Intelligent multi-stage excitation asphalt pavement old material oil-stone separation device

Abstract

The invention relates to an intelligent multi-stage excitation asphalt pavement old material oil-stone separation device, and belongs to the technical field of highway engineering. The device comprises a fixed base, a grinding rod starting, stopping and regulating device, a grinding rod heating regulating device, a separation bin starting, stopping and regulating device and a temperature controller, a multi-stage rotary separation bin is mounted on the fixed base; the interior of the multi-stage rotary separation bin is divided into a first-stage separation bin, a second-stage separation bin, a third-stage separation bin and a fourth-stage separation bin from top to bottom through three sieve plates with sieve holes; according to the invention, high-efficiency, high-valued, refined and environment-friendly recycling of the old asphalt pavement material is realized, and the purpose of turning the old asphalt pavement material from waste into treasure is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of highway engineering, and in particular relates to an intelligent multi-stage excitation asphalt pavement old material oil stone separation device. Background Art

[0002] At present, a considerable number of asphalt pavements in China are facing large-scale maintenance and repair or even reconstruction. It is estimated that my country's ordinary national and provincial trunk highway major and medium-sized repair projects alone can generate 160 million tons of old asphalt pavement materials each year, while the recycling rate of road pavement materials in my country is less than 30%. According to incomplete statistics, Yunnan Province's expressways produce more than 2 million tons of waste asphalt pavement materials each year. Due to extensive accumulation and no special classification management, the source and composition of asphalt pavement waste materials are extremely complex, which seriously affects their recycling. Therefore, the stacking and comprehensive disposal of recycled asphalt pavement materials have gradually become a technical problem that needs to be solved in the field of road engineering.

[0003] In view of the recycling and utilization of old asphalt pavement materials, a series of research and practice work has been carried out at home and abroad on the oil-stone separation process and equipment of old asphalt pavement materials, providing uniform and high-quality raw materials for recycled asphalt mixtures, thereby ensuring the engineering quality of recycled mixtures. At present, there are two main methods for separating asphalt and aggregate from old asphalt pavement materials: chemical oil-stone separation technology and physical and mechanical oil-stone separation technology.

[0004] Chemical oil-stone separation technology uses organic solvents to separate asphalt from recycled materials to form a mixed solution. Aged asphalt can be recovered through a series of steps such as centrifugal precipitation and rotary evaporation, and aggregates with low (almost no) asphalt residue can be recycled. This method has a very obvious effect on the stripping of asphalt and aggregate in recycled materials, but it also has its obvious defects: first, this method is time-consuming, the oil-stone separation efficiency is low, and there is a certain degree of environmental pollution; second, there is a certain amount of mineral powder in the asphalt obtained by this method, which will have a great adverse effect on the subsequent evaluation and use of asphalt; third, this method is costly and requires more large-scale process equipment; fourth, this method almost completely peels off the asphalt on the aggregate, resulting in the almost complete destruction of the asphalt film structure originally attached to the aggregate, the loss of adhesion between the aggregates, and the increase in the amount of asphalt used in the aggregate reuse process, which is not conducive to the recycling of aggregates.

[0005] Physical mechanical stripping and oil-stone separation technology mainly uses mechanical equipment such as crushers to separate oil from old asphalt pavement materials. After the impact, shearing, and grinding of the crusher, part of the asphalt will be stripped from the aggregate surface, and the aggregate will also be processed to a certain extent. Finally, the material particle size meets the requirements and can be discharged from the crusher. According to the different external forces applied by the crusher to the material, the crusher machinery commonly used in engineering projects is currently divided into impact crushing machinery (including hammer crusher and impact crusher) and compression crushing machinery (including jaw crusher, cone crusher and roller crusher). In the book "Technical Recommendations for Highways" (TRH 21: 2009), the importance of crushing, processing and storage of old asphalt pavement materials is particularly emphasized. The current "Technical Specifications for Highway Asphalt Pavement Regeneration" (JTG F41-2019) in my country also provides detailed instructions on the milling recovery, crushing, screening and classified storage of old asphalt pavement materials. However, the traditional crusher has a defect that cannot be ignored. Its crushing method is rigid crushing, that is, in the crushing process, it usually relies mainly on pressure (or extrusion force) to crush the coarse aggregate. This crushing method will cause two more serious problems: one is to refine the aggregate grading, and the other is that it may lead to the deterioration of the mechanical properties of the aggregate, which seriously damages the performance of the aggregate in the old asphalt pavement material and restricts the recycling of the old asphalt pavement material.

[0006] At present, there are some problems in the recycling of old asphalt pavement materials. First, the oil-stone separation effect of old asphalt pavement materials is not obvious, especially the screening of fine materials is extremely difficult, and it is easy to block the material, resulting in unstable gradation of the screening material; conventional methods are not satisfactory for the separation of old asphalt pavement materials, and may even seriously damage the properties of the original aggregate. Second, the recycling of old asphalt pavement materials is not efficient, and most of its recycling methods are still limited to low-value utilization technology, while the fine separation of old asphalt pavement materials is crucial for its efficient recycling application. There is a clear lack of targeted application technology for each grade of finely separated materials in different functional layers of the road or the reuse technology of other industries. This is ultimately due to the poor effect of the oil-stone separation technology of old asphalt pavement materials.

[0007] Therefore, how to overcome the shortcomings of the existing technology is an urgent problem to be solved in the field of highway engineering technology. Summary of the invention

[0008] The purpose of the present invention is to solve the deficiencies of the prior art and to provide an intelligent multi-stage excitation asphalt pavement old material oil stone separation device.

