Construction waste crushing device for construction engineering

Abstract

The utility model discloses a construction waste crushing device for constructional engineering, which belongs to the technical field of construction waste crushing and comprises a mounting frame, a crushing box is arranged in the mounting frame, a crushing and separating mechanism is arranged in the crushing box, and the crushing and separating mechanism comprises a feeding groove formed in the upper side of one side of the outer surface of the crushing box. A crushing plate is fixedly connected to the position, close to the lower side of the feeding groove, of the inner surface of the crushing box, and a hydraulic cylinder is fixedly connected to the position, above the crushing plate, of the upper surface of the interior of the crushing box. According to the device, the crushing and separating mechanism is arranged, waste concrete is crushed through cooperation of a crushing plate and a crushing plate, the crushing plate has a certain downward inclination angle, so that the concrete and steel bars can continue to move forwards to a screening plate, and the concrete and the steel bars are separated through screening holes formed in the screening plate; and then the concrete and the steel bars are independently treated, so that the working efficiency of the crushing device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction waste crushing, in particular to a construction waste crushing device for construction engineering. Background Art

[0002] Construction waste refers to the general term for slag, waste concrete, waste bricks and other wastes generated by people in the production activities of the construction industry such as demolition, construction, decoration and repair. These materials are of no help to the building itself, but they are substances generated in the process of construction and need to be treated accordingly in order to achieve the ideal construction of the project. Because it is an overall process, the consideration of its links is more important, and many wastes in construction waste can be reused as renewable resources after sorting, removal or crushing;

[0003] When the existing crushing device is in use, the construction waste is directly put into the crushing device, and then the crushing device is started to crush the construction waste and then recycle it. However, because waste concrete is mainly composed of concrete and steel bars, and the recycling directions of concrete and steel bars are different, waste concrete is mainly processed by crushing, screening and other processes to become crushed stone or recycled aggregate for reuse, and waste steel bars are mainly turned into waste products by shearing, packaging and other methods, and then recycled by melting and recycling. Therefore, it is necessary to separate the concrete and steel bars in the waste concrete, and then crush the concrete and steel bars separately. However, when the existing crushing device crushes the waste concrete, the concrete and steel bars are crushed together, and the steel bars in the waste concrete cannot be separated, so that the crushing device cannot separate the concrete and steel bars in the waste concrete for crushing, thereby reducing the working efficiency of the crushing device. Summary of the invention

[0004] The utility model aims to provide a construction waste crushing device for construction engineering, which can solve the problem that the steel bars in the waste concrete cannot be separated.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a construction waste crushing device for construction engineering, comprising a mounting frame, a crushing box is arranged in the mounting frame, a crushing and separating mechanism is arranged inside the crushing box, the crushing and separating mechanism comprises a feed trough opened on the upper side of one side of the outer surface of the crushing box, a crushing plate is fixedly connected to the position of the inner surface of the crushing box near the lower side of the feed trough, a hydraulic cylinder is fixedly connected to the position above the crushing plate on the inner upper surface of the crushing box, and a crushing plate is fixedly connected to the lower end of the hydraulic cylinder;

[0006] Two mounting plates are fixedly connected to the side of the crushing plate inside the crushing box away from the feed chute, a screening plate is arranged on the upper side between the two mounting plates, a plurality of evenly distributed screening holes are provided on the upper surface of the screening plate, a concrete crushing structure is arranged directly below the crushing plate, and a concrete discharge outlet is provided directly below the concrete crushing structure on the lower surface of the crushing box, a steel bar crushing structure is arranged on the lower side of the mounting plate on the inner surface of the crushing box away from the crushing plate, and a steel bar discharge outlet is provided directly below the steel bar crushing structure on the lower surface of the crushing box.

