CN205604042U - Hot -blast regenerating unit on spot that heats of bituminous paving fuel - Google Patents

Abstract

The utility model discloses an in-situ thermal regeneration device for asphalt pavement, which comprises a first heating machine, a second heating machine and a regenerative mixing paver, and the first heating machine, the second heating machine and the regenerative mixing paver are in sequence Cooperate continuously to work forward; the first heating machine and the second heating machine are equipped with fuel hot air heating devices, and the fuel oil hot air heating devices include a furnace, a burner and a hot air distribution plate, and a hot air delivery channel is arranged on one side of the furnace. The hot-blast conveying channel communicates with the hot-blast distribution plate, and the hot-blast distribution plate is provided with a blowing hole, and one end of the hot-blast distribution plate is provided with a return air suction port, which communicates with the furnace through the return air passage. The utility model adopts a layered heating method, which is divided into two layers and heated twice to loosen the rake. The heating efficiency is obviously improved, and the temperature is significantly lower than that of the traditional asphalt heater at 140°C. The black dust of asphalt produced by high temperature does not exist, and the road surface can be regenerated. The heating is more uniform, which can greatly save heating fuel.

Description

An in-situ regeneration device for hot air heating of fuel oil on asphalt pavement

technical field

The utility model relates to an asphalt pavement construction device, in particular to an in-situ thermal regeneration device for the asphalt pavement fuel oil hot air layered heating raking and moving mixing.

Background technique

At present, the existing pavement heating units at home and abroad mostly adopt the method of directly heating the original pavement. Since the recycled surface layer is generally 4-6 cm thick, it takes a certain amount of time and enough energy to transfer the heat energy to the bottom. The problem is that the temperature of the 1-2 cm thick asphalt mixture on the top of the asphalt pavement is too high, generally reaching 200 °C. However, the temperature of the asphalt layer at the lower 3-6 cm is only about 80°C, and the uneven heating of the overall pavement is very serious; three heating machines are needed to reheat the reclaimed pavement back and forth to reach the construction temperature, resulting in a lot of waste of fuel; asphalt pavement will generate a lot of Black asphalt smoke and dust pollute the environment, which is neither economical nor environmentally friendly.

Contents of the invention

The purpose of the utility model is to provide an on-site regeneration device for hot air heating of fuel oil on asphalt pavement.

The technical solution adopted in the utility model is:

An on-site regeneration device for hot air heating of asphalt pavement, including a first heating machine, a second heating machine and a regenerative mixing paver, and the first heating machine, the second heating machine and the regenerative mixing paver are continuously coordinated in sequence Work forward; the first heating machine is equipped with a fuel hot air heating device for heating the asphalt pavement with a thickness of 1-2 cm, and the heated asphalt pavement is raked to a depth of 1-2 cm and collected as the first layer of regeneration Raking device for materials; the second heating machine is provided with a fuel hot air heating device for heating the asphalt pavement with a thickness of 2-6 cm on the road surface, which is used to rake the heated asphalt pavement to a depth of 2-6 cm and gather it together as the second The raking device for the second layer of recycled materials, and the recycled material transfer device that transfers the first layer of recycled materials gathered by the first heating machine to the top of the second layer of recycled materials; the regenerative mixing paver is equipped with heating and mixing The drum, together with the recycled material collection device that collects the first layer of recycled material and the second layer of recycled material into the heating mixing drum, and the cloth spreading device that spreads the mixed material on the road surface, is heated A flame heater is arranged on the mixing drum; the fuel hot air heating device includes a furnace, a burner and a hot air distribution plate, an inner sleeve is arranged inside the furnace, and the burner is arranged at one end of the inner sleeve, and the burner It is connected to the heating fuel chamber through the oil pipeline, and a hot air conveying channel connected with the interior of the furnace is provided on one side of the furnace, and the hot air conveying channel is connected to the hot air distribution plate, and a blowing hole is arranged on the hot air distribution plate, and one end of the hot air distribution plate is provided with a The return air suction port communicates with the furnace through the return air passage, and a fan is arranged on the return air passage.

Preferably, the recycled material transfer device includes a receiving bucket, an inclined feeding conveyor and a horizontal conveyor belt. The bottom end of the feeding conveyor and the top of the inclined feeding conveyor are connected to one end of the horizontal conveyor belt, and the other end of the horizontal conveyor belt extends to the discharge port at the rear of the second heating machine.

