Automatic sorting mechanism and sorting method for wire rod mill waste

Abstract

The application relates to the technical field of sorting machines, in particular to a wire rolling mill waste automatic sorting mechanism and a sorting method. The mechanism comprises a chassis, a sorting frame slidably connected to the chassis, three sieve frame supports slidably connected to the sorting frame, an outer sieve cylinder, a middle sieve cylinder and an inner sieve cylinder rotatably connected to the three sieve frame supports respectively, the inner sieve cylinder, the middle sieve cylinder and the outer sieve cylinder being coaxially arranged and sequentially sleeved from inside to outside, a vibration driving unit being installed on each of the three sieve frame supports and used for driving the sieve frame support to vibrate in a direction perpendicular to the axis of the outer sieve cylinder, three sieve material collecting cylinders being fixedly arranged on the chassis and respectively communicated with the tail ends of the outer sieve cylinder, the middle sieve cylinder and the inner sieve cylinder, a feeding shaft coaxially installed on the inner sieve cylinder, a feeding cylinder rotatably communicated with the front end of the inner sieve cylinder, and the feeding cylinder being fixedly connected with the sieve frame support corresponding to the inner sieve cylinder. The application has the beneficial effect that dynamic and accurate matching between sorting parameters and real-time feeding characteristics can be realized.

Description

Technical Field

[0001] This invention relates to the field of sorting machine technology, specifically to an automatic sorting mechanism and method for waste materials from wire rod mills. Background Technology

[0002] Currently, the industry commonly uses conventional screening equipment such as drum screens and linear vibrating screens for the sorting and processing of wire rod mill waste. Some solutions use multi-stage nested drum screens to achieve graded screening of waste. The above-mentioned existing technical solutions can achieve basic graded screening of conventional steady-state materials, but they have many insurmountable technical defects for the unique characteristics of wire rod mill waste, as follows:

[0003] Existing sorting equipment cannot adapt to the strong dynamic fluctuations in the characteristics of waste feed during wire rod mill production. It uses fixed and unadjustable screening operating parameters and lacks real-time monitoring of feed characteristics and closed-loop adaptive control of sorting parameters. As a result, the equipment cannot simultaneously achieve sorting efficiency and sorting accuracy, which can easily lead to a chain of failures such as material blockage, screen hole blockage, and insufficient sorting. It cannot meet the synchronous operation requirements of continuous production in wire rod mills. At the same time, the existing screening equipment can only achieve a single rotation or vibration screening action due to the highly irregular shape of wire rod mill waste and its tendency to be entrained and agglomerated by rolling emulsion and lubricating grease. It cannot effectively break up waste agglomerates, which can easily lead to problems such as irregular waste jamming, accumulation and bridging, and screen hole blockage. This results in poor equipment screening continuity and high operation and maintenance costs.

[0004] Based on this, the present invention provides an automatic sorting mechanism and sorting method for wire rod mill scrap to solve the problems mentioned in the background art. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing an automatic sorting mechanism and method for wire rod mill scrap. This solves the problems that existing wire rod mill scrap sorting equipment cannot adapt to the strong dynamic fluctuations in scrap feed characteristics during wire rod mill production, lacks real-time monitoring of feed characteristics and closed-loop adaptive control of sorting parameters, adopts a screening mode with fixed operating parameters, cannot simultaneously balance sorting efficiency and sorting accuracy, and cannot meet the synchronous operation requirements of continuous wire rod mill production.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An automatic sorting mechanism for waste from a wire rod mill, comprising a base frame, and further comprising:

[0007] The sorting frame is slidably connected to the base frame. Three vibrating screen frames are slidably connected to the sorting frame. An outer screen cylinder, a middle screen cylinder, and an inner screen cylinder are rotatably connected to the three vibrating screen frames respectively. The inner screen cylinder, the middle screen cylinder, and the outer screen cylinder are coaxially arranged and nested from the inside to the outside. Each of the three vibrating screen frames is equipped with a vibration drive unit that drives the vibrating screen frame to vibrate in a direction perpendicular to the axis of the outer screen cylinder. Three screening material collection cylinders are fixedly installed on the base frame. The three screening material collection cylinders are respectively connected to the tail ends of the outer screen cylinder, the middle screen cylinder, and the inner screen cylinder.

[0008] The feed shaft is coaxially mounted on the inner screen cylinder. The front end of the inner screen cylinder is rotatably connected to the feed cylinder. The feed cylinder is fixedly connected to the vibrating screen frame corresponding to the inner screen cylinder. The top of the feed cylinder is connected to the feed hopper. The feed shaft is equipped with a spiral conveyor blade.

[0009] The image acquisition module is fixedly mounted on the sorting rack and positioned opposite the feed hopper;

[0010] The central control unit is connected to the image acquisition module and is configured to synchronously adjust the vibration frequency of the three vibrating screen frames and adjust the vibration amplitude of the three vibrating screen frames respectively based on the data feedback from the image acquisition module.

[0011] The variable-stroke material uniform unit is configured to make the sorting frame alternately reciprocate along the axial direction of the outer screen cylinder with three different reciprocating strokes;

[0012] The transmission unit is configured as follows:

[0013] Drives the inner screen cylinder to reciprocate asymmetrically;

[0014] Drive the outer sieve cylinder and the middle sieve cylinder to rotate coaxially in opposite directions;

[0015] Drive the feed shaft to rotate in a specific direction.

[0016] Based on the above technical solution, the present invention can be further improved as follows.

[0017] Preferably, the outer sieve cylinder, the middle sieve cylinder, and the inner sieve cylinder are all hollow cylindrical structures with open tail ends. Screening holes are arrayed on the outer circumferential surfaces of the outer sieve cylinder, the middle sieve cylinder, and the inner sieve cylinder. The diameter of the screening holes on the outer sieve cylinder, the middle sieve cylinder, and the inner sieve cylinder increases progressively. The angle between the axis of the outer sieve cylinder and the horizontal plane is 8°.

[0018] Preferably, the transmission unit includes a servo motor fixed on the base frame, a synchronous shaft, a reciprocating shaft, and two gear shafts rotatably connected to the base frame. A transmission belt is driven onto the synchronous shaft, and both gear shafts are driven by the transmission belt. One gear shaft has a sleeve hole. A drive shaft is mounted on the output shaft end of the servo motor. The drive shaft has a splined section that slidably connects to the sleeve hole. Each of the two gear shafts has a rotating wheel. Along the circumferential direction, the rotating wheel alternately has two sector-shaped gear transmission sections and two smooth arc sections. The center angles corresponding to the effective meshing arc sections on the two sector-shaped gear transmission sections are different. The reciprocating shaft is rotatably connected to the base frame. A rotary torsion spring is provided at the location. A reciprocating gear adapted to mesh with the sector gear transmission section is installed on the reciprocating shaft. A first elastic synchronous belt is connected between the reciprocating shaft and the inner screen cylinder. Both the inner and outer screen cylinders are connected to the synchronous shaft. A first coupling and a second coupling are rotatably connected on the base frame. A second bevel gear is installed on both the first and second couplings. The two second bevel gears mesh orthogonally. A second elastic synchronous belt is connected to the synchronous shaft. The feed shaft and the first coupling are both connected to the second elastic synchronous belt. A third elastic synchronous belt is connected to the second coupling. All three vibration drive units are connected to the third elastic synchronous belt.