[0007] Preferably, a vibration mechanism is provided below the screening plate, and the vibration mechanism includes a No. 1 motor fixedly connected to the outer surface of the mounting plate away from the crushing plate, the output end of the No. 1 motor is fixedly connected to a rotating shaft passing through the two mounting plates, the outer cylindrical surface of the rotating shaft is fixedly connected to a cam near the two mounting plates, and the outer cylindrical surfaces of the two cams are fitted with the lower surface of the screening plate, and the upper surface of the screening plate is fixedly connected to four straight rods evenly distributed in a rectangular shape, and the inner surface of the crushing box is fixedly connected to a mounting box near the upper ends of the four straight rods, and the upper ends of the four straight rods pass through the lower surface of the mounting box, and the outer cylindrical surfaces of the four straight rods are slidably connected to the inner surface of the mounting box.

[0008] Preferably, the upper ends of the four straight rods all pass through the installation box and are fixedly connected to limiting blocks inside the installation box, and the upper surfaces of the four limiting blocks are located inside the installation box and are provided with springs.

[0009] Preferably, a conveyor belt is provided on the lower side of the inner surface of the feed trough.

[0010] Preferably, the upper surface of the crushing plate is fixedly connected with a plurality of evenly distributed No. 1 crushing protrusions, and the lower surface of the crushing plate is fixedly connected with a plurality of evenly distributed No. 2 crushing protrusions, and the positions of the No. 1 crushing protrusion and the No. 2 crushing protrusion are staggered.

[0011] Preferably, the concrete crushing structure includes two concrete crushing rollers rotatably connected to the bottom of the crushing plate, one end of each of the two concrete crushing rollers passes through the crushing box and is fixedly connected to a gear, and the two gears are meshed with each other, a protective box is fixedly connected to the outer surface of the crushing box near the two gears, and the other end of one of the two concrete crushing rollers passes through the crushing box and is fixedly connected to the output end of the No. 2 motor.

[0012] Preferably, the steel bar crushing structure includes two steel bar crushing rollers rotatably connected to the lower side of the inner surface mounting plate of the crushing box away from the crushing plate, and one end of the two steel bar crushing rollers passes through the crushing box and is fixedly connected to the output end of the No. 3 motor.

[0013] Preferably, a No. 2 guide plate is fixedly connected to the lower end of one of the two mounting plates away from the crushing plate, and one end of the No. 2 guide plate is located directly above the middle of the two concrete crushing rollers, and two No. 1 guide plates are fixedly connected to the side of the inner surface mounting plate of the crushing box away from the crushing plate, and the two No. 1 guide plates are located directly above the middle of the two steel bar crushing rollers.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The present application sets a crushing and separation mechanism, firstly puts the whole waste concrete containing steel bars into the crushing box, and then crushes the waste concrete through the cooperation of the crushing plate and the crushing plate, thereby crushing the whole waste concrete, so that the concrete and the steel bars are separated, and because the crushing plate has a certain downward inclination angle, the concrete and the steel bars can continue to move forward to the screening plate, and then the concrete and the steel bars are separated by the screening plate, so that the concrete falls under the screening plate and is discharged from the concrete discharge port, while the steel bars continue to move forward and are discharged from the steel bar discharge port, thereby separating the concrete and the steel bars, and then the concrete and the steel bars are processed separately, so that the crushing device can better crush the concrete containing steel bars, thereby improving the working efficiency of the crushing device;

[0016] 2. The present application sets up a vibration mechanism, which can drive the cam to rotate through motor No. 1, thereby driving the screening plate to move up and down, causing the screening plate to vibrate up and down, and then driving the concrete and steel bars on the screening plate to vibrate up and down. Through the vibration of the concrete and steel bars, the concrete can be better separated through the screening plate, and at the same time, it can prevent the concrete from clogging the screening holes, so that the concrete and steel bars can be better separated, thereby improving the separation effect of the crushing and separation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the overall structural view of the utility model;

[0019] Figure 2 This is a cross-sectional view of the crushing and separation mechanism of the utility model;

[0020] Figure 3 It is a cross-sectional view of the vibration mechanism of the utility model;

[0021] Figure 4 For the utility model Figure 3 A magnified view of center A;

[0022] Figure 5 It is a cross-sectional view of the overall structure of the utility model;

[0023] Figure 6 It is a side sectional view of the overall structure of the utility model.

