JPS6262201B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road surface heating method and apparatus using high temperature radiation.

In repair work for asphalt concrete road surfaces, there is a method in which a vehicle is equipped with a road surface heating device, the heating device heats and softens the road surface, and then the road surface is repaired. For example, for repair work, it is necessary to heat the area 20 to 50 mm below the road surface to around 60 degrees Celsius.

In this case, as a prior art, for example, the first
The type using the direct flame burner shown in the figure is widely put into practical use.

However, since a plurality of burners 2 provided in the combustion chamber 1 are used individually, adjustment of the burners 2 is complicated, and it is difficult to uniformly adjust the heating capacity according to the site situation.

In addition, since it is directly heated by the direct flame of the burner 2, the high temperature part of the flame hits the road surface 3 directly, and the road surface 3 is overheated due to the high temperature radiant heat, causing smoke and
There is a risk of fire.

In order to eliminate these drawbacks, a radiation heating type device as shown in FIG. 2 has also been put into practical use.

However, since the heating is not direct and the combustion exhaust gas is released as is from the gas outlet 5, the thermal efficiency is poor, and cold air enters through the gap between the radiant plate 4 and the road surface 3, causing the radiant heat to diffuse. There were flaws.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to uniformly heat the road surface using radiant heat emitted from the radiant plate at high temperatures, and also heat the radiant plate to heat the exhaust gas whose temperature has dropped to the road surface. The purpose of the present invention is to provide a road surface heating method and device that improves thermal efficiency by reusing the road surface.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are one embodiment thereof.

FIG. 3 shows a radiant road heating device according to the present invention that is installed in a vehicle, and roughly shows a heater main body 10.
and a heat retention chamber 20.

The heater main body 10 includes a combustion chamber 11 made of a fire-resistant wall, a burner 12 attached to the combustion chamber 11, and a radiant plate 13 attached to the lower surface of the combustion chamber 11. Heater body 10
A curtain 14 made of, for example, asbestos is attached to three sides of the lower surface of the vehicle so as to hang down over the road surface 30. The high-temperature exhaust gas is disposed on the burner 12 side of the radiant plate 13 on the road surface 30.
An exhaust gas guide 23 is provided at the exhaust gas outlet hole 15 so as not to directly hit the exhaust gas.

The heat retention chamber 20 is formed so as to cover the road surface 30 with a heat insulator 21 on the rear side of the heater main body 10 and curtains (not shown) provided on both sides.

Therefore, the radiant plate 13 is heated by the combustion gas generated by the burner 12, and the radiant plate 13 is heated as in the conventional case.
3 to heat and soften the road surface 30.

After heating the road surface 30 via the radiant plate 13, the exhaust gas is guided to the exhaust gas guide 23 through the exhaust gas outlet hole 15, enters the heating chamber 16, contributes to the heating of the road surface 30, and then enters the heat retention chamber 20. flows into. After the road surface 30 is reheated in the heat retention chamber 20, it is discharged from the exhaust port 22.

Note that the heat retention chamber 20 may be used as a preheating chamber by being attached to the front side of the heater main body 10, and it goes without saying that the burner 12 may be attached to the advancing direction side.

As is clear from the above description, since the present invention heats the road surface by radiation through the radiant plate, it is possible to heat the road surface uniformly, and smoke and ignition due to local heating can be prevented. Moreover, the exhaust gas whose temperature has been lowered by radiation heating flows from the exhaust gas outlet hole along the road surface or into the heat storage chamber, and the exhaust gas reheats the road surface, increasing thermal efficiency and reducing fuel costs. effective.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment of road surface heating using a direct flame method, Fig. 2 is a schematic diagram of an embodiment of conventional radiant heating, Fig. 3 is a schematic diagram of an embodiment according to the present invention, and Fig. 4 is a schematic diagram of an embodiment of road surface heating using a direct flame method. Overall view taken from line AA in FIG. 3. 10...Heater main body, 11...Combustion chamber, 12
... Burner, 13 ... Radiant plate, 14 ... Curtain, 15 ... Exhaust gas outlet hole, 16 ... Heating chamber, 2
0... Heat retention chamber, 21... Heat insulator, 22... Exhaust port, 23... Exhaust gas guide, 30... Road surface.

Claims (1)

[Claims] 1. The heat of the combustion gas generated by the burner is transmitted to the road surface via a radiant plate provided on the lower surface of the combustion chamber, and after the heat transfer, the exhaust gas whose temperature has been lowered exits from the combustion chamber. A road surface heating method characterized in that the water is caused to flow along the same road surface. 2. A road surface heating device comprising a combustion chamber equipped with a burner, a radiant plate provided on the lower surface of the combustion chamber, and an exhaust gas outlet hole provided below the combustion chamber on the burner side of the radiant plate. . 3. Claim 2, characterized in that an exhaust gas guide is provided below the exhaust gas outlet hole.
The road surface heating device described in . 4 A combustion chamber equipped with a burner, a radiant plate provided on the lower surface of the combustion chamber, and a heat retention chamber that introduces exhaust gas from the exhaust gas outlet hole provided below the combustion chamber on the burner side of the radiant plate. A road surface heating device characterized by: