Stepped slag crushing and sorting device, sorting method and recycling application of stepped slag crushing and sorting device to roadbed filler

Abstract

The invention relates to the related technical field of slag crushing treatment, in particular to a stepped slag crushing and sorting device, a sorting method and recycling application of the stepped slag crushing and sorting device and the sorting method to roadbed filler. The stepped slag crushing and sorting device comprises a treatment box and a crusher arranged above the treatment box; the crusher crushes slag raw materials through the pressure between the two rollers, the crushed slag is guided into the treatment box, and the slag is subjected to separation treatment through a separation structure arranged in the treatment box; a first sieve plate, a second sieve plate and a third sieve plate are arranged in the treatment box, the first sieve plate, the second sieve plate and the third sieve plate are arranged in a step shape, and the sizes of sieve holes in the three sieve plates are gradually increased; the device is provided with the sieve plates of three different specifications, slag can be separated at a time after being crushed, the slag transferring work after each round of screening is omitted, and the construction efficiency can be remarkably improved.

Description

Technical Field

[0001] This invention relates to the technical field of slag crushing and treatment, specifically a stepped slag crushing and sorting device, sorting method, and its recycling application in roadbed filler. Background Technology

[0002] The recycling of slag not only has economic value but also has a positive impact on environmental protection. This process often involves crushing the slag raw material and then sorting it into multiple categories based on size to facilitate different recycling methods and maximize resource utilization.

[0003] Existing crushing and sorting devices typically require different screen sizes to screen and classify slag after crushing it. This means that the slag may need to be transferred between multiple screening devices to complete multiple screening processes and ultimately obtain slag of different sizes. Therefore, the crushing and sorting of slag needs to be carried out in multiple stages, which complicates the work process and makes it difficult to achieve the ideal construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a stepped slag crushing and sorting device, a sorting method, and its recycling application in roadbed filler, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A stepped slag crushing and sorting device includes a processing box and a crusher located above the processing box. The crusher crushes the slag raw material by the pressure between two rollers. The crushed slag is introduced into the processing box and sorted by a sorting structure located in the processing box. The sorting structure includes: The first screen plate, the second screen plate, and the third screen plate are movably disposed inside the processing box and are distributed in a stepped manner from high to low. The size of the screen holes on the three screen plates gradually increases. Each screen plate is connected to a first horizontal shaft, a second horizontal shaft, and a third horizontal shaft that are rotatably disposed inside the processing box through a set of transmission mechanisms. The first horizontal shaft and the third horizontal shaft are connected by a first transmission belt. Each screen plate is also provided with a set of discharge control mechanisms. A bidirectional moving mechanism is installed on the side of the processing box and connected to a reciprocating drive mechanism provided on the processing box. The reciprocating drive mechanism is used to drive the first screen plate, the second screen plate, and the third screen plate to reciprocate synchronously. The bidirectional moving mechanism is also connected to a deflection drive mechanism provided on the processing box. The deflection drive mechanism can cause the first screen plate and the third screen plate to deflect synchronously or the second screen plate to deflect independently.

[0006] As a further embodiment of the present invention: the bidirectional movable mechanism includes a lead screw rotatably mounted on the side of the processing box and a drive motor mounted on the side of the processing box with its output end connected to the lead screw. A threaded sleeve is fitted on the lead screw, the threaded sleeve is connected to the deflection drive mechanism, and the end of the lead screw away from the drive motor is connected to the reciprocating drive mechanism.

[0007] As a further embodiment of the present invention: the transmission mechanism includes three horizontal arms slidably disposed on the processing box and three sleeves respectively rotatably mounted on the three horizontal arms. The three sleeves are respectively fixed to the first sieve plate, the second sieve plate and the third sieve plate, and respectively slidably fitted with the first horizontal shaft, the second horizontal shaft and the third horizontal shaft. The outer walls of the first horizontal axis, the second horizontal axis, and the third horizontal axis each have two strip-shaped protrusions, and the inner wall of the sleeve is provided with strip-shaped grooves that are adapted to the strip-shaped protrusions.

