Concrete crushing device and method of using the same

Abstract

The present invention discloses a concrete crushing device and a method for using the same, which comprises a frame, the frame is provided with two support plates, the frame is provided with a cutting assembly located above the support plates, the cutting assembly comprises a support frame, a first hydraulic cylinder, a cross plate and a plurality of cutters, a plurality of connecting rods are fixedly provided on the lower end surface of the cross plate, the lower end of the connecting rod is fixedly connected to the cutter, a crushing chamber is fixedly provided below the frame, a first extrusion roller and a second extrusion roller are rotatably connected in the crushing chamber, the first extrusion roller and the second extrusion roller are both provided with a plurality of sawtooth protrusions, an extrusion gap is provided between the first extrusion roller and the second extrusion roller, a second motor is fixedly provided on the outer wall of the crushing chamber, the output shaft of the second motor is fixedly connected to the first extrusion roller, the output shaft of the second motor is fixedly connected to the first gear, the outer wall of the crushing chamber is rotatably connected to the second gear meshing with the first gear, and the second gear is fixedly connected to the second extrusion roller. The present application has the effect of improving the crushing efficiency of concrete slabs.

Description

Technical Field

[0001] The invention relates to the field of building materials, and in particular to a concrete crushing device and a use method thereof. Background Art

[0002] In the field of construction engineering, concrete is a commonly used building material. Concrete refers to an engineering composite material in which aggregates are bonded together by a cementitious material. General concrete is made of cement as a cementitious material, sand and stone as aggregates, and water in a certain proportion and mixed.

[0003] In the related art, when new buildings are being constructed, old buildings need to be demolished. During the demolition of old buildings, the old buildings need to be demolished by blasting, and the demolished old buildings will produce a variety of building materials. The concrete slabs of the demolished old buildings are large in volume, and are generally hammered manually with a hammer to hammer the concrete slabs into small pieces, which makes it easier to move and transport the smaller concrete blocks.

[0004] With respect to the above-mentioned related technologies, the inventors believe that manual crushing of concrete slabs consumes a lot of manpower and physical strength and takes a long time, and the manual crushing efficiency of concrete slabs is poor. Summary of the invention

[0005] In order to improve the crushing efficiency of concrete slabs, the present application provides a concrete crushing device and a method of using the same.

[0006] In a first aspect, the present application provides a concrete crushing device, which adopts the following technical solution:

[0007] A concrete crushing device comprises a frame, wherein the frame is provided with two support plates parallel to each other, a drop gap is provided between the support plates on both sides, the frame is provided with a cutting assembly located above the support plates, the cutting assembly comprises a support frame, a first hydraulic cylinder, a cross plate and a plurality of cutters, the support frame is fixedly connected to the frame, the first hydraulic cylinder is fixedly arranged on the support frame, the output end of the first hydraulic cylinder is fixedly connected to the cross plate, a plurality of connecting rods are fixedly arranged on the lower end surface of the cross plate, the lower end of the connecting rod is fixedly connected to the cutter, a crushing bin corresponding to the drop gap is fixedly arranged below the support frame, a first squeezing roller and a second squeezing roller parallel to each other are rotatably connected in the crushing bin, the first squeezing roller and the second squeezing roller are both provided with a plurality of sawtooth protrusions, an squeezing gap is provided between the first squeezing roller and the second squeezing roller, a second motor is fixedly arranged on the outer wall of the crushing bin, the output shaft of the second motor is fixedly connected to the first squeezing roller, the output shaft of the second motor is fixedly connected to the first gear, the outer wall of the crushing bin is rotatably connected to a second gear meshing with the first gear, and the second gear is fixedly connected to the second squeezing roller.

[0008] By adopting the above technical solution, when the concrete crushing device is in use, the concrete slab is placed on the two support plates, the first hydraulic cylinder drives the cross plate to move downward, so that the cutter moves downward to cut the concrete slab into several pieces, and the cut concrete slab falls into the crushing bin, the second motor causes the first extrusion roller and the second extrusion roller to rotate towards each other, and the serrated protrusions extrude and crush the block-shaped concrete slab falling into the extrusion gap, and the block-shaped concrete slab is squeezed and crushed into small concrete pieces, which has a better crushing effect on the concrete, saves manpower and material resources, is relatively time-saving, and improves the crushing efficiency of the concrete slab.

