Small asphalt concrete on-site mixing equipment

Abstract

The utility model discloses a small asphalt concrete on-site mixing device which comprises a boxcar, an asphalt mixture stirrer is fixedly and obliquely arranged on the boxcar, a feeding port and a discharging port are formed in the upper portion and the lower portion of the stirrer respectively, an asphalt atomizer is further arranged on the upper portion of the stirrer, and a counter-force frame is arranged on the asphalt atomizer. A hydraulic press is arranged on the counter-force frame, the hydraulic press and a rigid sealing plate in the asphalt atomizer are fixed together, the rigid sealing plate moves up and down by starting the hydraulic press, the asphalt atomizer is connected with the small asphalt tank through a pipeline, a switch is arranged on the pipeline, and multiple sets of atomizing pipes are arranged on the lower portion of the asphalt atomizer. According to the utility model, on-site mixing is adopted, so that the problem of excessive aging of an asphalt film in an asphalt mixture is avoided; on-site mixing is adopted, so that the problem of insufficient temperature during paving of the asphalt mixture is solved; asphalt is sprayed in an atomization mode, and the mixing uniformity of the asphalt mixture is improved.

Description

Technical Field

[0001] The utility model relates to the field of engineering equipment, in particular to a small-sized asphalt concrete on-site mixing device. Background Art

[0002] Asphalt pavement has a high degree of mechanization in construction. Under the designed axle load traffic environment, the overall condition of the pavement is generally good, but local defects emerge one after another. For example, insufficient local compaction and segregation lead to excessive voids, which lead to looseness under the dual effects of rainfall and traffic loads. In addition, in the cold winter climate, local pavement suffers from frost heave and other defects. However, it is often found that after repairing local defects, the condition becomes worse. The reasons are as follows:

[0003] 1. Most local repairs are done by mixing in a centralized manner, using an insulation barrel to keep the mixture warm, and then paving after it arrives at the site. At this time, the temperature of the asphalt mixture has dropped. During paving, factors such as wind speed and low temperature of the underlying layer further aggravate the drop in the temperature of the asphalt mixture. Asphalt mixture is a typical temperature-sensitive material. Once the temperature drops, the viscosity increases, making it difficult to compact, forming a natural weak point.

[0004] 2. The asphalt in the asphalt mixture exists in the form of a thin film. In a high temperature environment, the longer the time, the more serious the aging of the asphalt, which reduces the durability of the asphalt mixture. Utility Model Content

[0005] The purpose of the utility model is to provide a small-sized asphalt concrete on-site mixing device.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] A small asphalt concrete on-site mixing equipment comprises a truck compartment, wherein an asphalt mixture agitator is fixedly and tiltedly placed in the truck compartment, a feed port and a discharge port are respectively arranged at the upper and lower parts of the agitator, an asphalt atomizer is also arranged at the upper part of the agitator, a reaction frame is arranged on the asphalt atomizer, a hydraulic press is placed on the reaction frame, the hydraulic press is fixed to a rigid sealing plate in the asphalt atomizer, and the rigid sealing plate can be moved up and down by starting the hydraulic press, the asphalt atomizer is connected to a small asphalt tank through a pipeline, a switch is arranged on the pipeline, and a plurality of atomization pipes are arranged at the lower part of the asphalt atomizer.

[0008] Further technology of the utility model:

[0009] Preferably, the stirring blades of the stirrer are in a spiral form, and the stirring blades and the spacing therebetween gradually decrease from bottom to top.

[0010] Preferably, the middle part of the atomizer tube is spherical, a ring is fixed in the spherical shape of the atomizer tube through supporting legs, and the upper part of the ring is a hollow small steel ball.

[0011] Preferably, the inner walls of the small asphalt tank, the atomizer and the stirrer are filled with heat transfer oil.

[0012] Preferably, a heater filled with heat transfer oil is provided on the truck compartment, and a heat transfer oil pipeline and a pipeline with a blower which are spirally wound around each other are provided inside the heater; the heat transfer oil pipeline is connected to a small asphalt tank, an asphalt atomizer and a stirrer.

[0013] The beneficial effects of the utility model are:

[0014] 1. On-site mixing is adopted to avoid the problem of excessive aging of asphalt film in asphalt mixture.

[0015] 2. Use on-site mixing to solve the problem of insufficient temperature when paving asphalt mixture.

