KR20180137439A - Heater of asphalt paving apparatus for recycling asphalt surface layer in field - Google Patents

Abstract

In a recycling asphalt paving apparatus provided with a pre-heater and a recycler to recycle an asphalt surface layer in a filed, a pre-heater heating plate and a recycler heating plate to heat an asphalt surface layer individually become a unit with a heating element unit to be easily manufactured and maintained. Moreover, provided is a heating plate of an asphalt paving apparatus for recycling an asphalt surface layer in a filed, which can easily adjust a heating width of the heating plate of the asphalt paving apparatus for recycling an asphalt surface layer in a filed, and further, can uniformly heat asphalt paving by minimizing thermal deformation of a heating plate heating element as an infrared-based heating device that has high infrared efficiency and is relatively premium-priced.

Description

TECHNICAL FIELD [0001] The present invention relates to a hot-plate for a surface-layer regenerated asphalt pavement apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-site surface regenerated asphalt pavement apparatus, and more particularly, to a method and apparatus for heating a surface layer of asphalt in a regenerated asphalt pavement apparatus having a preheater and a recycler for regenerating a surface layer of asphalt A preheater heating plate, and a recycler heating plate.

Generally, asphalt (or asphalt concrete) is divided into new asphalt and regenerated asphalt, where regenerated asphalt is divided into plant regenerated asphalt and on-site surface regenerated asphalt.

These new asphalt are produced in the factory and then carried out, installed, and composted. Also, among the regenerated asphalt, factory recycled asphalt is applied through complicated processes such as cutting old aged asphalt in the field, transporting the plant, pulverizing the waste asphalt, sorting, producing recycled ascon, carrying on site, installing and compaction. Of these regenerated asphalt, on-site surface regenerated asphalt is applied after heating and cutting old aged asphalt pavement on site, then adding recycled additives, mixing and packaging.

For example, in-situ surface regenerated asphalt uses 70% or more of waste ascon and 30% or less of new ascon. In the case of such on-site surface regenerated asphalt, after the packed asphalt is cut in the field, The temperature is heated to 120 ° C. or higher, and then the recycled asbestos and recycled additives are fed and mixed, and the production, laying and compaction processes are carried out immediately.

As described above, the on-site surface regenerated asphalt is heated by being heated in the aged surface of the asphalt pavement, crushed in situ, recycled additive is added, mixed without additional heating, put into the asphalt pavement installation facility, , It is possible to omit various processes as compared with factory regenerated asphalt, and also to prevent air pollution caused by harmful substances generated in the transportation process by heating and mixing method, and to reduce cost and construction cost.

In particular, the asphalt is oxidized and loses its properties when heated to high temperature, and the aging asphalt aged by the high temperature heating shortens the lifespan of the packaging, shortening the period of the re-construction. Thus, when the aged asphalt is repeatedly re- The life span is shortened so that it is difficult to repeatedly recycle the waste, which eventually leads to waste treatment.

Also, in the case of on-site surface regenerated asphalt, the road surface is directly heated on the site using a heater. The surface layer of the asphalt is cut using a cutting machine attached to the heater, and the regeneration additive and the new asphalt mixture are mixed at a certain ratio It is a way to lay it on the site where it is.

However, in the case of on-site surface regenerated asphalt, the asphalt surface layer is heated to a temperature higher than 120 ° C to mix and lay with the asphalt mixture. In this case, if the average temperature of the crushed waste ascon is set to 120 ° C or more, A part of the surface layer of the asphalt is burnt and the amount of fuel consumed is also large. Particularly, the asphalt surface layer is oxidized or aged to affect the quality of the asphalt surface layer. In addition, And the construction speed is slowed down, thus increasing the overall construction cost.

On the other hand, in the case of the conventional surface layer recycling asphalt pavement method, the asphalt mixture produced from the asphalt plant was purchased, the old asphalt pavement was heated by the hot plate, and then the recycled asphalt pavement was mixed with the cut mixture. Accordingly, there is a problem in that it is difficult to construct the asphalt pavement when the asphalt plant is not nearby or the asphalt mixture can not be produced with the required quality.

In the case of such a surface layer recycling asphalt pavement method, there is only an asphalt surface layer heating device, and there is no heating mixer in the field. Therefore, when the surface layer of asphalt is heated, it is sufficiently heated to ensure a constant heating temperature. After cutting, the regeneration additive is mixed with the obtained temperature at the heating of the asphalt surface layer.

As a prior art for solving the above-mentioned problems, Korean Patent No. 10-1299459 discloses an invention entitled " direct and indirect heating type mixed mixer and a field-heated asphalt surface layer regeneration system using the same. 1b.

FIG. 1A is a schematic view of a conventional asphalt surface layer regenerating system using a thermally circulating asphalt road surface heating apparatus, and FIG. 1B is an external view of the thermally circulating asphalt surface heating apparatus shown in FIG.

As shown in FIGS. 1A and 1B, a conventional asphalt surface layer regenerating system using a thermally circulating asphalt road surface heating apparatus is a system in which hot air is used to heat the road surface to 30 to 80 ° C, A thermally circulating asphalt road surface heating apparatus 20 for removing smoke and moisture by internal hot wind and recycling the hot air by circulating the hot air; A road surface crusher 31 for cutting and crushing the heated road surface; And a mixer 32 for supplying the new aggregate having passed through the thermo-cyclic asphalt road surface heating apparatus 20 and the waste aggregate contained in the cut road surface, and heating and mixing the hot aggregate using hot air.

Here, the thermo-cyclic asphalt road surface heating apparatus 20 heats the aged asphalt surface layer 40 to 30-80 ° C. by using hot air, and if the hot air circulating inside the surface layer 40 is used, the aged asphalt surface layer 40 It is possible to prevent environmental pollution by burning and removing smoke and moisture generated during heating. As shown in FIG. 1B, the thermally circulating asphalt road surface heating apparatus 20 improves the energy efficiency by recycling the hot air heated by the aged asphalt surface layer 40 without circulating it to the outside, .

This thermally circulating asphalt road surface heating apparatus 20 is transported by the trailer 10. A cab 11 is provided on the trailer 10 and a generator 12, an oil tank 13 and a hydraulic system 14 are installed separately.

The trailer 10 has a main hopper 15 at one end thereof. The new aggregate fed into the main hopper 15 is conveyed to a new aggregate feed hopper by conveying means such as a conveyor belt, Heated by the indirect heat inside the heating device 20 or directly heated by the heat circulating asphalt road surface heating device 20 to the road surface.

1B, the thermally circulating asphalt road surface heating apparatus 20 includes a main housing 21, a hot air blower 22, and a recirculation pipe 23. As shown in FIG.

The thermally circulating asphalt road surface heating apparatus 20 is a device for heating the old surface layer 40 using hot air supplied into the main body 21. The main housing 21 is formed long in the longitudinal direction, And a hot air blower 22 is installed at the inner one end thereof.

The hot air blower 22 may include first and second hot air fans to be opposed to each other in the width direction at one end inside the main housing 21 and hot air flowing from the inner end of the main housing 21 to the other end And the other end of the main housing 21 and the other end of the main housing 21 are connected to each other through a recirculation pipe 23. [ That is, the hot air can circulate in the main housing 21 continuously without flowing out.

The thermally circulating asphalt road surface heating apparatus 20 of the conventional field-heated asphalt surface regeneration system has a function of heating the road surface to 30 to 80 ° C by using hot air, It is possible to incinerate and remove the smoke and moisture generated during heating.

However, in the case of a surface-heated asphalt surface regeneration system using a thermo-cyclic asphalt road surface heating apparatus according to the prior art, a separate road surface crusher 31 is required, and waste aggregate and new aggregate are loaded and transported to the mixer 32 A mixer 22 for supplying the new aggregate having passed through the thermo-cyclic asphalt road surface heating apparatus 20 and the waste aggregate contained in the cut road surface and heating and mixing the hot- There is a problem in that it is separately required.

Meanwhile, an asphalt mixture is usually prepared by charging asphalt, aggregate, mineral filler or the like into an asphalt mixing plant and then heating and mixing these materials .

