An intelligent EVA waste grading screening machine

Abstract

The present invention relates to the field of screening machines, and in particular to an intelligent EVA waste grading screening machine, including a support frame, a screening box, a transparent plate, a discharge hopper, a feeding assembly, a fixed frame, a screening cylinder, a gear ring, a driving gear, a first motor, a blower, an exhaust pipe, an air nozzle and an auxiliary mechanism. The present invention sets a plurality of screening cylinders in the fixed frame. When the sieve holes on the screening cylinder face downward, the sieve holes can screen EVA waste of corresponding sizes, and the outer diameters of the sieve holes on each screening cylinder are different. Rotating different screening cylinders changes the size combination of the downward sieve holes, which is conducive to more intelligent response to EVA waste of different batches and sizes, improves the flexibility of the screening machine, reduces the bounce of EVA waste particles during the screening process, helps separate EVA particles that stick to each other, avoids clogging the sieve holes, and ensures the continuity and efficiency of the screening process.

Description

Technical Field

[0001] The invention relates to the field of screening machines, and in particular to an intelligent EVA waste grading screening machine. Background Art

[0002] EVA waste refers to the waste of ethylene-vinyl acetate copolymer materials generated during the production, processing or use process, and granular EVA waste is one of them. It needs to be graded and screened during reprocessing. Through graded screening, particles of different sizes, qualities or characteristics can be separated to meet different recycling needs or improve the quality of reprocessed products. For example, large particles of EVA waste may be more suitable for direct melting and regeneration, while fine particles may be used to make filling materials.

[0003] The existing publication number is: CN215940544U, which discloses an EVA particle screening device, including a screening box, a feeding port is arranged at the center of the top of the screening box, a first sieve plate and a second sieve plate are respectively installed in the inner cavity of the feeding port, and the inner cavity of the first sieve plate is evenly provided with first sieve holes. The first sieve plate and the second sieve plate move downward, so that the first sieve plate and the second sieve plate are shaken up and down, and the EVA particles are screened in multiple stages, thereby improving the screening efficiency of the particles, and there is no need to manually shake the screen, thereby reducing the labor intensity of workers.

[0004] The existing patent still has the following problems: 1. The size of the sieve holes on the first sieve plate and the second sieve plate is fixed, so the size of the EVA particles screened by the first sieve plate and the second sieve plate is relatively fixed, which makes it difficult to screen more EVA particles of different sizes more intelligently, reducing the flexibility of the screening machine; 2. EVA particles are easily affected by vibration and bounce during screening, causing the EVA particles to fail to pass through the sieve holes in time, which is likely to affect the screening efficiency of the EVA particles; 3. It is difficult to introduce EVA particles evenly, which is likely to cause EVA particles to accumulate in the screening machine, and may also cause the sieve holes to be blocked, thereby affecting the screening efficiency; 4. Impurities may adhere to the outer surface of the EVA particles during storage and transportation, and the outer diameter of the EVA particles with impurities becomes larger. Directly introducing the EVA particles with impurities into the screening machine is likely to result in inaccurate screening. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides an intelligent EVA waste grading screening machine to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an intelligent EVA waste grading screening machine, comprising a support frame, a screening box is installed on the support frame, a plurality of discharge hoppers are arranged at the bottom of the screening box, each of the discharge hoppers is connected with the inner side of the screening box, a feeding assembly and an auxiliary mechanism are arranged on the screening box, a fixing frame is detachably installed in the screening box, and a pressing assembly is arranged on the screening box;

[0007] A plurality of screening cylinders corresponding to the discharge hoppers are rotatably mounted in the fixed frame, two adjacent screening cylinders are movably connected, and the inner diameter of the tube body formed by the combination of the screening cylinders gradually decreases from one end to the other end;

[0008] The fixed frame is provided with a driving assembly for driving the screening drum to rotate;

[0009] A plurality of partitions are installed in the screening cylinder and are distributed in an annular shape with equal intervals. A screening cavity is formed between two adjacent partitions and the screening cylinder. A plurality of sieve holes are opened in the screening cavity and pass through the side surface of the screening cylinder. The inner diameters of the sieve holes in the same screening cavity are the same, while the inner diameters of the groups of sieve holes in different screening cavities are different.

