A pavement waste asphalt recycling, crushing and combined feeding device
By using heating and softening combined with centrifugal crushing and separation, the problem of separating stones from waste asphalt has been solved, achieving efficient asphalt treatment and equipment protection, and improving road repair efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG BAOLUWEI ENVIRONMENTAL PROTECTION MATERIAL CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, waste asphalt crushing equipment is unable to effectively separate softened asphalt from hard stones, resulting in severe equipment wear and jamming, which affects the stability of equipment operation and maintenance costs.
The process employs a combination of heating and softening, along with centrifugal crushing and separation. Conical plates and railings are installed inside the tank. A heater softens the asphalt, and the high-speed rotation of the railings generates centrifugal force that forces the asphalt through the mesh-like sidewalls, while stones are trapped inside the railings. Heating wires on the inner wall of the tank further process the material.
It achieves efficient separation of asphalt and stones, reduces equipment wear and jamming, improves processing efficiency and equipment reliability, provides easily mixed raw materials, and enhances road repair efficiency.
Smart Images
Figure CN224395355U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road construction equipment technology, and in particular to a device for recycling, crushing and combining waste asphalt for road surfaces. Background Technology
[0002] Asphalt pavement is widely used in various road constructions due to its excellent performance. However, asphalt materials have the characteristic of being soft when heated and hard when cooled, which makes asphalt pavement prone to deformation, cracking, and other damage under long-term use and seasonal changes. During pavement maintenance and repair, it is usually necessary to remove the damaged old asphalt pavement, process the recycled waste asphalt, mix it with new materials, heat and stir it, and then use it for pavement repair to achieve resource reuse.
[0003] However, during the process of removing waste asphalt pavement, a certain amount of stones are often mixed in. Traditional waste asphalt crushing equipment, such as some mechanical crushers, suffers from poor crushing effect when processing waste asphalt containing stones, making it difficult to effectively separate and crush the softened asphalt from the hard stones. Furthermore, due to the high hardness of the stones, the crushing process can easily cause severe wear on key components of the crushing equipment, such as the blades or hammers, potentially leading to equipment jamming, affecting normal operation and lifespan, and increasing maintenance costs and downtime.
[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a road waste asphalt recycling, crushing, and combined feeding device.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a road waste asphalt recycling, crushing, and combined feeding device, comprising a tank, a hopper located at the top of the tank, and a feeding port located at the bottom of the tank, and further comprising:
[0007] A ring gear is rotatably connected to the top surface inside the tank, and a railing is fixedly connected to the bottom of the ring gear;
[0008] A tapered plate is installed on the inner bottom surface of the railing;
[0009] A drive mechanism, mounted on the tank, is used to drive the ring gear to rotate;
[0010] A heater is used to heat the conical plate and the railing.
[0011] Heating wires are embedded in the inner wall of the tank and are used to heat the material inside the tank.
[0012] When using the road waste asphalt recycling, crushing, and combined feeding device of this utility model, construction workers scoop up the recycled asphalt and feed it into the tank through the hopper. After entering the tank, the recycled asphalt falls onto the conical plate inside the tank and abuts against the inner wall of the guardrail. At this time, the heater set inside the conical plate heats the conical plate and the guardrail, causing the recycled asphalt to gradually soften. Simultaneously, the drive mechanism starts, driving the guardrail, which is fixedly connected to the ring gear, to rotate. As the guardrail rotates at high speed, the softened recycled asphalt is thrown against the side wall of the guardrail under the action of centrifugal force. Because the side wall of the guardrail has a grid structure, the softened asphalt with a small particle size can pass through the grid, while hard impurities such as stones mixed in are blocked inside the guardrail, thus realizing the crushing of the asphalt and the separation of it from the stones. The asphalt that passes through the guardrail and some of the small stones that are thrown out are thrown onto the inner wall of the tank. At this point, the heating wires embedded in the inner wall of the tank further heat these materials, keeping the asphalt in a softened state. The asphalt, along with small stones, slides down the smooth inner wall of the tank and is discharged through the feeding port at the bottom of the tank, entering the asphalt mixing equipment for further processing.
[0013] Furthermore, in the road waste asphalt recycling, crushing, and combined feeding device, the guardrail is cylindrical, and the sidewall of the guardrail has a mesh structure.