[0009] To achieve the above purpose, the technical solution adopted by the present invention is as follows: Intelligent multi-stage excitation asphalt pavement old material oil stone separation device, including a fixed base, grinding rod start and stop and regulator, grinding rod heating regulator and separation chamber start and stop and regulator; A multi-stage rotating separation chamber is installed on the fixed base; The multi-stage rotating separation chamber includes a level I separation chamber, a level II separation chamber, a level III separation chamber, and a level IV separation chamber which are coaxially arranged from top to bottom; the level I separation chamber, the level II separation chamber, the level III separation chamber, and the level IV separation chamber can all rotate independently; The bottoms of the first-level separation bin, the second-level separation bin, the third-level separation bin, and the fourth-level separation bin are all sieve plates with sieve holes, and the diameters of the sieve holes of the four separation bins are arranged in descending order; The lower part of one side of the first-level separation bin, the second-level separation bin, the third-level separation bin, and the fourth-level separation bin is connected to a discharge device through a control discharge valve; The discharging ends of the four discharging devices are arranged above the automatic material collecting conveying device; A screened material discharge port is installed on the side wall of the multi-stage rotary separation bin and below the IV-stage separation bin; A grinding rod bearing platform is installed in the lower part of each of the level I separation chamber, the level II separation chamber, the level III separation chamber, and the level IV separation chamber; A plurality of branch-shaped grinding rods are installed on the grinding rod carrying platform; The grinding rod start-stop and regulator is connected to the dendrite-shaped grinding rod, and is used to control the start and stop of the dendrite-shaped grinding rod, and control the speed and rotation direction of the dendrite-shaped grinding rod; The dendrite-shaped grinding rod has a built-in heating resistance wire; the grinding rod heating controller is connected to the dendrite-shaped grinding rod and is used to turn on and off the heating function of the dendrite-shaped grinding rod; The separation bin start-stop and controller are respectively connected to the level I separation bin, level II separation bin, level III separation bin, and level IV separation bin to control the start and stop, rotation speed, rotation direction, and vibration frequency of the level I separation bin, level II separation bin, level III separation bin, and level IV separation bin; For the level I separation bin, level II separation bin, level III separation bin, and level IV separation bin, the rotation direction of the four separation bins is opposite to the rotation direction of the dendritic grinding rods arranged therein; It also includes an AI intelligent aggregate oil film controller and an overload torque cutter. The AI ​​intelligent aggregate oil film controller is used to monitor whether the discharge of the automatic aggregate conveyor meets the requirements of the corresponding level. If not, an alarm will be issued. The overload torque cut-off device is connected to the grinding rod start-stop and regulator to monitor the torsion of the dendrite grinding rod; when the torsion of the dendrite grinding rod exceeds the set value, the rotation function of the grinding rod is cut off.

[0010] Furthermore, preferably, it also includes a grinding rod spacing regulator; the grinding rod spacing regulator is connected to the grinding rod supporting platform, and the grinding rod spacing regulator is used to regulate the row spacing and column spacing of the tree-like grinding rod installation positions of the grinding rod supporting platform, so as to achieve the purpose of regulating the grinding rod spacing.

[0011] Furthermore, preferably, the bottoms of the level I separation bin, level II separation bin, level III separation bin, and level IV separation bin are all sieve plates with sieve holes, and the apertures of the sieve holes are 30 mm, 20 mm, 10 mm, and 5 mm, respectively.

[0012] Furthermore, preferably, a temperature controller is also included, and temperature sensors are provided in the level I separation chamber, level II separation chamber, level III separation chamber, and level IV separation chamber; the temperature controller is respectively connected to the grinding rod heating controller and the temperature sensor; and is used to control the heating temperature of the grinding rod heating controller according to the temperature detected by the temperature sensor, thereby controlling the temperature in the level I separation chamber, level II separation chamber, level III separation chamber, and level IV separation chamber.

[0013] Further, preferably, the branch-shaped grinding rod comprises a trunk and branches connected to the trunk; the branches are stirring blades; and the surfaces of the stirring blades are evenly provided with file teeth.

[0014] Further, preferably, it also includes a start-stop controller and an emergency stop button; The start-stop controller is connected to the external power supply system and is used to control the start and stop of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device when the intelligent multi-stage excitation asphalt pavement old material oil stone separation device is powered on; The emergency stop button is used to stop the operation of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device in an emergency and put it in a power-off state.

[0015] The purpose of the present invention is to solve the engineering and technical problems of recycling old asphalt pavement materials. An intelligent multi-stage excitation device for fine oil-stone separation of old asphalt pavement materials is innovatively proposed. The device uses intensive filing, rotation separation, and multi-stage excitation technology, selects steel blades with certain toughness and file teeth, and repeatedly rotates and rubs for physical separation, as well as space thermal excitation state to assist in softening asphalt stripping, and adopts multi-stage screening technology to achieve the purpose of fine separation of aggregates and asphalt in old asphalt pavement materials. The aggregates and asphalt in the old asphalt pavement materials are effectively separated at multiple levels (separated by multiple levels according to particle size), and the asphalt permeable membrane structure adhered to the surface of the aggregates in the old materials is not destroyed, so as to achieve efficient oil-stone separation of old asphalt pavement materials, ensure the overall quality of the aggregates after separation, and the high-value utilization of the aggregates in the recycling process, that is, to reduce the price of aggregates, reduce the amount of new asphalt, and achieve the best engineering application effect. At the same time, the recycling of old asphalt pavement materials with high efficiency, high value, refinement, and environmental protection is realized, and the purpose of turning old asphalt pavement materials from waste into treasure is achieved.

[0016] In the present invention, oil-stone separation is a special term, where "oil" refers to asphalt in old asphalt pavement materials, and "stone" refers to aggregate in old asphalt pavement materials (usually gravel that we are all familiar with, divided into different particle sizes). In old asphalt pavement materials, asphalt and aggregate are wrapped together in irregular blocks. The so-called oil-stone separation is to use certain technical means to separate the aggregate and asphalt in old asphalt pavement materials to achieve the recycling of aggregates. Generally, asphalt is difficult to separate and collect, and it is adhered to fine materials in aggregate (because aggregates are divided into different particle sizes, and aggregates with a particle size of less than 5mm are called sand) and used as asphalt sand.

