sieve mesh body 1303 is smaller than that of the first sieve mesh body 1203. The bottom of the dust collection box 6 is attached to the top of the support inclined plate 14. The dust collection box 6 is located directly below the second sieve plate 13. The first blanking frame 4 is located on one side of the first sieve plate 12. A blanking channel is formed between the bottom end of the diversion channel 10 and the second sieve mesh body 1303. The second blanking frame 5 is located directly below the blanking channel. Four support frames 9 are fixedly connected to both sides of the outside of the device main body 1, and a hard spring is provided at the center of each support frame 9. During the use process, the blower 8 is started, so that the blower 8 realizes the continuous reset of the two sieve plates through a knocking structure, generates a vibration force, and the particles to be screened are poured into the inside of the feed bin 3. The plastic particles will directly fall on the top of the first sieve plate 12 and accumulate. With the start of the blower 8 and the operation of the knocking structure, the knocking part 1501 starts to periodically knock the first convex part 1204 on the first deformation strip 1202.This knocking causes the first deformation bar 1202 to deform upward, and then reset due to its own elasticity. The first screen main body 1203 is fixedly connected to the first deformation bar 1202. Therefore, when the first deformation bar 1202 deforms and resets, the first screen main body 1203 will also perform these actions synchronously. This periodic deformation and reset make the plastic particles at the top of the first screen main body 1203 receive vibration and impact, making it easier to pass through the screen, realizing the preliminary separation of coarse and fine particles. At the same time, since the restoring force of the first deformation bar 1202 is directed towards the first feeding frame 4, the plastic particles will move a certain distance towards the first feeding frame 4 every time they pass through vibration screening, facilitating the discharge of coarser particles through the first feeding frame 4. The preliminarily screened material falls between the first screen plate 12 and the second screen plate 13. At this time, the airflow generated by the blower 8 will guide the material, causing it to hit the second screen plate 13. Under the action of the knocking structure, the second screen plate 13 will also vibrate in the same way as the first screen plate 12, enabling the finer particles and dust in the material to pass through the second screen plate 13 and enter the interior of the dust collection box 6. The medium-sized material falls into the second feeding frame 5 through the feeding channel formed between the diversion channel 10 and the bottom end of the second screen main body 1303 for feeding, thus completing the multi-stage screening of plastic particles. The device adopts a multi-stage screening design. The first screen plate 12 and the second screen plate 13 are respectively equipped with the first screen main body 1203 and the second screen main body 1303, and the aperture value of the second screen main body 1303 is smaller than that of the first screen main body 1203, realizing the separation of coarse and fine plastic particles. The combined action of the airflow generated by the blower 8 and the knocking structure makes the particles on the screen receive vibration and impact, improving the screening efficiency and ensuring the accuracy of screening. The entire screening process is automatically completed by the blower 8 and the knocking structure without manual intervention, reducing the labor intensity and improving the production efficiency. The screened particles are automatically fed through the first feeding frame 4 and the second feeding frame 5, facilitating subsequent processing. The design of the first deformation bar 1202 and the second deformation bar 1302 enables the screen to deform and reset when knocked. This periodic deformation and reset enhance the screening effect, making it easier for the particles to pass through the screen. At the same time, the restoring force of the first deformation bar 1202 is directed towards the first feeding frame 4, making the plastic particles move a certain distance towards the first feeding frame 4 every time they pass through vibration screening, facilitating the rapid discharge of coarser particles. The airflow generated by the blower 8 is not only used to guide the material but also helps to blow the dust and fine particles generated during the screening process into the dust collection box 6, reducing the dust pollution at the production site.
[0037] In this embodiment, as Figures 2 to 5As shown, a drainage channel 10 is fixedly connected inside the side box 7. The drainage channel 10 includes an arc-shaped guiding frame 1001. An inner channel 1002 is opened inside the guiding frame 1001. The inner channel 1002 is fixedly connected to the fan 8 in a communicating manner. Arc-shaped drainage baffles 1003 are symmetrically and fixedly connected to the top and bottom of the inner cavity of the inner channel 1002. The other end of the guiding frame 1001 is provided with an air outlet 1004 with an opening facing above the second sieve plate 13. When the fan 8 is started, the air flow is sucked in and enters the inside of the inner channel 1002 through the air inlet of the fan 8. The arc-shaped drainage baffles 1003 symmetrically and fixedly connected to the top and bottom of the inner cavity of the inner channel 1002 play a key role. The design of these drainage baffles 1003 not only enhances the structural stability of the inner channel 1002, but more importantly, effectively guides the air flow. When the air flow passes through the inner channel 1002, it is guided by the drainage baffles 1003 to form an orderly and stable flow pattern. This flow pattern ensures that the air flow can be evenly distributed inside the guiding frame 1001, thereby improving the utilization efficiency of the air flow. The air flow guided by the drainage baffles 1003 finally discharges through the air outlet 1004 opened at the other end of the guiding frame 1001 with an opening facing above the second sieve plate 13. The design of the air outlet 1004 enables the air flow to directly act on the materials above the second sieve plate 13, which helps the finer particles and dust in the materials to enter the inside of the dust collection box 6 through the second sieve plate 13. The arc-shaped drainage baffles 1003 not only enhance the structural stability of the inner channel 1002, but also ensure the uniform distribution of the air flow inside the inner channel 1002. This uniformly distributed air flow helps to reduce the turbulence and energy consumption of the air flow inside the guiding frame 1001, and improves the utilization efficiency of the air flow. Through the precise guidance of the drainage channel 10, the air flow generated by the fan 8 can effectively blow the dust and fine particles generated during the screening process into the dust collection box 6, thereby reducing the dust pollution at the production site.
