Asphalt mixture production system

Abstract

The utility model discloses an asphalt mixture production system, which comprises a first wet grinding device, a second wet grinding device, a third wet grinding device and a fourth wet grinding device, the second wet grinding equipment is used for grinding and mixing the coarse aggregate and the asphalt into a second mixture comprising the fine aggregate and the asphalt; the third wet grinding equipment is used for grinding and mixing the fine aggregate and the asphalt into a third mixture comprising fine filler and the asphalt; and the mixing equipment is used for mixing the asphalt, the additive, the first mixture output by the first wet grinding equipment, the second mixture output by the second wet grinding equipment and the third mixture output by the third wet grinding equipment to obtain the asphalt mixture. The asphalt mixture production system is simple in structure, low in equipment investment and operation cost, more energy-saving and environment-friendly, capable of remarkably improving the mixing effect of the asphalt mixture and improving the pavement construction quality and efficiency, and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixtures, in particular to an asphalt mixture production system. Background Art

[0002] Asphalt mixture is a composite material composed of aggregate, asphalt and some additives. Its composition ratio and mixing effect have an important influence on the performance of the road surface. Among them, aggregate is the main component that bears vehicle load. Its particle size distribution, strength and surface properties directly affect the stability and durability of the mixture. Reasonable combination of coarse and fine aggregates can improve the density and deformation resistance of the mixture. Asphalt is an adhesive that acts as a bonding agent. Its content and performance determine the strength, flexibility and crack resistance of the mixture. The right amount of asphalt is beneficial to improve the fatigue resistance and impact resistance of the mixture. Some additives such as modifiers and anti-aging agents can improve the characteristics of asphalt mixtures and improve their applicability. For example, adding fibers can improve crack resistance, and adding fly ash can increase compressive strength.

[0003] The performance of asphalt mixture has a significant impact on the mechanical properties and durability of the pavement after paving. First, the asphalt mixture should have good density and stability to improve the road's ability to resist deformation and reduce common problems such as rutting and bulging. Secondly, the asphalt mixture should have good fatigue resistance and impact resistance to enhance the road's bearing capacity and extend its service life. In addition, the asphalt mixture should also have good crack resistance and aging resistance to improve the road's ability to resist cracking and environmental aging.

[0004] Fully mixing aggregate, asphalt and additives to form a dense and uniform composite structure is conducive to improving the overall performance of asphalt mixture. At present, the mixing effect of aggregate, asphalt and additives is mainly improved by adjusting the proportion of components of asphalt mixture and improving the structure of mixer, but the improvement on the mixing effect is small. Utility Model Content

[0005] The main purpose of the utility model is to provide an asphalt mixture production system to solve the technical problem of poor mixing effect of asphalt mixture in the prior art.

[0006] In order to achieve the above purpose, the utility model provides an asphalt mixture production system, and the technical scheme is as follows:

[0007] The asphalt mixture production system includes: a first wet grinding device for grinding and mixing mineral material and asphalt into a first mixture including coarse aggregate and asphalt; a second wet grinding device for grinding and mixing coarse aggregate and asphalt into a second mixture including fine aggregate and asphalt; a third wet grinding device for grinding and mixing fine aggregate and asphalt into a third mixture including fine filler and asphalt; and a mixing device for mixing asphalt, additives, the first mixture output by the first wet grinding device, the second mixture output by the second wet grinding device, and the third mixture output by the third wet grinding device, so as to obtain an asphalt mixture.

[0008] As a further improvement of the above-mentioned asphalt mixture production system: the first wet grinding equipment is a rotor grinder; the second wet grinding equipment and the third wet grinding equipment are ball mills.

[0009] As a further improvement of the above-mentioned asphalt mixture production system: the discharge port of the first wet grinding equipment is connected to the second wet grinding equipment and the mixing equipment through a two-division pipeline.

[0010] As a further improvement of the above-mentioned asphalt mixture production system: the discharge port of the second wet grinding equipment is connected to the third wet grinding equipment and the mixing equipment through two branch pipelines.

[0011] As a further improvement of the above-mentioned asphalt mixture production system: an inclined filter is provided at the lower part of the agitator inside the shell of the mixing equipment, a conical asphalt mixture discharge port is opened on the shell below the filter, and a discharge port is opened on the shell at the lower end of the filter.

[0012] As a further improvement of the above-mentioned asphalt mixture production system: a vibrating device for vibrating the filter screen is provided on the shell of the mixing equipment.

[0013] As a further improvement of the above-mentioned asphalt mixture production system: it also includes an asphalt storage tank, which is connected to the asphalt inlets of the first wet grinding equipment, the second wet grinding equipment, the third wet grinding equipment and the mixing equipment through a four-branch pipeline.

[0014] As a further improvement of the above-mentioned asphalt mixture production system: it also includes an exhaust gas treatment device, which is connected to the exhaust gas outlets of the first wet grinding device, the second wet grinding device, the third wet grinding device and the mixing device through a four-branch pipeline.