The asphalt mixture is heated to a high temperature of 160 to 200 ° C and is cooled to room temperature during the laying and compaction of roads. The reason why the high temperature heating process is required for manufacturing the asphalt mixture is because the asphalt needs to be liquefied so that the asphalt acts as a binder of the aggregate.

That is, the asphalt mainly used for the road pavement is petroleum-based asphalt, which is made of solid black solid of the manufacturing process. Such petroleum-based asphalt is mainly used as straight asphalt, Also known as asphalt binder.

The asphalt is heated to liquefy, and the adhesive strength of the liquefied asphalt is used for bonding aggregates. The asphalt mixture used for road pavement is made of a hot-mix asphalt mixture (HMA).

Accordingly, a large amount of energy is required to heat the asphalt mixture to a high temperature in order to produce the asphalt mixture, and the amount of the harmful gas such as carbon dioxide (CO ² ) is increased during the construction of the asphalt mixture. In addition, the high temperature asphalt mixture installed and poured at the time of road pavement has a problem that the opening time of the traffic is delayed by the time required to cool down to room temperature, and the workers are exposed to the risk of safety accident.

In recent years, in order to solve the above-mentioned problems, there has been proposed a Warm-Mix Asphalt Mixture ('WMA') capable of lowering the temperature sensitivity of the asphalt and mixing and compaction at a lower temperature than the existing heated asphalt mixture Research is actively under way. In other words, studies have been actively carried out to reduce carbon dioxide emissions from asphalt mixture packing by lowering the mixing and compaction temperature of asphalt and aggregate.

The road pavement technology using such a medium temperature asphalt mixture (WMA) is prepared at a temperature of 110 to 150 ° C., which is 30 to 40 ° C. lower than the temperature required for manufacturing the asphalt mixture, in comparison with the conventional road pavement technique using the above- It is possible to suppress the generation of various harmful gases during the production and construction process of the asphalt mixture and to reduce the petroleum-based fuel which is the main cause of the greenhouse gas during the production of the asphalt mixture by about 30% .

On the other hand, as a prior art, the invention entitled " Asphalt pavement device for recycling asphalt on the site and its method ", filed by the applicant and inventor of the present invention and registered in Korean Registered Patent No. 10-1587111, Which will be described with reference to FIG.

FIG. 2 is a view showing a conventional asphalt pavement device for recycling a surface layer of asphalt according to the prior art, which is mounted on a mobile vehicle. The asphalt pavement device for recycling the surface layer of asphalt is mounted on a mobile vehicle, And simultaneously heating the aggregate and the surface layer of the asphalt with a heating plate.

2, an asphalt pavement device 50 for recycling a surface layer of asphalt according to the prior art includes an aggregate hopper 51, an aggregate siding device 52, an operation panel 53, a fuel injection tank 54 A heating plate 55, a cutting and collecting facility 56, a dust collecting facility 57, an asphalt tank 58, a regeneration additive tank 59, a mixing facility 60 and an installation facility 61.

The aggregate hopper 51 stores and supplies the new aggregate 81 that is installed at the rear end of the upper portion of the moving vehicle and supplied through the aggregate supply truck, (81) is laid on the asphalt surface layer (72) of the aged asphalt pavement (71).

The operation panel 53 is mounted on a movable vehicle to control the operation of each component of the asphalt pavement device 50 that recycles the surface asphalt surface layer,

The fuel injection tank 54 stores the fuel for heating the heating plate 55, and is mounted on the upper portion of the movable vehicle.

The heating plate 55 simultaneously heats the asphalt surface layer 72 and the laid new aggregate 81 to a predetermined temperature, for example, about 120 ° C. At this time, the asphalt surface layer 72 and the new aggregate 81 are simultaneously heated by the heating plate 55 on the old asphalt pavement 71. Accordingly, the new aggregate and the mixer for heating and mixing the waste aggregate contained in the cut road surface are not required, and maintenance of the old-age asphalt pavement 71 can be performed simply and economically.

The cutting and collecting facility 56 cuts, scrapes and collects the asphalt surface layer 72 and the new aggregate 81 simultaneously heated by the heating plate 55,

The dust collecting facility 57 is mounted on the upper part of the movable vehicle so as to collect the dust scattered by the cutting and collecting facility 56. For example, the cutting and collecting facility 56 cuts and collects the collected asphalt surface layer 72 and the new aggregate 81 to a depth of 2.5 to 10 cm.

The asphalt tank 58 stores the asphalt raw material,

The regeneration additive tank 59 stores a regeneration additive that is mixed with the asphalt raw material. For example, the regeneration additive may be formed of 60 to 90 wt% of a softener, 2 to 30 wt% of a modifier, 2 to 30 wt% of a pressure-sensitive adhesive, and 1 to 10 wt% of a carbon black as a coloring and microfiller, but is not limited thereto.

The mixing facility 60 mixes the asphalt raw material supplied from the asphalt tank 58 and the regeneration additive supplied from the regeneration additive tank 59 with the collected asphalt surface layer 72 and the new aggregate 81 to form an asphalt mixture do.

For example, in the mixing facility 60, the amount of the collected asphalt surface layer 72 and the new aggregate 81 is 70w% or more, the amount of the asphalt raw material and the regeneration additive is 30w% Asphalt mixtures can be formed. Also, the asphalt mixture 320 is formed by mixing 0 ~ 2w% of the asphalt raw material and 0.1 ~ 1w% of the amount of regeneration additive.

The laying facility 61 installs the asphalt mixture formed by the mixing facility 60 in the old-age asphalt pavement 71.

Here, the aggregate hopper 51, the asphalt tank 58 and the regenerant additive tank 59 are mounted on the upper portion of the movable vehicle,

The aggregate submersible machine 52, the heating plate 55, the cutting and collecting facility 56, the mixing facility 60 and the installation facility 61 may be mounted under the movable vehicle but are not limited thereto.

The asphalt pavement device 50 for recycling the surface layer of the asphalt in the conventional technology is mounted on a movable vehicle and the aggregate hopper 51, the operation panel 53, the fuel injection tank 54, The equipment 57, the asphalt tank 58 and the regenerant additive tank 59 are mounted on the upper part of the vehicle and are provided with the aggregate sludge 52, the heating plate 55, the cutting and collecting facility 56, And the laying equipment 61 may be mounted on the lower portion of the vehicle.

According to the asphalt pavement apparatus 50 for recycling the surface layer of asphalt according to the prior art, the asphalt pavement produced in the asphalt plant is not used as the on-site surface layer regenerated asphalt pavement apparatus,

The asphalt surface layer and the new aggregate can be heated and mixed by using a heating plate used for heating the asphalt surface layer of the old aged asphalt pavement without using the separate heating device for heating the new aggregate by using the aggregate and the asphalt raw material mounted on the vehicle , And an old aggregate hopper capable of supplying new aggregate and an aggregate eruption device capable of installing new aggregate can be easily installed in a mobile vehicle to repair the old aged asphalt pavement.

As described above, in the case of the asphalt pavement apparatus 50 for recycling the asphalt surface layer on the site according to the related art, the road surface is heated directly on the site by using the hot plate 55. On the front surface of the hot plate 55 The surface layer of the asphalt is cut using the disposed cutting and collecting equipment 56, and then the regenerating additive and the new asphalt mixture are mixed at a certain ratio, and then installed in the cut part as it is.

On the other hand, as a heating element used in a pre-heater according to the related art, for example, a heating element manufactured by a far-infrared method using a gas burner is disclosed. However, the matters related to the pressure, the height, the smoke flame generation, and the temperature efficiency of the supplied LPG gas have not been specifically disclosed in such a heating element. Therefore, it is necessary to develop a heating element for a heating plate suitable for an asphalt paving device for recycling the surface layer of the asphalt in the field.

