CN107254829B - Novel microwave heating re-mixing regenerator and material adding and re-mixing regeneration process thereof - Google Patents
Novel microwave heating re-mixing regenerator and material adding and re-mixing regeneration process thereof Download PDFInfo
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- CN107254829B CN107254829B CN201710666893.7A CN201710666893A CN107254829B CN 107254829 B CN107254829 B CN 107254829B CN 201710666893 A CN201710666893 A CN 201710666893A CN 107254829 B CN107254829 B CN 107254829B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 149
- 239000000463 material Substances 0.000 title claims abstract description 108
- 238000002156 mixing Methods 0.000 title claims abstract description 65
- 230000008929 regeneration Effects 0.000 title claims abstract description 47
- 238000011069 regeneration method Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 28
- 239000010426 asphalt Substances 0.000 claims abstract description 95
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000010409 ironing Methods 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
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- 230000001172 regenerating effect Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
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- 230000017525 heat dissipation Effects 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- 238000003892 spreading Methods 0.000 description 12
- 239000002826 coolant Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 238000004321 preservation Methods 0.000 description 8
- 230000007480 spreading Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
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- 239000000306 component Substances 0.000 description 3
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- 239000012492 regenerant Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
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- 238000011065 in-situ storage Methods 0.000 description 2
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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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- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention discloses a novel microwave heating remixing regenerator which comprises a chassis travelling system, a rack, a generator set, a transformer box, a microwave heating wall, a cooling system, an auxiliary engine, a hydraulic system, an electrical system, a fuel tank, a water tank, a cab, a warm mixing agent box, an aggregate device, a stirring device, a horizontal conveying device, a primary material distribution spiral, a primary leveling ironing plate, a secondary material distribution spiral and a secondary foundation paving ironing plate. The novel microwave heating remixing regenerator provided by the invention solves the problem of overweight and overlong equipment, and simultaneously uses a magnetron to heat an asphalt material, so that the problems that the temperature difference between new and old pavements is too large and the asphalt material cannot be effectively bonded are solved, and the difficult problems of weak joints and weak interfaces are easily formed. Meanwhile, the invention provides a material adding and re-mixing regeneration process, which realizes the addition of a new material for re-mixing regeneration and a new material for additional paving, has two processes of material adding and re-mixing regeneration and material adding, re-mixing and additional paving, realizes the real double-layer paving and improves the regeneration quality of the asphalt pavement.
Description
Technical Field
The invention particularly relates to a novel microwave heating re-mixing regenerator and a material adding re-mixing regeneration process thereof, belonging to the field of road maintenance equipment.
Background
In the in-situ thermal regeneration construction process, the remixing regenerator is usually arranged behind a plurality of asphalt pavement heaters and heating scarification machines and is mainly used for remixing and paving the regenerated materials to form a remixing regeneration layer.
The existing re-mixing regenerator mostly adopts a front hopper, an inclined conveying belt, a horizontal conveying belt and the like to complete the addition of a new asphalt mixture, and has the problems of overweight and overlong equipment, difficult transportation, material blockage, difficult maintenance and the like; after the new asphalt mixture and the reclaimed materials are re-mixed by the stirring device, the temperature of the asphalt mixture is generally 120-140 ℃, secondary heating and temperature raising are needed to meet the paving temperature, the secondary heating and temperature raising mostly adopts a fuel oil/gas open fire heating mode, a fuel gas infrared heating mode or a diesel oil hot air circulation heating mode, the heating temperature of the reclaimed materials is not easy to accurately control, the asphalt is easy to age and coke, a large amount of toxic blue smoke is accompanied in the construction process, and the problem of serious environmental pollution exists; most of the existing local hot recycling units only have a material adding and re-mixing recycling process, a certain proportion of new asphalt mixture cannot be added in the re-mixing process of a few re-mixing and re-spreading processes, a recycling layer is formed by adding a proper amount of regenerant and re-mixing and spreading, then a new asphalt mixture with a certain thickness is spread on the recycling layer, the true double-layer spreading is not realized, the temperature difference between new and old pavements is too large during spreading, the new and old pavements cannot be effectively bonded, weak joints and weak interfaces are easy to form, and the recycling quality of the pavements is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a novel microwave heating remixing regenerator which has good maintainability and transportability, can save a hopper and an inclined conveying belt and solves the overweight and overlong problems of equipment; furthermore, the invention provides a novel microwave heating remixing regenerator which can perform secondary heating and temperature raising on a remixed asphalt material pile to ensure that the paving temperature reaches the standard, no smoke or flame exists, the asphalt material is not aged or coked, the efficiency is high, the environment is protected, and the thermal bonding heating of the scarified asphalt pavement is performed, so that the problems that the temperature difference between new and old pavements is too large, the old and new pavements cannot be effectively bonded, and weak joints and weak interfaces are easily formed in the market are solved; furthermore, the invention provides a material adding and re-mixing regeneration process which has two processes of material adding and re-mixing regeneration and material adding and re-mixing and laying, realizes the real double-layer laying and improves the regeneration quality of the asphalt pavement.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a novel microwave heating remixing regenerator comprises a chassis traveling system, wherein a rack is accepted on the upper part of the chassis traveling system, a generator set is arranged at the front part of the rack, a plurality of groups of transformer boxes are arranged on the left side and the right side of the rack, a maintenance channel is arranged between two adjacent transformer boxes, a microwave heating wall positioned in the middle of front wheels and rear wheels is arranged below the rack, a plurality of groups of cooling systems are arranged on the left side and the right side of the generator set, an auxiliary engine is arranged at the rear part of the rack, a water tank and a hydraulic oil tank of the hydraulic system are arranged on the left side of the auxiliary engine, a cab is arranged on the right side of the auxiliary engine, an electric system and a fuel tank are respectively arranged on the left front side and the right front side of the rack, a stirring device is arranged on the left front part of the rack, a horizontal conveying device is arranged between the left supporting beam and the right supporting beam of the rack, and a material receiving port is arranged at the foremost end of the horizontal conveying device, the tail end of the machine frame is provided with a material guiding groove, and a first-stage material distribution spiral, a first-stage leveling ironing plate, a second-stage material distribution spiral and a second-stage basic paving ironing plate are sequentially arranged from front to back on the rear lower portion of the machine frame.