[0010] The down-pressure assembly includes a blower installed on the side surface of the screening box, an exhaust pipe plugged into the air outlet of the blower, the exhaust pipe runs through the side surface of the screening box and the inner side of each screening cylinder, and a plurality of air nozzles are installed at the bottom of the exhaust pipe, and the air nozzles are used to guide the downward airflow to act on the EVA waste;

[0011] The feeding assembly includes a guide cylinder, a feeding hopper fixedly embedded on the guide cylinder, a roller rotatably installed in the guide cylinder, and a feeding frame arranged at the bottom of the guide cylinder and fixedly embedded in the side surface of the screening box. The second motor is detachably installed on the side surface of the guide cylinder, and the output shaft of the second motor passes through the side surface of the guide cylinder and is coaxially connected to the roller. A plurality of push plates distributed in annular shapes with equal intervals are installed on the side surface of the roller, and the feeding frame is connected to the inner side of the screening cavity at the lower right end.

[0012] Preferably, a transparent plate is embedded in the front end surface of the screening box for observing the state of the screening cylinder in the screening box.

[0013] Preferably, the driving assembly comprises a gear ring sleeved on the screening drum, a driving gear disposed on the gear ring and meshing therewith, and a first motor installed in a fixed frame, wherein the output shaft of the first motor is connected to the inner ring of the driving gear.

[0014] Preferably, the outer diameters of the screening cylinders in the fixing frame are consistent, and the inner end surfaces of the screening cylinders are parallel and connected.

[0015] Preferably, the exhaust pipe is provided with three rows of air nozzles, the middle row of air nozzles is vertically arranged downward, and the front and rear rows of air nozzles are respectively extended outwardly at an angle.

[0016] Preferably, a fixing net is fixedly embedded in the inner bottom of the feeding frame, and the fixing net is flush with the inner bottom of the feeding frame.

[0017] Preferably, a collecting frame is detachably mounted on the bottom end surface of the feeding frame, and the fixed net completely falls into the feeding frame.

[0018] Preferably, the feeding hopper is tapered from top to bottom.

[0019] Preferably, the auxiliary mechanism includes a suction fan installed on the side surface of the screening box, and an air suction pipe plugged into the suction end of the suction fan, the air suction pipe passes through the outer bottom of the screening box, and a plurality of air suction nozzles are installed on the air suction pipe, and a partition net connected to the inner wall of the screening box is arranged outside the air suction nozzle, and the partition net is located above and in front of the discharge hopper.

[0020] Preferably, the rear end surface of the partition net is flush with the front end of the top of the discharge hopper.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention arranges a plurality of screening cylinders in a fixed frame. When the sieve holes on the screening cylinders face downward, the sieve holes can screen EVA waste of corresponding sizes. Moreover, the outer diameters of the sieve holes on each screening cylinder are different. Rotating different screening cylinders changes the size combination of the downward sieve holes, which is conducive to more intelligent response to EVA waste of different batches and sizes and improves the flexibility of the screening machine.

[0023] 2. The present invention provides a downward pressure component to generate a downward airflow through the air nozzle. The airflow acts on the EVA particles to reduce the bouncing of the EVA waste particles during the screening process. The airflow can also help separate the EVA particles that are stuck to each other to avoid clogging the sieve holes, thereby ensuring the continuity and efficiency of the screening process.

