Crushing and mixing device for asphalt waste cold recycling

Abstract

The utility model relates to the technical field of asphalt cold recycling, in particular to a crushing and mixing device for asphalt waste cold recycling, which comprises a rack, a crushing device is arranged on the rack, the crushing device comprises an inner hopper, a plurality of crushing wheels are rotatably arranged in the inner hopper, a spray pipe is arranged in the inner hopper and positioned below the crushing wheels, a spray head is arranged on the spray pipe, and the spray head is connected with the inner hopper. One end of the spraying head is communicated with the spraying pipe, and the other end of the spraying head directly faces the crushing wheel; the number of the crushing wheels is three, the three crushing wheels are arranged in a triangular mode, a gap is reserved between every two adjacent crushing wheels, and the spraying head right faces the gap between every two adjacent crushing wheels. The spray head is used for spraying the mixed liquid to the gap between the two crushing wheels, so that dust can be reduced, the mixing sufficiency between the material and the mixed liquid can be improved, and the use stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt cold regeneration, in particular to a crushing and mixing device for cold regeneration of waste asphalt. Background Art

[0002] Asphalt cold recycling is to use the existing old road materials, add some new aggregates according to the design requirements, and then add a certain amount of regeneration agents and additives in proportion to complete the continuous operation process of spraying emulsified asphalt and water, milling and mixing the old road, lifting, paving and rolling the recycled materials at natural ambient temperature. Therefore, asphalt cold recycling mainly includes the cleaning, transportation and storage, crushing and screening, adding new materials, mixing and homogenization, and finally the pavement paving. In the crushing step of the asphalt cold regeneration process, some regeneration agents and additives are usually needed to improve the performance of the recycled asphalt. These additives help to improve the quality of the recycled asphalt, enhance its performance, and make it suitable for reuse in road construction. However, when the material is in the cold recycling hopper, it is pressed down by the gravity of the upper material, and the lower material is easy to accumulate and arch, resulting in blockage. The additives and regeneration agents cannot be fully mixed with the material, which affects the continuity and uniformity of the mixture.

[0003] In order to solve the above technical problems, Chinese patent CN203767348U discloses a cold material arch breaking device, including a rotating shaft, which is installed in the inner cavity of the cold recovery hopper through bearings at both ends; a plurality of arch breaking arms are arranged in the axial direction of the rotating shaft, and the rotating shaft is connected to a driving device capable of driving it to rotate. The above patent stirs the cold recycling material to break the arch by a plurality of arch breaking arms installed on the rotating shaft, so that the discharge is continuous and uniform. The lengths of the plurality of arch breaking arms vary, which can increase the stirring range and make the stirring more sufficient. However, the arch breaking arms of this patent can only stir the material, and the material is still in a pile when the additives and regeneration agents are added, which leads to insufficient mixing. At the same time, too many arch breaking arms cause dust to be raised, and the working environment is poor.

[0004] Therefore, it is necessary for technical personnel in this field to provide a crushing and mixing device for cold regeneration of asphalt waste to improve the uniformity of the regeneration agent and additives when mixing with the material during the homogenization process, reduce the generation of dust, and ensure the quality of the regenerated material. Utility Model Content

[0005] The utility model aims to provide a crushing and mixing device for cold regeneration of asphalt waste, so as to solve the technical problems in the prior art that dust is easily raised during the cold crushing process of asphalt waste and the mixing is insufficient after crushing.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a crushing and mixing device for cold regeneration of asphalt waste, including a frame, on which a crushing device is provided, the crushing device including an inner hopper, a plurality of crushing wheels rotatably provided in the inner hopper, a spray pipe is provided in the inner hopper below the crushing wheel, a spray head is provided on the spray pipe, one end of the spray head is connected to the spray pipe, and the other end of the spray head is facing the crushing wheel; there are three crushing wheels, which are arranged in a triangle, with a gap between two adjacent crushing wheels, and the spray head is facing the gap between the two crushing wheels.

