Scratching and stripping structure, equipment and method for RAP material surface treatment

Abstract

According to the scratching and stripping structure, device and method for RAP material surface treatment, the scratching steel brush is used for scratching the stone surface in the RAP material, and an asphalt film is effectively stripped; when encountering stones with larger size or stronger impact force during working, the stones can directly impact the movable plate instead of the rigid structure, the impact force can drive the movable plate to stably move towards the fixed bottom plate along a guide groove formed by the guide piece, and the elastic mechanism between the movable plate and the fixed bottom plate is synchronously extruded to generate elastic deformation; instantaneous rigid impact of stones on the device is converted into buffering energy absorption of an elastic mechanism, and most impact energy is absorbed and dissipated through elastic deformation, so that counter-acting force acting on the stones is greatly buffered and weakened, the stones are prevented from being broken or cracked due to impact, and the service life of the device is prolonged. The physical integrity and original gradation of the stones are guaranteed to the maximum extent, and a solid foundation is laid for subsequent high-value recycling.

Description

Technical Field

[0001] This invention belongs to the field of recycled asphalt pavement production and processing technology, specifically relating to a scratching and peeling structure, equipment and method for RAP material surface treatment. Background Technology

[0002] RAP refers to recycled asphalt mixture, which is an important material for resource recycling in road engineering. During use, old asphalt pavement is recycled through milling, recycling and other methods to obtain waste asphalt mixture. This waste asphalt mixture contains old asphalt and aggregates such as crushed stone and sand, as well as possible residual additives. After recycling, it can be reused in asphalt pavement construction, which reduces costs and environmental burden, and is one of the core means of sustainable infrastructure construction.

[0003] RAP (Rich Acid Polymer) contains a large amount of aggregate, and its surface is covered with a large amount of asphalt film. Therefore, when processing RAP, it is necessary to perform a stripping process to remove the asphalt film from the surface of the aggregate. Current technologies often use crushing and kneading methods to remove the asphalt film from the surface of the aggregate during the stripping process.

[0004] However, the crushing and kneading method not only often causes the stone to break, but also has the problem of incomplete removal of the asphalt film on the stone surface. This results in the stone after the stripping treatment being severely broken and not meeting the usage requirements, while also reducing the overall recycling rate of RAP material. Summary of the Invention

[0005] To address the problem in the prior art that the crushing and kneading method often results in stone breakage and incomplete removal of the asphalt film from the stone surface, leading to severely broken stone that does not meet usage requirements and reducing the overall recovery rate of RAP material, this invention provides a gripping and peeling structure, equipment, and method for RAP material surface treatment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a gripping and peeling structure for surface treatment of RAP materials, comprising:

[0008] A fixed base plate is used to be installed on the peeling linkage of the peeling equipment;

[0009] A guide component is fixedly installed on the edge of the fixed base plate to form a guide groove;

[0010] The movable plate is movably disposed in the guide groove and has multiple through holes;

[0011] Multiple sets of scratching steel brushes, one set of scratching steel brushes passes through one of the through holes, and one end is fixedly mounted on the fixed base plate, while the other end extends out of the movable plate;

[0012] An elastic mechanism is disposed between the movable plate and the fixed base plate;

[0013] In use, the scratching steel brush is used to scratch the surface of the stones in the RAP material to peel off the asphalt film. When the stones in the RAP material hit the movable plate, the movable plate moves along the guide groove toward the fixed base plate, and the compression elastic mechanism undergoes elastic deformation.

[0014] Optionally, the guide member includes a plurality of guide plates, which are disposed along the edge of the fixed base plate to form the guide groove;

[0015] Each of the guide plates has a limit protrusion on its opposite side.

[0016] Optionally, the elastic mechanism includes a plurality of springs, one of which is sleeved on the portion of the set of gripping steel brushes located between the fixed base plate and the movable plate.

[0017] Optionally, each set of the scraping steel brushes is made of 5 to 7 manganese steel wires with a diameter of 2 mm to 3 mm.

[0018] Optionally, the portion of the steel scrubber extending beyond the movable plate has a flower-shaped structure; the length of the flower-shaped structure is 20mm to 25mm.

[0019] Optionally, the thickness of the movable plate is 8mm to 10mm; the thickness of the fixed base plate is 2mm.

