CN107268402B - Microwave heating scarify machine and microwave heating wall thereof - Google Patents
Microwave heating scarify machine and microwave heating wall thereof Download PDFInfo
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- CN107268402B CN107268402B CN201710666390.XA CN201710666390A CN107268402B CN 107268402 B CN107268402 B CN 107268402B CN 201710666390 A CN201710666390 A CN 201710666390A CN 107268402 B CN107268402 B CN 107268402B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 227
- 238000001816 cooling Methods 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 45
- 239000012492 regenerant Substances 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 19
- 239000002826 coolant Substances 0.000 claims description 16
- 230000017525 heat dissipation Effects 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 abstract description 46
- 239000000463 material Substances 0.000 abstract description 22
- 238000005516 engineering process Methods 0.000 abstract description 5
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- 230000003321 amplification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000002283 diesel fuel Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
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- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
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- Architecture (AREA)
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- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention discloses a microwave heating wall for a microwave heating scarifier, which comprises a main microwave heating wall and auxiliary microwave heating walls hinged with two sides of the main microwave heating wall, wherein the two auxiliary microwave heating walls and the main microwave heating wall are same in structure; the microwave generating magnetron in the main microwave heating wall generates microwave energy with the frequency of 2.45GHz, and the microwave generating magnetron in the auxiliary microwave heating wall generates microwave energy with the frequency of 5.8 GHz. The invention adopts a microwave heating technology combining 2.45GHz and 5.8GHz frequencies, and realizes secondary heating and temperature raising of the asphalt material pile gathered after scarification and thermal bonding and heating of the asphalt pavement after scarification respectively, and the asphalt material is free from aging and coking, high-efficiency and environment-friendly.
Description
Technical Field
The invention relates to the technical field of road maintenance equipment, in particular to a microwave heating wall for a microwave heating scarifier and further relates to the microwave heating scarifier with the microwave heating wall.
Background
In the in-situ heat regeneration construction process, the heating scarification machine is usually arranged behind a plurality of asphalt pavement heating machines and is mainly used for scarifying the asphalt pavement after heating and softening to form a soft pile-shaped regenerated material.
The existing heating scarification machine can gather a 150-200 mm thick regenerated material pile in scarification operation of an asphalt pavement, the temperature of the regenerated material is generally 120-140 ℃, secondary heating and temperature raising are needed, the regenerated material pile is uniformly mixed with a new asphalt mixture and then paved and rolled, the secondary heating and temperature raising adopts fuel oil/gas open fire heating, fuel gas infrared heating or diesel oil hot air circulation heating modes, the heating temperature of the regenerated material is not easy to accurately control, the asphalt is easy to age and coke, and a large amount of toxic blue smoke is accompanied in the construction process, so that the serious problem of environmental pollution is caused; when the existing in-situ heat regeneration unit is constructed, the temperature of an asphalt material with the thickness of 10 mm-20 mm at the upper part of an asphalt pavement is too high (up to 200 ℃), but the temperature of the asphalt material at the position of 30 mm-60 mm at the lower part of the asphalt pavement is only 70-100 ℃, the temperature gradient between layers is large, the temperature of a bottom layer is low, the phenomenon of damage (the occurrence of a spent material) of aggregate gradation in the asphalt material in the milling process is easily caused, the temperature difference between new and old pavements is too large, the old pavements cannot be effectively bonded, and weak seams and weak interfaces are easily formed; the technology of milling and planing step by step in the market has the advantages of long unit battle line, complex equipment connection, large heat loss in the construction process, time and labor waste and money waste.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a microwave heating scarification machine and a microwave heating wall thereof, wherein a microwave heating technology combining 2.45GHz frequency and 5.8GHz frequency magnetrons is adopted, the 2.45GHz frequency microwave heating magnetrons are adopted to secondarily heat and raise the temperature of an asphalt material pile gathered after scarification, the heating depth is 150-200 mm, and the asphalt material is smokeless and flameless, has no aging and coking of the asphalt material, and is efficient and environment-friendly; the microwave heating magnetron with the frequency of 5.8GHz is adopted to heat and bond the scarified asphalt pavement, the heating depth is 75-80 mm, and the problems that the temperature difference between the new pavement and the old pavement is too large in the market, the old pavement and the new pavement cannot be bonded effectively, and weak joints and weak interfaces are easy to form are solved.
In order to solve the technical problem, the invention provides a microwave heating wall for a microwave heating scarifier, which is characterized by comprising a main microwave heating wall and two auxiliary microwave heating walls respectively positioned at the left side and the right side of the main microwave heating wall, wherein the two auxiliary microwave heating walls are hinged with the main microwave heating wall so as to ensure that the auxiliary microwave heating walls are turned over by 90 degrees relative to the main microwave heating wall;
the microwave heating structure comprises a main microwave heating wall, a plurality of rows of microwave heating assemblies, a plurality of auxiliary microwave heating walls and a plurality of microwave heating frames, wherein the main microwave heating wall and the auxiliary microwave heating walls on the two sides have the same structure and respectively comprise a microwave heating frame; the microwave generating magnetron installed in the main microwave heating wall is used for generating microwave energy with a frequency of 2.45GHz, and the microwave generating magnetron installed in the auxiliary microwave heating wall is used for generating microwave energy with a frequency of 5.8 GHz.
