Steel slag pretreatment equipment for roads

Abstract

The invention relates to the technical field of steel slag pretreatment, and particularly discloses road steel slag pretreatment equipment which comprises a crushing box, the lower end of the crushing box is fixedly connected with a screening box, and the lower end of the screening box is fixedly connected with a base. And once the steel slag does not pass through the screening net, a second motor drives a disc to rotate, the disc drives a pulling rod to move, the pulling rod drives a connecting block to move, the connecting block is connected with the screening net, and under the action of a supporting reset assembly, the steel slag enters the next treatment unit. And the steel slag on the screening net moves upwards to enter the crushing roller again to be crushed, so that the steel slag is relatively uniformly crushed, repeated steel slag processing is not needed, the processing difficulty is reduced, the processing time is shortened, the steel slag pretreatment efficiency and the smoothness of the whole working process are improved, and the steel slag recovery work is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of steel slag pretreatment, and in particular to a steel slag pretreatment device for roads. Background Art

[0002] Steel slag is waste generated during steel processing or construction, mainly including waste and fragments generated during steel bar cutting, welding, grinding, etc. These steel slags usually contain residual parts of steel, oxides, impurities and other components, and have a certain hardness and density. These steel slag wastes may have a certain impact on the construction site environment and the health of workers, so they need to be properly handled. Pretreatment of steel slag can effectively process and recycle these wastes, improve resource utilization, reduce environmental pollution, and meet environmental protection requirements. Therefore, large steel slag needs to be crushed.

[0003] For example, a Chinese patent with publication number CN211937179U discloses a steel slag pretreatment device for roads, including a feed box and a resetter, wherein the resetter is installed on the upper outer wall of the feed box, a door panel rotating groove is provided on the upper outer wall of the feed box on the rear side of the feed box, a blocking plate is connected to the front end inner wall of the door panel rotating groove, and a closed door panel is provided inside the feed box on the rear side of the blocking plate.

[0004] Although the above solves the problem that the closed door panel can completely block the front end feed port of the feed box, and the entire process does not require manual operation, which reduces the workload of the staff and ensures personal safety, there are still some problems that need to be improved. The steel slag metal enters the pretreatment device for crushing and breaking, and there is still some steel slag metal that is not fully crushed and broken and is directly discharged from the discharge hole, resulting in uneven crushing. In this case, in order to improve the recycling quality, secondary processing is usually required, which not only wastes time but also is inefficient. In addition, the current pretreatment process does not reasonably handle the magnetic and non-magnetic steel slag, which is not conducive to recycling work and affects recycling efficiency and resource utilization.

[0005] Therefore, we propose a road steel slag pretreatment equipment to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a road steel slag pretreatment device to solve the problems in the background technology mentioned above.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: to provide a road steel slag pretreatment equipment, which structure includes a crushing box, a screening box is fixedly connected to the lower end of the crushing box, and a base is fixedly connected to the lower end of the screening box; a crushing roller is rotatably connected to one side of the crushing box, a crushing roller is rotatably connected to the lower side of the crushing roller in the crushing box, and a transmission mechanism is fixedly connected to one side of the crushing box; a screening net is movably connected to the lower side of the crushing roller in the crushing box, and pulling components are installed on both sides of the lower end of the screening net; a supporting reset component is installed on the lower side of the pulling component of the screening net; a first guide plate is fixedly connected to one side of the screening box, and a magnetic roller is rotatably connected to the lower side of the first guide plate in the screening box; a scraper roller is rotatably connected to one side of the magnetic roller in the screening box; a second guide plate is fixedly connected to the lower side of the magnetic roller in the screening box, a second drive component is fixedly connected to one side of the outer wall of the screening box, and a third drive component is fixedly connected to the other side of the outer wall of the screening box; both sides of the screening box are provided with discharge holes, and the discharge holes are located on one side of the scraper roller.

[0008] The transmission mechanism includes a first gear, a second gear, a third gear, a fourth gear, and a first driving assembly, one side of the first gear is fixedly connected to one side of one of the crushing rollers, one side of the second gear is fixedly connected to one side of the other crushing roller, the third gear is fixedly connected to one side of one of the crushing rollers, the fourth gear is fixedly connected to one side of the other crushing roller, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the first driving assembly is fixedly connected to the crushing box on one side of the first gear.