[0014] More specifically, the drive mechanism includes a drive motor, which is fixedly mounted on the top of the tank. The output shaft of the drive motor extends into the interior of the tank and is fixedly connected to a drive gear, which meshes with the ring gear.
[0015] Preferably, the heater is located inside the conical plate.
[0016] Furthermore, the heater is powered by an electric slip ring, which is used to electrically connect the external power source to the heater. The electric slip ring is fixedly installed at the discharge port of the hopper, and the bottom of the electric slip ring is fixedly connected to the top of the ring gear.
[0017] Preferably, the heating wire is spirally arranged along the inner wall of the tank.
[0018] Furthermore, the inner wall of the tank is smooth.
[0019] In addition, the side walls of the tank are supported by a support frame.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] By incorporating a conical plate and a rotatable frame inside the tank, along with a heater and heating wires, the recycled asphalt is heated and softened. The softened asphalt, under the centrifugal force generated by the high-speed rotation of the frame driven by the drive mechanism, is thrown against the grid-like sidewalls of the frame, thus passing through and being pulverized. Simultaneously, hard impurities such as stones mixed in with the asphalt are separated inside the frame. The pulverized asphalt and separated stones are then thrown onto the inner wall of the tank, where heating wires embedded in the inner wall further heat them, causing them to slide down the smooth inner wall to the bottom feeding port. This technical solution cleverly utilizes the principles of heating and softening combined with centrifugal force pulverization and separation, effectively solving the technical problems of poor waste asphalt pulverization and equipment susceptibility to wear and even jamming caused by stones in existing technologies.
[0022] Compared with traditional mechanical crushing methods, this utility model has a novel structure that can efficiently crush and separate waste asphalt containing stones, reducing equipment wear and jamming, improving the processing efficiency of recycled asphalt and the reliability of the equipment, and also providing easier-to-process raw materials for subsequent asphalt mixing equipment, thereby improving the overall road repair efficiency. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of a road waste asphalt recycling, crushing, and combined feeding device.
[0024] Figure 2 This is a cross-sectional view of a road waste asphalt recycling, crushing, and combined feeding device.
[0025] Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the middle.
[0026] Figure 4 This is a schematic diagram showing the connection between the conical plate and the guardrail of a road waste asphalt recycling, crushing, and combined feeding device.
[0027] In the diagram: 1. Tank body; 2. Hopper; 3. Conical plate; 4. Guardrail; 5. Drive motor; 6. Drive gear; 7. Ring gear; 8. Feed port; 10. Heating wire; 11. Electric slip ring. Detailed Implementation
[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.
[0029] With the acceleration of urbanization and the continuous improvement of road infrastructure, the demand for asphalt pavement paving and maintenance is increasing. Traditional asphalt pavement repair methods usually involve removing the damaged old asphalt pavement and then processing and reusing it as recycled material. However, recycled waste asphalt often contains hard impurities such as stones, which poses a challenge to subsequent recycling processes. Existing waste asphalt processing equipment, especially equipment used for crushing recycled asphalt, is often inefficient when processing materials containing stones, making it difficult to effectively separate asphalt from stones. Furthermore, due to the high hardness of stones, key components of the equipment are prone to severe wear and even jamming, greatly affecting the stability and service life of the equipment and increasing maintenance costs. To address these problems in existing technologies, there is an urgent need for a new device that can efficiently process waste asphalt containing stones and reduce equipment wear and jamming.
[0030] This invention provides a waste asphalt recycling, crushing, and combined feeding device. This device effectively crushes the asphalt and separates it from stones during the processing of recycled asphalt, improving processing efficiency and reducing equipment wear. The device is mainly used in road maintenance and repair sites, receiving shoveled waste asphalt, heating and softening it, crushing and separating it, and then conveying the processed material to asphalt mixing equipment for reuse. Key technical elements of this device include a tank 1 for containing and processing materials, a hopper 2 for feeding, a feeding port 8 for discharging, a ring gear 7 for driving the internal structure, a frame 4 for crushing and separating the material, a conical plate 3 for supporting and initially heating the material, a drive mechanism for driving the ring gear 7, a heater for heating the conical plate 3 and the frame 4, and heating wires 10 for heating the material on the inner wall of the tank 1. These components work together to achieve efficient processing of waste asphalt.
