Asphalt pavement old material recovery device and method

Abstract

The invention provides an asphalt pavement old material recycling device and method, and belongs to the technical field of crushing machining, and the asphalt pavement old material recycling device comprises a first-stage crushing assembly, a second-stage crushing assembly and a separation assembly; the separation assembly is arranged between the first-stage crushing assembly and the second-stage crushing assembly; the separation assembly comprises a liquid storage tank, a first discharging mechanism and a second discharging mechanism; liquid used for enabling asphalt in the mixture to float and stone in the mixture to sink to the bottom is arranged in the liquid storage tank, a heating component is arranged on the liquid storage tank, and the first discharging mechanism is arranged on the liquid storage tank and used for discharging the stone in the liquid storage tank; the second discharging mechanism is arranged on the liquid storage tank and used for discharging asphalt in the liquid storage tank to the second-stage crushing assembly. And a cooling component is arranged between the second discharging mechanism and the second-stage crushing assembly. According to the asphalt pavement old material recovery device and the asphalt pavement old material recovery method provided by the invention, the separation efficiency of asphalt is improved, and impurities in the separated asphalt are greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of crushing processing, and more specifically, relates to a device and method for recycling old asphalt pavement materials. Background Art

[0002] Asphalt pavement has good driving comfort and excellent performance, and asphalt pavement is fast to build and easy to maintain, so it is widely used in pavement construction. Considering the maintenance cost and environmental protection of asphalt pavement, the recycling of asphalt in old asphalt pavement materials is very important.

[0003] At present, when the asphalt in the asphalt pavement is to be recycled, the old asphalt pavement is first dug up to obtain the old asphalt pavement material, which is then transported to the recycling plant for crushing and processing; the crushed old material is mainly separated by centrifugal extraction equipment; the centrifugal extraction equipment can heat the old material to melt and soften the asphalt in the old material, and then the equipment rotates at high speed to separate the asphalt from the stone by centrifugal force.

[0004] The inventors found that when the existing centrifugal extraction equipment is used to recycle asphalt, not only is the separation efficiency low and time-consuming, but continuous heating will cause serious aging of the asphalt. In addition, the stones in the old material are easily separated along with the asphalt under the action of centrifugation, resulting in a large amount of stone impurities in the recycled asphalt. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for recycling old asphalt pavement materials, so as to solve the technical problems existing in the prior art of low separation efficiency and more stone impurities in the separated asphalt when recycling old asphalt pavement materials.

[0006] To achieve the above purpose, the technical solution adopted in this application is: Provided is an asphalt pavement waste material recycling device, comprising: a primary crushing assembly for fragmenting the asphalt pavement waste material, and a secondary crushing assembly for granulating the asphalt; characterized in that a separation assembly is provided between the primary crushing assembly and the secondary crushing assembly, and the separation assembly comprises: A liquid storage tank is used to receive the fragmented mixture of asphalt and stone, and contains liquid inside the liquid storage tank for making the asphalt in the mixture float and the stone in the mixture sink to the bottom; and a heating member is provided on the liquid storage tank for heating the liquid inside the liquid storage tank; A first discharge mechanism, disposed on the liquid storage tank, for discharging stones in the liquid storage tank; and A second discharge mechanism is provided on the liquid storage tank and is connected to the secondary crushing assembly, and is used for discharging the asphalt inside the liquid storage tank to the secondary crushing assembly; a cooling component is provided between the second discharge mechanism and the secondary crushing assembly, and the cooling component is used for reducing the temperature of the asphalt.

[0007] In a possible implementation, the first discharging mechanism includes: a discharge pipe, disposed outside the liquid storage tank, with the upper end of the discharge pipe being located above the inner cavity of the liquid storage tank and the lower end of the discharge pipe being connected to the bottom of the liquid storage tank; and The spiral blade is coaxially arranged inside the discharge pipe and is transmission-connected with a first driving motor for driving the spiral blade to rotate, so that the stone inside the discharge pipe moves toward the upper end of the discharge pipe.

[0008] In a possible implementation, the outer edge of the spiral blade is connected to the inner wall of the discharge pipe, and the spiral blade has a through hole that penetrates along the thickness direction and is suitable for allowing liquid to pass through and restricting the passage of stones.