[0009] The first driving assembly includes a first sprocket, the first sprocket is fixedly connected to one side of the first gear, the second sprocket is fixedly connected to one side of the third gear, the first sprocket is drivingly connected to the second sprocket via a first chain, a first motor is fixedly connected to one side of the outer wall of the crushing box, and the output end of the first motor is fixedly connected to one side of the third sprocket.

[0010] The pulling assembly includes a second motor, which is fixedly connected to a side of the crushing box away from the first motor, and a disc is fixedly connected to the output end of the second motor, and the disc is rotatably connected to the inside of the crushing box, and a pulling rod is hinged on one side of the disc, and a connecting block is fixedly connected to the upper end of the pulling rod, and the top of the connecting block is fixedly connected to the lower end of the screening net.

[0011] Both sides of the connecting block are fixedly connected with side blocks, the lower ends of the side blocks are fixedly connected with guide rods, both sides of the disc in the crushing box are fixedly connected with guide blocks, and one side of the guide rod is slidably connected to the guide block.

[0012] The support and reset assembly includes a fixed plate, which is fixedly connected in the crushing box and located at the lower side of the screening net, and the fixed plate is away from the guide block. A spring is fixedly connected between the fixed plate and the screening net. A sliding rod is slidably connected to one side of the fixed plate, and the top end of the sliding rod is fixedly connected to the lower end of the screening net.

[0013] Both sides of the lower end of the screening net are fixedly connected with shielding plates, and the shielding plates cover the fixed plates and the guide blocks.

[0014] The second driving assembly includes a third motor, the third motor is fixedly connected to one side of the screening box, the output end of the third motor is fixedly connected to a third sprocket, a side of the screening box away from the third sprocket is rotatably connected to a fourth sprocket, one side of the third sprocket is fixedly connected to one side of one of the scraper rollers, one side of the fourth sprocket is fixedly connected to one side of another scraper roller, and the third sprocket is drivingly connected to the fourth sprocket via a second chain.

[0015] The third driving assembly includes a fourth motor, the fourth motor is fixedly connected to the other side of the screening box, the output end of the fourth motor is fixedly connected to a fifth sprocket, a side of the screening box away from the fifth sprocket is rotatably connected to a sixth sprocket, one side of the fifth sprocket is fixedly connected to one side of one of the magnetic rollers, one side of the sixth sprocket is fixedly connected to one side of another of the magnetic rollers, and the fifth sprocket is transmission-connected to the sixth sprocket via a third chain.

[0016] The beneficial effects of the present invention are as follows: by installing the first gear, the second gear, the third gear, the fourth gear and the first driving assembly on the crushing box, the crushing roller and the pulverizing roller on the crushing box can work simultaneously; the crushing roller is installed at the entrance of the crushing box, which can crush and bend the large pieces of steel slag entering, so that when it passes through the pulverizing roller under the crushing roller, the steel slag can be better crushed under the action of the pulverizing roller, thereby improving the pretreatment effect of the steel slag and making the subsequent treatment process smoother and more efficient; by installing a screening net in the crushing box, the steel slag after fine crushing reaches the composite standard and passes through the screening net to enter the next processing unit; once the steel slag fails to pass through the screening net, the disc is driven to rotate by the second motor, so that the disc drives the pulling rod to move, and the pulling rod drives the connecting block to move, and the connecting block is connected to the screening net, and under the action of the supporting reset assembly, the screening net is moved up and down, so that the steel slag on the screening net moves upward The slag is then crushed into the crushing roller again, so that the slag is crushed relatively evenly, and there is no need to repeatedly process the slag, which reduces the processing difficulty and time, improves the slag pretreatment efficiency and the smoothness of the overall work process, and is conducive to the recovery of slag. In the present invention, after the qualified slag falls from the screening net, it enters the screening box through the first guide plate, and the third driving component is used to drive the two magnetic rollers to rotate, so as to adsorb the magnetic slag passing through the magnetic roller, and the non-magnetic slag continues to fall downward, and the magnetic slag rotates on the magnetic roller, and the second driving component is used to drive the scraper roller to rotate, and the magnetic slag on the magnetic roller is scraped off by the rotation of the scraper roller, and is discharged to the discharge hole through the second guide plate, so that the magnetic and non-magnetic slag can be separated, and the difficulty of waste treatment caused by mixed magnetic and non-magnetic materials is effectively reduced, so that the recycling process is simpler and more efficient, the recycling efficiency is improved, and the resource reuse is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the transmission mechanism structure in the present invention; Figure 3 It is a schematic diagram of the structure of the second driving component in the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at point A; Figure 6 This is a schematic diagram of the cross-sectional structure of the crushing box in the present invention; Figure 7 For the present invention Figure 4 A schematic diagram of the enlarged structure at B; Figure 8 For the present invention Figure 4 Enlarged structural diagram at C.