[0009] Optionally, the supporting frame is provided with the drilling assembly, and the drilling assembly includes a second hydraulic cylinder, a positioning plate, a center gear, a third motor, a driving gear, four transmission gears and four auger rods. The second hydraulic cylinder is fixedly connected to the supporting frame, the output end of the second hydraulic cylinder is fixedly connected to the positioning plate, the center gear is respectively meshed with the four transmission gears, the driving gear is meshed with one of the transmission gears, the output shaft of the third motor is fixedly connected to the driving gear, the center gear and the driving gear are both rotatably connected to the positioning plate, the upper end of the auger rod is penetrated by the positioning plate and fixedly connected to the transmission gear, and the auger rod is rotatably connected to the positioning plate.

[0010] By adopting the above technical solution, before the cutter cuts the concrete slab, the second hydraulic cylinder drives the positioning plate to move downward, and the third motor drives the driving gear to rotate, so that the central gear drives the other three transmission gears to rotate, thereby realizing the rotation of the auger rod. When the second hydraulic cylinder drives the positioning plate to move downward, the auger rod moves downward to drill four through holes on the concrete slab while rotating, so that the concrete slab is easier to break when the cutter cuts the concrete slab, which is beneficial to reducing the time the cutter takes to cut the concrete slab.

[0011] Optionally, the connecting rod in the middle of the horizontal plate is set as a main rod, the main rod passes through the central gear and the positioning plate, and the main rod is slidingly connected to the central gear and the positioning plate, and a horizontal knife fixed vertically to the cutting knife is fixedly connected below the main rod.

[0012] By adopting the above technical solution, when the first hydraulic cylinder drives the cross plate and the main rod to move downward, the cross knife at the lower end of the main rod cooperates with the four through holes, so that the cutter can cut the concrete slab more easily when moving downward, which is beneficial to improving the crushing efficiency of the concrete slab.

[0013] Optionally, the frame is fixedly provided with a plurality of the limiting inclined plates, and an inclined material guide plate is fixedly provided at the upper end of the crushing bin, and the material guide plate corresponds to the extrusion gap.

[0014] By adopting the above technical solution, the limiting inclined plate limits the cut concrete slab, reducing the probability of the concrete slab falling to the outside of the frame; the concrete slab cut by the cutter slides into the crushing bin through the inclined surface of the guide plate, which is beneficial to increase the probability of the block concrete slab falling into the extrusion gap and accelerate the crushing speed of the block concrete slab.

[0015] Optionally, the first extrusion roller and the second extrusion roller are both fixedly provided with a paddle, and the first extrusion roller and the second extrusion roller are both provided with an annular groove matched with the paddle.

[0016] By adopting the above technical solution, the paddles on the first squeezing roller and the second squeezing roller rotate towards each other, and the block concrete slab in the crushing bin is pushed into the squeezing gap, which is beneficial to speed up the crushing speed of the block concrete slab.

[0017] Optionally, a vibration motor is fixedly provided on the outer wall of the crushing bin.

[0018] By adopting the above technical solution, the vibration motor drives the crushing bin to vibrate, which is beneficial to accelerate the falling of small concrete blocks and speed up the processing time of concrete blocks.

[0019] Optionally, a discharge port is provided at the lower end of the crushing bin, and a material receiving box corresponding to the discharge port is provided below the crushing bin.

[0020] By adopting the above technical solution, the material receiving box is convenient for collecting and processing small pieces of concrete. In the second aspect, the present application provides a method for using a concrete crushing device, which adopts the following technical solution:

[0021] A method for using a concrete crushing device, comprising: when the concrete crushing device is in use, a concrete slab is placed on two support plates, an operator causes the first hydraulic cylinder to drive the cross plate to move downward, and then the cutter cuts the concrete slab into a plurality of pieces, and the cut concrete slab falls into the crushing bin, and the operator then starts the second motor, the rotation of the second motor drives the first gear and the first extrusion roller to rotate, and then the second gear drives the second extrusion roller to rotate, the first extrusion roller and the second extrusion roller rotate towards each other, and then the serrated protrusions on the first extrusion roller and the second extrusion roller extrude and crush the block concrete slab falling into the extrusion gap, and extrude and crush the block concrete slab into small concrete pieces with smaller particle sizes.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the concrete crushing device is in use, the concrete slab is placed on two supporting plates, the first hydraulic cylinder drives the horizontal plate to move downward, so that the cutter moves downward to cut the concrete slab into several pieces, and the cut concrete slab falls into the crushing bin, the second motor makes the first squeezing roller and the second squeezing roller rotate towards each other, and the sawtooth protrusion squeezes and crushes the block concrete slab falling into the squeezing gap, squeezing and crushing the block concrete slab into small concrete pieces, which has a better crushing effect on concrete, saves manpower and material resources, is relatively time-saving, and improves the crushing efficiency of the concrete slab;

