CN113194563A - Microwave heating device and heating method for asphalt concrete cold joint - Google Patents
Microwave heating device and heating method for asphalt concrete cold joint Download PDFInfo
- Publication number
- CN113194563A CN113194563A CN202110539497.4A CN202110539497A CN113194563A CN 113194563 A CN113194563 A CN 113194563A CN 202110539497 A CN202110539497 A CN 202110539497A CN 113194563 A CN113194563 A CN 113194563A
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- Prior art keywords
- asphalt concrete
- heating
- microwave
- transformer
- magnetron
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 51
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 14
- 230000005284 excitation Effects 0.000 claims abstract description 20
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/662—Aspects related to the boost transformer of the microwave heating apparatus
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Road Repair (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a microwave heating device for an asphalt concrete cold joint, which comprises a microwave excitation cavity and a heating radiation cavity, wherein the microwave excitation cavity is positioned at the top end of the heating radiation cavity, the microwave excitation cavity is communicated with the heating radiation cavity through a waveguide tube, a transformer and a magnetron are arranged in the microwave excitation cavity, a power supply end of the transformer is connected with an external power supply, and an output end of the transformer is electrically connected with two electrodes of the magnetron. The invention provides voltage through the transformer, so that the magnetron generates microwave to heat, thereby not only leading the heating speed of the cold joint to be fast, but also heating the asphalt concrete to be more than 100 ℃ from the normal temperature within 5 minutes; and the heating effect is more uniform, and the temperature difference between the inside and the outside of the asphalt concrete is not more than 10 ℃. The phenomena of easy scorching and aging of the surface of the asphalt concrete and insufficient internal temperature are avoided.
Description
Technical Field
The invention relates to water conservancy and hydropower engineering, in particular to a device and a method for heating an asphalt concrete cold joint by microwave, and particularly relates to a device and a method for heating a hydraulic engineering asphalt concrete cold joint by microwave.
Background
The asphalt concrete has excellent anti-seepage performance and foundation deformation adaptability, and is widely applied to various hydraulic and hydroelectric anti-seepage projects, wherein the asphalt concrete anti-seepage panel is one of application forms. When the asphalt concrete anti-seepage panel is constructed, the construction is carried out one by one according to the strips, and seams exist among different strips. Paving and rolling of asphalt concrete need to be carried out at high temperature. When the temperature of the first-laid strip is reduced to below 90 ℃ due to discontinuous construction, the joint position of the first-laid strip needs to be heated to 100-130 ℃ when the adjacent strips are constructed. The existing method adopts far infrared heating, but the method has the defect that the heating depth is limited and is only 1-2 cm. And the phenomena of scorching and aging of the surface of the asphalt concrete and insufficient internal temperature are easy to occur.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
In order to solve the technical problem, the invention provides a microwave heating device and a microwave heating method for an asphalt concrete cold joint.
The technical scheme of the invention is realized as follows:
according to one aspect of the invention, a microwave heating device for an asphalt concrete cold joint is provided.
The asphalt concrete cold joint microwave heating device comprises a microwave excitation cavity and a heating radiation cavity, wherein the microwave excitation cavity is positioned at the top end of the heating radiation cavity, the microwave excitation cavity is communicated with the heating radiation cavity through a waveguide tube, a transformer and a magnetron are arranged in the microwave excitation cavity, a power supply end of the transformer is connected with an external power supply, and an output end of the transformer is electrically connected with two electrodes of the magnetron.
According to another aspect of the invention, a method for microwave heating of an asphalt concrete cold joint is provided.
The microwave heating method for the asphalt concrete cold joint comprises the following steps:
the voltage is increased to more than 3000V by a transformer and is added to two poles of the magnetron;
the magnetron generates microwaves, and the microwaves are excited in the microwave excitation cavity and then are transmitted to the heating radiation cavity through the waveguide tube;
covering the heating radiation cavity on the surface of the asphalt concrete cold joint, wherein the temperature of the asphalt concrete at the joint is rapidly increased after the asphalt concrete absorbs the microwaves;
and (3) when the temperature of the asphalt concrete at the joint rises to 100-130 ℃, performing vibration rolling and joint riding rolling.
Has the advantages that: the invention provides voltage through the transformer, so that the magnetron generates microwave to heat, thereby not only leading the heating speed of the cold joint to be fast, but also heating the asphalt concrete to be more than 100 ℃ from the normal temperature within 5 minutes; and the heating effect is more uniform, and the temperature difference between the inside and the outside of the asphalt concrete is not more than 10 ℃. The phenomena of easy scorching and aging of the surface of the asphalt concrete and insufficient internal temperature are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an asphalt concrete cold joint microwave heating device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a microwave heating method for an asphalt concrete cold joint according to an embodiment of the invention.
In the figure:
1. a microwave excitation cavity; 2; a heating radiation cavity 3 and a transformer; 4. a magnetron; 5. a waveguide is provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
According to an embodiment of the invention, a microwave heating device for an asphalt concrete cold joint is provided.
As shown in fig. 1, the asphalt concrete cold joint microwave heating device according to the embodiment of the present invention includes a microwave excitation cavity 1 and a heating radiation cavity 2, wherein the microwave excitation cavity 1 is located at a top end of the heating radiation cavity 2, the microwave excitation cavity 1 is communicated with the heating radiation cavity 2 through a waveguide 5, a transformer 3 and a magnetron 4 are disposed in the microwave excitation cavity 1, a power supply end of the transformer 3 is connected to an external power supply, and an output end of the transformer 3 is electrically connected to two electrodes of the magnetron 4.
According to the embodiment of the invention, a microwave heating method for an asphalt concrete cold joint is provided.