[0020] In a second aspect, the present invention provides an apparatus for surface treatment of RAP material, comprising a tank, a drive unit, a peeling link, and a plurality of peeling structures for RAP material treatment as described above.

[0021] The stripping linkage is disposed in the tank body;

[0022] The driving component is mounted on the tank body and connected to the stripping linkage;

[0023] The peeling structure is disposed on the peeling link.

[0024] Thirdly, the present invention provides a method for surface treatment of RAP materials, implemented based on the above-described apparatus for surface treatment of RAP materials, comprising:

[0025] Start the drive unit to make it rotate the peeling linkage inside the tank;

[0026] Pour the RAP material to be processed into the tank;

[0027] Using the peeling structure on the peeling link, the asphalt film on the surface of the stones in the RAP material is peeled off by the gripping steel brush, causing it to fall off the stone surface; when the stones in the RAP material collide with the movable plate of the peeling structure, the movable plate moves along the guide groove toward the fixed base plate, and the compression elastic mechanism undergoes elastic deformation to prevent the stones from further breaking.

[0028] The beneficial effects of this invention are:

[0029] This invention provides a gripping and peeling structure for RAP material surface treatment. Through the coordinated operation of a fixed base plate, guide members, a movable plate, multiple sets of gripping steel brushes, and an elastic mechanism, a dynamic and flexible peeling structure is creatively provided. When the peeling equipment is working, the gripping steel brushes grip the surface of the stones in the RAP material, effectively peeling off the asphalt film. When encountering large or impact-forced stones, the stones directly impact the movable plate instead of the rigid structure. The impact force drives the movable plate to move smoothly towards the fixed base plate along the guide groove formed by the guide members. This movement simultaneously compresses the elastic mechanism located between the two, causing it to undergo elastic deformation. This transforms the instantaneous rigid impact of the stone on the device into energy absorption by the elastic mechanism. Most of the impact energy is absorbed and dissipated through elastic deformation, thus greatly buffering and weakening the reaction force acting on the stone, preventing the stone from cracking or developing fissures due to impact. This maximizes the physical integrity and original gradation of the stone, laying a solid foundation for subsequent high-value recycling. In addition, the entire telescopic movement process will generate high-frequency micro-vibrations. These vibrations can effectively shake off the asphalt and dust adhering to the gripping steel brush during operation, realizing the self-cleaning function in continuous operation, avoiding the problem of reduced peeling efficiency caused by asphalt accumulation, and ensuring the continuous and stable high-performance output of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the scratching and peeling structure used for RAP material surface treatment in this invention;

[0031] Figure 2 This is a schematic diagram of the guide component in the gripping and peeling structure used for RAP material surface treatment in this invention.

[0032] The components include: 1. Fixed base plate; 2. Guide component; 21. Guide groove; 22. Guide plate; 23. Limiting protrusion; 3. Movable plate; 4. Gripping steel brush; 5. Elastic mechanism. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0036] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0038] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] See Figures 1 to 2 The diagram shows a scratching and peeling structure for RAP material surface treatment provided in this invention, comprising:

[0042] Fixed base plate 1, used for mounting on the peeling linkage of the peeling equipment;

[0043] Guide component 2 is fixedly installed on the edge of the fixed base plate 1 to form guide groove 21;

[0044] The movable plate 3 is movably disposed in the guide groove 21 and has multiple through holes;

[0045] Multiple sets of scratching steel brushes 4, one set of scratching steel brushes 4 passes through a through hole, and one end is fixedly installed on the fixed base plate 1, and the other end extends out of the movable plate 3;

[0046] The elastic mechanism 5 is disposed between the movable plate 3 and the fixed base plate 1;

[0047] In use, the scratching steel brush 4 scratches the surface of the stones in the RAP material to peel off the asphalt film. When the stones in the RAP material hit the movable plate 3, the movable plate 3 moves along the guide groove 21 toward the fixed base plate 1, and the compression elastic mechanism 5 undergoes elastic deformation.

