Plant-mixed hot recycled asphalt mixture layered mixing device
By combining a spiral mixing shaft with a servo motor, along with the design of a fixed block, a movable rod, and a toggle block, the problem of uneven mixing of recycled asphalt mixtures is solved, achieving uniform mixing and thorough blending of recycled asphalt mixtures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MIANYANG CHUANJIAO HIGHWAY PLANNING SURVEY & DESIGN CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-05-26
AI Technical Summary
Existing plant-mixed hot recycled asphalt mixture layered mixing equipment has the problem of uneven mixing of recycled asphalt mixture.
The design employs a spiral stirring shaft in conjunction with a servo motor, along with a fixed block, a movable rod, and a toggle block. The spiral stirring shaft conveys the material in layers, while the toggle block disperses the layers. Combined with a guide plate, the material is guided to achieve thorough mixing.
This process achieves uniform mixing of recycled asphalt mixtures, improves the fluidity and mixing effect of the materials, and ensures that each layer of materials is fully mixed.
Smart Images
Figure CN224280946U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of layered mixing technology for recycled asphalt mixtures, and in particular to a layered mixing device for hot recycled asphalt mixtures from a plant. Background Technology
[0002] The plant-mixed hot recycled asphalt mixture stratified mixing device is a special mixing structure designed for the graded mixing of recycled asphalt pavement materials and new materials due to temperature differences. Its core design is to achieve the gradient fusion of new and old materials through physical separation or time-sharing mixing.
[0003] Existing plant-mixed hot recycled asphalt mixture stratified mixing equipment typically has a single mixing shaft inside to mix the recycled asphalt mixture. However, recycled asphalt mixture has a certain degree of adhesion, which can easily lead to uneven stratified mixing of the recycled asphalt mixture. Utility Model Content
[0004] Therefore, it is necessary to provide a plant-mixed hot recycled asphalt mixture stratified mixing device to address the problem of uneven stratified mixing of recycled asphalt mixtures.
[0005] The device includes: a mixing tank; a layered mixing mechanism, wherein the layered mixing mechanism includes a spiral mixing shaft rotatably connected to the top wall of the mixing tank, the top end of the spiral mixing shaft penetrating the mixing tank and fixedly connected to a servo motor, a fixed block fixedly connected to the upper surface of the spiral mixing shaft, movable rods rotatably connected to both sides of the inner wall of the fixed block, and annularly distributed actuating blocks fixedly connected to the surface of the movable rods, the bottom of the actuating blocks forming an angle with the horizontal plane.
[0006] In one embodiment, a guide plate is fixedly connected to the surface of the spiral stirring shaft, and one side of the guide plate contacts the inner wall of the mixing tank.
[0007] In one embodiment, a first gear is fixedly connected to the top of the movable rod, and a second gear is fixedly connected to the inner top wall of the mixing tank, with the first gear meshing with the second gear.
[0008] In one embodiment, a support block is fixedly connected to the bottom of the actuating block, and the bottom of the support block is fixedly connected to the surface of the movable rod. By fixing the support block to the surfaces of the actuating block and the movable rod, a triangular support is formed, thereby improving the overall rigidity of the actuating block and reducing the risk of breakage of the actuating block in the mixing of asphalt mixture.
[0009] In one embodiment, a diagonal rod is fixedly connected to the surface of the guide plate, and the bottom end of the diagonal rod is fixedly connected to the surface of the spiral mixing shaft. The diagonal rod, fixed to the surfaces of the guide plate and the spiral mixing shaft, forms a triangular support, thereby improving the overall rigidity of the guide plate and reducing the risk of breakage during the mixing of asphalt mixtures.
[0010] In one embodiment, a dustproof cylinder is fixedly connected to the inner top wall of the mixing tank, and both the first gear and the second gear are located inside the dustproof cylinder.
[0011] In one embodiment, a dust cover is fixedly connected to the top of the fixed block, the upper surface of the movable rod is rotatably connected to the inner wall of the dust cover, and the surface of the dust cover is slidably connected to the inner wall of the dust cylinder. Through the cooperation of the dust cylinder and the dust cover, the first gear and the second gear are protected, preventing impurities from adhering to their surfaces and reducing wear between them.
[0012] In one embodiment, the surface of the guide plate is curved into an arc shape, and the surface of the servo motor is fixedly connected to the top of the mixing tank.
[0013] Beneficial effects
[0014] 1. By cooperating with the spiral mixing shaft and the servo motor, the material at the bottom of the mixing tank is transported to the top of the mixing tank, thereby completing the layered mixing of the material in the mixing tank. By cooperating with the fixed block, the movable rod and the actuating block, some of the material on the spiral mixing shaft is broken up into layers, thereby making each layer of material fully mixed, thus ensuring the uniformity of the layered mixing of the recycled asphalt mixture.
[0015] 2. The rotating guide plate guides the material located near the inner wall of the mixing tank to the middle of the mixing tank, thereby improving the fluidity of the material inside the mixing tank, so as to fully mix and heat the material inside the mixing tank. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a cross-sectional view of the mixing tank of this utility model;
[0019] Figure 3 This is an exploded view of the layered stirring mechanism of this utility model;
[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;
[0021] Figure 5 This is a schematic diagram of the layered stirring mechanism of this utility model.
[0022] Figure label:
[0023] 100. Mixing tank; 200. Layered mixing mechanism; 201. Spiral mixing shaft; 202. Servo motor; 203. Fixed block; 204. Movable rod; 205. Actuating block; 206. Guide plate; 207. Second gear; 208. First gear; 209. Dust cover; 210. Dustproof cylinder; 211. Support block; 212. Inclined rod. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0025] The following is combined with Figures 1-5 This invention describes a layered mixing device for plant-mixed hot recycled asphalt mixtures.
[0026] In one embodiment, a plant-mixed hot recycled asphalt mixture stratified mixing device includes: a mixing tank 100; a stratified mixing mechanism 200, the stratified mixing mechanism 200 including a spiral mixing shaft 201 rotatably connected to the inner top wall of the mixing tank 100, the top end of the spiral mixing shaft 201 penetrating the mixing tank 100 and fixedly connected to a servo motor 202, a fixed block 203 fixedly connected to the upper surface of the spiral mixing shaft 201, movable rods 204 rotatably connected to both sides of the inner wall of the fixed block 203, and annularly distributed actuating blocks 205 fixedly connected to the surface of the movable rods 204, the bottom of the actuating blocks 205 forming an angle with the horizontal plane.
[0027] The mixing tank 100 includes a cylinder and a cover. The surface of the servo motor 202 is fixedly connected to the top of the cover. The upper surface of the spiral stirring shaft 201 is rotatably connected to the inner top wall of the cover. An electric heater is embedded in the inner wall of the cylinder. The surface of the cylinder is connected to a feed hopper. The lower end of the surface of the cylinder is funnel-shaped. A solenoid valve is embedded in the lower end of the surface of the cylinder. A mounting bracket is fixedly connected to the surface of the cylinder. A PLC controller is installed at the front end of the mounting bracket.
[0028] Temperature sensors are usually installed on the inner wall of the cylinder, and current sensors are usually installed on the inner wall of the spiral stirring shaft 201. These sensors monitor the operating parameters of the equipment in real time and feed the data back to the control system so as to detect abnormalities and make adjustments in a timely manner. These are common and well-known technologies in the field and are not closely related to the technical problems of this application. Therefore, they have not been described in detail.
[0029] In this embodiment, when the recycled asphalt mixture needs to be stirred, the PLC controller is operated to turn on the electric heater and servo motor 202. First, a portion of the heated new aggregate is fed into the mixing tank 100 through the feed hopper and dry-mixed for 5 to 10 seconds to further disperse and preheat the aggregate during the stirring process. Then, the preheated RAP and an appropriate amount of recycling agent are added in layers and stirred for 15 to 30 seconds to allow the recycling agent to fully contact the old asphalt in the RAP, soften the old asphalt, and restore its properties. Finally, the new asphalt and the remaining new aggregate are added.
[0030] The output shaft of the servo motor 202 rotates, driving the spiral stirring shaft 201 to rotate. The rotation of the spiral stirring shaft 201 drives the fixed block 203 to rotate. The rotating spiral stirring shaft 201 guides the material at the bottom of the mixing tank 100 to the upper middle part of the mixing tank 100 for stratified mixing. The rotation of the fixed block 203 drives the two movable rods 204 to move in a ring. The ring movement of the movable rods 204 drives the agitator block 205 to move in a ring, thus stirring the material inside the mixing tank 100.
[0031] After mixing for a period of time to ensure the recycled asphalt mixture is fully mixed, the PLC controller is operated to open the solenoid valve at the lower end of the surface of the mixing tank 100, so that the recycled asphalt mixture in the mixing tank 100 is discharged into the transport vehicle or storage tank.
[0032] like Figure 5 As shown, a guide plate 206 is fixedly connected to the surface of the spiral stirring shaft 201. One side of the guide plate 206 contacts the inner wall of the mixing tank 100. The surface of the guide plate 206 is curved into an arc shape. The surface of the servo motor 202 is fixedly connected to the top of the mixing tank 100.
[0033] In this embodiment, the rotation of the spiral stirring shaft 201 drives the guide plate 206 to move in a ring within the mixing tank 100. Because the surface of the guide plate 206 is curved into an arc shape, the guide plate 206, which is moving in a ring, guides the material near the inner wall of the mixing tank 100 to the vicinity of the spiral stirring shaft 201.
[0034] like Figure 3-4As shown, a first gear 208 is fixedly connected to the top of the movable rod 204, and a second gear 207 is fixedly connected to the inner top wall of the mixing tank 100. The first gear 208 and the second gear 207 mesh with each other. A dustproof cylinder 210 is fixedly connected to the inner top wall of the mixing tank 100. Both the first gear 208 and the second gear 207 are located inside the dustproof cylinder 210. A dustproof cover 209 is fixedly connected to the top of the fixed block 203. The upper surface of the movable rod 204 is rotatably connected to the inner wall of the dustproof cover 209, and the surface of the dustproof cover 209 is slidably connected to the inner wall of the dustproof cylinder 210.
