JP2019026892A - Electric rust preventing device for power transmission steel tower and electric rust preventing method for power transmission steel tower - Google Patents

Abstract

To provide an electric rust preventing device for power transmission steel tower and an electric rust preventing method for power transmission steel tower capable of being easily installed and having no adverse effect on strength balance of whole power transmission steel tower.SOLUTION: Normally an insulation coating is coated on a power transmission steel tower 2 and an insulation coated film is formed, but the insulation coated film is degraded with time and rain water soaks into a crack when crack is generated. On the other hand, rain water during raining electrifies between an anode 3 and the power transmission steel tower 2 at a recess 13 and conducts, and current flows between the anode 3 and the power transmission steel tower 2. By current flows between the power transmission steel tower 2 and the anode 3, reverse electric reaction is achieved in the case that the power transmission steel tower 2 is corroded (oxidized) and corrosion of the power transmission steel tower 2 is prevented. Power is also fed to the anode 3 itself from a battery 5 via a lead wire 14, and it is not happen that it is consumed earlier as a mere sacrificial anode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric rust prevention apparatus for a power transmission tower and an electric rust prevention method for a power transmission tower for preventing corrosion of the power transmission tower.

Electrorust prevention techniques such as anode rust prevention and cathode rust prevention, that is, anticorrosion, are known, and are used in structures such as buildings, ships, pipelines, and storage tanks.
The anode rust prevention method uses the potential difference of the metal without using a power source, and causes electricity by attaching different metals (such as aluminum alloys) to the rust prevention object, replenishing the electrons and rust prevention effect At this time, one metal is consumed by depriving of electrons, so it is also called a sacrificial anode method.

By the way, as a method for preventing corrosion of a steel tower that has deteriorated over time, a coating anticorrosion method using rust-proof coating is generally employed. When this coating anticorrosion method is adopted, if cracks occur in the coating film due to deterioration over time, water will enter the cracks and corrosion cannot be prevented. Therefore, coating by coating is repeated every certain period. There is a need. Since the cost for coating by painting is enormous, it is important to take measures to extend the period of repeated coating by coating in order to save this cost.
As a countermeasure, the use of the above-described anode rust prevention method can be considered. The anode rust prevention method prevents corrosion of the base material by causing an electric current to flow between the base material and the electrode for cathodic protection provided on the coating film when the coating film deteriorates and cracks or peels off. It is.

  In a healthy state of the coating film, the current path is cut by the insulating coating film, and current hardly flows between the tower base material and the electrode for cathodic protection. When a coating film deteriorates and a crack or the like occurs in the coating film, water enters the crack and a water film is formed, and an electric current flows between the steel tower base and the electrode for anticorrosion through the water film. . In the energized state, the steel tower base material is connected to the cathode electrode, and the reverse electrical reaction when the steel tower base material corrodes is realized, and corrosion is prevented.

  Regarding this anode rust prevention method, Patent Document 1 discloses an electric rust prevention device for a power transmission tower in which an insulating coating film and a conductive coating film are formed on a steel tower base material, and are attached to the conductive coating film. And an electrode contact surface is provided at a position protruding from the resin block, a lead wire passing through the resin block is connected to the electrode, and an adhesive for adhering the conductive coating around the contact surface is provided. An electrode for cathodic protection in which a step to be filled is formed has been disclosed.

  Patent Document 2 discloses a solar system electronic rust preventive device provided with a solar cell. This electronic rust prevention device is an electronic device that applies electrical rust prevention technology such as anode rust prevention method and cathode rust prevention method for rust prevention treatment for buildings, ships, pipelines, storage tanks, steel towers, etc. that are constructed of metal. It is a rust prevention technique, and uses a solar cell as a power source for this electronic rust prevention method.

JP 2013-108142 A Japanese Utility Model Publication No. 5-14160

The electrode for anticorrosion of Patent Document 1 is expected to affect the strength of the steel tower depending on the position attached to the steel tower. Therefore, examination and long-term tests are required to prevent adverse effects. There is no. Further, the power source for energizing the electrode is not particularly clarified, and even if it is not a simple sacrificial anode method, it is necessary to consider a power source for preventing the electrode from being consumed at an early stage.
Although it has been clarified that the solar system electronic rust preventive device of Patent Document 2 uses a solar cell as a power source, it is not clarified how to attach this to a steel tower.