[0008] As a further embodiment of the present invention: the reciprocating drive mechanism includes a disc rotatably mounted on the side of the processing box and a follower plate fixedly connected to the three cross arms. The rotation shaft of the disc is connected to the end of the lead screw away from the drive motor through a first bevel gear set. The disc is also connected to the follower plate through a push-pull rod. The first end of the push-pull rod is rotatably connected to the eccentric part of the disc, and the tail end is rotatably connected to the follower plate.

[0009] As a further embodiment of the present invention: the deflection drive mechanism includes a first driven shaft and a second driven shaft rotatably mounted on the processing box, the first driven shaft and the second driven shaft being parallel to each other, and both being connected to the threaded sleeve through a sliding fit assembly; The first driven shaft is connected to the second horizontal shaft via a second bevel gear set and a second transmission belt, and the second driven shaft is connected to the first horizontal shaft via a third bevel gear set.

[0010] As a further embodiment of the present invention: the sliding fit assembly includes two collars that are slidably sleeved on the first driven shaft and the second driven shaft respectively. The two collars are fixedly connected to the threaded sleeve through a connecting arm. The inner walls of the two collars are provided with protrusions. The outer walls of the first driven shaft and the second driven shaft are respectively provided with a first groove and a second groove that are adapted to the protrusions. The two protruding pillars extend into the first sliding groove and the second sliding groove respectively and are slidably connected to the first driven shaft and the second driven shaft respectively. The first sliding groove includes a first spiral groove and a first vertical groove connected from bottom to top, and the second sliding groove includes a second vertical groove and a second spiral groove connected from bottom to top.

[0011] As a further embodiment of the present invention: the discharge control mechanism includes two guide columns fixed to the bottom of the first screen plate and a sliding plate slidably connected to the two guide columns. The sliding plate is slidably attached to the end of the first screen plate away from the sleeve. The sliding plate is connected to two sets of elastic clearance components disposed at the bottom of the first screen plate.

[0012] As a further embodiment of the present invention: the elastic clearance component includes a guide shaft fixed to the bottom of the first sieve plate by a protrusion, a slider slidably disposed on the guide shaft, and a cylindrical spring sleeved on the outer periphery of the guide shaft. The two ends of the cylindrical spring are respectively connected to the slider and the protrusion, and the slider is connected to the slide plate by a connecting rod. The two ends of the connecting rod are respectively hinged to the slide plate and the slider. The slider is equipped with a pulley, which abuts against a limiting member fixed to the inner wall of the processing box. The limiting member is arc-shaped and has an inclined surface and an arc-shaped surface on the side facing the pulley.

[0013] A slag sorting method, employing the aforementioned stepped slag crushing and sorting device, includes the following steps; Step 1: The slag crushed by the crusher is conveyed into the first screen plate. The bidirectional moving mechanism drives the reciprocating drive mechanism to move. The reciprocating drive mechanism drives the first screen plate, the second screen plate and the third screen plate to maintain a reciprocating state in the processing box. Step 2: The bidirectional moving mechanism works in the forward direction. The deflection drive mechanism first drives the second screen plate to switch from the inclined state to the horizontal state, and then drives the first screen plate and the third screen plate to tilt synchronously to the inclined state. The first screen plate and the third screen plate perform the material pouring action synchronously. Step 3: The bidirectional moving mechanism reverses its operation, and the first and third screen plates return to a horizontal state. The crusher discharge port replenishes the slag to be sorted into the first screen plate. The deflection drive mechanism then drives the second screen plate to swing downward, dumping the slag from the first screen plate into the third screen plate.

[0014] The application of the stepped slag crushing and sorting device in the recycling of roadbed fill.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The processing box is equipped with a first screen plate, a second screen plate, and a third screen plate. The first screen plate, the second screen plate, and the third screen plate are arranged in a stepped manner, and the size of the screen holes on the three screen plates gradually increases. During operation, the first screen plate and the third screen plate rotate synchronously, while the second screen plate rotates independently. Therefore, the slag can be screened through the first screen plate, the second screen plate, and the third screen plate in sequence, so that slag of different particle sizes can be sorted and processed. Therefore, this application has three different specifications of screen plates, which enable the slag to be sorted in one go after being crushed, eliminating the slag transfer work after each round of screening and significantly improving construction efficiency. Secondly, during operation, whenever the screen plate wobbles, the mechanical interlocking mechanism enables the discharge control mechanism to automatically open the end of the wobbling screen plate, thus automating the discharge. Furthermore, the bidirectional moving mechanism drives the three screen plates to maintain a reciprocating motion within the processing box through the reciprocating drive mechanism. Therefore, when the screen plate is tilted, it ensures that the slag is fully discharged, preventing some slag from remaining in the screen holes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of a stepped slag crushing and sorting device.