[0015] As a further improvement of the above-mentioned asphalt mixture production system: the exhaust gas treatment equipment includes a condensing device, which is used to condense the exhaust gas and output a solid-liquid mixture, and the solid-liquid mixture flows back to the mixing equipment through a reflux pipe.

[0016] As a further improvement of the above-mentioned asphalt mixture production system: the exhaust gas treatment equipment also includes an activated carbon adsorption device, and the activated carbon adsorption device is used to adsorb the non-condensable exhaust gas output by the condensation device.

[0017] It can be seen that the utility model has the following advantages:

[0018] (1) First, the mineral material and asphalt are uniformly mixed together through the process of grinding and mixing in the first wet grinding equipment to form a first mixture containing coarse aggregate, and then the coarse aggregate and asphalt are further ground and mixed in the second wet grinding equipment to form a second mixture containing fine aggregate, and then the fine aggregate and asphalt are further finely ground and mixed in the third wet grinding equipment to form a third mixture containing fine filler. Therefore, using asphalt as the grinding medium can make the aggregate surface smoother and cleaner, thereby improving the bonding between asphalt and aggregate; grinding the mineral material step by step through the three-stage wet grinding equipment to obtain the same source of coarse aggregate, fine aggregate and fine filler can better control the particle size distribution and surface properties of the aggregate, which is beneficial to improve the bonding between asphalt and aggregate and enhance the overall strength.

[0019] (2) In the process of wet grinding, the coarse aggregate, fine aggregate and fine filler are not only gradually coated with asphalt on the surface, but the asphalt can also penetrate into the pores of the aggregate. This helps to improve the bonding and mixing efficiency between asphalt and aggregate when mixed with asphalt and additives in the mixing equipment, thereby improving the various properties of the asphalt mixture, such as density, durability and strength characteristics, and ensuring that the performance indicators of the asphalt mixture are stable and reliable.

[0020] (3) The wet grinding method is used to crush and refine the mineral materials step by step, which can effectively reduce dust pollution, has relatively low energy consumption, is more energy-saving and environmentally friendly, and can better control and supervise the quality of aggregates and reduce the cost of purchasing from outside.

[0021] It can be seen that the asphalt mixture production system of the utility model has a simple structure, low equipment investment and operating costs, is more energy-saving and environmentally friendly, can significantly improve the mixing effect of the asphalt mixture, improve the quality and efficiency of road construction, and has strong practicality.

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present invention are used to assist the understanding of the present invention. The contents provided in the drawings and their related descriptions in the present invention can be used to explain the present invention, but do not constitute an improper limitation on the present invention.

[0024] In the attached picture:

[0025] Figure 1 It is a structural schematic diagram of an embodiment of an asphalt mixture production system of the utility model.

[0026] The relevant marks in the above drawings are:

[0027] 100-first wet grinding equipment, 200-second wet grinding equipment, 300-third wet grinding equipment, 400-mixing equipment, 410-filter screen, 420-discharge port, 430-discharge port, 440-vibrating device, 500-asphalt storage tank, 610-condensing device, 620-activated carbon adsorption device. DETAILED DESCRIPTION

[0028] The utility model is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the utility model based on these descriptions. Before describing the utility model in conjunction with the accompanying drawings, it should be particularly noted that:

[0029] The technical solutions and technical features provided in each part of the utility model, including the following description, can be combined with each other if there is no conflict.

[0030] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] About the terms and units in the present invention: The terms "include", "have" and any variations thereof in the specification and claims of the present invention and related parts are intended to cover non-exclusive inclusions.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of an asphalt mixture production system of the utility model.

[0033] like Figure 1As shown, the asphalt mixture production system includes a first wet grinding device 100, a second wet grinding device 200, a third wet grinding device 300, a mixing device 400, an asphalt storage tank 500 and an exhaust gas treatment device. The first wet grinding device 100 is used to grind and mix the mineral material and asphalt into a first mixture including coarse aggregate and asphalt. The second wet grinding device 200 is used to grind and mix the coarse aggregate and asphalt into a second mixture including fine aggregate and asphalt. The third wet grinding device 300 is used to grind and mix the fine aggregate and asphalt into a third mixture including fine filler and asphalt. The mixing device 400 is used to mix asphalt, additives, the first mixture output from the first wet grinding device 100, the second mixture output from the second wet grinding device 200 and the third mixture output from the third wet grinding device 300, that is, to obtain an asphalt mixture.

[0034] The first wet grinding device 100 is a rotor grinder, and the second wet grinding device 200 and the third wet grinding device 300 are ball mills. Such a combination may achieve lower energy consumption and better grinding efficiency.

[0035] The discharge port 420 of the first wet grinding device 100 is connected to the second wet grinding device 200 and the mixing device 400 through two branch pipes, so that the coarse aggregate raw materials used by the second wet grinding device 200 directly come from the first mixture. The discharge port 420 of the second wet grinding device 200 is connected to the third wet grinding device 300 and the mixing device 400 through two branch pipes, so that the fine aggregate raw materials used by the third wet grinding device 300 directly come from the second mixture.