  The present invention provides an electric rust prevention device for a power transmission tower and an electric rust prevention method for a power transmission tower that can be easily installed and do not adversely affect the strength balance of the entire power transmission tower in view of the above-described problems of the prior art. With the goal.

That is, the electric rust prevention device for a power transmission tower according to the present invention is an electric rust prevention device for a power transmission tower having an electric rust prevention anode attached to the power transmission tower. The electric rust prevention anode is connected to the power transmission tower by a step bolt for raising and lowering the power transmission tower. It is characterized by being fixed.
Further, the electric rust prevention method for a power transmission tower of the present invention is the above-described electric rust prevention method for a power transmission tower in which an electric rust prevention anode is attached to the power transmission tower and the electric rust prevention anode is fed by a battery stored by a solar panel. The electric rust preventive anode is fixed to the transmission tower with a step bolt for raising and lowering the transmission tower.

  According to the electric rust prevention apparatus for a power transmission tower and the electric rust prevention method for a power transmission tower of the present invention, it can be easily installed and does not adversely affect the strength balance of the entire power transmission tower.

It is a schematic diagram of the electric rust prevention apparatus for power transmission towers of one embodiment of this invention. It is a partial expanded sectional view of the electric rust prevention apparatus for power transmission towers of one embodiment of this invention. It is the (a) front view and (b) side view of the electrorust prevention apparatus for power transmission towers of one embodiment of this invention. . It is (a) explanatory drawing of the components used for the electric rust prevention apparatus for power transmission towers of one embodiment of this invention, (b) Other explanatory drawing, (c) Another explanatory drawing.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
An electric rust prevention device 1 for a power transmission tower according to the present embodiment shown in FIG. 1 includes an electric rust prevention anode 3 mounted on a power transmission tower 2 which is an angle steel tower made of, for example, isosake mountain steel, and an anode anticorrosion controller. 4a and a battery 5 which is a lithium ion battery for supplying power via the charge output controller 4b, and a solar panel 6 which stores electricity in the battery 5 via the charge output controller 4b.

  As shown in FIG. 2, the plate-shaped aluminum alloy electrorust-preventing anode 3 is fixed to the power transmission tower 2 by means of a transmission tower lifting step bolt 8 and nuts 9a, 9b. The anode 3 and the transmission tower raising / lowering step bolt 8 are insulated by an insulating sleeve 10. The anode 3 and the power transmission tower 2 are insulated by a polytetrafluoroethylene insulator 11.

The insulating sleeve 10 is formed in a cylindrical shape having a flange portion 10a formed at one end, and the inner diameter of the cylindrical portion 10b can be fitted with a step bolt 8 for raising and lowering a power transmission tower.
A series of through holes are formed in each of the power transmission tower 2, the anode 3, and the polytetrafluoroethylene insulator 11, and the insulating sleeve 10 is inserted into the through holes and fitted inside the insulating sleeve 10. A transmission tower elevating / lowering step bolt 8 is attached and fastened to the nuts 9a and 9b.
In this state, the side surface of the flange 10a of the insulating sleeve 10 is in contact with the side surface of the anode 3 opposite to the power transmission tower 2 and the polytetrafluoroethylene insulator 11, and further, glass is interposed between the flange portion 10a and the nut 9b. An insulating flat washer 12 of material is inserted.

In the above, the polytetrafluoroethylene insulator 11 that insulates the power transmission tower 2 and the anode 3 has an outer diameter smaller than that of the anode 3, so that the outer side of the polytetrafluoroethylene insulator 11 is interposed between the power transmission tower 2 and the anode 3. A recess 13 is formed at the position.
A lead wire 14 for supplying power from the battery 5 is attached to the anode 3 described above.
As shown in FIGS. 3A and 3B, the mounting posture of the anode 3 with respect to the power transmission tower 2 is a rhombus-shaped mounting posture in which the outer surface of the anode 3 is inclined with respect to the vertical direction. By doing so, even when sand dust, dust or the like enters the recess 13, it can be made difficult to deposit due to the flow of rainwater.

