JP2716043B2 - Road surface heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a heater for heating, for example, a road surface of asphalt pavement.

(Related Art) In the case of regenerating an asphalt-paved road or the like on the road, a heater is used to heat the asphalt-paved road surface. As such a heater, a gas heater as shown in FIG. 2, a kerosene heater as shown in FIGS. 3 and 4, and the like have been conventionally used.

The gas heater shown in FIG. 2 has a flow guide plate 1 at its longitudinal end.
A combustion net 4 and a radiant net 5 each having a stainless steel mesh layered in multiple layers are sequentially attached to the lower surface of the inverted dish-shaped container body 2 provided with The combustion gas supply pipe 6 is connected, the combustion gas 4 and the radiation network 5 are glowed by the combustion gas, and the asphalt pavement surface is heated by the radiation heat.

In the kerosene heater shown in FIGS. 3 and 4, a heat insulating material 13 is arranged on one side of a metal frame 12 serving as a heat ray reflection plate to form a shallow box-shaped container 14, and the frame 12 A wind skirt 15 is attached at an interval outside of the radiator, and six reflectors 16 are arranged in parallel on the heat insulating material 13, and a number of combustion gas emission holes 17 are formed on each reflector 16. In addition to the arrangement of the cylinders 18, the combustion gas 20 of the kerosene burner 19 is injected from one end of each of the infrared radiation cylinders 18.
And the radiant heat is used to heat the asphalt pavement surface.

(Problems to be Solved by the Invention) However, in such a conventional road surface heating heater, the heat radiation rate of the metal constituting the radiation network 5 or the infrared radiation tube 18 is low, and the heat loss is large. Therefore, it is difficult to efficiently heat the fuel, and reducing fuel consumption and working time has been a major issue.

In order to solve such difficulties, it has been considered to improve the heating efficiency by forming a heat radiation coating on the surface of a radiation net or an infrared radiation tube by ceramic spraying or baking of a silicone paint.

However, of these methods, the method of forming a thermal radiation coating by ceramic spraying is not only costly but also difficult to form a coating on the surface of a radiation network or an infrared radiation tube, and baking a silicone-based paint. In the method of forming a coating by heat, there is a problem that it cannot be used for a part heated to a high temperature such as a heat radiation part of a road surface heater because the heat resistance of the coating is insufficient.

The present invention has been made in order to solve these problems, and provides an infrared radiation type road surface heater capable of forming a heat radiation coating easily, having high heat resistance, and efficiently heating asphalt pavement. The purpose is to do.

[Constitution of the Invention] (Means for Solving the Problems) In a heater for heating a road surface according to the present invention, a polyborosiloxane resin, a polysilastyrene resin, a polysilazane resin, a polytitanocarbosilane resin and a polycarbosiloxane are provided in a heat radiation portion. A heat radiation coating is formed by applying and baking a heat-resistant paint containing at least one type of organosilicon polymer selected from silane resins as a main component.

As a material constituting the heat radiation portion of the road surface heater of the present invention, a cylinder, a plate, or a net made of metal such as iron surface-treated steel and stainless steel is used.

The heat-resistant paint applied to these surfaces is at least one selected from the above-mentioned organic polymers having a silicon skeleton such as polyborosiloxane, polycarbosilane, polysilastyrene, polysilazane, and polytitanocarbosilane. Paints based on some organosilicon polymers are used.

These heat-resistant paints include 100 parts by weight of at least one polymer selected from organic polymers having a non-carbon skeleton such as polyborosiloxane, polycarbosilane, polysilastyrene, polysilazane, and polytitanocarbosilane. Around, titanium oxide and zirconium silicate and
By mixing 10 to 300 parts by weight of a composite oxide of Mn, Fe, and Cu, heat radiation characteristics can be improved.

If the amount of these fillers exceeds 300 parts by weight per 100 parts by weight of the polymer, a film having good adhesion is not formed, which is not preferable. Further, an appropriate amount of a silicone resin (polysiloxane) can be added to these heat-resistant paints if necessary.

In the present invention, such a heat-resistant paint is applied to the surface of a heat radiating portion such as a wire mesh or a metal plate of a heating heater of a gas combustion type or a kerosene type such as a road surface regeneration machine, a road surface cutting machine, a joint heater or a portable heater. And sintering by a conventional method to form a film having high heat radiation.