[0017] In the present invention, the softening point of asphalt refers to the temperature at which the asphalt changes from solid to liquid during the temperature increase process.

[0018] Compared with the prior art, the present invention has the following beneficial effects: First, a creative method of using intensive filing technology to separate the oilstone from the old asphalt pavement material is proposed, that is, the tree-like grinding rod is used to rotate continuously for 360 degrees to separate the aggregate and asphalt in the old material. The grinding rod is provided with tree-like stirring blades with adjustable spacing. The stirring blades are cylindrical and have filing teeth with high toughness and good wear resistance. The old asphalt pavement material can be efficiently ground, so that the aggregate and asphalt are continuously separated during the rotation process. This method effectively protects the various properties of the aggregate in the old asphalt pavement material, does not cause secondary crushing of the aggregate in the old material, does not affect the mechanical properties of the aggregate in the old material, and can select a reasonable filing time and grinding rod speed according to the aging degree of the asphalt in the old asphalt pavement material, control the amount of old asphalt adhering to the aggregate surface after the old material is separated from the oilstone, maximize the use of the adhesion of the old asphalt, improve the bonding performance between the old aggregate and the aggregate, reduce the use of new asphalt in the recycling process, and achieve the best engineering application effect.

[0019] Secondly, a multi-level classification grinding oilstone separation technology was creatively proposed, that is, different rotating bins are used to perform graded oilstone separation within different particle size ranges. This technology can classify old asphalt pavement materials into different particle sizes. Generally, four different sieve holes with particle sizes of 30mm, 20mm, 10mm, and 5mm are used to divide the graded rotating bins into four different rotating separation bins of >30mm, 20~30mm, 10~20mm, and 5~10mm, recorded as levels I~IV. The spacing between the grinding rods in each rotating bin is set differently. Generally, the spacing between the grinding rods in the rotating separation bins of levels I~IV is set to 30mm, 20mm, 10mm, and 5mm, respectively, which can be adjusted according to actual engineering needs to meet the appropriate size of aggregate separation at each level and to achieve the purpose of fine separation of aggregate and asphalt in old materials.

[0020] Third, a space thermal excitation-assisted oil-stone separation technology was creatively proposed, that is, an adjustable temperature heating function is set on the grinding rod. The temperature is generally set not to exceed the softening point of the old material asphalt (referring to the temperature at which the asphalt changes from solid to liquid during the temperature increase process), usually around 40°C. If the old material is highly aged, a lower temperature is used. The space thermal excitation-assisted oil-stone separation technology is mainly a method of heating and stimulating the activity of asphalt in three-dimensional space during the old material processing process, which can quickly separate the asphalt from the aggregate, and use a temperature below the softening point for heating treatment, which can ensure that the asphalt is easy to separate from the aggregate and does not flow, making it easy to separate the operation. At the same time, it will not have the adverse effect of heating secondary aging on the asphalt, and retain the asphalt film structure that penetrates the surface of the aggregate, which is conducive to the recycling of the aggregate.

[0021] Fourth, the asynchronous thermal excitation oil-stone separation technology is innovatively proposed, that is, before the old asphalt pavement material is placed in the rotating separation bin, the grinding rod is first heated to a specified temperature, and then the old asphalt pavement material is placed in the heating environment for a certain period of time (the standing heating time is determined according to the aging degree of the old material), so that the old asphalt pavement material is initially softened and separated. The rotation function of the device is not turned on at this stage, which is called the static thermal excitation stage. After the heating is completed, the rotation function of the device is turned on again, and the oil-stone separation is carried out step by step under the action of rotation. During the rotating separation process, the spatial thermal excitation function of the rotating separation bins at all levels is turned on. The heating temperature of the rotating bins at all levels can be set uniformly or at different heating temperatures. According to the aging degree and gradation of the old material, a reasonable temperature setting is made, and the aggregate and asphalt in the old material are separated. This process is called the dynamic thermal excitation stage. The asynchronous thermal excitation oil-stone separation technology solves the engineering and technical problems that the initial old asphalt pavement material is not easy to break and it is not easy to retain the integrity and mechanical properties of the original aggregate gradation. In addition, the application of the new technology of dynamic thermal excitation oil-stone separation under the action of the rotating separation bin is realized, which is conducive to the fine separation of aggregates of different particle sizes.

[0022] Fifth, creatively propose the technology of combining reverse rotation, active and passive torque, and enhancing oil-stone separation, that is, the dense tree-like tree-like grinding rods rotate in the opposite direction to the multi-stage rotating separation bin, which is generally set to rotate the grinding rods clockwise and the multi-stage rotating separation bin counterclockwise to enhance the grinding strength of the asphalt pavement old material. At the same time, the asphalt pavement old material is designed to be in direct contact with the full longitudinal surface of the grinding rod, and the active torque is applied. The asphalt pavement old material is in contact with the multi-stage rotating separation bin at the bottom, and the reverse rotation applies passive torque. The active and passive torques cooperate with each other to enhance the separation effect of the asphalt old material.

[0023] Sixth, the innovative AI intelligent identification of aggregate asphalt oil film control technology is proposed, that is, an AI intelligent aggregate oil film controller is set at the appropriate position of the discharge port, and a large amount of sample data is used to perform AI identification and realize remote monitoring operations. Specifically, a large number of tests are conducted in advance on the aggregates with a certain amount of asphalt oil film adhered to the old asphalt pavement materials, and the images of aggregates with good results in the previous tests are collected and summarized and input into the AI ​​intelligent model library to achieve the purpose of intelligently identifying the quality of aggregate asphalt oil film. Real-time monitoring is carried out during the separation of old material oil and stone. When poorly separated aggregates appear, an alarm message is immediately issued. Through human intervention and adjustment of the operation process, the purpose of timely feedback and adjustment of the operation process is achieved to avoid the large-scale output of inferior aggregates and form a virtuous cycle mechanism.