Furthermore, the microwave generation magnetron adopts a water-cooled microwave magnetron, and the cooling medium is water, heat conduction oil or cooling liquid.
Furthermore, in the main microwave heating wall and the auxiliary microwave heating walls on the two sides, the microwave generation magnetrons in adjacent rows are arranged in the same sequence, the liquid outlet pipe and the liquid inlet pipe of each adjacent microwave generation magnetron in each row are communicated, and a cooling medium flows through the liquid inlet pipe and the liquid outlet pipe to carry out liquid cooling on the microwave generation magnetrons.
Furthermore, cooling pipelines connected in series are adopted among the auxiliary microwave heating walls, the main microwave heating walls and the auxiliary microwave heating walls which are sequentially arranged for liquid cooling heat dissipation.
Furthermore, a microwave shielding device is arranged around the microwave heating wall and comprises a choke groove elastic sheet, a flexible shielding chain net I and a flexible shielding chain net II which are sequentially arranged from inside to outside.
Furthermore, the linear distance between the shrapnel of the choke groove and the waveguide antenna is 40 mm-50 mm, and the height of the suppression sheet of the shrapnel of the choke groove is the wavelength lambda of the waveguide antennagAnd 4, the linear distance from the flexible shielding chain network I to the waveguide antenna is 80-90 mm, the linear distance from the flexible shielding chain network II to the flexible shielding chain network I is 30mm, and the maximum mesh radius R of the flexible shielding chain network I and the flexible shielding chain network II is 6 mm.
Furthermore, microwave leakage detection devices are arranged around the microwave heating wall and comprise signal acquisition antennas, an impedance matching circuit, a detection circuit, an amplifying circuit and an alarm indicator lamp which are sequentially connected, the signal acquisition antennas couple leaked microwave signals and then input the microwave signals into the impedance matching circuit, the impedance matching circuit transmits the received signals to the detection circuit, the detection circuit filters out frequency band signals which are not emitted by microwaves and then transmits the frequency band signals to the amplifying circuit, the amplifying circuit amplifies and compares the processed signals with preset values and judges the signals and inputs judgment result signals into the alarm circuit, and the alarm circuit determines whether to give an alarm according to the result.
Correspondingly, the invention also provides a microwave heating scarification machine which comprises a chassis walking system, wherein a rack is carried on the chassis walking system, a cab, an auxiliary engine, a regenerant box, a cooling system, a generator set and a transformer box are sequentially arranged on the rack from front to back, a scarification device is arranged below the rack, and a regenerant spraying device is arranged in front of the scarification device.
Furthermore, the top end face of the main microwave heating wall is connected with the bottom of the rack through a telescopic sleeve, the bottom end of the auxiliary microwave heating wall is connected with the bottom of the rack through a telescopic hydraulic rod, and the auxiliary microwave heating wall can overturn for 90 degrees relative to the main microwave heating wall when the hydraulic rod moves telescopically.
Further, the cooling system provides a cooling cycle for the microwave heating wall and circulates back to the cooling system through the regenerant tank.
Compared with the prior art, the invention has the following beneficial effects:
1) the microwave heating technology combining 2.45GHz frequency and 5.8GHz frequency magnetrons is adopted, the 2.45GHz frequency microwave heating magnetrons are adopted to secondarily heat the asphalt material pile gathered after scarification to raise the temperature, the heating depth is 150-200 mm, no smoke or flame exists, the asphalt material is not aged or coked, and the method is efficient and environment-friendly; the microwave heating magnetron with the frequency of 5.8GHz is adopted to heat and bond the scarified asphalt pavement, the heating depth is 75-80 mm, and the problems that the temperature difference between the new pavement and the old pavement is too large in the market, the asphalt pavement cannot be bonded effectively, and weak joints and weak interfaces are easy to form are solved;
2) by adopting a unique serial liquid cooling heat dissipation technology, the cooling medium is water, heat conduction oil or cooling liquid, so that the heat dissipation is uniform and no dead angle exists, the liquid temperature can be effectively controlled, and the working stability of key components such as a magnetron and the like is improved; and the cooling liquid flows through the regenerant box, and the heat released by the operation of the microwave generation magnetron is used as a heat source of the regenerant box, so that the heating of the regenerant or hot asphalt is realized, and the cooling of the microwave generation magnetron is also realized.
3) By adopting the multilayer shielding combination of the choke groove elastic sheet and the flexible shielding chain net, the electromagnetic shielding device has good shielding effect on high-frequency and low-frequency electromagnetic fields;
4) the microwave heating wall is provided with microwave leakage detection devices around, and when microwave leakage is detected, an alarm can be given, so that the safety of equipment is improved.