[0024] 3. The present invention arranges a feed assembly on the screening box, and arranges a plurality of equally spaced push plates outside the roller, so that the size of the feeding space formed by adjacent push plates and the guide cylinder is relatively uniform. As the second motor drives the roller and the push plate to rotate, the EVA waste particles in the feeding space are uniformly fed into the screening box for graded screening, thereby reducing the accumulation of EVA particles in the screening machine, which is beneficial to reducing the blockage of the sieve holes and improving the screening efficiency of the EVA waste particles. At the same time, the EVA waste particles are beaten by the push plate and roll in the guide cylinder, which is beneficial to shake off the impurities attached to the outer surface, so that the outer diameter of the graded and screened EVA waste particles is more accurate, thereby improving the accuracy of the graded screening of the EVA waste particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the front cross-sectional structure of the screening machine of the present invention;

[0027] Figure 3 It is a schematic diagram of the side view structure of the screening cylinder of the present invention;

[0028] Figure 4 It is a schematic diagram of the connection structure of the screening cylinder of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the feeding assembly of the present invention;

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the auxiliary mechanism of the present invention when viewed from above.

[0031] Among them: support frame -1, screening box -2, transparent plate -3, discharge hopper -4, feed assembly -5, fixed frame -6, screening cylinder -7, gear ring -8, driving gear -9, first motor -10, blower -11, exhaust pipe -12, air nozzle -13, auxiliary mechanism -14, partition -15, screening chamber -16, sieve hole -17, guide cylinder -51, feed hopper -52, roller -53, second motor -54, push plate -55, feeding frame -56, collecting frame -57, fixed net -58, suction fan -14a, suction pipe -14b, suction nozzle -14c, separation net -14d. DETAILED DESCRIPTION

[0032] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0033] like Figure 1 As shown, the present invention provides an intelligent EVA waste grading screening machine, comprising a support frame 1, a screening box 2 is locked and fixed on the support frame 1, and three equidistantly distributed discharge hoppers 4 are arranged at the bottom of the screening box 2, each of which is connected to the inner side of the screening box 2, and the discharge hoppers 4 are used to discharge EVA waste particles that have been graded and screened;

[0034] In this embodiment, a transparent plate 3 is embedded in the front end surface of the screening box 2 for observing the state of the screening cylinder 7 in the screening box 2;

[0035] In this embodiment, the transparent plate 3 is made of acrylic material, which has good transparency, strength and wear resistance;

[0036] like Figures 2 to 5As shown, in this embodiment, the screening box 2 is provided with a feed assembly 5 and an auxiliary mechanism 14, the feed assembly 5 is used to uniformly introduce EVA waste particles, a fixing frame 6 is locked and fixed in the screening box 2, and a pressing assembly is provided on the screening box 2, and the pressing assembly is used to apply a downward airflow to the EVA waste particles to reduce the bouncing of the EVA waste particles during grading and screening;

[0037] Three screening cylinders 7 corresponding to the discharge hoppers 4 are rotatably mounted in the fixed frame 6, and two adjacent screening cylinders 7 are movably connected, and the inner diameter of the tube body formed by the combination of each screening cylinder 7 is gradually reduced from left to right, so that the inner wall of the screening cylinder 7 forms an inclined surface, so that the EVA waste particles can be rolled and transported in the screening cylinder 7;

[0038] The fixed frame 6 is provided with a driving assembly for driving the screening drum 7 to rotate;

[0039] Three partitions 15 are installed in the screening cylinder 7 and are distributed in an annular shape at equal intervals. A screening cavity 16 is formed between two adjacent partitions 15 and the screening cylinder 7. A plurality of sieve holes 17 penetrating the side surface of the screening cylinder 7 are provided in the screening cavity 16. The sieve holes 17 are used to screen EVA waste particles. The inner diameters of the sieve holes 17 in the same screening cavity 16 are consistent, while the inner diameters of the groups of sieve holes 17 in the different screening cavities 16 are different.