[0024] Seventh, it is innovatively proposed to set up conveyor belts with automatic grabbing functions in the aggregate accumulation areas after separation, and set them to automatically grab a certain amount of aggregates of different particle sizes within a certain time interval, place them on the conveyor belts, and transmit them to the AI ​​intelligent aggregate oil film controller for identification. When it is identified that the aggregate separation effect does not meet the requirements, an alarm will be issued immediately and feedback will be given to the operator for real-time dynamic adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device of the present invention; Figure 2 The schematic diagram of the structure of the dendritic grinding rod; Figure 3 This is a schematic diagram of the structure of the grinding rod carrying platform; Figure 4 A schematic diagram of the partial structure of the separation chamber track; Among them, 1. Old asphalt pavement material; 2. Multi-stage rotating separation bin; 3. Dendritic grinding rod; 4. Level I separation bin; 5. Level II separation bin; 6. Level III separation bin; 7. Level IV separation bin; 8. Control discharge valve; 9. Discharge device; 10. Grinding rod start and stop and regulator; 11. Grinding rod heating regulator; 12. Separation bin start and stop and regulator; 13. Temperature controller; 14. Overload torque cutter; 15. Automatic aggregate conveying device; 16. AI intelligent aggregate oil film controller; 17. Mixing blades; 18. File teeth; 19. Fixed base; 20. Sieve holes; 21. Grinding rod spacing regulator; 22. Start and stop controller; 23. Emergency stop button; 24. Grinding rod bearing platform; 25. Separation bin track; 26. Screen residue discharge port. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with embodiments.

[0027] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0028] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connections. The term "and / or" used here includes any unit and all combinations of one or more associated listed items.

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0031] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0032] like Figure 1~Figure 4As shown, the intelligent multi-stage excitation asphalt pavement old material oil stone separation device includes a fixed base 19, a grinding rod start-stop and regulator 10, a grinding rod heating regulator 11 and a separation chamber start-stop and regulator 12; A multi-stage rotating separation chamber 2 is installed on the fixed base 19; The multi-stage rotating separation chamber 2 includes a first-stage separation chamber 4, a second-stage separation chamber 5, a third-stage separation chamber 6, and a fourth-stage separation chamber 7 which are coaxially arranged from top to bottom; the first-stage separation chamber 4, the second-stage separation chamber 5, the third-stage separation chamber 6, and the fourth-stage separation chamber 7 can all rotate independently; The bottoms of the first-level separation bin 4, the second-level separation bin 5, the third-level separation bin 6, and the fourth-level separation bin 7 are all sieve plates with sieve holes 20, and the diameters of the sieve holes of the four separation bins are arranged in descending order; The lower part of one side of the first-level separation bin 4, the second-level separation bin 5, the third-level separation bin 6, and the fourth-level separation bin 7 is connected to a discharge device 9 through a control discharge valve 8; The discharging ends of the four discharging devices 9 are arranged above the automatic material collection conveying device 15; A screened material discharge port 26 is installed on the side wall of the multi-stage rotary separation bin 2 and below the IV-stage separation bin 7; A grinding rod carrying platform 24 is installed in the lower part of each of the first-level separation chamber 4, the second-level separation chamber 5, the third-level separation chamber 6, and the fourth-level separation chamber 7; A plurality of branch-shaped grinding rods 3 are installed on the grinding rod carrying platform 24; The grinding rod start-stop and regulator 10 is connected to the dendrite-shaped grinding rod 3, and is used to control the start and stop of the dendrite-shaped grinding rod 3, and control the speed and rotation direction of the dendrite-shaped grinding rod 3; The dendrite-shaped grinding rod 3 has a built-in heating resistor wire; the grinding rod heating controller 11 is connected to the dendrite-shaped grinding rod 3 and is used to turn on and off the heating function of the dendrite-shaped grinding rod 3; The separation bin start-stop and regulator 12 are respectively connected to the level I separation bin 4, the level II separation bin 5, the level III separation bin 6, and the level IV separation bin 7, and are used to control the start and stop, rotation speed, rotation direction, and vibration frequency of the level I separation bin 4, the level II separation bin 5, the level III separation bin 6, and the level IV separation bin 7; For the first-level separation chamber 4, the second-level separation chamber 5, the third-level separation chamber 6, and the fourth-level separation chamber 7, the rotation direction of the four separation chambers is opposite to the rotation direction of the dendritic grinding rods 3 arranged therein; It also includes an AI intelligent aggregate oil film controller 16 and an overload torque cutter 14. The AI ​​intelligent aggregate oil film controller 16 is used to monitor whether the discharge of the automatic aggregate conveyor 15 meets the requirements of the corresponding level. If not, an alarm is issued; The overload torque cut-off device 14 is connected to the grinding rod start-stop and regulator 10 and is used to monitor the torque of the dendrite-shaped grinding rod 3; when the torque of the dendrite-shaped grinding rod 3 exceeds the set value, the rotation function of the grinding rod is cut off.

[0033] Specifically, it also includes a grinding rod spacing regulator 21; the grinding rod spacing regulator 21 is connected to the grinding rod supporting platform 24, and the grinding rod spacing regulator 21 is used to adjust the row spacing and column spacing of the installation position of the tree-shaped grinding rods 3 on the grinding rod supporting platform 24, so as to achieve the purpose of adjusting the grinding rod spacing.

[0034] Specifically, the bottoms of the level I separation bin 4, the level II separation bin 5, the level III separation bin 6, and the level IV separation bin 7 are all sieve plates with sieve holes 20, and the apertures thereof are 30 mm, 20 mm, 10 mm, and 5 mm, respectively.