[0024] 2. Before the cutter cuts the concrete slab, the second hydraulic cylinder drives the positioning plate downward, and the third motor drives the driving gear to rotate, so that the center gear drives the other three transmission gears to rotate, thereby realizing the rotation of the auger rod. During the process of the second hydraulic cylinder driving the positioning plate downward, the auger rod moves downward while rotating to drill four through holes on the concrete slab, thereby making it easier for the cutter to break the concrete slab when it is cutting down, thereby reducing the time it takes for the cutter to cut the concrete slab. Before the cutter cuts the concrete slab, the second hydraulic cylinder drives the positioning plate downward, and the third motor drives the driving gear to rotate, thereby making the center gear drives the other three transmission gears to rotate, thereby realizing the rotation of the auger rod. During the process of the second hydraulic cylinder driving the positioning plate downward, the auger rod moves downward while rotating to drill four through holes on the concrete slab, thereby making it easier for the cutter to break the concrete slab when it is cutting down, thereby reducing the time it takes for the cutter to cut the concrete slab;

[0025] 3. When the first hydraulic cylinder drives the cross plate and the main rod to move downward, the cross knife at the lower end of the main rod cooperates with the four through holes, making it easier for the cutter to cut the concrete slab when moving downward, which is beneficial to improving the crushing efficiency of the concrete slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a concrete crushing device according to an embodiment of the present application.

[0027] Figure 2 Schematic diagram to highlight the structure of cutting components and drilling components.

[0028] Figure 3 It is a schematic diagram of the structure of the first extrusion roller and the second extrusion roller.

[0029] Among them, the figure markings are: 1, frame; 2, support plate; 3, cutting assembly; 4, support frame; 5, first hydraulic cylinder; 6, cross plate; 7, cutter; 8, connecting rod; 9, crushing chamber; 10, first extrusion roller; 11, second extrusion roller; 12, serrated protrusion; 13, second motor; 14, first gear; 15, second gear; 16, drilling assembly; 17, second hydraulic cylinder; 18, positioning plate; 19, center gear; 20, third motor; 21, driving gear; 22, transmission gear; 23, main rod; 24, cross knife; 25, limiting inclined plate; 27, dial plate; 28, annular groove; 29, vibration motor; 30, material receiving box; 31, spiral drill rod. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0031] See also Figure 1-3 , the present application is further described in detail below in conjunction with all the drawings. The present application embodiment discloses a concrete crushing device.

[0032] Example

[0033] Reference Figure 1 A concrete crushing device includes a frame 1, which is made of cast iron and has good rigidity and load-bearing capacity. The frame 1 is fixed with two mutually parallel support plates 2, and a drop gap is provided between the support plates 2. When the concrete crushing device is in use, a concrete plate is placed on the two support plates 2.

[0034] Reference Figure 1 and Figure 2The frame 1 is provided with a cutting assembly 3 located above the support plate 2. The cutting assembly 3 includes a support frame 4, a first hydraulic cylinder 5, a cross plate 6 and a plurality of cutters 7. The support frame 4 is fixedly connected to the frame 1. The first hydraulic cylinder 5 is fixedly arranged on the support frame 4. The output end of the first hydraulic cylinder 5 is fixedly connected to the cross plate 6. A plurality of connecting rods 8 are fixedly arranged on the lower end surface of the cross plate 6. The lower end of the connecting rod 8 is fixedly connected to the cutter 7. The operator starts the first hydraulic cylinder 5, and the output end of the first hydraulic cylinder 5 extends, driving the cross plate 6 to move downward, thereby driving all the cutters 7 to move downward, and cutting the concrete slab into multiple pieces.

[0035] Reference Figure 1 and Figure 2 When the cutter 7 cuts the concrete slab, the frame 1 is fixedly connected with a plurality of limiting inclined plates 25, and the cut concrete slab contacts the limiting inclined plates 25, which limit the cut concrete slab and reduce the probability of the concrete slab falling outside the frame 1.