[0016] 3. The asphalt is sprayed in an atomized manner to improve the uniformity of asphalt mixture mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments 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 creative work.

[0018] Figure 1 The overall diagram of the equipment of the utility model;

[0019] Figure 2 Schematic diagram of the atomizer in the utility model device;

[0020] Figure 3 Schematic diagram of the atomizing tube in the utility model device;

[0021] The symbols in the figure are: 1-agitator; 2-agitator blade; 3-discharge port; 4-feed port; 5-asphalt atomizer; 6-pipeline; 7-switch; 8-reaction frame; 9-hydraulic press; 10-rigid sealing plate; 12-hollow small steel ball; 13-ring; 14-support leg; 15-small asphalt tank; 16-heater; 17-air duct; 18-blower; 19-thermal oil pipeline; 20-truck compartment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be further described in detail below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model but not all. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] like Figure 1-3 The present embodiment provides a small-scale asphalt concrete on-site mixing equipment, including a truck compartment 20, wherein an asphalt mixture agitator 1 is fixedly and tiltedly placed in the truck compartment 20, and a feed port 4 and a discharge port 3 are respectively arranged at the upper and lower parts of the agitator 1, and an asphalt atomizer 5 is also arranged at the upper part of the agitator 1, and a reaction frame 8 is arranged on the asphalt atomizer 5, and a hydraulic press 9 is arranged on the reaction frame 8, and the hydraulic press 9 is fixed together with a rigid sealing plate 10 in the asphalt atomizer 5. By starting the hydraulic press 9, the rigid sealing plate 10 can be moved up and down, and the asphalt atomizer 5 is connected to a small asphalt tank 15 through a pipeline 6, and a switch 7 is arranged on the pipeline 6, and a plurality of atomization pipes 11 are arranged at the lower part of the asphalt atomizer 5.

[0024] The stirring blades 2 of the stirrer 1 are in a spiral form, and the stirring blades and the spacing between them gradually decrease from bottom to top.

[0025] The tilted placement of the stirrer 1 and the arrangement of the blades and the spacing of the spiral stirring blades are conducive to uniform mixing of the mixture. During the mixing process, the mixture in the stirrer 1 moves downward due to gravity, but the rotation of the stirring blades 2 makes the mixture move upward, thereby improving the mixing efficiency. At the same time, the tilted placement of the stirrer 1 is conducive to the smooth discharge of the mixture.

[0026] It should be noted that in this embodiment, the stirring blade drives the mixed material to move upward, which can be achieved by controlling the rotation direction of the spiral stirring blade by a motor.

[0027] The middle part of the atomizing tube 11 is spherical, a ring 13 is fixed in the spherical shape of the atomizing tube 11 through supporting legs 14, and a hollow small steel ball 12 is located on the upper part of the ring 13.

[0028] By starting the hydraulic press 9, the rigid sealing plate 10 can be moved up and down, and the switch 7 on the pipeline 6 is closed. When the rigid sealing plate 10 moves up, the hollow small steel ball 12 in the atomizing tube 11 moves upward, so that the atomizing tube 11 is in a sealed state, and the switch 7 is turned on. The asphalt in the small asphalt tank 15 flows to the asphalt atomizer 5 due to the negative pressure, and then the switch 7 is closed; when the rigid sealing plate 10 moves down, the hollow small steel ball 12 falls back into the ring 13, and the asphalt flows along the tiny atomizing tube 11 to achieve atomization.

[0029] The inner wall of the small asphalt tank 15, the atomizer 5 and the stirrer 1 is filled with heat transfer oil. The area around the atomizing pipe is also filled with high-temperature heat transfer oil.

[0030] The truck compartment 20 is provided with a heater 16 filled with heat transfer oil, and the interior of the heater is provided with a heat transfer oil pipeline 19 which is spirally wound with each other and a pipeline 17 with a blower 18; the heat transfer oil pipeline 19 is connected to a small asphalt tank 15, an asphalt atomizer 5, the atomizing pipe and the agitator 1 to achieve temperature control; the pipeline 17 with the blower 18 can heat the air in the pipeline 17.

[0031] Working principle and key issues:

[0032] 1. The switch on the pipeline, when the rigid sealing plate moves up, the small hollow steel ball in the atomization tube moves upward due to the influence of negative pressure, making the atomization tube in a sealed state, turn on the switch, and the asphalt in the small asphalt tank flows to the asphalt atomizer by negative pressure.