Preferably, the regenerative mixing paver also includes an adding hopper and a horizontal mixing tank for the new asphalt mixture, the adding hopper is conveyed to the heating and mixing drum through the material conveyor belt, and the recycled material mixed by the heating and mixing drum is The outlet of the heated mixing drum is transported to the horizontal mixing tank.

Preferably, a regenerant spraying device is installed on the top of the horizontal mixing tank, and the inside of the horizontal mixing tank is provided with rotating blades, and the mixed materials of the horizontal mixing tank are transported to the cloth paving through the outlet of the horizontal mixing tank device.

Preferably, the heating and mixing drum has a length of 5-15 meters and a width of 3-5 meters, and the heating and mixing drum is arranged obliquely with an inclination angle of 1-6 degrees.

Preferably, the recycled material collection device includes a receiving bucket, an inclined feeding conveyor and a horizontal conveyor belt. The bottom end of the feeding conveyor and the top end of the inclined feeding conveyor are connected to one end of the horizontal conveyor belt, and the other end of the horizontal conveyor belt extends to the feeding port of the heating and mixing drum.

Preferably, a thermal insulation material layer is provided on the outside of the furnace.

Preferably, the hot air distribution plate includes a telescopic tube and a wind-out static plenum, and the blowing holes are uniformly arranged at the bottom of the telescopic tube and the wind-out static plenum.

The beneficial technical effect of the utility model is:

(1) The utility model adopts layered heating. First, the first heating machine heats the road surface to 70--80°C. A set of raking device is installed at the rear of the first heating machine to rake the heated road surface for 1 -2 cm and use the collection device inside the raking device to collect the raked recycled materials; the second heating machine is equipped with a recycled material transfer device to move the recycled materials collected by the first heating machine to the rear of the heating machine. The heating plate at the lower part of the second heating machine heats the road surface, and the heating temperature is 70-80°C. pine, the heating efficiency is significantly improved, and the temperature is significantly lower than that of the traditional asphalt heater at 140°C, and the black dust of asphalt produced by high temperature does not exist, and the regenerated road surface is heated more evenly, which can greatly save heating fuel. The utility model adopts two heating machines with different functions, which not only saves cost, but also achieves the effect of getting twice the result with half the effort, saves energy, eliminates asphalt smoke and dust, and has obvious social and economic benefits.

(2) The regenerative mixing paver of the utility model is equipped with an asphalt reclaimed material collection device, and the regenerated materials gathered by the first and second heating machines are lifted into the heating and mixing drum of the regenerative mixing paver, and the regenerated The reheated material is reheated, and the temperature of the regenerated material after heating is raised to 140-160°C. At the same time, the heat generated by the heater is recovered, 50% of which is used for the heating plate at the front of the recycler to heat and maintain the road surface, and the other 50% of the heat is introduced to the heater for secondary combustion in the drum; transport the heated regenerated material to the horizontal mixing tank at the middle and rear of the regenerator for forced mixing, and spray the regenerant, and the regenerated mixture after mixing is uniform and comprehensive. The mechanical indicators fully meet the requirements of national standards, and the cloth paving device at the rear of the recycling machine is used for paving. The utility model collects and reheats the regenerated mixture to ensure the uniform temperature of the regenerated mixture, fully ensures the uniformity of the regenerated material mixing, and improves the final paving and rolling temperature, so as to fully guarantee the regenerated road surface the quality of.

(3) This utility model utilizes three sets of devices including the first heating machine, the second heating machine and the regenerative mixing paver, which fully changes the difficulties of low temperature and difficult quality assurance when the traditional regenerative machine paves recycled materials, and greatly improves Improve the quality of the pavement after regeneration, save energy at the same time, and enhance the competitiveness of independent innovation.

(4) The utility model adopts fuel combustion to heat circulating hot air, and then the circulating hot air is directly blown to the asphalt road surface through the air distribution holes on the hot air distribution plate to heat the road surface. The hot air generated by heating reaches 800-900 degrees Celsius, which is good for The heating effect of the road surface is good, the heating temperature is controllable, almost all the hot air after heating is recycled, the heat loss is small, and energy is saved.