The microwave heating wall comprises a microwave heating frame, the top of the microwave heating frame is connected with a telescopic sleeve, the top of the telescopic sleeve is connected with the lower portion of the rack, a plurality of groups of microwave generation magnetrons which are regularly arranged according to an array are arranged in the microwave heating frame, the microwave generation magnetrons are fixed to the top of the waveguide antenna, a wave-transmitting protection plate is arranged at the lower opening of the waveguide antenna, and the wave-transmitting protection plate is fixed to the microwave heating frame.
The microwave heating wall comprises a main microwave heating wall and two auxiliary microwave heating walls symmetrically arranged on the left side and the right side of the main microwave heating wall, the main microwave heating wall is hinged with the auxiliary microwave heating walls, and the auxiliary microwave heating walls can turn over 90 degrees relative to the main microwave heating wall.
The microwave generation magnetron is internally provided with a vacuum tube in an interference fit manner and is provided with a heat dissipation sleeve, the heat dissipation sleeve is connected with a liquid inlet pipe and a liquid outlet pipe which are staggered up and down and left and right, one side of a microwave heating frame is welded with a cooling pipe I and a cooling pipe III, the other side of the microwave heating frame is welded with a cooling pipe II and a cooling pipe IV, a cooling medium sequentially passes through the cooling pipe I, the heat dissipation sleeve, the cooling pipe II, the heat dissipation sleeve, the cooling pipe III, the heat dissipation sleeve and the cooling pipe IV, and an inlet of the cooling pipe I and an outlet of the cooling pipe IV are respectively connected with a cooling system.
The cooling medium comprises water, heat conduction oil or cooling liquid for an automobile engine.
Microwave heating wall has arranged microwave shield assembly all around, microwave shield assembly includes choke groove shell fragment, flexible shielding chain net I, flexible shielding chain net II, choke groove shell fragment is located the inboard of flexible shielding chain net I, flexible shielding chain net II is located the outside of flexible shielding chain net I, flexible shielding chain net I and flexible shielding chain net II are fixed through a plurality of bolt ring shape around the microwave heating wall.
The microwave heating wall is provided with a microwave leakage detection device around, wherein the microwave leakage detection device comprises a signal acquisition antenna, an impedance matching circuit, a detection circuit, an amplification circuit and an alarm indicator lamp, wherein signals sequentially pass through the signal acquisition antenna, the impedance matching circuit, the detection circuit, the amplification circuit and the alarm indicator lamp.
The warm mixing agent in the warm mixing agent box adopts a heat conduction oil circulation heating mode, the inlet end of the heat conduction oil in the warm mixing agent box is connected with the outlet of the cooling pipe IV, and the outlet end of the heat conduction oil in the warm mixing agent box is connected with the inlet of the cooling pipe IV.
The wave-transparent protection plate is made of polytetrafluoroethylene.
A material adding and re-mixing regeneration process comprises any one of the novel microwave heating and re-mixing regeneration machine and an asphalt material heat preservation dumper, wherein the number of the asphalt material heat preservation dumper is two, one of the asphalt material heat preservation dumpers conveys a new asphalt mixture to an asphalt material pile which is gathered up after raking and loosening, the new asphalt mixture and the asphalt material pile are mixed together and then enter a stirring device, the mixture is stirred uniformly by double shafts to form a trapezoidal ridge-shaped mixture pile, then a new re-mixing regeneration layer is formed after the mixture is spread and pre-compacted by a primary material distribution spiral material distribution plate and a primary leveling ironing plate, and a regenerated asphalt pavement is obtained after rolling; when the material adding and re-mixing regeneration process is completed to form a re-mixing regeneration layer, another asphalt material heat-insulating dumper is used for conveying a new asphalt mixture to a material receiving port at the foremost end of a horizontal conveying device, the asphalt mixture is conveyed backwards under the driving of the horizontal conveying device, the asphalt mixture slides to the re-mixing regeneration layer completed by a first-level distribution spiral and a first-level leveling ironing plate through a tail material guiding groove, and a brand-new asphalt thin wearing layer is generated by heat-to-heat through the paving and prepressing of a second-level distribution spiral distribution and a second-level basic paving ironing plate, and finally the re-mixing regeneration and re-spreading double-layer asphalt pavement is obtained through rolling.