[0036] Reference Figure 1 and Figure 2 A drilling assembly 16 is provided on the support frame 4, and the drilling assembly 16 includes a second hydraulic cylinder 17, a positioning plate 18, a central gear 19, a third motor 20, a driving gear 21, four transmission gears 22 and four spiral drill rods 31. The second hydraulic cylinder 17 is fixedly connected to the support frame 4, and the output end of the second hydraulic cylinder 17 is fixedly connected to the positioning plate 18. Before the cutter 7 cuts the concrete slab, the operator starts the second hydraulic cylinder 17, and the output end of the second hydraulic cylinder 17 moves downward to drive the positioning plate 18 to move downward.

[0037] Reference Figure 1 and Figure 2 , the driving gear 21 meshes with one of the transmission gears 22, the third motor 20 is fixed on the positioning plate 18, the output shaft of the third motor 20 is fixedly connected with the driving gear 21, and the operator starts the third motor 20, the output shaft of the third motor 20 rotates to drive the driving gear 21 to rotate, and the driving gear 21 drives the transmission gear 22 meshed therewith to rotate. The central gear 19 meshes with the four transmission gears 22 respectively, and the central gear 19 and the driving gear 21 are both rotationally connected with the positioning plate 18, so that the central gear 19 drives the other three transmission gears 22 to rotate.

[0038] Reference Figure 1 and Figure 2The upper end of the auger rod 31 penetrates the positioning plate 18 and is fixedly connected to the transmission gear 22. The auger rod 31 is rotatably connected to the positioning plate 18, and then all the transmission gears 22 drive the auger rod 31 to rotate. During the process of the second hydraulic cylinder 17 driving the positioning plate 18 to move downward, the lower end of the auger rod 31 contacts the concrete slab, and the auger rod 31 moves downward while rotating, thereby drilling four through holes on the concrete slab. The second hydraulic cylinder 17 then drives the positioning plate 18 and the auger rod 31 to move upward, so that the auger rod 31 is separated from the positioning plate 18, and then the concrete slab is easier to break when the cutter 7 cuts down the concrete slab, which can reduce the time for the cutter 7 to cut the concrete slab.

[0039] Reference Figure 1 and Figure 2 The connecting rod 8 in the middle of the horizontal plate 6 is set as a main rod 23, the main rod 23 is penetrated by the central gear 19 and the positioning plate 18, and the main rod 23 is slidably connected with the central gear 19 and the positioning plate 18, and a horizontal knife 24 fixed vertically to the cutter 7 is fixedly connected below the main rod 23. When the first hydraulic cylinder 5 drives the horizontal plate 6 and the main rod 23 to move downward, the cutter 7 at the lower end of the main rod 23 and the horizontal knife 24 form a "cross flower" shape, and the horizontal knife 24 cooperates with the four through holes, so that the cutter 7 is easier to cut the concrete slab when it moves downward.

[0040] Reference Figure 1 and Figure 3 A crushing bin 9 corresponding to the falling gap is fixedly provided below the support frame 4, and the cut concrete slab falls into the crushing bin 9 through the falling gap. A first squeezing roller 10 and a second squeezing roller 11 parallel to each other are rotatably connected in the crushing bin 9. The first squeezing roller 10 and the second squeezing roller 11 are both provided with a plurality of serrated protrusions 12. An squeezing gap is provided between the first squeezing roller 10 and the second squeezing roller 11, and then the cut concrete slab falls into the squeezing gap.

[0041] Reference Figure 1 and Figure 3 The outer wall of the crushing bin 9 is fixedly provided with a second motor 13, the output shaft of the second motor 13 is fixedly connected to the first squeezing roller 10, and the output shaft of the second motor 13 is fixedly connected to the first gear 14. When the operator starts the second motor 13, the output shaft of the second motor 13 rotates to drive the first gear 14 and the first squeezing roller 10 to rotate. The outer wall of the crushing bin 9 is rotatably connected to a second gear 15 meshing with the first gear 14, and the second gear 15 is fixedly connected to the second squeezing roller 11, so that the second gear 15 drives the second squeezing roller 11 to rotate, and the first squeezing roller 10 and the second squeezing roller 11 rotate in opposite directions, and then the sawtooth protrusions 12 on the first squeezing roller 10 and the second squeezing roller 11 squeeze and crush the block concrete slab falling into the squeezing gap, squeezing and crushing the block concrete slab into small concrete pieces with smaller particle sizes, which has a better crushing effect on concrete, saves manpower and material resources, and is relatively time-saving, and can improve the crushing efficiency of the concrete slab.

