A vibrating sieve machine for PET bottle flakes impurities

Abstract

The utility model relates to solid waste recycling equipment technical field discloses a PET bottle piece impurity's vibrating screen separator, it includes base, vibrating frame through spring elasticity support, filter screen and drive eccentric hammer's double -end motor, and vibrating frame end part sets up the discharge assembly, including the baffle that slides along the guide structure, is fixed in both sides and receives the board, pull rod and tension spring, and the baffle side edge corresponds to close and open position to set up respectively upper, lower clamping hole, and pull rod sliding is equipped in the receiving board, and the elastic force of tension spring is used to drive pull rod automatic reset and insert into clamping hole and lock.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid waste recycling and treatment equipment, and in particular relates to a vibrating screen for impurities in PET bottle flakes. Background Technology

[0002] As a recycled resource, PET bottle flakes inevitably retain fine dust, label fragments, and impurities generated during the washing process even after pre-treatment processes such as crushing and washing. To improve the quality of recycled PET bottle flakes, a vibrating screen is needed to further remove and sort these residual impurities.

[0003] Existing vibrating screens used in PET bottle flake sorting applications generally suffer from inadequate discharge port design. Traditional discharge ports often employ simple gate or sliding plate structures for opening and closing control. However, during high-frequency vibrating screening operations, these simple discharge port baffles are prone to loosening or displacement due to intense vibration, creating gaps between the baffle and the vibrating frame. This causes material within the vibrating frame to spill out prematurely or accidentally before screening is complete. This not only results in material loss and affects the purity of the finished product but also increases the workload of subsequent cleaning.

[0004] Furthermore, when operators manually open the discharge baffle to release material after screening, external force is often required to keep the baffle in the open position. The lack of an effective self-locking structure makes the discharge process inconvenient and inefficient. This discharge port design fails to achieve reliable closure during screening and stable opening and locking during discharge, becoming a major structural defect restricting the efficiency and reliability of PET bottle flake screening equipment.

[0005] Therefore, this utility model proposes a vibrating sieve for impurities in PET bottle flakes to overcome the shortcomings of the prior art. Summary of the Invention

[0006] To overcome the above shortcomings, this utility model provides a vibrating screen for PET bottle flake impurities, aiming to improve the existing technology where the discharge port baffle is prone to loosening due to vibration during equipment operation, resulting in accidental spillage and loss of materials, and the lack of an effective self-locking structure during discharge, which makes operation inconvenient and inefficient.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a vibrating sieve for impurities in PET bottle flakes, comprising a base, springs, a vibrating frame, a filter screen, a double-ended motor, a connecting rod, and an eccentric hammer; The vibrating frame is provided with a discharge assembly at the end opening, which includes a baffle, a handle, a receiving plate, a pull rod, a tension spring, and a locking hole. The core structure of the discharge assembly is as follows: the baffle slides along the guide structure of the inner wall of the vibration frame to open and close the discharge port of the vibration frame; the receiving plate is fixedly connected to both sides of the outer frame of the discharge assembly to support the locking mechanism; the receiving plate has a through hole inside, the pull rod slides through the through hole, the pull rod is fitted with a tension spring on the outside of the rod, one end of the tension spring abuts against the receiving plate, and the other end abuts against the limiting boss on the pull rod; the baffle has two engaging holes on its side that cooperate with the pull rod, the engaging holes being located at the upper closed position and the lower open position of the baffle, respectively; The elastic force of the tension spring drives the pull rod to automatically reset and insert into the locking hole for locking. Through the cooperation of the baffle, the pull rod, the tension spring, and the locking hole, the baffle automatically locks in both the closed and open positions. Furthermore, the top of the base is elastically supported and connected to the vibration frame by the spring; the filter screen is fixedly installed in the hollow cavity inside the vibration frame; the outer wall of the vibration frame is fixedly connected to the double-ended motor by the mounting base, and the output end of the double-ended motor is rotatably connected to the eccentric hammer through the connecting rod, and there are multiple eccentric hammers; Preferably, a guide channel is fixedly connected to the bottom of the inner wall of the vibration frame and below the filter screen. The guide channel is used to collect and discharge impurities that pass through the filter screen. Preferably, the number of springs is four, and the springs are respectively disposed at the top of the base and the four corners of the bottom of the vibration frame; Preferably, the dual-end motor synchronously drives the plurality of eccentric hammers to rotate via the connecting rod, thereby generating an excitation force on the vibration frame; Preferably, the receiving plate is a U-shaped structural plate, which provides stable support and limiting function for the tie rod and the tension spring; Preferably, the engaging hole includes an upper engaging hole located at the upper part of the baffle and a lower engaging hole located at the lower part of the baffle. The upper engaging hole is used for locking when the baffle is in the closed state, and the lower engaging hole is used for locking when the baffle is in the open state. Preferably, when the baffle is in the closed state, the upper engaging hole is horizontally aligned with and engaged with the end of the pull rod; when the baffle is in the open state, the lower engaging hole is horizontally aligned with and engaged with the end of the pull rod. Preferably, the outlet of the guide channel is located on the side of the vibrating frame, and the outlet of the guide channel is separate from the discharge direction of the discharge component; Preferably, the handle is fixedly connected to the top center of the baffle.