The invention has the beneficial effects that: the invention provides a novel microwave heating remixing regenerator.A stirring device is arranged on the left front part of a frame, and a unique front-mounted stirring device is adopted, so that the novel microwave heating remixing regenerator has good maintainability, omits a hopper and an inclined conveying belt, solves the overweight and overlong problems of equipment and has good transportability; the microwave heating wall comprises a main microwave heating wall and two auxiliary microwave heating walls which are symmetrically arranged on the left side and the right side of the main microwave heating wall, the main microwave heating wall adopts a 2.45GHz microwave heating magnetron to secondarily heat and raise the temperature of the asphalt material pile after being remixed, the heating depth is 150 mm-200 mm, the paving temperature reaches the standard, no smoke or flame exists, the asphalt material is not aged or coked, and the high-efficiency and environment-friendly effects are achieved; 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, 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, and the construction effect is good; the utility model provides a add material and mix regeneration technology again realizes mixing regeneration simultaneously with the help of the addition of new material and spreading with the new material of bituminous mixture heat preservation self-discharging intelligence defeated skip, possesses add material and mix regeneration again and add material and mix and add two kinds of technologies of spreading again, has realized the double-deck of true meaning and has spread, has improved bituminous paving regeneration quality.
Drawings
FIG. 1 is a front view of a novel microwave heated remixing regenerator of the present invention;
FIG. 2 is a top view of a novel microwave heated remixing regenerator of the present invention;
FIG. 3 is a perspective view (front left 45) of a novel microwave heated remixing regenerator of the present invention;
FIG. 4 is a perspective view (45 degree from right) of a novel microwave heated remixing regenerator of the present invention;
FIG. 5 is a driving state diagram of a novel microwave heating remixing regenerator of the invention;
FIG. 6 is a schematic view of a heating mesh surface structure of a microwave heating wall in the novel microwave heating remixing regenerator of the present invention;
FIG. 7 is a cross-sectional view taken at the location A-A in FIG. 5;
FIG. 8 is a cross-sectional view taken at the location B-B in FIG. 5;
FIG. 9 is a cross-sectional view taken at the position C-C of FIG. 5;
FIG. 10 is a schematic diagram of a magnetron structure in a novel microwave heating remixing regenerator of the present invention;
FIG. 11 is a schematic structural diagram of a magnetron cooling device in a novel microwave heating remixing regenerator of the invention;
FIG. 12 is a schematic view of the arrangement of a microwave shielding device in a novel microwave heating remixing regenerator of the invention;
FIG. 13 is a schematic view of the installation of a microwave flexible shielding chain net structure in the novel microwave heating remixing regenerator of the present invention;
FIG. 14 is a schematic diagram of the operation of the microwave leakage detection device in the novel microwave heating remixing regenerator of the present invention;
FIG. 15 is a circuit diagram of a magnetron working power supply of a core part in the novel microwave heating remixing regenerator of the invention;
FIG. 16 is a graph showing the time-dependent temperature rise of an asphalt pavement heated by a 2.45GHz magnetron in a novel microwave heating remixing regenerator of the invention;
FIG. 17 is a graph showing the time-dependent temperature rise of an asphalt pavement heated by a 5.8GHz magnetron in the novel microwave heating remixing regenerator.
In the figure: 1. a chassis traveling system, 2, a frame, 3, a generator set, 4, a transformer box, 5, a microwave heating wall, 5-1, a microwave heating frame, 5-2, a telescopic sleeve, 5-3, a microwave generation magnetron, 5-4, a cooling pipeline, 5-4-1, a cooling pipe I, 5-4-2, a cooling pipe II, 5-4-3, a cooling pipe III, 5-4-4, a cooling pipe IV, 5-4-5, a heat dissipation sleeve, 5-4-6, a liquid inlet pipe, 5-4-7, a liquid outlet pipe, 5-5, a waveguide antenna, 5-6, a wave-transparent protection plate, 5-7, a microwave shielding device, 5-7-1, a choke sheet, 5-7-2 and a flexible shielding chain net I, 5-7-3 parts of flexible shielding chain net II, 5-8 parts of microwave leakage detection device, 5-8-1 parts of signal acquisition antenna, 5-8-2 parts of impedance matching circuit, 5-8-3 parts of detection circuit, 5-8-4 parts of amplification circuit, 5-8-5 parts of alarm indicator lamp, 5-9 parts of main microwave heating wall, 5-10 parts of auxiliary microwave heating wall, 6 parts of cooling system, 7 parts of auxiliary engine, 8 parts of hydraulic system, 9 parts of electrical system, 10 parts of fuel tank, 11 parts of water tank, 12 parts of cab, 13 parts of warm mixing agent tank, 14 parts of aggregate device, 15 parts of stirring device, 16 parts of horizontal conveying device, 16-1 parts of material receiving port, 16-2 parts of material guiding groove, 17 parts of primary cloth spiral, 18 parts of primary leveling ironing plate, 19 parts of secondary cloth spiral, 20. the screed is paved to second grade basis, 21, bituminous paving, L1, the adjacent front and back distance about waveguide antenna end opening, L2, wave-transparent protection board to bituminous paving distance, L3, the straight-line distance of choke groove shell fragment to waveguide antenna, L4, the straight-line distance of flexible shielding chain net I to waveguide antenna, L5, the straight-line distance of flexible shielding chain net I to flexible shielding chain net II, H, the suppression piece height of choke groove shell fragment, R, the biggest mesh radius of flexible shielding chain net.