[0048] In this embodiment, by setting up a fixed base plate 1, guide member 2, movable plate 3, multiple sets of gripping steel brushes 4, and elastic mechanism 5 in synergy, a dynamic response and flexible peeling structure for RAP material surface treatment is creatively provided. When the peeling equipment is working, the gripping steel brushes 4 grip the surface of the stones in the RAP material, effectively peeling off the asphalt film. When encountering stones that are large in size or have strong impact force during operation, the stones will directly impact the movable plate 3 instead of the rigid structure. The impact force will drive the movable plate 3 to move smoothly towards the fixed base plate 1 along the guide groove 21 formed by the guide member 2. During this movement, the elastic mechanism 5 located between the two is simultaneously squeezed, causing it to undergo elastic deformation. The instantaneous rigid impact of the stone on the device is transformed into the buffer energy absorption of the elastic mechanism. Most of the impact energy is absorbed and dissipated through elastic deformation, thereby greatly buffering and weakening the reaction force acting on the stone, avoiding the stone from cracking or developing cracks due to impact, and maximizing the physical integrity and original gradation of the stone, laying a solid foundation for subsequent high-value recycling. In addition, the entire telescopic movement process will generate high-frequency micro-vibrations. These vibrations can effectively shake off the asphalt and dust adhering to the gripping steel brush 4 during operation, realizing the self-cleaning function in continuous operation, avoiding the problem of reduced peeling efficiency caused by asphalt accumulation, and ensuring the continuous and stable high-performance output of the device.

[0049] Optionally, the guide member 2 in this invention includes a plurality of guide plates 22, which are disposed on the edge of the fixed base plate 1 to form a guide groove 21; a limit protrusion 23 is provided on the opposite side of each guide plate 22.

[0050] In this embodiment, multiple guide plates 22 are arranged along the edge of the fixed base plate 1 to form a guide groove 21, and each guide plate 22 is equipped with a limiting protrusion 23. The guide groove 21 formed by the guide plates 22 provides highly stable and precise linear guidance for the movement of the movable plate 3, ensuring that the movable plate 3 will not tilt, jam, or rotate when subjected to uneven or lateral force impacts, and will always perform smooth telescopic movement along the predetermined direction. This ensures the uniformity of force on the elastic mechanism 5, making the buffering process more linear and reliable, thereby transmitting and dissipating the impact force more effectively and consistently, and further improving the effect of protecting the integrity of the aggregate. The setting of the limiting protrusion defines the limit position of the movement of the movable plate 3, that is, the maximum telescopic stroke, preventing the movable plate 3 from moving excessively under abnormally large impact forces and possibly colliding hard with the fixed base plate, avoiding all the negative effects of rigid collisions. On the other hand, it also effectively prevents the elastic mechanism 5 from being over-compressed and possibly plastic deformation or failure, ensuring the durability and reliability of the elastic buffering function, ensuring the stability and durability of the entire stripping structure in the long-term operation under harsh working environments, and reducing maintenance requirements.

[0051] Optionally, the elastic mechanism 5 in this invention includes multiple springs, with one spring sleeved on the portion of a set of gripping steel brushes 4 located between the fixed base plate 1 and the movable plate 3.

[0052] Optionally, each set of scratching steel brushes 4 in this invention is made of 5 to 7 manganese steel wires with a diameter of 2 mm to 3 mm.

[0053] In this embodiment, manganese steel, as a high-strength, high-wear-resistant, and relatively tough alloy material, is used to make scraping steel brushes that can withstand the harsh working environment of continuous friction and impact with hard stone materials. This results in an extremely long service life, significantly reducing maintenance costs and time associated with frequent brush replacements due to rapid bristle wear, thus ensuring production continuity. Setting the number of scraping steel brushes 4 within a reasonable range achieves an optimal balance between scraping density and flexibility. A sufficient number of brushes ensures ample scraping points within a unit area, enabling effective scraping and combing, and improving the efficiency and thoroughness of asphalt film removal. Simultaneously, a moderate number of brushes avoids an overly rigid overall brush cluster, retaining a certain degree of flexibility, allowing individual steel wires within the brush cluster to undergo slight independent deformation when encountering resistance, better adapting to the microscopic contours of the stone surface. The diameter of the manganese steel wire, set at 2mm to 3mm, directly affects the rigidity, elasticity, and wear resistance of the steel brush. If the diameter is too small, the brush will bend or wear out prematurely; if the diameter is too large, it will be too rigid, lacking necessary flexibility and potentially scratching the stone surface. Manganese steel wire within this diameter range possesses ideal comprehensive mechanical properties, ensuring effective gripping force while providing cushioning through its own slight bending during aggregate impact. It also exhibits excellent wear resistance, making it a key material basis for achieving efficient, gentle, and durable stripping operations.

