JPH09253876A - Method for removing rust of metallic equipment of out door installation - Google Patents

Method for removing rust of metallic equipment of out door installation

Info

Publication number
JPH09253876A
JPH09253876A JP7235096A JP7235096A JPH09253876A JP H09253876 A JPH09253876 A JP H09253876A JP 7235096 A JP7235096 A JP 7235096A JP 7235096 A JP7235096 A JP 7235096A JP H09253876 A JPH09253876 A JP H09253876A
Authority
JP
Japan
Prior art keywords
rust
laser beam
metal
laser light
less
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7235096A
Other languages
Japanese (ja)
Other versions
JP3306291B2 (en
Inventor
Shuichi Ashitachi
修一 蘆立
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Power Co Inc filed Critical Tokyo Electric Power Co Inc
Priority to JP7235096A priority Critical patent/JP3306291B2/en
Publication of JPH09253876A publication Critical patent/JPH09253876A/en
Application granted granted Critical
Publication of JP3306291B2 publication Critical patent/JP3306291B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laser Beam Processing (AREA)
  • Electric Cable Installation (AREA)

Abstract

PROBLEM TO BE SOLVED: To remarkably improve the working efficiency of the high lift work by guiding the laser beam of the specified wavelength by an optical fiber, and irradiating the laser beam on a surface of a rusted part to easily remove the rust. SOLUTION: In removing the rust on a transmission line steel tower 10, a working vehicle 12 is arranged in the vicinity of the transmission line steel tower 10. A solid laser beam generator 14 is mounted together with a power unit or the like on the working vehicle 12, and an optical fiber 16 is connected to the laser beam generator 14. The laser beam L is emitted from a tip of the optical fiber 16 by driving the laser beam generator 14, and a surface of the transmission line steel tower 10 is irradiated therewith. A reflection factor measuring device 18 is installed corresponding to the irradiation position of the laser beam L to measure the reflection factor at the place irradiated with the laser beam L by the measuring device 18. When the surface of the transmission line steel tower 10 in which the rustproof treatment such as coating and plating is performed on the surface of a base metal is irradiated with the laser beam L, more optical energy is absorbed by the rusted part from the difference in the reflection factor between the rusted part and the base metal, and the rust is turned into small broken pieces, and selectively removed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、送電線鉄塔など
の屋外設置型の金属製設備の錆の除去方法に関し、特
に、レーザ光を用いる金属製設備の錆の除去方法に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of removing rust from outdoor installation type metal equipment such as a transmission line tower, and more particularly to a method of removing rust from metal equipment using laser light.

【0002】[0002]

【従来の技術と発明が解決しようとする課題】送電線用
鉄塔など屋外に設置されている金属製設備は、厳しい環
境条件下に晒されるため、母材鋼板の表面に防錆のため
の溶融亜鉛メッキが施されており、また、必要な場合に
は、航空障害標識などの塗装も施されている。ところ
が、このようなメッキや塗装が経年変化により劣化した
場合は、塗装ないしは再塗装作業が必要になる。
2. Description of the Related Art Metal equipment installed outdoors, such as steel towers for power lines, is exposed to severe environmental conditions. It is galvanized and, if necessary, painted with aviation obstruction signs. However, if such plating or coating deteriorates due to aging, painting or repainting work is required.

【0003】このような塗装ないしは再塗装を施す際に
は、溶融亜鉛メッキの表面に発生した錆および残存する
塗装の除去をいかに的確に行なうかが、再塗装時期の延
命化に極めて重要な影響を与える。ところが、現状にお
いては、錆および塗装の除去は、ケレン作業と呼ばれ
て、金ブラシなどで人手により行なわれている。しかし
ながら、このような除去方法では、手間がかかる上に、
錆や残存塗装を完全に除去することが困難であった。
When performing such coating or repainting, how to properly remove the rust generated on the surface of the hot-dip galvanizing and the remaining paint has a very important influence on extending the life of the repainting. give. However, in the present situation, the removal of rust and paint is called a shaving operation and is performed manually with a gold brush or the like. However, such a removal method is troublesome and
It was difficult to completely remove rust and residual paint.