[0024] Description of reference numerals:

[0025] 1. Mounting frame; 2. Crushing box; 3. Crushing and separation mechanism; 31. Feed chute; 32. Conveyor belt; 33. Crushing plate; 34. Hydraulic cylinder; 35. Crushing plate; 36. Mounting plate; 37. Screening plate; 38. Screening hole; 39. No. 1 guide plate; 310. No. 2 guide plate; 311. No. 1 crushing protrusion; 312. No. 2 crushing protrusion; 4. Vibrating mechanism; 41. No. 1 motor; 42. Rotating shaft; 43. Cam; 44. Mounting box; 45. Straight rod; 46. Limit block; 47. Spring; 5. Concrete crushing structure; 51. No. 2 motor; 52. Concrete crushing roller; 53. Gear; 54. Protective box; 6. Steel bar crushing structure; 61. No. 3 motor; 62. Steel bar crushing roller; 7. Concrete discharge outlet; 8. Steel bar discharge outlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 6 , the utility model provides a technical solution:

[0028] A construction waste crushing device for construction engineering, comprising a mounting frame 1, a crushing box 2 is arranged in the mounting frame 1, a crushing and separating mechanism 3 is arranged inside the crushing box 2, the crushing and separating mechanism 3 comprises a feed trough 31 opened on the upper side of one side of the outer surface of the crushing box 2, a crushing plate 33 is fixedly connected to the position of the inner surface of the crushing box 2 near the lower side of the feed trough 31, a hydraulic cylinder 34 is fixedly connected to the position above the crushing plate 33 on the inner upper surface of the crushing box 2, and a crushing plate 35 is fixedly connected to the lower end of the hydraulic cylinder 34;

[0029] Two mounting plates 36 are fixedly connected to the side of the crushing plate 33 inside the crushing box 2 away from the feed trough 31, a screening plate 37 is arranged on the upper side between the two mounting plates 36, and a plurality of evenly distributed screening holes 38 are provided on the upper surface of the screening plate 37, a concrete crushing structure 5 is arranged directly below the crushing plate 33, and a concrete discharge port 7 is provided directly below the concrete crushing structure 5 on the lower surface of the crushing box 2, a steel bar crushing structure 6 is arranged on the lower side of the mounting plate 36 on the inner surface of the crushing box 2 away from the crushing plate 33, and a steel bar discharge port 8 is provided directly below the steel bar crushing structure 6 on the lower surface of the crushing box 2.

[0030] Specifically, Figure 2 As shown, a conveyor belt 32 is provided on the lower side of the inner surface of the feed trough 31 .

[0031] Specifically, Figure 2 , Figure 3 , Figure 4 As shown, the upper surface of the crushing plate 33 is fixedly connected with a plurality of evenly distributed No. 1 crushing protrusions 311, and the lower surface of the crushing plate 35 is fixedly connected with a plurality of evenly distributed No. 2 crushing protrusions 312, and the positions of the No. 1 crushing protrusions 311 and the No. 2 crushing protrusions 312 are staggered with each other.

[0032] The existing crushing device cannot crush concrete containing steel bars, so a crushing and separation mechanism 3 is set up to put the entire waste concrete containing steel bars into the feed trough 31, and then start the conveyor belt 32 to drive the waste concrete to move forward, so that the waste concrete moves to the crushing plate 33, and then start the hydraulic cylinder 34 to drive the crushing plate 35 to move downward. Through the cooperation of the crushing plate 35 and the crushing plate 33, the waste concrete on the crushing plate 33 can be crushed, and the crushing effect of the crushing plate 35 and the crushing plate 33 on the waste concrete can be improved through the first crushing protrusion 311 and the second crushing protrusion 312, so that the concrete and steel bars in the entire waste concrete are separated, and because the crushing plate 33 has a certain The downward inclination angle allows the concrete and the steel bars to continue to move forward to the screening plate 37, and the concrete and the steel bars are separated through the screening holes 38 opened on the screening plate 37, so that the concrete falls under the screening plate 37, and then enters the concrete crushing structure 5 for processing, and then is discharged from the concrete discharge port 7. At the same time, the steel bars continue to move forward, so that the steel bars enter the concrete crushing structure 5 for processing, and the steel bar crushing structure 6, and then are discharged from the steel bar discharge port 8. Therefore, after the waste concrete containing the steel bars is crushed, the concrete and the steel bars are separated, and then the concrete and the steel bars are processed separately, so that the crushing device can better crush the concrete containing the steel bars, thereby improving the working efficiency of the crushing device.