[0040] The downward pressure assembly includes a blower 11 locked and fixed on the left end surface of the screening box 2, and an exhaust pipe 12 plugged into the air outlet end of the blower 11. The exhaust pipe 12 passes through the side surface of the screening box 2 and the inner side of each screening cylinder 7, and a plurality of air nozzles 13 are installed at the bottom of the exhaust pipe 12. The air nozzle 13 is used to guide the downward airflow to act on the EVA waste.

[0041] The feeding assembly 5 includes a guide cylinder 51, a feeding hopper 52 fixedly embedded in the top surface of the guide cylinder 51, a roller 53 rotatably installed in the guide cylinder 51, the roller 53 can rotate in the guide cylinder 51 to drive the pushing plate 55 to rotate through the roller 53 to push the EVA waste particles, and a feeding frame 56 arranged at the bottom of the guide cylinder 51 and fixedly embedded in the right end surface of the screening box 2;

[0042] A second motor 54 is locked and fixed to the front end surface of the guide cylinder 51. The output shaft of the second motor 54 passes through the side surface of the guide cylinder 51 and is coaxially connected to the roller 53. The second motor 54 provides driving force for the rotation of the roller 53. A plurality of push plates 55 are installed on the side surface of the roller 53 and are distributed in an annular shape at equal intervals. A feeding frame 56 extends downward from right to left, and the feeding frame 56 is connected to the inner side of the screening chamber 16 at the lower right end, so that the EVA waste particles can be guided into the screening chamber 16 at the lower right end through the feeding frame 56.

[0043] The outer diameters of the screening cylinders 7 in the fixed frame 6 are consistent, and the inner end faces of the screening cylinders 7 are parallel and connected, so that the EVA waste particles to be graded and screened can move in the screening cylinders 7;

[0044] The feed hopper 52 is tapered from top to bottom, making it easier to put the EVA waste particles into the feed hopper 52;

[0045] In this embodiment, the driving assembly includes a gear ring 8 sleeved on the screening cylinder 7, a driving gear 9 arranged on the gear ring 8 and meshing therewith, and a first motor 10 locked and fixed in the fixing frame 6, and the output shaft of the first motor 10 is connected to the inner ring of the driving gear 9;

[0046] In this embodiment, three rows of air nozzles 13 are arranged on the exhaust pipe 12, the middle row of air nozzles 13 is arranged vertically downward, and the front and rear rows of air nozzles 13 are respectively extended outwardly at an angle, so that the airflows ejected by the air nozzles 13 in different rows can exert downward pressure on the EVA waste particles at different positions;

[0047] In this embodiment, a fixed net 58 is fixedly embedded in the inner bottom of the feeding frame 56, and the fixed net 58 is flush with the inner bottom of the feeding frame 56, so that impurities on the EVA waste particles can fall down through the fixed net 58 and be discharged;

[0048] In this embodiment, a collecting frame 57 is detachably mounted on the bottom end surface of the feeding frame 56, and the fixed net 58 completely falls into the feeding frame 56, so that impurities on the EVA waste particles can be collected through the collecting frame 57, thereby reducing the subsequent cleaning workload;

[0049] Specifically, when in use, the size of the sieve holes 17 on the formed screening cylinder 7 is adjusted according to the outer diameter of different batches of EVA waste particles, and the driving gear 9 is driven to rotate by starting different first motors 10. The driving gear 9 cooperates with the gear ring 8 to drive the corresponding screening cylinder 7 to rotate, and the screening cylinder 7 drives the sieve holes 17 to rotate. When different screening chambers 16 rotate to the bottom, the sieve holes 17 of corresponding sizes rotate to the bottom, and the sieve holes 17 at the bottom are the sieve holes 17 actually used for screening EVA waste particles. When the sieve holes 17 corresponding to the transparent plate 3 on the screening box 2 are observed to face downward, the first motor 10 is stopped, and the sieve holes 17 on the right end of the screening cylinder 7 are adjusted to have the smallest aperture, and the sieve holes 17 on the left end of the screening cylinder 7 have the largest aperture, and the middle one is centered, so as to achieve more flexible and intelligent adjustment and use of the screening machine;