[0018] In the figure: 1, crushing box; 2, screening box; 3, base; 4, crushing roller; 5, crushing roller; 6, transmission mechanism; 61, first gear; 62, second gear; 63, third gear; 64, fourth gear; 65, first driving assembly; 651, first sprocket; 652, first chain; 653, second sprocket; 654, first motor; 7, screening net; 8, pulling assembly; 81, second motor; 82, disc; 83, pulling rod; 84, connecting block; 85, side block; 86, guide rod ;87. Guide block;9. Support reset assembly;91. Spring;92. Fixed plate;93. Slide rod;10. Shielding plate;11. First guide plate;12. Second guide plate;13. Discharge hole;14. Magnetic roller;15. Scraper roller;16. Second drive assembly;161. Third motor;162. Third sprocket;163. Second chain;164. Fourth sprocket;17. Third drive assembly;171. Fourth motor;172. Fifth sprocket;173. Third chain;174. Sixth sprocket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-8As shown, in an embodiment of the present invention, a road slag pretreatment device is provided, including a crushing box 1, a screening box 2 is fixedly connected to the lower end of the crushing box 1, a base 3 is fixedly connected to the lower end of the screening box 2, a crushing roller 4 is rotatably connected to one side of the interior of the crushing box 1, a crushing roller 5 is rotatably connected to the lower side of the crushing roller in the crushing box 1, a transmission mechanism 6 is fixedly connected to one side of the crushing box 1, a screening net 7 is movably connected to the lower side of the crushing roller 5 in the crushing box 1, a pulling assembly 8 is installed on both sides of the lower end of the screening net 7, a supporting reset assembly 9 is installed on one side of the pulling assembly 8 on the lower side of the screening net 7, a first guide plate 11 is fixedly connected to one side of the interior of the screening box 2, and a rotating connection mechanism 6 is fixedly connected to the lower side of the first guide plate 11 in the screening box 2. A magnetic roller 14 is connected, a scraper roller 15 is rotatably connected to one side of the magnetic roller 14 in the screening box 2, a second guide plate 12 is fixedly connected to the lower side of the magnetic roller 14 in the screening box 2, a second drive assembly 16 is fixedly connected to the outer wall of one side of the screening box 2, and a third drive assembly 17 is fixedly connected to the outer wall of the other side of the screening box 2. Discharge holes 13 are opened on both sides of the screening box 2, and the discharge holes 13 are located on one side of the scraper roller 15. Through the above settings, the need for secondary processing due to uneven crushing of steel slag is effectively avoided, the production efficiency and recycling efficiency are improved, and the utilization efficiency of resources is improved by reasonably pre-treating the steel slag containing magnetic and non-magnetic materials, without the need for further classification and processing, and the use cost is reduced.

[0021] like Figure 2 As shown, the transmission mechanism 6 includes a first gear 61, a second gear 62, a third gear 63, a fourth gear 64, and a first driving assembly 65. One side of the first gear 61 is fixedly connected to one side of a crushing roller 4, one side of the second gear 62 is fixedly connected to one side of the other crushing roller 4, the third gear 63 is fixedly connected to one side of a pulverizing roller 5, and the fourth gear 64 is fixedly connected to one side of the other pulverizing roller 5. The first gear 61 is meshedly connected with the second gear 62, and the third gear 63 is meshedly connected with the fourth gear 64. The first driving assembly 65 is fixedly connected to the crushing box 1 and is located on one side of the first gear 61. By fixing the first gear 61 and the second gear 62 to the two crushing rollers 4, the first gear 61 and the second gear 62 are in opposite directions, so that the two crushing rollers 4 can crush the incoming steel slag. The third gear 63 and the fourth gear 64 are fixed to the two pulverizing rollers 5, and the third gear 63 and the fourth gear 64 are in opposite directions, so that the two pulverizing rollers 5 can crush the crushed steel slag.