Drawings
FIG. 1 is a front view of a microwave heated scarifier in accordance with the present invention;
FIG. 2 is a top view of the microwave heated scarifier of the present invention;
FIG. 3 is a perspective view (front left 45) of the microwave heated scarifier of the present invention;
FIG. 4 is a perspective view (45 ° to the right and back) of the microwave heated scarifier of the present invention;
FIG. 5 is a driving state diagram of the microwave heating scarifier of the present invention;
FIG. 6 is a schematic view of a heating net surface structure of the microwave heating wall;
FIG. 7 is a sectional view A-A of FIG. 6;
FIG. 8 is a cross-sectional view B-B of FIG. 6;
FIG. 9 is a cross-sectional view C-C of FIG. 6;
FIG. 10 is a schematic view of a water-cooled microwave magnetron configuration;
FIG. 11 is a schematic view of a cooling duct structure of a microwave magnetron according to the present invention;
FIG. 12 is a schematic view of the microwave shielding arrangement of the present invention;
FIG. 13 is a schematic view of the installation of the microwave flexible shielding chain mesh structure of the present invention;
FIG. 14 is a schematic diagram of the operation of the microwave leak detection apparatus of the present invention;
FIG. 15 is a graph of the temperature rise over time for a 2.45GHz magnetron heated asphalt pavement of the present invention;
FIG. 16 is a graph of the temperature rise over time for a 5.8GHz magnetron heated asphalt pavement of the invention.
Reference numerals are as follows: 1. a chassis traveling system, 2 parts of a rack, 3 parts of a generator set, 4 parts of a transformer box, 5 parts of a microwave heating wall, 5 parts of 1 part of a microwave heating frame, 5 parts of 2 parts of a telescopic sleeve, 5 parts of 3 parts of a microwave generation magnetron, 5 parts of 3 parts of 1 part of a power supply interface, 5 parts of 3 parts of 2 parts of a heat dissipation sleeve, 5 parts of 3 parts of a liquid inlet pipe, 5 parts of 3 parts of 4 parts of a liquid outlet pipe, 5 parts of 3 parts of 5 parts of 3 parts of a microwave radiation port, 5 parts of 4 parts of a cooling pipeline, 5 parts of 4 parts of 1 part of a cooling pipe I, 5 parts of 4 parts of 2 parts of a cooling pipe II, 5 parts of 4 parts of 3 parts of 5 parts of 4 parts of 5 parts of 4 parts of a cooling pipe IV, 5 parts of a waveguide antenna, 5 parts of 6 parts of a wave transmission device, 5 parts of 7 parts of a microwave shielding device, 5 parts of 7 parts of a protective board, 5 parts of 1 protective board, The device comprises choke groove elastic sheets, 5-7-2 parts, flexible shielding chain nets I, 5-7-3 parts, flexible shielding chain nets II, 5-8 parts, a microwave leakage detection device, 5-8-1 parts, a signal acquisition antenna, 5-8-2 parts, an impedance matching circuit, 5-8-3 parts, a detection circuit, 5-8-4 parts, an amplifying circuit, 5-8-5 parts, an alarm indicator light, 5-9 parts, a main microwave heating wall, 5-10 parts, an auxiliary microwave heating wall, 6 parts, a cooling system, 7 parts, an auxiliary engine, 8 parts, a hydraulic system, 9 parts, an electrical system, 10 parts, a fuel tank, 11 parts, a water tank, 12 parts, a cab, 13 parts, a regenerant tank, 14 parts, a regenerant spraying device, 15 parts, a raking device, 15-1 parts, a side raking device, 15-2 parts and a main raking device;
L1, the distance from the left to the right and the front to the back of adjacent waveguide antennas, L2, the distance from a wave-transparent protection plate to an asphalt pavement, L3, the linear distance from a choke groove elastic sheet to a waveguide antenna, L4, the linear distance from a flexible shielding chain net I to a waveguide antenna, L5, the linear distance from the flexible shielding chain net I to a flexible shielding chain net II, H, the height of a suppression sheet of the choke groove elastic sheet, and R, the maximum mesh radius of the flexible shielding chain net.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 5, the microwave heating scarifier of the present invention comprises a chassis traveling system 1, a frame 2, a generator set 3, a transformer tank 4, a microwave heating wall 5, a cooling system 6, a secondary engine 7, a hydraulic system 8, an electrical system 9, a fuel tank 10, a water tank 11, a cab 12, a regenerant tank 13, a regenerant spraying device 14 and a scarifier 15; the chassis walking system 1 is characterized in that a front axle and a rear axle of the chassis walking system 1 are respectively provided with a drive axle, the upper part of the front axle and the rear axle is used for bearing the rack 2, the front axle and the rear axle have stepless speed change and all-wheel steering functions, the generator set 3 is positioned at the rear part of the rack 2, the transformer boxes 4 are provided with a plurality of groups and positioned at the left side and the right side of the rack 2, a maintenance channel is arranged between the adjacent transformer boxes 4, the microwave heating wall 5 is provided with three groups which are positioned below the rack 2 and can lift along the vertical direction, two groups are arranged between the front wheel and the rear wheel, one group is arranged behind the rear wheel, the cooling system 6 is provided with a plurality of groups and positioned at the left side and the right side of the generator set 3, the auxiliary engine 7 is positioned at the front part of the rack 2, the left side of the auxiliary engine 7 is provided with a cab 12, the right side is provided with a water tank 11 and a hydraulic oil tank of a hydraulic system 8, the electrical system 9 and a fuel tank 10 are respectively positioned at the right rear side and the left rear side of the rack 2, and a regenerant tank 13 is positioned on the upper plane of the right front part of the rack 2, the raking device 15 is in a shape of Chinese character 'pin', is located at the foremost part of the lower portion of the rack 2 and consists of two groups of side raking devices 15-1 and a group of main raking devices 15-2, wherein the side raking devices 15-1 are arranged in front of the main raking devices 15-2, and the regeneration agent spraying devices 14 are arranged at the front parts of the side raking devices 15-1 and the main raking devices 15-2.
Each group of microwave heating walls 5 comprises a main microwave heating wall 5-9 and two auxiliary microwave heating walls 5-10 which are respectively positioned at the left side and the right side of the main microwave heating wall, the two auxiliary microwave heating walls 5-10 are hinged with the main microwave heating wall 5-9, as shown in figures 3 and 4, the top end of the main microwave heating wall 5-9 is connected with the bottom of the rack 2 through an expansion sleeve 5-2, and the expansion sleeve 5-2 can realize the adjustment of the height of the microwave heating wall 5 from the ground of 50 mm-350 mm during the expansion and contraction movement. The bottom ends of the auxiliary microwave heating walls 5-10 are connected with the bottom of the rack through telescopic hydraulic rods, and as the auxiliary microwave heating walls 5-10 are hinged with the main microwave heating walls 5-9, the auxiliary microwave heating walls 5-10 can be turned over by 90 degrees relative to the main microwave heating walls 5-9 when the hydraulic rods move in a telescopic mode. The width of the heating ground can be adjusted according to actual needs by combining a plurality of microwave heating wall components.
The structure of the main microwave heating wall 5-9 is the same as that of the two side auxiliary microwave heating walls 5-10, as shown in fig. 6 to 9, the microwave heating wall comprises a microwave heating frame 5-1, the top of the microwave heating frame 5-1 is connected with a telescopic sleeve 5-2, the other end of the telescopic sleeve 5-2 is connected with the bottom of the rack 2, as shown in fig. 6, a plurality of groups of microwave heating components are uniformly arranged in the microwave heating frame 5-1, the length and the width of the main microwave heating wall 5-9 and the two side auxiliary microwave heating walls 5-10 are the same, three rows of microwave heating components are uniformly arranged in the microwave heating frame 5-1 along the front-back direction (length direction), each microwave heating component comprises a microwave generation magnetron 5-3, a waveguide antenna 5-5 and a wave-transmitting protection plate 5-6, a waveguide antenna 5-5 is connected below a microwave radiation port 5-3-5 of the microwave generation magnetron 5-3, and a wave-transparent protective plate 5-6 is horizontally arranged below the waveguide antenna 5-5 (see fig. 7-9 in particular). The microwave generation magnetron 5-3 assembled in the main microwave heating wall is used for generating microwave energy with the frequency of 2.45GHz, so that the secondary heating temperature raising of the asphalt material pile gathered after the raking is loosened is realized, and the heating depth is 150 mm-200 mm; the microwave generation magnetrons 5-3 assembled in the auxiliary microwave heating walls on the two sides are used for generating microwave energy with the frequency of 5.8GHz to realize thermal bonding heating of the scarified asphalt pavement, and the heating depth is 75-80 mm.
In order to compare the heating effect of 2.45GHz frequency microwaves and 5.8GHz frequency microwaves on the asphalt pavement, the two microwaves are respectively adopted to heat the asphalt pavement for 1-6 minutes, and then the heating is stopped for 1 minute. The effect can be seen in fig. 15 and 16, wherein fig. 15 is a graph of the temperature rise of the microwave with the frequency of 2.45GHz along with the time, and fig. 16 is a graph of the temperature rise of the microwave with the frequency of 5.8GHz along with the time. As can be seen from the figure, 2.45GHz microwave is beneficial to deeply heating the road surface; the temperature of the pavement can be quickly raised by the 5.8GHz microwave in a shorter time, the temperature gradient between layers is small, and the heating is uniform.
In the embodiment of the invention, the waveguide antenna 5-5 and the wave-transparent protection plate 5-6 are used for transmitting microwave energy of two frequencies, the waveguide antenna 5-5 adopts 90-degree bent waveguide, and the wave-transparent protection plate 5-6 is made of polytetrafluoroethylene. The waveguide antenna 5-5 and the wave-transparent protective plate 5-6 are used for transmitting microwave energy with a frequency of 5.8 GHz. The distances L1 between the adjacent left and right wave guide antennas 5-5 in the adjacent microwave heating components are 30-50 mm, and the distance L2 between the wave-transparent protective plate 5-6 and the asphalt pavement is 60-80 mm.
