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WO2016042927A1 - Finisseusse d'asphalte - Google Patents

Finisseusse d'asphalte Download PDF

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Publication number
WO2016042927A1
WO2016042927A1 PCT/JP2015/071751 JP2015071751W WO2016042927A1 WO 2016042927 A1 WO2016042927 A1 WO 2016042927A1 JP 2015071751 W JP2015071751 W JP 2015071751W WO 2016042927 A1 WO2016042927 A1 WO 2016042927A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric heating
heating device
asphalt mixture
planar electric
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/071751
Other languages
English (en)
Japanese (ja)
Inventor
大庭　真治
正信 定安
鈴木　英治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gaeart Co Ltd
Original Assignee
Gaeart TK Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gaeart TK Co Ltd filed Critical Gaeart TK Co Ltd
Priority to JP2015559362A priority Critical patent/JP5913760B1/ja
Publication of WO2016042927A1 publication Critical patent/WO2016042927A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ

Definitions

  • the present invention relates to an asphalt finisher that stores and spreads an asphalt mixture.
  • an asphalt mixture is manufactured at a compound factory, transported by a dump truck, and charged into an asphalt mixture input section of an asphalt finisher.
  • the asphalt mixture charging unit has a hopper that loads and temporarily stores the charged asphalt mixture, and a bar feeder that conveys the loaded asphalt mixture to the screed side.
  • the asphalt mixture conveyed to the screed side is spread and leveled to perform pavement construction.
  • the asphalt mixture is required to be paved in a preset temperature range from the viewpoint of ensuring quality.
  • problems such as rapid temperature drop of the asphalt mixture and difficulty in obtaining a predetermined degree of compaction are likely to occur. In some cases.
  • problems such as dragging and dragging holes on the leveling surface and problems such as insufficient adhesion of the joint portion of the pavement may occur.
  • measures can be taken such as slightly raising the temperature of the asphalt mixture at the time of shipping to the composite material factory, or placing a heat insulating sheet on the loading platform of the dump truck during transportation.
  • measures can be taken such as slightly raising the temperature of the asphalt mixture at the time of shipping to the composite material factory, or placing a heat insulating sheet on the loading platform of the dump truck during transportation.
  • the heat released between the asphalt finisher and the paving work after the asphalt mixture is charged cannot be ignored.
  • the temperature of the hopper after preheating is about 60 degrees at the maximum. Since the temperature of the asphalt mixture charged from the dump truck is usually about 150 to 200 ° C., the preheating temperature is preferably as high as possible.
  • the elapsed time from the start of the engine to the maximum temperature was about 30 to 90 minutes. From the viewpoint of shortening the construction period, it is preferable that the time to reach the set preheating temperature is short.
  • exhaust is caused to flow through a flow path provided in two steel plates. If the distance between the steel plates is not less than 25 mm and the channel width is not more than 200 mm, the channel does not function sufficiently. In consideration of the size of the flow path, there is a portion where the flow path is not provided in the hopper or the bar feeder, and as a result, temperature unevenness may occur.
  • a flow path cannot be provided in the front wing or the like.
  • the exhaust temperature is different between the upstream and downstream of the flow path, and there is a risk of temperature unevenness.
  • the preheating temperature is passively determined, but it is preferable that the preheating temperature can be set and adjusted principally. Furthermore, it is preferable that the preheating temperature can be partially set and adjusted.
  • This invention solves the said subject, and aims at providing the asphalt finisher which can heat an asphalt mixture injection
  • the asphalt finisher of the present invention that solves the above problems includes a heating device.
  • the heating device heats the asphalt mixture charging part of the asphalt finisher.
  • the heating device includes an inner plate member, an outer plate member, and a planar electric heating device.
  • the inner plate member and the outer plate member face each other and constitute a part of the asphalt mixture charging part.
  • the planar electric heating device is in close contact with the inner side of the inner plate member.
  • the asphalt mixture charging part can be heated to a high temperature in a short time without unevenness by the planar electric heating device.
  • the asphalt mixture charging portion is composed of constituent members such as an upper hopper wing, a lower hopper wing, a hopper rear surface, a front wing, a rear plate, and a bar feeder.
  • the heating device is provided in one or more of the components.
  • planar electric heating devices preferably, a plurality of the planar electric heating devices are provided.
  • the plurality of planar electric heating devices are electrically in parallel.
  • the set temperature of the planar electric heating device provided at the lower position is set to be equal to or higher than the set temperature of the planar electric heating device provided at the upper position.
  • the set temperature of the planar electric heating device provided in the lower hopper wing is set so as to be equal to or higher than the set temperature of the planar electric heating device provided in the upper hopper wing.
  • a corner portion is formed in a continuous portion between the upper hopper wing and the lower hopper wing of the asphalt mixture charging portion.
  • a plurality of planar electric heating devices are provided in the upper hopper wing and / or the lower hopper wing. In the plurality of planar electric heating devices, the set temperature of the planar electric heating device closest to the corner is set to be equal to or higher than the setting temperature of the other planar electric heating devices.
  • the heating device has a three-layer structure of a planar electric heating device, a convection layer, and a heat insulating sheet.
  • the heat insulating sheet is in close contact with the inside of the outer plate member.
  • a convection layer is provided between the planar electric heating device and the heat insulating sheet.
  • ⁇ Temperature unevenness is further reduced by the convection layer.
  • a synergistic effect can be expected by combination with electrical parallel.
  • the present invention it is possible to heat the asphalt mixture charging section in a short time and uniformly at a high temperature as compared with the prior art. As a result, the temperature drop of the asphalt mixture can be more reliably suppressed by preheating and heat retention than in the prior art.
  • FIG. 1 is a schematic configuration diagram of an asphalt finisher.
  • the asphalt finisher includes a crawler 1 for traveling, a driver's seat 2 for an operator to perform driving work, an asphalt mixture input unit 3 provided in front of the driver's seat 2 and into which the asphalt mixture is input from a dump truck, Various member devices such as a screw spreader 4 provided behind the driver's seat 2 for uniformly spreading the asphalt mixture to the paving width, and a screed 5 with a tamper provided behind the screw spreader 4 for compacting the asphalt mixture. It is composed of
  • FIG. 2 is a configuration diagram of the asphalt mixture charging unit 3.
  • the asphalt mixture charging unit 3 includes a hopper 6, a bar feeder 7, a rear plate 8, and a front wing 9.
  • the hopper 6 is formed by opposingly arranging a pair of outer plates that are substantially L-shaped on the left and right with the bar feeder 7 in between.
