Treatment equipment for previous procedure of plastic film recovery

Abstract

The invention relates to the technical field of plastic recycling and cleaning, in particular to treatment equipment for a previous procedure of plastic film recycling. Comprising a separating mechanism, a detecting mechanism and a supplementing mechanism. A cutting knife on a roller in the separating mechanism is matched with a rotating tool bit of the auxiliary cutting mechanism, so that the plastic film can be effectively cut and separated, and particularly, the rotating tool bit reciprocates under the action of a cam and an elastic piece, and the rotating function of the rotating tool bit greatly enhances the separating and crushing effect on the plastic film. And the density meter is electrically connected with the receiver, so that the sewage concentration in the cleaning pool can be accurately monitored in real time. In addition, the supplementing mechanism can automatically control opening and closing of a valve in the feeding box according to the change of the water level in the cleaning pool through cooperation of a photoelectric switch and a receiver, and intelligent supplementing of the solution in the cleaning pool is achieved. Concentration and water level of cleaning liquid in the cleaning pool are guaranteed to be in a proper range, and cleaning effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling and cleaning, and specifically to a pretreatment equipment for the front-end process of plastic film recycling. Background Art

[0002] In daily life, plastic films can be found everywhere, from food packaging and shopping bags to product protection in industrial production and mulching in the agricultural field. This large-scale application has led to a sharp increase in the usage of plastic films. According to relevant statistical data, the annual global production of plastic films has been continuously rising in recent years. In China alone, the annual usage of plastic films is as high as several million tons.

[0003] However, with the explosion in the usage of plastic films, a large amount of waste plastic films has been generated. Due to their stable chemical properties, these waste plastic films are difficult to degrade in the natural environment. If not effectively recycled and treated, they will remain in the soil for decades or even hundreds of years, not only causing damage to the soil structure and affecting crop growth, but also entering water bodies with rainwater scouring, posing a serious threat to the aquatic ecosystem. In addition, a large amount of petroleum-based resources contained in waste plastic films are wasted, which is undoubtedly a huge loss in the current situation of increasingly scarce resources.

[0004] In the plastic film recycling process, the pretreatment of the front-end process, as the starting link, plays a crucial role. It directly affects whether the subsequent recycling and processing can proceed smoothly and the quality and efficiency of the final product.

[0005] Currently, in the process of cleaning and cutting plastic films, traditional cutting and separating devices mostly use simple blade cutting methods. For plastic films that are thin and tough, it is difficult to achieve complete separation and fragmentation. As a result, dirt and impurities are likely to remain at the winding points during subsequent cleaning, significantly reducing the cleaning effect. In the detection of sewage concentration, most devices rely only on simple manual detection or sensors with low accuracy, and cannot monitor the concentration changes of sewage in the cleaning tank in real time and accurately. This makes it difficult for operators to timely judge whether the cleaning liquid needs to be replaced according to the actual situation. Moreover, existing devices often lack intelligent control, either relying on manual periodic addition or replacement of clean water, or using a fixed-flow automatic replenishment method. This not only may cause waste of water resources, but also reduces the cleaning effect due to the imbalance of the cleaning liquid concentration. Summary of the Invention

[0006] Aiming at the defects existing in the prior art, the present invention provides a pretreatment equipment for the front-end process of plastic film recycling, aiming to clean and cut the plastic film through a separating mechanism, and to detect the sewage concentration in the cleaning tank in real time through a detection mechanism and a replenishing mechanism and dynamically adjust the water volume according to the water level in the cleaning tank, so as to solve the problems raised in the above background art.

[0007] The specific technical solution of a pretreatment equipment for plastic film recycling in the present invention includes:

[0008] A cleaning tank for cleaning the recycled plastic film. A discharge pipe is provided on one side of the cleaning tank, and a drain pipe is provided at the bottom.

[0009] A guiding roller is rotatably installed on one side inside the cleaning tank.

[0010] A separation mechanism is arranged on the cleaning tank and away from the guiding roller for cleaning and dividing the plastic film.