[0009] In a possible implementation, a discharge port communicating with the interior of the liquid storage tank and facing the secondary crushing assembly is provided on the outer peripheral wall of the liquid storage tank, and the second discharge mechanism includes: The mesh plate is hinged on the liquid storage tank and is transmission-connected to a transmission member for driving the mesh plate to swing; The mesh plate has a first state in which it swings to the inside of the liquid storage tank, and a second state in which it swings to the outside of the liquid storage tank through the discharge port; When the mesh plate swings from the first state to the second state, the asphalt fragments floating on the liquid surface inside the liquid storage tank can move with the mesh plate to the outside of the liquid storage tank and fall into the secondary crushing assembly.

[0010] In a possible implementation, a groove is provided on the inner wall of the liquid storage tank; The mesh plate in the first state can close part of the groove, and when the mesh plate swings from the second state to the first state, asphalt fragments floating on the liquid surface inside the liquid storage tank can move with the mesh plate to the inside of the groove.

[0011] In a possible implementation, the second discharging mechanism further includes: A turntable is rotatably disposed in the groove and is transmission-connected to a second drive motor for driving the turntable to rotate; When the second drive motor drives the turntable to rotate, the asphalt fragments pass through the grooves under the action of centrifugal force to avoid the partial opening of the mesh plate and enter the liquid storage tank, and the mesh plate swings from the first state to the second state.

[0012] In a possible implementation, the mesh plate has a plurality of convex teeth arranged at intervals along a straight line direction, and the straight line direction is perpendicular to the hinge axis of the mesh plate; the mesh plate further includes: A vibration component is disposed on the liquid storage tank and is used to generate and transmit vibration to the mesh plate in the second state so as to separate the asphalt from the mesh plate.

[0013] In a possible implementation, the cooling component includes: Two nozzles are arranged in parallel on both sides of the mesh plate along the rotation axis of the mesh plate, and are both fixedly connected to the liquid storage tank; the nozzle of each nozzle is arranged toward the liquid surface; and The refrigeration equipment is used to generate low-temperature gas, and is connected to the two nozzles through a gas distribution pipe so that the low-temperature gas is transported to the liquid surface through each nozzle.

[0014] In a possible implementation, the liquid storage tank further includes: A stirring shaft is rotatably connected to the inside of the liquid storage tank; the stirring shaft is provided with a plurality of levers, and the plurality of levers are arranged on the outer wall of the stirring shaft at circumferential intervals around the stirring shaft; the stirring shaft is transmission-connected to a third drive motor for driving it to rotate so as to stir the liquid inside the liquid storage tank.

[0015] In the embodiment of the present application, when using a recycling device to process old asphalt materials, the old asphalt pavement materials are loaded into a primary crushing assembly, and the primary crushing assembly is turned on to process the old materials into an asphalt mixture, and then the asphalt is transferred to a liquid storage tank, and the liquid is heated to a predetermined temperature by a heating component, so that the asphalt in the mixture melts and floats on the surface of the liquid, and the stone sinks to the bottom, and then the first discharge mechanism is used to transport the stone inside the liquid storage tank to the outside of the liquid storage tank, and the second discharge mechanism is used to transport the asphalt inside the liquid storage tank to the secondary crushing assembly, and at the same time the temperature of the asphalt is lowered by a cooling component, and finally the secondary crushing assembly is turned on to process the cooled asphalt into asphalt particles.

[0016] The asphalt pavement waste material recycling device provided in the embodiment of the present application improves the asphalt separation efficiency compared with the prior art, and the impurity content in the separated asphalt particles is greatly reduced, thereby improving the separation purity of the asphalt.

[0017] The technical solution adopted in the present application also provides a method for recycling old asphalt pavement materials, based on the old asphalt pavement material recycling device described in any one of the above contents, comprising the following steps: A. loading old asphalt pavement materials into the primary crushing assembly, opening the primary crushing assembly to break the old materials into pieces to form an asphalt mixture; B. transferring the asphalt mixture into the liquid storage tank, heating the liquid to a specific temperature through the heating member, so that the asphalt in the mixture melts and floats on the liquid surface, while the stones sink to the bottom; C. transporting the stone to the outside of the liquid storage tank through the first discharging mechanism; D. transporting the asphalt into the secondary crushing assembly through the second discharging mechanism; and at the same time, lowering the temperature of the asphalt through the cooling member to increase the hardness of the asphalt; E. Opening the secondary crushing assembly to granulate the asphalt into asphalt pellets.