As shown in fig. 2, a method for microwave heating of an asphalt concrete cold joint according to an embodiment of the present invention includes the following steps:
step S201, the voltage is increased to more than 3000V through a transformer 3 and is added to two poles of a magnetron 4;
step S202, a magnetron 4 generates microwaves, and the microwaves are excited in a microwave excitation cavity 1 and then are transmitted to a heating radiation cavity 2 through a waveguide tube 5;
step S203, covering the heating radiation cavity 2 on the surface of the asphalt concrete cold joint, and enabling the asphalt concrete at the joint to rapidly rise in temperature after absorbing the microwaves;
and S204, when the temperature of the asphalt concrete at the joint is increased to 100-130 ℃, performing vibration rolling and joint riding rolling.
In conclusion, by means of the technical scheme, the voltage is provided by the transformer, so that the magnetron generates microwaves to heat, the heating speed of the cold joint is high, and the asphalt concrete can be heated to more than 100 ℃ from the normal temperature within 5 minutes; and the heating effect is more uniform, and the temperature difference between the inside and the outside of the asphalt concrete is not more than 10 ℃. The phenomena of easy scorching and aging of the surface of the asphalt concrete and insufficient internal temperature are avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The utility model provides an asphalt concrete cold joint microwave heating device, its characterized in that, includes microwave excitation chamber (1) and heating radiation chamber (2), wherein, microwave excitation chamber (1) is located the top in heating radiation chamber (2), just microwave excitation chamber (1) with heating radiation chamber (2) communicate with each other through waveguide pipe (5), be provided with transformer (3) and magnetron (4) in microwave excitation chamber (1), the power end and the external power source of transformer (3) are connected, the output of transformer (3) is connected with the two poles of the earth electricity of magnetron (4).
2. A microwave heating method for an asphalt concrete cold joint is characterized in that the asphalt concrete cold joint is heated based on the asphalt concrete cold joint microwave heating device of claim 1, and the method comprises the following steps:
the voltage is increased to more than 3000V by a transformer (3) and is added to two poles of a magnetron (4);
the magnetron (4) generates microwaves, and the microwaves are excited in the microwave excitation cavity (1) and then are transmitted to the heating radiation cavity (2) through the waveguide tube (5);
covering the heating radiation cavity (2) on the surface of the asphalt concrete cold joint, wherein the temperature of the asphalt concrete at the joint is rapidly increased after the asphalt concrete absorbs the microwaves;
and (3) when the temperature of the asphalt concrete at the joint rises to 100-130 ℃, performing vibration rolling and joint riding rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539497.4A CN113194563A (en) | 2021-05-18 | 2021-05-18 | Microwave heating device and heating method for asphalt concrete cold joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539497.4A CN113194563A (en) | 2021-05-18 | 2021-05-18 | Microwave heating device and heating method for asphalt concrete cold joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113194563A true CN113194563A (en) | 2021-07-30 |
Family
ID=76982562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110539497.4A Pending CN113194563A (en) | 2021-05-18 | 2021-05-18 | Microwave heating device and heating method for asphalt concrete cold joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113194563A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060756A (en) * | 1990-09-11 | 1992-04-29 | 松下电器产业株式会社 | Use the thermatron of inverter power supply |
| CN2398318Y (en) * | 1999-11-05 | 2000-09-27 | 王霆 | Curing, maintaining and heating machine for asphalt pavement |
| CN2670427Y (en) * | 2002-11-12 | 2005-01-12 | 广东美的集团股份有限公司 | Microwave asphaltic road surface heater |
| CN2670426Y (en) * | 2002-11-12 | 2005-01-12 | 广东美的集团股份有限公司 | High-efficient microwave road surface heater |
| CN2719905Y (en) * | 2004-08-18 | 2005-08-24 | 杨林江 | Asphalt material microwave heating regenerating unit |
| CN2742714Y (en) * | 2004-10-09 | 2005-11-23 | 佛山市美的日用家电集团有限公司 | Power supply device for magnetic control tube |
| CN101232753A (en) * | 2008-01-18 | 2008-07-30 | 佛山市顺德区瑞德电子实业有限公司 | Electromagnetic stove quasi-resonance soft switch high-frequency converter |
| CN101487243A (en) * | 2009-02-12 | 2009-07-22 | 中国水电顾问集团华东勘测设计研究院 | Cold joint post-processing construction method for hydraulic asphalt concrete anti-seepage panel |
-
2021
- 2021-05-18 CN CN202110539497.4A patent/CN113194563A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060756A (en) * | 1990-09-11 | 1992-04-29 | 松下电器产业株式会社 | Use the thermatron of inverter power supply |
| CN2398318Y (en) * | 1999-11-05 | 2000-09-27 | 王霆 | Curing, maintaining and heating machine for asphalt pavement |
| CN2670427Y (en) * | 2002-11-12 | 2005-01-12 | 广东美的集团股份有限公司 | Microwave asphaltic road surface heater |
| CN2670426Y (en) * | 2002-11-12 | 2005-01-12 | 广东美的集团股份有限公司 | High-efficient microwave road surface heater |
| CN2719905Y (en) * | 2004-08-18 | 2005-08-24 | 杨林江 | Asphalt material microwave heating regenerating unit |
| CN2742714Y (en) * | 2004-10-09 | 2005-11-23 | 佛山市美的日用家电集团有限公司 | Power supply device for magnetic control tube |
| CN101232753A (en) * | 2008-01-18 | 2008-07-30 | 佛山市顺德区瑞德电子实业有限公司 | Electromagnetic stove quasi-resonance soft switch high-frequency converter |
| CN101487243A (en) * | 2009-02-12 | 2009-07-22 | 中国水电顾问集团华东勘测设计研究院 | Cold joint post-processing construction method for hydraulic asphalt concrete anti-seepage panel |
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Application publication date: 20210730 |