[0033] Specifically, Figure 3 , Figure 4As shown, a vibration mechanism 4 is provided below the screening plate 37, and the vibration mechanism 4 includes a No. 1 motor 41 fixedly connected to the outer surface of the mounting plate 36 away from the crushing plate 33, and the output end of the No. 1 motor 41 is fixedly connected to a rotating shaft 42 that passes through the two mounting plates 36, and the outer cylindrical surface of the rotating shaft 42 is fixedly connected to a cam 43 near the two mounting plates 36, and the outer cylindrical surfaces of the two cams 43 are fitted with the lower surface of the screening plate 37, and the upper surface of the screening plate 37 is fixedly connected to four straight rods 45 evenly distributed in a rectangular shape, and the inner surface of the crushing box 2 is fixedly connected to a mounting box 44 near the upper ends of the four straight rods 45, and the upper ends of the four straight rods 45 pass through the lower surface of the mounting box 44, and the outer cylindrical surfaces of the four straight rods 45 are slidably connected to the inner surface of the mounting box 44.

[0034] Specifically, Figure 4 As shown, the upper ends of the four straight rods 45 all penetrate the installation box 44 and are fixedly connected to the limiting blocks 46 inside the installation box 44. The upper surfaces of the four limiting blocks 46 are located inside the installation box 44 and are provided with springs 47.

[0035] In the above embodiment, concrete and steel bars are separated by the screening plate 37 and the screening holes 38. However, because the screening plate 37 is stationary, the separation effect of concrete and steel bars is poor, and the concrete is easily blocked in the screening holes 38. Therefore, a vibration mechanism 4 is set. First, the No. 1 motor 41 is started to drive the rotating shaft 42 to rotate, thereby driving the two cams 43 to rotate at the same time, and then driving the screening plate 37 to move up and down in the two mounting plates 36, and at the same time driving the straight rod 45 to move up and down in the mounting box 44. When the straight rod 45 moves upward, the limit block 46 is driven to move upward, and the spring 47 is compressed at the same time. Then, when the straight rod 45 moves downward, the spring 47 is reset to better drive the straight rod 45 to move downward, so that the screening plate 37 vibrates up and down, and then drives the concrete and steel bars to vibrate up and down, so that the concrete and steel bars can be better separated, thereby improving the separation effect of the crushing and separation mechanism 3 and preventing the concrete from easily blocking the screening holes 38.

[0036] Specifically, Figure 5 , Figure 6 As shown, the concrete crushing structure 5 includes two concrete crushing rollers 52 rotatably connected to the bottom of the crushing plate 33, one end of the two concrete crushing rollers 52 passes through the crushing box 2 and is fixedly connected to a gear 53, and the two gears 53 are meshed and connected to each other, and a protective box 54 is fixedly connected to the outer surface of the crushing box 2 near the two gears 53, and the other end of one of the two concrete crushing rollers 52 passes through the crushing box 2 and is fixedly connected to the output end of the second motor 51.

[0037] Specifically, Figure 5As shown, the steel bar crushing structure 6 includes two steel bar crushing rollers 62 rotatably connected to the lower side of the inner surface mounting plate 36 of the crushing box 2 away from the crushing plate 33, and one end of the two steel bar crushing rollers 62 passes through the crushing box 2 and is fixedly connected to the output end of the third motor 61.

[0038] Specifically, Figure 5 As shown, the lower end of one of the two mounting plates 36 away from the crushing plate 33 is fixedly connected with a No. 2 guide plate 310, and one end of the No. 2 guide plate 310 is located directly above the middle of the two concrete crushing rollers 52, and the inner surface mounting plate 36 of the crushing box 2 is fixedly connected to one side away from the crushing plate 33 with two No. 1 guide plates 39, and the two No. 1 guide plates 39 are located directly above the middle of the two steel bar crushing rollers 62.