【0004】また、鉄塔の鋼板が錯綜した部分には、金
ブラシなどが挿入しにくく、このような部分の錆や残存
塗装が簡単に除去できる方法の実現が強く要請されてい
た。このような要請に応える塗装の除去方法として、例
えば、米国特許第4756765号には、レーザ光を照
射して塗装を除去する方法が提案されており、近時、こ
れを実現するための装置も市販されている。
Further, it is difficult to insert a gold brush or the like into the complex portion of the steel plate of the steel tower, and there has been a strong demand for the realization of a method capable of easily removing rust and residual coating on such a portion. As a method of removing the coating that meets such a request, for example, US Pat. No. 4,756,765 proposes a method of removing the coating by irradiating a laser beam, and recently, an apparatus for realizing this has been proposed. It is commercially available.

【0005】ところが、米国特許で提案されている塗装
の除去方法は、レーザ光の光源にパルス動作の炭酸ガス
レーザーを用い、航空機などの除去対象物を屋内に持ち
込んで、塗装を除去する方法である。しかし、このよう
な除去方法を屋外設置型の金属製設備に適用しようとす
ると、炭酸ガスレーザーのエネルギー伝送が、光ファイ
バで行なえないので、例えば、屋外に設置されている送
電線鉄塔の塗装除去に適用することができなかった。
However, the coating removal method proposed in the US patent is a method of removing a coating by using a pulsed carbon dioxide gas laser as a laser light source and bringing an object to be removed such as an aircraft indoors. is there. However, if such a removal method is applied to outdoor installation type metal equipment, the energy transfer of the carbon dioxide gas laser cannot be performed by the optical fiber, so, for example, paint removal of a transmission line tower installed outdoors. Could not be applied to.