[0038] In this embodiment, as Figures 2 to 8As shown in the figure, connecting shafts 1101 are fixedly connected to both sides of the inner cavity of the device main body 1. The ends of the connecting shafts 1101 are rotatably connected to wind wheels 11. A plurality of blades 1102 are annularly and fixedly connected to the outer ring of the wind wheels 11. The blades 1102 are integrally arc-shaped, and the cross-section of the blades 1102 is "C"-shaped. A cavity 1103 is formed inside the blades 1102. The cavity 1103 is located on the exhaust path of the exhaust port 1004. A stop block 1104 is fixedly connected to the blade 1102 at a position two centimeters from the open end. A driving wheel is fixedly connected to the back of the wind wheel 11. A transmission belt 16 is sleeved outside the driving wheel. Fixed columns 1502 are fixedly connected to the inner sides of both sides of the inner cavity of the device main body 1. An equilateral triangle rotating wheel 15 is rotatably connected to the outside of the fixed columns 1502. A driven wheel is fixedly connected to the front of the equilateral triangle rotating wheel 15. The driven wheel is connected to the driving wheel through the transmission belt 16. Knocking members 1501 are fixedly connected to the three vertices of the triangular plate. The knocking members 1501 are "C"-shaped members with an opening facing the equilateral triangle rotating wheel 15. The axis of the fixed column 1502 is located at the midpoint of the connection line of the protrusions of the first protrusion 1204 and the second protrusion 1304. When the air flow is blown towards the second sieve plate 13 through the guidance of the diversion channel 10, since the wind wheel 11 is located in the path of the air flow, the air flow can blow the blades 1102. When the air flow blows towards the wind wheel 11, the cavity 1103 can guide the air flow to push the wind wheel 11, and the stop block 1104 can limit the force exerted by the air flow on the wind wheel 11. Using the principle of the lever, the air flow can more easily push the wind wheel 11 to rotate. When the wind wheel 11 rotates, the rotation of the wind wheel 11 drives the driving wheel on its back to rotate. The driving wheel is connected to the driven wheel on the back of the equilateral triangle rotating wheel 15 through the transmission belt 16. Therefore, when the wind wheel 11 rotates, the equilateral triangle rotating wheel 15 also rotates. Knocking members 1501 are fixed at the three vertices of the equilateral triangle rotating wheel 15. These knocking members 1501 rotate with the rotation of the equilateral triangle rotating wheel 15. The shape of the knocking members 1501 is designed as a "C"-shaped member with an opening facing the equilateral triangle rotating wheel 15. This enables them to contact and produce a knocking and pressing effect with the first protrusion 1204 at the bottom of the first deformation strip 1202 and the second protrusion 1304 at the top of the second deformation strip 1302 during the rotation process. The knocking and pressing action of the knocking members 1501 causes the first deformation strip 1202 and the second deformation strip 1302 to deform and reset. This periodic deformation and reset cause the plastic particles on the sieve to be vibrated and impacted, thereby realizing the separation of coarse and fine particles. The coarser particles are screened by the first sieve mesh main body 1203 and discharged through the first blanking frame 4; the medium-sized particles are screened by the second sieve mesh main body 1303 and pass through the blanking channel between the diversion channel 10 and the bottom end of the second sieve mesh main body 1303, and finally are discharged through the second blanking frame 5;Fine particles and dust are guided by the airflow into the dust collection box 6. Through the design of the drainage channel 10 and the cavity 1103 of the blade 1102, the precise guidance and efficient utilization of the airflow generated by the fan 8 are achieved. It not only drives the rotation of the wind wheel 11 but also assists the screening process. The knocking and pressing action of the knocking member 1501 causes the sieve mesh to undergo periodic deformation and reset, enhancing the screening effect, making it easier for particles to pass through the sieve mesh, and achieving the effective separation of coarse and fine particles. The entire screening process is automatically completed by the airflow generated by the fan 8 and mechanical structures such as the wind wheel 11 and the equilateral triangular rotating wheel 15 without manual intervention, improving production efficiency. The airflow is not only used to drive the rotation of the wind wheel 11 but also helps to guide the dust and fine particles generated during the screening process into the dust collection box 6, reducing dust pollution at the production site.;
