Large-proportion regenerated epoxy asphalt mixture mixing device

Abstract

The utility model relates to the technical field of stirring devices, in particular to a large-proportion regenerated epoxy asphalt mixture stirring device which comprises a batching bin, an elevator, a microwave heating box, a raw material temporary storage bin, a mixing assembly, a stirring cylinder and a finished product material temporary storage bin. The vibration motor is fixed to the outer wall of the batching bin, the replaceable screening plate is installed at the bottom of the batching bin, and the double-track conveyor is connected with the batching bin and the elevator. The microwave heating box comprises a magnetron, a waveguide cover, a circuit system, a quartz heating tube and a temperature sensor, the magnetron and the circuit system are fixed on the box wall through limiting studs, the waveguide cover is mounted on one side of the inner wall of the box, and the quartz heating tube and the temperature sensor are mounted on the periphery in the box. According to the utility model, the recycled asphalt material is heated through the microwave heating box, so that the re-aging and even combustion of old asphalt and the generation of harmful gas are avoided, and the utilization rate and the workability of the old asphalt in the RAP material are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring devices, in particular to a large-proportion recycled epoxy asphalt mixture mixing device. Background Art

[0002] At present, there is a large amount of asphalt pavement in my country, and a large amount of RAP materials are produced during annual maintenance. How to improve the utilization rate of RAP materials is one of the research hotspots of scholars at home and abroad. However, the current traditional recycling scheme still has a series of problems such as low utilization rate of RAP materials (mixing amount 20%~30%), low application grade, and unstable road performance. The main reasons are: (1) In order to avoid further aging of RAP materials and the generation of harmful gases, the heating of RAP materials usually cannot exceed 130℃, which makes it difficult to utilize the old asphalt in RAP materials, and the mixing amount is also limited, usually not exceeding 30%; (2) RAP materials have diverse sources, and the particle size variability after milling and crushing is large, and the quality is unstable, which limits the effective utilization of RAP materials.

[0003] In response to the above problems, some scholars have proposed the epoxy full recycling scheme, which uses the low viscosity, strong bonding performance and excellent road performance of epoxy asphalt before curing to solve the problems of medium-temperature mixing, large variability and unstable quality of RAP materials, and realize the full recycling of RAP materials. However, the epoxy full recycling scheme still cannot solve the problem of low utilization rate of RAP materials at 130°C. In addition, the epoxy full recycling scheme is still in the test stage, lacking a dedicated fully recycled epoxy asphalt mixture production and mixing device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a large-proportion recycled epoxy asphalt mixture mixing device to effectively solve the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a large-proportion recycled epoxy asphalt mixture mixing device, including: a batching bin, an elevator, a microwave heating box, a raw material temporary storage bin, a mixing component, a mixing tank and a finished material temporary storage bin,

[0006] The batching bin comprises a vibration motor, a replaceable screening plate and a double-track conveyor, wherein the vibration motor is fixed to the outer wall of the batching bin, the replaceable screening plate is installed at the bottom of the batching bin, and the double-track conveyor connects the batching bin and the elevator;

[0007] The microwave heating box comprises a magnetron, a waveguide cover, a circuit system, a quartz heating tube and a temperature sensor. The magnetron and the circuit system are fixed to the box wall by limiting bolts, the waveguide cover is installed on one side of the inner wall of the box, and the quartz heating tube and the temperature sensor are installed around the box.

[0008] Furthermore, the mixing assembly includes a stirring impeller, a rotating shaft and a cleaning spray assembly, wherein the rotating shaft is fixed in the middle of the mixing assembly, the stirring impeller is mounted on the surface of the rotating shaft, and the cleaning spray assembly is fixed at the bottom center of the mixing assembly.

[0009] Furthermore, the delivery pipe connects the mixing assembly and the component A storage tank and the component B storage tank, the liquid outlet pipe connects the mixing assembly and the stirring tank, and the raw material temporary storage bin connects the microwave heating box and the stirring tank.

[0010] Furthermore, the power of the vibration motor is 10-15kw.

[0011] Furthermore, the heating temperature of the microwave heating box is controlled at 150° C.-180° C., and the heating time is controlled at 5-15 min.

[0012] Furthermore, the wavelength of the quartz heating tube is selected as a medium-long wave quartz heating tube, and the wavelength is 2um-10um; copper or titanium is sprayed on part of the outer wall of the quartz heating tube.

[0013] Furthermore, a weighing and metering component is provided in the raw material temporary storage bin.

[0014] Furthermore, the cleaning liquid in the cleaning spray assembly is an organic solvent.

[0015] Furthermore, the mixing cylinder is provided with a plurality of mixing heads, and the mixing cylinder is provided with a plurality of scrapers.