[0017] Figure 2 This is a schematic diagram of another aspect of one embodiment of a stepped slag crushing and sorting device.

[0018] Figure 3 This is a structural schematic diagram from another angle of one embodiment of a stepped slag crushing and sorting device.

[0019] Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle.

[0020] Figure 5 for Figure 2 Enlarged view of the structure at point B.

[0021] Figure 6 This is a schematic diagram showing the distribution of the first screen plate, the second screen plate, and the third screen plate in one embodiment of a stepped slag crushing and sorting device.

[0022] Figure 7 for Figure 6 A structural diagram from another angle.

[0023] Figure 8 This is a schematic diagram of the transmission mechanism in one embodiment of a stepped slag crushing and sorting device.

[0024] Figure 9 This is a schematic diagram of the discharge control mechanism in one embodiment of a stepped slag crushing and sorting device.

[0025] Figure 10 for Figure 9 A structural diagram from another angle.

[0026] In the diagram: 1. Processing box; 101. Horizontal arm; 2. Drive motor; 3. Lead screw; 301. Threaded sleeve; 4. First bevel gear set; 5. Disc; 6. Push-pull rod; 7. Follower plate; 8. First screen plate; 9. Second screen plate; 10. Third screen plate; 11. First horizontal shaft; 12. Second horizontal shaft; 13. Third horizontal shaft; 14. First driven shaft; 1401. First spiral groove; 1402. First vertical groove; 15. Second driven shaft; 1501. Second vertical groove; 1502, second spiral groove; 16, first transmission belt; 17, second transmission belt; 18, connecting arm; 19, second bevel gear set; 20, third bevel gear set; 21, sleeve; 22, limiting component; 2201, inclined surface; 2202, arc-shaped surface; 23, protrusion; 24, guide shaft; 25, slider; 2501, pulley; 26, connecting rod; 27, sliding plate; 28, guide post; 29, inclined baffle; 30, collar. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0029] Please see Figures 1-10 In this embodiment of the invention, a stepped slag crushing and sorting device includes a processing box 1 and a crusher disposed above the processing box 1. The crusher crushes the slag raw material by the pressure between two rollers. The crushed slag is introduced into the processing box 1 and sorted by the sorting structure disposed in the processing box 1. The sorting structure includes: The first screen plate 8, the second screen plate 9, and the third screen plate 10 are movably disposed inside the processing box 1, and are distributed in a stepped manner from high to low. The size of the screen holes on the three screen plates gradually increases. Each screen plate is connected to a first horizontal shaft 11, a second horizontal shaft 12, and a third horizontal shaft 13, which are rotatably disposed inside the processing box 1, through a set of transmission mechanisms. The first horizontal shaft 11 and the third horizontal shaft 13 are connected by a first transmission belt 16. Each screen plate is also provided with a set of discharge control mechanisms. A bidirectional moving mechanism is installed on the side of the processing box 1 and connected to a reciprocating drive mechanism provided on the processing box 1. The reciprocating drive mechanism is used to drive the first sieve plate 8, the second sieve plate 9 and the third sieve plate 10 to reciprocate synchronously. The bidirectional moving mechanism is also connected to a deflection drive mechanism provided on the processing box 1. The deflection drive mechanism can cause the first sieve plate 8 and the third sieve plate 10 to deflect synchronously or the second sieve plate 9 to deflect independently.