[0018] The beneficial effects of the asphalt pavement waste material recycling method provided in this embodiment are the same as the beneficial effects of the aforementioned asphalt pavement waste material recycling device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the asphalt pavement waste material recycling device provided in an embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of the asphalt pavement waste material recycling device provided in an embodiment of the present invention Figure 2 ; Figure 3 A schematic diagram of the front view of the structure of the asphalt pavement waste material recycling device provided by an embodiment of the present invention; Figure 4 for Figure 3 The schematic diagram of the top view of the asphalt pavement waste material recycling device shown; Figure 5 For along Figure 3 Schematic diagram of the cross-sectional structure along the AA line; Figure 6 For along Figure 4 Schematic diagram of the cross-sectional structure along the middle BB line; Figure 7 for Figure 5Schematic diagram of the enlarged structure of the middle I region; Figure 8 for Figure 6 Schematic diagram of the enlarged structure of the middle II region; Fig. 9 for Figure 6 Schematic diagram of the enlarged structure of the middle III region; Fig.10 A schematic diagram of the three-dimensional structure of the screen plate used in the embodiment of the present invention; Among them, the reference numerals in the figure are: 1. Liquid storage tank; 11. Heating component; 12. Groove; 13. Agitator shaft; 131. Push rod; 132. Third drive motor; 2. First discharge mechanism; 21. Discharge pipe; 22. Spiral blade; 221. Through hole; 23. First drive motor; 31. Mesh plate; 311. Protruding teeth; 312. Vibrating component; 32. Transmission component; 33. Turntable; 331. Second drive motor; 4. Cooling component; 41. Nozzle; 42. Refrigeration equipment; 43. Gas distribution pipe; 5. Primary crushing assembly; 6. Secondary crushing assembly. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 10 The asphalt pavement waste material recycling device and the asphalt pavement waste material recycling method provided by the present application are now described. The asphalt pavement waste material recycling device comprises a primary crushing assembly 5 for fragmenting the asphalt pavement waste material, and a secondary crushing assembly 6 for granulating the asphalt; a separation assembly is provided between the primary crushing assembly 5 and the secondary crushing assembly 6, and the separation assembly comprises a liquid storage tank 1, a first discharge mechanism 2 and a second discharge mechanism.

[0026] The liquid storage tank 1 is used to receive a fragmented mixture of asphalt and stone, and has a liquid inside for making the asphalt in the mixture float and the stone in the mixture sink to the bottom; the liquid can be concentrated brine, the density of asphalt is between 1.15g / cm³ and 1.25g / cm³, and the density of salt is 2.165g / cm³, so the density of concentrated brine is greater than the density of asphalt, so the asphalt can float on the liquid surface of the concentrated brine; and, the liquid storage tank 1 is provided with a heating component 11 for heating the liquid inside it, and the heating component 11 can heat the concentrated brine to not less than 250°C, so that the temperature of the concentrated brine is greater than the melting point of the asphalt, so that the asphalt can melt into a liquid state, and then the asphalt is separated from the stone.

[0027] The first discharging mechanism 2 is arranged on the liquid storage tank 1, and is used for discharging the stones in the liquid storage tank 1; the first discharging mechanism 2 can adopt a manually driven or automatically driven conveyor belt device.

[0028] The second discharging mechanism is arranged on the liquid storage tank 1 and is connected with the secondary crushing assembly 6, and is used for discharging the asphalt inside the liquid storage tank 1 to the secondary crushing assembly 6; a cooling component 4 is provided between the second discharging mechanism and the secondary crushing assembly 6, and the cooling component 4 is used for reducing the temperature of the asphalt so that the temperature of the melted asphalt is reduced to below the melting point, so that the asphalt is restored to a state with a higher hardness, so that the secondary crushing assembly 6 can crush the asphalt.

[0029] In the embodiment of the present application, when using the recycling device to process the old asphalt material, the old asphalt pavement material is loaded into the primary crushing component 5, and the primary crushing component 5 is turned on to process the old material into an asphalt mixture, and then the asphalt is transferred to the liquid storage tank 1, and the liquid is heated to a predetermined temperature by the heating component 11, so that the asphalt in the mixture melts and floats on the surface of the liquid, and the stone sinks to the bottom, and then the first discharge mechanism 2 is used to transport the stone inside the liquid storage tank 1 to the outside of the liquid storage tank 1, and the second discharge mechanism is used to transport the asphalt inside the liquid storage tank 1 to the secondary crushing component 6, and the temperature of the asphalt is lowered by the cooling component 4, and finally the secondary crushing component 6 is turned on to process the cooled asphalt into asphalt particles.

