An asphalt recycling device
By designing an asphalt recycling device that combines heating and centrifugal rotation, and utilizing through holes or channels in the inner and outer layers to separate asphalt from aggregates, the problems of high recycling costs and complex operation in existing technologies are solved, achieving efficient and high-quality asphalt recycling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN HIGHWAY & BRIDGE ENG MONITORING STATION CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies for recycling aged asphalt suffer from problems such as high solvent residue, high recycling costs, and high operational barriers, especially in the field or in laboratories with limited resources, where it is difficult to efficiently recover trace amounts of asphalt.
An asphalt recycling device was designed, comprising a body, a recycling container, and a control device. It achieves the separation of asphalt and aggregate by combining heating and centrifugal rotation, and utilizing through holes or channels in the inner and outer layers. The structure of the inner and outer layers is optimized to improve the asphalt recycling rate.
It achieves efficient and high-quality asphalt recycling, reduces recycling costs and operational complexity, and is suitable for performance testing of trace amounts of asphalt in field or laboratory settings with limited resources.
Smart Images
Figure CN224280944U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt recycling technology, and in particular to an asphalt recycling device. Background Technology
[0002] With over 5 million kilometers of highways in my country, the rapid recovery of asphalt from old asphalt mixtures can provide a reference for analyzing the causes of asphalt pavement distress and provide a basis for mixture proportion design, asphalt pavement maintenance, and recycling. Therefore, efficient and high-quality asphalt recovery plays a crucial role in highway construction. Currently, the recovery of aged asphalt generally uses the Abson method or rotary evaporation apparatus method. The Abson method yields asphalt with significant solvent residue, while the rotary evaporation apparatus method is prone to causing secondary aging of the recovered asphalt. Furthermore, both the Abson method and the rotary evaporation apparatus method require specialized distillation equipment, resulting in high costs and operational barriers. This is particularly challenging in field settings or laboratories with limited resources for recovering trace amounts of asphalt for performance testing. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an asphalt recycling device that reduces the cost and operational threshold of asphalt recycling and improves the asphalt recycling rate.
[0004] To solve the above-mentioned technical problems, this utility model provides an asphalt recycling device, including a body, a recycling container, and a control device; the body is provided with a receiving cavity, the recycling container is detachably disposed in the receiving cavity, and the control device is disposed at the bottom of the body and is used to heat the recycling container and / or drive the recycling container to rotate; the recycling container includes an inner layer and an outer layer that can rotate relative to each other, the inner layer is provided with through holes or channels, and a collection area for carrying asphalt is formed between the inner layer and the outer layer.
[0005] As an improvement to the above solution, both the inner layer and the outer layer are cylindrical, the inner layer is detachably disposed inside the outer layer, and the height of the outer layer is greater than or equal to the height of the inner layer.
[0006] As an improvement to the above solution, the through holes or channels are evenly spaced along the sidewall of the inner layer in the circumferential direction; on the same horizontal plane, the included angle between two adjacent through holes or channels in the circumferential direction is 45° to 90°.
[0007] As an improvement to the above solution, the inner layer has at least two through holes or channels along its axial direction.
[0008] As an improvement to the above solution, the diameter of the through hole is 0.04mm to 0.08mm.
[0009] As an improvement to the above solution, the channel is an elongated hole, and the length direction of the channel is consistent with the axial direction. The length of the channel is 0.06mm to 0.12mm, and the width is 0.04mm to 0.08mm.
[0010] As an improvement to the above solution, the opening size of the through hole or channel on the side away from the outer layer is smaller than the opening size of the through hole or channel on the side closer to the outer layer.
[0011] As an improvement to the above scheme, the ratio of the inner layer height to the outer layer height is 1:(1~1.25); the ratio of the inner layer diameter to the outer layer diameter is 1:(1.2~1.6);
[0012] The height of the inner layer is 6cm to 10cm, and the diameter of the inner layer is 8cm to 10cm.
