JPH028402A - Early cooling device for pavement surface - Google Patents

Abstract

PURPOSE:To cool a pavement surface forcibly at an early stage by ejecting air and water against the pavement surface from an air spay section installed to a section oppositely faced to the pavement surface of a tamping roller, on which an air blower and a water pump are loaded, and a water spray section. CONSTITUTION:An air blower 4 connected to a cooling device 10 mounted on the lower side of a tamping roller 1 by pipings 6, 7 and a water pump 5 are loaded on the tamping roller 1, and the cooling device 10 is composed of an air spray section 12 consisting of a large number of air nozzles 11 spraying air and a water spray section 14 made up of a plurality of water nozzles 13 injecting water. The tamping roller 1 is self-advanced and the asphalt pavement surface is rolled while water is injected toward the pavement surface from the water nozzles 13, a large quantity of air are blasted from the air nozzles 11, and the pavement surface is cooled rapidly by the heat of vaporization of water. Accordingly, the term of work can be shortened, and cost can be reduced.

Description

[Detailed Description of the Invention] [Industrial Applications] The present invention relates to an early cooling device for a paved surface that cools an asphalt paved surface to a usable temperature in a short time by installing a cooling device on a compaction roller. It is.

[Prior Art] It is well known that paved roads that have been in use for a long period of time need to be repaired due to deterioration of the road surface due to wear due to spiked tires in winter or ruts caused by the movement of the pavement itself. It is as follows.

Incidentally, known road surface repair methods include a resurfacing method, a cutting overlay method, and an on-site reclamation method. The resurfacing method is a method of completely removing the pavement surface and resurfacing it, and the roadbed may also be improved at the same time. Although it is accurate and makes the road surface look good, it is expensive and takes a long time to complete. It also has drawbacks. On the other hand, the cutting overlay method and on-site regeneration method aim to correct the formation of the pavement surface by scraping off the uneven parts of the road surface.
This is a method of paving to the standard finished height. The construction process includes road surface heating, cutting, cutting and paving, and asphalt paving.

This renovation method has the advantage of being able to be constructed within a limited time.

[Problem to be solved by the invention] By the way, according to the construction method described above, the temperature of the leveled asphalt pavement is a predetermined temperature, for example, 60'C.
Since it cannot be used unless it is as follows, there are various problems. In other words, since these construction works are generally carried out with roads closed, it is desirable to complete them in a short time, but asphalt that has been heated to around 160°C does not easily cool down to a usable temperature, so the asphalt casting time is shortened. For example, these works are usually carried out between 9:00 pm and 5:00 am at night when traffic volume is reduced, but in order to allow for cooling time for the asphalt, asphalt pouring can be carried out at around 3:00 am. However, the construction work still needs to be completed, making it difficult to achieve the amount of construction work as planned. This tendency is particularly strong in the summer when temperatures are high.

[Problems to be Solved] Therefore, the present invention provides a device that can increase the yield of paving within a limited period of time, for example, during a road closure, that is, a device that forcibly cools the paved surface. The purpose is to provide an early cooling device that can

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided with a cooling device on the part facing the paved surface of the compaction roller, and the cooling device is equipped with a cooling device that spouts water and air. Consists of nozzles,
The water pump and air blower for boosting the pressure of water or air are configured to be driven by the power of the compaction roller, such as an engine or a battery. In this way, the present invention mounts an air blower driven by the power provided on the compaction roller and a water pump similarly driven on a compaction roller consisting of a tire roller, a road roller, etc. On the part of the roller facing the paved surface, there is an air blowing section consisting of a plurality of air nozzles that blows air from the air blower toward the road surface, and an air blowing section that sprays water from the water pump onto the road surface as well. It is composed of a water sprinkling section consisting of a plurality of water nozzles that spray water toward the target.

[Operations and Effects of the Invention] Since the present invention is constructed as described above, in its use, the rolling compaction roller is driven over the leveled asphalt pavement surface while cooling the asphalt toward the pavement surface. The device's air nozzle blows a large amount of low-pressure air, and the water nozzle sprays water in the form of a mist. The blown air cools the paved surface and promotes water evaporation. The heat of vaporization of the water is thus removed from the pavement surface and a cooling drop is achieved with a small amount of water. In other words, the temperature of the paved surface is accelerated, and the time from the completion of paving to the time when it can be put into service is greatly shortened.

In particular, according to the present invention, since the cooling device is provided on the compaction roller, there is an advantage that cooling is carried out simultaneously with the compaction of the road surface, and a dedicated cooling vehicle is not required. Furthermore, since the compaction roller is also equipped with a water tank, it has the advantage that it can be provided at low cost.

[Preferred Embodiment] In implementing the present invention, the rolling pressure roller can be a tire roller or a road roller. The air blower mounted on the compacting roller is preferably a large-capacity, low-pressure blower type, and for that purpose it is preferably driven by a hydraulic motor. The hydraulic motor is of course driven by the hydraulic pressure of a hydraulic pump driven by the compaction roller engine. The water pump can also be driven by a battery attached to the compaction roller. In addition, during implementation, a device to adjust the amount of water to be injected and the amount of air to be blown, such as a throttle valve between the water pump and the water nozzle, and a flow rate adjustment device to adjust the rotation speed of the air blower. It is desirable to provide a valve. If the amount of water is larger than the amount of air blown, a water film will be formed on the pavement surface, inhibiting heat dissipation. In other words, the heat exchange efficiency will decrease, and if the amount of spray is small, vaporization will not be promoted sufficiently and the cooling effect will decrease, but the throttle valve and flow rate adjustment valve can adjust the amount of air and water to the optimal ratio. It is.