When the microwave heating scarification machine works, a generator set 3 converts chemical energy of diesel oil into 220V/380V electric energy, a low-voltage transformer, a high-voltage transformer, a rectifier diode and the like are arranged in a transformer box 4, the low-voltage transformer is used for providing 3.0V filament voltage for a microwave generation magnetron 5-3 in a microwave heating wall, a half-wave voltage doubling rectifying circuit formed by the high-voltage transformer and the rectifier diode provides 4.65kV anode voltage for the microwave transmission magnetron 5-3, the electric energy is converted into continuous electromagnetic energy, the electromagnetic energy is transmitted and permeated into an asphalt pavement medium in a wave mode through a waveguide antenna 5-5 and a wave transmission protection plate 5-6 medium, the medium is lost to generate heat, and the temperature of the asphalt pavement is increased. The microwave heating process is smokeless and flameless, the asphalt is not aged or coked, and the problems of environmental pollution and road performance reduction caused by the fact that the asphalt pavement is easily scorched by the traditional infrared and hot air heating mode are solved.
The microwave generation magnetron is easy to generate heat and damage during working and needs to be cooled, so the microwave generation magnetron 5-3 adopts a water-cooled microwave magnetron in the prior art, the structure of the microwave generation magnetron is shown in detail in figure 10, the upper part is provided with a power supply interface 5-3-1, the lower part is provided with a microwave emission port 5-3-5, the middle cylindrical part of the magnetron is provided with a heat dissipation sleeve 5-3-2, the side wall of the heat dissipation sleeve 5-3-2 is communicated with a liquid inlet pipe 5-3-3 and a liquid outlet pipe 5-3-4, the heat dissipation sleeve 5-3-2 is in interference fit with a vacuum pipe arranged in the microwave generation magnetron 5-3, the liquid inlet pipe 5-3-3 and the liquid outlet pipe 5-3-4 are staggered up and down and left and right, a low-temperature cooling medium enters through the liquid inlet pipe 5-3-3 with low liquid level, the high-temperature cooling medium flows out through the liquid outlet pipe 5-3-4 with high liquid level.
As shown in FIG. 11, for the cooling channels of the entire microwave heating wall, as for the single main microwave heating wall 5-9 or the sub microwave heating wall 5-10, the liquid outlet pipes 5-3-4 of the adjacent microwave generating magnetrons 5-3 in each row are communicated with the liquid inlet pipes 5-3-3, and the microwave generating magnetrons 5-3 in the adjacent row are arranged in the same sequence, that is, the liquid outlet pipes 5-3-4 of all the microwave generating magnetrons on one side of the adjacent row are communicated with each other, and the corresponding liquid inlet pipes 5-3-3 on the other side are communicated with each other. As can be seen from fig. 11, in the sub-microwave heating wall 5-10, the liquid inlet pipes 5-3-3 of the three rows of microwave generating magnetrons 5-3 located behind the microwave heating frame 5-1 are communicated with each other, the liquid outlet pipes 5-3-4 of the three rows of microwave generating magnetrons located in front are correspondingly communicated with each other, and in the case of the main microwave heating wall 5-9, the liquid inlet pipes of the three rows of microwave generating magnetrons located in front of the microwave heating frame are communicated with each other, and the liquid outlet pipes of the three rows of microwave generating magnetrons located in rear are correspondingly communicated with each other.
In order to communicate the cooling effect of the entire microwave heating wall, cooling ducts 5-4 are introduced at the edges of the microwave heating frame. For convenience of description, the auxiliary microwave heating wall 5-10 located at the left side of the main microwave heating wall 5-9 will be referred to as the left side auxiliary microwave heating wall, and correspondingly, the auxiliary microwave heating wall 5-10 located at the right side of the main microwave heating wall 5-9 will be referred to as the right side auxiliary microwave heating wall, when viewed in the forward direction of the microwave heating harrowing machine. The cooling pipeline 5-4 comprises a cooling pipeline I5-4-1 communicated with liquid inlet pipes of three rows of microwave generating magnetrons behind the left auxiliary microwave heating wall, a cooling pipeline II5-4-2 connected with liquid outlet pipes of three rows of microwave generating magnetrons in front of the left auxiliary microwave heating wall and liquid inlet pipes of three rows of microwave generating magnetrons in front of the main microwave heating wall, a cooling pipeline III5-4-3 communicated with liquid outlet pipes of three rows of microwave generating magnetrons behind the main microwave heating wall and liquid inlet pipes of three rows of microwave generating magnetrons behind the right auxiliary microwave heating wall, and a cooling pipeline IV5-4-4 communicated with liquid outlet pipes of three rows of microwave generating magnetrons in front of the right auxiliary microwave heating wall. The cooling liquid is provided by the cooling system 6, the cooling medium can be water, heat conducting oil or cooling liquid for an automobile engine, and a user can select a proper cooling medium according to specific conditions. The water is suitable for the occasions with the environment temperature of more than 10 ℃. The heat conducting oil is suitable for auxiliary heating occasions of the vehicle-mounted regenerant. The cooling liquid for the automobile