[0039] The working principle provided by the present invention is as follows. During use, the fan 8 is started. When the fan 8 starts, the air flow is inhaled and enters the interior of the inner channel 1002 through the air inlet of the fan 8. The arc-shaped drainage baffles 1003 symmetrically and fixedly connected to the top and bottom of the inner cavity of the inner channel 1002 play a key role. The design of these drainage baffles 1003 not only enhances the structural stability of the inner channel 1002, but more importantly, effectively guides the air flow. When the air flow passes through the inner channel 1002, it is guided by the drainage baffles 1003 to form an orderly and stable flow pattern. This flow pattern ensures that the air flow can be evenly distributed inside the guiding frame 1001, thereby improving the utilization efficiency of the air flow. The air flow guided by the drainage baffles 1003 finally discharges through the opening provided at the other end of the guiding frame 1001 towards the air outlet 1004 above the second sieve plate 13. When the air flow is blown towards the second sieve plate 13 through the guidance of the drainage channel 10, since the wind wheel 11 is located in the path of the air flow, the air flow can blow the blades 1102. When the air flow blows towards the wind wheel 11, the cavity 1103 can guide the air flow to push the wind wheel 11, and the stop block 1104 can limit the force exerted by the air flow on the wind wheel 11. Using the principle of the lever, the air flow can more easily push the wind wheel 11 to rotate. When the wind wheel 11 rotates, the rotation of the wind wheel 11 drives the rotation of the driving wheel on its back. The driving wheel is connected to the driven wheel on the back of the equilateral triangle rotating wheel 15 through the transmission belt 16. Therefore, when the wind wheel 11 rotates, the equilateral triangle rotating wheel 15 also rotates accordingly. Knockers 1501 are fixed at the three vertices of the equilateral triangle rotating wheel 15. These knockers 1501 rotate as the equilateral triangle rotating wheel 15 rotates. The shape of the knockers 1501 is designed as a "C"-shaped member with an opening facing the equilateral triangle rotating wheel 15, which enables them to contact and produce a knocking and pressing effect with the first raised portion 1204 at the bottom of the first deformable strip 1202 and the second raised portion 1304 at the top of the second deformable strip 1302 during rotation. The knocking and pressing action of the knockers 1501 causes the first deformable strip 1202 and the second deformable strip 1302 to deform and reset. Pour the particles to be screened into the interior of the feed bin 3. The plastic particles will directly fall on the top of the first sieve plate 12 and accumulate. With the start of the fan 8 and the operation of the knocking structure, the knockers 1501 start to periodically knock the first raised portion 1204 on the first deformable strip 1202. This knocking causes the first deformable strip 1202 to deform upward and then reset due to its own elasticity. The first sieve mesh body 1203 is fixedly connected to the first deformable strip 1202. Therefore, when the first deformable strip 1202 deforms and resets, the first sieve mesh body 1203 will also perform these actions synchronously.This periodic deformation and reset enable the plastic particles at the top of the first screen main body 1203 to be vibrated and impacted, making it easier for them to pass through the screen, achieving the preliminary separation of coarse and fine particles. At the same time, due to the resilience of the first deformation strip 1202 facing the first blanking frame 4, the plastic particles will move a certain distance towards the first blanking frame 4 every time they pass through the vibration screening, facilitating the discharge of coarser particles through the first blanking frame 4. The preliminarily screened material falls between the first screen plate 12 and the second screen plate 13. At this time, the airflow generated by the fan 8 will guide the material, causing it to hit the second screen plate 13. Under the action of the knocking structure, the second screen plate 13 will also vibrate in the same way as the first screen plate 12, enabling the finer particles and dust in the material to pass through the second screen plate 13 and enter the interior of the dust collection box 6. The medium-sized materials fall into the interior of the second blanking frame 5 through the blanking channel formed between the diversion channel 10 and the bottom end of the second screen main body 1303 for blanking, thus completing the multi-stage screening of the plastic particles.
[0040] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. Additionally, to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.