[0011] A detection mechanism is arranged on the left side wall of the cleaning tank for real-time detection of the sewage concentration in the cleaning tank.

[0012] A supplement mechanism is arranged on the right side wall of the cleaning tank for adding clear water.

[0013] The separation mechanism includes a feeding plate fixedly installed on the upper side of the cleaning tank. Two fixing plates are symmetrically arranged on the feeding plate. Motors are fixedly installed on both fixing plates. A first belt is installed at the output end of the motor. A feeding cylinder is fixedly installed between the two motors on the feeding plate. Two rollers are symmetrically and rotatably installed in the feeding cylinder. The two rollers rotate synchronously with the rotating blocks outside the feeding cylinder and cooperating with the first belt. Multiple rows of cutting knives are arranged on the circumferential outer surface of the roller. The cutting knives cooperate with the auxiliary cutting mechanism to further break the plastic film.

[0014] Preferably, the auxiliary cutting mechanism includes a first sliding plate and a second sliding plate slidably arranged on the feeding plate, an elastic member arranged between the first sliding plate and the second sliding plate. Multiple rotating cutter heads extending into the feeding cylinder and arranged staggeredly with the cutting knives are rotatably arranged on the first sliding plate and the second sliding plate. A cam is abutted between the first sliding plate and the second sliding plate. The cam is rotatably installed on the feeding plate through a bracket. The cam is rotationally connected to the output shaft of the motor through a second belt.

[0015] Preferably, a cutting edge is circumferentially arranged at one end of the rotating cutter head extending into the feeding cylinder. A sharpening stone is arranged on the barrel wall of the feeding cylinder below the rotating cutter head. A spiral chute cooperating with the convex block fixed at the tail end of the sharpening stone is arranged on the rotating cutter head.

[0016] Preferably, the detection mechanism includes a detection box fixedly installed on the left side wall of the cleaning tank. A receiver is arranged outside the detection box, and two protective plates are arranged inside. A densitometer for measuring the sewage concentration is placed inside the two protective plates. The densitometer is electrically connected to the receiver.

[0017] Preferably, a first baffle is installed at one end of the detection box close to the cleaning tank. A second baffle is fixedly installed on the left side of the first baffle. A circulation pipe is fixed on the outer side wall of the detection box. A drainage fan is fixedly installed at the connection of the circulation pipe and the cleaning tank.

[0018] Preferably, the replenishing mechanism includes a support plate fixedly installed on the right side wall of the cleaning tank. A feeding box is fixedly installed on the support plate. A valve is installed in the feeding box. A photoelectric switch is fixedly installed on the outer side wall of the detection box. The photoelectric switch is electrically connected to the receiver.

[0019] Preferably, a feeding groove is fixedly installed on the left side wall of the feeding box. A rectangular groove is opened at the bottom of the left side surface of the feeding groove. An overflow plate is fixedly installed at the bottom of the feeding groove.

[0020] Preferably, an electric push rod is fixedly installed on the side wall of the feeding cylinder close to the first belt. A pair of guide plates are slidably installed in the feeding cylinder. The feeding cylinder is provided with an inverted T-shaped groove that cooperates with the guide plates.

[0021] Preferably, the receiver is electrically connected to a two-way switch. The two-way switch controls the valve and the electric push rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. In the present invention, the cutting knife on the roller in the separating mechanism cooperates with the rotating cutter head of the auxiliary cutting mechanism, which can effectively cut and separate the plastic film. Especially, the reciprocating motion of the rotating cutter head under the action of the cam and the elastic member, as well as its self-rotation function, greatly enhances the separation and crushing effect of the plastic film, improving the processing efficiency and quality of the plastic film.

[0024] 2. The densitometer in the detection mechanism of the present invention is enclosed in a certain space by the protection plate to avoid being carried away by the water flow. By being electrically connected to the receiver, it can accurately monitor the sewage concentration in the cleaning tank in real time. At the same time, the settings of the first baffle, the second baffle, and the drainage fan effectively reduce the interference of the water flow on the measurement of the densitometer, ensuring the accuracy of the concentration monitoring.