[0039] In the above embodiment, after the concrete and the steel bar are separated by the crushing and separation mechanism 3 and the vibration mechanism 4, the concrete and the steel bar enter the concrete crushing structure 5 and the steel bar crushing structure 6 respectively, so as to further crush the concrete and the steel bar. The concrete passes through the No. 2 guide plate 310, which can guide the concrete to the middle of the two concrete crushing rollers 52, so that the concrete can better enter the middle of the two concrete crushing rollers 52. At the same time, the No. 2 motor 51 is started to drive one concrete crushing roller 52 to rotate, and then through the meshing of the two gears 53, the two concrete crushing rollers 52 can be driven to rotate toward the middle at the same time, so that the concrete entering the middle of the two concrete crushing rollers 52 is secondary crushed, and finally the crushed concrete is discharged through the concrete discharge port 7. Then, the steel bar passes through the two No. 1 guide plates 39, which can guide the steel bar to the middle of the two steel bar crushing rollers 62, so that the steel bar can better enter the middle of the two steel bar crushing rollers 62. At the same time, the No. 3 motor 61 is started to drive the two steel bar crushing rollers 62 to rotate toward the middle at the same time, so that the steel bar entering the middle of the two steel bar crushing rollers 62 is secondary crushed, and finally the crushed concrete is discharged through the steel bar discharge port 8, which further improves the crushing effect of the crushing device.

[0040] Working principle: When the present application is in use, firstly, the waste concrete is put into the feed trough 31, and then the conveyor belt 32 is started to drive the waste concrete to move to the crushing plate 33, and then the hydraulic cylinder 34 is started to drive the crushing plate 35 to move downward, and the waste concrete is crushed by the cooperation of the crushing plate 35 and the crushing plate 33, and the concrete and steel bars in the waste concrete are separated. Moreover, because the crushing plate 33 has a certain downward tilt angle, the concrete and steel bars can continue to move forward to the screening plate 37, and at the same time, the No. 1 motor 41 is started to drive the rotating shaft 42 to rotate, thereby driving the two cams 43 to rotate at the same time, and then driving the screening plate 37 to move up and down, so that the screening plate 37 vibrates up and down, and finally drives the concrete and steel bars to vibrate up and down, so that the concrete and steel bars can be better separated, and then the concrete passes through the No. 2 The guide plate 310 guides the middle of the two concrete crushing rollers 52, and then the No. 2 motor 51 is started to drive one concrete crushing roller 52 to rotate, and then through the meshing of the two gears 53, the two concrete crushing rollers 52 can be driven to rotate toward the middle at the same time, so that the concrete entering the middle of the two concrete crushing rollers 52 is crushed for the second time, and finally the crushed concrete is discharged through the concrete discharge port 7. At the same time, the steel bars pass through the two No. 1 guide plates 39, which can guide the steel bars to the middle of the two steel bar crushing rollers 62, so that the steel bars can better enter the middle of the two steel bar crushing rollers 62. At the same time, the No. 3 motor 61 is started to drive the two steel bar crushing rollers 62 to rotate toward the middle at the same time, so that the steel bars entering the middle of the two steel bar crushing rollers 62 are crushed for the second time, and finally the crushed concrete is discharged through the steel bar discharge port 8.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A construction waste crushing device for construction engineering, comprising a mounting frame (1), wherein a crushing box (2) is arranged in the mounting frame (1), characterized in that: A crushing and separation mechanism (3) is provided inside the crushing box (2), and the crushing and separation mechanism (3) comprises a feed trough (31) opened on the upper side of one side of the outer surface of the crushing box (2), a crushing plate (33) is fixedly connected to the inner surface of the crushing box (2) near the lower side of the feed trough (31), a hydraulic cylinder (34) is fixedly connected to the upper position of the crushing plate (33) on the inner upper surface of the crushing box (2), and a crushing plate (35) is fixedly connected to the lower end of the hydraulic cylinder (34); Two mounting plates (36) are fixedly connected to the side of the crushing plate (33) inside the crushing box (2) away from the feed trough (31); a screening plate (37) is arranged on the upper side between the two mounting plates (36); a plurality of evenly distributed screening holes (38) are provided on the upper surface of the screening plate (37); a concrete crushing structure (5) is arranged directly below the crushing plate (33); a concrete discharge port (7) is provided directly below the concrete crushing structure (5) on the lower surface of the crushing box (2); a steel bar crushing structure (6) is arranged on the lower side of the mounting plate (36) on the inner surface of the crushing box (2) away from the crushing plate (33); and a steel bar discharge port (8) is provided directly below the steel bar crushing structure (6) on the lower surface of the crushing box (2).