[0008] This utility model has the following beneficial effects: 1. This utility model solves the problems in the prior art where the baffle of the vibrating frame is easily loosened during operation, causing accidental material spillage, and the baffle cannot be easily fixed and kept open during discharge, by setting a discharge component including a baffle, a pull rod, a tension spring, and a locking hole at different positions on the baffle. The elastic reset effect of the tension spring is used in conjunction with the locking hole at different positions on the baffle for automatic locking. This achieves the technical effect of automatic locking during screening and convenient positioning and locking during discharge, greatly improving the reliability of equipment operation and the convenience of operation.

[0009] This invention employs a dual-end motor with connecting rods to drive multiple eccentric hammers to rotate synchronously, combined with a four-corner spring support structure to achieve efficient vibration. An inclined guide channel is set below the filter screen, solving the problems of uneven vibration force leading to low screening efficiency and easy secondary mixing of screened impurities with the finished product in existing screening equipment. It achieves the technical effects of uniform vibration, thorough screening, and efficient removal of impurities through an independent outlet, effectively ensuring the purity and screening efficiency of the PET bottle flakes.

[0010] This invention solves the problem of structural deformation or jamming failure of the locking mechanism under long-term high-frequency vibration by designing the receiving plate as a U-shaped rigid structure for stable support and limiting of the pull rod and tension spring. It achieves the technical effect of enhancing the structural rigidity of the discharge assembly, ensuring accurate pull rod reset and long-term stable and reliable locking action, thereby extending the service life of the discharge assembly. Attached Figure Description

