JPH0393418A - Ice/snow anti-accretion spiral rod for wire - Google Patents

Abstract

PURPOSE:To enable repair and to simplify manufacture by applying paint, which is heated upon power supply, onto the inner face of a pipe type rod to be wound around a wire. CONSTITUTION:A heating body is laid along a wire. Preferably, an aluminum pipe 4 is employed as the basic structure of a heating spiral rod 1 applied with paint which is heated upon power supply. Insulating paint 3 is applied onto the inner face of the aluminum pipe 4 and heating paint 2 is applied thereon. Since the paint 2 is heated upon power supply, it is applied so that a power conduction path is formed. Consequently, the heating paint 2 is applied simply on the inner face of the pipe 4 or on the outer periphery of a core member. By such arrangement, manufacturing process is simplified remarkably resulting in cost reduction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an icing and snow prevention device in which a heating element is attached to an electric wire and the generated heat is used to melt and fall lightning that has formed on the electric wire. It concerns an improved spiral rod for use. [Prior Art] Icing lightning on overhead power lines does not always have a uniform appearance depending on the snow quality, wind speed, etc. In other words, if dry lightning causes snow to fall under light wind conditions, the snow will grow above the power lines. However, if the wind speed is strong and the snow is wet, the ice and snow will grow in the shape of wings in the horizontal direction of the power line, and if the outside temperature is particularly low, the wings will become frozen and stick out, causing a three-way jump. This may cause gear-ropping vibration, which may cause serious accidents such as phase-to-phase short circuits. Furthermore, even if snow falls on the ground above, depending on the quality of the snow, lightning may rotate and grow around the outer periphery of the power lines and fall as snowflakes, causing damage to structures and crops.
If the above-mentioned rotational growth becomes even larger, there is a risk that the excessive tension may cause wire breakage accidents, or in extreme cases, even cause the tower to collapse. For this reason, many proposals and attempts have been made to prevent ice and snow from accreting on power transmission lines. As shown in Figure 1O, a current transformer (preferably a split type) 10 is attached to the power transmission line 30, a heat generating spiral rod 20 is connected to the secondary coil as shown in the figure, and the heat generating spiral rod 20 is connected to the secondary coil as shown in the figure. The method of melting snow by winding the electric wire in the longitudinal direction and using the electric current generated in accordance with the number of turns of the secondary coil wound around the current transformer 10 as a source to generate heat in the heating spiral rod 20 is to As long as it can be supplied, ice lightning can be reliably melted and fallen regardless of the snow quality.Specifically, the heat generating spiral rod 20 includes the first
As shown in Fig. 1, the insulator 22 is filled in an aluminum pipe 23 and a resistance heating wire 21, 21 such as a nichrome wire is inserted through it, or as shown in Fig. 12, the sectional structure is shown in Fig. 12. In addition, an insulating material 26 is provided inside the aluminum pie 123 and the conductors 24 and 24 are passed through in parallel,
In between, a heating element (preferably a self-regulating heating element made by dispersing conductive pieces such as carbon black in a heat-resistant resin) 25 is filled, and the conductor 24 is filled with the current transformer 10. A device has been proposed in which the heating spiral rod 20 generates heat by energizing the heating spiral rod 20 as a power source. [Problem to be solved by the invention] The above-mentioned heat-generating spiral rod type is as follows:
As mentioned above, it has the great advantage of being able to prevent snow and ice formation regardless of snow quality, but it is not without its problems. First, the heating wire 21 shown in FIG.
When configured with fJ! There is little flexibility in adjusting IL and length, and it is necessary to determine a predetermined design length before manufacturing and manufacture according to that. Another problem is that if a wire breaks due to thermal stress or external force during use, it cannot be repaired, and the technology to properly accommodate the heat-generating wire inside the pipe is surprisingly difficult. Further, in the case of the configuration shown in FIG. 12, although it is possible to cut and adjust the length, even if a deteriorated part occurs during use, it cannot be repaired. The purpose of the present invention is to solve the above-mentioned problems of the conventional technology, to easily generate heat with low voltage, to freely adjust the length as necessary, and to prevent partial deterioration. The purpose of this invention is to provide a new heat-generating spiral rod for a power transmission line ice and snow prevention device that can be easily repaired or replaced in the event of a problem. [Means for Solving the Problems] The present invention is characterized in that a heat-generating paint that generates heat when energized is applied to the inner surface of a pipe-shaped rod wound around the outer periphery of an electric wire, and furthermore, the outer periphery of a core member that is visible A heat-generating paint that generates heat when energized is applied to the pipe, and this is then pushed into a protection pipe that has been formed into a spiral shape. [Function] Compared to the conventional method in which heat-generating wires or conductors are passed through aluminum pipes, manufacturing is much simpler as it is only necessary to apply heat-generating paint to the inner surface of the pipe or the outer periphery of the core member. This makes it possible to reduce the cost. Furthermore, since the amount of heat-generating paint can be adjusted according to the voltage, it can be made in any length, and if a deteriorated part occurs, it can be reapplied, making repair extremely easy and flexible. [Actual Dragon Example] The present invention will be explained below with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of the heat-generating spiral rod 1 according to the present invention, FIG. 2 is an A-Altli side view thereof, and FIG. 3 is a portion inside the P circle of one end of FIG. 1. Fig. 4 shows an enlarged longitudinal cross-sectional view of the inside of the Q circle of the other terminal. As the basic structure of the heating spiral rod 1, for example, an aluminum pipe 4 (which may be made of an aluminum alloy or other metal such as stainless steel) is suitable. An insulating paint 3 is applied to the inner surface of the aluminum vibe 4, and a heat-generating paint 2 is applied thereon. Since the heat-generating paint 2 generates heat when energized, it must be applied to the aluminum pipe 4 so that a certain current-carrying circuit is formed. For this reason, in the embodiment shown in FIG. 1, in the middle portion of the spiral rod 1, as shown in the cross-sectional view of FIG.