Detailed Description
The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.
As shown in fig. 1 to 5, the arrow in the figure represents the advancing direction of the novel microwave heating scarifier, and the novel microwave heating scarifier comprises a chassis walking system 1, a frame 2, a generator set 3, a transformer box 4, a microwave heating wall 5, a cooling system 6, an auxiliary engine 7, a hydraulic system 8, an electrical system 9, a fuel tank 10, a water tank 11, a cab 12, a warm mixing agent box 13, an aggregate device 14, a stirring device 15, a horizontal conveying device 16, a primary material distributing spiral 17, a primary leveling ironing plate 19, a secondary material distributing spiral and a secondary basic paving ironing plate 20.
In order to solve the problems of overweight and overlong equipment, difficult transportation, material clamping, difficult maintenance and the like of the existing remixing regenerator due to the fact that the addition of a new asphalt mixture is completed by matching a front hopper, an inclined material conveying belt, a horizontal material conveying belt and the like, the arrangement mode adopted by the embodiment is that a front axle and a rear axle of a chassis walking system 1 both adopt drive axles, the upper parts of the front axle and the rear axle are used for bearing a frame 2 and have stepless speed change and all-wheel steering functions, a generator set 3 is positioned at the front part of the frame 2, a plurality of groups of transformer boxes 4 are arranged at the left side and the right side of the frame 2, a maintenance channel is arranged between the adjacent transformer boxes 4, a microwave heating wall 5 is positioned below the frame 2, the middle parts of the front wheel and the rear wheel, a plurality of groups of cooling systems 6 are arranged at the left side and the right side of the generator set 3, an auxiliary engine 7 is positioned at the rear part of the frame 2, a cab 12 is arranged at the right side of the auxiliary engine 7, and a water tank 11 and a hydraulic oil tank of a hydraulic system 8 are arranged at the left side, an electrical system 9 and a fuel tank 10 are respectively positioned on the left front side and the right front side of a rack 2, a warm mixing box 13 is positioned on the upper plane of the left rear part of the rack 2 and is used for conveying warm mixing agents to a stirring device 15 in real time, the stirring device 15 is positioned at the forefront part of the lower part of the rack 2, an aggregate device 14 is arranged at the front part of the stirring device 15 and is used for assisting asphalt aggregates to enter the stirring device 15, the stirring device 15 adopts a double-shaft forced mixing mode, a horizontal conveying device 16 is arranged between a left supporting beam and a right supporting beam of the rack 2, a material receiving port 16-1 is arranged at the forefront end, a material guiding groove 16-2 is arranged at the farthest end, a primary cloth screw 17 and a primary leveling ironing plate 18 are positioned below the rack 2, and a secondary cloth screw 19 and a secondary basic paving ironing plate 20 are positioned behind the primary leveling ironing plate 18 behind a rear wheel.
As shown in figures 6 to 9, in order to solve the problems that the prior remixing regenerator mostly adopts the fuel oil/gas open fire heating, fuel gas infrared heating or diesel hot air circulation heating mode for secondary heating and temperature raising of the remixed regenerative material pile, the heating temperature of the regenerative material is not easy to be accurately controlled, the asphalt is easy to age and coke, and the construction process is mostly accompanied by a large amount of toxic blue smoke, thereby causing serious environmental pollution, the invention introduces a novel microwave heating technology, a microwave heating wall 5 comprises a microwave heating frame 5-1, a telescopic sleeve 5-2, a microwave generation magnetron 5-3, a cooling pipeline 5-4, a waveguide antenna 5-5, a wave-transparent protection plate 5-6, a microwave shielding device 5-7 and a microwave leakage detection device 5-8, the microwave heating wall 5 consists of a main microwave heating wall and two auxiliary microwave heating walls which are symmetrical left and right, the auxiliary microwave heating wall can be turned over by 90 degrees relative to the main microwave heating wall, and the telescopic sleeve 5-2 can adjust the height of the microwave heating wall 5 from the ground to 50-350 mm.