2. The construction waste crushing device for construction engineering according to claim 1, characterized in that: A vibration mechanism (4) is provided below the screening plate (37), and the vibration mechanism (4) comprises a first motor (41) fixedly connected to the outer surface of the mounting plate (36) at a side away from the crushing plate (33), the output end of the first motor (41) being fixedly connected to a rotating shaft (42) penetrating the two mounting plates (36), the outer cylindrical surface of the rotating shaft (42) being fixedly connected to a cam (43) at a position close to the two mounting plates (36), and the outer cylindrical surfaces of the two cams (43) are in contact with the lower surface of the screening plate (37), and the upper surface of the screening plate (37) is fixedly connected to four straight rods (45) evenly distributed in a rectangular shape, and the inner surface of the crushing box (2) is fixedly connected to a mounting box (44) at a position close to the upper ends of the four straight rods (45), and the upper ends of the four straight rods (45) penetrate the lower surface of the mounting box (44), and the outer cylindrical surfaces of the four straight rods (45) are slidably connected to the inner surface of the mounting box (44).

3. A construction waste crushing device for construction engineering according to claim 2, characterized in that: The upper ends of the four straight rods (45) all penetrate the installation box (44) and are fixedly connected to the limiting blocks (46) inside the installation box (44); the upper surfaces of the four limiting blocks (46) are located inside the installation box (44) and are provided with springs (47).

4. The construction waste crushing device for construction engineering according to claim 1, characterized in that: A conveyor belt (32) is provided on the lower side of the inner surface of the feed trough (31).

5. The construction waste crushing device for construction engineering according to claim 1, characterized in that: The upper surface of the crushing plate (33) is fixedly connected with a plurality of evenly distributed No. 1 crushing protrusions (311), and the lower surface of the crushing plate (35) is fixedly connected with a plurality of evenly distributed No. 2 crushing protrusions (312), and the positions of the No. 1 crushing protrusions (311) and the No. 2 crushing protrusions (312) are staggered.

6. The construction waste crushing device for construction engineering according to claim 1, characterized in that: The concrete crushing structure (5) comprises two concrete crushing rollers (52) rotatably connected to the lower part of the crushing plate (33), one end of each of the two concrete crushing rollers (52) passes through the crushing box (2) and is fixedly connected to a gear (53), and the two gears (53) are meshed and connected to each other, a protective box (54) is fixedly connected to the outer surface of the crushing box (2) near the two gears (53), and the other end of one of the two concrete crushing rollers (52) passes through the crushing box (2) and is fixedly connected to the output end of the second motor (51).

7. The construction waste crushing device for construction engineering according to claim 1, characterized in that: The steel bar crushing structure (6) comprises two steel bar crushing rollers (62) rotatably connected to the lower side of the inner surface mounting plate (36) of the crushing box (2) away from the crushing plate (33), and one end of the two steel bar crushing rollers (62) penetrates the crushing box (2) and is fixedly connected to the output end of the third motor (61).

8. A construction waste crushing device for construction engineering according to any one of claims 6 or 7, characterized in that: A second guide plate (310) is fixedly connected to the lower end of one of the two mounting plates (36) that is away from the crushing plate (33), and one end of the second guide plate (310) is located directly above the middle of the two concrete crushing rollers (52). Two first guide plates (39) are fixedly connected to the side of the inner surface mounting plate (36) of the crushing box (2) that is away from the crushing plate (33), and the two first guide plates (39) are located directly above the middle of the two steel bar crushing rollers (62).

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