(Function) In the heater for heating a road surface of the present invention, a heat radiation coating formed by baking a heat-resistant paint is provided on the surface of a wire mesh, a metal plate, or the like. And asphalt pavement can be efficiently heated.

Further, the formation of the heat radiation coating is easy and the production cost is not so high.

(Examples) Hereinafter, examples of the present invention will be described.

Examples 1 to 3 An N-methyl-2-pyrrolidone solution of an organic polymer shown in the following table and a filler were blended at a ratio (% by weight) shown in the same table, and these were stirred and mixed with an attritor for 10 hours.

Next, the obtained paint is applied to the surface of the radiation network 5 of the gas heater shown in FIG. 2 and then baked at 450 ° C. for 10 minutes to form a 20 μm thick heat radiation coating 7 as shown in FIG. Formed.

For comparison, as shown in the table, a heat-resistant paint containing a large amount of a filler for heat radiation was applied to the surface of the combustion net and fired in the same manner as in the examples to form films (Comparative Examples 1 to 5).
2).

Next, with respect to the gas heater for road surface heating obtained in Examples and Comparative Examples 1 and 2 and the gas heater for road surface heating before forming a thermal radiation coating on the radiation net (Comparative Example 3), the heating property for asphalt pavement and Adhesion and heat shock were each tested.

The heatability test was performed by fixing the gas heater for road surface heating of the example and the comparative example on the asphalt pavement surface, heating the combustion net with the combustion gas, and measuring the temperature in the asphalt with the embedded thermocouple. .

In the adhesion test of the film, a cellophane tape was stuck to the surface of the film and adhered well, then the tape was peeled off at a stretch to observe the peeling of the film.In the heat shock test, a heat cycle of 800 ° C x 10 minutes at room temperature was performed. Was repeated 30 times, and the appearance of the coating was visually observed.

 These test results are shown in the lower column of the table.

In the above embodiment, an example in which the present invention is applied to a conventional gas heater is described. However, a similar effect is obtained when the present invention is applied to a kerosene heater.

[Effects of the Invention] As is clear from the above embodiments, in the road surface heater of the present invention, a heat radiation coating is formed on the surface of a wire mesh or a metal plate that generates radiant heat by firing a heat-resistant paint. As a result, the heat radiation is high and the asphalt pavement can be efficiently heated. Further, the formation of the coating is easy and the production cost is low. Furthermore, the film has excellent adhesion and heat resistance, and does not peel off even after repeated heat cycles.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a heat radiation portion of a road surface heater according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a conventional road surface heating gas heater, and FIG. FIG. 4 is a plan view of the kerosene heater, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 2 ... vessel 4 ... combustion network 5 ... radiation network 6 ... combustion gas supply pipe 7 ... thermal radiation coating 12 ... frame 13 ... thermal insulation 14 ... vessel 15 ... windproof skirt 16 ... … Reflector 17… Combustion gas discharge hole 18… Infrared radiation tube 19… Kerosene burner

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Hashimoto 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Showa Denden ▲ Ran ▼ Co., Ltd. (72) Inventor Kazuhiro Tomita Kawasaki-ku, Kawasaki-shi, Kanagawa (1-1) Osamu Oda 2-1-1 Showa Electric Railway Denran Co., Ltd. (72) Inventor Kako Sakamoto 2-1-1 Odaei Odaei Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Harmony

Claims (2)

(57) [Claims] 1. The heat radiation part mainly contains at least one kind of organosilicon polymer selected from polyborosiloxane resin, polysilastyrene resin, polysilazane resin, polytitanocarbosilane resin and polycarbosilane resin. A heater for heating a road surface, comprising a heat radiation coating formed by applying a heat-resistant paint and firing. 2. The heat radiation portion is provided with (a) 100% by weight of at least one kind of organosilicon polymer selected from a polyborosiloxane resin, a polysilastyrene resin, a polysilazane resin, a polytitanocarbosilane resin and a polycarbosilane resin. In the part, (ii) titanium oxide and zirconium silicate and M
A heater for heating a road surface, comprising a heat radiating portion coating formed by applying and baking a heat-resistant paint containing 10 to 300 parts by weight of a composite oxide of n, Fe and Cu.