JPH0151607B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a road heating device.

1 to 4 show a conventional road heating device, in which fuel gas is supplied from an LPG cylinder 2 mounted on a traveling vehicle body 1 to a burner unit 3 disposed below the vehicle body 1, where it is heated to a high temperature. produces combustion gas,
The combustion gas heats the wire mesh 4 at the bottom of the burner unit 3, and the radiant heat from the wire mesh 4 heated in this way heats the asphalt of the road. In this case, the asphalt of the road is also heated by the convection of combustion gas.

In such a road heating device that mainly uses radiation heating, for example, if the traveling vehicle 1 does not advance for some reason and stagnates in a certain place, the asphalt on the road will be overheated and deteriorated, or the asphalt will burn. There is a drawback.

Another disadvantage of this type of system is that it is difficult to use only gas fuel.

The present invention was proposed in order to eliminate such drawbacks, and the present invention connects the burner part disposed at the upper part of the vehicle body and one end part of the skirt part disposed at the lower part of the vehicle body by a combustion gas supply duct. Along with connecting,
The other end of the skirt portion and the burner portion are connected by an exhaust duct equipped with an exhaust fan, and a metal member such as a rotary calffire, a groover, etc. that contacts the asphalt road surface is mounted within the skirt portion. This invention relates to a road heating device characterized by the following.

As described above, in the road heating device according to the present invention, one end of the skirt section disposed at the bottom of the vehicle body is connected to the burner section disposed at the upper part of the vehicle body through the combustion gas supply duct. The other end of the skirt section is connected to the burner section through an exhaust duct in which an exhaust fan is installed, so that the combustion gas of the burner section flows into the skirt section through the combustion gas supply duct. The combustion gas is supplied from the burner section, flows over the road surface, is connected to the other end of the skirt section, and is circulated to the burner section via an exhaust duct in which an exhaust fan is interposed, and thus exits from the burner section. The road is heated by convective heat transfer.

In this way, the combustion gas is supplied to the road surface from the burner section to heat the road, and then circulated by the exhaust fan, increasing thermal efficiency.Furthermore, the combustion gas is forced to circulate through both the burner fan and the exhaust fan. Therefore, the pressure in the skirt portion is close to atmospheric pressure, and even if the sealing in the skirt portion is insufficient, the amount of combustion gas leaking is small.

Since a metal member such as a rotary scarf eye or a groover that contacts the asphalt is disposed inside the skirt portion, the metal member heated by the combustion gas bites into the road surface and presses against the road surface. is heated by conduction heat. Thus, according to the present invention, the road surface is effectively heated by convection heat transfer by the combustion gas and contact conduction heat from the metal member.

As described above, according to the road heating device according to the present invention, the burner section is provided on the traveling vehicle body separated from the road, and the combustion gas generated in the burner section is disposed at the lower part of the traveling vehicle body. The road surface is heated by supplying it to the skirt part, which is equipped with a metal member such as a groover that comes into contact with the road surface asphalt, which lowers the combustion gas temperature to 600-800℃ compared to the 1000-1200℃ of conventional equipment. Since the road surface asphalt can be heated by heating the road surface asphalt, there is no risk of the road surface asphalt deteriorating or burning even if the traveling vehicle remains in one place for a while or the combustion gas temperature becomes slightly high. Also, unlike the conventional devices described above, which limit the amount of fuel that can be used because combustion gas is generated near the road, the present invention can be used because the burner portion is provided at one location on the vehicle body. There are no restrictions on fuel.

The road heating device according to the present invention can heat the road at low cost with a simple configuration as described above, and even if the device is stagnant in one place for a while or the combustion gas temperature becomes a little high, the road surface asphalt can be heated. There is no risk of deterioration or asphalt burning.

The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 11 denotes a running vehicle body, which has a burner section 12 at its upper part and a skirt section 13 at its lower part, and one end of the skirt section 13 is connected to the burner section 12 through a combustion gas supply duct 14. connected,
The other end is connected to the exhaust duct 15. Further, the exhaust duct 15 is connected to the burner section 12, and an exhaust fan 16 is interposed therebetween.

Further, a metal rotary calf eye 17 is disposed on the skirt portion 13 and is in contact with the road surface.

Since the illustrated device is constructed as described above, the combustion gas emitted from the burner 12 is supplied to the skirt section 13 from one end thereof through the supply duct 14, heating the asphalt road surface, and at the same time heating the asphalt road surface. After being heated, it is circulated through the exhaust duct 15 to the burner section 12 by the exhaust fan 16.

The rotary carificer 17 heated by the combustion gas as described above heats the road surface asphalt by conduction heat while biting into the road surface.

In the illustrated embodiment, the combustion gas generated in the burner section 12 on the traveling vehicle body 11 is made to flow over the road surface in the vehicle body lower skirt section 13 to heat the same surface, and is also heated inside the skirt section 13. By heating the installed rotary carifice eye 17 and directly heating the road surface, the combustion gas temperature is reduced to 600-800°C from 1000-1200°C in the conventional device. Therefore, there is no risk that the road surface asphalt will deteriorate or burn. Also, the traveling vehicle body 11
By providing the burner section 12 at one location on the top, it is possible to use various types of fuel.

Furthermore, the road surface is heated by the convection heat transfer of the combustion gas within the skirt portion 13, and the combustion gas heats the metal rotary carificer 17 with a large surface area, so heating is easy. Since the asphalt is heated by thermal conduction, the heating efficiency is extremely high.
Furthermore, the combustion gas is supplied from the burner section 12 to the road surface to heat the road, and then circulated by the exhaust fan 16, increasing the fuel efficiency. Due to forced circulation, the pressure in the skirt portion 13 is close to atmospheric pressure, so even if the sealing of the skirt portion 13 is insufficient, the amount of combustion gas leaking is small.

[Brief explanation of drawings]

Figure 1 is a plan view of a conventional road heating device;
3 is a plan view of the burner unit, FIG. 4 is a side view thereof, FIG. 5 is a side view showing an embodiment of the road heating device according to the present invention, and FIG. 6 is a side view of the burner unit. FIG. 2 is a partially cutaway plan view. 11... Traveling vehicle body, 12... Burner section, 13...
...Skirt part, 17...Rotary california.

Claims (1)

[Claims] 1. A burner section disposed on the upper part of the vehicle body and one end of the skirt section disposed on the lower part of the vehicle body are connected by a combustion gas supply duct, and the other end of the skirt section and the burner section are connected. 1. A road heating device, characterized in that the device is connected to an exhaust duct with an exhaust fan installed therein, and a metal member such as a rotary calffire, a groover, etc. that comes into contact with an asphalt road surface is mounted inside the skirt portion.