[0035] In this embodiment, the movable rod 204 moves in a ring, causing the dust cover 209 to slide in a ring on the dust cylinder 210 and causing the first gear 208 to move in a ring on the surface of the second gear 207. The first gear 208 moves in a ring on the surface of the second gear 207. Since the first gear 208 and the second gear 207 are meshed, the first gear 208 rotates in the ring movement, which in turn causes the movable rod 204 and the agitator block 205 to rotate in the ring movement. The rotating agitator block 205 separates some of the material on the spiral stirring shaft 201 into layers.
[0036] like Figure 4 As shown, a support block 211 is fixedly connected to the bottom of the agitator block 205, and the bottom of the support block 211 is fixedly connected to the surface of the movable rod 204. An inclined rod 212 is fixedly connected to the surface of the guide plate 206, and the bottom end of the inclined rod 212 is fixedly connected to the surface of the spiral stirring shaft 201.
[0037] It should be noted that the spiral mixing shaft 201, fixed block 203, movable rod 204, actuating block 205, second gear 207, first gear 208, dust cover 209, dust cylinder 210, support block 211, and inclined rod 212 are all W18Cr4V alloy steel components, possessing high strength, toughness, wear resistance, and high temperature resistance. The W18Cr4V alloy steel components of the spiral mixing shaft 201, fixed block 203, movable rod 204, actuating block 205, second gear 207, first gear 208, dust cover 209, dust cylinder 210, support block 211, and inclined rod 212 are better suited to the harsh working conditions within the asphalt mixing tank 100.
[0038] During the mixing process, the first gear 208 and the second gear 207 are easily subjected to large frictional and impact forces. The first gear 208 and the second gear 207 of the W18Cr4V alloy steel component can withstand these forces, reduce wear and fatigue damage, and extend the service life of the first gear 208 and the second gear 207.
[0039] Working principle: The output shaft of the servo motor 202 rotates, driving the spiral stirring shaft 201 and the fixed block 203 to rotate. The rotating spiral stirring shaft 201 guides the material at the bottom of the mixing tank 100 to the upper middle part of the mixing tank 100 for stratified stirring. The rotation of the fixed block 203 drives the movable rod 204, the actuating block 205 and the first gear 208 to move in a ring. The first gear 208 moves in a ring on the surface of the second gear 207, causing the first gear 208 to rotate in the ring movement. This, in turn, causes the movable rod 204 and the actuating block 205 to rotate in the ring movement. The rotating actuating block 205 breaks up some of the material on the spiral stirring shaft 201 in layers, thus stirring the material inside the mixing tank 100.
[0040] It should be noted that the mixing tank 100, servo motor 202, spiral mixing shaft 201, second gear 207, first gear 208, PLC controller, solenoid valve, and electric heater mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the servo motor 202, PLC controller, solenoid valve, and electric heater can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.
[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A layered mixing device for plant-mixed hot recycled asphalt mixtures, characterized in that, include: Mixing tank (100); A layered stirring mechanism (200) includes a spiral stirring shaft (201) rotatably connected to the top wall of the mixing tank (100). The top end of the spiral stirring shaft (201) passes through the mixing tank (100) and is fixedly connected to a servo motor (202). A fixed block (203) is fixedly connected to the upper surface of the spiral stirring shaft (201). Movable rods (204) are rotatably connected to both sides of the inner wall of the fixed block (203). A ring-shaped actuating block (205) is fixedly connected to the surface of the movable rod (204). The bottom of the actuating block (205) forms an angle with the horizontal plane.
2. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 1, characterized in that, A guide plate (206) is fixedly connected to the surface of the spiral stirring shaft (201), and one side of the guide plate (206) contacts the inner wall of the mixing tank (100).
3. The layered mixing device for hot recycled asphalt mixtures according to claim 1, characterized in that, The top of the movable rod (204) is fixedly connected to a first gear (208), and the inner top wall of the mixing tank (100) is fixedly connected to a second gear (207). The first gear (208) and the second gear (207) mesh with each other.
4. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 1, characterized in that, The bottom of the actuating block (205) is fixedly connected to a support block (211), and the bottom of the support block (211) is fixedly connected to the surface of the movable rod (204).
5. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 2, characterized in that, The surface of the guide plate (206) is fixedly connected to a slant rod (212), and the bottom end of the slant rod (212) is fixedly connected to the surface of the spiral stirring shaft (201).
6. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 3, characterized in that, The inner top wall of the mixing tank (100) is fixedly connected to a dustproof cylinder (210), and the first gear (208) and the second gear (207) are both located inside the dustproof cylinder (210).
7. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 6, characterized in that, The top of the fixed block (203) is fixedly connected to a dust cover (209), the upper surface of the movable rod (204) is rotatably connected to the inner wall of the dust cover (209), and the surface of the dust cover (209) is slidably connected to the inner wall of the dust cylinder (210).
8. The plant-mixed hot recycled asphalt mixture layered mixing device according to claim 2, characterized in that, The surface of the guide plate (206) is curved into an arc shape, and the surface of the servo motor (202) is fixedly connected to the top of the mixing tank (100).