[0033] 2. When the rigid sealing plate moves down, the asphalt flows along the atomization tube. The diameter of the atomization tube is small, and a hollow small steel ball is arranged in the middle, which further compresses the pipe space and accelerates the flow speed of the asphalt, thereby achieving an asphalt effect similar to atomization.

[0034] 3. The area around the atomizing tube is filled with high-temperature heat-conducting oil, which makes the temperature inside the atomizing tube higher. The asphalt at high temperature will not adhere to the pipe and the hollow small steel ball.

[0035] 4. The tilted placement of the agitator allows the mixture to move downward due to gravity. At the same time, the upper spiral stirring blades are smaller in size, so the mixture has space to move downward. In addition, the lower spiral stirring blades are larger in size, and the rotation of the spiral stirring blades forces the mixture to move upward. The upward and downward movement of the mixture is conducive to uniform mixing. At the same time, the asphalt is atomized, which is more conducive to the uniform mixing of the asphalt mixture. It is worth further explaining that the spiral stirring blades can also rotate in the reverse direction, which is conducive to the discharge of the mixture.

[0036] 5. The spiral distribution of the heat transfer oil pipeline and the air pipeline in the heater extends the pipeline length, which is beneficial to the increase of the temperature of the heat transfer oil and air in the pipeline.

[0037] 6. Turn on the blower and use hot air treatment on the points to be paved. This is beneficial to increase the temperature of the underlying layer and improve the cleanliness, both of which are beneficial to the bonding effect of the new and old mixtures.

[0038] Specific implementation:

[0039] 1. Remove and clean the damaged parts of the local asphalt pavement, and preheat and deeply clean the points to be paved.

[0040] 2. Open the feed port, take out the coarse and fine aggregates with reasonable temperature from the oven, add them into the mixer, close the feed port and start the mixer.

[0041] 3. Turn off the asphalt pipeline switch, turn on the hydraulic press, lift the rigid sealing plate, then turn on the asphalt pipeline switch and add asphalt into the atomizer.

[0042] 4. The weight of the added asphalt is controlled by a small asphalt tank load-bearing device. When the designed value is reached, the asphalt pipeline switch is closed, and the rigid sealing plate is moved down at the same time, and the atomized asphalt is sprayed into the mixer.

[0043] 5. Check through the feeding port. After stirring evenly, open the discharging port and control the spiral stirring blades to rotate in the opposite direction. Place the mixture at the paving point and compact it.

[0044] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A small asphalt concrete on-site mixing equipment, characterized in that: It includes a truck compartment, in which an asphalt mixture mixer is fixedly and tiltedly placed, a feed port and a discharge port are respectively arranged at the top and bottom of the mixer, an asphalt atomizer is also arranged at the top of the mixer, a reaction frame is arranged on the asphalt atomizer, a hydraulic press is placed on the reaction frame, the hydraulic press is fixed to a rigid sealing plate in the asphalt atomizer, and the rigid sealing plate can be moved up and down by starting the hydraulic press, the asphalt atomizer is connected to a small asphalt tank through a pipeline, a switch is arranged on the pipeline, and a plurality of atomization pipes are arranged at the bottom of the asphalt atomizer.

2. A small asphalt concrete on-site mixing equipment according to claim 1, characterized in that: The stirring blades of the stirrer are in a spiral form, and the stirring blades and the spacing between them gradually decrease from bottom to top.

3. A small asphalt concrete on-site mixing equipment according to claim 1, characterized in that: The middle part of the atomizing tube is spherical, a circular ring is fixed in the spherical shape of the atomizing tube through supporting legs, and the upper part of the circular ring is a hollow small steel ball.

4. A small asphalt concrete on-site mixing equipment according to claim 1, characterized in that: The inner walls of the small asphalt tank, the atomizer and the stirrer are filled with heat transfer oil.

5. A small asphalt concrete on-site mixing equipment according to claim 4, characterized in that: A heater filled with heat transfer oil is arranged on the truck compartment, and a heat transfer oil pipeline and a pipeline with a blower which are spirally wound with each other are arranged inside the heater; the heat transfer oil pipeline is connected with a small asphalt tank, an asphalt atomizer and a stirrer.

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