[0030] Furthermore, the crusher described is an application of existing technology, which is not shown in the accompanying drawings. A hydraulic double-roll crusher can be selected, which is widely used in the field of slag crushing because it has the characteristics of high efficiency, stability and reliability. The hydraulic double-roll crusher achieves crushing through the pressure between two double rolls, which is more efficient than traditional crushers and can evenly distribute hard materials, thereby achieving better crushing effect. Secondly, the height difference between the first screen plate 8, the second screen plate 9, and the third screen plate 10 should be sufficient. The purpose is that, in specific implementation, the processing box 1 should also be equipped with multiple guide plates. The guide plates are inclined and are used to receive the slag screened from the first screen plate 8, the second screen plate 9, and the third screen plate 10, as well as the slag that is tilted down when the third screen plate 10 deflects. For this purpose, four discharge ports are formed on the processing box 1 for the classified discharge of slag of different sizes after sorting. Furthermore, since the first screen plate 8, the second screen plate 9, and the third screen plate 10 are constantly in a reciprocating motion (along the width direction of the processing box 1) during operation, in order to prevent some slag from spilling out when the first screen plate 8 deflects and failing to be smoothly poured into the second screen plate 9, and to prevent some slag from spilling out when the second screen plate 9 deflects and failing to be smoothly poured into the third screen plate 10, two inclined baffles 29 are provided on the upper part of the second screen plate 9 and the third screen plate 10. The inclined baffles 29 are inclined outward to block the material and ensure that the slag can smoothly and completely enter the next screen plate when it is poured.

[0031] During operation, the crushed slag can be discharged into the first screen plate 8 through the discharge port and the inclined feeding pipe. Whenever the first screen plate 8 finishes its reciprocating oscillating motion, the crusher discharges again to continue to replenish the slag to be sorted into the first screen plate 8. The threaded drive mechanism works to drive the reciprocating drive mechanism to drive the three screen plates to reciprocate so as to screen the slag. During the latter part of the forward operation of the bidirectional moving mechanism, the deflection drive mechanism will drive the first screen plate 8 and the third screen plate 10 to swing synchronously, while the second screen plate 9 remains horizontal. At the same time, the discharge control mechanism on the first screen plate 8 and the third screen plate 10 is triggered, causing the slag in the first screen plate 8 and the third screen plate 10 to be dumped. Specifically, the slag on the first screen plate 8 is dumped into the second screen plate 9, and the slag in the third screen plate 10 is dumped and collected. Conversely, during the latter part of the reverse movement of the bidirectional moving mechanism, the second screen plate 9 wobbles, and the slag in the second screen plate 9 is dumped into the third screen plate 10 for further screening. Therefore, this application provides a first screen plate 8, a second screen plate 9, and a third screen plate 10 arranged in a stepped manner within the processing box 1. The first screen plate 8 and the third screen plate 10 deflect synchronously, while the second screen plate 9 deflects independently. This allows the slag discharged from the crusher outlet to be screened sequentially through the first screen plate 8, the second screen plate 9, and the third screen plate 10, which have progressively larger screen hole sizes, thus achieving an effective sorting function.

[0032] Please refer to it again. Figure 2 and Figure 6 The bidirectional moving mechanism includes a lead screw 3 rotatably mounted on the side of the processing box 1 and a drive motor 2 mounted on the side of the processing box 1 with its output end connected to the lead screw 3. A threaded sleeve 301 is sleeved on the lead screw 3, and the threaded sleeve 301 is connected to the deflection drive mechanism. The end of the lead screw 3 away from the drive motor 2 is connected to the reciprocating drive mechanism.

[0033] Please refer to it again. Figure 7 and Figure 8 The transmission mechanism includes three horizontal arms 101 slidably mounted on the processing box 1 and three sleeves 21 rotatably mounted on the three horizontal arms 101. The three sleeves 21 are respectively fixed to the first sieve plate 8, the second sieve plate 9, and the third sieve plate 10, and respectively slidably fitted with the first horizontal shaft 11, the second horizontal shaft 12, and the third horizontal shaft 13. Two strip-shaped protrusions are formed on the outer walls of the first horizontal shaft 11, the second horizontal shaft 12, and the third horizontal shaft 13, and strip-shaped grooves adapted to the strip-shaped protrusions are provided on the inner walls of the sleeves 21.