Korean Patent No. 10-1587111 filed on May 4, 2015 entitled "Asphalt pavement device for recycling asphalt surface layer on site and method thereof" Korean Patent No. 10-1299459 filed on October 23, 2012 entitled "Direct and indirect heating type mixing mixer and on-site heated asphalt surface layer regeneration system" Korean Patent No. 10-828543 filed on Jan. 23, 2007 entitled "METHOD FOR CONTINUOUSLY REPRODUCING PACKING ASPHALT COMPOUND LAYERS ON SITES AND FREQUENTLY VEHICLE SYSTEM FOR THE SAME" U.S. Patent No. 4,711,600 filed on Jan. 8, 1985 entitled "Heating Device Using Asphalt Pavement Phishing Apparatus" U.S. Patent No. 6,472,292 (filed on February 19, 1993 entitled "Asphalt Surface Recycling Method and Apparatus")

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and an object of the present invention is to provide a reclaimed asphalt pavement apparatus having a preheater and a recycler for regenerating the asphalt surface layer in the field, The present invention provides a heating plate for a surface layer regenerated asphalt pavement apparatus which is easy to manufacture and maintain by unitizing a heater heating plate and a recycler heating plate into heating unit units.

Another object of the present invention is to provide an infrared-based heating apparatus having a high infrared efficiency and relatively high-priced as an infrared-based heating apparatus, which can minimize the thermal deformation of a heating element for a heating plate to uniformly heat the asphalt package, To provide a hot plate of an asphalt pavement device.

As a means for achieving the above-mentioned technical object, a heating plate of a surface-layer regenerated asphalt paver

Preheater equipment for primary heating of asphalt surface which recycles asphalt asphalt pavement quickly on site, recycled on site, and surface reclamation including recycler equipment for secondary heating of first heated asphalt pavement and cutting, mixing and laying 1. A asphalt pavement apparatus comprising: a preheater heating plate divided into a front heating plate, a central heating plate and a rear heating plate, the preheating heating plate installed in the preheater and heating the asphalt surface layer first; And a recycler heating plate installed at a lower portion of the recycler equipment for secondarily heating the first heated asphalt surface layer, wherein each of the preheater heating plate and the recycler heating plate includes infrared rays Wherein the preheater device heats the asphalt from a room temperature to an average heating temperature and the individual heating element is formed of a metal fiber, And the recycler equipment further supplies heat to raise the average heating temperature of the asphalt so that the asphalt can be cut, and the preheater heating plate has a heating plate elevating and lowering facility To a predetermined height on the road surface But to allow spar for copper, preheater front heating plate which is installed at a front lower portion of the preheater apparatus; A preheater central heating plate installed at a central lower portion of the preheater equipment; And a preheater rear heating plate installed at a rear lower portion of the preheater,

In order to facilitate the arrangement of the preheater heating plate and the recycler heating plate and to reduce the cross sectional area of the heating body to increase the amount of heat per unit area, the unitized heating element unit mixes a combustible mixture of LPG gas and air injected from the gas nozzle assembly A venturi mixer; And two separate heating elements connected in common to the venturi mixer to heat the asphalt package and fixed to a frame made up of an inner case and an outer case, wherein each of the individual heating elements can uniformly heat the asphalt package Based infrared heating device.

Also preferably,

The individual heating elements forming the heating element unit include a flange for burner fastening that is bent to fix the individual heating elements to the frame made up of the inner case and the outer case; A gas nozzle assembly for injecting LPG gas and air supplied from the fuel injection tank into the venturi mixer; A venturi mixer connected to the gas nozzle assembly and serving as a mixer for mixing and supplying a combustible mixture of LPG gas and air injected from the gas nozzle assembly; A baffle for dividing and supplying a combustible mixture of LPG gas and air ejected from the venturi mixer at an appropriate ratio; And a combustible mixture supplied through the baffle to ignite to generate a flame.

Also preferably,

The individual heating element forming the heating element unit is disposed on a side surface of the spark plug and detects a flame to be burned by using the electrical property of the flame; A heating surface formed on the flange for burner fastening and formed of metal fiber to generate heat by the flame ignited by the spark plug and perform radiative heat transfer in an infrared system; A distribution plate disposed below the heating surface to uniformly heat the heating surface; And a reinforcing bar installed at a lower portion of the distribution plate at predetermined intervals to support the reinforcing plate.

According to the present invention, a preheater heating plate and a recycler heating plate for heating an asphalt surface layer in a regenerated asphalt paver equipped with a preheater and a recycler for regenerating the asphalt surface layer in the field are respectively connected to a heating element unit The unitization makes it easy to manufacture and maintain.

According to the present invention, the heating width of the heating plate of the on-site surface regenerated asphalt pavement apparatus can be easily controlled.

According to the present invention, it is possible to uniformly heat the asphalt pavement by minimizing the thermal deformation of the heating element for the heating plate as a relatively pre-infra-red Infrared based heating apparatus having a high infrared ray efficiency.

According to the present invention, 100% of the recycled aggregate produced in the old asphalt pavement can be recycled environmentally by continuous application in the field.

1A is a schematic view of a conventional asphalt surface layer regenerating system using a thermally circulating asphalt road surface heating apparatus, and FIG. 1B is an external view of the thermally circulating asphalt surface heating apparatus shown in FIG. 1A .
2 is a view showing a conventional asphalt pavement device for recycling a surface layer of asphalt according to the prior art in a portable vehicle.
FIG. 3 is a schematic view illustrating a preheater and a recycler of a site-surface regenerated asphalt paver according to an embodiment of the present invention.
FIG. 4 is a view illustrating a specific implementation of the preheater and recycler of the on-site surface regenerated asphalt paving device shown in FIG.
5 is a view for explaining the required characteristics of the hot plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention.
6 is a view showing an asphalt heat transfer mechanism by a heating element for designing a heating plate of a site-surface regenerated asphalt pavement apparatus according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating calculation of a fuel supply amount when a heating plate of a site-surface-regenerated asphalt pavement apparatus according to an embodiment of the present invention is a preheater.
FIG. 8 is a view illustrating calculation of the fuel supply amount in the case where the heating plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention is a recycler.
FIG. 9 is a top view and a rear view of a preheater heating plate and a recycler heating plate of a site surface regenerated asphalt pavement apparatus according to an embodiment of the present invention.
10 is a view showing a heating plate and an inner case of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, respectively.
11 is a top and bottom perspective view illustrating a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention.
12 is a plan view, a front view, and a side view illustrating a heating element unit in a heating element for a heating plate of a field surface regenerated asphalt paver in accordance with an embodiment of the present invention.
13 is a top and bottom perspective view illustrating a specific heating element for forming a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention.
FIG. 14 is a plan view, a front view, and a side view specifically illustrating an individual heating element for forming a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention.
15 is an exploded perspective view of an individual heating element forming a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention.
16 is a view illustrating that a heating element unit is connected to a gas head in a heating element for a heating plate in a field surface regenerated asphalt paver according to an embodiment of the present invention.
17 is a view illustrating a heating element combustion control system for generating a heating element for a heating plate of a field surface regenerated asphalt paver according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

In the case of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, a road pavement technique using a mesophase asphalt mixture (WMA) for producing an asphalt mixture at a temperature of about 110 to 150 ° C using a heating plate 3 to 17, the heating plate and its heating unit of the on-site surface layer regeneration asphalt pouring apparatus according to the embodiment of the present invention will be described in detail.

[Hot Plates of On-Site Surface Layer Reclaimed Asphalt Pavement (300)]

FIG. 3 is a schematic view illustrating a preheater and a recycler of the on-site surface regenerated asphalt paving apparatus according to the embodiment of the present invention, FIG. 4 is a view showing a preheater and a recycle of the on- Fig. 8 is a diagram illustrating a specific implementation of the present invention.

Referring to FIGS. 3 and 4, the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention includes a preheater device 100 for heating the asphalt pavement so that the asphalt pavement can be quickly heated and recycled on site ), And a recycler apparatus 200 for secondary heating, cutting, mixing, and laying.

3, the preheater apparatus 100 includes an engine / operation panel 110, a fuel injection tank 120, a dust collector 130, a self-propelled frame 140, a heating plate 310, The heating plate may be divided into a front heating plate 310, a central heating plate 320 and a rear heating plate 330. The fuel injection tank 120 may be an LPG tank.