[0030] The asphalt pavement waste material recycling device provided in the embodiment of the present application improves the asphalt separation efficiency compared with the prior art, and the impurity content in the separated asphalt particles is greatly reduced, thereby improving the separation purity of the asphalt.

[0031] In some embodiments, the first discharging mechanism 2 may be configured as follows: Figures 1 to 8 The structure shown, see Figures 1 to 8 The first discharging mechanism 2 includes a discharging pipe 21 and a spiral blade 22 .

[0032] The discharge pipe 21 can be made of stainless steel. The discharge pipe 21 is arranged outside the liquid storage tank 1, and the upper end of the discharge pipe 21 is located above the inner cavity of the liquid storage tank 1, and the lower end is connected to the bottom of the liquid storage tank 1; the upper end of the discharge pipe 21 is located above the inner cavity of the liquid storage tank 1 in order to prevent the liquid inside the liquid storage tank 1 from flowing out from the upper end of the discharge pipe 21 due to the connecting pipe effect.

[0033] The spiral blade 22 is coaxially arranged inside the discharge pipe 21 and is transmission-connected to a first driving motor 23 for driving the spiral blade 22 to rotate, so that the stones inside the discharge pipe 21 move toward the upper end of the discharge pipe 21 .

[0034] By adopting the above technical solution, the spiral blade 22 utilizes the first drive motor 23 to drive the spiral rotation, and the material is pushed by the rotating spiral blade 22 to achieve the conveying purpose; the conveying mechanism using the spiral blade 22 has a simple structure, a small cross-sectional area, good sealing, and is easy to operate and maintain.

[0035] In some embodiments, the spiral blade 22 may be Figures 5 to 8 The structure shown, see Figures 5 to 8 The outer edge of the spiral blade 22 is connected to the inner wall of the discharge pipe 21, and the spiral blade 22 has a through hole 221 that penetrates along its thickness direction and is suitable for allowing liquid to pass through and limiting the passage of stones.

[0036] By adopting the above technical solution, the through hole 221 on the spiral blade 22 can filter out the liquid inside the liquid storage tank 1 when pushing the stone, thereby preventing the liquid inside the liquid storage tank 1 from being transported to the outside.

[0037] In some embodiments, the liquid storage tank 1 can be used as follows Figure 2 , Figure 4 , Figure 6 , Fig. 9 and Fig.10 The structure shown, see Figure 2 , Figure 4 , Figure 6 , Fig. 9 and Fig.10 A discharge port communicating with the interior of the liquid storage tank 1 and facing the secondary crushing assembly 6 is provided on the outer peripheral wall of the liquid storage tank 1 , and the second discharge mechanism includes a mesh plate 31 .

[0038] The mesh plate 31 is hinged on the liquid storage tank 1. The mesh plate 31 is made of stainless steel and is transmission-connected with a transmission member 32 for driving it to swing. The transmission member 32 can adopt a chain transmission mechanism or a belt transmission mechanism to drive the mesh plate 31 to swing around its hinge axis.

[0039] The mesh plate 31 has a first state in which it is swung to the inside of the liquid storage tank 1 , and a second state in which it is swung to the outside of the liquid storage tank 1 through the discharge port.

[0040] When the mesh plate 31 swings from the first state to the second state, the asphalt fragments floating on the liquid surface inside the liquid storage tank 1 can move with the mesh plate 31 to the outside of the liquid storage tank 1 and fall into the secondary crushing assembly 6 .

[0041] By adopting the above technical solution, when the transmission component 32 drives the mesh plate 31 to swing, the mesh plate 31 can swing from the first state to the second state. When swinging, the mesh plate 31 can connect with the asphalt inside the liquid storage tank 1, thereby scooping up the asphalt inside the liquid storage tank 1, and can filter out the concentrated brine when transferring the asphalt. The second discharge mechanism greatly improves the transfer efficiency of the asphalt.

[0042] In some embodiments, the liquid storage tank 1 can be used as follows Figure 6 and Fig. 9 The structure shown, see Figure 6 and Fig. 9 A groove 12 is provided on the inner wall of the liquid storage tank 1 .