[0042] Reference Figure 1 A plurality of inclined guide plates are fixed on the upper end of the crushing chamber 9, and the guide plates correspond to the extrusion gap. The concrete slab cut by the cutter 7 falls on the guide plate, and slides into the crushing chamber 9 through the inclined surface of the guide plate. The guide plate corresponds to the extrusion gap, which is conducive to increasing the probability of the block concrete slab falling into the extrusion gap, which is conducive to accelerating the crushing speed of the block concrete slab, and thus improving the crushing efficiency of the concrete slab.

[0043] Reference Figure 1 and Figure 3 When the first squeeze roller 10 and the second squeeze roller 11 rotate toward each other, the first squeeze roller 10 and the second squeeze roller 11 are fixed with a paddle 27. The paddles 27 on the first squeeze roller 10 and the second squeeze roller 11 rotate toward each other at the same time. The paddle 27 paddles the block concrete slab in the crushing bin 9 into the squeeze gap, which is beneficial to speed up the crushing speed of the block concrete slab, thereby improving the crushing efficiency of the concrete slab. The first squeeze roller 10 and the second squeeze roller 11 are both provided with an annular groove 28 that matches the paddle 27, and the annular groove 28 facilitates the paddle 27 to pass through.

[0044] Reference Figure 1 When the crushing bin 9 crushes the block concrete slab, a vibration motor 29 is fixedly installed on the outer wall of the crushing bin 9. The operator starts the vibration motor 29, and the vibration motor 29 drives the crushing bin 9 to vibrate, which can accelerate the falling of small concrete pieces, speed up the processing time of concrete blocks, and improve the crushing efficiency. A discharge port is opened at the lower end of the crushing bin 9, and a receiving box 30 corresponding to the discharge port is arranged below the crushing bin 9. The small concrete pieces squeezed by the first squeezing roller 10 and the second squeezing roller 11 fall into the receiving box 30 through the discharge port, and the receiving box 30 is convenient for collecting and processing the small concrete pieces.

[0045] The implementation principle of a concrete crushing device in an embodiment of the present application is as follows: when the concrete crushing device is in use, a concrete slab is placed on two support plates 2. During the process of the second hydraulic cylinder 17 driving the positioning plate 18 to move downward, the lower end of the auger rod 31 contacts the concrete slab, and the auger rod 31 moves downward while rotating, thereby drilling four through holes on the concrete slab. The operator starts the first hydraulic cylinder 5, and the output end of the first hydraulic cylinder 5 extends, driving the cross plate 6 to move downward, thereby driving all the cutters 7 to move downward, and cutting the concrete slab into multiple pieces. The cut concrete slab falls into the crushing bin 9 through the falling gap, the first squeezing roller 10 and the second squeezing roller 11 rotate towards each other, the paddle 27 paddles the block concrete slab in the crushing bin 9 into the squeezing gap, and then the serrated protrusions 12 on the first squeezing roller 10 and the second squeezing roller 11 squeeze and crush the block concrete slab falling into the squeezing gap, squeezing and crushing the block concrete slab into small concrete pieces with smaller particle sizes, and the small concrete pieces fall into the receiving box 30 through the discharge port, which has a better crushing effect on the concrete, saves manpower and material resources, is relatively time-saving, and can improve the crushing efficiency of the concrete slab.

[0046] The embodiment of the present application also discloses a method for using the concrete crushing device.

[0047] A method for using a concrete crushing device comprises: when the concrete crushing device is in use, a concrete slab is placed on two support plates 2, an operator causes a first hydraulic cylinder 5 to drive a horizontal plate 6 to move downward, and then a cutter 7 cuts the concrete slab into a plurality of pieces, and the cut concrete slab falls into a crushing bin 9, and the operator then starts a second motor 13, and the second motor 13 rotates to drive a first gear 14 and a first extrusion roller 10 to rotate, and then the second gear 15 drives a second extrusion roller 11 to rotate, and the first extrusion roller 10 and the second extrusion roller 11 rotate towards each other, and then the serrated protrusions 12 on the first extrusion roller 10 and the second extrusion roller 11 extrude and crush the block concrete slab falling into the extrusion gap, and extrude and crush the block concrete slab into small concrete pieces with smaller particle sizes.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