[0050] Then, the EVA waste particles are introduced through the feed hopper 52, and the EVA waste particles enter the feeding space formed by the push plate 55 and the guide cylinder 51. The second motor 54 is started to drive the roller 53 to rotate, and the roller 53 drives the push plate 55 to rotate. The push plate 55 drives the EVA waste particles to move in the guide cylinder 51 until the EVA waste particles move to the feeding frame 56 and are discharged downward. When the impurities on the EVA waste particles roll and fall in the guide cylinder 51, they fall downward through the fixed net 58 and are stored in the collection frame 57;

[0051] The EVA waste particles enter the screening chamber 16 at the right end through the feeding frame 56, and the smallest EVA waste particles pass through the screening chamber 16 at the right end and fall downward through the discharge hopper 4 to be discharged outward. Since the inner wall of the screening cylinder 7 is in an inclined shape, the EVA waste particles can roll in the screening cylinder 7, and the EVA waste particles with increasing outer diameters are discharged downward through the sieve holes 17 in the screening chamber 16 at the left end in turn, so as to complete the classification and screening of the EVA waste particles.

[0052] When the EVA waste particles move in the screening cylinder 7, an airflow of appropriate intensity is generated by starting the blower 11. The airflow passes through the exhaust pipe 12 and is ejected downward through the air nozzle 13 to act on the EVA waste particles. The EVA waste particles are affected by the airflow to reduce jumping, thereby improving the stability of the EVA waste particles during the screening process. The airflow can also help separate EVA waste particles that are stuck to each other to avoid clogging the sieve holes, thereby making the EVA waste particles more intelligent and efficient during the screening process.

[0053] like Figure 6 As shown, in this embodiment, the auxiliary mechanism 14 includes a suction fan 14a locked and fixed at the bottom of the left end surface of the screening box 2, and a suction pipe 14b plugged into the suction end of the suction fan 14a, the suction pipe 14b passes through the outer bottom of the screening box 2, and a plurality of suction nozzles 14c inclined upward are installed on the suction pipe 14b, and a partition net 14d connected to the inner wall of the screening box 2 is arranged outside the suction nozzle 14c, and the partition net 14d is located above the front of the discharge hopper 4;

[0054] The rear end surface of the partition net 14d is flush with the front end of the top of the discharge hopper 4 to prevent the EVA waste particles from accumulating at the front end of the partition net 14d.

[0055] Specifically, when in use, the suction fan 14a is started to generate suction, and the suction force acts on the EVA waste particles through the suction pipe 14b, the suction nozzle 14c and the sieve hole 17. The main function of the exhaust fan is to extract air, thereby creating a local negative pressure environment in the screening box 2, which can further promote air circulation, help improve the fluidity and dispersion of the EVA waste particles on the screen surface, especially when dealing with lightweight and easy-to-float EVA waste particles. It is more effective. The negative pressure can accelerate the process of particles passing through the screen, reduce blockage, and optimize the screening effect.

[0056] The present invention provides an intelligent EVA waste grading screening machine. A plurality of screening cylinders 7 are arranged in a fixed frame 6. When the sieve holes 17 on the screening cylinders 7 face downward, the sieve holes 17 can screen EVA waste of corresponding sizes. The outer diameters of the sieve holes 17 on each screening cylinder 7 are different. Rotating different screening cylinders 7 changes the size combination of the downward sieve holes 17, which is conducive to more intelligent response to EVA waste of different batches and sizes and improves the flexibility of the screening machine.