[0022] like Figure 2As shown, the first driving assembly 65 includes a first sprocket 651, the first sprocket 651 is fixedly connected to one side of the first gear 61, the second sprocket 653 is fixedly connected to one side of the third gear 63, the first sprocket 651 is transmission-connected to the second sprocket 653 through a first chain 652, a first motor 654 is fixedly connected to one side of the outer wall of the crushing box 1, and the output end of the first motor 654 is fixedly connected to one side of the third sprocket 162; by setting the first driving assembly 65, the first motor 654 is used to drive the first sprocket 651 to rotate, and the first sprocket 651 rotates the second sprocket 653 through the first chain 652, so that the first gear 61 and the third gear 63 can be rotated, and the second gear 62 and the fourth gear 64 can be driven to rotate respectively.

[0023] like Figure 7 As shown, the pulling assembly 8 includes a second motor 81, which is fixedly connected to a side of the crushing box 1 away from the first motor 654, and a disc 82 is fixedly connected to the output end of the second motor 81, and the disc 82 is rotatably connected to the inside of the crushing box 1, and a pulling rod 83 is hinged on one side of the disc 82, and a connecting block 84 is fixedly connected to the upper end of the pulling rod 83, and the top of the connecting block 84 is fixedly connected to the lower end of the screening net 7, and side blocks 85 are fixedly connected to both sides of the connecting block 84, and the lower end of the side block 85 is fixedly connected to a guide rod 86, and guide blocks 87 are fixedly connected to both sides of the disc 82 in the crushing box 1, and one side of the guide rod 86 is connected to the guide Block 87 is slidably connected; by setting up the pulling component 8, the second motor 81 is used to drive the disc 82 to rotate, so that the disc 82 drives the pulling rod 83 to move, and the pulling rod 83 drives the connecting block 84 to move, and the connecting block 84 drives the screening net 7 to move, so that the steel slag above can move upward and enter the crushing roller 5 for further crushing, by fixing the side blocks 85 on both sides of the connecting block 84, fixing the guide rod 86 under the side block 85, and fixing the guide blocks 87 on both sides of the disc 82, the guide blocks 87 are kept at a certain distance from the disc 82 to prevent the pulling rod 83 from contacting the guide blocks 87, and the guide rod 86 slides in the guide block 87, so that the pulling rod 83 can stably drive the screening net 7 to move.

[0024] like Figure 8 As shown, the support and reset assembly 9 includes a fixed plate 92, which is fixedly connected to the crushing box 1 at the lower side of the screening mesh 7, and the fixed plate 92 is away from the guide block 87. A spring 91 is fixedly connected between the fixed plate 92 and the screening mesh 7. A slide bar 93 is slidably connected to one side of the fixed plate 92, and the top of the slide bar 93 is fixedly connected to the lower end of the screening mesh 7. By setting the support and reset assembly 9, the fixed plate 92 is fixed to the lower side of the screening mesh 7, and the spring 91 is fixed between the fixed plate 92 and the screening mesh 7, so that the screening mesh 7 can be supported, and the screening mesh 7 can be reset after moving, and the slide bar 93 under the screening mesh 7 slides on the fixed plate 92 to make the spring 91 more stable in shape.

[0025] like Figure 6 As shown, shielding plates 10 are fixedly connected to both sides of the lower end of the screening net 7, and the shielding plates 10 cover the fixed plate 92 and the guide block 87; by setting the shielding plates 10, the steel slag can be prevented from falling and hitting the pulling assembly 8 and the supporting reset assembly 9.

[0026] like Figure 3 As shown, the second drive assembly 16 includes a third motor 161, the third motor 161 is fixedly connected to one side of the screening box 2, the output end of the third motor 161 is fixedly connected to the third sprocket 162, and the side of the screening box 2 away from the third sprocket 162 is rotatably connected to the fourth sprocket 164, one side of the third sprocket 162 is fixedly connected to one side of a scraper roller 15, one side of the fourth sprocket 164 is fixedly connected to one side of another scraper roller 15, and the third sprocket 162 is transmission-connected to the fourth sprocket 164 through the second chain 163; by setting the second drive assembly 16, the third motor 161 rotates the third sprocket 162, and the third sprocket 162 is transmission-connected to the fourth sprocket 164 through the second chain 163, so that the two magnetic rollers 14 can rotate, and the position of the magnetic roller 14 is changed to continuously absorb the magnetic steel slag.