[0016] Furthermore, the finished material temporary storage bin is provided with a heating device for heating and keeping the finished materials warm, and the heating temperature is controlled at 140°C to 170°C.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model heats the recycled asphalt material through a microwave heating box, replacing the traditional high-temperature heating mode of combustion, avoiding the re-aging and even combustion of the old asphalt and the generation of harmful gases. The old material can be quickly and evenly heated to 150°C~180°C, greatly improving the utilization rate and workability of the old asphalt in the RAP material.

[0019] 2. The utility model can preliminarily grade the RAP material by vibrating and screening the old material in the batching bin, reduce the influence of the gradation variability of the old material on the performance of the recycled asphalt mixture, and improve the uniformity of the recycled asphalt mixture. In addition, the vibration screening method also reduces the influence of the agglomeration of fine aggregates in the RAP material under high temperature, further improving the mixing uniformity of the mixture.

[0020] 3. The utility model realizes premixing of two components of epoxy resin by setting a mixing assembly, thereby improving the dispersion uniformity of epoxy resin in the recycled asphalt mixture and further improving the road performance of the mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of a large-proportion recycled epoxy asphalt mixture mixing device in an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the microwave heating box in the utility model.

[0024] Figure numerals: 1. batching bin; 2. elevator; 3. microwave heating box; 4. temporary storage bin for raw materials; 5. mixing component; 6. mixing tank; 7. temporary storage bin for finished products; 8. vibration motor; 9. replaceable screening plate; 10. double-track conveyor; 11. conveying pipe; 12. rotating shaft; 13. stirring impeller; 14. cleaning spray component; 15. liquid outlet pipe; 16. scraper; 17. heating component; 18. weighing and metering component; 19. stirring head; 20. A component storage tank; 21. B component storage tank; 301. circuit system; 302. magnetron; 303. waveguide cover; 304. quartz heating tube; 305. temperature sensor; 306. limit bolt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 1 to Figure 2 The large-proportion recycled epoxy asphalt mixture mixing device shown includes: a batching bin 1, an elevator 2, a microwave heating box 3, a raw material temporary storage bin 4, a mixing component 5, a mixing cylinder 6 and a finished product temporary storage bin 7. The batching bin includes a vibration motor 8, a replaceable screening plate 9 and a double-track conveyor 10. The replaceable screening plate 9 is installed at the bottom of the batching bin 1, and can vibrate and screen the old material and adjust the screening particle size range. The double-track conveyor 10 connects the batching bin 1 and the elevator 2. The microwave heating box 3 includes a magnetron 302, a waveguide cover 303, a circuit system 301, a quartz heating tube 304 and a temperature sensor 305. Energy is transferred to the inner wall of the box through the waveguide cover 303. The magnetron 302 and the circuit system 301 are fixed to the box wall by limit bolts 306. The quartz heating tube 304 and the temperature sensor 305 are installed around the box by screws.

[0029] The working materials and use process of the utility model are as follows: the old materials are put into the batching bin 1, the suitable replaceable screening plate 9 is selected, the old materials are vibrated and screened by the vibration motor 8, the two-stage materials after screening are transported to the elevator 2 by the double-track conveyor 10, and the old materials enter the microwave heating box 3 for heating; the magnetron 302 in the microwave heating box 3 generates heat, and the energy is transferred to the quartz heating tube 304 through the waveguide cover 303, and the quartz heating tube 304 heats the old materials, and the heating time is controlled at 5-15min, and the temperature is controlled at 150℃-180℃. The temperature sensor 305 monitors the temperature; while the old material is heated, the epoxy resin enters the mixing component 5 from the A component storage tank 20 and the B component storage tank 21 through the delivery pipe 11 for pre-mixing, and then passes through the liquid outlet pipe 15 to the mixing tank 6; after the old material and the epoxy resin are transported to the mixing tank 6, they are mixed evenly through the stirring head 19, and then enter the finished material temporary storage bin 7, and are heated and kept warm. The heating temperature is controlled at 140°C-170°C, and finally the cleaning spray component 14 in the mixing component 5 cleans the inside of the box, and the scraper 16 in the mixing tank 6 cleans the inside of the box.

[0030] In the present invention, the mixing assembly 5 includes a stirring impeller 13, a rotating shaft 12 and a cleaning spray assembly 14. The rotating shaft 12 is fixed in the middle of the mixing assembly 5, the stirring impeller 13 is installed on the surface of the rotating shaft 12, and the cleaning spray assembly 14 is fixed in the center of the bottom of the mixing assembly 5. By arranging the stirring impeller 13, the rotating shaft 12 and the cleaning spray assembly 14, the epoxy resin can be pre-mixed, the epoxy asphalt mixture can be mixed more evenly through the mixing assembly 5, and the epoxy resin remaining on the inner wall of the mixing assembly 5 can be cleaned by the cleaning spray assembly 14.