(5) The utility model adds a smoke treatment device above the hot air distribution plate to effectively treat the hot air leaked during the heating process, eliminate asphalt smoke, and has remarkable environmental protection benefits.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is the structural representation of the first heating machine;

Fig. 2 is the structural representation of the second heating machine;

Fig. 3 is a cross-sectional view of trapezoidal ridge-shaped recycled materials stacked on the road surface after the first and second heating machines work;

Fig. 4 is a structural schematic diagram of the recycled material transfer device in the second heating machine and the recycled material collecting device in the recycled mixing paver;

Fig. 5 is the structural representation of regeneration mixing paver;

Fig. 6 is a structural schematic diagram of the heating mixing drum and the hot air recovery part in the regenerative mixing paver;

Fig. 7 is that three machines of the utility model cooperate to advance continuously in order;

Fig. 8 is a structural schematic diagram of a fuel oil hot air heating device;

Fig. 9 is a schematic diagram of the structure of the hot air distribution plate in the utility model.

detailed description

With reference to the accompanying drawings, an in-situ thermal regeneration device for asphalt pavement includes a first heating machine 1 , a second heating machine 2 and a regenerative mixing paver 3 . The first heating machine 1, the second heating machine 2 and the regenerative mixing paver 3 work together in sequence, as shown in FIG. 7 .

As shown in FIG. 1 , the first heating machine 1 includes a vehicle body 101 on which a fuel hot air heating device, a raking device 102 , a power running device and an operating system 103 are installed. The fuel hot air heating device includes a heating plate 104 and a heating fuel chamber 105 . The heating plate 104 is installed at the middle and lower part of the vehicle body, a smoke and dust conveying pipe 106 is arranged above the heating plate 104 , and a smoke and dust processing device 107 is arranged at the tail end of the smoke and dust conveying pipe 106 . The power traveling device includes an engine 108, wheels 109 and the like. The first heating machine 1 can move back and forth and left and right. When working, the heating plate 104 at the bottom of the heating machine is used to heat the asphalt road. The heating plate 104 at the middle and lower part of the first heating machine 1 is used to heat the 1-2 cm thick asphalt pavement, and heat the asphalt pavement to 70--80°C. The raking device 102 in the middle of the first heating machine 1 is used to rake the asphalt pavement to a depth of 0-2 cm and collect it in the middle of the heating machine. As the heating machine moves forward, a trapezoidal ridge-shaped recycled material is formed in the middle of the recycled road surface Stack the straps, as shown in Figure 3. Because this heating machine only heats the asphalt pavement to about 70-80°C, no asphalt smoke will be generated, and the asphalt mixture on the pavement will soften at the same time. The asphalt in the low-temperature road surface is not aged by high temperature, which fully guarantees the quality of subsequent recycled materials.

As shown in FIG. 2 , the second heating machine 2 includes a vehicle body 201 on which a fuel hot air heating device, a raking device 202 , a recycled material transfer device 203 , a power traveling device and an operating system 204 are installed. The fuel hot air heating device includes a heating plate 205 and a heating fuel chamber 206 . The heating plate 205 is installed at the middle and lower part of the vehicle body 201 , above the heating plate 205 is provided a smoke and dust conveying pipe 207 , and the tail end of the smoke and dust conveying pipe 207 is provided with a smoke and dust processing device 208 . The power running device includes an engine 209, wheels 2010 and the like. As shown in FIG. 4 , the recycled material transfer device 203 includes a receiving bucket 2031 , an inclined feeding conveyor 2032 and a horizontal conveyor belt 2033 , the inclined feeding conveyor 2032 is arranged obliquely, and a scraper 2034 is arranged on it. The receiving bucket 2031 is arranged on the bottom of the inclined feeding conveyor 2032, the top of the inclined feeding conveyor 2032 is connected to one end of the horizontal conveyor belt 2033, and the other end of the horizontal conveyor belt 2033 extends to the rear of the second heating machine 2 Outlet. The second heating machine 2 can move back and forth and left and right by itself. Firstly, the regenerated material transfer device 203 at the front of the second heating machine 2 is used to collect the trapezoidal ridge-shaped regenerated materials formed by the forward work of the first heating machine. The receiving bucket 2031 Using the forward thrust of the heating machine, shovel the ridge-shaped recycled materials into the inclined feeding conveyor 2032 with a scraper, lift the recycled materials to the middle of the heating machine and transport them to the rear outlet 2011 of the heating machine through the horizontal conveyor belt 2033 . The heating plate 205 at the middle and lower part of the second heating machine is used to heat the asphalt pavement with a thickness of 2-6 cm. The heating temperature is 70-80° C., and the running speed of the heating machine is 0-10 km/hour. The raking device 202 at the rear of the second heating machine rakes the asphalt pavement to a depth of 2-6 cm, and then collects the recycled material at the rear of the raking device. As the heating machine moves forward, a strip is formed in the middle of the regenerated road surface. Trapezoidal ridge-shaped recycled material stacking belt, as shown in Figure 3. The regenerated asphalt mixture of the first heating machine collected from the front end of the second heating machine 2 falls on the raked recycled asphalt mixture of the second heating machine from the outlet 2011 at the rear of the heating machine, forming layers of the first and second heating machines The heated and regenerated trapezoidal ridge-shaped regenerated material is used for the regenerated mixing paver 3 . The second heating machine 2 heats the pavement to about 70-80°C, without producing asphalt smoke, and at the same time, the pavement asphalt mixture is softened, and the gradation and gravel of the original pavement are not damaged while raking, and the temperature of the recycled material is consistent And the uniformity of recycled materials is significantly improved compared with traditional recycling equipment.

