A sandwich type asphalt microwave heating device

Abstract

The present invention discloses a sandwich type asphalt microwave heating device, comprising: an outer cylinder, an openable outer cylinder top plate is arranged on the upper part of the outer cylinder, and a feed port is arranged on the outer cylinder top plate; an inner cylinder, the inner cylinder is arranged inside the outer cylinder and forms a sandwich structure with the outer cylinder; a bottom plate is arranged at the bottom of the sandwich structure, and a discharge port is arranged on the bottom plate; a microwave launcher, the microwave launcher is evenly arranged on the outer wall of the outer cylinder and the inner wall of the inner cylinder; a motor; the motor is arranged at the bottom of the outer cylinder; and a stirring device, the stirring device includes a stirring shaft and stirring blades, one end of the stirring shaft is connected to the motor, and the other end passes through the inner cylinder and is connected to the outer cylinder top plate, and the stirring blades are arranged on the stirring shaft in the sandwich structure. The device adopts a sandwich type, and the mixture heating rate is fast in the whole process, the heating is uniform, and the mixture is mixed uniformly, and it is suitable for large and medium-sized asphalt pavement maintenance projects.

Description

Technical Field

[0001] The invention belongs to the technical field of asphalt pavement engineering equipment, and in particular relates to a sandwich type asphalt microwave heating device. Background Art

[0002] Conventional asphalt microwave heating devices are limited by the penetration ability of microwaves. Small microwave ovens heat less asphalt mixture and cannot meet the needs of on-site construction. Large microwave ovens heat asphalt mixtures extremely unevenly, with the asphalt temperature on the outside often being higher and the asphalt temperature on the inside often failing to meet the design requirements, affecting the quality of major and medium-sized asphalt pavement repairs. Summary of the invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a sandwich asphalt microwave heating device with simple operation, fast heating speed, uniform heating and large volume. The device adopts a sandwich structure, and the asphalt mixture to be heated enters the microwave heating furnace through the feed port. The microwave emitters on the inner and outer cylinder walls heat the mixture at the same time, and the mixture is discharged through the feed port after heating. The whole process has a fast heating rate and uniform heating, which is suitable for large and medium-sized asphalt pavement maintenance projects.

[0004] To achieve the above purpose, the present invention adopts the following technical means:

[0005] A sandwich type asphalt microwave heating device, comprising:

[0006] An outer cylinder, wherein an openable outer cylinder top plate is arranged on the upper part of the outer cylinder, and a feed port is arranged on the outer cylinder top plate;

[0007] An inner cylinder, wherein the inner cylinder is arranged inside the outer cylinder and forms a sandwich structure with the outer cylinder; a bottom plate is arranged at the bottom of the sandwich structure, and a discharge port is arranged on the bottom plate;

[0008] Microwave emitters, the microwave emitters are evenly arranged on the outer wall of the outer tube and the inner wall of the inner tube;

[0009] Motor; the motor is arranged at the bottom of the outer cylinder;

[0010] A stirring device, comprising a stirring shaft, a connecting shaft and a stirring blade, wherein one end of the stirring shaft is connected to the motor, and the other end passes through the inner cylinder and is connected to the top plate of the outer cylinder, a plurality of connecting shafts are arranged on the stirring shaft in the sandwich structure, and one stirring blade is connected to one connecting shaft.

[0011] An openable inner cylinder top plate is arranged on the top of the inner cylinder.

[0012] The outer cylinder and the outer cylinder top plate, the inner cylinder and the inner cylinder top plate, and the outer cylinder and the bottom plate and the inner cylinder are all hinged and fixed, and the hinges of the outer cylinder top plate and the bottom plate are provided with hydraulic drive devices for opening and closing.

[0013] The outer cylinder and the inner cylinder are both made of stainless steel.

[0014] The stirring blade is arranged in parallel with the stirring shaft, and the connecting shaft is arranged perpendicular to the stirring shaft.

[0015] The lengths of the plurality of connecting shafts are different, and the stirring radii of the plurality of stirring blades around the stirring shafts are different.

[0016] Preferably, the lengths of the plurality of connecting shafts increase sequentially.

[0017] Preferably, the outer cylinder and the inner cylinder are both made of stainless steel.

[0018] Preferably, the outer cylinder and the inner cylinder are concentrically arranged, and the stirring shaft is arranged on the axis of the layered structure.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention utilizes microwave emitters evenly arranged around the outer cylinder and inside the inner cylinder to generate a strong magnetic field. The cold asphalt mixture inside the microwave heating furnace absorbs magnetic energy to generate heat, achieving the purpose of fast heating speed and uniform heating, thereby meeting the construction needs of major and medium repairs of asphalt concrete pavements. The asphalt mixture to be heated enters from the top of the microwave heating furnace, and the microwave emitters on the inner and outer cylinders heat the mixture at the same time. In addition, the stirring device stirs, and the material is discharged from the bottom of the microwave heating furnace after the heating is completed. Compared with the conventional large-volume microwave oven with microwave emitters arranged on the outside, the asphalt mixture is heated extremely unevenly, thereby affecting the quality of asphalt pavement repair. The device adopts a sandwich type, and the asphalt mixture to be heated enters the microwave heating furnace. The microwave emitters on the inner and outer cylinder walls heat the mixture at the same time, and the stirring blades of the stirring device fully stir the mixtures of different radii in the sandwich, thereby improving the heating efficiency of the asphalt, the uniformity of material heating, and the uniformity of mixing the old mixture, and finally meeting the needs of major and medium repairs of asphalt pavements.