[0027] like Figure 1 As shown, the third driving assembly 17 includes a fourth motor 171, the fourth motor 171 is fixedly connected to the other side of the screening box 2, the output end of the fourth motor 171 is fixedly connected to the fifth sprocket 172, and the side of the screening box 2 away from the fifth sprocket 172 is rotatably connected to the sixth sprocket 174, one side of the fifth sprocket 172 is fixedly connected to one side of a magnetic roller 14, one side of the sixth sprocket 174 is fixedly connected to one side of another magnetic roller 14, and the fifth sprocket 172 is transmission-connected to the sixth sprocket 174 through the third chain 173; by setting the third driving assembly 17, the fourth motor 171 rotates the fifth sprocket 172, and the fifth sprocket 172 rotates with the sixth sprocket 174 through the third chain 173, so that the two scraper rollers 15 can be rotated to scrape off the magnetic steel slag on the magnetic roller 14, and the magnetic steel slag flows out through the second guide plate 12.

[0028] The working principle of the present invention is as follows: the first motor 654 drives the first sprocket 651 to rotate, and the first sprocket 651 drives the second sprocket 653 to rotate through the first chain 652, so that the first gear 61 and the third gear 63 can rotate, respectively driving the second gear 62 and the fourth gear 64 to rotate, and the crushing roller 4 and the pulverizing roller 5 rotate at the same time, so that the two crushing rollers 4 crush and bend the incoming steel slag, and the two pulverizing rollers 5 crush the crushed steel slag, so that the subsequent processing process is smoother and more efficient, and the finely crushed steel slag reaches the composite standard and passes through the screening net 7 to enter the next processing unit. Once the steel slag fails to pass through the screening net 7, the second motor 81 drives the disc 82 to rotate, so that the disc 82 drives the pulling rod 83 to move, and the pulling rod 83 drives the connecting block 84 to move, and the connecting block 84 deforms the spring 91, and the sliding rod 93 slides on the fixed plate 92, and the guide rod 86 slides on the guide block 87, so that the screening net 7 can be moved up and down, so that the steel slag on the screening net 7 moves upward and enters the pulverizing unit again. The slag is crushed in the roller 5 so that the slag is crushed relatively evenly, and there is no need to repeatedly put the slag into the processing, which reduces the processing difficulty and time. After the qualified slag falls from the screening net 7, it enters the screening box 2 through the first guide plate 11. The fourth motor 171 drives the fifth sprocket 172 to rotate the sixth sprocket 174 through the third chain 173, so that the two magnetic rollers 14 can be rotated, and the magnetic slag passing through the magnetic roller 14 is adsorbed. The non-magnetic slag continues to fall downward, and the magnetic slag rotates on the magnetic roller 14. The third motor 161 drives the third sprocket 162 to rotate the fourth sprocket 164 through the second chain 163, so that the scraper roller 15 can be rotated. The scraper roller 15 is rotated to scrape off the magnetic slag on the magnetic roller 14, and the scraper roller 15 flows to the discharge hole 13 through the second guide plate 12 for discharge, so that the magnetic and non-magnetic slag can be separated, effectively reducing the difficulty of waste treatment caused by mixed magnetic and non-magnetic materials, making the recycling process simpler and more efficient, improving the recycling efficiency, and facilitating resource reuse.

[0029] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A road slag pretreatment equipment, characterized in that: The equipment structure comprises a crushing box (1), the lower end of the crushing box (1) is fixedly connected to a screening box (2), and the lower end of the screening box (2) is fixedly connected to a base (3); a crushing roller (4) is rotatably connected to one side of the crushing box (1), a crushing roller (5) is rotatably connected to the lower side of the crushing roller in the crushing box (1), and a transmission mechanism (6) is fixedly connected to one side of the crushing box (1); a screening net (7) is movably connected to the lower side of the crushing roller (5) in the crushing box (1), and pulling components (8) are installed on both sides of the lower end of the screening net (7), and a support reset component (9) is installed on the lower side of the screening net (7) and on one side of the pulling component (8); A first guide plate (11) is fixedly connected to one side of the interior of the screening box (2); a magnetic roller (14) is rotatably connected to a portion below the first guide plate (11) in the screening box (2); a scraper roller (15) is rotatably connected to a portion of the side of the magnetic roller (14) in the screening box (2); a second guide plate (12) is fixedly connected to a portion below the magnetic roller (14) in the screening box (2); a second drive assembly (16) is fixedly connected to an outer wall of one side of the screening box (2); and a third drive assembly (17) is fixedly connected to an outer wall of the other side of the screening box (2); and discharge holes (13) are provided on both sides of the screening box (2); the discharge holes (13) are located on one side of the scraper roller (15).