[0013] As an improvement to the above solution, the bottom through hole or channel has a preset distance from the bottom of the inner layer, and the ratio of the preset distance to the height of the inner layer is 1:(5~10).
[0014] Along the axial direction of the inner layer, the top through hole or channel is at a predetermined distance from the bottom of the inner layer, and the ratio of the predetermined distance to the height of the inner layer is 1:(2-4).
[0015] As an improvement to the above solution, the control device includes a heating component and a centrifugal component; the heating component is located at the bottom and / or side wall of the receiving cavity, and the centrifugal component includes a centrifugal generator and a rotating shaft, one end of the rotating shaft being connected to the centrifugal generator and the other end being connected to the recovery container.
[0016] Implementing this utility model has the following beneficial effects:
[0017] The asphalt recovery device provided by this utility model heats and / or drives the recovery container to rotate through a control device. By combining heating and centrifugal rotation, asphalt is separated from the asphalt binder. The asphalt enters the collection zone through the through holes on the inner layer. Aggregates with larger particle size and density remain in the inner layer. The asphalt in the collection zone is taken out, and the solvent evaporates naturally, achieving efficient and high-quality recovery of asphalt. It is especially suitable for recovering trace amounts of asphalt for performance testing in on-site or laboratory settings with limited conditions. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the asphalt recycling device provided by this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the recycling container provided by this utility model;
[0020] Figure 3 This is a top cross-sectional view of a recycling container provided in an embodiment of the present invention;
[0021] Figure 4 This is a side cross-sectional view of a recycling container provided in an embodiment of the present invention;
[0022] Figure 5 This is a side cross-sectional view of a recycling container provided in another embodiment of the present invention;
[0023] Figure 6 This is a side cross-sectional view of a recycling container provided in another embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.
[0025] like Figure 1 and Figure 2 As shown, this utility model embodiment provides an asphalt recycling device, including a body 1, a recycling container 2, and a control device; the body 1 is provided with a receiving cavity 11, the recycling container 2 is disposed in the receiving cavity 11, and the control device is disposed at the bottom of the body 1 and is used to heat the recycling container 2 and / or drive the recycling container 2 to rotate; the recycling container 2 includes an inner layer 21 and an outer layer 22 that can rotate relative to each other, the inner layer 21 is provided with through holes or channels, and a collection area 24 for carrying asphalt is formed between the inner layer 21 and the outer layer 22.
[0026] The asphalt recycling device of this utility model has an inner layer 21 that carries crushed asphalt concrete particles. By heating and rotating the inner layer 21, the asphalt and aggregate in the asphalt concrete particles are separated. The aggregate has a larger density and particle size and remains in the inner layer 21. After the asphalt is heated and softened, it enters the collection area 24 through the through holes or channels under centrifugal action.
[0027] like Figure 2 As shown, in a preferred embodiment, both the inner layer 21 and the outer layer 22 are cylindrical. The inner layer 21 is detachably disposed within the outer layer 22, and the height of the outer layer 22 is greater than or equal to the height of the inner layer 21. After the asphalt and aggregate are initially separated, the inner layer 21 is removed, and solvents such as petroleum ether are added to the outer layer 22 to further dissolve the asphalt. This, combined with subsequent sieving, improves the asphalt recovery rate.
[0028] In one implementation, such as Figure 4As shown, the inner layer 21 is provided with through holes 23a. The diameter of the through holes 23a is 0.04mm to 0.08mm, exemplarily 0.045mm, 0.05mm, 0.055mm, 0.06mm or 0.07mm, but not limited to these. If the diameter of the through holes 23a is too small, it is not conducive to the ejection of asphalt, and may even cause blockage of the through holes 23a; if the diameter of the through holes 23a is too large, the separated coarse aggregate may be ejected with the asphalt, resulting in poor asphalt separation effect.
