JPS62117287A - Attachment of heating unit to structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for attaching a heating element to a structure, which is used for removing snow that is attached to or accumulated on a structure.

<Prior art> Conventionally, in order to prevent snow from accreting or accumulating on structures such as power transmission towers, resistance-type heating wires or self-temperature-regulating heating wires have been used. i-like.

<Problems to be Solved by the Invention> However, with this method, a large amount of heat is radiated into the hollow space, a large amount of electric power is required to melt the snow, and the power loss is extremely large.

For this reason, currently, for example, methods are being used to reduce power loss by adjusting the position of heat-generating wires to structures (Japanese Unexamined Patent Publication No.
9-146180), or a method of reducing power loss by providing a heat insulating layer on a part of the covering structure of the heating wire and using this heating wire (Japanese Patent Laid-Open No. 51-219888)
Although such methods have been proposed, they are still not sufficient, and a more efficient method is desired.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide an attachment method that enables efficient use of a heating element in melting snow on a structure such as a steel tower.

<Means and effects for solving the problems> The gist of the present invention is to generate heat in the recess of a molded body made of a heat insulating material that can be closely attached to a structure and has a recess into which a heating element is fitted. The method includes fitting the molded bodies, and then arranging a heat radiating member so as to cover at least a surface portion of the molded body so as to be in contact with the heat generating body, and fixing the heat radiating member to the structure.

In other words, in the method of the present invention, the heating element is not attached directly to the structure, but is attached via a molded body made of heat insulating material.
Another method is to install a heat dissipating member on the surface.

With this structure, the heat supplied from the heating element is mainly transmitted to the snow accretion side through the metal heat dissipation member that is in direct contact with the heating element, so that good snow melting is performed and the heat is transferred to the structure side. Because heat is blocked by the molded body made of heat insulating material, not much heat is transferred, so heat loss is minimized.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

Figure 1 shows the case where the method of the present invention is applied to a section steel material,
Figure 2 shows the case where the method of the present invention is applied to L-beam steel,
FIG. 3 shows a modification of FIG. 2, and FIG. 4 shows a case where the method of the present invention is applied to a steel pipe.

The above-mentioned I-beam steel, L-beam steel, steel pipes, etc. are structures 1 that form structural members such as power transmission line towers, etc., and their side surfaces, top surfaces (front surfaces), or bottom surfaces (back surfaces) are such that they are in close contact with each surface. For example, glass wool, rock wool, calcium silicate, perlite, foam plus rubber, hard material, etc. - A molded body 2 made of a heat insulating material such as soft polyurethane is arranged. When this molded body 2 is placed above the structure 1, the upper side preferably has a curved surface such as a semicircle so as to obtain a lightning effect.

In the recess 2a of this molded body 2, a heating element 3, for example,
A resistance wire with an insulating layer and a self-temperature-adjusting heater (structured to pass electricity through a conductive resin) are fitted so that a portion of the surface thereof is exposed. The number of heating elements 3 at this time is appropriately selected as one or several depending on the required amount of heat generation, and therefore, the number of recesses 2a may be formed in accordance with the number of heating elements 3.

Further, on the surface of this heating element 3, a heat radiating member 4 made of a thin metal plate is provided. The heat dissipating member 4 does not need to cover the entire surface of the forming body 2 as in the illustrated case, and its size may be determined depending on the state of snow melting. However, if the structure is configured to cover the entire structure as shown in the figure, it is easier and more convenient to install it if it is assembled in advance so that it fits with the structure 1 side, and it also reduces heat to the structure 1 side. A conduction effect can also be obtained.

As the metal of the heat dissipation member 4, a galvanized steel plate, a galvanized steel plate, a colored iron plate, a stainless steel plate, an iron plate, etc. can be considered. In this case, in addition to heat conduction, it is also necessary to consider corrosion issues. The thickness may be approximately 1.5 mm in order to obtain the necessary strength without increasing the heat capacity of the metal plate itself.

The present snow melting device configured in this manner may be fixed to the structure 1 such as the steel tower using an adhesive or a binding wire.