[0034] Furthermore, during operation, the horizontal arm 101 connected to the reciprocating drive mechanism slides reciprocally along the width direction of the processing box 1. Correspondingly, the horizontal arm 101 drives the three sleeves 21 to slide reciprocally on the first horizontal shaft 11, the second horizontal shaft 12, and the third horizontal shaft 13, respectively. When the first horizontal shaft 11 and the third horizontal shaft 13 rotate synchronously via the first transmission belt 16, the sleeves 21 can rotate using the strip-shaped protrusion and the strip-shaped groove. Therefore, the first screen plate 8 and the third screen plate 10 can achieve synchronous swaying. Similarly, when the second horizontal shaft 12 rotates, it can cause the sleeves 21 located on it to drive the second screen plate 9 to deflect.

[0035] Please refer to it again. Figure 4 and Figure 6 The reciprocating drive mechanism includes a disc 5 rotatably mounted on the side of the processing box 1 and a follower plate 7 fixedly connected to the three cross arms 101. The rotation shaft of the disc 5 is connected to the end of the lead screw 3 away from the drive motor 2 through the first bevel gear set 4. The disc 5 is also connected to the follower plate 7 through a push-pull rod 6. The first end of the push-pull rod 6 is rotatably connected to the eccentric part of the disc 5, and the tail end is rotatably connected to the follower plate 7.

[0036] In detail, the first bevel gear set 4 includes a first bevel gear fixedly installed on the end of the lead screw 3 away from the drive motor 2 and a second bevel gear fixedly installed coaxially with the disk 5, and the second bevel gear meshes with the first bevel gear; When the drive motor 2 drives the lead screw 3 to rotate in the forward or reverse direction, it drives the disc 5 to rotate through the first bevel gear set 4. Then, the disc 5 can drive the follower plate 7 through the push-pull rod 6 to move the three horizontal arms 101 back and forth along the width direction of the processing box 1. Correspondingly, the three horizontal arms 101 drive the first screen plate 8, the second screen plate 9 and the third screen plate 10 to move back and forth through the three sleeves 21 respectively, realizing the effective screening function of slag.

[0037] Please refer to it again. Figure 3 and Figure 5 The deflection drive mechanism includes a first driven shaft 14 and a second driven shaft 15 rotatably mounted on the processing box 1. The first driven shaft 14 and the second driven shaft 15 are parallel and are connected to the threaded sleeve 301 via a sliding fit assembly. The first driven shaft 14 is connected to the second horizontal shaft 12 via a second bevel gear set 19 and a second transmission belt 17, and the second driven shaft 15 is connected to the first horizontal shaft 11 via a third bevel gear set 20.

[0038] Specifically, a connecting shaft (not labeled in the figure) is rotatably mounted on the processing box 1, the second transmission belt 17 is used to connect the second horizontal shaft 12 and the connecting shaft, and the second bevel gear set 19 includes a third bevel gear fixed to the upper end of the first driven shaft 14 and a fourth bevel gear fixed to the connecting shaft, the fourth bevel gear meshing with the third bevel gear; Secondly, the third bevel gear set 20 includes a fifth bevel gear fixed to the upper end of the second driven shaft 15 and a sixth bevel gear fixed to the first horizontal shaft 11, wherein the sixth bevel gear meshes with the fifth bevel gear.

[0039] The sliding fit assembly includes two collars 30 that are slidably sleeved on the first driven shaft 14 and the second driven shaft 15, respectively. The two collars 30 are fixedly connected to the threaded sleeve 301 via a connecting arm 18. Each collar 30 has a protruding post on its inner wall. The outer walls of the first driven shaft 14 and the second driven shaft 15 are respectively provided with a first sliding groove and a second sliding groove adapted to the protruding post. The two protruding posts extend into the first sliding groove and the second sliding groove, respectively, and are slidably connected to the first driven shaft 14 and the second driven shaft 15. The first sliding groove includes a first helical groove 1401 and a first vertical groove 1402 connected from bottom to top. The second sliding groove includes a second vertical groove 1501 and a second helical groove 1502 connected from bottom to top.