[0043] The mesh plate 31 in the first state can partially close the groove 12 , and when the mesh plate 31 swings from the second state to the first state, asphalt fragments floating on the liquid surface inside the liquid storage tank 1 can move with the mesh plate 31 to the inside of the groove 12 .

[0044] By adopting the above technical solution, when the transmission component 32 drives the mesh plate 31 to swing from the second state to the first state, the mesh plate 31 can push the remaining asphalt inside the liquid storage tank 1 into the groove 12, thereby preventing the asphalt from being clamped between the mesh plate 31 and the inner wall of the liquid storage tank 1, thereby affecting the normal swing of the mesh plate 31.

[0045] In some embodiments, the second discharge mechanism may be used as follows: Figure 6 and Fig. 9 The structure shown, see Figure 6 and Fig. 9 The second discharging mechanism also includes a turntable 33.

[0046] The turntable 33 is rotatably disposed in the groove 12 , and is transmission-connected to a second driving motor 331 for driving the turntable 33 to rotate, and the rotation axis of the turntable 33 is perpendicular to the hinge axis of the mesh plate 31 .

[0047] When the second driving motor 331 drives the turntable 33 to rotate, the asphalt fragments are moved through the grooves 12 under the action of centrifugal force to avoid the partial opening of the mesh plate 31 and enter the liquid storage tank 1. The mesh plate 31 swings from the first state to the second state.

[0048] By adopting the above technical solution, when the transmission component 32 drives the mesh plate 31 to swing from the second state to the first state, the mesh plate 31 can push the remaining asphalt inside the liquid storage tank 1 into the groove 12. At the same time, the second drive motor 331 can drive the turntable 33 to rotate, and the dial on the turntable 33 can dial the asphalt entering the groove 12 to the surrounding of the groove 12, so that the asphalt can re-enter the liquid storage tank 1 from the partial opening between the mesh plate 31 and the groove 12, thereby preventing the asphalt from being clamped between the mesh plate 31 and the inner wall of the liquid storage tank 1, thereby affecting the normal swing of the mesh plate 31.

[0049] In some embodiments, the mesh plate 31 may be formed as follows: Figure 2 , Figure 4 , Figure 6 and Fig.10 The structure shown, see Figure 2 , Figure 4 , Figure 6 and Fig.10 The mesh plate 31 has a plurality of convex teeth 311 spaced apart along a straight line direction, and the straight line direction is perpendicular to the hinge axis of the mesh plate 31; the mesh plate 31 also includes a vibration component 312, and the vibration component 312 can be a pneumatic vibration device or an electric vibration device.

[0050] The vibration member 312 is disposed on the liquid storage tank 1 , and is used to generate and transmit vibration to the mesh plate 31 in the second state, so as to separate the asphalt from the mesh plate 31 .

[0051] By adopting the above technical solution, when the transmission component 32 drives the mesh plate 31 to swing from the first state to the second state, the swinging end of the mesh plate 31 is suitable for connecting with the vibration component 312, and at the same time the vibration component 312 is suitable for opening to transmit vibration to the mesh plate 31 in the second state, and the asphalt on the mesh plate 31 will be separated from the mesh plate 31 after being vibrated; the vibration component 312 improves the transfer efficiency of the asphalt.

[0052] In some embodiments, the cooling member 4 may be Figures 1 to 4 The structure shown, see Figures 1 to 4 The cooling component 4 includes two nozzles 41 and a refrigeration device 42.

[0053] The two nozzles 41 are arranged in parallel on both sides of the mesh plate 31 along the rotation axis of the mesh plate 31 , and are both fixedly connected to the liquid storage tank 1 ; the nozzle of each nozzle 41 is arranged toward the liquid surface.

[0054] The refrigeration equipment 42 is used to generate low-temperature gas, and it is connected to the two nozzles 41 through a gas distribution pipe 43 so that the low-temperature gas is transported to the liquid surface through each nozzle; the refrigeration equipment 42 can use an air cooler, which is provided with a refrigeration jacket, and uses liquid nitrogen to reduce the temperature of the gas output by the air cooler.

[0055] By adopting the above technical solution, when the transmission component 32 drives the mesh plate 31 to swing from the inside of the liquid storage tank 1 to above the liquid level in the liquid storage tank 1, the two nozzles 41 are suitable for spraying low-temperature gas, and the low-temperature gas can cool the area above the liquid surface, thereby reducing the temperature of the softened asphalt on the mesh plate 31. When the temperature of the asphalt is reduced, the hardness increases, which is convenient for subsequent crushing processing.