3, the recycler apparatus 200 includes an engine / operation panel 210, a fuel injection tank 220, a dust collection facility 230, a regeneration additive tank 240, 250, a mixing facility 260, a cutting facility 270, a heating plate 340, a self-propelled frame 280, and other equipment.

4A, the self-propelled frame 140 includes heating plates 310, 320 and 330, a fuel injection tank 120, a dust collecting facility 130, ), Hydraulic equipment, generators, etc., can bear all the weight, can run on the road, and has durability so that there is no problem in packing work or movement.

In addition, the self-propelled frame 140 is designed to be able to move and steer by its own power or to be movable to a tractor. As the specification of the self-supporting frame 140, for example, a width of about 3 m, a length of about 11 m (distance between axes of 7.5 m or more), a moving speed of 0 to 15 km / h or more, a work of 0 to 7 m / Speed and a power of about 250 HP.

The fuel injection tank 120 is an LPG tank made of LPG and stores fuel for heating the heating plates 310, 320 and 330. The fuel injection tank 120 is mounted on the self-supporting frame 140 of the movable type vehicle, The fuel supply tank 120 may be a tank for supplying necessary gas to the fuel tank 120. For example, it may vary according to the design of the heating plates 310, 320 and 330, . In addition, the fuel injection tank 120 is preferably a safety-related facility during operation, and it is preferable that the fuel injection tank 120 is provided with safety equipment such as ignition detection.

In addition, the fuel injection tank 120 uses an approved product of Korea Gas Safety Corporation to secure safety, and the fuel injection tank 120 constitutes an anti-backfire PID. Further, the fuel injection tank 120 includes an evaporator and a vibration And may include a shock-absorbing mounting structure. As a fuel filling method for the fuel injection tank 120, it is preferable to mount a fitting that can be supplied directly from an LPG gas tank in the field.

The dust collecting facility 130 collects all the vapor generated by the heating plates 310, 320, and 330 and finally discharges the collected vapor after collecting or removing the collected vapor from a hood facility (not shown). If no vapor or odor is generated during heating by the heating plates 310, 320 and 330, the dust collecting unit 130 and the hood unit may be omitted.

The engine / operation panel 110 is mounted on the self-propelled frame 140 to control the operation of components of each of the preheater devices 100 of the asphalt pavement device for recycling the surface asphalt layer according to the embodiment of the present invention do. Specifically, the engine / operation panel 110 controls the steering, forward / backward, traveling speed, LPG ignition start / stop, heating plate temperature (LPG discharge amount, And a dashboard capable of adjusting the left / right variable width. In this case, the instrument panel of the engine / operation panel 110 is, for example, a touch type monitor, for example, a driving speed m / min, a mileage m, a fuel gauge, an LPG gauge, , The LPG discharge amount, the air flow rate, the heating plate vertical state, the heating plate width, the preheating temperature, the post-heating temperature, the atmospheric temperature and other gauge conditions.

The heating plates 310, 320, and 330 heat the asphalt surface layer to a predetermined temperature, for example, about 120 ° C. At this time, the asphalt surface layer is heated by the heating plates 310, 320, and 330 on the old asphalt pavement.

In the operation of the preheater device 100, the engine / operation panel 110 displays the date, time, GPS position, driving speed (m / min), travel distance (m) It is desirable to store the data of heating end point, ambient temperature, and LPG usage per minute, accumulate a minimum of 300 hours of data, and also be able to back up via USB. At this time, the amount of LPG used can be inversely calculated by actual measurement or flow rate.

Other facilities of the preheater apparatus 100 may include a heating plate elevating apparatus, a generator, and a sensor apparatus. For example, the heating plate elevating and lowering apparatus can raise or lower the heating plates 310, 320, and 330 to a predetermined height on the road surface or move the same without any problems, 110, and the dust collecting facility 130. As the sensor equipment, a GPS, an infrared thermometer, and the like can be provided.

The preheater apparatus 100 may include a heating plate adjusting unit for attaching the heating plates 310, 320 and 330 to the self-supporting frame 140 and adjusting the heating plates 310, 320 and 330, In addition, when the heating plates 310, 320, and 330 are attached to the front or back of the preheater device 100, the tilting device may include a tilting device that adjusts tilting right and left according to the radius of curvature.

4B, the self-propelled frame 280 includes a heating plate 340, a fuel injection tank 220, a dust collecting unit 230, a hydraulic equipment, Generator, and the like, can bear all the weight, can run on the road, and has durability so that there is no problem in the packaging operation or movement.

In addition, the self-propelled frame 280 is designed to be able to move and steer by its own power or to be movable to a tractor. As the specification of the self-supporting frame 140, for example, a width of about 3 m, a length of about 11 m (distance between axes of 7.5 m or more), a moving speed of 0 to 15 km / h or more, a work of 0 to 7 m / Speed and a power of about 250 HP.

The fuel injection tank 220 is an LPG tank made of LPG and stores fuel for heating the heating plate 340. The fuel injection tank 220 is mounted on the self-propelled frame 280 of the movable type vehicle, The tank capacity of the fuel injection tank 220 may vary depending on the design of the heating plate 340, for example, but is preferably about 1.5 tons. In addition, the fuel injection tank 220 is preferably a safety-related facility during operation, and it is preferable that the fuel injection tank 220 is provided with safety equipment such as ignition detection.

In addition, the fuel injection tank 220 uses an approved product of the Korea Gas Safety Corporation to secure the safety, and the fuel injection tank 220 constitutes an anti-backfire PID. Further, the fuel injection tank 220 includes an evaporator, And may include a shock-absorbing mounting structure. As a fuel filling method for the fuel injection tank 220, it is preferable to mount a fitting that can be supplied directly from the LPG gas tank in the field.

The dust collecting facility 230 is mounted on the self-contained frame 280 to collect the dust scattered by the cutting facility 270 and collect all the vapor generated in the heating plate 340. For example, the dust collecting facility 230 collects or discharges the collected vapor from the hood facility (not shown) after finally collecting or removing the vapor. If the heating plate 340 does not generate a vapor or odor during heating, the dust collecting unit 230 and the hood unit may be omitted.

The regeneration additive tank 240 is a tank for supplying a regeneration additive to be mixed with the asphalt raw material, and is made of a material which is prevented from corrosion, and the specification is preferably a tank capacity of 0.5 t. The regenerant additive tank 240 may include a heating system for heating the regenerant additive and a stirrer. The regenerant additive tank 240 should be able to confirm the amount of the regenerant additive stored therein. For example, 200 to 300 L Can be injected into the regeneration additive tank 240 by pumping regeneration additives in the drum. In addition, the regeneration additive may be formed of 60 to 90 wt% of a softening agent, 2 to 30 wt% of a modifier, 2 to 30 wt% of a pressure-sensitive adhesive, and 1 to 10 wt% of a carbon black as a coloring and microfiller, but is not limited thereto.

The cutting facility 270 cuts the asphalt road pavement, for example, at least 2.5 to 10 cm deep. That is, the cutting equipment 270 cuts the asphalt surface layer heated by the heating plate 340, and scrapes and collects the surface layer. For example, the cutting facility 270 cuts and collects the collected asphalt surface layer to a depth of 2.5 to 10 cm. In addition, the cutting apparatus 270 can move up and down to move and cut the recycler 200. At this time, the cutting depth of the cutting equipment 270 should be known, and the aggregate should be hardly damaged.

The mixing facility 260 thoroughly mixes the recycled aggregate that has been cut with the regenerating additive injected in a predetermined amount. For example, the mixing facility 260 first mixes the recycled aggregate and the regeneration additive, and then collects the asphalt mixture in the center and secondary mixes. Specifically, the mixing facility 260 mixes the asphalt raw material supplied from the asphalt tank and the regeneration additive supplied from the regeneration additive tank 240 with the collected asphalt surface layer to form an asphalt mixture. For example, the mixing facility 260 can mix the amount of the asphalt surface layer and the recycled aggregate of 70w% or more and the amount of the asphalt raw material and the regenerating additive to 30w% or less to form the asphalt mixture have.