The heat-generating paint 2 is not applied over the entire circumference of the inner surface, but two spaced apart parts formed by a gap δ are provided extending in the longitudinal direction, and the heat-generating paint 2 is applied on the inner surface of the pipe 4 in two parts. As shown in FIG. 4, which is an enlarged vertical cross-sectional view of the inner part of the terminal Q circle in FIG. 6b is such a terminal to electrically connect between the exothermic paint 2.2, which was divided in the middle, by applying it or filling it with another conductive material and bringing it into contact. This is a terminal cap to protect the parts. In addition, at the other end of the spiral rod in FIG. 1, as shown in FIG. Also in this case, heat-generating paint electrodes 2a, 2a are formed using a conductive reinforcing member such as a copper mesh, and lead wires 71 and 72 are connected and drawn out using these as electrodes. This lead wire 7s. 7g is connected as an external power source to, for example, the aforementioned current transformer or solar cell, the spiral rod 1 has a lead wire 7s. An energizing circuit is constructed using the heat-generating paint 2 with 7g as a lead wire, thereby making it possible to generate heat in the spiral rod 1 and melt the ice and snow on the wire and cause it to fall. 6a is a lead wire 71. The specific composition of the heat-generating paint used in this way, which is a terminal cap to protect the 7g outlet, is a paint made by combining a special heat-generating element with a special inorganic material and melting it in an organic solvent. It can be applied to any shape by balding or spraying, and dries naturally in a short period of time. To apply it inside a pipe, for example, it can be applied in the form of a long plate, and then molded into a pipe with this inside. This type of heat-generating paint can be heated to 30-60℃ at a low voltage of about 12V.
It generates heat up to a high temperature of 140°C at 24V and 800°C at IOOV, making it extremely useful for preventing ice and snow from accumulating on power transmission lines. Moreover, the calorific value of the exothermic paint can be adjusted by its formulation and coating thickness. In addition, in Figs. 2 to 4, the numeral 5 applied to the entire outer peripheral surface is a far-infrared emitting paint, which is applied to double the heat-generating effect through a synergistic effect with the heat-generating paint inside. In the above embodiment, the heat-generating paint is applied directly to the inner surface of the pipe-shaped spiral rod 1, but as shown in FIGS. The heat generating rod IB may be formed by applying heat generating paint 2 to 1a, and this may be inserted and accommodated in the protective pipe IA. That is, FIG. 5 is a sketch showing another embodiment in which a separately formed heating rod IB as described above is inserted into a formed protective pipe IA that is previously formed into a spiral shape. As shown in FIG. 6, which is a cross section taken along line B-B in FIG. The core member 1a is coated with an insulating paint 3 as a base as shown in FIG. Heat-generating paint 2.2 is applied to the two-part surface of the outer periphery of the rod, and insulating paint 3 is applied thereon to form the heat-generating rod IB, and the heat-generating rod IB is placed in a protection pipe IA made of, for example, an aluminum vibrator 8 and formed in a spiral shape in advance. Insert and accommodate as shown in the figure. FIG. 7 is a cross-sectional view taken along line C-C, which is the terminal portion of FIG.
At this terminal part, the insulating paint 2 is applied to the entire circumference of the core member 1a, and the above-mentioned gap δ is filled, and the heat-generating paint 2.2 that was in the divided state is connected together so that it is electrically conductive. It will be done. In this way, the above-mentioned energizing circuit is formed, and the lead wires 71 and 72 attached as described above are connected to the power source.
In the figure, the reference numeral 5 applied to the outer circumference of the pipe 8 is the far-infrared Il-generating paint described above. FIG. 8 shows a modification of the method of attaching lead wires 71 and 72 according to the present invention, in which one lead wire 71 is connected to one end of the spiral rod, and the other lead wire 72 is connected to the eighth end of the spiral rod. As shown in FIG. 9, which is a sectional view taken along line D-D in the figure, an example is shown in which the spiral rod 1 is extended to the opposite end and connected to the heat-generating paint at the opposite end. In this way, the exothermic paint 2 can be applied to the inner surface of the pipe or the outer circumferential surface of the core member to form a current-carrying circuit through the extended lead wire 72 even when it is applied all around without dividing it into two parts. This has the advantage of making it easier and simpler to apply the heat-generating paint. In FIG. 8, numeral 9 is a temperature switch, which is arranged so that it operates only at low temperatures that would cause snow or ice to occur, so as not to cause unnecessary operation at high temperatures. Although this temperature switch is omitted in the previous two examples, it is effective in extending the life of the spiral rod by preventing wasteful heat generation in unnecessary seasons, and such a switch or It is desirable to install an equivalent element. In addition, 10 in FIG. 8 is the current transformer already explained. The above-mentioned protective pipe IA is not limited to metal and may be made of non-metal, and the same applies to the material of the pipe-shaped rod illustrated in FIGS. 1 to 4. Further, the terminal electrodes are not limited to the exemplified cylindrical material, and silver paste, copper tape, copper mesh tape, etc. may also be used. [Effects of the Invention 1 As described above, the spiral rod for preventing icing and lightning according to the present invention can exhibit the following excellent effects. (1) Since the heating element can be created by applying paint, it is not only economical but also easy to repair. (2) The required calorific value can be obtained by changing the coating thickness and paint composition, and it has excellent industrial properties. (3) Since the ripening body is arranged inside the bin 1, there is no risk of damage from the outside. (4) When used on power transmission lines, there is less need to expect an increase in weight like with other heating elements. (5)! In addition to the effect of preventing ice and snow, it also has the effect of preventing wind noise.