[0057] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent EVA waste grading screening machine, comprising a support frame, a screening box is installed on the support frame, and a plurality of discharge hoppers are arranged at the bottom of the screening box, and each discharge hopper is connected to the inner side of the screening box; It is characterized in that The screening box is provided with a feeding assembly and an auxiliary mechanism, a fixing frame is detachably installed in the screening box, and a pressing assembly is provided on the screening box; A plurality of screening cylinders corresponding to the discharge hoppers are rotatably mounted in the fixed frame, two adjacent screening cylinders are movably connected, and the inner diameter of the tube body formed by the combination of the screening cylinders gradually decreases from one end to the other end; The fixed frame is provided with a driving assembly for driving the screening drum to rotate; A plurality of partitions are installed in the screening cylinder and are distributed in an annular shape with equal intervals. A screening cavity is formed between two adjacent partitions and the screening cylinder. A plurality of sieve holes are opened in the screening cavity and pass through the side surface of the screening cylinder. The inner diameters of the sieve holes in the same screening cavity are the same, while the inner diameters of the groups of sieve holes in different screening cavities are different. The down-pressure assembly includes a blower installed on the side surface of the screening box, an exhaust pipe plugged into the air outlet of the blower, the exhaust pipe runs through the side surface of the screening box and the inner side of each screening cylinder, and a plurality of air nozzles are installed at the bottom of the exhaust pipe, and the air nozzles are used to guide the downward airflow to act on the EVA waste; The feeding assembly includes a guide cylinder, a feeding hopper fixedly embedded on the guide cylinder, a roller rotatably installed in the guide cylinder, and a feeding frame arranged at the bottom of the guide cylinder and fixedly embedded in the side surface of the screening box. The side surface of the guide cylinder is detachably mounted with a second motor, and the output shaft of the second motor passes through the side surface of the guide cylinder and is coaxially connected with the roller. The side surface of the roller is mounted with a plurality of push plates distributed in an annular shape with equal spacing, and the feeding frame is connected with the inner side of the screening cavity at the lower right end; The auxiliary mechanism includes a suction fan installed on the side surface of the screening box, and an air suction pipe plugged into the suction end of the suction fan. The air suction pipe runs through the outer bottom of the screening box, and a plurality of air suction nozzles are installed on the air suction pipe. A partition net connected to the inner wall of the screening box is arranged outside the air suction nozzle, and the partition net is located above the front of the discharge hopper.

2. According to claim 1, an intelligent EVA waste grading screening machine is characterized in that: A transparent plate is embedded in the front end surface of the screening box for observing the state of the screening cylinder in the screening box.

3. According to claim 1, the intelligent EVA waste grading screening machine is characterized by: The driving assembly comprises a gear ring sleeved on the screening cylinder, a driving gear arranged on the gear ring and meshing with the gear ring, and a first motor installed in a fixed frame, wherein the output shaft of the first motor is connected to the inner ring of the driving gear.

4. According to claim 1, the intelligent EVA waste grading screening machine is characterized by: The outer diameters of the screening cylinders in the fixed frame are consistent, and the inner end surfaces of the screening cylinders are parallel and connected.

5. According to claim 1, the intelligent EVA waste grading screening machine is characterized by: The exhaust pipe is provided with three rows of air nozzles, the middle row of air nozzles is vertically arranged downward, and the front and rear rows of air nozzles are inclined to extend outwards respectively.

6. The intelligent EVA waste grading screening machine according to claim 1 is characterized by: A fixing net is fixedly embedded in the inner bottom of the feeding frame, and the fixing net is flush with the inner bottom of the feeding frame.

7. The intelligent EVA waste grading screening machine according to claim 6, characterized in that: The bottom end surface of the feeding frame is detachably mounted with a collecting frame, and the fixed net completely falls into the feeding frame.

8. The intelligent EVA waste grading screening machine according to claim 1, characterized in that: The feeding hopper is in a shape of gradually contracting from top to bottom.

9. The intelligent EVA waste grading screening machine according to claim 1, characterized in that: The rear end surface of the partition net is flush with the front end of the top of the discharge hopper.

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