The installation facility 250 may install the asphalt mixture formed by the mixing facility 260 in the old aged asphalt pavement and install a module capable of adjusting the automatic level and the installation width at the time of installing the asphalt mixture. For example, the above-mentioned installation width can be adjusted to 3 to 4 m.

The heating plate 340 heats the surface layer of the asphalt to a predetermined temperature, for example, about 120 ° C. At this time, the asphalt surface layer is heated by the heating plate 340 on the old asphalt pavement.

The engine / operation panel 210 is mounted on the self-propelled frame 280 to control the operation of components of each of the recycler apparatuses 200 of the asphalt pavement apparatus for recycling the on-site asphalt surface layer according to the embodiment of the present invention do. Specifically, the engine / operation panel 210 controls the steering, forward / backward, traveling speed, LPG ignition start / stop, LPG discharge amount, exhaust amount, heating plate lift, heating plate right and left variable width, An instrument panel capable of adjusting the vertical movement of the equipment, the cutting depth, the amount of the regenerant additive injected, and the temperature of the regenerant additive. In this case, the instrument panel of the engine / operation panel 210 may be a touch monitor, for example, a traveling speed (m / min), a traveling distance (m), a fuel gauge, an LPG gauge, The LPG discharge amount, the air flow rate, the heating plate width, the heating plate width, the temperature before heating, the temperature after heating, the vertical position of cutting equipment, the depth of cutting, the recycle additive storage level, the recycle additive temperature,

In operation of the recycler 200, the engine / operation panel 210 displays the date, time, GPS position, travel speed (m / min), travel distance (m) It is preferable that the data of heating end point, cutting depth, regeneration additive temperature, temperature after regeneration additive mixture, temperature of laying, LPG usage, regeneration additive use amount data are stored per minute, and that they can be backed up by USB. At this time, the amount of the LPG used and the amount of the recycled additive used can be inversely calculated by the measured amount or the flow rate.

The recycler apparatus 200 may further include an asphalt tank for storing the asphalt raw material, and may further include a new aggregate heating and mixing facility, a hot plate elevating facility, a generator, and a sensor facility. For example, the asphalt tank and the new aggregate heating and mixing facility may include a facility for temporarily storing, heating and mixing a certain proportion of asphalt and new aggregate in use. Further, the heating plate elevating and lowering apparatus can raise or lower the heating plate 340 to a predetermined height on the road surface or move it without any problem of movement, and the generator can be raised and lowered by the heating plate elevating and lowering equipment, And supplies power to facilities and the like. In addition, the sensor facility may include a GPS, an infrared thermometer, and the like.

The recycler apparatus 200 may include a heating plate adjusting unit for attaching the heating plate 340 to the self-supporting frame 280 and adjusting the heating plate 340, The tilting device may include a tilting device capable of adjusting the tilting to the left or to the right according to the radius of curvature when the device 200 is attached to the front or back of the device. Also, the recycler 200 may include a hood or the like that protects the cutting equipment 270 and the mixing equipment 260 from being influenced by the outside air before being installed.

According to the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, 100% of the recycled aggregate produced in the old asphalt pavement can be recycled eco-friendly by continuous construction in the field.

FIG. 5 is a view for explaining the required characteristics of the hot plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, and FIG. 6 is a cross- Fig. 3 is a view showing an asphalt heat transfer mechanism by a heating element for a heat exchanger.

The surface layer regenerated asphalt pavement apparatus according to the embodiment of the present invention comprises the preheater apparatus 100 and the recycler apparatus 200 as described above and the preheater heating plates 310 and 320 , And a recycler heating plate (340).

5, in the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, the preheater heating plates 310, 320 and 330 have a length of 10 m, a variable width of 3 to 4 m, min feed rate. It is also preferable to heat for 5 minutes at a middle temperature of 120 to 130 占 폚 based on the heating depth of 50 mm.

Further, the recycler heating plate 340 has a length of 4 m, a variable width of 3 to 4 m, and a feed rate of 2 m / min. Further, it is preferable to heat for 2 minutes at a middle temperature with an average heating temperature of 120 to 130 占 폚 based on a heating depth of 50 mm.

Therefore, the length of the preheater heating plates 310, 320 and 330 is 10 m and the length of the recycler heating plate 340 is 4 m, among the total heating plates of the on-site surface regenerated asphalt pouring apparatus according to the embodiment of the present invention The asphalt is heated to a total length of 14m and the designable feed rate is 2m / min, so the total heatable time can be calculated as 7min.

The preheater heating plates 310, 320, and 330 heat the asphalt from the room temperature (15 ° C) to about 100 ° C on average for 5 minutes, and the recycler heating plate 340 ) Is supplied with additional heat for 2 minutes to raise the asphalt to an average of 130 ° C to make the asphalt ready for cutting.

As an embodiment of the present invention, preheater heating plates 310, 320 and 330 and a recycler heating plate 340 for heating the package are provided from equipments capable of quickly heating and recycling the old asphalt pavement in the field, The heating plates 310, 320, 330, and 340 are gas-type heating devices. For example, conduction heat transfer in asphalt heated by radiation heat transfer of a heating element, which is a burner, Asphalt is a form of heating up. At this time, convection heat transfer of 400 to 800 ° C due to a part of the exhaust gas is considered, so that the overall efficiency is enhanced. As shown in FIG. 6, such a heat transfer mechanism is shown.

6, in the heating plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, the total heat transfer efficiency Can be about 50%.

7 is a view illustrating calculation of a fuel supply amount when the heating plate of the on-site surface layer regeneration asphalt pavement apparatus according to the embodiment of the present invention is a preheater, and FIG. 8 is a view And calculating a fuel supply amount when the heating plate of the asphalt paver is a recycler.

, ㎉)을 계산하며, 아스팔트에 함유되어 있는 수분을 가열하는 열량(

, ㎉)을 더하여 수학식 1과 같은 총열량(

, ㎉)을 산정한다. 그리고 버너가 공급해야 하는 열량(

, ㎉)은 가열효율 또는 열전달 효율(

)을 고려하여 수학식 1과 같이 계산할 수 있다.7, in order to calculate the required heat amount of the preheater, the depth 50 mm is heated to a target temperature on the order of about 100 ° C on an average, and the asphalt volume for calorimetric calculation is determined by the horizontal / The average heating depth can be used. At this time, the total mass is calculated in consideration of the density of the asphalt, and the amount of heat required to heat the target temperature to the target temperature using the specific heat and the temperature difference

, ㎉), and calculates the heat amount of heating the water contained in the asphalt (

, ㎉) are added to the total calories (

, ㎉) is calculated. And the amount of heat the burner must supply

, ㎉) is the heating efficiency or heat transfer efficiency

) Can be calculated as shown in Equation (1).

,

,

,

,

,

및

는 도 7의 a)에 도시된 바와 같다. 이때,

는 아스팔트에 함유된 일부의 수분을 100℃ 수증기로 가열하는 것으로 가정하였다. 이를 통해 계산된 열량(

)은, 도 7의 b)에 도시된 바와 같이, 112,392㎉이며,

는 60,029㎉로 총열량(

)은 172,421㎉로 계산할 수 있다. 한편, 가열효율을 고려하여 얻어진

는 344,842㎉이며, 아스팔트를 5분동안에 가열해야 하므로 시간을 고려한 버너열량은 약 414만㎉/hr가 된다. 이때, 프리히터의 면적을 고려하면, 대략 120㎾/㎡ 정도의 단위면적당 열량을 확보할 수 있다.here,

,

,

,

,

,

And

Is as shown in Fig. 7 (a). At this time,

Is assumed to heat some of the water contained in the asphalt to 100 ° C water vapor. The calculated calories (

) Is 112,392 k, as shown in Fig. 7 (b)

Was 60,029 kPa, and the total calories (

) Can be calculated as 172,421㎉. On the other hand,

Is 344,842 kPa, and since the asphalt should be heated for 5 minutes, the burner calorie considering time is about 4,140,000 kPa / hr. At this time, considering the area of the preheater, the amount of heat per unit area of about 120 kW / m 2 can be secured.