[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A multi-stage screening device for raw materials used in the production of plastic woven bags, including a device main body (1), characterized in that, The top of the device main body (1) is screwed with a top cover (2). One side of the top of the top cover (2) is fixedly connected with a feed bin (3). The outside of the device main body (1) is screwed with a side box (7). The front of the side box (7) is fixedly connected with a fan (8). The outside of the device main body (1) is slidably connected with a dust collection box (6). The outside of the device main body (1) is fixedly connected with a first blanking frame (4). The bottom of the device main body (1) is fixedly connected with a second blanking frame (5). A screening assembly for coarsely and finely screening plastic particles, and the screening assembly is connected to the device main body (1).
2. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 1, wherein, The screening assembly includes a first sieve plate (12) and a second sieve plate (13) fixedly connected to the inner wall of the device main body (1). The first sieve plate (12) includes two first fixing strips (1201) fixedly connected to both sides of the inner cavity of the device main body (1). The same-direction ends of the two first fixing strips (1201) are fixedly connected through a first deformation strip (1202). The outside of the two first deformation strips (1202) is attached to the inner wall of the device main body (1). A first sieve mesh body (1203) is fixedly connected inside the square frame formed by the two first fixing strips (1201) and the two first deformation strips (1202).
3. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 2, characterized in that, The bottom of one side of the inner cavity of the device main body (1) is fixedly connected with a support inclined plate (14). The two ends of the second sieve plate (13) are respectively connected to the top of the support inclined plate (14) and one side of the inner cavity of the device main body (1) through two second fixing strips (1301). The same-direction ends of the two second fixing strips (1301) are fixedly connected through a second deformation strip (1302). The outside of the two second deformation strips (1302) is attached to the inner wall of the device main body (1). A second sieve mesh body (1303) is fixedly connected inside the square frame formed by the two second deformation strips (1302) and the two second fixing strips (1301). One side of the bottom of the first deformation strip (1202) is provided with a first convex portion (1204). One side of the top of the second deformation strip (1302) is provided with a second convex portion (1304). The cross-sectional shapes of the first sieve mesh body (1203) and the second sieve mesh body (1303) are respectively the same as those of the first deformation strip (1202) and the second deformation strip (1302). The aperture value of the second sieve mesh body (1303) is smaller than the aperture value of the first sieve mesh body (1203).
4. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 3, wherein, The inside of the side box (7) is fixedly connected with a drainage channel (10). The drainage channel (10) includes an arc-shaped guiding frame (1001). An inner channel (1002) is opened inside the guiding frame (1001). The inner channel (1002) is fixedly communicated with the fan (8). Arc-shaped drainage baffles (1003) are symmetrically and fixedly connected to the top and bottom of the inner cavity of the inner channel (1002). The other end of the guiding frame (1001) is provided with an air outlet (1004) with an opening facing above the second sieve plate (13).
5. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 4, characterized in that, On both sides of the inner cavity of the device main body (1), a connecting shaft (1101) is fixedly connected. The end of the connecting shaft (1101) is rotatably connected to a wind wheel (11). A plurality of blades (1102) are annularly and fixedly connected to the outer ring of the wind wheel (11). A driving wheel is fixedly connected to the back of the wind wheel (11). A transmission belt (16) is sleeved outside the driving wheel.
6. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 5, characterized in that, The blades (1102) are integrally arc-shaped, and the cross-section of the blades (1102) is "C"-shaped. A cavity (1103) is formed inside the blades (1102). The opening of the cavity (1103) is located on the exhaust path of the exhaust port (1004). A baffle (1104) is fixedly connected to the blades (1102) at a position two centimeters away from the open end.
7. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 5, characterized in that, On the inner sides of both sides of the inner cavity of the device main body (1), a fixed column (1502) is fixedly connected. An equilateral triangular rotating wheel (15) is rotatably connected to the outside of the fixed column (1502). A driven wheel is fixedly connected to the front of the equilateral triangular rotating wheel (15). The driven wheel is drivingly connected to the driving wheel through a transmission belt (16). A knocking member (1501) is fixedly connected to each of the three vertices of the triangular plate.
8. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 7, characterized in that, The knocking member (1501) is in the shape of a "C"-shaped member with an opening facing the equilateral triangular rotating wheel (15). The axis of the fixed column (1502) is located at the midpoint of the connecting line of the protruding parts of the first protruding part (1204) and the second protruding part (1304).
9. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 8, characterized in that, The bottom of the dust collection box (6) is attached to the top of the support inclined plate (14). The dust collection box (6) is located directly below the second sieve plate (13). The first blanking frame (4) is located on one side of the first sieve plate (12). A blanking channel is formed between the drainage channel (10) and the bottom end of the second sieve mesh body (1303). The second blanking frame (5) is located directly below the blanking channel.
10. The multi-stage screening device for raw materials used in the production of plastic woven bags according to claim 1, wherein, Four support frames (9) are fixedly connected to both sides of the outside of the device main body (1), and a rigid spring is provided at the center of each support frame (9).