2. A road slag pretreatment equipment according to claim 1, characterized in that: The transmission mechanism (6) comprises a first gear (61), a second gear (62), a third gear (63), a fourth gear (64) and a first driving assembly (65); one side of the first gear (61) is fixedly connected to one side of one of the crushing rollers (4), and one side of the second gear (62) is fixedly connected to one side of the other crushing roller (4); the third gear (63) is fixedly connected to one side of one of the crushing rollers (5), and the fourth gear (64) is fixedly connected to one side of the other crushing roller (5); the first gear (61) is meshedly connected to the second gear (62), and the third gear (63) is meshedly connected to the fourth gear (64); the first driving assembly (65) is fixedly connected to the crushing box (1) and is located on one side of the first gear (61).

3. A road slag pretreatment equipment according to claim 2, characterized in that: The first driving assembly (65) comprises a first sprocket (651), the first sprocket (651) being fixedly connected to one side of the first gear (61); a second sprocket (653) being fixedly connected to one side of the third gear (63); the first sprocket (651) being transmission-connected to the second sprocket (653) via a first chain (652); a first motor (654) being fixedly connected to an outer wall of one side of the crushing box (1), and an output end of the first motor (654) being fixedly connected to one side of the third sprocket (162).

4. A road slag pretreatment equipment according to claim 3, characterized in that: The pulling assembly (8) comprises a second motor (81), the second motor (81) being fixedly connected to a side of the crushing box (1) away from the first motor (654); a disc (82) being fixedly connected to the output end of the second motor (81), the disc (82) being rotatably connected to the inside of the crushing box (1), a pulling rod (83) being hingedly connected to one side of the disc (82), the upper end of the pulling rod (83) being fixedly connected to a connecting block (84), the top end of the connecting block (84) being fixedly connected to the lower end of the screening net (7).

5. The road slag pretreatment equipment according to claim 4, characterized in that: Both sides of the connecting block (84) are fixedly connected to side blocks (85), and the lower ends of the side blocks (85) are fixedly connected to guide rods (86); both sides of the disc (82) in the crushing box (1) are fixedly connected to guide blocks (87), and one side of the guide rod (86) is slidably connected to the guide blocks (87).

6. The road slag pretreatment equipment according to claim 5, characterized in that: The support reset assembly (9) comprises a fixed plate (92), the fixed plate (92) being fixedly connected to the crushing box (1) and located at the lower side of the screening net (7), and the fixed plate (92) being away from the guide block (87); a spring (91) being fixedly connected between the fixed plate (92) and the screening net (7), a sliding rod (93) being slidably connected to one side of the fixed plate (92), and a top end of the sliding rod (93) being fixedly connected to a lower end of the screening net (7).

7. The road slag pretreatment equipment according to claim 6, characterized in that: Shielding plates (10) are fixedly connected to both sides of the lower end of the screening net (7), and the shielding plates (10) cover the fixed plates (92) and the guide blocks (87).

8. The road slag pretreatment equipment according to claim 1, characterized in that: The second driving assembly (16) comprises a third motor (161), the third motor (161) is fixedly connected to one side of the screening box (2), and the output end of the third motor (161) is fixedly connected to a third sprocket (162); a side of the screening box (2) away from the third sprocket (162) is rotatably connected to a fourth sprocket (164); one side of the third sprocket (162) is fixedly connected to one side of one of the scraper rollers (15), one side of the fourth sprocket (164) is fixedly connected to one side of another of the scraper rollers (15), and the third sprocket (162) is transmission-connected to the fourth sprocket (164) via a second chain (163).

9. The road slag pretreatment equipment according to claim 1, characterized in that: The third driving assembly (17) comprises a fourth motor (171), the fourth motor (171) being fixedly connected to the other side of the screening box (2); the output end of the fourth motor (171) is fixedly connected to a fifth sprocket (172), and the side of the screening box (2) away from the fifth sprocket (172) is rotatably connected to a sixth sprocket (174); one side of the fifth sprocket (172) is fixedly connected to one side of a magnetic roller (14), and one side of the sixth sprocket (174) is fixedly connected to one side of another magnetic roller (14); the fifth sprocket (172) is transmission-connected to the sixth sprocket (174) via a third chain (173).

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