7B, the LPG tank capacity of the preheater can be calculated as (burner calorie / LPG calorific value x work time), where the calorific value of the burner is 4,400,000 rpm / hr, LPG The calorific value was about 12,000 cfu / kg and the working time per day was assumed to be about 10 hours. Therefore, the calculated capacity of the LPG tank is about 3.5 tons (actual LPG filling weight), and it is desirable that it is designed and manufactured appropriately for the design vehicle.

, ㎉)을 계산하고, 프리히터와 동일한 단위면적당 열량을 확보하기 위한 추가 보정열량(

, ㎉)을 더하여 수학식 2와 같이 총열량(

, ㎉)을 산정한다. 그리고 버너가 공급해야 하는 열량(

, ㎉)은 가열효율(

)을 고려하여 수학식 2와 같이 계산할 수 있다.Next, referring to Fig. 8, in order to calculate the heat quantity required for the recycler, it is aimed to heat the asphalt heated by the preheater to about 130 캜 on the average by further heating the asphalt. Calculate the required calorie in the same way as the preheater. Calculate the total mass in consideration of density and calculate the calories required to heat to the target temperature using the specific heat and the temperature difference (

, And the additional calorific value for securing the same amount of heat per unit area as the preheater (

, ㎉) is added and the total calories (

, ㎉) is calculated. And the amount of heat the burner must supply

, ㎉) is the heating efficiency

) Can be calculated as Equation (2).

,

,

,

는 도 8의 a)에 도시된 바와 같다. 이를 통해 계산된 열량은

는, 도 8의 b)에 도시된 바와 같이, 15,867㎉이며,

는 11,633㎉로 총열량

은 27,500㎉로 계산할 수 있다. 한편, 가열효율을 고려하여 얻어진

는 55,000㎉이며 아스팔트를 2분동안에 가열해야 하므로 시간을 고려한 버너열량은 약 165만㎉/hr가 된다.here,

,

,

,

Is as shown in Fig. 8 (a). The calculated calories

Is 15,867 kPa, as shown in Fig. 8 (b)

Of the total calories

Can be calculated as 27,500 cc. On the other hand,

Is 55,000 kPa and the asphalt should be heated for 2 minutes, so the burner calorie considering time is about 1,600,000 kPa / hr.

At this time, when considering the area of the recycler, the amount of heat per unit area of about 120 kW / m 2 can be ensured, so that the same amount of heat per unit area as the preheater can be secured. Accordingly, the capacity of the LPG tank of the recycler can be calculated as (burner calorie / LPG calorific value x work time). Here, the calorific value of the burner is 165,000 ㎉ / hr, the calorific value of LPG is about 12,000 ㎉ / kg, and the working time per day is assumed to be about 10 hours. Accordingly, the calculated capacity of the LPG tank is about 1.5 tons (actual LPG filling weight).

FIG. 9 is a top view and a rear view of a preheater heating plate and a recycler heating plate of a field surface regenerated asphalt pavement apparatus according to an embodiment of the present invention, And a heating plate and an inner case of the surface-regenerated asphalt paver.

9, in the case of the preheater device 100, the length of the heating plates 310, 320, and 330 is 10 m, and the length of the recycler equipment 200, The length of the heating plate 340 is 4 m. Therefore, the heating plate heats the asphalt with a total length of 14 m. At this time, since the designed feeding speed is 2 m / min, the total heating time is calculated as 7 minutes. At this time, a total of 224 (N _total ) individual heating elements of the heating plates 310, 320, 330, and 340 may be used.

If it is assumed that the amount of heat supplied per area is uniform, the preheater apparatus 100 heats the asphalt for 5 minutes from an ambient temperature to an average temperature of about 100 DEG C, and the recycler apparatus 200 adds additional heat for 2 minutes And the asphalt is raised to an average temperature of about 130 ° C., thereby making the asphalt into a state ready for cutting.

As described above, the preheater heating plates 310, 320 and 330 of the on-site surface layer regeneration asphalt pouring apparatus according to the embodiment of the present invention include a preheater front heating plate 310, a preheater central heating plate 320, The preheater central heating plate 320 and the preheater rear heating plate 330 may be formed as one unit as shown in FIG.

(L) x 4 m (W) + 3 m (L) of the preheater heating plates 310, 320, and 330. The preheater heating plates 310, (W) = 10 m (L) x 4 m (W), and the recycler heating plate 340 is a heating device of 4 m (L) x 4 m (W) 330 and 340 have a heating depth of 50 mm and the preheater heating plates 310, 320 and 330 are heated to an average temperature of about 100 ° C. and the recycler heating plate 340 has a heating temperature of about 130 ° C. Lt; / RTI > In addition, the heating plates 310, 320, 330 and 340 are fed at a feeding speed (working speed) of 2 m / min. At this time, the width of the preheater heating plates 310, 320, and 330 can be adjusted by forming a variable folding type or a removable type (which is separately manufactured and disassembled) capable of folding about 500 mm on both sides .

The heating plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention can heat the asphalt pavement uniformly at regular intervals as a relatively high-infrared-based infrared heating apparatus having high infrared ray efficiency.

10, among the preheater heating plates 310, 320 and 330 and the recycler heating plate 340 of the on-site surface layer regeneration asphalt pouring apparatus according to the embodiment of the present invention, for example, preheater heating plates 310 and 320 And 330 may be manufactured to have a size of 4 m x 4 m. That is, the heating plates 310, 320, 330, and 340 of the on-site surface regenerated asphalt pouring apparatus according to the embodiment of the present invention are arranged such that the heating unit unit 350 Each of the heating elements 350 has two individual heating elements 350. Each of the heating elements 350 has a size of 90 mm x 150 mm. , The amount of heat per unit area (m 2) of two sets of the heating element units 350 is 220 kW / m 2.

The heating plates 310, 320, 330, and 340 of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention are respectively provided with an inner case 360 and an outer case Lt; / RTI > That is, it is preferable that the heating plates 310, 320, 330, and 340 are mounted between the inner case 360 and the outer case to facilitate the arrangement.

In addition, the heating plates 310, 320, 330 and 340 of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention include a venturi mixer, which is a dedicated gas mixer for weight reduction and simplification. do.

[Heating element unit for heating plate of on-site surface regenerated asphalt paver (350)]

11 is a top and bottom perspective view illustrating a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver in accordance with an embodiment of the present invention. A front view, and a side view illustrating a heating element unit in a heating element for a heating element;

11 and 12, the heating element unit 350U in the heating element for heating plate of the on-site surface layer regeneration asphalt pouring apparatus according to the embodiment of the present invention may include two separate heating elements and a venturi mixer as a mixer. Here, as a result of calculation using the above-described design conditions shown in FIGS. 7 and 8, the calorie per unit area of the preheater and the recycler was found to be about 120 kW / m 2, and the basic data .

Specifically, as shown in FIGS. 11A and 11B, in the heating plate for the heating plate of the on-site surface layer regenerated asphalt paver according to the embodiment of the present invention, the material of the individual heating element in the heating unit 350U is a metal This metal fiber heating element is also referred to as a surface soft burner and has high radiation heat transfer efficiency per unit area and high radiation heat transfer efficiency.

Particularly, in the case of heating the asphalt, when the high-temperature burner flame directly touches the asphalt, the asphalt is oxidized, smoke is generated due to evaporation of the volatile matter, and there are cases where it is difficult to recycle due to the change of the property value and durability , It is desirable to configure a burner as a heat generating body capable of radiating heat by eliminating exhaust gas as much as possible. At this time, since the radiation energy becomes higher as the temperature of the heating element becomes higher, a metal fiber heating element which maximizes the radiant energy by heating the surface of the heating element to about 800 to 900 DEG C with an infrared wavelength of 2.9 mu m is suitable, The surface is characterized by excellent durability because of the metal.