[0025] 3. Through the cooperation of the photoelectric switch and the receiver in the replenishing mechanism of the present invention, it can automatically control the opening and closing of the valve in the feeding box according to the change of the water level in the cleaning tank, realizing the intelligent replenishment of the solution in the cleaning tank. When the water level drops and the densitometer sinks to block the ray of the photoelectric switch, the valve is automatically opened to add the solution, ensuring that the concentration and water level of the cleaning liquid in the cleaning tank are within a suitable range and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a cross-sectional view of the separating mechanism of the present invention;

[0028] Figure 3 is a side view of the roller of the present invention;

[0029] Figure 4Structural diagram of the cutting edge provided on the rotating tool head of the present invention;

[0030] Figure 5 is Figure 2 Enlarged view of the position E in;

[0031] Figure 6 Top view of the detection box of the present invention;

[0032] Figure 7 is Figure 6 B-B cross-sectional view of;

[0033] Figure 8 is Figure 6 A-A cross-sectional view of;

[0034] Figure 9 is Figure 6 C-C cross-sectional view of.

[0035] In the figure: 1. Cleaning pool; 2. Support plate; 3. Feeding box; 4. Feeding trough; 5. Feeding cylinder; 6. Guide roller; 7. Detection box; 8. Receiver; 9. Photoelectric switch; 10. First belt; 11. Feeding plate; 12. Motor; 13. Fixed plate; 14. Guide plate; 15. Roller; 1501. Cutting knife; 16. Auxiliary cutting mechanism; 1601. First slide plate; 1602. Second slide plate; 1603. Elastic member; 1604. Rotating tool head; 1605. Grinding stone; 1606. Cam; 1607. Second belt; 1608. Convex block; 1609. Spiral chute; 17. Density meter; 18. Protective plate; 19. Baffle one; 1901. Baffle two; 1902. Cavity one; 1903. Cavity two; 21. Rotating block; 23. Electric push rod; 24. Flow pipe; 25. Drain fan; 26. Discharge pipe; 27. Drain pipe. Specific embodiments

[0036] In order to better understand the content of the present invention, the following will further elaborate on the present invention in combination with specific embodiments and drawings. The following embodiments are based on the technology of the present invention and give detailed implementation manners and operation steps, but the protection scope of the present invention is not limited to the following embodiments.

[0037] Please refer to Figures 1 to 9 , the present invention provides a pretreatment equipment for plastic film recycling, including:

[0038] Cleaning pool 1, used for cleaning the recycled plastic film;

[0039] Guide roller 6, rotatably installed on one side inside the cleaning pool 1, used for guiding and collecting the cleaned plastic film;

[0040] The separation mechanism is arranged on the cleaning tank 1 and away from the material guiding roller 6, and is used for cleaning and dividing the plastic film;

[0041] The detection mechanism is arranged on the left side wall of the cleaning tank 1 and is used for detecting the sewage concentration in the cleaning tank 1 in real time;

[0042] The replenishment mechanism is arranged on the right side wall of the cleaning tank 1 and is used for adding clear water.

[0043] The separation mechanism includes a feeding plate 11 fixedly installed on the upper side of the cleaning tank 1. Two fixing plates 13 are symmetrically arranged on the feeding plate 11. Motors 12 are fixedly installed on both fixing plates 13. A first belt 10 is installed at the output end of the motor 12. A feeding cylinder 5 is fixedly installed between the two motors 12 on the feeding plate 11. Two rollers 15 are symmetrically and rotatably installed in the feeding cylinder 5. The two rollers 15 rotate synchronously with the rotating blocks 21 on the outside of the feeding cylinder 5 and cooperating with the first belt 10. The outer circumferential surface of the roller 15 is provided with multiple rows of cutting knives 1501. The cutting knives 1501 cooperate with the auxiliary cutting mechanism 16 outside the feeding cylinder 5, and can further separate and crush the plastic film, especially the part wound in the gaps of the cutting knives 1501.