  • the outer plate of the hopper 6 has a posture in which the bottom plate surface is substantially parallel to the bar feeder 7 by the expansion and contraction operation of the cylinder (usually, in this posture, the asphalt mixture is introduced and temporarily stored) and the left and right outer sides are The posture can be changed to lift and slide the asphalt mixture to the bar feeder 7 side.
  • the hopper 6 includes a side upper step 61, a side lower step 62, and a hopper rear surface 63.
  • the upper side surface 61 and the lower side surface 62 are continuous so as to form a substantially L-shaped wing.
  • the substantially L shape has a corner portion 64.
  • the hopper rear surface 63 is arranged corresponding to a substantially L-shape.
  • the bar feeder 7 conveys the charged asphalt mixture backward.
  • the bar feeder 7 includes a bottom plate 71 and a rotating portion 72 that is rotatably arranged around the bottom plate (FIG. 3).
  • the rear plate 8 is provided in front of the driver's seat 2 and constitutes a part of the asphalt finisher main body. While the hopper 6 is variable, the rear plate 8 is unchanged.
  • the asphalt mixture charging unit 3 includes a heating device 10.
  • the heating device 10 is provided in the hopper 6 in principle, but may be provided in the bar feeder 7 (bottom plate 71), the rear plate 8, and the front wing 9.
  • the heating device 10 may be provided on the rear plate 8 and / or the front wing 9.
  • FIG. 4 is a configuration diagram of the heating device 10. Although the example provided in the hopper 6 is demonstrated, the example provided in the bar feeder 7, the rear board 8, and the front wing 9 is also the same structure.
  • the hopper 6 has a double plate structure composed of two steel plates 11 and 12, and a space extending along the steel plate surface is formed between the inner steel plate 11 and the outer steel plate 12.
  • the side into which the asphalt mixture is charged is the inside.
  • the electric heating sheet 13 is in close contact with the inner side (space side) of the inner steel plate 11.
  • the electric heating sheet 13 is a sheet formed by meandering heating wires, and generates heat due to electric resistance during energization.
  • the power source of the electric heating sheet 13 is a generator and a battery that are standardly installed in the asphalt finisher main body. However, when a sufficient amount of electricity cannot be supplied, an additional generator is mounted on the asphalt finisher.
  • the heat insulating sheet 14 is in close contact with the inner side (space side) of the outer steel plate 12.
  • a convection layer (space) 15 is formed between the electric heating sheet 13 and the heat insulating sheet 14.
  • the thickness of the electrothermal sheet 13 is 3 mm
  • the thickness of the convection layer 15 is 5 mm
  • the thickness of the heat insulating sheet 14 is 4 mm.
  • a three-layer structure is formed at a distance of 12 mm between the steel plates.
  • the heating device 10 is provided individually for each of the upper side surface 61, the lower side surface 62, and the hopper rear surface 63.
  • the electrothermal sheets 13 provided on the respective constituent members 61 to 63 are electrically in parallel.
  • FIG. 5 is an example of power consumption allocation.
  • FIG. 5A shows a general overview
  • FIG. 5B shows details of the left side and center front
  • FIG. 5C shows details of the right side.
  • a temperature sensor 16 is provided on the inner steel plate 11 corresponding to each electric heating sheet 13.
  • the control device 17 (not shown) adjusts the energization amount so that the temperature detected by the temperature sensor 16 becomes a set temperature (for example, 80 degrees).
  • an outside air sensor 18 (not shown) may be provided, and the control device 17 may vary the set temperature between 50 and 120 degrees based on the temperature detected by the outside air sensor 18. Specifically, the lower the outside air temperature, the higher the set temperature.
  • the inner steel plate 11, the outer steel plate 12, the electric heating sheet 13, the heat insulating sheet 14, the convection layer 15, the temperature sensor 16, and the control device 17 constitute a heating device 10 that heats the asphalt mixture charging unit 3. .
  • the asphalt mixture is manufactured at a compound factory and transported to a construction site by a dump truck.
  • the asphalt finisher waits until the dump truck arrives at the construction site.
  • countermeasures are required for construction in an environment where the outside air temperature is 5 ° C or lower. Furthermore, it is preferable to suppress the temperature drop of the asphalt mixture even in an environment where the outside air temperature is low.
  • the asphalt finisher preheats (heats) the asphalt mixture charging unit 3 as a temperature drop suppression measure.
  • the surface temperature of the hopper 6 reached the set temperature (80 ° C.) in about 20 minutes by the heating device 10 under the environment of the outside air temperature of 5 ° C.
  • the control device 17 maintains the set temperature. In this state, the asphalt mixture is put into the hopper 6 from the dump truck.
  • the temperature of the asphalt mixture charged from the dump truck is usually about 150 to 200 ° C.
  • the temperature detected by the temperature sensor 16 became 120 ° C. or higher. It is presumed that the temperature of the asphalt mixture that is initially charged and contacts the surface of the hopper 6 is also 120 ° C. or higher.
  • the asphalt mixture temporarily stored in the hopper 6 is conveyed by the bar feeder 7, spread by the screw spreader 4, and spread by the screed 5.
  • the heating apparatus 10 continues to operate after the asphalt mixture is charged and also during paving.
  • the preheat application function operates as a heat retention function.
  • the elapsed time from the start of the engine to reaching the maximum temperature was about 30 to 90 minutes.
  • the set temperature is reached in 20 to 60 minutes.
  • the heating device 10 can be installed on the bar feeder 7, the rear plate 8, and the front wing 9 by downsizing the heating device 10. Moreover, it is also possible to install the heating apparatus 10 in almost the entire area of the hopper 6. Thereby, it can heat evenly.
  • the preheating temperature depends on the outside air temperature and the exhaust temperature (passive), whereas in this embodiment, the preheating temperature can be set and adjusted (primary).
  • the asphalt mixture charging unit 3 can be heated in a short time without unevenness at a high temperature, and the temperature drop of the asphalt mixture can be reliably suppressed.
  • the heating device 10 includes a heat insulating sheet 14 and a convection layer 15.
  • the heat from the electric heating sheet 13 is directly transmitted to the inner steel plate 11, and after being circulated through the convection layer 15, is indirectly transmitted to the inner steel plate 11. Thereby, temperature unevenness is reduced.
  • the region is divided into a plurality of regions, and the electrothermal sheet 13 is electrically arranged in each region in parallel.
  • the preset temperature of the electric heating sheet 13 in each region can be individually set (described later).
  • the portion cannot be heated and temperature unevenness occurs in the short term.
  • the electrothermal sheet 13 is electrically arranged in parallel in each constituent member and each region. Thereby, the preset temperature of each electric heating sheet 13 can be individually set.
  • the set temperature of the upper side 61 of the hopper and the hopper rear surface 63 is set to 80 degrees, and the set temperature of the lower side 62 and the front wing 9 is set to 90 degrees. Further, the set temperature of the bar feeder 7 is set to 95 degrees.
  • the set temperature of the upper side 61 of the hopper is set to 80 degrees and the set temperature of the lower side 62 of the hopper is set to 90 degrees, while only the region closest to the corner 64 of the upper hopper side 61 and the lower side 62 is set.
  • the temperature is 100 degrees. That is, the set temperature closest to the corner 64 is set to be equal to or higher than the set temperature of the other region.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