[Brief explanation of drawings]

FIG. 1 is a sketch of an embodiment according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG.
The sectional view and Figure 4 are the same. A vertical sectional view of the inner part of the circle, FIG. 5 is a sketch of another embodiment, FIG. 6 is a BB sectional view of FIG. 5, FIG. 7 is a sectional view of the same <CC, and FIG. 8 is a lead. A sketch showing another embodiment of the wire attachment method, FIG. 9 is a D-D sectional view of FIG. FIG. 12 is an explanatory cross-sectional view showing one configuration of a conventional Yunju spiral rod, and FIG. 12 is an explanatory cross-sectional view showing another example of the structure of the conventional heat-generating spiral rod. 1: Heat-generating spiral rod, IA: Molded protection pipe, 1B: Inserted heat-generating rod, 1a: Core member, 2: Heat-generating paint, 2a: Heat-generating paint Th pole, 2b = Heat-generating paint terminal connection part, 3: Insulating paint 4: Aluminum Pipe, 5: Far-infrared emitting paint, 6a. 6b: Terminal cap, 71.72: Lead wire, 8: Aluminum pipe section, 9: Temperature switch. 10: Current transformer, 30: Th line.

Claims (2)

[Claims] (1) A spiral rod for preventing ice and snow from accumulating on electric wires, which is made by applying a heat-generating paint that generates heat when energized to the inner surface of a pipe-shaped rod that is wound around the outer circumference of the electric wires. (2) A spiral rod for preventing icing and snow from accumulating on electric wires, which is made by coating the outer periphery of a flexible core member with a heat-generating paint that generates heat when energized, and inserting and storing this into a spirally formed protection pipe.