[0011] Figure 1 This is a perspective view of a vibrating sieve for removing impurities from PET bottle flakes according to the present invention. Figure 2 This is a schematic diagram of the connecting rod of a vibrating sieve for impurities in PET bottle flakes according to the present invention. Figure 3 This is a schematic diagram of the vibrating frame of a vibrating sieve for impurities in PET bottle flakes proposed in this utility model. Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0012] Legend: 1. Base; 2. Vibration assembly; 201. Double-ended motor; 202. Eccentric hammer; 203. Connecting rod; 204. Guide channel; 205. Spring; 3. Filter screen; 4. Discharge assembly; 401. Baffle; 402. Handle; 403. Receiving plate; 404. Pull rod; 405. Tension spring; 406. Engaging hole; 5. Vibration frame. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Reference Figures 1-4 The present invention provides an embodiment of a vibrating screen for impurities in PET bottle flakes, comprising a base 1 and a vibrating frame 5 connected to the top of the base 1 by spring 205. The base 1 serves as the mounting base for the entire device, and the vibrating frame 5 is used to carry materials and perform vibrating screening. A filter screen 3 is fixedly installed in the hollow cavity inside the vibrating frame 5 to block PET bottle flakes and allow impurities to pass through. A double-ended motor 201 is fixedly connected to the outer wall of the vibrating frame 5 via a mounting base. The double-ended motor 201 is the excitation source of the vibration. Its output end is rotatably connected to multiple eccentric hammers 202 via a connecting rod 203. The double-ended motor 201 synchronously drives the multiple eccentric hammers 202 to rotate via the connecting rod 203, thereby generating an excitation force on the vibrating frame 5. There are four springs 205, which are respectively set at the top of the base 1 and the four corners of the bottom of the vibrating frame 5. Through their own elasticity, the excitation force is converted into the shaking effect of the vibrating frame 5 to achieve efficient screening. A guide channel 204 is fixedly connected to the bottom of the inner wall of the vibrating frame 5 and below the filter screen 3. The guide channel 204 is used to collect and discharge the fine impurities that have passed through the filter screen 3. The key component of this invention is the discharge assembly 4, which is located at the end opening of the vibrating frame 5. It is used to precisely control the discharge of material after screening. The discharge assembly 4 includes a baffle 401 that slides along a guide structure on the inner wall of the vibrating frame 5. The baffle 401 is used to open and close the discharge port. A handle 402 is fixedly connected to the top center of the baffle 401 for operating the baffle 401 to slide up and down. The discharge assembly 4 also includes a receiving plate 403, which is a U-shaped plate fixedly connected to both sides of the outer frame of the discharge assembly 4. It is used for stable support and a limiting locking mechanism. A through hole is provided inside the receiving plate 403, through which a pull rod 404 slides. A tension spring 405 is sleeved on the outside of the pull rod 404. One end of the tension spring 405 abuts against the receiving plate 403, and the other end abuts against a limiting boss on the pull rod 404. The tension spring 405 provides elastic force, enabling the pull rod 404 to have an automatic reset function. Two engaging holes 406 are provided on the side of the baffle 401 to cooperate with the pull rod 404. The engaging holes 406 are key to realizing the locking function. The engaging holes 406 include an upper engaging hole 406 located at the upper part of the baffle 401 and a lower engaging hole 406 located at the lower part of the baffle 401. The upper engaging hole 406 is used for locking when the baffle 401 is in the closed state, and the lower engaging hole 406 is used for locking when the baffle 401 is in the open state. The elastic force of the tension spring 405 drives the pull rod 404 to automatically reset and insert into the corresponding engaging hole 406, thereby locking the baffle 401 in the closed or open position. The key to the discharge assembly 4 lies in the automatic locking structure formed by the baffle 401 and the pull rod 404. The baffle 401 has a guide structure that matches the straight slide rail extending along its height direction and the inner wall of the vibrating frame 5, so as to achieve smooth up and down sliding at the discharge port. A handle 402 is fixedly connected to the top middle position of the baffle 401 for the operator to manually control the raising and lowering of the baffle 401; Two locking holes 406 for positioning are provided on the side of the baffle 401. These two locking holes 406 are the core for locking the baffle 401 in different states. The locking holes 406 include an upper locking hole 406 located at the upper part of the baffle 401 and a lower locking hole 406 located at the lower part of the baffle 401. The upper locking hole 406 corresponds to the position when the baffle 401 completely closes the discharge port, and the lower locking hole 406 corresponds to the position when the baffle 401 is fully open. The receiving plate 403, serving as the support platform for the locking mechanism, is a U-shaped structure plate fixedly connected to both sides of the outer frame of the discharge assembly 4. Through holes are provided inside the receiving plate 403. The pull rod 404 slides through the through holes in the receiving plate 403. A tension spring 405 is sleeved on the outer side of the pull rod 404. One end of the tension spring 405 abuts against the receiving plate 403, and the other end abuts against the limiting boss on the pull rod 404. The elastic force of the tension spring 405 ensures that, when no external force is applied, the end of the pull rod 404 automatically protrudes inward, aligning and inserting into the corresponding engaging hole 406. In the assembled state, when the baffle 401 is operated to the closed state, the upper engaging hole 406 moves to be horizontally aligned with the end of the pull rod 404, and the tension spring 405 drives the pull rod 404 to automatically insert into the upper engaging hole 406, completing the locking of the baffle 401. This spring-automatic-reset locking structure ensures the stability of the baffle 401 during vibration and prevents accidental spillage of materials; When material discharge is required, the operator pulls the lever 404 outward to disengage it from the engaging hole 406, then pulls up the baffle 401. When the lower engaging hole 406 moves to a horizontal alignment with the end of the lever 404, the operator releases the lever 404, which automatically inserts into the lower engaging hole 406, locking the baffle 401 in the open position to ensure smooth material discharge. The receiving plate 403 provides stable support and limiting for the lever 404 and the tension spring 405, ensuring smooth and reliable operation of the locking mechanism. The double-ended motor 201 is fixedly connected to the outer wall of the vibration frame 5 via a mounting base. The output ends on both sides of the double-ended motor 201 are rotatably connected to eccentric hammers 202 via connecting rods 203. Multiple eccentric hammers 202 are distributed along the axial direction of the double-ended motor 201. The double-ended motor 201 drives the eccentric hammers 202 on both sides to rotate synchronously to generate excitation force. Regarding the specific structure of the elastic support, the number of springs 205 is set to four. The four springs 205 are respectively fixedly connected between the four corners of the top plane of the base 1 and the four corners of the bottom plane of the vibration frame 5. This four-corner support layout can effectively balance the force on the vibration frame 5 during vibration and prevent it from tipping over or vibrating off course. Regarding the specific structure for impurity discharge, the guide channel 204 is fixedly connected to the bottom of the inner wall of the vibrating frame 5, and its position is strictly below the filter screen 3. The guide channel 204 is inclined to guide the flow of impurities by gravity. The outlet of the guide channel 204 is located on the side of the vibrating frame 5. The side discharge direction of the guide channel 204 is separate from the end discharge direction of the discharge component 4. This independent discharge structure avoids the screened impurities from being mixed into the qualified PET bottle flakes again. For the support structure of the discharge assembly 4, the receiving plate 403 adopts a U-shaped structural plate design. The two arms of the U-shaped structural plate are fixedly connected to the two sides of the outer frame of the discharge assembly 4. The bottom crossbeam of the U-shaped structural plate is used to pass through the tie rod 404 and abut against the tension spring 405. This U-shaped rigid structure can withstand the tension generated by the frequent operation of the tie rod 404 and the elastic force of the tension spring 405, ensuring the structural stability of the locking mechanism for long-term use.