[0019] Preferably, a counter-rotating sleeve is rotatably sleeved on the synchronous shaft, a steering shaft is rotatably connected to the base frame, side bevel gears are installed on both the counter-rotating sleeve and the synchronous shaft, a steering bevel gear is fixedly mounted on the steering shaft, both side bevel gears are drivenly connected to the steering bevel gear, the two side bevel gears are symmetrically arranged about the vertical plane containing the axis of the steering bevel gear, and two fourth elastic synchronous belts are drivenly connected to the synchronous shaft, the two fourth elastic synchronous belts are drivenly connected to the inner screen cylinder and the outer screen cylinder respectively.

[0020] Preferably, the cross-sections of the spline segment and the sleeve hole are both regular hexagons, the first elastic synchronous belt, the second elastic synchronous belt, the third elastic synchronous belt and the fourth elastic synchronous belt are all made of elastic rubber, the installation phase difference between the two rollers and the base frame is 95°, and the two rollers are respectively arranged on the upper and lower sides of the reciprocating gear.

[0021] Preferably, the variable-range material leveling unit includes a variable-range rotating wheel rotatably connected to the base frame. A first bevel gear is installed on both the drive shaft and the variable-range rotating wheel. The two first bevel gears mesh orthogonally along the circumferential direction. Three pushing protrusions are arrayed on the variable-range rotating wheel. The eccentricity of the three pushing protrusions is different from that of each other. A roller is rotatably installed on the sorting frame. When the drive shaft rotates, the outer circumferential surfaces of the three pushing protrusions alternately roll and connect with the wheel surface of the roller. Two return springs are installed between the sorting frame and the base frame.

[0022] Preferably, the vibration drive unit includes a linear transmission module fixed on the base frame, a spindle rotatably connected to the base frame, and a vibrating guide wheel rotatably connected to the vibrating screen frame. An amplitude frame is driven and connected to the linear transmission module. A variable eccentricity cylindrical cam is rotatably mounted on the amplitude frame. The outer wheel surface of the variable eccentricity cylindrical cam is in rolling connection with the wheel surface of the vibrating guide wheel. Along the axial direction, the eccentricity of the variable eccentricity cylindrical cam decreases linearly. A shaft hole is opened at the axial position of the variable eccentricity cylindrical cam to be slidably connected to the spindle. The spindle is driven and connected to a third elastic synchronous belt. Two re-vibration springs are installed on the bottom surface of the vibrating screen frame. The bottom ends of the two re-vibration springs are fixedly connected to the sorting frame.

[0023] Preferably, the wheel surface width of the variable eccentricity cylindrical cam is 7 to 10 times the wheel surface width of the vibrating guide wheel, and the cross-sections of the shaft hole and the mandrel are both regular hexagons.

[0024] Preferably, the bottom of each of the three screening cylinders is connected to a discharge pipe, and a collection hopper is fixedly installed on the base frame at a position directly below the outer screening cylinder, with a screening discharge pipe connected to the bottom of the collection hopper.

[0025] Preferably, a sorting method for an automatic waste sorting mechanism for wire rod mills includes the following steps:

[0026] SS1 drives the feed shaft to rotate in a specific direction, continuously and quantitatively feeding wire mill scrap into the inner screen cylinder through the feed hopper;

[0027] SS2 collects image data of the feed waste, identifies the characteristics of the waste, and adjusts the vibration frequency of the three vibrating screens synchronously and independently according to the identification results.

[0028] SS3 drives the inner screen cylinder to perform asymmetrical reciprocating rotation, drives the outer screen cylinder and the middle screen cylinder to perform coaxial and opposite continuous rotation, and simultaneously drives the three vibrating screen frames to drive the corresponding inner screen cylinder, middle screen cylinder and outer screen cylinder to perform high-frequency radial vibration in a direction perpendicular to their respective axes, and drives the sorting frame to drive the inner screen cylinder, middle screen cylinder and outer screen cylinder to perform alternating reciprocating motion along their axial direction with three different reciprocating strokes.

[0029] In SS4, the waste material undergoes the first stage of screening in the inner screen cylinder. Waste material with a particle size smaller than the screening holes of the inner screen cylinder falls into the middle screen cylinder, where it undergoes the second stage of screening. Waste material with a particle size smaller than the screening holes of the middle screen cylinder falls into the outer screen cylinder, where it undergoes the third stage of screening. Waste material with a particle size smaller than the screening holes of the outer screen cylinder is discharged and collected. The waste material remaining in each stage of the screen cylinder is discharged and collected from the tail end.

[0030] The beneficial effects of this invention are:

[0031] 1. This invention uses an image acquisition module installed in the opposing feed hopper to collect image data of the feed waste in real time. This allows for accurate identification of key feed characteristics such as particle size distribution, proportion of large-diameter lumps, oil sludge content, and non-metallic impurity content. The data is transmitted to the central control unit in real time. Based on a preset sorting algorithm, the central control unit synchronously adjusts the vibration frequency of the corresponding vibrating screen frames in the three-stage screen cylinder. Furthermore, the vibration drive unit independently and steplessly adjusts the amplitude of each of the three vibrating screen frames, enabling the matching of large-diameter lumpy waste within the inner screen cylinder with a large amplitude and low frequency. The vibration parameters are matched with small amplitude and high frequency vibration parameters for small-diameter debris in the outer screen cylinder, so as to achieve dynamic and precise matching between sorting parameters and real-time feeding characteristics. Compared with the screening mode with fixed operating parameters in the existing technology, the present invention realizes the full closed-loop adaptive control of the wire rod mill waste sorting process, avoids the chain failures such as material blockage, screen hole blockage, and insufficient sorting caused by feed fluctuations, and can adapt to the synchronous operation requirements of continuous production of wire rod mill without the need for additional buffer feeding links, thus simplifying the process flow of wire rod mill waste treatment.

[0032] 2. This invention utilizes a transmission unit driven by a single servo motor to simultaneously achieve a multi-dimensional composite sorting action: asymmetrical reciprocating rotation of the inner screen cylinder, coaxial and counter-rotating continuous rotation of the outer and middle screen cylinders, high-frequency radial vibration of the three-stage screen cylinders, and axial reciprocating uniform material mixing driven by the sorting frame. These actions create a deep, synergistic effect, fundamentally different from the single-action sorting techniques of existing technologies. Specifically, the asymmetrical reciprocating rotation of the inner screen cylinder generates alternating circumferential tumbling torque for large-particle-size irregular waste, effectively solving the problems of bridging of lumpy waste and axial jamming of long, strip-shaped cut-off pieces. The coaxial counter-rotating rotation of the outer and middle screen cylinders generates reverse shearing force between adjacent screen cylinders, effectively breaking up sludge clumps of small-to-medium-sized waste, allowing for the complete separation of metal fragments and impurities encased within the material clumps. The high-frequency radial vibration ensures that the screen cylinders at each stage... The waste material is in a continuously loose and jumping state, breaking up the sticky state of the waste material and increasing the contact probability between the waste material and the screening holes. The variable-range axial reciprocating motion can achieve uniform material distribution throughout the cylinder, avoiding the problems of accumulation at the feed end and idle screen sections at the discharge end. At the same time, it can help the waste material stuck in the screening holes to be quickly removed. The coordinated action of multiple dimensions allows the waste material to be subjected to the combined forces of circumferential alternating tumbling, radial high-frequency vibration, and axial variable-range movement. This can not only fully break up various types of waste material agglomerates and separate small and medium-sized waste material and metal fragments wrapped in sludge, but also avoid problems such as screening hole blockage and waste material jamming in all aspects. While further improving the sorting efficiency, it significantly improves the accuracy and recycling purity of waste material classification and sorting, and reduces the operation and maintenance costs of the equipment, which has significant technological progress and creative value. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an automatic waste sorting mechanism for wire rod mills according to the present invention;