engine is mainly suitable for northern cold areas, and aims to prevent components from being damaged and incapable of working normally due to the fact that cooling media are frozen due to low ambient temperature and cause cooling failure. The cooling medium flows in the direction indicated by the arrow in fig. 11, i.e. the cooling medium enters the liquid inlet pipes of the three rows of microwave generation magnetrons in the left side auxiliary microwave heating wall from the cooling pipe I5-4-4, the cooling medium is communicated with the flow channel from the back of the left side auxiliary microwave heating wall to the front of the left side auxiliary microwave heating wall, flows out of the liquid outlet pipes, enters the liquid inlet pipes of the three rows of microwave generation magnetrons in the main microwave heating wall through the cooling pipe II5-4-2, flows out of the liquid outlet pipes from the back of the main microwave heating wall, enters the liquid inlet pipes from the back of the right side auxiliary microwave heating wall through the cooling pipe III5-4-3, and finally flows out of the liquid outlet pipes from the front of the right side auxiliary microwave heating wall, and flows back to the cooling system 6 through the cooling pipe IV 5-4-4. That is to say, the cooling pipelines connected in series are adopted among the sequentially arranged auxiliary microwave heating walls, the main microwave heating walls and the auxiliary microwave heating walls for liquid cooling heat dissipation.
The water-cooling heat dissipation mode system is simple and compact in structure, convenient to install, maintain and repair, capable of effectively solving the problems that an air-cooling heat dissipation mode is poor in cooling performance, difficult in air duct design and processing and the like, uniform in heat dissipation and free of dead angles, capable of effectively controlling the temperature of a cooling medium and capable of improving the working stability of key components such as a magnetron and the like.
In order to obtain a good microwave shielding effect, a multi-layer shielding body protection design of a flexible shielding chain net and a choke groove elastic sheet is adopted. Arranging microwave shielding devices 5-7 around the microwave heating wall 5, as shown in fig. 7-9 and 12, wherein the microwave shielding devices 5-7 are composed of four groups of choke groove elastic sheets 5-7-1, flexible shielding chain nets I5-7-2 and flexible shielding chain nets II 5-7-3, the choke groove elastic sheets 5-7-1 are respectively positioned at the inner sides of the flexible shielding chain nets I5-7-2 and used as a first layer of protection for microwave leakage, the linear distance L3 between the choke groove elastic sheets 5-7-1 and the waveguide antenna 5-5 is 40-50 mm, and the height H of the choke groove elastic sheets 5-7-1 is the wavelength lambda of the waveguide antenna 5-5g4, the flexible shielding chain net I5-7-2 is fixed around the microwave heating wall 5 in an annular manner through a plurality of bolts, the linear distance L4 from the waveguide antenna 5-5 is 80 mm-90 mm, the flexible shielding chain net II 5-7-3 is positioned at the outer side of the flexible shielding chain net I5-7-2 and is annularly fixed around the microwave heating wall 5 through a plurality of bolts, the linear distance L5 from the flexible shielding chain net I5-7-2 is 30mm, the maximum mesh radius R of the flexible shielding chain net I5-7-2 and the flexible shielding chain net II 5-7-3 is 6mm (shown in figure 13), after the flexible shielding chain net and the choke groove spring sheet are combined in a multi-layer shielding mode, the microwave leakage quantity at the position 5cm outside the microwave heating wall can be controlled at 2 mW/cm. 2Within, obtain good microwave shielding effect.
In addition, in order to improve the safety of each element in the microwave heating wall, a microwave leakage detection device 5-8 is arranged on the periphery of the microwave heating wall 5, the microwave leakage detection device 5-8 consists of a signal acquisition antenna 5-8-1, an impedance matching circuit 5-8-2, a detection circuit 5-8-3, an amplification circuit 5-8-4 and an alarm indicator lamp 5-8-5 which are sequentially connected, and the specific circuit is shown in figure 14. The impedance matching circuit comprises a capacitor C1 and an inductor L1 which are connected in series, and an inductor L2 is connected in series with the node of the capacitor C1 and the inductor L1 and grounded. The detection circuit comprises a filter formed by a comparator U1, and the amplification circuit comprises a comparator formed by a comparator U2, which belongs to the prior art, and a specific circuit schematic diagram can be seen in fig. 14. When the microwave leakage detection device works, a signal acquisition antenna 5-8-1 couples a leaked microwave signal and inputs the microwave signal into an impedance matching circuit 5-8-2, the impedance matching circuit 5-8-2 transmits the received signal to a detection circuit 5-8-3, the detection circuit 5-8-3 filters a frequency band signal which is not emitted by microwaves and then transmits the frequency band signal to an amplifying circuit 5-8-4, the amplifying circuit 5-8-4 processes the received signal and then amplifies, compares and judges the signal with a preset value (the output value of the detection circuit 5-8-3) and inputs a judgment result signal into an alarm circuit 5-8-5, the alarm circuit 5-8-5 determines whether to give an alarm or not according to the result, if the monitoring result of the amplifying circuit 5-8-4 reaches a preset threshold, the alarm circuit 5-8-5 gives an alarm indication, otherwise, the alarm is not given.