[0056] In some embodiments, the liquid storage tank 1 can be used as follows Figures 4 to 6 The structure shown, see Figures 4 to 6 The liquid storage tank 1 also includes a stirring shaft 13.

[0057] The stirring shaft 13 is rotatably connected to the inside of the liquid storage tank 1; the stirring shaft 13 has a plurality of levers 131, which are arranged on the outer wall of the stirring shaft 13 at circumferential intervals around the stirring shaft 13; the stirring shaft 13 is transmission-connected to a third drive motor 132 for driving it to rotate so as to stir the liquid inside the liquid storage tank 1.

[0058] By adopting the above technical solution, the stirring shaft 13 can rotate around its own axis under the drive of the third drive motor 132. The multiple levers 131 on the stirring shaft 13 can stir the liquid inside the liquid storage tank 1, and then stir the mixture in the liquid, so that the asphalt in the mixture can be fully melted and separated from the stone, avoiding the mixture from sinking too quickly, and ensuring sufficient separation of the asphalt.

[0059] The technical solution adopted in the present application also provides a method for recycling old asphalt pavement materials, based on any of the above-mentioned old asphalt pavement materials recycling devices, comprising the following steps: A. Load the old asphalt pavement material into the primary crushing assembly 5, open the primary crushing assembly 5 to break the old material into pieces, and form an asphalt mixture; wherein the asphalt in the mixture adheres to the stone.

[0060] B. The asphalt mixture is transferred to the liquid storage tank 1, and the liquid is heated to a specific temperature by the heating component 11, so that the asphalt in the mixture melts and floats on the liquid surface, and the stones sink to the bottom.

[0061] C. The stones are transported to the outside of the liquid storage tank 1 through the first discharging mechanism 2.

[0062] D. The asphalt is transported to the secondary crushing assembly 6 through the second discharging mechanism; at the same time, the temperature of the asphalt is lowered by the cooling member 4 to increase the hardness of the asphalt.

[0063] E. Open the secondary crushing assembly 6 to granulate the asphalt into asphalt granules; after drying, the asphalt granules can be bagged and stored for subsequent processing.

[0064] The beneficial effects of the asphalt pavement waste material recycling method provided in this embodiment are the same as the beneficial effects of the aforementioned asphalt pavement waste material recycling device, which will not be repeated here.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An asphalt pavement waste material recycling device, comprising a primary crushing assembly (5) for fragmenting asphalt pavement waste materials, and a secondary crushing assembly (6) for granulating asphalt; characterized in that: A separation component is provided between the primary crushing component (5) and the secondary crushing component (6), and the separation component comprises: A liquid storage tank (1) is used to receive a mixture of fragmented asphalt and stone, and contains a liquid inside the liquid storage tank for causing the asphalt in the mixture to float and the stone in the mixture to sink to the bottom; and a heating member (11) is provided on the liquid storage tank (1) for heating the liquid inside the liquid storage tank; A first discharge mechanism (2) is arranged on the liquid storage tank (1) and is used to discharge the stone material inside the liquid storage tank (1); and A second discharge mechanism is arranged on the liquid storage tank (1) and is in communication with the secondary crushing assembly (6), and is used for discharging the asphalt inside the liquid storage tank (1) to the secondary crushing assembly (6); a cooling component (4) is provided between the second discharge mechanism and the secondary crushing assembly (6), and the cooling component (4) is used for reducing the temperature of the asphalt.

2. The asphalt pavement waste material recycling device according to claim 1, characterized in that: The first discharging mechanism (2) comprises: a discharge pipe (21) arranged outside the liquid storage tank (1), wherein the upper end of the discharge pipe (21) is located above the inner cavity of the liquid storage tank (1) and the lower end is connected to the bottom of the liquid storage tank (1); and The spiral blade (22) is coaxially arranged inside the discharge pipe (21) and is transmission-connected to a first drive motor (23) for driving the spiral blade (22) to rotate, so that the stone inside the discharge pipe (21) moves toward the upper end of the discharge pipe (21).

3. The asphalt pavement waste material recycling device according to claim 2, characterized in that: The outer edge of the spiral blade (22) is connected to the inner wall of the discharge pipe (21), and the spiral blade (22) has a through hole (221) that penetrates along the thickness direction thereof and is suitable for allowing liquid to pass through and restricting the passage of stone.