[0007] Furthermore, the inner hopper is in a trumpet shape, and a blocking block is provided at the upper end of the inner hopper. The blocking block is in a square block structure, and the blocking block is fixedly connected to the upper opening surface of the inner hopper along the axis direction of the crushing wheel.

[0008] Further, the three crushing wheels are located between the two blocking blocks.

[0009] Furthermore, a plurality of protrusions are evenly arranged on the surface of the crushing wheel, and the protrusions on the surfaces of two adjacent crushing wheels are staggered with each other.

[0010] Furthermore, the spray pipe is filled with a mixed liquid.

[0011] Furthermore, the regeneration agent is foamed asphalt.

[0012] Furthermore, the frame is provided with an external hopper, the crushing device is installed in the external hopper, and the frame is also provided with a conveying device, which is located below the crushing device.

[0013] Furthermore, the conveying device includes a conveying belt and a conveying motor, and the conveying motor drives the conveying belt.

[0014] Furthermore, the frame is also provided with a feed discharge port, which is located below the end of the conveyor belt.

[0015] The beneficial effect of the utility model is that the utility model utilizes a spray head to spray the mixed liquid to the gap between the two crushing wheels, which can not only reduce the generation of dust, but also improve the adequacy of mixing between the material and the mixed liquid, thereby ensuring the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of a crushing and mixing device for cold regeneration of asphalt waste according to the utility model.

[0017] Figure 2 It is a top view of the crushing and mixing device for cold regeneration of asphalt waste according to the utility model.

[0018] Figure 3 yes Figure 2 Sectional view along AA.

[0019] Figure 4 yes Figure 2 Cross-sectional view along BB.

[0020] The components in the accompanying drawings are marked as follows: 10, frame; 11, conveying device; 12, external hopper; 15, discharge port; 20, crushing device; 21, internal hopper; 22, crushing wheel; 23, spray pipe; 24, spray head; 25, blocking block; 26, protrusion. DETAILED DESCRIPTION

[0021] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0022] See also Figure 1 , Figure 3 The utility model provides a crushing and mixing device for cold regeneration of asphalt waste, including a frame 10, on which a crushing device 20 is arranged; when in use, materials are added into the crushing device 20 to achieve rapid crushing and recycling of the materials.

[0023] Furthermore, the crushing device 20 includes an inner hopper 21, in which a plurality of crushing wheels 22 are rotatably provided, a spray pipe 23 is provided in the inner hopper 21 below the crushing wheel 22, a spray head 24 is provided on the spray pipe 23, one end of the spray head 24 is connected to the spray pipe 23, and the other end of the spray head 24 faces the crushing wheel 22.

[0024] Specifically, three crushing wheels 22 are provided, and the three crushing wheels 22 are arranged in a triangle, with a gap between two adjacent crushing wheels 22 , and the spray head 24 faces the gap between the two crushing wheels 22 .

[0025] The spray pipe 23 is filled with a mixed liquid, which is composed of a regeneration agent, an additive and water. The regeneration agent includes but is not limited to emulsified asphalt, foamed asphalt, etc., and the additive includes a modified polymer, a reinforcing agent and modified asphalt, etc.

[0026] When in use, the material is added into the inner hopper 21, and the three crushing wheels 22 are used to crush the material. The material falls from the gap between the two crushing wheels 22, and the spray head 24 is used to spray the mixed liquid into the gap, which can not only reduce the generation of dust, but also improve the mixing between the material and the mixed liquid, thereby ensuring the stability of use.

[0027] In this embodiment, the crushing wheel 22 is rotatably arranged on the inner hopper 21 by means of a bearing, one end of the crushing wheel 22 penetrates the wall of the inner hopper 21 and extends outward, a motor (not shown) is provided on the frame 10, and the part of the crushing wheel 22 located outside the inner hopper 21 is installed on the motor, and the crushing wheel 22 is driven to rotate by the motor, thereby ensuring stability in use.

[0028] The spray pipe 23 is externally connected to a pressure pump (not shown in the figure), and the mixed liquid is injected into the spray pipe 23 through the pressure pump, so as to achieve stable spraying and mixing of the mixed material and the material.