[0054] Optionally, the portion of the steel scraper brush 4 extending out of the movable plate 3 in this invention has a flower-shaped structure; the length of the flower-shaped structure is 20mm to 25mm.

[0055] In this embodiment, the portion of the scraping steel brush 4 extending beyond the movable plate 3 is designed as a flower-shaped structure with a limited length. The flower-shaped structure refers to the fact that the multiple manganese steel wires at the end of the steel brush are no longer tightly bound together, but rather spread out radially or dispersedly, forming a multi-forked scraping head with a larger specific surface area. This structure greatly increases the actual contact points and contact area between the steel brush and the surface of the stone asphalt film, allowing a single scraping action to cover a wider area and generate a denser scraping force, thereby significantly improving the efficiency and thoroughness of peeling off the asphalt film. The dispersed filamentous structure can more easily penetrate and grip the asphalt film, prying and tearing it off from the stone surface. The specific length range ensures that the flower-shaped portion has sufficient freedom and flexibility. Within the length range, the flower-shaped filamentous portion is long enough to generate effective elastic deformation to adapt to the uneven surface, ensuring contact with the asphalt film in the pits, but not too long, resulting in insufficient rigidity and easy permanent bending or entanglement. During operation, the tips of these flowering filaments generate very high-frequency vibrations and shaking when impacted and scratched. This micro-motion effect greatly helps to prevent viscous asphalt from accumulating at the base of the steel brush, effectively shaking off the adhering material and keeping the brush head clean and capable of continuous operation.

[0056] Optionally, the thickness of the movable plate 3 in this invention is 8mm to 10mm; the thickness of the fixed base plate 1 is 2mm.

[0057] In this embodiment, the movable plate 3, as the core component that directly bears the impact of the stone and transmits the load, has a thickness range that ensures it possesses sufficient mass, rigidity, and structural strength. Within this thickness range, the movable plate 3 can withstand continuous impact loads without plastic deformation, fracture, or excessive bending, ensuring its stability and durability as a pressure transmission platform. It also avoids the overall structure from becoming too bulky, which could affect the dynamic response speed. The fixed base plate 1, as the mounting base of the entire structure, has a relatively thin design. While ensuring sufficient connection strength and support rigidity, its main focus is on reducing the weight of the entire device, lowering the load on the drive equipment, and helping to control material costs.

[0058] Example 2

[0059] Secondly, the present invention can also provide an apparatus for surface treatment of RAP material, including a tank, a drive unit, a peeling link and a plurality of gripping and peeling structures for surface treatment of RAP material as described in Embodiment 1.

[0060] The stripping linkage is installed inside the tank;

[0061] The drive unit is mounted on the tank and connected to the stripping linkage;

[0062] The peeling structure is mounted on the peeling link.

[0063] In this embodiment, the device includes a tank, a drive unit, a peeling link, and multiple peeling structures. These peeling structures are mounted on the rotating peeling link, forming a dense and efficient flexible gripping working surface within the tank, greatly improving processing capacity and peeling efficiency. The drive unit moves these peeling structures within the tank via the peeling link, utilizing the peeling structures to peel the asphalt from the RAP material. It should be noted that the peeling structure in this embodiment is completely identical to the peeling structure in Embodiment 1, and its beneficial effects are also identical, so further details are omitted here.

[0064] Example 3

[0065] Thirdly, the present invention can also provide a method for treating RAP surface materials, implemented based on the apparatus for RAP surface treatment in Embodiment 2, comprising:

[0066] Start the drive unit to make it rotate the peeling linkage inside the tank;

[0067] Pour the RAP material to be processed into the tank;

[0068] Using the peeling structure on the peeling link, the asphalt film on the surface of the stone in the RAP material is peeled off by the scratching steel brush 4, so that it falls off the stone surface; when the stone in the RAP material collides with the movable plate 3 of the peeling structure, the movable plate 3 moves along the guide groove 21 toward the fixed base plate, and the compression elastic mechanism 5 undergoes elastic deformation to prevent the stone from being further broken.