[0035] Specifically, it also includes a temperature controller 13, and temperature sensors are provided in the level I separation chamber 4, the level II separation chamber 5, the level III separation chamber 6, and the level IV separation chamber 7; the temperature controller 13 is respectively connected to the grinding rod heating controller 11 and the temperature sensor; and is used to control the heating temperature of the grinding rod heating controller 11 according to the temperature detected by the temperature sensor, thereby controlling the temperature in the level I separation chamber 4, the level II separation chamber 5, the level III separation chamber 6, and the level IV separation chamber 7.

[0036] Specifically, the branch-shaped grinding rod 3 includes a trunk and branches connected to the trunk; the branches are stirring blades 17; and the surfaces of the stirring blades 17 are evenly provided with file teeth 18.

[0037] Specifically, it also includes a start-stop controller 22 and an emergency stop button 23; The start-stop controller 22 is connected to the external power supply system and is used to control the start and stop of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device when the intelligent multi-stage excitation asphalt pavement old material oil stone separation device is powered on; The emergency stop button 23 is used to stop the operation of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device in an emergency and put it in a power-off state.

[0038] Specifically: Old asphalt pavement material 1, due to the waste asphalt mixture milled down during maintenance and repair, the asphalt and aggregate are wrapped together and have irregular shapes.

[0039] The multi-stage rotary separation bin 2 provides a space for oilstone separation for the asphalt pavement waste material 1. The separation bins are divided into different levels according to the sieve hole (the diameter of the round hole is generally 30mm, 20mm, 10mm, and 5mm). In general highway projects, the sieve hole size is divided into four different levels, namely, >30mm, 20~30mm, 10~20mm, and 5~10mm; that is, for the I-level separation bin 4, the II-level separation bin 5, the III-level separation bin 6, and the IV-level separation bin 7, the aggregates passing through the sieve holes at the bottom of each level of separation bin enter the next level of separation operation, and the aggregates remaining in the separation bin at this level are larger than the sieve holes of this level but smaller than the aggregates of the sieve holes of the previous level. The aggregate particle sizes commonly used in engineering are divided into four levels: >30mm, 20~30mm, 10~20mm, and 5~10mm, which are recorded as I, II, III, and IV respectively. The present invention can regulate the rotation speed and rotation direction of the separation bin according to actual engineering requirements. The multi-stage rotating separation bin 2 is generally a double-layer outer wall structure so that it has a heat preservation function.

[0040] The dendrite grinding rod 3 is generally made of steel, has sufficient rigidity, strength, and wear resistance, and includes a trunk and branches connected to the trunk; the branches are stirring blades 17; the surface of the stirring blades 17 is evenly provided with file teeth 18; the vertical and horizontal spacing between the dendrite grinding rods 3 is adjustable, and has a heating function, and its heating temperature is adjustable, and a constant temperature state can be maintained. Generally, its temperature is set below the softening point of asphalt, and can be appropriately lowered according to the degree of asphalt aging, so that the asphalt is softened and easy to peel off from the aggregate, but it is appropriate not to soften and flow, and the commonly used temperature in engineering is 30~40℃. A heating resistance wire is arranged inside the dendrite grinding rod 3, and the heating function is realized by the principle of electric heating. The temperature set in the present invention is generally 40℃, 35℃, and 30℃, which should not be too high or too low. Too high stability makes the asphalt softening and flowing unfavorable for oilstone separation, and too low temperature asphalt softening effect and softening time are not ideal, so the preferred value is recommended to be 30℃~40℃. The dendritic grinding rod 3 is more preferably a dendritic grinding rod 3 with denser branches.

[0041] The first-level separation bin 4 provides a space for the preliminary separation of old asphalt pavement materials and the separation of aggregates with a particle size greater than 30 mm. The bottom sieve hole controls the particle size to 30 mm and can rotate independently. The rotation direction and speed are adjustable. It is generally a double-layer outer wall structure with a heat preservation function.

[0042] The second-level separation bin 5 provides a space for separating the 20-30mm particle size aggregate of the old asphalt pavement material. The bottom sieve hole controls the particle size to 20mm. It can rotate independently, and the rotation direction and speed can be adjusted. It is generally a double-layer outer wall structure with a heat preservation function.

[0043] The Class III separation bin 6 provides a space for separating the 10-20mm aggregate of the old asphalt pavement material. The bottom sieve hole controls the particle size to 10mm. It can rotate independently, and the rotation direction and speed are adjustable. It is generally a double-layer outer wall structure with a heat preservation function.

[0044] The IV-level separation bin 7 provides a space for separating the 5-10mm particle size aggregate of the asphalt pavement waste material. The bottom sieve hole controls the particle size to 5mm and can rotate independently. The rotation direction and speed can be adjusted. It is generally a double-layer outer wall structure with a heat preservation function. The screened material of the IV-level separation bin 7 is discharged through the screened material discharge port 26.

[0045] In each separation bin, what remains after separation are aggregates that are larger than the current sieve holes but smaller than the upper sieve holes. Therefore, the grading is based on the upper and lower sieve hole size ranges, rather than a single point size grading.

[0046] The first-level separation chamber 4, the second-level separation chamber 5, the third-level separation chamber 6, and the fourth-level separation chamber 7 are equipped with motors, which are used to rotate and vibrate, and the rotation speed, rotation direction, and vibration frequency are controlled by the separation chamber start and stop and the regulator 12. The four separation chambers usually rotate in the opposite direction to the direction of rotation of the dendrite grinding rod 3, thereby enhancing the oilstone separation effect.