The microwave generating magnetron 5-3 is a core component of the microwave heating device, and the specific structure is shown in fig. 10, and the working power supply circuit diagram is shown in fig. 15. The top of a microwave heating frame 5-1 is connected with a telescopic sleeve 5-2, the bottom is fixed with a waveguide antenna 5-5, a plurality of groups of microwave generating magnetrons 5-3, the waveguide antenna 5-5 and a wave-transparent protective plate 5-6 are arranged according to a certain array rule, the microwave generating magnetrons 5-3 are fixed on the top of the waveguide antenna 5-5, the microwave generating magnetrons 5-3 are two, one microwave generating magnetron 5-3 is assembled on a main microwave heating wall and used for generating microwave energy with the frequency of 2.45GHz to heat the asphalt pile gathered after scarification, the heating depth is 150 mm-200 mm, the other microwave generating magnetron 5-3 is assembled on an auxiliary microwave heating wall and used for generating microwave energy with the frequency of 5.8GHz to realize the thermal bonding heating of the asphalt pavement after scarification, the heating depth is 75 mm-80 mm, the waveguide antenna 5-5 and the wave-transparent protection plate 5-6 are used for transmitting microwave energy of two frequencies, the distances L1 between the adjacent left and right front and back of the lower opening of the waveguide antenna 5-5 are 30 mm-50 mm, the waveguide antenna 5-5 type adopts 90-degree bent waveguides, the wave-transparent protection plate 5-6 is arranged at the lower opening of the waveguide antenna 5-5, the wave-transparent protection plate 5-6 is made of polytetrafluoroethylene, and the distance L2 from the wave-transparent protection plate 5-6 to the asphalt pavement 21 is 60 mm-80 mm. The graphs of the temperature rise of the asphalt pavement heated by the 2.45GHz magnetron 5-3 and the 5.8GHz magnetron 5-3 along with time are respectively shown in the graph of fig. 16 and the graph of fig. 17.
As shown in fig. 11, the magnetron is easily damaged due to heating during operation, and needs to be cooled, so a liquid cooling heat dissipation mode is introduced, the cooling liquid flows in the direction indicated by the arrow in fig. 11, the liquid cooling heat dissipation mode system has a simple and compact structure, is convenient to install, maintain and repair, can effectively solve the problems of poor cooling performance of the air cooling heat dissipation mode, difficulty in designing and processing an air duct and the like, has uniform heat dissipation and no dead angle, can effectively control the temperature of the cooling liquid, and improves the working stability of key components such as the magnetron and the like. The microwave generation magnetron 5-3 adopts a liquid cooling magnetron, the cooling system 6 is the microwave generation magnetron 5-3 for cooling, the cooling pipeline 5-4 is composed of a cooling pipe I5-4-1, a cooling pipe II 5-4-2, a cooling pipe III 5-4-3, a cooling pipe IV 5-4-4, a heat dissipation sleeve 5-4-5, a liquid inlet pipe 5-4-6 and a liquid outlet pipe 5-4-7, the cooling pipe I5-4-1, the cooling pipe II 5-4-2, the cooling pipe III 5-4-3 and the cooling pipe IV 5-4-4 are welded on a microwave heating frame 5-1, the heat dissipation sleeve 5-4-5 is in interference fit with a vacuum pipe arranged in the microwave generation magnetron 5-3, the liquid inlet pipe 5-4-6 and the liquid outlet pipe 5-4-7 are staggered up and down and left and right, the low-temperature cooling medium enters through the pipe with low liquid level, and the high-temperature cooling medium flows out through the pipe with high liquid level. Wherein, coolant is water, conduction oil or coolant for automobile engine, and coolant for automobile engine is mainly applicable to northern cold areas, and the purpose is to prevent that the coolant that leads to because of ambient temperature hangs down freezes, causes the cooling inefficacy and leads to the fact components and parts to damage, can not normally work. The water is used as a cooling medium and is suitable for the temperature of more than 10 ℃, the heat conduction oil is suitable for the auxiliary heating of the vehicle-mounted regenerant, and the cooling liquid for the automobile engine is suitable for various working conditions, especially under extremely cold severe conditions. The user may select a suitable cooling medium according to specific conditions.
As shown in fig. 12 and 13, in order to obtain a good microwave shielding effect, a multi-layer shielding body shielding design of a flexible shielding chain net and a choke groove shrapnel is adopted, a microwave shielding device 5-7 is arranged at the periphery of a microwave heating wall 5 and consists of four groups of choke groove shrapnels 5-7-1, a flexible shielding chain net I5-7-2 and a flexible shielding chain net II 5-7-3, the choke groove shrapnels 5-7-1 are positioned at the inner side of the flexible shielding chain net I5-7-2 and are used as a first layer of microwave leakage protection, the linear distance L3 from the choke groove shrapnel 5-5 is 40 mm-50 mm, the height H of a suppression sheet of the choke groove shrapnel 5-7-1 is 5 wavelength lambdag/4 of a waveguide antenna, the flexible shielding chain net I5-7-2 is annularly fixed at the periphery of the microwave heating wall 5 through a plurality of bolts, the linear distance L4 from the waveguide antenna 5-5 to the waveguide antenna is 80-90 mm, the flexible shielding chain net II 5-7-3 is located on the outer side of the flexible shielding chain net I5-7-2 and is annularly fixed on the periphery of the microwave heating wall 5 through a plurality of bolts, the linear distance L5 from the flexible shielding chain net I5-7-2 to the flexible shielding chain net I5-7-2 is 30mm, and 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 6 mm. After the flexible shielding chain net and the choke groove shrapnel are combined in a multi-layer shielding mode, the microwave leakage rate at the position of 5cm outside the microwave heating wall can be controlled within 2mW/cm 2.