[0040] When the drive motor 2 drives the lead screw 3 to rotate in the forward or reverse direction, the threaded sleeve 301 will drive the two collars 30 to slide upward or downward along the axial direction of the first driven shaft 14 and the second driven shaft 15 respectively through the connecting arm 18. Specifically, during the upward movement of the collar 30, the first driven shaft 14 rotates first due to the sliding engagement of the protrusion on the inner wall of the collar 30 and the first spiral groove 1401. This rotation drives the second horizontal shaft 12 to rotate via the second bevel gear set 19 and the second transmission belt 17. The second screen plate 9 switches from a downward inclined state to a horizontal state. After the protrusion enters the first vertical groove 1402, the second screen plate 9 remains horizontal, facilitating the subsequent collection of slag poured from the first screen plate 8. Then, during the later part of the upward stroke of the collar 30, the second driven shaft 15 rotates due to the sliding engagement of the protrusion and the second spiral groove 1502. This rotation drives the first horizontal shaft 11 to rotate via the third bevel gear set 20. The first horizontal shaft 11 and the third horizontal shaft 13 rotate synchronously via the first transmission belt 16. That is, the first screen plate 8 and the third screen plate 10 swing downward synchronously to pour out the slag on each of them. During the downward movement of the collar 30, the protruding post first causes the first screen plate 8 and the third screen plate 10 to return to a horizontal state through the second spiral groove 1502. When the collar 30 enters the later part of the downward stroke, under the cooperation of the protruding post and the first spiral groove 1401, the first driven shaft 14 rotates, and the second screen plate 9 swings downward, dumping the slag on it into the third screen plate 10 for further sorting.

[0041] It should be noted that since the first screen plate 8, the second screen plate 9 and the third screen plate 10 are each provided with a set of discharge control mechanisms, and the three sets of discharge control mechanisms have the same structure, the following description focuses on the discharge control mechanism on the first screen plate 8. Please refer to it again. Figure 9 and Figure 10 The discharge control mechanism includes two guide posts 28 fixed to the bottom of the first screen plate 8 and a slide plate 27 slidably connected to the two guide posts 28. The slide plate 27 is slidably attached to the end of the first screen plate 8 away from the sleeve 21. The slide plate 27 is connected to two sets of elastic clearance components disposed at the bottom of the first screen plate 8. The elastic clearance component includes a guide shaft 24 fixed to the bottom of the first screen plate 8 by a protrusion 23, a slider 25 slidably disposed on the guide shaft 24, and a cylindrical spring sleeved on the outer periphery of the guide shaft 24. The two ends of the cylindrical spring are respectively connected to the slider 25 and the protrusion 23, and the slider 25 is connected to the slide plate 27 by a connecting rod 26. The two ends of the connecting rod 26 are respectively hinged to the slide plate 27 and the slider 25. The slider 25 is equipped with a pulley 2501, which abuts against a limiting member 22 fixed to the inner wall of the processing box 1. The limiting member 22 is arc-shaped and has an inclined surface 2201 and an arc-shaped surface 2202 on the side facing the pulley 2501.

[0042] It should be emphasized that the limiting member 22 is concentric with the rotation center of the first screen plate 8. When the first screen plate 8 swings downward, the pulley 2501 rolls along the inclined surface 2201, which causes the slider 25 to give way on the guide shaft 24. The slider 25 slides toward the protrusion 23, the cylindrical spring is compressed, and the slider 25 pushes the slide plate 27 to slide on the guide post 28 through the connecting rod 26. Finally, the pulley 2501 rolls onto the arc surface 2202, and the slide plate 27 opens the end of the first screen plate 8 away from the rotation center. Therefore, the slag in the first screen plate 8 can be dumped. During the upward swing and reset process of the first screen plate 8, after the pulley 2501 separates from the arc surface 2202, the cylindrical spring rebounds, causing the slider 25 to pull the slide plate 27 to slide and reset through the connecting rod 26, and re-seal the end of the first screen plate 8 away from the rotation center.

[0043] It should be added that, during operation, the first sieve plate 8 will reciprocate along the width direction of the processing box 1, and the limiting member 22 should have sufficient width to prevent the pulley 2501 from disengaging from the limiting member 22.