[Example] An embodiment of the present invention will be described below with reference to the accompanying drawings.

Now, referring to FIG. 1, the early cooling device is composed of a compaction roller 1 and a cooling device 10. As is well known, the compaction roller 1 is a tire roller, a road roller, or the like, and includes a pair of compaction rollers 2.3 at the front and rear of the vehicle body. The vehicle body is supported by these rollers.

The compaction roller 1 is self-propelled, and is therefore equipped with an engine, and also includes a battery for starting the engine, a hydraulic pump driven by the engine, a water tank, and the like.

The compaction roller 1 is equipped with an air blower 4 driven by a hydraulic motor and a water pump driven by a battery, and the blower and water pump are connected to a cooling device 10, which will be described in detail later, through piping 6.7. It is extending. In addition, the other reference numerals 8 and 9 in FIG. 1 indicate a handle and a seat, respectively.

The cooling device 10 is provided at a portion facing the paved surface, that is, below the compaction roller 1. And this cooling device is the second
As shown in the figure and FIG.
．． It is long enough to fit between 3.

The cooling bag W10 includes an air blowing section 12 consisting of a large number of air nozzles 11, 11... that blow air onto the paved surface;
The water spraying section 14 includes a plurality of water nozzles 13, 13, . . . that spray water.

The air nozzles 11, 11, . . . are attached to a substantially box-shaped pressure box 15. Air pressurized by the blower 4 is supplied to the pressure box 15 through a pipe 6. Water nozzles 13.13... are also provided on the pressure pipe 16.16. Two pressure pipes are provided at a predetermined interval, and pressure water is supplied from a water pump 5 to these pressure pipes through a pipe 7.

Since the present embodiment is configured as described above, the asphalt paved surface can be compacted by causing the compaction roller to run on its own. And water nozzle 13.13...
・Spray water from the air nozzle 11 toward the paved surface.
．． When a large amount of air is blown from 11..., the pavement surface is rapidly cooled by the heat of vaporization of water. At this time, since the cooling device 1° is approximately equal to the width of the rolling roller, the cooling width is approximately equal to the rolling width, and the construction efficiency is improved.

The temperature of the asphalt after it is poured reaches 120°C, so if it is left to cool naturally, the cooling will be slow as shown by curve A in Figure 4. For example, at 60°C of the open temperature
It takes t1 time to reach C, but when this example is applied, the open temperature is reached in t2 time as shown by curve B.
The cooling time can be shortened by (tl - t2).

``Summary'' As detailed above, according to the present invention, the cooling time can be shortened by 11 times compared to the conventional natural cooling type.
Paving work time can be increased compared to conventional construction methods. As a result, the amount of construction work will be increased by - days, that is, the amount of work that can be done during the time when the road is closed will be increased, so the construction period can be shortened and costs can be reduced. Moreover, the early cooling device can be constructed simply by equipping a conventional compaction roller with a cooling device, which has a great practical effect.

[Brief explanation of the drawing]

1, 2, and 3 show one embodiment of the present invention, in which FIG. 1 is a side view thereof, FIG. 2 is an enlarged side view of the cooling device, FIG. 3 is a bottom view thereof, and FIG. The figure is a comparative diagram showing the cooling state of the paved surface in the case of the present embodiment and the case of the conventional example. 1... Compaction roller 10... Cooling device 11.11
... Air nozzle 12 ... Air blowing part 13
．． 13...Water nozzle 14...Written amendment to water spraying department (method) July 28, 1989 Director General of the Patent Office Yoshi 1) Moon Yi 1, Indication of case Japanese Patent Application No. 1983-51679 2
, Title of the invention Early cooling device for paved surfaces 3, Relationship to the amended person's case Applicant's address 5-3-1 Kojimachi, Chiyoda-ku, Tokyo Name
Kashima Road Co., Ltd. Representative: Amaha-husband 4, Agent: 105 Address: 3rd floor, Fujiki Building, 2-13-3 Nishi-Shinbashi, Minato-ku, Tokyo Name (7169) Patent attorney Toshitada Takahashi and 1 other person Telephone: 580
-7160 5. Date of amendment order 7. Contents of amendment (1) "Name of invention" in line 2 of page 1 of the specification is amended to "title of invention." (2) Amend "Claims for Utility Model Registration" on the 4th line of page 1 of the specification to read "Claims". (3) “Detailed explanation of the invention” on page 1, line 16 of the specification
amend it to "detailed description of the invention".

Claims (1)

[Claims] A compaction roller consisting of a tire roller, a road roller, etc. is equipped with an air blower driven by the power installed in the compaction roller and a water pump similarly driven. On the facing part, there is an air blowing section consisting of a plurality of air nozzles that ejects air blown from the air blower toward the road surface, and a plurality of air nozzles that similarly eject water sent from the water pump toward the road surface. 1. An early cooling device for a paved surface, characterized by comprising a cooling device comprising a water sprinkling section consisting of individual water nozzles.