As shown in FIG. 14, the microwave leakage detecting device 5-8 is arranged around the microwave heating wall 5 and is composed of a signal collecting antenna 5-8-1, an impedance matching circuit 5-8-2, a detection circuit 5-8-3, an amplifying circuit 5-8-4 and an alarm indicator lamp 5-8-5. When the device works, a signal acquisition antenna 5-8-1 couples leaked microwave signals and inputs the microwave signals into an impedance matching circuit 5-8-2, the impedance matching circuit 5-8-2 transmits the received signals to a dielectric filter, the dielectric filter filters frequency band signals sent by non-microwave equipment and transmits the frequency band signals to a detection circuit 5-8-3, the detection circuit 5-8-3 processes the signals sent by the dielectric filter and then amplifies, compares and judges the signals with preset values and inputs judgment result signals into an alarm circuit 5-8-5, the alarm circuit 5-8-5 determines whether to alarm or not to prompt according to the detection result of the detection circuit 5-8-3, if the monitoring result of the detection circuit 5-8-3 reaches a preset gate threshold value, the alarm circuit 5-8-5 gives an alarm indication, otherwise, the alarm is not given.
Furthermore, the warm mixing agent in the warm mixing agent box 13 adopts a heat conduction oil circulation heating mode, and heat released by the operation of the microwave generation magnetron 5-3 can be introduced into the warm mixing agent box 13 through a heat conduction oil circulation pipeline to be used as a heat source, so that the heating of the warm mixing agent is realized, and the cooling of the microwave generation magnetron 5-3 is realized.
In order to overcome the defects that most of the existing in-situ heat regeneration units only have a material adding and re-mixing regeneration process, a certain proportion of new asphalt mixture cannot be added in the re-mixing process of a few re-mixing and re-spreading processes, a proper amount of regenerant is added for re-mixing and spreading to form a regeneration layer, then a new asphalt mixture with a certain thickness is additionally spread on the regeneration layer, the true double-layer spreading is not realized, the temperature difference between new and old pavements is too large during spreading, the new and old pavements cannot be effectively bonded, weak seams and weak interfaces are easy to form, and the regeneration quality of the pavements is influenced. The invention provides a novel microwave heating re-mixing regenerator, which can realize two processes of material adding re-mixing regeneration and material adding re-mixing and laying.
A material adding and re-stirring regeneration process comprises the following steps: the asphalt material heat-preservation dumper conveys new asphalt mixture to an asphalt material pile which is gathered after scarification, the asphalt mixture and the asphalt material pile are mixed together and then enter a stirring device 15, the mixture is stirred uniformly by double shafts in a forced mode to form a trapezoid ridge-shaped mixture pile, the height of the mixture pile is 150 mm-200 mm, the width of the bottom of the mixture pile is 1100 mm-1300 mm, the mixture pile is spread and pre-compacted by a first-stage material distribution spiral 17 and a first-stage leveling ironing plate 18 to form a new re-mixing regeneration layer, and the regenerated asphalt pavement is obtained after rolling.
When the material adding and re-mixing regeneration process is completed to form a re-mixing regeneration layer, another asphalt material heat-insulating dumper is used for conveying a new asphalt mixture to a material receiving port 16-1 at the foremost end of a horizontal conveying device 16, the asphalt mixture is conveyed backwards under the driving of the horizontal conveying device 16, the new asphalt mixture slides onto the re-mixing regeneration layer completed by a primary distribution screw 17 and a primary leveling ironing plate 18 through a material guiding groove 16-2 at the tail end, a brand-new asphalt thin wearing layer is generated by heat-to-heat through the distribution of a secondary distribution screw 19 and the paving pre-pressing of a secondary basic paving ironing plate 20, and finally the re-mixing regeneration additional-spreading double-layer asphalt pavement is obtained through rolling.
The working principle of the invention is as follows:
the novel microwave heating re-mixing regenerating machine is matched with a plurality of asphalt pavement microwave heating machines and heating scarification machines for use, and an asphalt material heat-preservation dumper is adopted for conveying a new asphalt mixture.
The asphalt material heat-preservation dumper conveys new asphalt mixture to an asphalt material pile which is gathered after being raked by the heating raking and loosening machine, the asphalt mixture and the asphalt material pile are mixed together and then enter the preposed stirring device 15, the mixture is stirred uniformly by double shafts to form a trapezoid ridge-shaped mixed material pile, the height of the material pile is 150 mm-200 mm, and the width of the bottom of the material pile is 1100 mm-1300 mm.