[0034] Figure 2 For the present invention Figure 1 A structural diagram from another perspective;

[0035] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0036] Figure 4 For the present invention Figure 2 A magnified view of the structure at point B in the middle;

[0037] Figure 5 This is a schematic cross-sectional view of the outer screen cylinder of the present invention;

[0038] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the local structure at point C;

[0039] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the local structure at point D;

[0040] Figure 8 This is a schematic diagram of the synchronous shaft and rollers of the present invention;

[0041] Figure 9 For the present invention Figure 8 A structural diagram from another perspective;

[0042] Figure 10 This is a schematic diagram of the variable-range rotary wheel of the present invention.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Base frame; 2. Sorting frame; 3. Vibrating screen frame; 4. Outer screen cylinder; 5. Middle screen cylinder; 6. Inner screen cylinder; 7. Screening material collection cylinder; 8. Central control unit; 9. Servo motor; 101. Variable stroke rotary wheel; 102. Pushing protrusion; 103. Roller; 104. Return spring; 105. Linear transmission module; 106. Mandrel; 107. Vibrating guide wheel; 108. Amplitude frame; 109. Variable eccentricity cylindrical cam; 110. Re-vibration spring; 111. Collection hopper; 112. Screening material discharge pipe; 601. Feed shaft; 602. Feeding cylinder; 60 3. Feed hopper; 604. Spiral conveyor blade; 701. Discharge pipe; 901. Synchronous shaft; 902. Reciprocating shaft; 903. Gear shaft; 904. Transmission belt; 905. Drive shaft; 906. Rotary wheel; 907. Sector gear transmission section; 908. Rotary torsion spring; 909. Reciprocating gear; 910. First elastic synchronous belt; 911. First coupling; 912. Second coupling; 913. Second elastic synchronous belt; 914. Third elastic synchronous belt; 915. Reverse sleeve; 916. Steering shaft; 917. Fourth elastic synchronous belt. Detailed Implementation

[0045] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0046] The present invention provides the following preferred embodiments.

[0047] like Figure 1-10 As shown, an automatic waste sorting mechanism for wire rod mills includes a base frame 1, and further includes:

[0048] The sorting rack 2 is slidably connected to the base frame 1. Specifically, the base frame 1 has two second rail grooves and a first guide rail is fixedly installed. The bottom surface of the sorting rack 2 has two second guide rails and a first rail groove. The two second guide rails are slidably connected to the two second rail grooves respectively, and the first guide rail is slidably connected to the first rail groove.

[0049] Three vibrating screen frames 3 are slidably connected to the sorting frame 2. An outer screen cylinder 4, a middle screen cylinder 5, and an inner screen cylinder 6 are rotatably connected to the three vibrating screen frames 3 respectively. The inner screen cylinder 6, the middle screen cylinder 5, and the outer screen cylinder 4 are coaxially arranged and nested from the inside to the outside. The outer screen cylinder 4, the middle screen cylinder 5, and the inner screen cylinder 6 are all hollow cylindrical structures with open tail ends. Screening holes are arrayed on the outer circumferential surface of the outer screen cylinder 4, the middle screen cylinder 5, and the inner screen cylinder 6. The diameter of the screening holes on the outer screen cylinder 4, the middle screen cylinder 5, and the inner screen cylinder 6 increases progressively. The angle between the axis of the outer screen cylinder 4 and the horizontal plane is 8°.

[0050] During operation, the mixed waste is fed into the innermost inner screen cylinder 6 through the feeding mechanism. As the inner screen cylinder 6 rotates and vibrates, waste with a particle size smaller than the screening holes of the inner screen cylinder 6 passes through the screening holes and falls into the middle screen cylinder 5. Waste with a particle size smaller than the screening holes of the middle screen cylinder 5 continues to pass through the screening holes and falls into the outer screen cylinder 4. Ultrafine waste and impurities with a particle size smaller than the screening holes of the outer screen cylinder 4 directly pass through the screening holes of the outer screen cylinder 4 and fall into the lower collection hopper 111. Waste that does not conform to the particle size is retained in each level of screen cylinder and slides down the 8° inclined cylinder body to the tail end, and finally enters the corresponding screen collection cylinder 7 to complete the graded collection.

[0051] An 8° tilt angle ensures that the waste stays in the drum for the required sorting accuracy, avoiding the waste from falling too quickly and causing insufficient sorting, while also avoiding the problem of waste accumulating and clogging due to an angle that is too small.

[0052] Each of the three vibrating screen frames 3 is equipped with a vibration drive unit that drives the vibrating screen frame 3 to vibrate in a direction perpendicular to the axis of the outer screen cylinder 4. Three screen material collection cylinders 7 are fixed on the base frame 1, and the three screen material collection cylinders 7 are respectively connected to the tail ends of the outer screen cylinder 4, the middle screen cylinder 5 and the inner screen cylinder 6.

[0053] The bottom of each of the three screening cylinders 7 is connected to a discharge pipe 701. A collection hopper 111 is fixed on the base frame 1 at the position directly below the outer screen cylinder 4. The bottom of the collection hopper 111 is connected to a screening discharge pipe 112.

[0054] The three vibration drive units can drive the corresponding vibrating screen frame 3 to vibrate at high frequency in a direction perpendicular to the screen cylinder axis, thereby causing the corresponding screen cylinder to vibrate radially, so that the waste in the screen cylinder is in a continuous loose and jumping state, breaking the accumulation and sticking state of the waste, avoiding the clogging of the screening holes, while increasing the contact probability between the waste and the screening holes, and enhancing the grading and sorting efficiency.

[0055] Waste materials that have been graded in each screen cylinder are directly discharged into the corresponding independent screen collection cylinder 7 at the tail end, and discharged at a fixed point through the discharge pipe 701. Meanwhile, ultrafine waste materials and impurities that pass through the outer screen cylinder 4 fall directly into the collection hopper 111 and are discharged in a concentrated manner through the screen discharge pipe 112.

[0056] The variable-stroke uniform material unit is configured to make the sorting frame 2 reciprocate alternately with three different reciprocating strokes along the axial direction of the outer screen cylinder 4;

[0057] The feed shaft 601 is coaxially mounted on the inner screen cylinder 6. The front end of the inner screen cylinder 6 is rotatably connected to the feed cylinder 602. The feed cylinder 602 is fixedly connected to the vibrating screen frame 3 corresponding to the inner screen cylinder 6. The top of the feed cylinder 602 is connected to the feed hopper 603. The feed shaft 601 is equipped with a spiral conveyor blade 604. The outer circumferential surface of the spiral conveyor blade 604 is in contact with the feed cylinder 602.

[0058] Image acquisition module 10 is fixedly mounted on sorting frame 2 and positioned opposite to feed hopper 603;

[0059] The central control unit 8 is connected to the image acquisition module 10 and is configured to synchronously adjust the vibration frequency of the three vibrating screen frames 3 and adjust the vibration amplitude of the three vibrating screen frames 3 respectively based on the data feedback from the image acquisition module 10.