[0031] In this solution, the delivery pipe 11 connects the mixing assembly 5 and the component A storage tank 20 and the component B storage tank 21, the liquid outlet pipe 15 connects the mixing assembly 5 and the stirring tank 6, and the raw material temporary storage bin 4 connects the microwave heating box 3 and the stirring tank 6.

[0032] In this solution, the power of the vibration motor is 10-15kw, and the particle size of the replaceable sieve plate is 4.75mm and 9.5mm. The heating temperature of the microwave heating box is controlled at 150℃~180℃, and the heating time is controlled at 5-15min. The wavelength of the quartz heating tube selects medium and long wave quartz heating tubes with a wavelength of 2um-10um. The medium and long wave quartz heating tubes have the characteristics of high heating efficiency and stable temperature field; some parts of the outer wall of the quartz heating tube are sprayed with heavy metals such as copper or titanium to form a directional reflection layer, so that more heat can be transferred to the heated object in a directionally manner, further improving the overall heating effect and reducing energy waste.

[0033] In this solution, a weighing and metering component 18 is provided in the raw material temporary storage bin 4 to control the quality of the mixed material entering the mixing tank. The cleaning liquid in the cleaning spray component 14 is an organic solvent, which is used to clean the epoxy resin solution remaining on the inner wall of the device. The mixing tank 6 has multiple stirring heads 19 to further improve the uniformity of the mixing of the mixed material. Multiple scrapers 16 are installed around the mixing tank 6 to clean the inner wall of the mixing tank 6 and further ensure the cleanliness of the mixing tank 6 after use. The finished material temporary storage bin 7 is provided with a heating component 17 to heat and keep the finished material warm. The heating temperature is controlled at 140°C~170°C to ensure the construction and workability of the mixed material.

[0034] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle 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 are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-proportion recycled epoxy asphalt mixture mixing device, comprising: The batching bin (1), the elevator (2), the microwave heating box (3), the raw material temporary storage bin (4), the mixing assembly (5), the stirring tank (6) and the finished product temporary storage bin (7) are characterized by: The batching bin (1) comprises a vibration motor (8), a replaceable screen plate (9) and a double-track conveyor (10), wherein the vibration motor (8) is fixed to the outer wall of the batching bin (1), the replaceable screen plate (9) is installed at the bottom of the batching bin (1), and the double-track conveyor (10) connects the batching bin (1) and the elevator (2); The microwave heating box (3) comprises a magnetron (302), a waveguide cover (303), a circuit system (301), a quartz heating tube (304) and a temperature sensor (305); the magnetron (302) and the circuit system (301) are fixed to the box wall via limit bolts (306); the waveguide cover (303) is installed on one side of the inner wall of the box; and the quartz heating tube (304) and the temperature sensor (305) are installed around the box.

2. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The mixing assembly (5) comprises a stirring impeller (13), a rotating shaft (12) and a cleaning spray assembly (14); the rotating shaft (12) is fixed at the middle of the mixing assembly (5); the stirring impeller (13) is mounted on the surface of the rotating shaft (12); and the cleaning spray assembly (14) is fixed at the bottom center of the mixing assembly (5).

3. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The delivery pipe (11) connects the mixing assembly (5) and the A component storage tank (20) and the B component storage tank (21); the liquid outlet pipe (15) connects the mixing assembly (5) and the stirring tank (6); and the raw material temporary storage bin (4) connects the microwave heating box (3) and the stirring tank (6).

4. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The power of the vibration motor (8) is 10-15kw.

5. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The heating temperature of the microwave heating box (3) is controlled at 150° C.-180° C., and the heating time is controlled at 5-15 minutes.

6. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The wavelength of the quartz heating tube (304) is a long-wave quartz heating tube with a wavelength of 2um-10um; and copper or titanium is sprayed on a part of the outer wall of the quartz heating tube (304).

7. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: A weighing and metering component (18) is provided in the raw material temporary storage bin (4).

8. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 2 is characterized in that: The cleaning liquid in the cleaning spray assembly (14) is an organic solvent.

9. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1 is characterized in that: The stirring cylinder (6) is provided with a plurality of stirring heads (19), and the stirring cylinder (6) is provided with a plurality of scrapers (16).

10. The large-proportion recycled epoxy asphalt mixture mixing device according to claim 1, characterized in that: The finished product temporary storage bin (7) is provided with a heating component (17), and the heating temperature is controlled at 140° C. to 170° C.

Images