And (3) heating the material pile formed after re-mixing and heating the road surface subjected to scarification by thermal bonding by adopting a microwave heating technology. The generator set 3 converts chemical energy of diesel 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 magnetron, a half-wave voltage-doubling rectifying circuit formed by the high-voltage transformer and the rectifier diode provides 4.65kV anode voltage for the magnetron, the electric energy is converted into continuous electromagnetic energy, the electromagnetic energy is transmitted and permeated into asphalt pavement media in a wave mode through the media such as a waveguide and the like, the media are lost and generate heat, and the temperature of the asphalt pavement is increased. In the heating process, the continuous work of the magnetron for several hours every day is considered, in order to ensure the stable heating efficiency of the magnetron, the embodiment adopts the liquid-cooled magnetron with two frequencies of 2.45GHz and 5.8GHz, the cooling medium is water or heat conducting oil, the problems of poor cooling performance of an air cooling heat dissipation mode, difficult design and processing of an air channel and the like are effectively solved, the heat dissipation is uniform, no dead angle exists, the temperature of cooling liquid can be effectively controlled, and the working stability of key components such as the magnetron and the like is improved. And a heat conduction oil circulation pipeline is introduced into the warm mixing agent box 13, so that the warm mixing agent is heated, and the microwave generation magnetron 5-3 is cooled. In order to ensure that the construction temperature of the asphalt material reaches the standard and the good combination temperature of new and old asphalt materials is ensured, a microwave generation magnetron 5-3 with the frequency of 2.45GHz is assembled on a main microwave heating wall 5-9 to realize the heating of the asphalt material pile gathered after scarification, and the heating depth is 150 mm-200 mm; a microwave generation magnetron 5-3 with the frequency of 5.8GHz is assembled on an auxiliary microwave heating wall 5-10 to realize the thermal bonding heating of the asphalt pavement scarified by the heating scarifier, and the heating depth is 75-80 mm. The microwave heating element has particularly important working safety, and the invention adopts the protection design of the flexible shielding chain net and the choke groove elastic sheet multilayer shield body, has good shielding effect on high-frequency and low-frequency electromagnetic fields, obtains good microwave shielding effect and has good safety protection guarantee.
And then, a new re-mixing regeneration layer is formed after the first-stage spiral material distribution and the first-stage leveling ironing plate are paved and pre-compacted, and the regenerated asphalt pavement is obtained after rolling, so that the material adding and re-mixing regeneration process is realized.
When the material adding, re-stirring and paving process is adopted, when a re-stirring regeneration layer is formed by the material adding, re-stirring and re-paving process, another asphalt material heat-insulating dumper is used for conveying a new asphalt mixture to a material receiving port at the foremost end of a horizontal conveying device, the asphalt mixture is conveyed backwards under the driving of the horizontal conveying device, the new asphalt mixture slides onto the re-stirring regeneration layer completed by a primary distribution spiral and a primary leveling ironing plate through a material guiding groove at the tail end, a brand new asphalt thin wearing layer is generated by heat-to-heat through the paving and pre-pressing of a secondary distribution spiral distribution and a secondary basic paving ironing plate, and finally the re-stirring, regenerating and paving double-layer asphalt pavement is obtained through rolling.
The invention provides a novel microwave heating remixing regenerator. The novel microwave heating re-mixing regenerator is matched with a plurality of asphalt pavement microwave heaters and heating scarification machines for use, adopts unique front-mounted stirring equipment, has good maintainability, saves a hopper and an inclined conveying belt, solves the overweight and overlong problems of the equipment and has good transportability; the addition of the new materials for remixing regeneration and the new materials for paving is realized by means of the asphalt mixture heat-preservation self-discharging intelligent conveying vehicle, two processes of material adding remixing regeneration and material adding remixing paving are provided, the real double-layer paving is realized, and the asphalt pavement regeneration quality is improved; a 2.45GHz microwave heating magnetron is adopted to secondarily heat and raise the temperature of the asphalt material pile after re-mixing, the heating depth is 150-200 mm, the paving temperature reaches the standard, no smoke or flame is generated, and the asphalt material is not aged or coked, so that the asphalt material 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, 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, weak joints and weak interfaces are easy to form are solved, and the construction effect is good.