[0021] Furthermore, since the interior is made of steel sections, the microwave transmitters evenly arranged on the inner side of the inner tube generate a strong magnetic field, which will be absorbed by the internal asphalt cold mixture in large quantities to generate heat, greatly improving the microwave heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the external structure of a sandwich type asphalt microwave heating device Figure 1 .

[0023] Figure 2 A schematic diagram of the external structure of a sandwich type asphalt microwave heating device Figure 2 .

[0024] Figure 3 Schematic diagram of the internal structure of a sandwich asphalt microwave heating device Figure 1 .

[0025] Figure 4 Schematic diagram of the internal structure of a sandwich asphalt microwave heating device Figure 2 . DETAILED DESCRIPTION

[0026] The structure and working principle of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a sandwich asphalt microwave heating device, the microwave heating furnace is a sandwich structure, the sandwich of the microwave heating furnace is in a space surrounded by an outer tube 1 and an inner tube 2; microwave launchers 3 are evenly arranged around the outer wall of the outer tube 1 and around the inner wall of the inner tube 2, an openable outer tube top plate 4 is arranged on the top of the outer tube 1, an openable inner tube top plate 5 is arranged on the top of the inner tube 2, an openable bottom plate 6 is arranged between the outer tube 1 and the inner tube 2, a feed port 7 is arranged on the outer tube top plate 4, and a discharge port 8 is arranged on the bottom plate 6; the stirring device comprises a stirring shaft 9, a connecting shaft 11 and a stirring blade 12, the lower part of the stirring shaft 9 is fixed on the motor 10, and the upper part passes through the inner tube top plate 5 to arrange the connecting shaft 11 and the stirring blade 12.

[0028] As a preferred embodiment, the microwave heating furnace is a space surrounded by an outer cylinder 1 and an inner cylinder 2. The outer cylinder 1 and the inner cylinder 2 can work simultaneously to heat the asphalt mixture in the interlayer. The radius of the outer cylinder 1 is about 200 cm, the radius of the inner cylinder is about 50 cm, the height of the outer cylinder 1 is about 150 cm, and the outer cylinder 1 and the inner cylinder 2 are both made of stainless steel.

[0029] The feed port 7 of the outer cylinder top plate 4 can be opened manually or automatically by a motor when asphalt mixture needs to be added to the space surrounded by the outer cylinder 1 and the inner cylinder 2. After the asphalt mixture is added, the discharge port 8 can be closed manually or automatically.

[0030] The stirring blades 12 of the stirring device are set to have stirring blades 12 of different radii. The specific structure is that a plurality of the connecting shafts 11 are set on the stirring shaft 9, and one stirring blade 12 is connected to one connecting shaft 11. The stirring blade 12 is set parallel to the stirring shaft 9, and the connecting shaft 11 is set perpendicular to the stirring shaft 9. The lengths of the plurality of connecting shafts 11 are different, and the radius of the plurality of stirring blades 12 around the stirring shaft 9 is different.

[0031] like Figure 3 and Figure 4 As shown, as a preferred embodiment, the lengths of the plurality of connecting shafts 11 increase sequentially.

[0032] The outer cylinder 1 and the inner cylinder 2 are both made of stainless steel.

[0033] The outer cylinder 1 and the inner cylinder 2 are arranged concentrically, and the stirring shaft 9 is arranged on the axis of the layered structure.

[0034] The present invention is characterized in that:

[0035] 1. Using microwaves to heat large volumes of asphalt mixtures (bulk materials) has achieved large and medium-sized road maintenance. Due to the limited penetration of microwaves, microwave emitters are installed in both the inner and outer cylinders, thereby improving the heating efficiency and uniformity of the asphalt mixture and meeting the needs of large and medium-sized road maintenance.

[0036] Second, heating various old asphalt mixtures, the mixing blades 12 of the mixing device have different radii, which ensures the uniformity of the mixing of the mixture between the inner and outer cylinders, thereby improving the quality of road repair.

[0037] 3. The heated asphalt recycled mixture enters from the top of the heating furnace and is discharged from the bottom of the heating furnace after heating is completed. The operation process is simple and clear, and the operation is convenient and reliable.

[0038] The functions and operation of the present invention are described below, specifically as follows:

[0039] 1. The device is mainly composed of the following parts:

[0040] (1) Microwave heating furnace components

[0041] As the core part of the equipment, its technology mainly includes the following three points:

[0042] 1) Inner and outer cylinders

[0043] Both the inner and outer tubes are made of steel sections, which have the characteristics of high bearing capacity, good toughness and strong impact resistance.