[0060] During operation, the image acquisition module 10 acquires image data of the mixed waste entering through the feed hopper 603 in real time, identifies the particle size distribution, block material ratio, and impurity content of the waste, and transmits the data to the central control unit 8 in real time. The central control unit 8 adjusts the vibration frequency of the three vibrating screen frames 3 synchronously based on the preset sorting algorithm, and independently adjusts the amplitude of the vibrating screen frame 3 corresponding to each screen cylinder.

[0061] When the proportion of large-diameter blocks in the feed is high, the amplitude and frequency of the vibration of the inner screen cylinder 6 corresponding to the vibrating screen frame 3 are increased to enhance the conveying and sorting efficiency of large-diameter waste.

[0062] When the proportion of fine debris and dust in the feed is high, increase the amplitude and frequency of the vibration of the outer screen cylinder 4 corresponding to the vibrating screen frame 3 to avoid fine powder clogging the screening holes and improve the fine material sorting accuracy.

[0063] Compared with existing sorting equipment with fixed parameters, this invention realizes closed-loop adaptive control of the wire rod mill scrap sorting process. It can dynamically match the optimal vibration sorting parameters according to the real-time feeding characteristics, solving the problems of large fluctuations in wire rod mill scrap feeding and the inability of fixed sorting parameters to balance sorting efficiency and accuracy.

[0064] Meanwhile, the visualized feeding monitoring can realize real-time early warning of abnormal waste feeding. When the image acquisition module 10 is working, a real-time air jet structure can be set on its mirror surface to realize the self-cleaning of the mirror surface of the image acquisition module 10.

[0065] Furthermore, the image acquisition module 10 should be periodically cleaned manually during operation to maintain the data acquisition accuracy and precision of the image acquisition module 10.

[0066] The transmission unit is configured as follows:

[0067] Drive the inner screen cylinder 6 to reciprocate asymmetrically;

[0068] Drive the outer screen cylinder 4 and the middle screen cylinder 5 to rotate coaxially and in opposite directions;

[0069] Drive the feed shaft 601 to rotate in a specific direction.

[0070] The transmission unit includes a servo motor 9 fixed on the base frame 1, a synchronous shaft 901 rotatably connected to the base frame 1, a reciprocating shaft 902 and two gear shafts 903. A transmission belt 904 is driven to the synchronous shaft 901, and both gear shafts 903 are driven to the transmission belt 904. A sleeve hole is opened on one gear shaft 903. A drive shaft 905 is installed on the output shaft end of the servo motor 9. A spline section is provided on the drive shaft 905 and slidably connected to the sleeve hole. In this embodiment, the cross-section of the spline section and the sleeve hole are both regular hexagons.

[0071] Two gear shafts 903 are each equipped with a rotating wheel 906. Along the circumferential direction, the rotating wheel 906 is alternately provided with two sector-shaped gear transmission sections 907 and two smooth arc sections. The center angles corresponding to the effective meshing arc sections on the two sector-shaped gear transmission sections 907 are different from each other.

[0072] In a preferred embodiment, the central angles of the two sector tooth transmission segments 907 are 100° and 60°, respectively, and the central angles of the two smooth arc segments are both 100°.

[0073] A rotary torsion spring 908 is provided at the rotatable connection between the reciprocating shaft 902 and the base frame 1, and a reciprocating gear 909 adapted to mesh with the sector gear transmission section 907 is installed on the reciprocating shaft 902.

[0074] The two rotating wheels 906 are installed with a phase difference of 95° relative to the base frame 1, and the two rotating wheels 906 are respectively set on the upper and lower sides of the reciprocating gear 909;

[0075] A first elastic synchronous belt 910 is used to drive the reciprocating shaft 902 and the inner screen cylinder 6.

[0076] By setting the tooth ratio and radius ratio of the two sector tooth transmission sections 907 and the reciprocating gear 909, the inner screen cylinder 6 can rotate 2.5 turns clockwise when the 100° sector tooth transmission section 907 meshes with the reciprocating gear 909, and the inner screen cylinder 6 can rotate 1.5 turns counterclockwise when the 60° sector tooth transmission section 907 meshes with the reciprocating gear 909.

[0077] During operation, the servo motor 9 drives the two gear shafts 903 to rotate synchronously, which in turn drives the two rotating wheels 906 with a phase difference of 95° to rotate synchronously. The sector gear transmission section 907 on the rotating wheel 906 alternately meshes with the reciprocating gear 909.

[0078] When the 100° central angle sector tooth transmission section 907 of one of the rotating wheels 906 meshes with the reciprocating gear 909, it drives the reciprocating gear 909 to drive the reciprocating shaft 902 to rotate clockwise against the elastic force of the rotary torsion spring 908. In turn, it drives the inner screen cylinder 6 to rotate clockwise 2.5 times through the first elastic synchronous belt 910. When the sector tooth transmission section 907 disengages from the reciprocating gear 909, the rotary torsion spring 908 drives the reciprocating shaft 902 and the inner screen cylinder 6 to quickly return to their original positions. At the same time, the 60° central angle sector tooth transmission section 907 of the other rotating wheel 906 meshes with the reciprocating gear 909, driving the reciprocating gear 909 to drive the inner screen cylinder 6 to rotate counterclockwise 1.5 times. This cycle realizes the asymmetrical reciprocating rotation of the inner screen cylinder 6.

[0079] The waste generated during the wire rolling mill production process is extremely irregular in shape, has a large size range, and is prone to sticking and clumping due to the rolling emulsion and lubricating grease.

[0080] The asymmetric reciprocating rotation structure adopted by the inner screen cylinder 6 can, on the one hand, form an alternating forward and reverse circumferential tumbling torque with an asymmetric rotation speed and number of rotations for irregular blocky waste such as large-diameter mill head and tail cuts, short scrap, and die flash that are processed in the core of the inner screen cylinder 6. This solves the problems of sliding jamming, accumulation and bridging of irregular blocky waste in the 8° inclined cylinder. On the other hand, it avoids the problems of long strip-shaped mill head cuts easily getting stuck along the cylinder axis and blocky waste easily forming stable accumulation rings that cause large-area obstruction of the screening holes under conventional unidirectional rotation structures.

[0081] Meanwhile, the asymmetrical forward and reverse rotation strokes allow the waste to form irregular jumping and tumbling inside the cylinder, further breaking up the accumulation of waste and increasing the contact probability between each surface of the blocky waste and the screening holes of the inner screen cylinder 6. This allows small and medium-sized waste trapped in the gaps between large pieces of material to quickly detach and pass through the screening holes to enter the next stage of sorting, solving the problems of small and medium-sized waste easily being trapped and insufficient grading purity during the sorting of large-sized waste in wire rolling mills.