[0029] In another implementation, such as Figure 5 As shown, the inner layer 21 is provided with a channel 23b, which is an elongated hole. The length direction of the channel 23b is consistent with the axial direction. The length of the channel 23b is 0.06mm to 0.12mm, exemplarily 0.07mm, 0.08mm, 0.09mm, 0.01mm, or 0.11mm, but not limited thereto. The width is 0.04mm to 0.08mm, exemplarily 0.045mm, 0.05mm, 0.055mm, 0.06mm, or 0.07mm, but not limited thereto. The length direction of the channel 23b can increase the flow coverage of the softened asphalt, thereby improving the efficiency of asphalt entering the collection area 24. Specifically, the cross-sectional shape of the channel 23b can be elliptical, waist-shaped, etc., but not limited thereto. Compared with the rectangular cross-sectional shape with sharp equilateral corners, the elliptical and waist-shaped cross-sectional shapes with smooth equilateral corners can reduce the adhesion of asphalt at the corners and improve the flow performance of the asphalt.
[0030] In another embodiment, the opening size of the through hole 23a or channel 23b on the side away from the outer layer 22 is smaller than the opening size of the through hole 23a or channel 23b on the side closer to the outer layer 22. Specifically, the size of the opening can be defined by the diameter of the circular through hole, the length and / or width of the elongated through hole. Figure 6 As shown, the opening of the through hole 23a on the side away from the outer layer 22 is smaller than the opening of the through hole 23a on the side closer to the outer layer 22. Specifically, the diameter of the opening of the through hole 23a on the side away from the outer layer 22 is...
[0031] The diameter of the opening of the through hole 23a near the outer layer 22 is 0.06mm to 0.1mm, ranging from 0.04mm to 0.08mm. A smaller opening reduces the flow resistance of the asphalt, while a larger opening near the outer layer reduces turbulence and prevents splashing, making it particularly suitable for high-speed ejection scenarios. It is understood that the channel 23b can also be configured with a similar shape, i.e., the opening away from the outer layer is smaller than the opening near the outer layer.
[0032] In a preferred embodiment, such as Figure 3As shown, the through holes 23a or channels are evenly spaced along the sidewall of the inner layer 21 in the circumferential direction; on the same horizontal plane, the included angle α between two adjacent through holes 23a or channels in the circumferential direction is 45° to 90°. The evenly spaced through holes or channels can ensure that the separated asphalt is fully thrown out into the collection area 24.
[0033] To further improve the asphalt collection effect, at least two through holes 23a or channels 23b are provided on the sidewall of the inner layer 21 along the axial direction.
[0034] In one embodiment, the ratio of the height of the inner layer 21 to the height of the outer layer 22 is 1:(1 to 1.25), such as 1:14, 1:16, 1:18, 1:2 or 1:22, but not limited thereto, to avoid asphalt splashing out after the inner layer asphalt concrete particles are heated and separated.
[0035] In one embodiment, the ratio of the diameter of the inner layer 21 to the diameter of the outer layer 22 is 1:(1.2 to 1.6), exemplarily 1:35, 1:4, 1:45, 1:5 or 1:55, but not limited thereto, to provide sufficient volume to hold the softened and separated asphalt.
[0036] Specifically, the height of the inner layer 21 is 6cm to 10cm, and the diameter of the inner layer 21 is 8cm to 10cm.
[0037] To facilitate asphalt ejection and prevent aggregate from clogging the through holes 23a or channels 23b, the bottom through holes 23a or channels 23b are at a predetermined distance from the bottom of the inner layer 21 along the axial direction of the inner layer. The ratio of the predetermined distance to the height of the inner layer 21 is 1:(5 to 10), such as 1:5.5, 1:6, 1:7, 1:8 or 1:9, but not limited to these.
[0038] Along the axial direction of the inner layer, the top through-hole 23a or channel 23b has a preset distance from the top of the inner layer 21. The ratio of the preset distance to the height of the inner layer is 1:(2-4), exemplarily 1:2.2, 1:2.5, 1:3, 1:3.2, or 1:3.8, but not limited thereto. The asphalt recycling device provided by this utility model achieves efficient asphalt ejection by setting the size and position of the through-hole 23a or channel 23b. The asphalt is ejected to the sidewall of the outer layer 22. It is not necessary to set small-diameter and densely distributed through-holes on the entire sidewall of the inner layer. Only a few through-holes are needed to achieve efficient asphalt ejection, reducing the complexity of the recycling device.