[0044] The cooperative work of the cutting knives 1501 on the roller 15 and the auxiliary cutting mechanism 16 greatly improves the cutting efficiency of the plastic film; compared with the traditional single cutting method, the present invention can cut the plastic film into finer fragments, which is convenient for subsequent cleaning and recycling, and effectively improves the processing quality of the previous process of plastic film recycling.

[0045] The auxiliary cutting mechanism 16 includes a first sliding plate 1601 and a second sliding plate 1602 slidably arranged on the feeding plate 11, and an elastic member 1603 disposed between the first sliding plate 1601 and the second sliding plate 1602; a plurality of rotating cutter heads 1604 extending into the feeding cylinder 5 and arranged alternately with the cutting knife 1501 are rotatably provided on the first sliding plate 1601 and the second sliding plate 1602. The rotating cutter heads 1604 on the first sliding plate 1601 and the second sliding plate 1602 are arranged alternately, and the rotating cutter heads 1604 on the second sliding plate 1602 pass through the first sliding plate 1601; a cam 1606 is abutted between the first sliding plate 1601 and the second sliding plate 1602. The cam 1606 is rotatably mounted on the feeding plate 11 through a bracket, and the cam 1606 is rotatably connected to the output shaft of the motor 12 through a second belt 1607; when the motor 12 is started, while the motor 12 drives the roller 15 to rotate, it also drives the cam 1606 to rotate periodically. The cam 1606 squeezes the first sliding plate 1601 and the second sliding plate 1602 to move away from each other, and the two are reset under the action of the elastic member 1603, so that the rotating cutter heads 1604 on the first sliding plate 1601 and the second sliding plate 1602 alternately extend into the feeding cylinder 5 and cooperate with the cutting knife 1501 to realize the separation and crushing of the plastic film.

[0046] In the present invention, a cutting edge is circumferentially provided at one end of the rotating cutter head 1604 extending into the feeding cylinder 5, as shown in the figure; a sharpening stone 1605 is provided on the cylinder wall of the feeding cylinder 5 below the rotating cutter head 1604 for grinding the reciprocatingly telescopic rotating cutter head 1604 to improve the cutting effect on the plastic film; a spiral chute 1609 is provided on the rotating cutter head 1604 for cooperating with a convex block 1608 fixed to the tail end of the sharpening stone 1605. The spiral chute 1609 is arranged in a spiral shape on the surface of the rotating cutter head 1604; when the first sliding plate 1601 and the second sliding plate 1602 drive the rotating cutter head 1604 to reciprocate and telescope, the convex block 1608 slides along the spiral chute 1609, thereby realizing the self-rotation of the rotating cutter head 1604 and further enhancing its cutting and separating effect. The rotating cutter head 1604 can cut and crush the plastic film in all directions and at multiple angles under the cooperation of the cam 1606, the elastic member 1603, and the spiral chute 1609 and the convex block 1608, greatly reducing the adhesion and entanglement of the plastic film and providing a better material basis for the subsequent cleaning process.

[0047] The detection mechanism includes a detection box 7 fixedly installed on the left side wall of the cleaning tank 1. Two protective plates 18 are fixedly installed inside the detection box 7, and a densitometer 17 for measuring the concentration of sewage is placed inside the two protective plates 18; the densitometer 17 is electrically connected to the receiver 8 to monitor the concentration of sewage in the cleaning tank 1 in real time. In the present invention, the densitometer 17 is surrounded within a certain space by the protective plate 18, effectively preventing the densitometer 17 from being washed away by the water flow and ensuring the stability of the equipment operation. At the same time, the electrical connection between the densitometer 17 and the receiver 8 can transmit the sewage concentration data to the control system in real time and accurately, facilitating the timely adjustment of the cleaning process.