[0047] The control discharge valve 8 has the function of controlling the discharge of aggregates from each level of separation bins. During the rotation process of separation of old material and oilstone, the control discharge valve 8 is closed. After the rotation separation reaches the specified time, the control discharge valve 8 is opened to allow the aggregates after separation of the oilstone to be discharged from the separation bin along the discharge device 9.

[0048] The discharging device 9 provides a discharging path for the aggregates. The aggregates separated from the oilstone can be stacked at a designated location along the discharging device 9 to prevent disorderly accumulation of the aggregates.

[0049] The grinding rod start-stop and regulator 10 can control the start and stop of the dendrite-shaped grinding rod 3, and can adjust its rotation speed and rotation direction. The rotation speed of the grinding rod is adjusted according to the actual engineering requirements and the aging degree of the old asphalt pavement material to achieve the best grinding effect.

[0050] The grinding rod heating controller 11 can independently control the opening and closing of the heating function of the dendritic grinding rod 3, and adjust the specific value of the heating. Generally, the set temperature is lower than the softening point of the asphalt, preferably 30-40°C. The temperature value can be adjusted according to actual needs so that the asphalt can be easily peeled off from the aggregate without forming a flowing liquid.

[0051] The separation bin start / stop and regulator 12 is used to control the start and stop of the multi-stage rotating separation bin 2, and can adjust the rotation speed and rotation direction of the separation bin, as well as turn on the vibration function of the separation bin. The rotation speed and vibration frequency of the separation bin are adjusted according to actual engineering requirements to achieve the best oil-stone separation effect.

[0052] The temperature controller 13 is used to control the temperature in each separation bin (I-level separation bin 4, II-level separation bin 5, III-level separation bin 6, IV-level separation bin 7) so that the temperature in the separation bin reaches the set temperature value and maintains a constant temperature. The temperature in each separation bin can be controlled independently. Generally, during the separation operation, the I-level separation bin is first heated to a specified temperature, and after maintaining the set time, the heating function in other separation bins is turned on to achieve an asynchronous spatial thermal excitation effect, achieving the dual effects of preliminary separation of old asphalt pavement materials and refined separation.

[0053] The overload torque cutoff device 14 is used to control the phenomenon that the branch-shaped grinding rod 3 may be stuck due to the irregular block structure of the old asphalt pavement material due to the large torque applied. The overload torque cutoff device 14 is set to cut off the rotation function of the branch-shaped grinding rod 3 when the torque of the branch-shaped grinding rod 3 exceeds the set value to avoid damage to the grinding rod.

[0054] The automatic aggregate conveying device 15 includes a conveyor belt and a grabbing device, which is used to convey aggregates. Conveying devices with automatic grabbing functions are respectively arranged in the aggregate accumulation areas after separation. A certain amount of aggregates of different particle sizes are automatically grabbed within a certain time interval, placed on the conveyor belt, and transmitted to the AI ​​intelligent aggregate oil film controller 16 for identification. When it is identified that the aggregate separation effect does not meet the requirements, an alarm is immediately issued and feedback is given to the operator for real-time dynamic adjustment.

[0055] The AI ​​intelligent aggregate oil film controller 16 is used to intelligently identify whether the aggregate after separation meets the set requirements. The AI ​​intelligent aggregate oil film controller 16 includes an AI visual monitor; the AI ​​visual monitor mainly refers to an intelligent camera, a background database and a visual screen. The intelligent camera transmits the collected images to the background database for comparison, and then displays the structure on the screen for reference for human intervention. The background database is pre-stored with an AI intelligent model library; the AI ​​intelligent model library is a database established in advance, that is, the better oil-stone separation aggregates made in the test are photographed and trained by the program, so that the model library can remember the better images, and then collect external images and compare them with the better images in the model library. It is mainly to identify the adhesion area of ​​the asphalt oil film on the aggregate to determine. When it reaches above the specified adhesion area (generally 50%), it is judged as a better separation result, and the oil-stone separation can continue. When it reaches below the specified adhesion area, it is judged as a poor separation result. At this time, human intervention and operation adjustment are used to achieve the purpose of timely feedback.

[0056] Specifically, an AI visual monitor is set at a suitable position of the discharge port, and a large number of tests are carried out in advance on aggregates with a certain amount of asphalt oil film adhered to the old asphalt pavement materials. The images of aggregates with good results in the previous tests are collected and summarized and input into the AI ​​intelligent model library to achieve the purpose of intelligently identifying the quality of the aggregate asphalt oil film. Real-time monitoring is carried out during the oil-stone separation process of the old materials. When poorly separated aggregates appear, an alarm message is immediately issued. Through human intervention and adjustment of the operating process, the purpose of timely feedback and adjustment of the operating process is achieved, thereby avoiding the large-scale output of inferior aggregates and forming a virtuous cycle mechanism.

[0057] The stirring blade 17 is used for the stirring function of effectively separating the aggregate and asphalt in the old asphalt pavement material. The stirring blade should not be too hard to avoid crushing and damaging the original aggregate, and it should not be too soft, otherwise it will not be able to effectively separate the aggregate and asphalt. Generally, a columnar steel material with appropriate hardness and softness is used. The size of the blade is adjusted according to the aggregate particle size in the old asphalt pavement material, and the blade spacing and angle are adjustable.

[0058] The file teeth 18 are used for kneading the aggregate and asphalt in the old asphalt pavement material to effectively separate the aggregate and asphalt. The file teeth 18 have sufficient strength, hardness, toughness and wear resistance and are generally made of high carbon steel, corundum, or other hard materials.

[0059] The fixed base 19 is used to fix the entire device so that it does not move significantly during the rotation process, thereby ensuring the stable operation of the entire device.

[0060] The sieve hole 20 is arranged at the bottom of the multi-stage rotary separation bin 2, and is used to screen aggregates of different particle sizes. Generally, the sieve hole 20 is set to be circular or square, with circular being the main shape. The size of the sieve hole 20 is generally set to four grades of 30mm, 20mm, 10mm, and 5mm, which are respectively arranged at the bottom of the separation bins of levels I to IV.