In the mounting method of the present invention, the surface portion of the molded body 2 made of heat insulating material corresponding to the snow melting portion may be a flat surface, but as described above, it is preferably a curved surface such as a semicircle. The snow melting effect will be more effective if the location is selected depending on the snow accumulation situation.

In the method of the present invention, the overall shapes of the molded body 2 and the heat radiating member 4 are not particularly limited, and can be modified in various ways depending on the installation location.

<Example> Example I ■Shaped steel material (200X1
00 mm), a self-temperature-adjusting heating element (trade name: F Heater, manufactured by Igura Electric Wire Co., Ltd.) is fitted into the recesses of a heat insulating material made of urethane foam having two recesses, and a A heat dissipation member made of a tin-plated steel plate with a thickness of 5 mm was provided, and a sample as shown in FIG. 1 was prepared.
This was placed in a cold room (-10° C., wind speed 2 m/m1n), and the surface temperature and output (wattage) at four locations (floors 1 to 4) shown in FIG. 1 were measured.

As a comparative example, two of the self-temperature-regulating heating elements described above,
It was directly fixed to the side surface (inner surface) of a shaped steel material, and the surface temperature and output (wattage) were measured at the same position as in Example 1 above.

These results were as shown in Table 1 below.

As is clear from these results, in the method of the present invention, the output is less than half of that of the comparative example, and the surface temperature is sufficient to prevent snow accumulation.

Example 2 A heating element was attached to a straight-shaped steel material (L-shaped steel material: 200 x 200 mm) defined in JIS-03192 as shown in FIG. 4 above. In other words, a self-temperature-regulating heating element (trade name:
Two F heaters (manufactured by Ukkura Electric Wire Co., Ltd.) were combined, and the whole was covered with a semicircular heat dissipation member made of a silver-plated steel plate with a thickness of 0.5 mm. This was placed in a cold room (-10'C1 wind speed 2m/m1n) and placed at four locations (
The surface temperature and output (wattage) of fish 1 to 4) were measured.

As a comparative example, the heating element described above was directly fixed to a continuous parallel steel member (L-shaped steel member), and the surface temperature and output (wattage) were measured at the same position as in Example 2 above.

These results are as shown in Table 2 below, and the same results as in Example 1 above were obtained.

From this, it can be seen that the method of the present invention can sufficiently prevent snow accumulation.

<Effects of the Invention> As explained above, according to the present invention, the heating element is provided by fitting into a molded body made of a heat insulating material.
It can be used in any shape, and the heat generated is transmitted by the heat radiating member that is in direct contact with the heating element through the exposed part of the molded body, so there is no heat radiation loss to the hollow space. This results in extremely low and extremely effective snow melting.

Therefore, it is possible to significantly reduce power consumption.

Further, if the surface of the heat dissipating member is made into a convex curved surface, the lightning effect can be obtained also from the shape aspect. Moreover, since the molded body is molded so that it can be closely fixed to a structure, work during laying and construction can be easily performed.

Further, since the heat insulating material of the molded body suppresses unnecessary heat transfer to the structure side, a reduction in power consumption is achieved from this aspect as well.

[Brief explanation of drawings]

Figures 1 to 4 are schematic diagrams showing the method of attaching the heating element to a structure according to the present invention. In this case, Figure 3 shows the second
In the case of the modified example shown in the figure, FIG. 4 shows the case where it is applied to a steel pipe. In the figure, ■... Structure, 2... Molded body, 3... Heat generating element, 4... Heat dissipation member, Patent applicant Fujikura Electric Wire Co., Ltd. Figure 1, Figure 4, Figure 3,

Claims (2)

[Claims] (1) A heating element is fitted into the recess of a molded body made of a heat insulating material that can be closely attached to a structure and has a recess into which the heating element is fitted, so that at least a portion thereof is exposed, and then the heating element is brought into contact with the heating element. A method for attaching a heat generating element to a structure, comprising arranging a heat dissipating member so as to cover at least a surface portion of the molded body, and fixing the heat dissipating member to the structure. (2) A method for attaching a heating element to a structure according to claim 1, wherein the heating element is a self-temperature-adjusting heating element.