【0006】本発明は、このような問題点に鑑みてなさ
れたものであって、その目的とするところは、屋外に設
置されている金属製設備の錆が簡単に除去できる方法を
提供することにある。
The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for easily removing rust from metal equipment installed outdoors. It is in.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、屋外に設置され、金属母材の表面に塗装
やメッキなどの防錆処理が施された金属製設備の錆の除
去方法において、前記金属製設備に錆が発生した際に、
当該金属製設備の表面に光ファイバを介して所定波長の
レーザ光を照射するようにした。レーザ光を金属母材面
に塗装やメッキなどの防錆処理が施された金属製設備の
表面に照射すると、錆の発生部分と金属母材との反射率
の相違から、錆の発生部分により多くの光エネルギーが
吸収され、錆が微細破片となって、選択的に除去され
る。この場合、レーザ光は、光ファイバでエネルギー伝
送が可能なものであればよく、例えば、波長が1.06
4μmのネオジウム・ヤグ(Nd:YAG)固体レーザ
を使用することができる。このとき、レーザ光は、金ブ
ラシの挿入が困難な狭隘な場所でも簡単に照射すること
ができ、このような部分に発生した錆を確実に除去する
ことができる。本発明が適用される金属製設備として
は、送電線鉄塔,火力発電所内煙突,変電所内鉄塔,配
電柱の腕金および変電器受け台などの電力設備を挙げる
ことができる。前記レーザ光の照射は、前記金属製設備
の表面の反射率を測定しながら行なうことができる。こ
のような方法を採用すると、リアルタイムで錆の除去対
象物の反射率が判り、測定された反射率から錆が的確に
除去されていることを確認することができる。また、前
記金属製設備の除去対象が赤錆であって、この赤錆を除
去する際に、前記レーザ光を約10ns程度の短パルス
で照射する時に、そのエネルギー密度を0.4ジュール
/cm2 以下で、0.28ジュール/cm2 以上に設定
することができる。さらに、前記金属製設備の除去対象
が赤錆であって、この赤錆を除去する際に、前記レーザ
光を約200ns程度の長パルスで照射する時に、その
エネルギー密度を3.0ジュール/cm2 以下で、1.
1ジュール/cm2 以上に設定することができる。さら
にまた、前記金属製設備の除去対象が白錆であって、こ
の白錆を除去する際に、前記レーザ光を約200ns程
度の長パルスで照射する時に、そのエネルギー密度を
3.0ジュール/cm2 以下で、1.0ジュール/cm
2 以上に設定することができる。このように、レーザ光
のエネルギーの大きさを錆の種類およびパルス幅に対応
して設定すると、金属母材に損傷を与えることなく、錆
だけを選択的に除去することができる。
In order to achieve the above object, the present invention provides a method for removing rust in a metal facility installed outdoors and having a metal base material subjected to anticorrosion treatment such as painting or plating on the surface thereof. In the removal method, when rust occurs in the metal equipment,
The surface of the metal equipment was irradiated with laser light of a predetermined wavelength via an optical fiber. When laser light is applied to the surface of metal equipment that has been subjected to rust prevention treatment such as painting and plating on the metal base material surface, the difference in reflectance between the rusted part and the metal base material causes A large amount of light energy is absorbed, and the rust becomes fine fragments that are selectively removed. In this case, the laser light may be any laser light that can transmit energy through an optical fiber, and has a wavelength of 1.06, for example.
A 4 μm neodymium yag (Nd: YAG) solid state laser can be used. At this time, the laser beam can be easily irradiated even in a narrow place where it is difficult to insert the gold brush, and the rust generated in such a portion can be reliably removed. Examples of metal equipment to which the present invention is applied include electric power equipment such as a transmission line tower, a chimney inside a thermal power station, a substation tower, a distribution pole arm, and a substation cradle. The irradiation of the laser beam can be performed while measuring the reflectance of the surface of the metal equipment. When such a method is adopted, the reflectance of the rust removal object can be known in real time, and it can be confirmed from the measured reflectance that rust has been removed accurately. Further, the object of removal of the metal equipment is red rust, and when removing the red rust, when the laser beam is irradiated with a short pulse of about 10 ns, the energy density thereof is 0.4 joule / cm 2 or less. Can be set to 0.28 joule / cm 2 or more. Furthermore, the removal target of the metal equipment is red rust, and when removing the red rust, when irradiating the laser beam with a long pulse of about 200 ns, the energy density thereof is 3.0 joules / cm 2 or less. Then 1.
It can be set to 1 joule / cm 2 or more. Furthermore, the removal target of the metal equipment is white rust, and when removing the white rust, when the laser beam is irradiated with a long pulse of about 200 ns, the energy density thereof is 3.0 joules / 1.0 Joule / cm at cm 2 or less
It can be set to 2 or more. As described above, when the energy level of the laser beam is set in accordance with the type of rust and the pulse width, only the rust can be selectively removed without damaging the metal base material.

【0008】[0008]

【発明の実施の形態】以下、本発明の実施の形態につい
て、添付図面に基づいて詳細に説明する。図1は、本発
明にかかる屋外設置型金属製設備の錆の除去方法の一実
施例を示している。同図に示す錆の除去方法は、本発明
を送電線鉄塔10に適用した場合を示している。送電線
鉄塔10は、通常、母材鋼板の表面に防錆のための溶融
亜鉛メッキが施された溶融亜鉛メッキ鋼板が使用されて
いて、この鋼板を組み合わせて塔状に組み立てられてい
る。
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a method for removing rust in an outdoor installation type metal facility according to the present invention. The rust removal method shown in the figure shows the case where the present invention is applied to the transmission line tower 10. The power transmission line tower 10 usually uses a hot-dip galvanized steel plate in which the surface of a base steel plate is subjected to hot-dip galvanizing for rust prevention, and the steel plates are assembled in a tower shape.