Furthermore, the regenerant or hot asphalt in the regenerant tank 13 of the microwave-heated scarifier adopts a heat-conducting oil circulation heating mode, namely, the cooling system 6 provides a cooling circulation for the microwave heating wall 5, and the cooling medium flows through the regenerant tank and circulates back to the cooling system. The heat released by the operation of the microwave generation magnetron 5-3 can be introduced into the regenerant box 13 through a heat conducting oil circulating pipeline to be used as a heat source, so that the heating of the regenerant or hot asphalt is realized, and the cooling of the microwave generation magnetron 5-3 is realized.
The regenerant spraying device 14 of the microwave heating scarification machine is responsible for spraying a proper amount of regenerant or hot asphalt on the asphalt pavement after heating and softening, the spraying amount is 1-2% of the total amount of the regenerant, the scarification device 15 is responsible for scarifying the old asphalt pavement after heating and softening, the one-time scarification depth is 75-80 mm, a trapezoidal ridge-shaped regenerated material pile is formed, the height of the material pile is 150-200 mm, the width of the bottom is 1000-1300 mm, and the temperature of the pavement after scarification is not lower than 120 ℃.
The microwave heating scarification machine is matched with a plurality of asphalt pavement microwave heating machines for use, and performs one-time scarification on the heated and softened old asphalt pavement, and the working principle is as follows: a driver enters a cab 12, a generator set 3 and an auxiliary engine 7 of the microwave heating scarification machine are started, the operation speed is about 3m/min generally under the driving of a chassis walking system 1, the old asphalt pavement after heating and softening is subjected to one-time scarification, the scarification depth is 75-80 mm, a trapezoid ridge-shaped regeneration material pile is formed, the height of the material pile is 150-200 mm, the bottom width is 1000-1300 mm, and the temperature of the road surface after scarification is not lower than 120 ℃. The height of the microwave heating wall 5 from the ground is adjusted to be 50 mm-70 mm, a generator set 3 and a transformer box 4 provide a working power supply for the microwave heating wall 5, a microwave heating magnetron with the frequency of 2.45GHz is adopted to secondarily heat the collected asphalt pile after scarification, the heating depth is 150 mm-200 mm, no smoke or flame exists, the asphalt material is not aged or coked, and the method is efficient and environment-friendly; the microwave heating magnetron with the frequency of 5.8GHz is adopted to heat and bond the scarified asphalt pavement, the heating depth is 75-80 mm, and the problems that the temperature difference between the new pavement and the old pavement is too large in the market, the old pavement and the new pavement cannot be bonded effectively, and weak joints and weak interfaces are easy to form are solved. The microwave heating wall 5 is easy to generate heat and damage during working, the cooling system 6 is started to provide cooling medium for circulation, the magnetron in the microwave heating wall is cooled and cooled, and a heat conduction oil circulation pipeline is introduced into the regenerant box 13, so that heating of the regenerant or hot asphalt is realized, and cooling of the microwave generation magnetron 5-3 is also realized. The problems of poor cooling performance, difficult design and processing of an air duct and the like of an air cooling heat dissipation mode are effectively solved, the heat dissipation is uniform, no dead angle exists, the temperature of a cooling medium can be effectively controlled, and the working stability of key components such as a magnetron and the like is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be also considered as the protection scope of the present invention.
Claims (10)
1. A microwave heating wall for a microwave heating scarifier is characterized by comprising a main microwave heating wall and two auxiliary microwave heating walls which are respectively positioned at the left side and the right side of the main microwave heating wall, wherein the two auxiliary microwave heating walls are hinged with the main microwave heating wall so as to ensure that the auxiliary microwave heating walls can be turned over by 90 degrees relative to the main microwave heating wall;
the main microwave heating wall and the auxiliary microwave heating walls on the two sides have the same structure and respectively comprise a microwave heating frame, a plurality of rows of microwave heating assemblies are uniformly arranged in the microwave heating frame, each microwave heating assembly comprises a microwave generation magnetron, a waveguide antenna and a wave-transparent protection plate, the waveguide antenna is connected below a microwave radiation opening of the microwave generation magnetron, and the wave-transparent protection plate is horizontally arranged below the waveguide antenna; the microwave generating magnetron installed in the main microwave heating wall is used for generating microwave energy of 2.45GHz frequency, and the microwave generating magnetron installed in the auxiliary microwave heating wall is used for generating microwave energy of 5.8GHz frequency.
2. The microwave heating wall for the microwave heating scarifier according to claim 1, wherein the microwave generating magnetron is a water-cooled microwave magnetron, and the cooling medium is water, heat conducting oil or cooling liquid.