La présente invention vise à réaliser le chauffage d'une partie de chargement de mélange d'asphalte de façon uniforme à une température élevée en un court laps de temps par rapport à l'art antérieur. Une plaque d'acier intérieure 11, une plaque d'acier extérieure 12, une feuille de chauffage électrique 13, une feuille calorifuge 14, et une couche de convection 15 forment un dispositif de chauffage 10 qui chauffe une partie de chargement de mélange d'asphalte 3. Une trémie 6 ou similaire a une structure à double plaque. Entre la plaque d'acier intérieure 11 et la plaque d'acier extérieure 12, un espace s'étendant le long des surfaces de plaques d'acier est formé. La feuille de chauffage électrique 13 est en contact étroit avec le côté intérieur de la plaque d'acier intérieure 11. La feuille calorifuge 14 est en contact étroit avec le côté intérieur de la plaque d'acier extérieure 12. Entre la feuille de chauffage électrique 13 et la feuille calorifuge 14, la couche de convection 15 est formée.
PCT/JP2015/071751 2014-09-17 2015-07-31 Finisseusse d'asphalte Ceased WO2016042927A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015559362A JP5913760B1 (ja) 2014-09-17 2015-07-31 アスファルトフィニッシャ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014189141 2014-09-17
JP2014-189141 2014-09-17