【0009】この種の送電線鉄塔10には、溶融亜鉛メ
ッキ鋼板をそのまま使用する場合と、航空障害標識など
の塗装が施されたものがあり、航空障害標識の場合に
は、アクリル系やエポキシ系の塗料を使用して、赤白に
塗り分けられている。送電線用鉄塔10は、厳しい環境
条件下に晒されるため、メッキや塗装が経年変化により
劣化し、このような防錆処理の劣化に伴って、錆が発生
する。
There are two types of transmission line towers 10 of this type, which are made of hot-dip galvanized steel sheet as they are, and painted with aviation obstruction signs. In the case of aviation obstruction signs, acrylic or epoxy is used. It is painted red and white using a paint of the type. Since the power transmission line tower 10 is exposed to severe environmental conditions, the plating and coating are deteriorated due to secular change, and rust is generated along with the deterioration of the rust preventive treatment.

【0010】送電線鉄塔10に錆が発生した場合には、
本実施例では、以下に説明する方法によりこれを除去す
る。送電線鉄塔10の錆を除去する際には、送電線鉄塔
10の近傍に作業車12が配置される。作業車12に
は、ネオジウム・ヤグ(Nd:YAG)固体レーザ発生
装置14が電源などとともに搭載されている。また、こ
の固体レーザ発生装置14には、光ファイバ16が接続
されている。
When rust occurs on the transmission line tower 10,
In this embodiment, this is removed by the method described below. When removing rust from the power transmission line tower 10, the work vehicle 12 is arranged near the power transmission line tower 10. A neodymium-YAG (Nd: YAG) solid-state laser generator 14 is mounted on the work vehicle 12 together with a power source and the like. An optical fiber 16 is connected to the solid-state laser generator 14.

【0011】送電線鉄塔10の錆を除去する際には、レ
ーザ発生装置14を駆動して、この装置14から発射し
たレーザ光Lを、光ファイバ16内を伝播させて、光フ
ァイバ16の先端から出射させて、その直近から送電線
鉄塔10の表面に照射する。この時のレーザ光Lの照射
方法は、錆の発生箇所だけでなく、比較的広い範囲を走
査するように行なわれる。
When removing rust on the power transmission line tower 10, the laser generator 14 is driven so that the laser light L emitted from the device 14 is propagated through the optical fiber 16 and the tip of the optical fiber 16 is propagated. And irradiate the surface of the power transmission line tower 10 from the immediate vicinity. The irradiation method of the laser light L at this time is performed so as to scan not only the rust occurrence location but also a relatively wide range.

【0012】また、本実施例の場合には、レーザ光Lの
照射位置に対応させて反射率測定装置18を設置し、こ
の測定装置18によりレーザ光Lを照射した箇所の反射
率を測定する。レーザ光Lを金属母材の表面に塗装やメ
ッキなどの防錆処理が施された送電線鉄塔10の表面に
照射すると、錆の発生部分と金属母材との反射率の相違
から、錆の発生部分により多くの光エネルギーが吸収さ
れ、錆が微細破片となって、選択的に除去される。
Further, in the case of the present embodiment, the reflectance measuring device 18 is installed in correspondence with the irradiation position of the laser light L, and the measuring device 18 measures the reflectance of the portion irradiated with the laser light L. . When the surface of the power transmission line tower 10 on which the surface of the metal base material is subjected to rust prevention treatment such as painting or plating is irradiated with the laser light L, the difference in the reflectance between the rusted portion and the metal base material causes A large amount of light energy is absorbed by the generated portion, and the rust becomes fine fragments that are selectively removed.