[0015] Working Principle: When screening impurities in PET bottle flakes is required, the discharge port is first locked. The operator presses down on the baffle 401 using handle 402, causing it to slide along the guide structure on the inner wall of the vibrating frame 5 to the bottom of the discharge port, at which point the baffle 401 is completely closed. Due to the elastic restoring action of the tension spring 405, the pull rod 404 is pushed inward and inserted into the upper locking hole 406 above the baffle 401, thereby locking the baffle 401 in place. This locking state ensures that the material inside the vibrating frame 5 will not prematurely or accidentally flow out during vibration, preventing material loss. The receiving plate 403 provides stable support for the pull rod 404 and the tension spring 405 throughout the process. The PET bottle flakes to be processed are fed onto the filter screen 3. The dual-end motor 201 is started, driving the connecting rod 203 to rotate, which in turn drives multiple eccentric hammers 202 to rotate eccentrically in sync. The excitation force generated by the eccentric motion is transmitted to the vibrating frame 5. With the elastic support of the four springs 205 at the bottom, the entire vibrating frame 5 generates high-frequency reciprocating vibration. Under the action of vibration, the material rolls and jumps on the surface of the filter screen 3. Fine impurities pass through the filter screen 3 and fall into the guide channel 204 below, and flow along the inclined guide channel 204 to the side outlet of the vibrating frame 5 to be discharged from the equipment, completing the impurity separation. The side outlet of the guide channel 204 is separated from the discharge direction of the discharge component 4 to avoid secondary pollution. Larger qualified PET bottle flakes are trapped above the filter screen 3. Once screening is complete, the operator pulls the lever 404 outwards, compressing the tension spring 405 and disengaging the lever 404 from the upper locking hole 406, thus releasing the lock. Then, the operator pulls the baffle 401 upwards using the handle 402. When the lower locking hole 406 below the baffle 401 moves to a position horizontally aligned with the end of the lever 404, the operator releases the lever 404. The spring force of the tension spring 405 causes the lever 404 to automatically reset and insert into the lower locking hole 406, locking the baffle 401 in the open position. At this point, the discharge port is fully open, and the screened clean PET bottle flakes are discharged and collected through the discharge assembly 4 under residual vibration or gravity.