Publications (1)

Publication Number Publication Date
WO2016042927A1 true WO2016042927A1 (fr) 2016-03-24

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ID=55532971

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PCT/JP2015/071751 Ceased WO2016042927A1 (fr) 2014-09-17 2015-07-31 Finisseusse d'asphalte

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JP (2) JP5913760B1 (fr)
WO (1) WO2016042927A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018150714A (ja) * 2017-03-13 2018-09-27 世紀東急工業株式会社 アスファルトフィニッシャ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344804Y2 (fr) * 1989-06-13 1991-09-20
JPH11209918A (ja) * 1998-01-29 1999-08-03 Shin Caterpillar Mitsubishi Ltd アスファルトフィニッシャのホッパ保温装置
JP2000054312A (ja) * 1998-08-04 2000-02-22 Kajima Corp アスファルトフィニッシャ
JP2013113028A (ja) * 2011-11-30 2013-06-10 Gaeart Tk:Kk アスファルト舗装工法およびアスファルトフィニッシャ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344804Y2 (fr) * 1989-06-13 1991-09-20
JPH11209918A (ja) * 1998-01-29 1999-08-03 Shin Caterpillar Mitsubishi Ltd アスファルトフィニッシャのホッパ保温装置
JP2000054312A (ja) * 1998-08-04 2000-02-22 Kajima Corp アスファルトフィニッシャ
JP2013113028A (ja) * 2011-11-30 2013-06-10 Gaeart Tk:Kk アスファルト舗装工法およびアスファルトフィニッシャ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018150714A (ja) * 2017-03-13 2018-09-27 世紀東急工業株式会社 アスファルトフィニッシャ

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Publication number Publication date
JP2016118094A (ja) 2016-06-30
JP5913760B1 (ja) 2016-04-27
JPWO2016042927A1 (ja) 2017-04-27

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