Claims (4)
1. The utility model provides a microwave heating remixes regenerating unit which characterized in that: comprises a chassis walking system (1), a frame (2) is accepted on the upper portion of the chassis walking system (1), a generator set (3) is arranged on the front portion of the frame (2), a plurality of sets of transformer boxes (4) are arranged on the left side and the right side of the frame (2), a maintenance channel is arranged between every two adjacent transformer boxes (4), a microwave heating wall (5) positioned in the middle of front and rear wheels is arranged below the frame (2), a plurality of sets of cooling systems (6) are arranged on the left side and the right side of the generator set (3), an auxiliary engine (7) is arranged at the rear portion of the frame (2), a water tank (11) and a hydraulic oil tank of a hydraulic system (8) are arranged on the left side of the auxiliary engine (7), a cab (12) is arranged on the right side, and an electric system (9) and a fuel tank (10) are respectively arranged on the left front side and the right front side of the frame (2), a stirring device (15) is arranged on the left front part of the rack (2), a horizontal conveying device (16) is arranged between a left supporting beam and a right supporting beam of the rack (2), a material receiving port (16-1) is arranged at the foremost end of the horizontal conveying device (16), a material guiding groove (16-2) is arranged at the rearmost end of the horizontal conveying device, and a primary distribution spiral (17), a primary leveling ironing plate (18), a secondary distribution spiral (19) and a secondary basic paving ironing plate (20) are sequentially arranged below the rear part of the rack (2) from front to rear; the microwave heating wall (5) 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 top of the telescopic sleeve (5-2) is connected with the lower part of the rack (2), a plurality of groups of microwave generation magnetrons (5-3) which are regularly arranged according to an array are arranged in the microwave heating frame (5-1), the microwave generation magnetrons (5-3) are fixed on the top of a waveguide antenna (5-5), a wave-transparent protective plate (5-6) is arranged at the lower opening of the waveguide antenna (5-5), and the wave-transparent protective plate (5-6) is fixed with the microwave heating frame (5-1); the microwave heating wall (5) comprises a main microwave heating wall and two auxiliary microwave heating walls which are symmetrically arranged on the left side and the right side of the main microwave heating wall, the main microwave heating wall is hinged with the auxiliary microwave heating walls, and the auxiliary microwave heating walls are turned over for 90 degrees relative to the main microwave heating wall; the frequency of the microwave energy generated by the microwave generating magnetron (5-3) on the main microwave heating wall is 2.45GHz, and the frequency of the microwave energy generated by the microwave generating magnetron (5-3) on the auxiliary microwave heating wall is 5.8 GHz; the microwave heating wall (5) is provided with microwave shielding devices (5-7) around, the microwave shielding devices (5-7) comprise choke groove elastic sheets (5-7-1), flexible shielding chain nets I (5-7-2) and flexible shielding chain nets II (5-7-3), the choke groove elastic sheet (5-7-1) is positioned at the inner side of the flexible shielding chain net I (5-7-2), the flexible shielding chain net II (5-7-3) is positioned at the outer side of the flexible shielding chain net I (5-7-2), the flexible shielding chain net I (5-7-2) and the flexible shielding chain net II (5-7-3) are annularly fixed on the periphery of the microwave heating wall (5) through a plurality of bolts.
2. The microwave heating reclaiming machine of claim 1, wherein: microwave leakage detection devices (5-8) are arranged around the microwave heating wall (5), and each microwave leakage detection device (5-8) comprises 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 enable signals to sequentially pass through.
3. The microwave heating remix regenerator according to claim 1, characterized in that: the wave-transparent protection plates (5-6) are made of polytetrafluoroethylene.
4. A material adding and re-mixing regeneration process is characterized in that: the microwave heating remixing regenerator and the asphalt material heat-preserving dump truck as claimed in any one of claims 1 to 3, wherein the number of the asphalt material heat-preserving dump trucks is two, one of the asphalt material heat-preserving dump trucks conveys a new asphalt mixture to an asphalt material pile which is raked and loosened, the two asphalt materials are mixed together and then enter a stirring device (15), the mixture is stirred uniformly by double shafts to form a trapezoidal ridge-shaped mixed material pile, then the mixture is spread and pre-compacted by a first-stage material distribution spiral (17) material distribution and a first-stage leveling ironing plate (18) to form a new remixing regenerating layer, and a regenerated asphalt pavement is obtained after rolling; when the material adding and re-mixing regeneration process is completed to form a re-mixing regeneration layer, another asphalt material heat-insulating dumper is used for conveying a new asphalt mixture to a material receiving port (16-1) at the foremost end of a horizontal conveying device (16), the asphalt mixture is conveyed backwards under the driving of the horizontal conveying device (16), slides onto the re-mixing regeneration layer completed by a first-level distribution screw (17) and a first-level leveling ironing plate (18) through a material guiding groove (16-2) at the tail end, is paved and pre-pressed by a second-level distribution screw (19) and a second-level basic paving ironing plate (20), so that a brand-new asphalt thin wearing layer is generated by heat to heat, and finally, a re-mixing regeneration and paving double-layer asphalt pavement is obtained through rolling.
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| CN107675581A (en) * | 2017-10-26 | 2018-02-09 | 江苏集萃道路工程技术与装备研究所有限公司 | A kind of hot in-plant reclaimed asphalt mixture production equipment and process |
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| CN101392498A (en) * | 2008-10-31 | 2009-03-25 | 镇江华晨华通路面机械有限公司（中外合资） | Microwave heating wall of tar pavement maintenance car |
| CN103763805A (en) * | 2013-11-25 | 2014-04-30 | 广东易山重工股份有限公司 | Microwave heating device adopting air cooling |
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Denomination of invention: A new type of microwave heating remixing and regeneration machine and its additive remixing and regeneration process Effective date of registration: 20231124 Granted publication date: 20220614 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: Y2023980067162 |
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