[0039] The control device includes a heating assembly and a centrifugal assembly; the heating assembly is located at the bottom and / or side wall of the receiving cavity 11, and the centrifugal assembly includes a centrifugal generator and a rotating shaft, one end of which is connected to the centrifugal generator and the other end of which is connected to the recovery container 2. It is understood that the heating assembly and centrifugal assembly use conventional heating and centrifugal assemblies in the art to achieve heating and centrifugal rotation, respectively.
[0040] Preferably, the inner layer 21 and / or the outer layer 22 can be made of materials such as stainless steel or polytetrafluoroethylene. Existing asphalt recovery devices usually use glassware such as glass flasks for distillation. The inner wall of the glass will have serious asphalt adhesion. Therefore, it is necessary to increase the amount of asphalt concrete particles to recover the amount of asphalt required for subsequent tests. Compared with glass, stainless steel or polytetrafluoroethylene have low adhesion. The open cup-shaped recovery container 2 is also easy to pour out asphalt, thus improving the asphalt recovery rate.
[0041] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. An asphalt recycling device, characterized in that, The device includes a body, a recycling container, and a control device. The body has a receiving cavity, and the recycling container is detachably disposed in the receiving cavity. The control device is disposed at the bottom of the body and is used to heat the recycling container and / or drive the recycling container to rotate. The recycling container includes an inner layer and an outer layer that can rotate relative to each other. The inner layer has through holes or channels, and a collection area for carrying asphalt is formed between the inner layer and the outer layer.
2. The asphalt recycling device as described in claim 1, characterized in that, Both the inner layer and the outer layer are cylindrical, the inner layer is detachably disposed inside the outer layer, and the height of the outer layer is greater than or equal to the height of the inner layer.
3. The asphalt recycling device as described in claim 1, characterized in that, The through holes or channels are evenly spaced along the sidewall of the inner layer in the circumferential direction; on the same horizontal plane, the included angle between two adjacent through holes or channels in the circumferential direction is 45° to 90°.
4. The asphalt recycling device as described in claim 1, characterized in that, Along the axial direction of the inner layer, the sidewall of the inner layer is provided with at least two through holes or channels.
5. The asphalt recycling device as described in claim 1, characterized in that, The diameter of the through hole is 0.04mm to 0.08mm.
6. The asphalt recycling device as described in claim 1, characterized in that, The channel is an elongated hole, and the length direction of the channel is consistent with the axial direction; the length of the channel is 0.06mm to 0.12mm, and the width is 0.04mm to 0.08mm.
7. The asphalt recycling device as described in claim 1, characterized in that, The opening size of the through hole or channel on the side away from the outer layer is smaller than the opening size of the through hole or channel on the side closer to the outer layer.
8. The asphalt recycling device as described in claim 7, characterized in that, The ratio of the inner layer height to the outer layer height is 1:(1~1.25); the ratio of the inner layer diameter to the outer layer diameter is 1:(1.2~1.6); The height of the inner layer is 6cm to 10cm, and the diameter of the inner layer is 8cm to 10cm.
9. The asphalt recycling device as described in claim 4, characterized in that, Along the axial direction of the inner layer, the bottom through hole or channel is at a predetermined distance from the bottom of the inner layer, and the ratio of the predetermined distance to the height of the inner layer is 1:(5~10). Along the axial direction of the inner layer, the top through hole or channel is at a predetermined distance from the bottom of the inner layer, and the ratio of the predetermined distance to the height of the inner layer is 1:(2-4).
10. The asphalt recycling device as described in claim 1, characterized in that, The control device includes a heating component and a centrifugal component; the heating component is located at the bottom and / or side wall of the receiving cavity, and the centrifugal component includes a centrifugal generator and a rotating shaft, one end of which is connected to the centrifugal generator and the other end of which is connected to the recovery container.