[0044] A slag sorting method, employing the aforementioned stepped slag crushing and sorting device, includes the following steps; Step 1: The slag crushed by the crusher is transported into the first screen plate 8. The bidirectional moving mechanism drives the reciprocating drive mechanism to move. The reciprocating drive mechanism drives the first screen plate 8, the second screen plate 9 and the third screen plate 10 to maintain a reciprocating state in the processing box 1. Step 2: The bidirectional moving mechanism works in the forward direction. The deflection drive mechanism first drives the second screen plate 9 to switch from the inclined state to the horizontal state, and then drives the first screen plate 8 and the third screen plate 10 to tilt synchronously to the inclined state. The first screen plate 8 and the third screen plate 10 simultaneously perform the material pouring action. Step 3: The bidirectional moving mechanism works in reverse, and the first screen plate 8 and the third screen plate 10 return to a horizontal state. The crusher discharge port replenishes the slag to be sorted into the first screen plate 8. The deflection drive mechanism then drives the second screen plate 9 to swing downward, dumping the slag from the first screen plate 8 into the third screen plate 10.

[0045] The application of the stepped slag crushing and sorting device in the recycling of roadbed fill.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepped slag crushing and sorting device, characterized in that, Includes a processing box (1) and a crusher located above the processing box (1). The crusher crushes the slag raw material by the pressure between two rollers. The crushed slag is introduced into the processing box (1) and sorted by the sorting structure located in the processing box (1). The sorting structure includes: The first screen plate (8), the second screen plate (9), and the third screen plate (10) are movably arranged in the processing box (1), and are distributed in a stepped manner from high to low. The size of the screen holes on the three screen plates gradually increases, and each screen plate is connected to a first horizontal shaft (11), a second horizontal shaft (12), and a third horizontal shaft (13) that are rotatably arranged in the processing box (1) through a set of transmission mechanisms. The first horizontal shaft (11) and the third horizontal shaft (13) are connected through a first transmission belt (16). Each screen plate is also provided with a set of discharge control mechanisms. A bidirectional moving mechanism is installed on the side of the processing box (1) and connected to a reciprocating drive mechanism provided on the processing box (1). The reciprocating drive mechanism is used to drive the first sieve plate (8), the second sieve plate (9) and the third sieve plate (10) to reciprocate synchronously. The bidirectional moving mechanism is also connected to a deflection drive mechanism provided on the processing box (1). The deflection drive mechanism can cause the first sieve plate (8) and the third sieve plate (10) to deflect synchronously or the second sieve plate (9) to deflect independently.

2. The stepped slag crushing and sorting device according to claim 1, characterized in that, The bidirectional moving mechanism includes a lead screw (3) rotatably mounted on the side of the processing box (1) and a drive motor (2) mounted on the side of the processing box (1) and connected to the lead screw (3) at its output end. A threaded sleeve (301) is fitted on the lead screw (3), and the threaded sleeve (301) is connected to the deflection drive mechanism. The end of the lead screw (3) away from the drive motor (2) is connected to the reciprocating drive mechanism.

3. The stepped slag crushing and sorting device according to claim 2, characterized in that, The transmission mechanism includes three horizontal arms (101) slidably disposed on the processing box (1) and three sleeves (21) rotatably mounted on the three horizontal arms (101). The three sleeves (21) are respectively fixed to the first sieve plate (8), the second sieve plate (9) and the third sieve plate (10), and respectively slidably fitted with the first horizontal shaft (11), the second horizontal shaft (12) and the third horizontal shaft (13). Two strip-shaped protrusions are formed on the outer walls of the first horizontal axis (11), the second horizontal axis (12), and the third horizontal axis (13), and a strip-shaped groove adapted to the strip-shaped protrusions is provided on the inner wall of the sleeve (21).

4. The stepped slag crushing and sorting device according to claim 3, characterized in that, The reciprocating drive mechanism includes a disc (5) rotatably mounted on the side of the processing box (1) and a follower plate (7) fixedly connected to the three cross arms (101). The rotation shaft of the disc (5) is connected to the end of the lead screw (3) away from the drive motor (2) through the first bevel gear set (4). The disc (5) is also connected to the follower plate (7) through a push-pull rod (6). The first end of the push-pull rod (6) is rotatably connected to the eccentric part of the disc (5), and the tail end is rotatably connected to the follower plate (7).