In addition, since such a metal fiber heating element has a very large heating area, it is advantageous to install a large number of heating unit units 350U in the form of a unit module to manufacture, maintain and repair the on-site surface layer regenerated asphalt pavement apparatus according to the embodiment of the present invention. For example, two sets of heating element units 350U per 1 m2 are arranged, and the heating element unit 350U is again composed of one venturi mixer and two individual heating elements. That is, one venturi mixer is a gas mixer, and serves as a mixer that mixes fuel and air to two individual heating elements and supplies them to each other in common.

However, in the case of the metal-fiber heating element, when the heating element has a temperature of 200 to 300 kW / m < 2 >, the surface temperature of the heating element is low, do. In addition, since a relatively large area is required, there is a disadvantage that installation costs increase and weight increases.

Therefore, in the case of the embodiment of the present invention, it is necessary to reduce the cross-sectional area of the heating body to increase the heat amount per unit area. According to the result of considering the size of the heating element so that the asphalt is not heated unevenly due to the reduced area, the size of the individual heating element is about 0.9 mx 0.15 m . Since the heat amount of each individual heating element is 25,800 kPa / hr, a high temperature can be obtained at a heating rate of 220 kW / m 2 per unit area.

On the other hand, conventionally, in the case of the above-mentioned metal-made heating element, a premixed combustion method in which LPG gas and air are mixed in advance and used as a combustion system is used. For example, a premixed combustion system , There is a disadvantage in that additional power is required since the installation cost, volume increase and electricity (or hydraulic pressure) are used according to the use of the blower.

As another combustion method, there is a partial premixed combustion method using a venturi mixer. When gas is injected into the venturi at a relatively high pressure, some air required for combustion is mixed and supplied to the individual heating element. Although the partial premixed combustion method using the venturi mixer is compact, it can reduce the installation cost and weight, but it is necessary to design an accurate venturi mixer so as to secure a proper amount of air suitable for combustion.

In the heating element for the heating plate of the on-site surface layer regenerated asphalt pavement apparatus according to the embodiment of the present invention, one venturi mixer is required for each of the two heating elements 350. In this case, the heating capacity of about 50,000 kcal / do. In the case of such a venturi mixer, it is desirable to design it in consideration of the gas pressure to be used and the pressure loss of the heating element.

FIG. 13 is a top and bottom perspective view illustrating an individual heating element for forming a heating element unit in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention. FIG. 14 is a cross- And FIG. 15 is a plan view, a front view, and a side view specifically illustrating an individual heating element for forming a heating element unit in a heating element for a heating plate of the on-site surface layer regeneration asphalt paver according to an embodiment of the present invention. Fig. 3 is an exploded perspective view of an individual heating element for forming a heating element unit in a heating element for a heating element;

13 to 15, an individual heating element 350 forming a heating element unit 350U in a heating element for a heating plate of a surface layer regenerated asphalt paver according to an embodiment of the present invention includes a heating surface 351, But may include a flange 352, a spark plug 353, a flame rod 354, a gas nozzle assembly 355, a venturi mixer 356, a distribution plate 357, a barrel 358 and a baffle 359 , But is not limited thereto.

The gas nozzle assembly 355 injects LPG gas and air supplied from the fuel injection tank into the venturi mixer 356.

The venturi mixer 356 is connected to the gas nozzle assembly 355 and serves as a mixer for mixing and supplying a combustible mixture of LPG gas and air injected from the gas nozzle assembly 355. 15, one individual heating element 350 is described as including the gas nozzle assembly 355 and the venturi mixer 356. However, as described above, the two individual heating elements 350 It is preferable to form the heating element unit 350U by using one venturi mixer 356 in common.

15, the baffle 359 divides and supplies a combustible mixture of LPG gas and air ejected from the venturi mixer 356 at an appropriate ratio.

The spark plug 353 serves to ignite the combustible mixture supplied through the baffle 359 to generate a flame.

The flame rod 354 is disposed on the side surface of the spark plug 353 and detects the flame burned by utilizing the electrical property of the flame. Accordingly, it is possible to detect the presence or absence of the flame of the heating element, and to send the fuel cutoff signal and the alarm signal depending on the presence or absence of the flame.

As shown in FIGS. 13 and 15, the heating surface 351 is formed of a metal fiber which is heated to about 800 to 900 ° C. and has an infrared wavelength of 2.9 μm to maximize radiation energy, The heat generated by the flame ignited by the heat exchanger 353 is used to perform radiative heat transfer in an infrared system. At this time, the heating surface 351 is spaced apart from the asphalt pavement by a predetermined distance.

As shown in Figs. 14 and 15, the burner fastening flange 352 is bent so as to fix the individual heating element 350 to the frame made up of the inner case and the outer case.

As shown in FIG. 15, the distribution plate 357 is disposed below the heating surface 351 so that the heating surface 351 can be uniformly heated.

As shown in FIG. 15, the reinforcing bars 358 are provided at a predetermined interval in the lower portion of the distribution plate 357 to support the reinforcing bars 358.

14, since the individual heating element 350 is rectangular and has a long length in one direction, the air and gas mixture required for the combustion is generally supplied to the central portion through the pipe. Therefore, the individual heating element 350, It is preferable that the internal flow path is optimized to uniformly discharge the flame to the front surface. In other words, if the flame is not uniform in the individual heating element 350, the asphalt may be unevenly heated, which may be a problem in a subsequent cutting process. Therefore, the internal flow path of the individual heating element 350 is a flame It is preferable to optimize using the baffle 359, the reinforcing table 358 and the distribution plate 357 as described above so as to come out uniformly.

16 is a view illustrating that a heating element unit is connected to a gas head in a heating element for a heating plate of a field surface regenerated asphalt paver according to an embodiment of the present invention.

16, in the heating plate of the on-site surface regenerated asphalt pavement apparatus according to the embodiment of the present invention, the gas supplied to the venturi mixer 356 of the heating unit unit 350U flows through the gas supply header 370 ). At this time, the gas supply header 370 may be connected through a flexible metal so as to be folded according to the entire vehicle design.

As a result, the preheater heating plates 310, 320 and 330 according to the embodiment of the present invention are composed of two heating plates (front and rear heating plates) of 3 m x 4 m and one heating plate (central heating plate) of 4 m x 4 m, 350) are used in total, and the total calories are 414,000 ㎉ / hr. The individual heating elements 350 may be mounted on the basic frame, and may include four individual heating elements 350 per m < 2 >. The widths of the preheater heating plates 310, 320, and 330 are basically 3 m. In this case, the heating width can be adjusted by configuring the preheater heating plates 310, 320, and 330 so as to be foldable or detachable so as to be foldable. In addition, the preheater heating plates 310, 320, and 330 are preferably installed so that the heating elements at the heating portions of both widths can rotate at 90 degrees.

In addition, the recycler heating plate 340 according to the embodiment of the present invention is constituted by one heating plate of 4m x 4m, and a total of 64 individual heating elements 350 are used, and the total heat amount is 1,650,000r / hr. Like the above-described preheater heating plates 310, 320 and 330, the recycler heating plate 340 is composed of four individual heating elements 350 per m < 2 > and has a variable folding or detachable .

17 is a diagram illustrating a heating element combustion control system for heating a heating element for a heating plate of a field surface regenerated asphalt paver according to an embodiment of the present invention.

17, in order to stably operate the heating element for the heating plate of the on-site surface layer regeneration asphalt pouring apparatus according to the embodiment of the present invention, the LPG fuel supplied from the fuel inflow tank is supplied to the heating element And supplied to the combustion control system to perform functions such as calorimetric control and flame detection. At this time, in the case of the preheater and the recycler according to the embodiment of the present invention, when the ignition and flame detection systems are provided for each of the heating unit 350U, the production cost increases, so that the heating zone is divided into burner zones It is preferable to provide a heating element controller and a gas valve in each heating element zone.