[0082] The alternating shear torque generated by the asymmetric reciprocating rotation can effectively break up the scrap agglomerates formed by rolling emulsion and lubricating grease in the wire rod mill. This allows the metal fragments encased within the agglomerates to be fully separated from iron oxide scale and non-metallic impurities, preventing the problem of sludge agglomerates sticking to the screen and clogging the screening holes. At the same time, the asymmetric rotation rhythm can adapt to the fluctuating characteristics of scrap feed during continuous production in the wire rod mill. When the head and tail of the wire rod are fed in concentrated batches, the alternating forward and reverse rotation can quickly disperse the large pieces of scrap that have entered in concentrated batches. To avoid material blockage inside the cylinder caused by a large instantaneous feed, the sorting process is synchronized and continuous with the wire rolling mill process. There is no need to set up an additional buffer feeding link, which simplifies the process flow of waste handling in the wire rolling mill. In addition, the asymmetric reciprocating rotary structure can form a three-dimensional linkage compound sorting action with the radial high-frequency vibration and axial variable stroke reciprocating motion of the screen cylinder. This causes the waste in the inner screen cylinder 6 to be subjected to the compound force of circumferential alternating tumbling, radial high-frequency vibration, and axial variable stroke at the same time, which further enhances the loosening effect and sorting efficiency of the waste.

[0083] Both the inner screen cylinder 6 and the outer screen cylinder 4 are connected to the synchronous shaft 901 for transmission.

[0084] A counter-rotating sleeve 915 is rotatably sleeved on the synchronous shaft 901, and a steering shaft 916 is rotatably connected to the base frame 1. Both the counter-rotating sleeve 915 and the synchronous shaft 901 are equipped with side bevel gears, and a steering bevel gear is fixedly mounted on the steering shaft 916. Both side bevel gears are driven by the steering bevel gear. The two side bevel gears are symmetrically arranged about the vertical plane where the axis of the steering bevel gear is located. Two fourth elastic synchronous belts 917 are driven by the synchronous shaft 901. The two fourth elastic synchronous belts 917 are driven by the inner screen cylinder 6 and the outer screen cylinder 4, respectively.

[0085] Servo motor 9 drives synchronous shaft 901 to rotate in a directional manner. Synchronous shaft 901 drives two symmetrically arranged side bevel gears to rotate in the opposite direction through steering bevel gear, which in turn drives anti-rotation sleeve 915 to form a coaxial and opposite rotational motion with synchronous shaft 901. Then, through two sets of fourth elastic synchronous belts 917, the rotational power of synchronous shaft 901 and anti-rotation sleeve 915 is transmitted to outer screen cylinder 4 and middle screen cylinder 5 respectively, realizing coaxial and opposite continuous rotation of outer screen cylinder 4 and middle screen cylinder 5.

[0086] The coaxial reverse rotation structure of the middle screen cylinder 5 and the outer screen cylinder 4 causes the waste in the middle screen cylinder 5 and the outer screen cylinder 4 to move in opposite circumferential relative directions, which improves the loosening effect of medium and small particle size waste, avoids fine debris and dust adhering to the inner wall of the screen cylinder and causing clogging of the screening holes, and at the same time generates reverse shearing force between adjacent screen cylinders, which can break up the clumps and oil sludge in the waste, and fully separate the metal fragments and impurities wrapped in the clumps, thereby improving the sorting accuracy and purity.

[0087] The base frame 1 is rotatably connected to a first coupling 911 and a second coupling 912. A second bevel gear is installed on both the first coupling 911 and the second coupling 912. The two second bevel gears mesh orthogonally. A second elastic synchronous belt 913 is driven to the synchronous shaft 901. The feed shaft 601 and the first coupling 911 are both driven to the second elastic synchronous belt 913. A third elastic synchronous belt 914 is driven to the second coupling 912. All three vibration drive units are driven to the third elastic synchronous belt 914.

[0088] The first elastic synchronous belt 910, the second elastic synchronous belt 913, the third elastic synchronous belt 914 and the fourth elastic synchronous belt 917 are all made of elastic rubber.

[0089] The output power of the servo motor 9 is transmitted to the synchronous shaft 901 via the drive shaft 905. Then, through the second elastic synchronous belt 913, it drives the feed shaft 601 and the first coupling 911 to rotate in a specific direction. The feed shaft 601 drives the spiral conveyor blade 604 to rotate to complete the uniform feeding of waste. The first coupling 911 drives the second coupling 912 to rotate in reverse direction through the orthogonally meshing second bevel gear. Then, through the third elastic synchronous belt 914, the power is synchronously transmitted to the three vibration drive units to realize the synchronous drive of the vibration sorting action. At the same time, it cooperates with the first elastic synchronous belt 910 and the fourth elastic synchronous belt 917 to realize the power transmission of the reciprocating rotation of the inner screen cylinder 6 and the counter-rotation of the outer screen cylinder 4 and the middle screen cylinder 5, respectively.

[0090] Based on the above technical solution, the present invention can be further improved as follows.

[0091] The vibration drive unit includes a linear transmission module 105 fixed on the base frame 1, a spindle 106 rotatably connected to the base frame 1, and a vibration guide wheel 107 rotatably connected to the vibrating screen frame 3. An amplitude frame 108 is connected to the linear transmission module 105.

[0092] In this embodiment, the linear transmission module 105 is a lead screw and nut pair;

[0093] A variable eccentricity cylindrical cam 109 is rotatably mounted on the amplitude frame 108. The outer wheel surface of the variable eccentricity cylindrical cam 109 is in rolling connection with the wheel surface of the vibrating guide wheel 107. Along the axial direction, the eccentricity of the variable eccentricity cylindrical cam 109 decreases linearly. A shaft hole is opened at the axial position of the variable eccentricity cylindrical cam 109 to be slidably connected to the spindle 106. The spindle 106 is connected to the third elastic synchronous belt 914 for transmission. Two re-vibration springs 110 are installed on the bottom surface of the vibrating screen frame 3. The bottom ends of the two re-vibration springs 110 are fixedly connected to the sorting frame 2.

[0094] The wheel surface width of the variable eccentricity cylindrical cam 109 is 7 to 10 times, preferably 9 times, the wheel surface width of the vibrating guide wheel 107. The cross-sections of the shaft hole and the spindle 106 are both regular hexagons.

[0095] Driven by the third elastic synchronous belt 914, the spindle 106 rotates in an oriented manner. Through the hexagonal shaft hole, it drives the variable eccentricity cylindrical cam 109 to rotate synchronously. The outer wheel surface of the variable eccentricity cylindrical cam 109 pushes the vibrating guide wheel 107 to move up and down reciprocatingly, thereby driving the vibrating screen frame 3 to overcome the elastic force of the re-vibration spring 110 and make high-frequency vibration perpendicular to the screen cylinder axis.

[0096] When it is necessary to adjust the amplitude of the vibrating screen frame 3, the central control unit 8 controls the linear transmission module 105 to drive the amplitude frame 108 to move along the axis of the spindle 106, which drives the variable eccentricity cylindrical cam 109 to move axially synchronously, so that the vibrating guide wheel 107 contacts the variable eccentricity cylindrical cam 109 at different eccentricity positions. Since the eccentricity of the variable eccentricity cylindrical cam 109 decreases linearly along the axial direction, the stepless and precise adjustment of the amplitude of the vibrating screen frame 3 can be achieved by adjusting the axial position of the variable eccentricity cylindrical cam 109.

[0097] This invention enables independent stepless adjustment of the amplitude of the vibrating screen frame 3 corresponding to each stage of the screen cylinder without stopping the equipment, and adapts to the adaptive control requirements of the central control unit 8 based on the feeding characteristics.