3. The microwave heating wall for the microwave scarifier as claimed in claim 2, wherein the microwave generating magnetrons in adjacent rows are arranged in the same order in the main microwave heating wall and the two side sub-microwave heating walls, the liquid outlet pipe and the liquid inlet pipe of the adjacent microwave generating magnetrons in each row are connected, and a cooling medium flows through the liquid inlet pipe and the liquid outlet pipe to cool the microwave generating magnetrons in a liquid cooling manner.
4. The microwave heating wall for the microwave heating scarifier as claimed in claim 3, wherein the cooling pipes connected in series are adopted between the secondary microwave heating wall, the primary microwave heating wall and the secondary microwave heating wall which are arranged in sequence for liquid cooling heat dissipation.
5. The microwave heating wall for the microwave heating scarifier as claimed in claim 1, wherein the microwave shielding device is arranged around the microwave heating wall, and the microwave shielding device comprises a choke groove spring, a flexible shielding chain net I and a flexible shielding chain net II which are arranged in sequence from inside to outside.
6. The microwave heating wall for the microwave heating harrowing machine as claimed in claim 5, wherein a linear distance from the choke groove spring to the waveguide antenna is 40mm to 50mm, and a height of the choke groove spring piece is a wavelength λ of the waveguide antenna g/4, flexible shielding chain net IThe linear distance from the flexible shielding chain net I to the waveguide antenna is 80 mm-90 mm, the linear distance from the flexible shielding chain net II to the flexible shielding chain net I is 30mm, and the maximum mesh radius R of the flexible shielding chain net I and the flexible shielding chain net II is 6 mm.
7. The microwave heating wall for the microwave heating scarifier as claimed in claim 1, wherein a microwave leakage detecting device is arranged around the microwave heating wall, the microwave leakage detecting device comprises a signal collecting antenna, an impedance matching circuit, a detection circuit, an amplifying circuit and an alarm indicator lamp which are connected in sequence, the signal collecting antenna couples a leaked microwave signal and inputs the microwave signal into the impedance matching circuit, the impedance matching circuit transmits the received signal to the detection circuit, the detection circuit filters a frequency band signal which is not emitted by microwaves and then transmits the frequency band signal to the amplifying circuit, the amplifying circuit amplifies the processed signal and compares the processed signal with a preset value, the processed signal is judged and inputs a judgment result signal into the alarm circuit, and the alarm circuit determines whether to give an alarm according to the result.
8. A microwave heating scarification machine comprises a chassis walking system, wherein a rack is loaded on the chassis walking system, a cab, an auxiliary engine, a regenerant box, a cooling system, a generator set and a transformer box are sequentially arranged on the rack from front to back, a scarification device is arranged below the rack, and a regenerant spraying device is arranged in front of the scarification device.
9. The microwave heating scarifier as claimed in claim 8, wherein the top end face of the main microwave heating wall is connected with the bottom of the frame through a telescopic sleeve, the bottom end of the auxiliary microwave heating wall is connected with the bottom of the frame through a telescopic hydraulic rod, and the auxiliary microwave heating wall can be turned over by 90 degrees relative to the main microwave heating wall when the hydraulic rod is moved telescopically.
10. The microwave-heated scarifier of claim 8, wherein the cooling system provides a cooling cycle for the microwave-heated wall and circulates the regenerant back to the cooling system through the regenerant tank.
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| CN108252189B (en) * | 2018-03-13 | 2023-06-06 | 安徽工程大学 | Microwave heating asphalt pavement in-situ heat regeneration device and method |
| CN110004811B (en) * | 2019-04-29 | 2023-06-02 | 长安大学 | Hot air heating device for serial asphalt pavement and heating control method thereof |
| CN110318755B (en) * | 2019-06-13 | 2021-01-01 | 太原理工大学 | Method and device for microwave heating of upstream cracking residual mining area remaining coal pillar |
| CN111501484A (en) * | 2020-04-23 | 2020-08-07 | 江苏集萃道路工程技术与装备研究所有限公司 | Heating device for giving consideration to secondary temperature raising and pavement thermal connection of asphalt mixture |
| CN111676774B (en) * | 2020-05-08 | 2021-08-24 | 江苏集萃道路工程技术与装备研究所有限公司 | Remixer |
| CZ2020680A3 (en) * | 2020-12-15 | 2021-11-18 | FUTTEC a.s. | Method of repairing asphalt surfaces and the equipment for this |
| CN114508033A (en) * | 2022-03-21 | 2022-05-17 | 杜艳军 | Microwave heating wall and heating method thereof |
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Denomination of invention: A microwave heating rake loosening machine and its microwave heating wall Effective date of registration: 20231124 Granted publication date: 20220628 Pledgee: Bank of Jiangsu Co.,Ltd. Xuzhou Economic Development Zone sub branch Pledgor: JIANGSU JITRI ROAD ENGINEERING TECHNOLOGY AND EQUIPMENT RESEARCH INSTITUTE Co.,Ltd. Registration number: Y2023980067158 |
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