[0029] Furthermore, the inner hopper 21 is in a bell-mouth shape, and a blocking block 25 is provided at the upper end of the inner hopper 21. The blocking block 25 is in a square block structure, and the blocking block 25 is fixedly connected to the upper opening surface of the inner hopper 21 along the axis direction of the crushing wheel 22. The three crushing wheels 22 are located between two blocking blocks 25, thereby ensuring the stability and convenience of material discharge.

[0030] Furthermore, a plurality of protrusions 26 are evenly arranged on the surface of the crushing wheel 22, and the protrusions 26 on the surfaces of two adjacent crushing wheels 22 are staggered with each other, thereby ensuring the uniformity and stability of material crushing and improving the use effect of the utility model.

[0031] For further information, see Figure 2 , Figure 4 The frame 10 is provided with an external hopper 12, the crushing device 20 is installed in the external hopper 12, the frame 10 is also provided with a conveying device 11, the conveying device 11 is located below the crushing device 20, the conveying device 11 includes a conveyor belt and a conveying motor, the conveying motor drives the conveyor belt, and then realizes the transmission of materials. The frame 10 is also provided with a discharge port 15, the discharge port 15 is located below the end of the conveyor belt, and realizes the discharge and collection of the materials.

[0032] The specific operation method of the utility model is: adding the material into the inner hopper 21, driving the three crushing wheels 22 to crush the material, the material falls from the gap between the two crushing wheels 22, starting the pressure pump, and the spray head 24 sprays the mixed liquid into the gap to complete the mixing.

[0033] The utility model utilizes the spray head 24 to spray the mixed liquid to the gap between the two crushing wheels 22, which can reduce the generation of dust and improve the adequacy of mixing between the material and the mixed liquid, thereby ensuring the stability of use.

[0034] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A crushing and mixing device for cold regeneration of asphalt waste, comprising a frame (10), on which a crushing device (20) is provided, characterized in that: The crushing device (20) comprises an inner hopper (21), wherein a plurality of crushing wheels (22) are rotatably arranged in the inner hopper (21), a spray pipe (23) is arranged in the inner hopper (21) below the crushing wheel (22), a spray head (24) is arranged on the spray pipe (23), one end of the spray head (24) is connected to the spray pipe (23), and the other end of the spray head (24) faces the crushing wheel (22); three crushing wheels (22) are arranged in a triangle, a gap is left between two adjacent crushing wheels (22), and the spray head (24) faces the gap between the two crushing wheels (22).

2. The crushing and mixing device for cold regeneration of asphalt waste according to claim 1, characterized in that: The inner hopper (21) is in a bell-mouth shape. A blocking block (25) is provided at the upper end of the inner hopper (21). The blocking block (25) is in a square block structure. The blocking block (25) is fixedly connected to the upper opening surface of the inner hopper (21) along the axis direction of the crushing wheel (22).

3. The crushing and mixing device for cold regeneration of asphalt waste according to claim 2, characterized in that: The three crushing wheels (22) are located between the two blocking blocks (25).

4. The crushing and mixing device for cold regeneration of asphalt waste according to claim 2, characterized in that: The surface of the crushing wheel (22) is evenly provided with a plurality of protrusions (26), and the protrusions (26) on the surfaces of two adjacent crushing wheels (22) are arranged in an interlaced manner.

5. The crushing and mixing device for cold regeneration of asphalt waste according to claim 1, characterized in that: The spray pipe (23) is filled with a mixed liquid.

6. The crushing and mixing device for cold regeneration of asphalt waste according to claim 1, characterized in that: The frame (10) is provided with an external hopper (12), the crushing device (20) is installed in the external hopper (12), and the frame (10) is also provided with a conveying device (11), which is located below the crushing device (20).

7. The crushing and mixing device for cold regeneration of asphalt waste according to claim 6, characterized in that: The conveying device (11) comprises a conveying belt and a conveying motor, and the conveying motor drives the conveying belt.

8. The crushing and mixing device for cold regeneration of asphalt waste according to claim 7, characterized in that: The frame (10) is also provided with a material discharge port (15), and the material discharge port (15) is located below the end of the conveyor belt.

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