[0031] Specifically, such as Figures 1 to 4 The device shown is a road waste asphalt recycling, crushing, and combined feeding device, including a tank 1, a hopper 2 located at the top of the tank 1, and a feeding port 8 located at the bottom of the tank 1, and further including:
[0032] The ring gear 7 is rotatably connected to the top surface inside the tank 1, and the bottom of the ring gear 7 is fixedly connected to the railing 4;
[0033] Conical plate 3 is set on the inner bottom surface of railing 4;
[0034] A drive mechanism, mounted on the tank body 1, is used to drive the ring gear 7 to rotate;
[0035] A heater is used to heat the conical plate 3 and the railing 4;
[0036] Heating wire 10 is embedded in the inner wall of tank 1 and is used to heat the material inside tank 1.
[0037] Unlike existing technologies that use mechanical crushing to process waste asphalt containing stones, this invention effectively solves the technical problems of existing technologies by combining heating and softening with centrifugal crushing and separation. In existing technologies, hard stones come into direct contact with the mechanical crushing components, leading to severe wear and jamming. In this invention, the waste asphalt is first heated and softened to reduce its hardness. Simultaneously, the centrifugal force generated by the high-speed rotation of the frame 4 allows the softened asphalt to pass through the grid of the frame 4 under centrifugal force, achieving crushing and separation from the stones. Due to their high hardness and large size, the stones have difficulty passing through the grid of the frame 4 and are thus separated inside the frame 4. This processing method avoids the violent collision and friction between hard stones and the high-speed rotating crushing components, significantly reducing equipment wear and the occurrence of jamming. At the same time, the crushed asphalt particles are smaller, with a larger heating area, which is beneficial for subsequent heating and mixing.
[0038] When using the road waste asphalt recycling, crushing, and combined feeding device of this utility model, construction workers scoop up the recycled asphalt and feed it into the tank 1 through the hopper 2. After entering the tank 1, the recycled asphalt falls onto the conical plate 3 inside the tank 1 and abuts against the inner wall of the guardrail 4. At this time, the heater set inside the conical plate 3 heats the conical plate 3 and the guardrail 4, causing the recycled asphalt to gradually soften. Simultaneously, the drive mechanism starts, driving the guardrail 4, which is fixedly connected to the ring gear 7, to rotate. As the guardrail 4 rotates at high speed, the softened recycled asphalt is thrown towards the side wall of the guardrail 4 under the action of centrifugal force. Because the side wall of the guardrail 4 has a grid structure, the softened asphalt with a small particle size can pass through the grid, while hard impurities such as stones mixed in are blocked inside the guardrail 4, thereby realizing the crushing of asphalt and separation from stones. The asphalt that passes through the guardrail 4 and some of the small stones that are thrown out are thrown onto the inner wall of the tank 1. At this point, the heating wire 10 embedded in the inner wall of the tank 1 further heats the materials, keeping the asphalt in a softened state. The asphalt, along with small stones, slides down the smooth inner wall of the tank 1 and is discharged through the feeding port 8 at the bottom of the tank 1, entering the asphalt mixing equipment for further processing. The entire process utilizes the principles of heating and softening combined with centrifugal separation to efficiently and reliably process waste asphalt containing stones, solving a problem in existing technologies.
[0039] As one embodiment of this utility model, the railing 4 is cylindrical, and the side wall of the railing 4 has a grid structure.
[0040] In implementation, the cylindrical design of the grating 4 creates a relatively enclosed space during rotation, accommodating the material fed from the hopper 2 onto the conical plate 3 and ensuring that the material moves towards the sidewall under centrifugal force. The grid-like structure of the grating 4's sidewall is crucial for crushing waste asphalt and separating it from stones. When the heated and softened recycled asphalt is thrown towards the sidewall by the centrifugal force generated by the high-speed rotation of the grating 4, the softened and fluid asphalt can pass through the holes in the grid structure and be ejected from the grating 4. Hard impurities such as stones mixed in with the recycled asphalt, due to their high hardness, resistance to deformation, and generally larger particle size than the grid holes, are blocked inside the grating 4, thus achieving effective separation of asphalt and stones. The size and shape of the grid structure's holes can be designed as needed, for example, using square, circular, or other shapes to optimize the passage of asphalt and the blocking effect on stones.