As shown in Figures 5-6, the regenerative mixing paver 3 includes a vehicle body 301, on which a new asphalt mixture addition hopper 302, a heating and mixing drum 303, a recycled material collection device 304, and a horizontal mixing tank are installed. 305 , cloth spreading device, power traveling device and operating system 306 . The adding hopper 302 is conveyed to the heating and mixing drum 303 through the material conveyor belt, and the recycled material mixed by the heating and mixing drum is conveyed to the horizontal mixing tank 305 through the outlet 3031 of the heating and mixing drum. The heating and mixing drum 303 has a length of 5-15 meters and a width of 3-5 meters. The heating and mixing drum 303 is arranged in an inclined arrangement with a high front and a low rear, with an inclination angle of 1-6 degrees. , The heating and mixing drum 303 can rotate by itself, and a flame heater 307 is provided at the rear. The structure of the recycled material collection device is the same as that of the recycled material transfer device in the second heating machine, including a receiving bucket, an inclined feeding conveyor and a horizontal conveyor belt. The inclined feeding conveyor is arranged obliquely, and a scraper is arranged on it. plate, the receiving bucket is arranged at the bottom of the inclined feeding conveyor, the top of the inclined feeding conveyor is connected to one end of the horizontal conveyor belt, and the other end of the horizontal conveyor belt extends to the feeding port of the heating and mixing drum 303 3032. A regeneration agent spraying device 308 is installed on the top of the horizontal mixing tank 305, and a rotating blade 309 is arranged inside the horizontal mixing tank, and the mixed material of the horizontal mixing tank is transported to the cloth spreading device through the outlet of the horizontal mixing tank. Both sides of the horizontal mixing cylinder 305 are provided with hydraulic arms 3020 for controlling the vertical movement of the horizontal mixing cylinder 305 . The cloth spreading device comprises a cloth auger 3010 and a screed 3011. The powered walking device includes an engine 3012, wheels 3013 and the like.

As a further design of the utility model, the regenerative mixing paver is also provided with a heating plate 3014 and a heating fuel chamber 3015, and a smoke and dust conveying pipeline 3016 is arranged above the heating plate 3014, and the tail end of the smoke and dust conveying pipeline 3016 is provided with Fan 3017. The heating and mixing drum is also externally connected to a fan 3017, and through the fan 3017 is externally connected to a first hot air duct 3018 and a second hot air duct 3019, the first hot air duct 3018 is connected to the flame heater 307, and the second hot air duct 3019 is connected to the heating plate 3014.