[0036] The lower part of the agitator inside the housing of the mixing equipment 400 is provided with an inclined filter screen 410, a conical asphalt mixture discharge port 420 is provided on the housing below the filter screen 410, and a discharge port 430 is provided on the housing at the lower end of the filter screen 410, thereby filtering the asphalt mixture through the filter screen 410 to intercept unqualified large-sized aggregates and prevent the discharge port 420 from being blocked. The housing of the mixing equipment 400 is provided with a vibration device 440 for vibrating the filter screen 410, thereby facilitating the aggregates intercepted by the filter screen 410 to be discharged from the discharge port 430.

[0037] The asphalt storage tank 500 is connected to the asphalt inlets of the first wet grinding equipment 100, the second wet grinding equipment 200, the third wet grinding equipment 300 and the mixing equipment 400 through four branch pipelines, and valves are provided on each branch pipeline according to the required asphalt flow rate.

[0038] The tail gas treatment device is connected to the tail gas outlets of the first wet grinding device 100, the second wet grinding device 200, the third wet grinding device 300 and the mixing device 400 through a four-branch pipeline. The tail gas treatment device includes a condensing device 610 and an activated carbon adsorption device 620 connected in sequence. The condensing device 610 is used to condense the tail gas and output a solid-liquid mixture. The solid-liquid mixture flows back to the mixing device 400 through a reflux pipeline. The activated carbon adsorption device 620 is used to adsorb the non-condensable tail gas output by the condensing device 610.

[0039] The particle size of the coarse aggregate is preferably ≥10mm and ≤25mm, so as to provide a skeleton structure and increase the compressive strength and stability of the asphalt mixture. The particle size of the fine aggregate is preferably ≥2.36 and <10mm, so as to fill the gaps between the coarse aggregates and increase the density and overall strength of the asphalt mixture. The particle size of the fine filler is preferably <2.36mm, so as to fill the gaps between the fine aggregates and further increase the density and overall strength of the asphalt mixture.

[0040] The above-mentioned equipment using asphalt is equipped with a heating mechanism or a heat preservation mechanism to maintain the fluidity of the asphalt.

[0041] The above is an explanation of the relevant contents of the utility model. A person skilled in the art will be able to implement the utility model based on these explanations. Based on the above contents of the utility model, all other embodiments obtained by a person skilled in the art without creative work shall fall within the scope of protection of the utility model.

Claims

1. Asphalt mixture production system, characterized by: include: A first wet grinding device (100) is used to grind and mix mineral material and asphalt into a first mixture including coarse aggregate and asphalt; A second wet grinding device (200) is used to grind and mix the coarse aggregate and asphalt into a second mixture including fine aggregate and asphalt; A third wet grinding device (300) is used to grind and mix the fine aggregate and asphalt into a third mixture including fine filler and asphalt; The mixing device (400) is used to mix asphalt, additives, a first mixture output from the first wet grinding device (100), a second mixture output from the second wet grinding device (200), and a third mixture output from the third wet grinding device (300), so as to obtain an asphalt mixture.

2. The asphalt mixture production system according to claim 1, characterized in that: The first wet grinding device (100) is a rotor grinder; the second wet grinding device (200) and the third wet grinding device (300) are ball mills.

3. The asphalt mixture production system according to claim 1, characterized in that: The discharge port (420) of the first wet grinding device (100) is connected to the second wet grinding device (200) and the mixing device (400) via two branch pipelines.

4. The asphalt mixture production system according to claim 1, characterized in that: The discharge port (420) of the second wet grinding device (200) is connected to the third wet grinding device (300) and the mixing device (400) via two branch pipelines.

5. The asphalt mixture production system according to claim 1, characterized in that: A tilted filter screen (410) is provided at the lower part of the agitator inside the shell of the mixing device (400), a conical asphalt mixture discharge port (420) is provided on the shell below the filter screen (410), and a discharge port (430) is provided on the shell at the lower end of the filter screen (410).

6. The asphalt mixture production system according to claim 5, characterized in that: A vibrating device (440) for vibrating the filter screen (410) is provided on the housing of the mixing device (400).

7. The asphalt mixture production system according to claim 1, characterized in that: It also includes an asphalt storage tank (500), which is connected to the asphalt inlets of the first wet grinding device (100), the second wet grinding device (200), the third wet grinding device (300) and the mixing device (400) through four branch pipelines.

8. The asphalt mixture production system according to claim 1, characterized in that: It also includes an exhaust gas treatment device, which is connected to the exhaust gas outlets of the first wet grinding device (100), the second wet grinding device (200), the third wet grinding device (300) and the mixing device (400) through a four-branch pipeline.

9. The asphalt mixture production system according to claim 8, characterized in that: The tail gas treatment equipment comprises a condensing device (610), wherein the condensing device (610) is used to condense the tail gas and output a solid-liquid mixture, and the solid-liquid mixture flows back to the mixing equipment (400) through a reflux pipe.

10. The asphalt mixture production system according to claim 9, characterized in that: The tail gas treatment equipment further comprises an activated carbon adsorption device (620), wherein the activated carbon adsorption device (620) is used to adsorb the non-condensable tail gas output by the condensation device (610).

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