[0061] The grinding rod spacing regulator 21 is used to adjust the longitudinal and transverse spacing between the dendritic grinding rods 3, and adjust the longitudinal and transverse spacing of the dendritic grinding rods 3 according to the aggregate particle size in the asphalt pavement old material, so that aggregates of different particle sizes are fully ground to achieve the best oil stone separation effect. The grinding rod spacing regulator 21 is preferably installed on the other side outer wall of the multi-stage rotary separation bin 2, specifically, located on the outer wall of the multi-stage rotary separation bin 2 corresponding to the position of its corresponding grinding rod bearing platform 24. For the first-level separation bin 4, the second-level separation bin 5, the third-level separation bin 6, and the fourth-level separation bin 7, each is installed with a grinding rod bearing platform 24, and each grinding rod bearing platform 24 has a grinding rod spacing regulator 21 to regulate the longitudinal and transverse spacing of the dendritic grinding rods 3 installed thereon, that is, there are a total of 4 grinding rod bearing platforms 24, corresponding to 4 grinding rod spacing regulators 21.

[0062] The start-stop controller 22 is used to control the start and stop of the entire device to realize the operation and stop of the entire device.

[0063] The emergency stop button 23 is used to stop all functions of the device in an emergency to prevent accidents. The stop button in the start-stop controller 22 only stops the operation of the device, but the device is still powered on and the power supply is not cut off. Pressing the emergency stop button 23 is equivalent to cutting off the power supply of the entire device, making the entire device in a power-off state.

[0064] The grinding rod bearing platform 24 has sufficient rigidity and strength to fix the grinding rods and to assist in providing components for adjusting the spacing between the grinding rods. The grinding rod bearing platform 24 also has a built-in motor connected to the branch-shaped grinding rods 3 mounted thereon to provide rotational power to the branch-shaped grinding rods 3; For the level I separation bin 4, level II separation bin 5, level III separation bin 6, and level IV separation bin 7, the grinding rod carrying platform 24 in each separation bin is arranged above the sieve plate of the separation bin, and there is a reasonable distance ≥30mm between the sieve plate to facilitate material unloading.

[0065] The separation bin track 25 has sufficient rigidity and strength to provide a rotation track for the rotation of each level of the separation bin. The multi-level rotating separation bin 2 has multiple separation bin tracks 25 built in, and the I-level separation bin 4, the II-level separation bin 5, the III-level separation bin 6, and the IV-level separation bin 7 are respectively rotated on their respective separation bin tracks 25 through their own motors. That is, each separation bin is connected to a separation bin track 25 and can move relative to the separation bin track 25 to achieve rotation.

[0066] The screen residue discharge port 26 is used to discharge the screen residue from the IV-level separation bin 7 and separate it to a designated location.

[0067] The method of using the device of the present invention is as follows: The asphalt pavement old material fine oil stone separation device is firmly fixed in the designated position under the action of the fixed base 19 to ensure the stability of the device during operation. The sieve holes 20 of each level are generally set according to the commonly used specifications in highway engineering, that is, 30mm, 20mm, 10mm, and 5mm. When finely separating the asphalt pavement old material 1 from the oil stone, first use the grinding rod spacing regulator 21 to adjust the longitudinal and transverse spacing of the dendritic grinding rods 3 in each level of separation bin according to the engineering requirements, and then put the asphalt pavement old material 1 into the I-level separation bin 4 of the multi-level rotary separation bin 2, and control the discharge valve 8 to be in a closed state. Turn on the start-stop controller 22 to put the entire device in a power-on ready-to-work state, turn on the grinding rod heating controller 11, set a suitable heating temperature, turn on the temperature controller 13, only heat the dendritic grinding rods 3 in the I-level separation bin 4, and control the temperature at the set threshold value, and let it stand for a certain period of time. At this stage, the old asphalt pavement material 1 gradually begins to initially split under the thermal excitation conditions of a certain temperature in the first-level separation bin 4, and the asphalt in the old asphalt pavement material 1 begins to soften, but does not reach the state of flowing at the softening point. This stage is called the static thermal excitation state. After a certain period of time, the old asphalt pavement material 1 undergoes initial splitting to form old materials that are easy to separate in a fine manner.

[0068] Then, the grinding rod start-stop and regulator 10 is turned on, and the speed and rotation direction of the dendritic grinding rod 3 are adjusted according to actual needs. Generally, the dendritic grinding rod 3 is set to rotate clockwise. At the same time, the dendritic grinding rods 3 in the I-level separation bin 4, the II-level separation bin 5, the III-level separation bin 6, and the IV-level separation bin 7 are turned on to start rotating and grinding at the set speed and direction. At this time, the grinding rod rotates to drive the stirring blade 17 to start stirring, shearing, and grinding the aggregate and asphalt mixture in the old material. Under the action of the file teeth 18 on the stirring blade 17, the grinding effect of the old material is enhanced to achieve the best oilstone separation effect. Adjust the temperature controller 13 so that the grinding rods in each level of separation bin start to strengthen according to the set temperature and can be maintained at the set constant temperature state. Turn on the separation bin start-stop and regulator 12, set the speed and rotation direction of the multi-stage rotating separation bin 2 according to the project requirements, and generally set the separation bins at each level to rotate counterclockwise and run in the opposite direction of the grinding rod to achieve the enhanced oilstone separation effect. This stage is called the dynamic thermal excitation state. Under the dual reverse rotation force of the grinding rod and the separation bin, and the auxiliary action of thermal excitation of each level of separation bin, the old asphalt pavement material 1 undergoes a refined separation process to achieve the stripping effect of aggregate and asphalt.