[0041] As one embodiment of this utility model, the driving mechanism includes a drive motor 5, which is fixedly installed on the top of the tank body 1. The output shaft end of the drive motor 5 extends into the interior of the tank body 1 and is fixedly connected to a drive gear 6. The drive gear 6 meshes with a ring gear 7.
[0042] In practice, power is supplied to the drive motor 5 via an external power supply device, starting the drive motor 5. The output shaft of the drive motor 5 drives the drive gear 6 to rotate, which in turn drives the ring gear 7 to rotate. Since the fence 4 is fixedly connected to the ring gear 7, the fence 4 also rotates at high speed. This gear transmission method has a compact structure, high transmission efficiency, and can reliably transmit the power of the drive motor 5 to the fence 4, enabling it to reach the required speed to generate sufficient centrifugal force.
[0043] In one embodiment of this utility model, the heater is disposed inside the conical plate 3.
[0044] In practice, the heater can be any device capable of generating heat and transferring it to the conical plate 3, such as an electric heating element, heating tube, or heating coil. These heating elements are arranged within the internal space of the conical plate 3 or are tightly bonded to the material of the conical plate 3. When the heater is powered on, the generated heat is first transferred to the material of the conical plate 3, causing the surface temperature of the conical plate 3 to rise. Since the waste asphalt first falls onto the conical plate 3 and comes into contact with its surface, the high temperature of the conical plate 3 can directly and effectively transfer heat to the recycled asphalt, causing the asphalt to soften rapidly.
[0045] In one embodiment of this utility model, the heater is powered by an electric slip ring 11, which is used to electrically connect the external power source to the heater. The electric slip ring 11 is fixedly installed at the discharge port of the hopper 2, and the bottom of the electric slip ring 11 is fixedly connected to the top of the ring gear 7.
[0046] In practice, the electric slip ring 11 solves the technical problem of supplying power to the heater inside the rotating component. Without the electric slip ring, if the heater needs to operate continuously, the traditional fixed wire connection would become entangled or break due to the continuous rotation of the component. By using the electric slip ring 11, a reliable electrical connection between the external static power supply and the internal rotating heater is achieved, ensuring that the heater can continuously and stably obtain power and operate normally during the rotation of the frame 4 and the conical plate 3. The layout of the electric slip ring 11, which is fixedly installed at the discharge port of the hopper 2 and connected to the ring gear 7, is compact and facilitates power transmission. In actual use, a protective cover (not shown in the figure) can be designed at the discharge port of the hopper 2 to protect the electric slip ring 11.
[0047] In one embodiment of this utility model, the heating wire 10 is spirally arranged along the inner wall of the tank 1.
[0048] In practice, the heating wire 10 is powered by an external power supply. The heating wire 10 is a resistance wire or heating element that converts electrical energy into heat energy. It is spirally arranged along the inner wall of the tank 1 to achieve uniform heating of the inner wall. When the frame 4 rotates at high speed, the crushed asphalt and separated stones are thrown towards the inner wall of the tank 1 under centrifugal force. Heating the inner wall with the heating wire 10 further heats these attached or slid-off materials, maintaining the asphalt in a softened state and reducing the friction between the material and the inner wall. The spiral arrangement ensures that most of the inner wall receives heat, avoiding localized overheating or underheating, thus allowing the material thrown onto the inner wall to be heated uniformly.
[0049] As one embodiment of this utility model, the inner wall of the tank 1 is smooth.
[0050] In practice, by designing the inner wall of tank 1 as a smooth surface, this invention further optimizes the discharge process of the processed material. The smooth inner wall, combined with the heat provided by the embedded heating wire 10, acts on the material thrown onto the inner wall, allowing the material to quickly and thoroughly slide down to the feeding port 8. This not only improves the material discharge efficiency and ensures the continuous and stable operation of the device, but also reduces material residue inside tank 1, lowering the difficulty of cleaning and maintenance. Therefore, the smoothing treatment of the inner wall of tank 1 makes a positive technical contribution to improving the overall processing efficiency and reliability of the device.