[0098] To match the optimal amplitude for wire rod mill scrap of different particle sizes, balancing sorting efficiency and accuracy;

[0099] The design of the variable eccentricity cylindrical cam 109, which is 9 times the width of the vibrating guide wheel 107, provides a sufficient stroke range for amplitude adjustment, while ensuring stable contact between the vibrating guide wheel 107 and the cam wheel surface, avoiding derailment and jamming during vibration. The setting of the re-vibration spring 110 ensures that the vibrating guide wheel 107 is always in close contact with the wheel surface of the variable eccentricity cylindrical cam 109, eliminating the idle stroke of the cam drive and improving the stability and accuracy of the vibration action.

[0100] The variable-range material leveling unit includes a variable-range rotary wheel 101 rotatably connected to the base frame 1. Both the drive shaft 905 and the variable-range rotary wheel 101 are equipped with first bevel gears. The two first bevel gears mesh orthogonally. Along the circumferential direction, three push protrusions 102 are arrayed on the variable-range rotary wheel 101. The eccentricity of the three push protrusions 102 is different from that of each other. A roller 103 is rotatably installed on the sorting frame 2. When the drive shaft 905 rotates, the outer circumferential surfaces of the three push protrusions 102 alternately roll and connect with the wheel surface of the roller 103. Two return springs 104 are installed between the sorting frame 2 and the base frame 1.

[0101] The drive shaft 905 drives the variable stroke wheel 101 to rotate synchronously through the orthogonally meshing first bevel gear. Three push protrusions 102 with different eccentricities on the variable stroke wheel 101 alternately roll and contact the roller 103, pushing the roller 103 in sequence to drive the sorting frame 2 to move forward along the screen cylinder axis in different strokes. When the push protrusions 102 disengage from the roller 103, the return spring 104 drives the sorting frame 2 to return quickly. This cycle realizes that the sorting frame 2 moves back and forth along the screen cylinder axis in three different reciprocating strokes, thereby driving the three-stage screen cylinder to perform axial variable stroke reciprocating motion synchronously.

[0102] The three-eccentricity variable-stroke reciprocating structure causes the waste in the screen cylinder to move axially in three different strokes, breaking the axial layering and accumulation of waste in the screen cylinder, and making the waste evenly distributed along the axial direction of the screen cylinder. This avoids the problems of uneven sorting load and idle screen sections caused by waste accumulation at the feed end and sparse waste at the discharge end. It makes full use of the entire screening section of the three-stage screen cylinder, improving the effective utilization rate and sorting efficiency of the screen cylinder.

[0103] Simultaneously, the variable-stroke axial reciprocating motion causes the waste material stuck in the screening hole to move axially, quickly detaching it from the screening hole, thus solving the problem of material blockage in the screening hole and further improving the continuity and stability of the sorting process.

[0104] A sorting method for an automatic scrap sorting mechanism for wire rod mills includes the following steps:

[0105] SS1 drives the feed shaft 601 to rotate in a specific direction, continuously and quantitatively feeding the wire rolling mill scrap into the inner screen cylinder 6 through the feed hopper 603;

[0106] SS2 collects image data of the feed waste, identifies the characteristics of the waste, and adjusts the vibration frequency of the three vibrating screen frames 3 synchronously and independently according to the identification results;

[0107] SS3 drives the inner screen cylinder 6 to perform asymmetrical reciprocating rotation, drives the outer screen cylinder 4 and the middle screen cylinder 5 to perform coaxial and opposite continuous rotation, and simultaneously drives the three vibrating screen frames 3 to drive the corresponding inner screen cylinder 6, middle screen cylinder 5 and outer screen cylinder 4 to perform high-frequency radial vibration in a direction perpendicular to their respective axes, and drives the sorting frame 2 to drive the inner screen cylinder 6, middle screen cylinder 5 and outer screen cylinder 4 to perform alternating reciprocating motion along their axial direction with three different reciprocating strokes;

[0108] SS4: Waste material undergoes the first stage of screening in the inner screen cylinder 6. Waste material with a particle size smaller than the screening holes of the inner screen cylinder 6 falls into the middle screen cylinder 5, where it undergoes the second stage of screening. Waste material with a particle size smaller than the screening holes of the middle screen cylinder 5 falls into the outer screen cylinder 4, where it undergoes the third stage of screening. Waste material with a particle size smaller than the screening holes of the outer screen cylinder 4 is discharged and collected. Waste material remaining in each stage of the screen cylinder is discharged and collected from the tail end.

[0109] The specific steps for using this invention are as follows:

[0110] The types of wire rod scrap targeted by this invention are mainly: large-diameter wire rod cut-off ends, short scrap, die flash, medium-diameter guide and roll wear metal fragments, small-diameter rolled metal chips, as well as ultrafine iron oxide powder and non-metallic impurities.

[0111] Before starting the equipment, the operator first completes the matching setting of the screening hole diameter of the inner screen cylinder 6, the middle screen cylinder 5, and the outer screen cylinder 4 according to the waste particle size classification and recycling standard of the daily production of the wire rolling mill. The operator also completes the preset of the sorting algorithm parameters in the central control unit 8 that are adapted to the characteristics of the wire rolling mill waste. At the same time, the operator completes the focusing calibration of the image acquisition module 10, the tension detection of each elastic synchronous belt, and the lubrication and debugging of each transmission component to ensure that the servo motor 9, the linear transmission module 105, the vibration drive unit, and the variable stroke uniform material unit can all respond normally to the control commands of the central control unit 8, and completes the full-process preparation work before starting the equipment.

[0112] In operation, the equipment starts and runs with a single servo motor 9 as the sole power source. The servo motor 9 drives the gear shaft 903 to rotate synchronously through the sliding fit between the regular hexagonal spline section on the drive shaft 905 and the sleeve hole of the gear shaft 903. On the one hand, it drives the synchronous shaft 901 to rotate in a directional manner through the transmission belt 904. The synchronous shaft 901 drives the feed shaft 601 and the first coupling 911 to rotate in a directional manner through the second elastic synchronous belt 913. The feed shaft 601 drives the spiral conveying blade 604 in the feed cylinder 602 to rotate at a uniform speed, and feeds the mixed waste continuously discharged during the wire rolling mill production process into the innermost inner screen cylinder 6 at a uniform speed through the feed hopper 603.

[0113] The image acquisition module 10 set in the opposing feed hopper 603 collects image data of the feed waste in real time, accurately identifies the core feeding characteristics such as particle size distribution, proportion of large-diameter block material, content of oil sludge agglomerates, and content of non-metallic impurities, and transmits the data to the central control unit 8 in real time. The central control unit 8 adjusts the vibration frequency of the three vibrating screen frames 3 synchronously based on the preset sorting algorithm, and independently adjusts the amplitude of the three vibrating screen frames 3 through the linear transmission module 105. For the large-diameter block waste in the inner screen cylinder 6, the vibration parameters are matched with large amplitude and low frequency, and for the small-diameter debris in the outer screen cylinder 4, the vibration parameters are matched with small amplitude and high frequency, so as to realize the closed-loop adaptive control of sorting parameters and adapt to the feeding fluctuation characteristics in the wire rolling mill production process.

[0114] On the other hand, the synchronous shaft 901 drives the second coupling 912 to rotate in reverse direction through the orthogonally meshing second bevel gear, and transmits the power synchronously to the spindle 106 of the three vibration drive units through the third elastic synchronous belt 914. The spindle 106 drives the variable eccentricity cylindrical cam 109 to rotate synchronously through the hexagonal shaft hole. With the rebound effect of the vibration guide wheel 107 and the re-vibration spring 110, the three vibrating screen frames 3 drive the corresponding screen cylinder to perform high-frequency radial vibration perpendicular to the screen cylinder axis, so that the wire rolling mill waste in each level of screen cylinder is in a continuous loose jumping state, breaking the waste adhesion state formed by the rolling emulsion, avoiding the clogging of the screening holes, and increasing the contact probability between the waste and the screening holes, thus enhancing the grading and sorting efficiency.