【0013】なお、除去した錆の飛散を防止するために
は、例えば、レーザ光Lの照射位置に吸引式の集塵機の
吸引口を臨ませればよい。この場合、レーザ光Lは、光
ファイバでエネルギー伝送が可能なネオジウム・ヤグ
(Nd:YAG)固体レーザ発生装置14から発射させ
るので、屋外に設置されている送電線鉄塔10の近傍に
配置された作業車12から、殆ど伝送損失を起こすこと
なく、送電線鉄塔10に照射することができる。
In order to prevent scattering of the removed rust, for example, the suction port of the suction type dust collector may be made to face the irradiation position of the laser light L. In this case, since the laser light L is emitted from the neodymium yag (Nd: YAG) solid-state laser generator 14 capable of transmitting energy through an optical fiber, it is arranged near the power transmission line tower 10 installed outdoors. The work vehicle 12 can irradiate the transmission line tower 10 with almost no transmission loss.

【0014】また、レーザ光Lは、金ブラシの挿入が困
難な狭隘な場所でも簡単に照射することができ、このよ
うな部分に発生した錆を確実に除去することができる。
さらに、本実施例の場合には、レーザ光Lの照射は、送
電線鉄塔10の表面の反射率を反射率測定装置18で測
定しながら行なうので、リアルタイムで錆の除去対象物
の反射率が判り、測定された反射率から錆が的確に除去
されていることを確認することができる。
Further, the laser light L can be easily irradiated even in a narrow place where it is difficult to insert the gold brush, and the rust generated in such a portion can be surely removed.
Further, in the case of the present embodiment, the irradiation of the laser light L is performed while measuring the reflectance of the surface of the power transmission line tower 10 by the reflectance measuring device 18, so that the reflectance of the rust removal target object is measured in real time. It is possible to confirm that the rust is accurately removed from the measured reflectance.

【0015】図2は、本発明の除去方法が適用できる屋
外設置型の金属製設備の他の例を示している。同図に示
す金属製設備は、市街地などに立設されている配電柱2
0であって、この配電柱20には、高圧ないしは低圧電
線を支持する碍子22が取りつけられた複数の腕金24
が設けられているとともに、柱上変圧器26を支持する
変圧器台28が設けられている。
FIG. 2 shows another example of outdoor installation type metal equipment to which the removing method of the present invention can be applied. The metal equipment shown in the figure is a distribution pole 2 that is erected in an urban area.
No. 0, and a plurality of arms 24 having insulators 22 for supporting high-voltage or low-voltage electric wires attached to the distribution pole 20.
Is provided, and a transformer base 28 that supports the pole transformer 26 is provided.

【0016】この配電柱20は、送電線鉄塔10と同様
に屋外に設置されていて、腕金24や変圧器台28は、
溶融亜鉛メッキ鋼板から形成されていて、鉄塔10と同
様に経年変化により錆が発生する。腕金24や変圧器台
28に錆が発生すると、これを除去するために光ファイ
バ16を介して、レーザ光Lが腕金24や変圧器台28
の表面に照射され、上述した送電線鉄塔10と同様に錆
を除去する。
The distribution pole 20 is installed outdoors like the transmission line tower 10, and the arm 24 and the transformer base 28 are
It is made of hot-dip galvanized steel sheet, and like the steel tower 10, rust occurs due to aging. When rust is generated on the arm 24 and the transformer base 28, the laser light L is passed through the optical fiber 16 to remove the rust and the rust is generated on the arm 24 and the transformer base 28.
Is radiated to the surface of, and rust is removed similarly to the transmission line tower 10 described above.