[0049] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A concrete crushing device, comprising a frame (1), characterized in that: The frame (1) is provided with two support plates (2) parallel to each other, and a drop gap is provided between the support plates (2) on both sides. The frame (1) is provided with a cutting assembly (3) located above the support plates (2), and the cutting assembly (3) comprises a support frame (4), a first hydraulic cylinder (5), a cross plate (6) and a plurality of cutters (7). The support frame (4) is fixedly connected to the frame (1), the first hydraulic cylinder (5) is fixedly arranged on the support frame (4), the output end of the first hydraulic cylinder (5) is fixedly connected to the cross plate (6), a plurality of connecting rods (8) are fixedly arranged on the lower end surface of the cross plate (6), and the lower end of the connecting rod (8) is fixedly connected to the cutter (7), and a crushing bin (6) corresponding to the drop gap is fixedly arranged below the support frame (4). 9), a first squeezing roller (10) and a second squeezing roller (11) are rotatably connected in the crushing bin (9), the first squeezing roller (10) and the second squeezing roller (11) are both provided with a plurality of sawtooth protrusions (12), an squeezing gap is provided between the first squeezing roller (10) and the second squeezing roller (11), a second motor (13) is fixedly provided on the outer wall of the crushing bin (9), an output shaft of the second motor (13) is fixedly connected to the first squeezing roller (10), a first gear (14) is fixedly connected to the output shaft of the second motor (13), a second gear (15) meshing with the first gear (14) is rotatably connected to the outer wall of the crushing bin (9), and the second gear (15) is fixedly connected to the second squeezing roller (11); The support frame (4) is provided with a drilling assembly (16), and the drilling assembly (16) comprises a second hydraulic cylinder (17), a positioning plate (18), a central gear (19), a third motor (20), a driving gear (21), four transmission gears (22) and four spiral drill rods (31), the second hydraulic cylinder (17) is fixedly connected to the support frame (4), the output end of the second hydraulic cylinder (17) is fixedly connected to the positioning plate (18), the central gear (19) is respectively connected to the four transmission gears (22), and the output end of the second hydraulic cylinder (17) is fixedly connected to the positioning plate (18). The third motor (20) is meshed with the driving gear (22), the driving gear (21) is meshed with one of the transmission gears (22), the output shaft of the third motor (20) is fixedly connected to the driving gear (21), the central gear (19) and the driving gear (21) are both rotatably connected to the positioning plate (18), the upper end of the auger rod (31) is penetrated by the positioning plate (18) and is fixedly connected to the transmission gear (22), and the auger rod (31) is rotatably connected to the positioning plate (18); The connecting rod (8) in the middle of the transverse plate (6) is set as a main rod (23), and the main rod (23) passes through the central gear (19) and the positioning plate (18), and the main rod (23) is slidably connected to the central gear (19) and the positioning plate (18), and a transverse knife (24) fixed vertically to the cutting knife (7) is fixedly connected below the main rod (23).

2. A concrete crushing device according to claim 1, characterized in that: The frame (1) is fixedly provided with a plurality of limiting inclined plates (25), and the upper end of the crushing bin (9) is fixedly provided with an inclined material guide plate, and the material guide plate corresponds to the extrusion gap.

3. A concrete crushing device according to claim 1, characterized in that: The first squeezing roller (10) and the second squeezing roller (11) are both fixedly provided with a shifting plate (27), and the first squeezing roller (10) and the second squeezing roller (11) are both provided with an annular groove (28) matched with the shifting plate (27).

4. A concrete crushing device according to claim 1, characterized in that: A vibration motor (29) is fixedly mounted on the outer wall of the crushing bin (9).

5. The concrete crushing device according to claim 1, characterized in that: A discharge opening is provided at the lower end of the crushing bin (9), and a material receiving box (30) corresponding to the discharge opening is provided below the crushing bin (9).

6. A method for using the concrete crushing device according to any one of claims 1 to 5, characterized in that: When the concrete crushing device is in use, a concrete slab is placed on the two support plates (2), and an operator causes the first hydraulic cylinder (5) to drive the transverse plate (6) to move downward, so that the cutter (7) cuts the concrete slab into a plurality of pieces, and the cut concrete slab falls into the crushing bin (9). The operator then starts the second motor (13), and the second motor (13) rotates to drive the first gear (14) and the first squeezing roller (10) to rotate, so that the second gear (15) drives the second squeezing roller (11) to rotate, and the first squeezing roller (10) and the second squeezing roller (11) rotate towards each other, and the sawtooth protrusions (12) on the first squeezing roller (10) and the second squeezing roller (11) squeeze and crush the block concrete slab falling into the squeezing gap, and squeeze and crush the block concrete slab into small concrete pieces with smaller particle sizes.

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