[0069] When the rotation separation time reaches the set value, the discharge valve 8 is opened to control the separated aggregates to reach the designated position along the discharge device 9 for orderly stacking. Automatic aggregate conveying devices 15 with automatic grabbing functions are respectively set at the stacking points of aggregates of different particle sizes, and the separated aggregates of each block are conveyed to the AI ​​intelligent aggregate oil film controller 16 at a certain time interval for intelligent identification. If the aggregate effect after separation is not good, an alarm is issued in time and feedback is given to the operator for dynamic adjustment.

[0070] When the grinding rod is overloaded with torque during the separation of the asphalt pavement old material 1, the overload torque cut-off device 14 is automatically started to stop the operation of the grinding rod. When an emergency occurs, the emergency button 23 is pressed to stop the operation of all functions of the device to prevent accidents.

[0071] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Intelligent multi-stage excitation asphalt pavement old material oil stone separation device, characterized by: It comprises a fixed base (19), a grinding rod start / stop and regulator (10), a grinding rod heating regulator (11) and a separation chamber start / stop and regulator (12); A multi-stage rotating separation chamber (2) is mounted on the fixed base (19); The multi-stage rotating separation chamber (2) comprises a first-stage separation chamber (4), a second-stage separation chamber (5), a third-stage separation chamber (6), and a fourth-stage separation chamber (7) which are coaxially arranged from top to bottom; the first-stage separation chamber (4), the second-stage separation chamber (5), the third-stage separation chamber (6), and the fourth-stage separation chamber (7) can all rotate independently; The bottoms of the first-level separation bin (4), the second-level separation bin (5), the third-level separation bin (6), and the fourth-level separation bin (7) are all sieve plates with sieve holes (20), and the diameters of the sieve holes of the four separation bins are arranged in descending order; The lower part of one side of the first-level separation bin (4), the second-level separation bin (5), the third-level separation bin (6), and the fourth-level separation bin (7) is connected to a discharge device (9) via a control discharge valve (8); The discharging ends of the four discharging devices (9) are arranged above the automatic material collection conveying device (15); A screened material discharge port (26) is installed on the side wall of the multi-stage rotary separation bin (2) and below the IV-stage separation bin (7); A grinding rod bearing platform (24) is respectively installed at the lower part of the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7); A plurality of branch-shaped grinding rods (3) are mounted on the grinding rod bearing platform (24); The grinding rod start-stop and regulator (10) is connected to the dendrite-shaped grinding rod (3) and is used to control the start and stop of the dendrite-shaped grinding rod (3) and to control the rotation speed and rotation direction of the dendrite-shaped grinding rod (3); The dendrite-shaped grinding rod (3) has a built-in heating resistance wire; the grinding rod heating controller (11) is connected to the dendrite-shaped grinding rod (3) and is used to turn on and off the heating function of the dendrite-shaped grinding rod (3); The separation chamber start-stop and regulator (12) are respectively connected to the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7) to control the start and stop, rotation speed, rotation direction, and vibration frequency of the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7); For the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7), the rotation direction of the four separation chambers is opposite to the rotation direction of the dendritic grinding rods (3) arranged therein; It also includes an AI intelligent aggregate oil film controller (16) and an overload torque cut-off device (14). The AI ​​intelligent aggregate oil film controller (16) is used to monitor whether the discharge of the automatic aggregate conveying device (15) meets the requirements of the corresponding level. If not, an alarm is issued; The overload torque cut-off device (14) is connected to the grinding rod start-stop and regulator (10) and is used to monitor the torque of the dendrite-shaped grinding rod (3); when the torque of the dendrite-shaped grinding rod (3) exceeds a set value, the rotation function of the grinding rod is cut off.

2. The intelligent multi-stage excitation asphalt pavement old material oil stone separation device according to claim 1 is characterized in that: It also includes a grinding rod spacing regulator (21); the grinding rod spacing regulator (21) is connected to the grinding rod bearing platform (24), and the grinding rod spacing regulator (21) is used to regulate the row spacing and column spacing of the installation positions of the tree-shaped grinding rods (3) on the grinding rod bearing platform (24), thereby achieving the purpose of regulating the grinding rod spacing.

3. The intelligent multi-stage excitation asphalt pavement old material oil stone separation device according to claim 1 is characterized in that: The bottoms of the first-level separation bin (4), the second-level separation bin (5), the third-level separation bin (6), and the fourth-level separation bin (7) are all sieve plates with sieve holes (20) with apertures of 30 mm, 20 mm, 10 mm, and 5 mm, respectively.

4. The intelligent multi-stage excitation asphalt pavement old material oil stone separation device according to claim 1 is characterized in that: The invention also includes a temperature controller (13), and temperature sensors are provided in the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7); the temperature controller (13) is connected to the grinding rod heating controller (11) and the temperature sensor, respectively; and is used to control the heating temperature of the grinding rod heating controller (11) according to the temperature detected by the temperature sensor, thereby controlling the temperature in the first-level separation chamber (4), the second-level separation chamber (5), the third-level separation chamber (6), and the fourth-level separation chamber (7).

5. The intelligent multi-stage excitation asphalt pavement old material oil stone separation device according to claim 1 is characterized in that: The branch-shaped grinding rod (3) comprises a trunk and branches connected to the trunk; the branches are stirring blades (17); and the surface of the stirring blades (17) is evenly provided with file teeth (18).

6. The intelligent multi-stage excitation asphalt pavement old material oil stone separation device according to claim 1 is characterized in that: Also includes a start-stop controller (22) and an emergency stop button (23); The start-stop controller (22) is connected to an external power supply system and is used to control the start and stop of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device when the intelligent multi-stage excitation asphalt pavement old material oil stone separation device is powered on; The emergency stop button (23) is used to stop the operation of the intelligent multi-stage excitation asphalt pavement old material oil stone separation device in an emergency situation, so that it is in a power-off state.

Images