The preheater heating plate and the recycler heating plate according to the embodiment of the present invention need to adjust the heat quantity according to the operating conditions. The amount of heat required to raise the temperature to the target temperature may vary depending on the asphalt temperature and moisture content before the heating with the initial heating plate or the physical properties of the asphalt, so that the operator can adjust the heat amount according to the site conditions.

In the case of the heating element combustion control system according to the embodiment of the present invention, the calorie amount is controlled by adjusting the gas pressure, and the final calorie amount can be controlled by changing the gas flow rate supplied to the venturi mixer of the heating element unit according to the pressure change .

In the arrangement of the heating body unit 350 according to the embodiment of the present invention, four individual heating elements are installed per 1 m < 2 > and two venturi mixers are installed. Each venturi mixer receives LPG gas from a plurality of gas supply headers and supplies LPG gas to the heating unit 350. By providing a blocking side (solenoid valve) between the fuel inlet tank and the gas supply header, If there is a problem, the gas in the relevant part can be cut off. For example, as a safety interlock condition in which the cut-off side (solenoid valve) operates, when a specific region of the flame is not detected, when a pressure lower than or equal to a specific pressure in the gas pipe is sensed, And when it becomes high temperature.

More specifically, in the flame detection interlock condition, flame is lost due to external conditions, burner damage, and air-fuel ratio are poor, and gas pressure interlocking conditions include gas pressure too low or high Gas regulator. In case of overheat prevention temperature interlock condition, main monitoring temperature may be high. In case of emergency stop interlock condition, there is emergency stop by operator.

)은 344,842㎉이며, 아스팔트를 5분동안에 가열해야 하므로 시간을 고려하여 약 414만 ㎉/hr급으로 설계하였다. 이때, 연료주입 탱크의 적재량은 10시간 작업 기준으로 3.5ton인 것이 바람직하다. 또한, 리사이클러 가열판이 발열하는 총열량(

)은 55,000㎉이며 아스팔트를 2분동안에 가열해야 하므로 시간을 고려하여 약 165만kcal/hr급으로 설계하였다. 이때, 연료주입 탱크의 적재량은 10시간 작업 기준으로 1.5ton인 것이 바람직하다. 이때, 본 발명의 실시예에 따른 평균온도 130℃에 도달이 가능한 발열체의 운전은 200㎾/㎡이며, 발열체가 아스팔트로부터 150㎜ 또는 200㎜ 정도 떨어져 설치되었을 때, 아스팔트 평균온도는 각각 162℃와 150℃가 되었다.The total calorific value of the preheater according to the embodiment of the present invention

) Is 344,842 ㎉, and since the asphalt should be heated for 5 minutes, it is designed to be about 4,140,000 ㎉ / hr considering the time. At this time, it is preferable that the loading amount of the fuel injection tank is 3.5 tons on a 10-hour work basis. In addition, the total calorific value of the recycler heating plate

) Is 55,000 ㎉ and asphalt should be heated for 2 minutes, so it is designed to be about 1,600,000 kcal / hr considering the time. At this time, it is preferable that the loading amount of the fuel injection tank is 1.5 ton on a 10-hour work basis. At this time, the operation of the heating element capable of reaching an average temperature of 130 ° C according to the embodiment of the present invention is 200 kW / m 2. When the heating element is installed 150 mm or 200 mm away from the asphalt, the average asphalt temperature is 162 ° C 150 < 0 > C.

As a result, according to the embodiment of the present invention, in a regenerated asphalt paver having a preheater and a recycler for regenerating the asphalt surface layer in the field, a preheater heating plate for heating the asphalt surface layer, a recycler heating plate The heating width of the heating plate of the on-site surface layer regenerated asphalt pavement device can be easily controlled, and also the infrared ray-based heating with high infrared ray efficiency and the relatively high- It is possible to uniformly heat the asphalt pavement at equal intervals by minimizing the thermal deformation of the heating element for the heating plate.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Preheater device 200: Recycler device
300: heating plate (Heating Plate / Heater) 110: engine / operation panel
120: Fuel injection tank 130: Dust collector
140: Self-propelled frame 210: Engine / operating panel
220: Fuel injection tank 230: Dust collector
240: regeneration additive tank 250: installation facility
260: Mixing equipment 270: Cutting equipment
280: Self-propelled frame 310: Preheater front heating plate
320: Preheater central heating plate 330: Preheater rear heating plate
340: Recycler heating plate 350U: Heating unit
350: Individual heating element 351: Heating surface
352: Flange for burner fastening 353: Spark plug
354: Flame Rod / Electrode 355: Gas nozzle assembly
356: Venturi Mixer / Mixer
357: Distribution plate 358: Reinforcing bar
359: Baffle 360: Inner Case
370: Gas Supplying Header

Claims (3)

A preheater device (100) for first heating a surface of an asphalt to be heated and recycled quickly in an old asphalt pavement, a recycler device (200) for secondarily heating a first heated asphalt pavement, and cutting, Wherein the surface-layer regenerated asphalt pavement device comprises:
A preheater heating plate 310, 320, 330 which is divided into a front heating plate 310, a central heating plate 320 and a rear heating plate 330 and installed in the preheater device 100 to heat the asphalt surface layer first; And a recycler heating plate (340) installed at a lower portion of the recycler apparatus (200) and heating the firstarily heated asphalt surface layer, wherein the preheater heating plates (310, 320, 330) and the recycler heating plate Each of the heaters 340 is an infrared-based heating device capable of uniformly heating the asphalt pavement, and is unitized into a heating element unit 350U formed of an individual heating element 350 and a venturi mixer,
The preheater device 100 heats the asphalt from a room temperature to an average heating temperature, the individual heating element 350 is formed of metal fiber, the heating element unit 350U having the individual heating element 350, And the recycler 200 is further supplied with a heat quantity to raise the average heating temperature of the asphalt so that the asphalt can be cut,
The preheater heating plates 310, 320, and 330 may be lowered to a predetermined height from the road surface by the elevating plate elevating apparatus or moved up and down for movement. The preheater heating plate 310, A heating plate 310; A preheater central heating plate 320 installed at a central lower portion of the preheater apparatus 100; And a preheater rear heating plate 330 installed at a rear lower portion of the preheater apparatus 100,
The unitary heating element unit 350U is provided with a plurality of heating element units 350Y, 350Z, 350Z, 350Z, 360Z, 360Z, 360Z, and 360Z so as to facilitate the disposition of the preheater heating plates 310, 320, 330 and the recycler heating plate 340 while reducing the cross- A venturi mixer 356 for mixing and supplying a combustible mixture of the injected LPG gas and air; And two separate heating elements (350) connected in common to the venturi mixer and heated to heat the asphalt pavement and fixed to a frame made up of an inner case and an outer case, wherein each of the individual heating elements has a uniform asphalt pavement Hot plate of on - site surface regenerated asphalt pavement device which can be heated Infrared based heating device. The method according to claim 1,
The individual heating elements 350 forming the heating element unit 350U
A burner fastening flange 352 bent to fix the individual heating element 350 to the frame made up of the inner case and the outer case;
A gas nozzle assembly 355 for injecting LPG gas and air supplied from the fuel injection tank into the venturi mixer 356;
A venturi mixer 356 connected to the gas nozzle assembly 355 and serving as a mixer for mixing and supplying a combustible mixture of LPG gas and air injected from the gas nozzle assembly 355;
A baffle 359 for dividing and supplying a combustible mixture of LPG gas and air ejected from the venturi mixer 356 at an appropriate ratio; And
And a spark plug (353) serving to ignite the combustible mixture supplied through the baffle (359) to generate a flame. 3. The method of claim 2,
The individual heating elements 350 forming the heating element unit 350U
A flame rod 354 disposed on a side surface of the spark plug 353 and detecting a flame to be burned by utilizing electrical characteristics of the flame;
A heating surface 351 formed on the burner fastening flange 352 and formed of metal fiber to radiate heat by the flame ignited by the spark plug 353 in an infrared manner;
A distribution plate 357 disposed below the heating surface 351 to uniformly heat the heating surface 351; And
And a reinforcing bar (358) installed at a lower portion of the distribution plate (357) at regular intervals to support the asphalt pavement.

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