5. A stepped slag crushing and sorting device according to claim 2, characterized in that, The deflection drive mechanism includes a first driven shaft (14) and a second driven shaft (15) rotatably mounted on the processing box (1). The first driven shaft (14) and the second driven shaft (15) are parallel to each other and are connected to the threaded sleeve (301) through a sliding fit assembly. The first driven shaft (14) is connected to the second horizontal shaft (12) via the second bevel gear set (19) and the second transmission belt (17), and the second driven shaft (15) is connected to the first horizontal shaft (11) via the third bevel gear set (20).

6. A stepped slag crushing and sorting device according to claim 5, characterized in that, The sliding fit assembly includes two collars (30) that are slidably sleeved on the first driven shaft (14) and the second driven shaft (15) respectively. The two collars (30) are fixedly connected to the threaded sleeve (301) through a connecting arm (18). The inner walls of the two collars (30) are provided with protrusions. The outer walls of the first driven shaft (14) and the second driven shaft (15) are respectively provided with a first groove and a second groove that are adapted to the protrusions. The two protruding pillars extend into the first slide groove and the second slide groove respectively and are slidably connected to the first driven shaft (14) and the second driven shaft (15) respectively. The first slide groove includes a first spiral groove (1401) and a first vertical groove (1402) connected from bottom to top. The second slide groove includes a second vertical groove (1501) and a second spiral groove (1502) connected from bottom to top.

7. A stepped slag crushing and sorting device according to claim 3, characterized in that, The discharge control mechanism includes two guide posts (28) fixed to the bottom of the first screen plate (8) and a slide plate (27) slidably connected to the two guide posts (28). The slide plate (27) is slidably attached to the end of the first screen plate (8) away from the sleeve (21). The slide plate (27) is connected to two sets of elastic clearance components located at the bottom of the first screen plate (8).

8. A stepped slag crushing and sorting device according to claim 7, characterized in that, The elastic clearance assembly includes a guide shaft (24) fixed to the bottom of the first sieve plate (8) by a protrusion (23), a slider (25) slidably disposed on the guide shaft (24), and a cylindrical spring sleeved on the outer periphery of the guide shaft (24). The two ends of the cylindrical spring are respectively connected to the slider (25) and the protrusion (23), and the slider (25) is connected to the slide plate (27) by a connecting rod (26). The two ends of the connecting rod (26) are respectively hinged to the slide plate (27) and the slider (25). The slider (25) is equipped with a pulley (2501), which abuts against a limiting member (22) fixed on the inner wall of the processing box (1). The limiting member (22) is arc-shaped and has an inclined surface (2201) and an arc-shaped surface (2202) on the side facing the pulley (2501).

9. A slag sorting method, employing the stepped slag crushing and sorting device as described in claim 1, characterized in that, Includes the following steps: Step 1: The slag that has been crushed by the crusher is transported into the first screen plate (8). The bidirectional moving mechanism drives the reciprocating drive mechanism to move. The reciprocating drive mechanism drives the first screen plate (8), the second screen plate (9) and the third screen plate (10) to maintain a reciprocating state in the processing box (1). Step 2: The bidirectional moving mechanism works in the forward direction. The deflection drive mechanism first drives the second screen plate (9) to switch from the inclined state to the horizontal state, and then drives the first screen plate (8) and the third screen plate (10) to tilt synchronously to the inclined state. The first screen plate (8) and the third screen plate (10) simultaneously perform the material pouring action. Step 3: The bidirectional moving mechanism works in reverse, the first screen plate (8) and the third screen plate (10) return to the horizontal state, the crusher discharge port replenishes the slag to be sorted into the first screen plate (8), and the deflection drive mechanism drives the second screen plate (9) to swing downward, dumping the slag from the first screen plate (8) into the third screen plate (10).

10. The application of a stepped slag crushing and sorting device as described in any one of claims 1-8 in the recycling of roadbed fill.

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