[0044] 2) Generation of high-power microwave magnetic field

[0045] High-power microwave transmitters are evenly arranged on the inner and outer cylinders, so that the mixed material in the large-volume microwave heating furnace is heated evenly and the mixed material in the furnace body is heated quickly.

[0046] 3) The magnetic field inside the furnace is evenly distributed

[0047] In order to meet the requirement of uniform heating of the mixture, the position of the microwave emitter is reasonably set according to the characteristics of the furnace body through precise calculation to generate a uniform microwave magnetic field and further generate a balanced heat source.

[0048] (2) Stirring device

[0049] 1) The stirring shaft 9 and the stirring blades 12 of the stirring device are made of stainless steel, and the connections between them are welded, which has the characteristics of high bearing capacity, good toughness and strong impact resistance.

[0050] 2) The stirring blades 12 of the stirring device are set to have blades of different radii so that the old mixed material is stirred evenly.

[0051] 2. Instructions for use:

[0052] The equipment has the advantages of simple structure, fast heating speed and convenient operation.

[0053] 1) Starting the microwave heating furnace: Before starting, check whether the microwave emitter, stirring device and circuit are normal.

[0054] 2) Before starting the equipment, check the connections between the outer cylinder, inner cylinder, top plate and bottom plate.

[0055] 3) According to the needs of asphalt pavement maintenance, select the asphalt recycled mixture to be added.

[0056] 4) Set the required heating temperature and start heating.

[0057] 5) When the heating is completed, open the discharge port, the asphalt mixture is automatically discharged from the bottom, and then close the discharge port and wait for the next heating.

[0058] 6) Key points to note during the control process:

[0059] 1. During the heating process, if you want to stop heating, just press the system stop button, the heating work will stop and the material will be unloaded automatically.

[0060] 2. In case of an unexpected emergency, press the emergency stop button and the equipment will stop running immediately and alarm. When the emergency is resolved, cut off the control system power supply, reconnect the control system power supply after 10 seconds and manually operate it to the original position.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art can still modify or make equivalent substitutions to the specific implementation schemes of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention.

Claims

1. A sandwich type asphalt microwave heating device, characterized in that: include: An outer cylinder (1), wherein an openable outer cylinder top plate (4) is provided on the upper portion of the outer cylinder (1), and a feed port (7) is provided on the outer cylinder top plate (4); An inner cylinder (2), wherein the inner cylinder (2) is arranged inside the outer cylinder (1) and forms a sandwich structure with the outer cylinder (1); a bottom plate (6) is arranged at the bottom of the sandwich structure, and a discharge port (8) is arranged on the bottom plate (6); Microwave emitters (3), the microwave emitters (3) being evenly arranged on the outer wall of the outer tube (1) and the inner wall of the inner tube (2); A motor (10); the motor (10) is arranged at the bottom of the outer cylinder (1); A stirring device, the stirring device comprising a stirring shaft (9), a connecting shaft (11) and a stirring blade (12), one end of the stirring shaft (9) being connected to a motor (10), and the other end passing through an inner cylinder (2) and connected to a top plate (4) of an outer cylinder, a plurality of connecting shafts (11) being arranged on the stirring shaft (9) in a sandwich structure, and one stirring blade (12) being connected to one connecting shaft (11); An openable inner cylinder top plate (5) is provided on the top of the inner cylinder (2); The stirring blade (12) is arranged parallel to the stirring shaft (9), and the connecting shaft (11) is arranged perpendicular to the stirring shaft (9).

2. The sandwich type asphalt microwave heating device according to claim 1, characterized in that: The outer cylinder (1) and the outer cylinder top plate (4) are hingedly fixed, the inner cylinder (2) and the inner cylinder top plate (5) and the outer cylinder (1) are hingedly fixed, the bottom plate (6) and the inner cylinder (2) are hingedly fixed, and a hydraulic drive device for opening and closing is provided at the hinge between the outer cylinder top plate (4) and the bottom plate (6).

3. The sandwich type asphalt microwave heating device according to claim 1, characterized in that: The outer cylinder (1) is made of stainless steel.

4. The sandwich type asphalt microwave heating device according to claim 1, characterized in that: The lengths of the plurality of connecting shafts (11) are different, and the stirring radii of the plurality of stirring blades (12) around the stirring shaft (9) are different.

5. The sandwich type asphalt microwave heating device according to claim 4, characterized in that: The lengths of the plurality of connecting shafts (11) increase sequentially.

6. The sandwich type asphalt microwave heating device according to claim 1, characterized in that: The inner cylinder (2) is made of stainless steel.

7. The sandwich type asphalt microwave heating device according to claim 1, characterized in that: The outer cylinder (1) and the inner cylinder (2) are arranged concentrically, and the stirring shaft (9) is arranged on the axis of the layered structure.

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