The regenerative mixing paver 3 can move forward, backward and left and right. The front end of the regenerative mixing paver 3 is a hopper 302 for adding new asphalt mixture. Before the regeneration construction, the mix ratio of the original road surface needs to be designed to determine the degree of road surface damage. You can choose to add 0--30% fresh asphalt mixture. The freshly mixed asphalt mixture enters from the adding hopper 302 at the front end of the regenerative mixing paver and is sent to the heating mixing drum 303 via the conveyor belt. The rear part of the second row of wheels in the forward direction of the regenerative mixing paver is a recycled material collection device 304, the structure is shown in Figure 4, the recycled material collection device 304 is used to collect recycled materials into the heating and mixing drum 303, and the same as the adding hopper 302 Enter the fresh asphalt mix. The heating and mixing drum 303 has a length of 5-15 meters, a width of 3-5 meters, and an inclination angle of 1-6 degrees. It rotates and has a flame heater at the rear, which can heat the regenerated material entering the drum from the original 70-80 ℃ to 140-160 ℃, which can fully ensure the paving temperature of the recycled mixture and ensure the compactness of rolling . There is a heating plate 3014 in the middle and lower part of the regenerative mixing paver, which is used to insulate and heat the regenerated raked pavement, so as to ensure sufficient thermal connection between the regenerated layer and the raked top surface. The regenerated material mixed by the heated mixing drum 303 is transported to the vertically movable horizontal mixing tank 305 at the rear of the third row of tires of the regeneration mixing paver 3 through the outlet 3031 at the rear of the drum. A regenerant spraying device 308 is installed on the top of the tank 305. The metering of the regenerant spraying is determined according to the asphalt aging regeneration test determined in advance in the laboratory. The regenerant spraying device 308 is on the top of the horizontal mixing tank 305. After spraying, use the rotating blade 309 inside the horizontal mixing tank to mix the regeneration agent with the old asphalt mixture. After mixing, it is discharged from the rear outlet of the horizontal mixing tank, and the asphalt mixture is evenly distributed on the road surface through the distribution auger 3010, and the regenerated mixture is spread on the road surface through the screed 3011. After paving, the recycled materials are rolled and compacted, and the road surface is compacted by using a double-steel wheel, double-drive, double-vibration roller and a tire roller. In addition, the heating and mixing drum 303 recycles the hot air passing through the drum during the heating process, and utilizes the fan 3017 on the upper part of the drum to reuse the discharged hot air, wherein 50% of the hot air is recycled to the heater for reuse through the first hot air duct 3018 , the other 50% of the hot air is distributed to the heating plate 3014 in the middle and lower part of the regenerative mixing paver through the second hot air pipe 3019 to carry out the heat preservation work on the pavement after raking, so as to make full use of the hot air discharged from the upper part of the heating mixing drum.

The above-mentioned heating plates are all hot air distribution plates, and fuel oil is stored in the heating fuel chamber. As shown in Figures 8 and 9, the fuel oil hot air heating device includes a furnace 4, a burner 5 and a hot air distribution plate, an inner sleeve 6 is arranged inside the furnace 4, and the burner 5 is arranged at one end of the inner sleeve 6, The burner 5 is connected with the heating fuel chamber through an oil delivery pipe. One side of the furnace 4 is provided with a hot air conveying channel 7 communicating with the interior of the furnace, the hot air conveying channel 7 communicates with the hot air distribution plate, a blowing hole 8 is arranged on the hot air distribution plate, and a return air suction port is provided at one end of the hot air distribution plate 9. The return air suction port 9 communicates with the furnace 4 through the return air passage 10, and a fan 11 is arranged on the return air passage 10. An insulating material layer 12 is arranged on the outer side of the furnace 4 . The hot air distribution plate includes a telescopic tube 13 and a wind-extinguishing static plenum 14 , and the blowing holes 8 are uniformly arranged at the bottom of the telescopic tube 13 and the wind-stopping static plenum 14 .

The utility model utilizes three sets of devices including the first heating machine 1, the second heating machine 2 and the regenerative mixing paver 3, which fully changes the difficulties of low temperature and difficult quality assurance when the traditional regenerative machine paves recycled materials, and greatly improves Improve the quality of the pavement after regeneration, save energy at the same time, and enhance the competitiveness of independent innovation.

Parts not mentioned in the above methods can be realized by adopting or referring to existing technologies.

The above has only described the basic principle and preferred implementation of the utility model, it should be pointed out that for those skilled in the art, without departing from the structure of the utility model, some deformations and improvements can also be made, and these should also be considered It is the protection scope of the utility model.