4. The asphalt pavement waste material recycling device according to claim 1, characterized in that: The outer peripheral wall of the liquid storage tank (1) is provided with a discharge port which is connected to the interior of the liquid storage tank and faces the secondary crushing assembly (6), and the second discharge mechanism comprises: A mesh plate (31) is hingedly connected to the liquid storage tank (1) and is drivingly connected to a transmission member (32) for driving the mesh plate to swing; The mesh plate (31) has a first state in which it swings to the inside of the liquid storage tank (1), and a second state in which it swings to the outside of the liquid storage tank (1) through the discharge port; When the mesh plate (31) swings from the first state to the second state, the asphalt fragments floating on the liquid surface inside the liquid storage tank (1) can move with the mesh plate (31) to the outside of the liquid storage tank (1) and fall into the secondary crushing assembly (6).

5. The asphalt pavement waste material recycling device according to claim 4, characterized in that: A groove (12) is provided on the inner wall of the liquid storage box (1); The mesh plate (31) in the first state is capable of closing a portion of the groove (12), and when the mesh plate (31) swings from the second state to the first state, asphalt fragments floating on the liquid surface inside the liquid storage tank (1) are capable of moving with the mesh plate (31) into the interior of the groove (12).

6. The asphalt pavement waste material recycling device according to claim 5, characterized in that: The second discharging mechanism further comprises: A rotating disk (33) rotatably disposed in the groove (12) and transmission-connected to a second driving motor (331) for driving the rotating disk; When the second drive motor (331) drives the turntable (33) to rotate, the asphalt fragments, under the action of centrifugal force, pass through the grooves (12) and avoid the partial opening of the mesh plate (31), and enter the liquid storage tank (1), and the mesh plate (31) swings from the first state to the second state on a trajectory.

7. The asphalt pavement waste material recycling device according to claim 4, characterized in that: The mesh plate (31) has a plurality of convex teeth (311) arranged at intervals along a straight line direction, and the straight line direction is perpendicular to the hinge axis of the mesh plate (31); the mesh plate (31) further comprises: A vibration component (312) is arranged on the liquid storage tank (1) and is used to generate and transmit vibration to the mesh plate (31) in the second state, so as to separate the asphalt from the mesh plate (31).

8. The asphalt pavement waste material recycling device according to claim 4, characterized in that: The cooling component (4) comprises: Two nozzles (41) are arranged in parallel on both sides of the mesh plate (31) along the rotation axis of the mesh plate (31), and are both fixedly connected to the liquid storage tank (1); the nozzle of each nozzle (41) is arranged toward the liquid surface; and The refrigeration device (42) is used to generate low-temperature gas, and is connected to the two nozzles (41) via a gas distribution pipe (43) so that the low-temperature gas is transported to the liquid surface through each nozzle.

9. The asphalt pavement waste material recycling device according to any one of claims 1 to 8, characterized in that: The liquid storage tank (1) further comprises: A stirring shaft (13) is rotatably connected to the inside of the liquid storage tank (1); the stirring shaft (13) has a plurality of levers (131), and the plurality of levers (131) are arranged on the outer wall of the stirring shaft (13) at intervals in the circumferential direction around the stirring shaft (13); the stirring shaft (13) is drivingly connected to a third drive motor (132) for driving the stirring shaft (13) to rotate, so as to stir the liquid inside the liquid storage tank (1).

10. A method for recycling old asphalt pavement materials, based on the device for recycling old asphalt pavement materials according to any one of claims 1 to 9, characterized in that: The following steps are involved: A. loading the old asphalt pavement material into the primary crushing assembly (5), opening the primary crushing assembly (5) to break the old material into pieces to form an asphalt mixture; B. transferring the asphalt mixture into the liquid storage tank (1), and heating the liquid to a specific temperature through the heating component (11), so that the asphalt in the mixture melts and floats on the liquid surface, while the stones sink to the bottom; C. transporting the stone material to the outside of the liquid storage tank (1) through the first discharge mechanism (2); D. transporting the asphalt into the secondary crushing assembly (6) through the second discharge mechanism; and at the same time, lowering the temperature of the asphalt through the cooling member (4) to increase the hardness of the asphalt; E. Opening the secondary crushing assembly (6) to granulate the asphalt into asphalt pellets.

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