[0115] Meanwhile, the synchronous shaft 901, through the transmission cooperation of the steering bevel gear and the symmetrically arranged side bevel gear, drives the counter-rotating sleeve 915, which is rotated on the synchronous shaft 901, to form a coaxial and opposite rotational motion with the synchronous shaft 901. Then, through two sets of fourth elastic synchronous belts 917, the outer screen cylinder 4 and the middle screen cylinder 5 are driven to rotate continuously in the opposite direction on the same axis. This causes the small and medium-sized waste materials in the middle screen cylinder 5 and the outer screen cylinder 4 to generate a reverse circumferential relative motion, forming a reverse shearing force between adjacent screen cylinders. This effectively breaks up the waste material clumps formed by the rolling grease, allowing the metal fragments and impurities wrapped in the clumps to be fully separated, thereby improving the sorting accuracy and recycling purity of the small and medium-sized wire rolling mill waste.

[0116] Simultaneously, the drive shaft 905 drives two rotating wheels 906 with a 95° phase difference to rotate synchronously via the transmission belt 904. The sector-shaped gear transmission section 907 with an asymmetrical central angle on the rotating wheel 906 alternately meshes with the reciprocating gear 909. In conjunction with the rotary torsion spring 908 at the end of the reciprocating shaft 902, the inner screen cylinder 6 is driven by the first elastic synchronous belt 910 to perform an asymmetrical reciprocating rotation of 2.5 clockwise turns and 1.5 counterclockwise turns. This generates an alternating circumferential tumbling torque for the large-diameter irregular blocky waste material in the core processing of the inner screen cylinder 6, solving the problems of blocky waste material bridging and axial jamming of long strip-shaped cut heads in the 8° inclined cylinder. At the same time, it causes the waste material to form an irregular jumping tumbling motion, increasing the contact probability between the various surfaces of the large pieces of material and the screening holes, and solving the problem of insufficient sorting caused by the large pieces of material entraining small and medium-diameter waste material.

[0117] In addition, the drive shaft 905 drives the variable-range rotary wheel 101 to rotate synchronously through the orthogonally meshing first bevel gear. The three push protrusions 102 on the variable-range rotary wheel 101 with different eccentricities alternately roll and contact the rollers 103 on the sorting frame 2. With the help of the return spring 104 between the sorting frame 2 and the base frame 1, the sorting frame 2 drives the three-stage screen cylinder to make three different strokes of alternating reciprocating motion along the screen cylinder axis, so that the waste in the screen cylinder will generate variable-range axial movement, realize uniform material distribution in the entire screen section, avoid the problem of waste accumulation at the feed end and idle screen section at the discharge end, fully improve the effective utilization rate of the screen cylinder, and at the same time make the waste stuck in the screening hole axially move and quickly get off, further reduce the screening hole blockage rate, and ensure the continuity of the sorting process.

[0118] During this process, the mixed waste from the wire rolling mill completes the first-level classification and sorting in the inner screen cylinder 6. Waste with a particle size smaller than the screening holes of the inner screen cylinder 6 passes through the screening holes and falls into the middle screen cylinder 5 to complete the second-level classification and sorting. Waste with a particle size smaller than the screening holes of the middle screen cylinder 5 continues to pass through the screening holes and falls into the outer screen cylinder 4 to complete the third-level classification and sorting. Ultrafine iron oxide scale and non-metallic impurities with a particle size smaller than the screening holes of the outer screen cylinder 4 directly pass through the screening holes of the outer screen cylinder 4 and fall into the collection hopper 111 below for centralized discharge. Meanwhile, the high-value metal waste with the corresponding particle size remaining in each level of screen cylinder slides stably down the 8° inclined cylinder body to the tail end and enters the corresponding independent screen collection cylinder 7 to complete the classification and collection. Finally, continuous, high-precision, and adaptive classification and sorting of all types of waste from the wire rolling mill is achieved. The entire process is driven synchronously by a single power source, which realizes the feeding and conveying, the asymmetric reciprocating rotation of the inner screen cylinder 6, the coaxial and opposite rotation of the outer screen cylinder 4 and the middle screen cylinder 5, the high-frequency radial vibration of the screen cylinder, and the variable-range axial reciprocating uniform material distribution of the sorting frame 2.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic sorting mechanism for scrap from a wire rod mill, comprising a base frame (1), characterized in that, Also includes: The sorting frame (2) is slidably connected to the base frame (1). Three vibrating screen frames (3) are slidably connected to the sorting frame (2). The three vibrating screen frames (3) are respectively rotatably connected to the outer screen cylinder (4), the middle screen cylinder (5) and the inner screen cylinder (6). The inner screen cylinder (6), the middle screen cylinder (5) and the outer screen cylinder (4) are coaxially arranged and are arranged sequentially from the inside to the outside. Each of the three vibrating screen frames (3) is equipped with a vibration drive unit that drives the vibrating screen frame (3) to vibrate in a direction perpendicular to the axis of the outer screen cylinder (4). Three screening material collection cylinders (7) are fixedly installed on the base frame (1). The three screening material collection cylinders (7) are respectively connected to the tail ends of the outer screen cylinder (4), the middle screen cylinder (5) and the inner screen cylinder (6). The feed shaft (601) is coaxially mounted on the inner screen cylinder (6). The front end of the inner screen cylinder (6) is rotatably connected to the feed cylinder (602). The feed cylinder (602) is fixedly connected to the vibrating screen frame (3) corresponding to the inner screen cylinder (6). The top of the feed cylinder (602) is connected to the feed hopper (603). The feed shaft (601) is equipped with a spiral conveyor blade (604). The image acquisition module (10) is fixedly mounted on the sorting rack (2) and positioned opposite the feed hopper (603); The central control unit (8) is connected to the image acquisition module (10) and is configured to adjust the vibration frequency of the three vibrating screen frames (3) and adjust the vibration amplitude of the three vibrating screen frames (3) respectively based on the data feedback of the image acquisition module (10). The variable-stroke uniform material unit is configured such that the sorting frame (2) moves alternately along the axial direction of the outer screen cylinder (4) with three different reciprocating strokes; The transmission unit is configured as follows: Drive the inner screen cylinder (6) to reciprocate asymmetrically; Drive the outer sieve cylinder (4) and the middle sieve cylinder (5) to rotate in opposite directions on the same axis; Drive the feed shaft (601) to rotate in an oriented manner.

2. The automatic sorting mechanism for wire rod mill scrap according to claim 1, characterized in that, The outer sieve cylinder (4), the middle sieve cylinder (5) and the inner sieve cylinder (6) are all hollow cylindrical structures with open tail ends. Screening holes are arrayed on the outer circumferential surfaces of the outer sieve cylinder (4), the middle sieve cylinder (5) and the inner sieve cylinder (6), and the aperture of the screening holes on the outer sieve cylinder (4), the middle sieve cylinder (5) and the inner sieve cylinder (6) increases in size. The angle between the axis of the outer sieve cylinder (4) and the horizontal plane is 8°.