[0048] The replenishment mechanism includes a support plate 2 fixedly installed on the right side wall of the cleaning tank 1, and a feeding tank 3 is fixedly installed on the support plate 2; a valve is installed inside the feeding tank 3; a photoelectric switch 9 is fixedly installed on the outer side wall of the detection box 7, and the photoelectric switch 9 is electrically connected to the receiver 8; it is judged whether to add clean water by whether the ray emitted by the photoelectric switch 9 is blocked; if the water level in the cleaning tank 1 drops and the densitometer 17 sinks to block the ray emitted by the photoelectric switch 9, the receiver 8 controls the valve to rotate through a two-way switch to add a solution to the cleaning tank 1. The replenishment mechanism realizes the intelligent replenishment of the solution in the cleaning tank 1 through the cooperation of the photoelectric switch 9 and the receiver 8. This automatic control process not only saves labor costs compared with manual replenishment of the solution, but also can more accurately control the concentration and water level of the cleaning liquid in the cleaning tank 1, effectively improving the stability of the cleaning effect and ensuring the cleaning quality of the plastic film.

[0049] As an implementation mode of the present invention, a first baffle 19 is installed at one end of the detection box 7 close to the cleaning tank 1; the solution flowing into the detection box 7 is decelerated by the first baffle 19 to reduce the interference of the solution flow on the densitometer 17. Further, a second baffle 1901 is fixedly installed on the left side of the first baffle 19; taking advantage of the fact that the volume surrounded by the first baffle 19 and the second baffle 1901 is larger than the volume surrounded by the first baffle 19 and the detection box 7, when the solution fills the cavity 1902, since the volume of the cavity 1903 is larger, the water flow speed entering the cavity 1903 is smaller, further reducing the influence of the water flow on the densitometer 17.

[0050] As an embodiment of the present invention, a flow pipe 24 is fixed on the outer side wall of the detection box 7. One end of the flow pipe 24 is communicated with the detection box 7, and the other end is communicated with the cleaning pool 1. A drainage fan 25 is fixedly installed at the connection of the flow pipe 24 and the cleaning pool 1. The solution in the detection box 7 is continuously discharged by the drainage fan 25, so that the solution concentration in the detection box 7 is kept consistent with the solution concentration in the cleaning pool 1 in real time. The liquid level of the solution in the cleaning pool 1 is slightly higher than the top wall of the detection box 7 by 2-3 mm, and through holes are opened in the top wall of the detection box 7. When the solution fills the detection box 7, the drainage fan 25 is turned on, and the rotation speed of the drainage fan 25 is adjusted so that the drainage volume of the drainage fan 25 is greater than the solution inflow volume. In this way, even if the detection box 7 is installed below the liquid level, the solution will not leak out from the through holes, and the detection box 7 is filled with the solution. The densitometer 17 is placed into the through holes.

[0051] As an embodiment of the present invention, an electric push rod 23 is fixedly installed on the side wall of the feeding cylinder 5 close to the first belt 10. A pair of guide plates 14 are slidably installed in the feeding cylinder 5. The bottom ends of the guide plates 14 protrude from the feeding cylinder 5 and are fixedly connected with the electric push rod 23. The feeding cylinder 5 is provided with an inverted T-shaped groove that cooperates with the guide plates 14. If the sewage concentration in the cleaning pool 1 is too high or the water level is too low, the receiver 8 drives the electric push rod 23 through the two-way switch, and then pushes the guide plates 14 to close the feeding cylinder 5 to prevent the plastic film from entering the cleaning pool 1.

[0052] As an embodiment of the present invention, a feeding groove 4 is fixedly installed on the left side wall of the feeding box 3. A rectangular groove is opened at the bottom of the left side surface of the feeding groove 4, and the rectangular groove runs across the left side surface of the feeding groove 4. An overflow plate is fixedly installed at the bottom of the feeding groove 4. When the flowing clear water fills the overflow plate and then enters the cleaning pool 1, the solution uniformly flows into the right side of the cleaning pool 1 at this time.