[0051] In one embodiment of this utility model, the side wall of the tank 1 is supported by a support frame.
[0052] In implementation, by setting up a support frame to support the side wall of tank 1, this invention ensures that the entire device maintains structural stability during the receiving, processing, and discharging of waste asphalt. Especially when the high-speed rotation of the guardrail 4 generates centrifugal force, the support frame effectively withstands the resulting lateral force, preventing tank 1 from shaking or shifting. This stable support structure is the foundation for the normal operation of the device, contributing to improved operational reliability and service life.
[0053] Working principle of this utility model:
[0054] When using the road waste asphalt recycling, crushing, and combined feeding device of this utility model, construction workers scoop up the recycled asphalt and feed it into the tank 1 through the hopper 2. After entering the tank 1, the recycled asphalt falls onto the conical plate 3 inside the tank 1 and abuts against the inner wall of the guardrail 4. At this time, the heater set inside the conical plate 3 heats the conical plate 3 and the guardrail 4, causing the recycled asphalt to gradually soften. Simultaneously, the drive mechanism starts, driving the guardrail 4, which is fixedly connected to the ring gear 7, to rotate. As the guardrail 4 rotates at high speed, the softened recycled asphalt is thrown towards the side wall of the guardrail 4 under the action of centrifugal force. Because the side wall of the guardrail 4 has a grid structure, the softened asphalt with a small particle size can pass through the grid, while hard impurities such as stones mixed in are blocked inside the guardrail 4, thereby realizing the crushing of asphalt and separation from stones. The asphalt that passes through the guardrail 4 and some of the small stones that are thrown out are thrown onto the inner wall of the tank 1. At this time, the heating wire 10 embedded in the inner wall of the tank 1 further heats these materials, keeping the asphalt in a softened state, and it slides down the smooth inner wall of the tank 1 along with the small stones, and is discharged through the feeding port 8 at the bottom of the tank 1, and enters the asphalt mixing equipment for further processing.
[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.
Claims
1. A road waste asphalt recycling, crushing, and combined feeding device, comprising a tank (1), a hopper (2) disposed at the top of the tank (1), and a feeding port (8) disposed at the bottom of the tank (1), characterized in that, Also includes: A ring gear (7) is rotatably connected to the inner top surface of the tank body (1), and a railing (4) is fixedly connected to the bottom of the ring gear (7); A conical plate (3) is provided on the inner bottom surface of the railing (4); A drive mechanism is provided on the tank body (1) for driving the ring gear (7) to rotate; A heater is used to heat the conical plate (3) and the railing (4); A heating wire (10) is embedded in the inner wall of the tank (1) and is used to heat the material inside the tank (1).
2. The road waste asphalt recycling, crushing, and combined feeding device according to claim 1, characterized in that, The railing (4) is cylindrical, and the sidewalls of the railing (4) are mesh structures.
3. The road waste asphalt recycling, crushing, and combined feeding device according to claim 2, characterized in that, The driving mechanism includes a drive motor (5), which is fixedly installed on the top of the tank (1). The output shaft end of the drive motor (5) extends into the interior of the tank (1) and is fixedly connected to a drive gear (6). The drive gear (6) meshes with the ring gear (7).
4. The road waste asphalt recycling, crushing, and combined feeding device according to claim 1, characterized in that, The heater is located inside the conical plate (3).
5. The road waste asphalt recycling, crushing, and combined feeding device according to claim 4, characterized in that, The heater is powered by an electric slip ring (11), which is used to electrically connect the external power source to the heater. The electric slip ring (11) is fixedly installed at the discharge port of the hopper (2), and the bottom of the electric slip ring (11) is fixedly connected to the top of the ring gear (7).
6. The road waste asphalt recycling, crushing, and combined feeding device according to claim 1, characterized in that, The heating wire (10) is spirally arranged along the inner wall of the tank (1).
7. The road waste asphalt recycling, crushing, and combined feeding device according to claim 1, characterized in that, The inner wall of the tank (1) is smooth.
8. The road waste asphalt recycling, crushing, and combined feeding device according to claim 1, characterized in that, The sidewalls of the tank (1) are supported by a support frame.