3. The automatic sorting mechanism for wire rod mill scrap according to claim 1, characterized in that, The transmission unit includes a servo motor (9) fixed on a base frame (1), a synchronous shaft (901), a reciprocating shaft (902), and two gear shafts (903) rotatably connected to the base frame (1). A transmission belt (904) is driven through the synchronous shaft (901), and both gear shafts (903) are driven through the transmission belt (904). One of the gear shafts (903) has a sleeve hole. A drive shaft (904) is installed at the output shaft end of the servo motor (9). 05), the drive shaft (905) is provided with a spline section that slides with the sleeve hole, and two gear shafts (903) are each equipped with a rotating wheel (906). Along the circumferential direction, the rotating wheel (906) is alternately provided with two sector-shaped gear transmission sections (907) and two smooth arc sections. The center angles corresponding to the effective meshing arc sections on the two sector-shaped gear transmission sections (907) are different from each other. A rotary torsion spring is provided at the rotational connection between the reciprocating shaft (902) and the base frame (1). 908), the reciprocating shaft (902) is equipped with a reciprocating gear (909) that meshes with the sector gear transmission section (907), the reciprocating shaft (902) and the inner screen cylinder (6) are connected by a first elastic synchronous belt (910), the inner screen cylinder (6) and the outer screen cylinder (4) are both connected to the synchronous shaft (901), the base frame (1) is rotatably connected with a first coupling (911) and a second coupling (912), the first coupling (911) and the second coupling (912) are connected by a first coupling (911) and a second coupling (912). The two couplings (912) are each equipped with a second bevel gear, and the two second bevel gears mesh orthogonally. The synchronous shaft (901) is connected to a second elastic synchronous belt (913). The feed shaft (601) and the first coupling (911) are both connected to the second elastic synchronous belt (913). The second coupling (912) is connected to a third elastic synchronous belt (914). The three vibration drive units are all connected to the third elastic synchronous belt (914).

4. The automatic sorting mechanism for wire rod mill scrap according to claim 3, characterized in that, A counter-rotating sleeve (915) is rotatably sleeved on the synchronous shaft (901), and a steering shaft (916) is rotatably connected to the base frame (1). Side bevel gears are installed on both the counter-rotating sleeve (915) and the synchronous shaft (901). A steering bevel gear is fixedly mounted on the steering shaft (916). Both side bevel gears are connected to the steering bevel gear in a transmission manner. The two side bevel gears are symmetrically arranged with the vertical plane containing the axis of the steering bevel gear as the axis. Two fourth elastic synchronous belts (917) are connected to the synchronous shaft (901) in a transmission manner. The two fourth elastic synchronous belts (917) are connected to the inner screen cylinder (6) and the outer screen cylinder (4) in a transmission manner, respectively.

5. The automatic sorting mechanism for wire rod mill scrap according to claim 4, characterized in that, The cross-sections of the spline segment and the sleeve hole are all regular hexagonal. The first elastic synchronous belt (910), the second elastic synchronous belt (913), the third elastic synchronous belt (914) and the fourth elastic synchronous belt (917) are all made of elastic rubber. The installation phase difference between the two rollers (906) and the base frame (1) is 95°. The two rollers (906) are respectively set on the upper and lower sides of the reciprocating gear (909).

6. The automatic sorting mechanism for wire rod mill scrap according to claim 5, characterized in that, The variable-range material leveling unit includes a variable-range rotary wheel (101) rotatably connected to the base frame (1). Both the drive shaft (905) and the variable-range rotary wheel (101) are equipped with first bevel gears. The two first bevel gears mesh orthogonally along the circumferential direction. Three push protrusions (102) are arrayed on the variable-range rotary wheel (101). The eccentricity of the three push protrusions (102) is different from each other. Rollers (103) are rotatably installed on the sorting frame (2). When the drive shaft (905) rotates, the outer circumferential surfaces of the three push protrusions (102) alternately roll and connect with the wheel surface of the roller (103). Two return springs (104) are installed between the sorting frame (2) and the base frame (1).

7. The automatic sorting mechanism for wire rod mill scrap according to claim 3, characterized in that, The vibration drive unit includes a linear transmission module (105) fixed on the base frame (1), a spindle (106) rotatably connected to the base frame (1), and a vibrating guide wheel (107) rotatably connected to the vibrating screen frame (3). An amplitude frame (108) is drivenly connected to the linear transmission module (105), and a variable eccentricity cylindrical cam (109) is rotatably mounted on the amplitude frame (108). The outer wheel surface of the variable eccentricity cylindrical cam (109) is in contact with the vibrating guide wheel (107). 7) The wheel surface is rolled together. Along the axial direction, the eccentricity of the variable eccentricity cylindrical cam (109) decreases linearly. The axial position of the variable eccentricity cylindrical cam (109) is provided with a shaft hole that is slidably connected to the spindle (106). The spindle (106) is connected to the third elastic synchronous belt (914) for transmission. Two re-vibration springs (110) are installed on the bottom surface of the vibrating screen frame (3). The bottom ends of the two re-vibration springs (110) are fixedly connected to the sorting frame (2).

8. The automatic sorting mechanism for wire rod mill scrap according to claim 7, characterized in that, The wheel surface width of the variable eccentricity cylindrical cam (109) is 7 to 10 times the wheel surface width of the vibrating guide wheel (107), and the cross-sections of the shaft hole and the spindle (106) are both regular hexagons.

9. The automatic sorting mechanism for wire rod mill scrap according to claim 1, characterized in that, The bottom of each of the three screening cylinders (7) is connected to a discharge pipe (701). A collection hopper (111) is fixed on the base frame (1) at the position directly below the outer screen cylinder (4). The bottom of the collection hopper (111) is connected to a screening discharge pipe (112).

10. A sorting method for an automatic sorting mechanism for wire rod mill scrap according to any one of claims 1-9, characterized in that, Includes the following steps: SS1 drives the feed shaft (601) to rotate in an orientation, and continuously and quantitatively feeds the wire rolling mill scrap into the inner screen cylinder (6) through the feed hopper (603). SS2, collect image data of the feed waste, identify the characteristics of the waste, and adjust the vibration frequency of the three vibrating screen frames (3) synchronously and independently according to the identification results; SS3 drives the inner screen cylinder (6) to perform asymmetrical reciprocating rotation, drives the outer screen cylinder (4) and the middle screen cylinder (5) to perform coaxial reverse continuous rotation, and simultaneously drives the three vibrating screen frames (3) to drive the corresponding inner screen cylinder (6), middle screen cylinder (5) and outer screen cylinder (4) to perform high-frequency radial vibration in a direction perpendicular to their respective axes, and drives the sorting frame (2) to drive the inner screen cylinder (6), middle screen cylinder (5) and outer screen cylinder (4) to perform alternating reciprocating motion along their axial direction with three different reciprocating strokes; SS4, the waste is screened in the inner screen cylinder (6) for the first stage. The waste with a particle size smaller than the screening hole of the inner screen cylinder (6) falls into the middle screen cylinder (5). The waste is screened in the middle screen cylinder (5) for the second stage. The waste with a particle size smaller than the screening hole of the middle screen cylinder (5) falls into the outer screen cylinder (4). The waste is screened in the outer screen cylinder (4) for the third stage. The waste with a particle size smaller than the screening hole of the outer screen cylinder (4) is discharged and collected. The waste remaining in each screen cylinder is discharged and collected from the tail end.

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