[0053] As an embodiment of the present invention, a discharge pipe 26 is provided on one side of the cleaning pool 1. A auger is provided in the discharge pipe 26 for transporting the cleaned plastic film to the next process; a drain pipe is provided at the bottom of the cleaning pool 1 for overall discharging or replacing the sewage in the cleaning pool 1.

[0054] The specific working process of the present invention is as follows:

[0055] Start the motor 12. The motor 12 drives the rotating block 21 to rotate through the first belt 10, thereby causing the drum 15 to rotate. The cutting knife 1501 on the drum 15 starts to preliminarily cut the plastic film entering the feeding cylinder 5. At the same time, the motor 12 drives the cam 1606 to rotate periodically through the second belt 1607. The cam 1606 squeezes the first slide plate 1601 and the second slide plate 1602 to move away from each other, and the two are reset under the action of the elastic member 1603. During this process, the rotating cutter heads 1604 on the first slide plate 1601 and the second slide plate 1602 successively extend into the feeding cylinder 5 and cooperate with the cutting knife 1501 in a staggered manner to further separate and break the plastic film. During the reciprocating telescopic process of the rotating cutter head 1604, its spiral chute 1609 cooperates with the tail end protrusion 1608 of the grindstone 1605 to realize self-rotation, further improving the cutting effect.

[0056] The sewage in the cleaning tank 1 flows into the detection tank 7 through the circulation pipe 24. Under the action of the first baffle 19 and the second baffle 1901, the solution flowing into the detection tank 7 decelerates, reducing the interference to the densitometer 17. The densitometer 17 measures the concentration of suspended solids in the solution in the detection tank 7 in real time, which represents the concentration of sewage in the cleaning tank 1, and transmits the data to the receiver 8. The drainage fan 25 continuously discharges the solution in the detection tank 7, so that the concentration of the solution in the detection tank 7 is kept consistent with the concentration of the solution in the cleaning tank 1 in real time.

[0057] When the water level in the cleaning tank 1 is relatively low, the densitometer 17 sinks to block the ray of the photoelectric switch 9. At this time, the receiver 8 activates the two-way switch. On the one hand, the two-way switch pushes the guide plate 14 to close the feeding cylinder 5 to prevent the plastic film from entering the cleaning tank 1; on the other hand, it controls the valve to rotate, so that the clean water in the feeding tank 3 flows into the feeding trough 4. When the clean water fills the overflow plate, it evenly flows into the right end of the cleaning tank 1. The rotation of the guide roller 6 promotes the solution to flow leftward at an accelerated speed, so that the added clean water continuously diffuses towards the detection tank 7. When the added solution diffuses to the detection tank 7 and the densitometer 17 rises to no longer block the ray emitted by the photoelectric switch 9, the receiver 8 controls the valve to close and retracts the electric push rod 23, so that the plastic film continues to fall into the feeding cylinder 5, completing an automatic control process of solution replenishment.

[0058] The above are only the preferred embodiments of the present invention. The present invention may have other forms of embodiments according to the above preparation methods, which will not be listed one by one. Therefore, any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A plastic film recycling front-end processing equipment, comprising a cleaning tank (1) for cleaning the recycled plastic film, wherein a discharge pipe (26) is provided on one side of the cleaning tank (1) and a drainage pipe (27) is provided at the bottom; characterized in that: Also includes: A material guide roller (6) is rotatably mounted on one side of the interior of the cleaning tank (1); A separation mechanism, arranged on the cleaning tank (1) and away from the material guide roller (6), for cleaning and separating the plastic film; A detection mechanism, arranged on the left side wall of the cleaning tank (1), for detecting the sewage concentration in the cleaning tank (1) in real time; A replenishing mechanism, arranged on the right side wall of the cleaning tank (1), for replenishing clean water; The separation mechanism comprises a feed plate (11) fixedly mounted on the upper side of the cleaning tank (1), two fixed plates (13) are symmetrically arranged on the feed plate (11), a motor (12) is fixedly mounted on the two fixed plates (13), a first belt (10) is mounted on the output end of the motor (12), a feed drum (5) is fixedly mounted between the two motors on the feed plate (11), two rollers (15) are symmetrically mounted in the feed drum (5) for rotation, the two rollers (15) rotate synchronously with a rotating block (21) outside the feed drum and cooperating with the first belt, a plurality of rows of cutting knives (1501) are arranged on the circumferential outer surface of the roller (15), and the cutting knives (1501) cooperate with an auxiliary cutting mechanism (16) to achieve further crushing of the plastic film.