FIG. 4 shows various power transmission tower lifting / lowering step bolts 8.
FIG. 4A shows a standard step bolt 8 made of angle steel. FIG. 4B shows a special step bolt 8 for the Eboshi type steel tower. FIG. 4C shows a cross-angle step bolt 8.
Any of these can be used in the present invention, and such a transmission tower raising / lowering step bolt 8 is attached to all the transmission towers 2. There are cases where all legs are attached and only one or two legs are attached. Generally, it is attached at an interval of about 45 cm from about 1 m above the ground to the top, and since the strength of the transmission tower 2 is irrelevant, it is possible to attach accessories. Further, it is made of iron, which is the same material as the power transmission tower 2 assembly bolt (not shown), and is galvanized and has excellent durability. This transmission tower lifting / lowering step bolt 8 can be used for a thick steel tower material having a long effective bolt length and can be attached with an anode 3 having a sufficient thickness, for example, 15 mm.

  By using the transmission tower lifting / lowering step bolt 8 to attach the anode 3 to the transmission tower 2, the rust-preventing anode 3 can be attached at a regular interval of 45 cm from about 1 m above the ground to the top. Further, the strength of the power transmission tower 2 itself is not directly affected, and the strength is sufficient. Further, even if the anode 3 is attached to the step bolt 8 for raising and lowering the power transmission tower, there is no problem in raising and lowering which is the original use of the step bolt 8 for raising and lowering the power transmission tower. Further, since the existing transmission tower elevating / lowering step bolt 8 is used, it is not necessary to separately perform a drilling operation for attaching the anode 3. Further, it is easy to perform subsequent maintenance, and workability such as replacement with a new anode 3 is good.

  The power transmission tower 2 is usually coated with a rust preventive paint and an insulating coating film is formed. However, when time passes and the insulating coating film deteriorates and a crack is generated, rainwater infiltrates into the crack. On the other hand, rainwater during raining is conducted by energizing the anode 3 and the power transmission tower 2 in the recess 13, and a current flows between the anode 3 and the power transmission tower 2. Here, when a current flows between the power transmission tower 2 and the anode 3, a reverse electric reaction when the power transmission tower 2 is corroded (oxidized) is realized, and corrosion of the power transmission tower 2 is prevented.

  On the other hand, the anode 3 itself is also supplied with power from the battery 5 via the lead wire 14 and is not consumed quickly as a mere sacrificial anode. In addition, the battery 5 is always charged by the solar panel 6 in fine weather, and it is not necessary to prepare an external power source for that purpose.

In the present embodiment, an aluminum alloy is used as the anode 3 and the aluminum alloy anode 3 is used. However, the present invention is not limited to this, and the anode 3 may be zinc, carbon, titanium alloy, boron alloy, or the like.

2 ... Power transmission tower, 7 ... Anode, recess 13, 8 ... Step bolts for lifting the power transmission tower.

Claims (6)

  An electric rust prevention device for a power transmission tower having an electric rust prevention anode attached to the power transmission tower, wherein the electric rust prevention anode is fixed to the power transmission tower by a step bolt for raising and lowering the power transmission tower. Electric rust prevention device.   An electric rust prevention apparatus for a power transmission tower, comprising: a battery for supplying power to the electric rust prevention anode; and a solar panel for storing electricity in the battery.   The electric rust prevention apparatus for power transmission towers according to claim 1, wherein an insulation sleeve is used to insulate the electric rust prevention anode and the transmission tower raising / lowering step bolts, and an insulation between the anode and the power transmission tower is provided by an insulator made of polytetrafluoroethylene.   The electric rust prevention device for a power transmission tower according to claim 3, wherein the polytetrafluoroethylene insulator for insulating the power transmission tower and the anode has an outer diameter smaller than that of the anode.   The electric rust prevention apparatus for power transmission towers according to any one of claims 1 to 4, wherein the mounting posture of the anode with respect to the power transmission tower is a mounting posture in which the outer surface of the anode is inclined with respect to the vertical direction.   In the electric rust prevention method for a power transmission tower in which an electric rust prevention anode is mounted on a power transmission tower and the electric rust prevention anode is fed by a battery stored by a solar panel, the electric rust prevention anode is transmitted by a step bolt for raising and lowering the power transmission tower. An electric rust prevention method for a power transmission tower characterized by fixing to a steel tower.

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