A device for recycling asphalt in waste asphalt mixture

Abstract

The utility model relates to technical fields, specific field is a kind of asphalt recovery device in waste asphalt mixture, to solve the technical problem that the heating, stirring, screening is carried out in different equipment of prior art, production procedure is not continuous, production efficiency is not high, it includes: stirring drum, heating cylinder, support no.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to an asphalt recycling device for waste asphalt mixtures. Background Technology

[0002] Asphalt is an important building material, but its production consumes large amounts of resources such as petroleum. Recycling and reusing asphalt from waste asphalt mixtures can reduce the demand for fresh asphalt, thereby conserving resources and reducing pressure on resource extraction. If waste asphalt mixtures are not recycled and are directly landfilled or discarded, they will occupy a large amount of land resources, and the harmful substances in them may pollute soil and water bodies. Recycling helps reduce landfill volume, mitigate environmental pollution, and aligns with the concept of green and environmentally friendly development.

[0003] Existing technology uses an external heat source to heat waste asphalt mixtures (RAP), softening the aged asphalt and reducing its adhesion to aggregates. Once the mixture reaches a specified temperature, it is fed into a mixing device, or directly mixed within the heating device. The mixing device applies mechanical forces to the mixture through the rotation of the mixing blades, subjecting it to shearing, compression, and tumbling. Under these mechanical forces, the interface between the softened asphalt and aggregates is disrupted, causing the asphalt to peel off from the aggregate surface, resulting in asphalt-aggregate separation. Finally, the asphalt is separated by a vibrating screen. The heating, mixing, and screening processes are carried out in different devices, making the production process discontinuous and inefficient. Utility Model Content

[0004] In order to solve the technical problem that the heating, stirring and screening are carried out in different equipment in the existing technology, resulting in discontinuous production processes and low production efficiency, this utility model provides an asphalt recycling device in waste asphalt mixture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an asphalt recovery device for waste asphalt mixtures, comprising: a mixing drum, the mixing drum being horizontally arranged, the mixing drum being rotatably connected to a heating drum, the heating drum being provided with a heating element, the heating drum being connected to a support frame one, a gear ring being connected to the mixing drum, the gear ring being meshed with a power output gear, the mixing drum being connected to a separation drum, the separation drum having a slit with a slit width smaller than the aggregate particle size, the separation drum being connected to a slag discharge drum, the slag discharge drum being rotatably connected to a support frame two, a stirring shaft being rotatably connected to the end side wall of the heating drum, the end side wall of the heating drum being connected to a material injection pipe, a fragmented spiral blade being connected to the stirring shaft inside the mixing drum, the stirring shaft being rotatably connected to the separation shaft through a sealing bushing, an extrusion spiral blade being connected to the separation shaft inside the separation drum and the slag discharge drum, the pitch of the extrusion spiral blade gradually decreasing along the conveying direction of the fragmented spiral blade, and the separation shaft being rotatably connected to a support frame three.

[0006] Preferably, the heating cylinder includes a cylinder body, which is rotatably connected to the outside of the stirring cylinder. The inner circumference of the cylinder body is provided with elongated holes, and heating elements are connected in the elongated holes. The axis of the heating elements is arranged parallel to the axis of the cylinder body.

[0007] Preferably, the outside of the cylinder is connected to an insulation layer.

[0008] Preferably, both the separator and the slag discharge cylinder are connected to a sealed material guide cover.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. After the mixture is injected into the mixing drum, the heating drum transfers heat to the mixing drum. The segmented spiral blades tumble and mix, melting the asphalt while conveying the mixture. The mixing drum and the segmented spiral blades rotate synchronously, making the mixture circumferentially tumble and mix more evenly, while also heating more evenly. After tumbling, the asphalt no longer adheres to the surface of the aggregate. The extrusion spiral blades of the separation drum, with their gradually decreasing pitch, squeeze the asphalt out of the slit. The aggregate is discharged through the slag discharge drum, completing the separation. In this way, heating, mixing, and separation are carried out in the same equipment, making the production process continuous and greatly improving production efficiency.

[0011] 2. The heating element is easy to install and remove, and can be quickly replaced even if damaged. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0014] In the diagram: 1. Stirring cylinder; 2. Heating cylinder; 21. Cylinder body; 22. Heating element; 23. Insulation layer; 3. Support 1; 4. Toothed ring; 5. Separating cylinder; 6. Slag discharge cylinder; 7. Support 2; 8. Stirring shaft; 9. Feeding pipe; 10. Fragmented spiral blade; 11. Sealing bushing; 12. Separating shaft; 13. Extrusion spiral blade; 14. Support 3. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] The rotary connection described in this device refers to the axial fixation of the bearing by mounting the bearing on the shaft, with a spring retaining ring groove provided on the shaft or shaft hole, and the rotation achieved by locking the elastic retaining ring in the retaining ring groove; the hinge connection refers to the connection method that allows movement through connecting parts such as hinges, pins, and short shafts.

[0017] The present invention will now be described in detail with reference to the accompanying drawings.