2. The plastic film recycling front-end processing equipment according to claim 1, characterized in that: The auxiliary cutting mechanism (16) comprises a first slide plate (1601) and a second slide plate (1602) which are slidably arranged on the feed plate (11), and an elastic member (1603) arranged between the first slide plate and the second slide plate; a plurality of rotating knife heads (1604) which are rotatably arranged on the first slide plate (1601) and the second slide plate (1602) and extend into the interior of the feed barrel (5) and are arranged alternately with the cutting knife (1501); a cam (1606) is abutted between the first slide plate (1601) and the second slide plate (1602); the cam (1606) is rotatably mounted on the feed plate (11) via a bracket; and the cam (16) is rotatably connected to the output shaft of the motor (12) via a second belt (1607).

3. The plastic film recycling front-end processing equipment according to claim 2, characterized in that: The rotating blade head (1604) is provided with a cutting blade on the circumference of one end of the feeding barrel, a whetstone (1605) is provided on the wall of the feeding barrel (5) below the rotating blade head, and a spiral groove (1609) is provided on the rotating blade head (1604) to cooperate with a protrusion (1608) fixed at the rear end of the whetstone (1605).

4. The plastic film recycling front-end processing equipment according to claim 1, characterized in that: The detection mechanism comprises a detection box (7) fixedly mounted on the left side wall of the cleaning tank (1); a receiver (8) is arranged outside the detection box (7) and two protective plates (18) are arranged inside the detection box; a density meter (17) for measuring sewage concentration is placed inside the two protective plates (18); the density meter (17) is electrically connected to the receiver (8).

5. The plastic film recycling front-end processing equipment according to claim 4, characterized in that: A baffle plate 1 (19) is installed at one end of the detection box (7) close to the cleaning pool (1), a baffle plate 2 (1901) is fixedly installed on the left side of the baffle plate 1 (19), a flow pipe (24) is fixed on the outer wall of the detection box (7), and a drainage fan is fixedly installed at the connection point between the flow pipe (24) and the cleaning pool (1).

6. The plastic film recycling front-end processing equipment according to claim 4, characterized in that: The replenishing mechanism comprises a support plate (2) fixedly mounted on the right side wall of the cleaning tank (1), a feeding box (3) fixedly mounted on the support plate (2), a valve installed in the feeding box (3), and a photoelectric switch (9) fixedly mounted on the outer side wall of the detection box (7), the photoelectric switch (9) being electrically connected to a receiver (8).

7. The plastic film recycling front-end processing equipment according to claim 6, characterized in that: A feeding trough (4) is fixedly mounted on the left side wall of the feeding box (3), a rectangular groove is provided at the bottom of the left side surface of the feeding trough (4), and an overflow plate is fixedly mounted at the bottom of the feeding trough (4).

8. The plastic film recycling front-end processing equipment according to claim 4, characterized in that: An electric push rod (23) is fixedly installed on the side wall of the feed barrel (5) close to the first belt (10), a pair of guide plates (14) are slidably installed in the feed barrel (5), and the feed barrel (5) is provided with an inverted T-shaped groove that cooperates with the guide plates (14).

9. A plastic film recycling front-end processing equipment according to any one of claims 4, 6 and 8, characterized in that: The receiver (8) is electrically connected to a two-way switch, and the two-way switch controls the valve and the electric push rod (23).

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