Claims

1. A vibrating sieve for impurities in PET bottle flakes, comprising: The base (1) has a vibrating frame (5) connected to its top via a spring (205). A filter screen (3) is fixedly installed in the hollow cavity inside the vibration frame (5); The outer wall of the vibration frame (5) is fixedly connected to a double-ended motor (201) via a mounting base. The output end of the double-ended motor (201) is rotatably connected to an eccentric hammer (202) via a connecting rod (203). There are multiple eccentric hammers (202). Its characteristic is that it further includes: The end opening of the vibrating frame (5) is provided with a discharge component (4), which is used to control the discharge of materials; The discharge assembly (4) includes a baffle (401) that slides along the guide structure of the inner wall of the vibration frame (5), and a handle (402) is fixedly connected to the top middle position of the baffle (401). The discharge assembly (4) also includes a receiving plate (403), which is fixedly connected to both sides of the outer frame of the discharge assembly (4); The receiving plate (403) has a through hole inside, and a pull rod (404) slides through the through hole. A tension spring (405) is sleeved on the outside of the pull rod (404). One end of the tension spring (405) abuts against the receiving plate (403), and the other end abuts against the limiting boss on the pull rod (404). The baffle (401) has two engaging holes (406) on its side that cooperate with the pull rod (404). The engaging holes (406) are located at the upper closed position and the lower open position of the baffle (401), respectively. The elastic force of the tension spring (405) drives the pull rod (404) to automatically reset and insert into the engaging holes (406) for locking.

2. The vibrating sieve for PET bottle flake impurities according to claim 1, characterized in that: A guide channel (204) is fixedly connected to the bottom of the inner wall of the vibration frame (5) and below the filter screen (3). The guide channel (204) is used to collect and discharge impurities that pass through the filter screen (3).

3. The vibrating sieve for PET bottle flake impurities according to claim 1, characterized in that: The number of springs (205) is four, and the springs (205) are respectively located at the top of the base (1) and the four corners of the bottom of the vibration frame (5).

4. The vibrating sieve for PET bottle flake impurities according to claim 1, characterized in that: The dual-end motor (201) synchronously drives the plurality of eccentric hammers (202) to rotate through the connecting rod (203) to generate an excitation force on the vibration frame (5).

5. The vibrating sieve for PET bottle flake impurities according to claim 1, characterized in that: The receiving plate (403) is a U-shaped structural plate, which is used to provide stable support and limit the tension rod (404) and the tension spring (405).

6. The vibrating sieve for PET bottle flake impurities according to claim 1, characterized in that: The engaging hole (406) includes an upper engaging hole (406) located at the upper part of the baffle (401) and a lower engaging hole (406) located at the lower part of the baffle (401). The upper engaging hole (406) is used for locking when the baffle (401) is in the closed state, and the lower engaging hole (406) is used for locking when the baffle (401) is in the open state.

7. The vibrating sieve for PET bottle flake impurities according to claim 6, characterized in that: When the baffle (401) is in the closed state, the upper engaging hole (406) is horizontally aligned with and engaged with the end of the pull rod (404); when the baffle (401) is in the open state, the lower engaging hole (406) is horizontally aligned with and engaged with the end of the pull rod (404).

8. The vibrating sieve for PET bottle flake impurities according to claim 2, characterized in that: The outlet of the guide channel (204) is located on the side of the vibration frame (5), which is separate from the discharge direction of the discharge assembly (4).

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