[0018] The following is in conjunction with the appendix Figure 1-2 This embodiment describes an asphalt recycling device for waste asphalt mixtures, comprising: a mixing drum 1, which is horizontally positioned and rotatably connected to a heating drum 2, which contains a heating element and is connected to a support 3; a geared ring 4 connected to the mixing drum 1, which meshes with a power output gear; the mixing drum 1 is connected to a separation drum 5, which has a slit with a width smaller than the aggregate particle size; and the separation drum 5 is connected to a slag discharge drum 6, which is rotatably connected to... The heating cylinder 2 is connected to the support 7. The end side wall of the heating cylinder 2 is rotatably connected to the stirring shaft 8. The end side wall of the heating cylinder 2 is connected to the injection pipe 9. The stirring shaft 8 in the stirring cylinder 1 is connected to the fragmented spiral blade 10. The stirring shaft 8 is rotatably connected to the separation shaft 12 through the sealing bushing 11. The separation shaft 12 inside the separation cylinder 5 and the slag discharge cylinder 6 is connected to the extrusion spiral blade 13. The pitch of the extrusion spiral blade 13 gradually decreases along the conveying direction of the fragmented spiral blade 10. The separation shaft 12 is rotatably connected to the support 3 14.

[0019] After the mixture is injected into the mixing drum 1 through the injection pipe 9, the gear ring 4, mixing shaft 8, and separating shaft 12 are activated. The heating cylinder 2 transfers heat from the heating element to the mixing drum 1. The mixing shaft 8 drives the segmented spiral blades 10 to tumble and mix, melting the asphalt while conveying the mixture. The mixing drum 1 and the segmented spiral blades 10 rotate synchronously. The frictional force of the mixing drum 1 on the mixture is less than the thrust of the segmented spiral blades 10, allowing the mixture to be conveyed forward while being subjected to circumferential force for more uniform mixing. The rotating mixing drum 1 ensures that the heat from the heating cylinder 2 is evenly distributed, preventing uneven mixing at the bottom. The lower temperature at the top and higher temperature at the bottom ensures more uniform heating of the raw materials. After mixing, the asphalt no longer adheres to the surface of the aggregate and enters the separator 5. The separator shaft 12 drives the extrusion spiral blades 13 with gradually decreasing pitch to rotate, causing the asphalt to be extruded from the separator 5 through the slit. The aggregate is discharged through the slag discharge cylinder 6, completing the separation. The stirring shaft 8 rotates faster than the separator shaft 12, resulting in better mixing and preventing insufficient material in the separator 5 from being compressed and unable to be extruded. In this way, heating, mixing, and separation are carried out in the same equipment, making the production process continuous and greatly improving production efficiency.

[0020] The heating cylinder 2 includes a cylinder body 21, which is rotatably connected to the outside of the stirring cylinder 1. The inner circumference of the cylinder body 21 is evenly distributed with elongated holes, and heating elements 22 are connected in the elongated holes. The axis of the heating element 22 is arranged parallel to the axis of the cylinder body 21.

[0021] The heating element 22 is easy to install and remove, and can be quickly replaced even if damaged.

[0022] The outer surface of the cylinder 21 is connected to an insulation layer 23.

[0023] To prevent burns to outsiders while also preventing heat loss.

[0024] Both the separator 5 and the slag discharge cylinder 6 are externally connected to sealed material guide covers.

[0025] The sealed material guide covers direct the asphalt and aggregate out of the discharge routes, and also prevent the leakage of harmful gases from affecting personnel health.

[0026] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recovering asphalt from waste asphalt mixtures, characterized in that: include: A stirring drum (1) is horizontally positioned and rotatably connected to a heating drum (2). The heating drum (2) contains a heating element and is connected to a support (3). A geared ring (4) is connected to the stirring drum (1), and the geared ring (4) meshes with the output gear of the power unit. The stirring drum (1) is connected to a separation drum (5). A slit is provided on the separation drum (5), the width of which is smaller than the aggregate particle size. The separation drum (5) is connected to a slag discharge drum (6), which is rotatably connected to a support (7). The heating drum (2) A stirring shaft (8) is rotatably connected to the end side wall. The end side wall of the heating cylinder (2) is connected to the injection pipe (9). A fragmented spiral blade (10) is connected to the stirring shaft (8) inside the stirring cylinder (1). The stirring shaft (8) is rotatably connected to the separation shaft (12) through the sealing bushing (11). An extrusion spiral blade (13) is connected to the separation shaft (12) inside the separation cylinder (5) and the slag discharge cylinder (6). The pitch of the extrusion spiral blade (13) gradually decreases along the conveying direction of the fragmented spiral blade (10). The separation shaft (12) is rotatably connected to the support three (14).

2. The asphalt recovery device in waste asphalt mixture according to claim 1, characterized in that: The heating cylinder (2) includes a cylinder body (21), which is rotatably connected to the outside of the stirring cylinder (1). The inner circumference of the cylinder body (21) is evenly distributed with elongated holes, and heating elements (22) are connected in the elongated holes. The axis of the heating element (22) is parallel to the axis of the cylinder body (21).

3. The asphalt recovery device in waste asphalt mixture according to claim 2, characterized in that: The outer surface of the cylinder (21) is connected to an insulation layer (23).

4. The asphalt recovery device in waste asphalt mixture according to claim 1, characterized in that: Both the separator (5) and the slag discharge cylinder (6) are connected to a sealed material guide cover.

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