Claims (8)

1. An on-site regeneration device for hot air heating of asphalt pavement fuel oil, characterized in that it includes a first heating machine, a second heating machine and a regeneration mixing paver, the first heating machine, a second heating machine and a regeneration mixing spreader The paver works continuously in sequence; the first heating machine is equipped with a fuel hot air heating device for heating the 1-2 cm thick asphalt pavement, and rakes the heated asphalt pavement to a depth of 1-2 cm. It is used as a raking device for the first layer of recycled materials; the second heating machine is equipped with a fuel hot air heating device for heating the asphalt pavement with a thickness of 2-6 cm on the road surface, and raking the heated asphalt pavement for 2-6 cm A raking device that is deep and concentrated as the second layer of recycled materials, and a recycled material transfer device that transfers the first layer of recycled materials collected by the first heating machine to the top of the second layer of recycled materials; the recycled mixing and paving The machine is equipped with a heating and mixing drum, together with a recycling material collection device that collects the first layer of recycled materials and the second layer of recycled materials into the heating and mixing drum, and a device that spreads the mixed material on the road surface. The cloth spreading device is equipped with a flame heater on the heating and mixing drum; the fuel hot air heating device includes a furnace, a burner and a hot air distribution plate, and an inner sleeve is arranged inside the furnace, and the burner is arranged on the inner sleeve At one end of the pipe, the burner is connected to the heating fuel chamber through the oil pipe. On one side of the furnace, there is a hot air delivery channel connected with the inside of the furnace. The hot air delivery channel is connected to the hot air distribution plate. One end of the distribution plate is provided with a return air suction port, and the return air suction port communicates with the furnace through a return air passage, and a fan is arranged on the return air passage. 2. An on-site regeneration device for fuel hot air heating on asphalt pavement according to claim 1, characterized in that: the regenerated material transfer device includes a receiving bucket, an inclined feeding conveyor and a horizontal conveyor belt, and the inclined feeding The conveyor is arranged obliquely, and a scraper is arranged on it. The receiving bucket is arranged at the bottom of the inclined feeding conveyor. The top of the inclined feeding conveyor is connected to one end of the horizontal conveyor belt, and the other end of the horizontal conveyor belt Extends to the outlet at the rear of the second heater. 3. A kind of on-site regeneration device for asphalt pavement fuel hot air heating according to claim 1, characterized in that: the regeneration mixing paver also includes an adding hopper and a horizontal mixing tank for new asphalt mixture, and the adding hopper The material is conveyed to the heating and mixing drum through the material conveyor belt, and the recycled material mixed by the heating and mixing drum is conveyed to the horizontal mixing tank through the outlet of the heating and mixing drum. 4. The on-site regeneration device for hot air heating of asphalt pavement fuel oil according to claim 1, characterized in that: the top of the horizontal mixing tank is equipped with a regeneration agent spraying device, and the inside of the horizontal mixing tank is provided with rotating blades, The material mixed by the horizontal mixing tank is transported to the cloth spreading device through the outlet of the horizontal mixing tank. 5. The on-site regeneration device for hot air heating of asphalt pavement fuel oil according to claim 1, characterized in that: the heating and mixing drum has a length of 5-15 meters and a width of 3-5 meters, and the heating and mixing drum Inclined arrangement, the inclination angle is 1-6 degrees. 6. The on-site regeneration device for fuel hot air heating on asphalt pavement according to claim 1, characterized in that: the recycled material collection device includes a receiving bucket, an inclined feeding conveyor and a horizontal conveyor belt, and the inclined feeding The conveyor is arranged obliquely, and a scraper is arranged on it. The receiving bucket is arranged at the bottom of the inclined feeding conveyor. The top of the inclined feeding conveyor is connected to one end of the horizontal conveyor belt, and the other end of the horizontal conveyor belt Extends to the feed opening of the heated mixing drum. 7. The on-site regeneration device for hot air heating of asphalt pavement fuel oil according to claim 1, characterized in that: an insulating material layer is arranged on the outside of the furnace. 8. The on-site regeneration device for hot air heating of asphalt pavement fuel oil according to claim 1, characterized in that: the hot air distribution plate includes a telescopic tube and a wind-out static pressure box, and the blowing hole is located between the telescopic tube and the wind-out The bottom of the plenum is evenly laid out.