[0069] In this embodiment, a drive unit rotates a stripping linkage equipped with a stripping structure within the tank. The linkage's gripping steel brushes then scrape and peel the RAP material. Utilizing a "flexible contact, dynamic buffering" working principle, this method does not rely on massive impact crushing force. Instead, it removes the asphalt film through the scraping and combing action of the gripping steel brushes—a gentler and more precise approach. When encountering stone impact, the inherent dynamic response mechanism of the method—the "moving plate movement-compression elastic mechanism"—is activated. This proactive retreat and buffering dissipates destructive energy, elevating the process from a potentially secondary, "violent" separation to a "refined" stripping process that preserves the value of the raw materials as much as possible. By implementing this method, high-performance recycled aggregates can be stably produced, maximizing the preservation of the physical and geometric properties of the virgin aggregates. This provides a new, high-quality, high-volume utilization pathway for asphalt pavement recycling technology, and is of great significance for promoting a circular economy and sustainable development.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A gripping and peeling structure for surface treatment of RAP materials, characterized in that, include: A fixed base plate (1) is used to be installed on the peeling linkage of the peeling equipment; The guide member (2) is fixedly disposed on the edge of the fixed base plate (1) to form a guide groove (21); The movable plate (3) is movably disposed in the guide groove (21) and has multiple through holes; Multiple sets of scratching steel brushes (4), one set of scratching steel brushes (4) passes through one of the through holes, and one end is fixedly installed on the fixed base plate (1), and the other end extends out of the movable plate (3); An elastic mechanism (5) is disposed between the movable plate (3) and the fixed base plate (1); In use, the scratching steel brush (4) scratches the surface of the stone in the RAP material to peel off the asphalt film. When the stone in the RAP material hits the movable plate (3), the movable plate (3) moves along the guide groove (21) to the fixed base plate (1), and the compression elastic mechanism (5) undergoes elastic deformation.

2. The gripping and peeling structure for RAP material surface treatment according to claim 1, characterized in that, The guide member (2) includes a plurality of guide plates (22), which are disposed on the edge of the fixed base plate (1) to form the guide groove (21); Each of the guide plates (22) has a limiting protrusion (23) on its opposite side.

3. The gripping and peeling structure for RAP material surface treatment according to claim 1, characterized in that, The elastic mechanism (5) includes a plurality of springs, one of which is sleeved on the portion of a set of gripping steel brushes (4) located between the fixed base plate (1) and the movable plate (3).

4. The gripping and peeling structure for RAP material surface treatment according to claim 1, characterized in that, Each of the aforementioned scratching steel brushes (4) is made of 5 to 7 manganese steel wires with a diameter of 2 to 3 mm.

5. The gripping and peeling structure for RAP material surface treatment according to claim 1, characterized in that, The portion of the steel scrubbing brush extending out of the movable plate (3) is a flower-shaped structure; the length of the flower-shaped structure is 20mm to 25mm.

6. The gripping and peeling structure for RAP material surface treatment according to claim 1, characterized in that, The thickness of the movable plate (3) is 8mm to 10mm; the thickness of the fixed base plate (1) is 2mm.

7. An apparatus for surface treatment of RAP materials, characterized in that, Includes a tank, a drive unit, a peeling link, and a plurality of gripping and peeling structures for RAP material processing as described in claims 1 to 6; The stripping linkage is disposed in the tank body; The driving component is mounted on the tank body and connected to the stripping linkage; The gripping and peeling structure is mounted on the peeling link.

8. A method for surface treatment of RAP material, implemented based on the apparatus for surface treatment of RAP material as described in claim 7, characterized in that, include: Start the drive unit to make it rotate the peeling linkage inside the tank; Pour the RAP material to be processed into the tank; Using the peeling structure on the peeling link, the asphalt film on the surface of the stone in the RAP material is peeled off by the scratching steel brush (4), so that it falls off the stone surface; when the stone in the RAP material collides with the movable plate (3) of the scratching peeling structure, the movable plate (3) moves along the guide groove (21) toward the fixed base plate (1), and the elastic mechanism (5) undergoes elastic deformation to prevent the stone from being further broken.

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