【0017】本発明者は、レーザ光Lにより錆の除去が
できることを以下に説明する実験により確認した。この
実験では、試験片として溶融亜鉛メッキ鋼板と、この鋼
板に赤錆を発生させたもの、同鋼板に白錆を発生させた
ものの3種類を準備した。レーザ光発生装置としては、
発振波長が1.064μmで、パルス幅が9.25ns
の短パルスと200nsの長パルスの切替えができるネ
オジウム・ヤグ(Nd:YAG)固体レーザ(スペクト
ラ・フィジックス:CCR−250−10)を使用し
た。
The present inventor has confirmed by experiments described below that rust can be removed by the laser light L. In this experiment, three types of test pieces were prepared as hot-dip galvanized steel sheets, a steel sheet in which red rust was generated, and a steel sheet in which white rust was generated. As a laser light generator,
Oscillation wavelength is 1.064 μm, pulse width is 9.25 ns
A neodymium yag (Nd: YAG) solid-state laser (Spectra Physics: CCR-250-10) capable of switching between a short pulse and a long pulse of 200 ns was used.

【0018】これらの試験片の錆の除去試験を行なう前
に、まず、各試験片の相対的な反射率を紫外可視赤外分
光光度計(日本分光株式会社製:V−570)で測定し
た.このときの測定結果を表1に示している。 表1に示した測定結果から、溶融亜鉛メッキ鋼板と他の
試験片との間に大きな反射率の相違があることがわか
る。次に、各試験片の表面粗さと膜厚とを表面粗さ形状
測定機(東京精密製:サーフコム533AD)により測
定した。この測定結果を表2に示している。 図3は、光ファイバでレーザ光を溶融亜鉛メッキ鋼板に
照射したときに、金属母材にレーザ光の照射痕跡がどの
程度のエネルギー密度で発生するか否かを測定した試験
結果である。同図に示す試験結果では、横軸に照射エネ
ルギー密度が、縦軸に平均ピーク強度が表されていて、
×印で示した条件では、溶融亜鉛メッキ鋼板に、レーザ
光の照射痕跡が残らなかった場合を示している。
Before carrying out the rust removal test of these test pieces, first, the relative reflectance of each test piece was measured by an ultraviolet-visible infrared spectrophotometer (V-570 manufactured by JASCO Corporation). . The measurement results at this time are shown in Table 1. From the measurement results shown in Table 1, it can be seen that there is a large difference in reflectance between the hot-dip galvanized steel sheet and the other test pieces. Next, the surface roughness and the film thickness of each test piece were measured by a surface roughness profile measuring device (manufactured by Tokyo Seimitsu: Surfcom 533AD). The measurement results are shown in Table 2. FIG. 3 is a test result of measuring at what energy density the irradiation trace of the laser beam is generated on the metal base material when the hot dip galvanized steel sheet is irradiated with the laser beam by the optical fiber. In the test results shown in the figure, the horizontal axis represents the irradiation energy density, and the vertical axis represents the average peak intensity.
Under the conditions indicated by X, there are no traces of laser light irradiation left on the hot-dip galvanized steel sheet.

【0019】この試験結果から、レーザ光を約10ns
程度の短パルスで照射する時には、そのエネルギー密度
を0.4ジュール/cm2 以下にすると、金属母材に損
傷を与えないことが判る。また、レーザ光を約200n
s程度の長パルスで照射する時には、そのエネルギー密
度を3.0ジュール/cm2 以下にすると、同様に金属
母材に損傷を与えないことが判る。
From this test result, a laser beam of about 10 ns
It can be seen that, when the energy density is set to 0.4 Joule / cm 2 or less when the irradiation is performed with a short pulse, the metal base material is not damaged. Also, the laser light is about 200n
It can be seen that, when irradiation is performed with a long pulse of about s, if the energy density is 3.0 joules / cm 2 or less, the metal base material is not damaged in the same manner.

【0020】図4は、赤錆が発生している試験片にレー
ザ光を照射したときの試験結果であって、同図に○印で
示した条件で赤錆が除去できた場合を示している。この
試験結果から、レーザ光を約10ns程度の短パルスで
照射する時には、そのエネルギー密度を0.28ジュー
ル/cm2 以上にすると、赤錆が除去できることが判
る。また、レーザ光を約200ns程度の長パルスで照
射する時には、そのエネルギー密度を1.1ジュール/
cm2 以上にすると、同様に赤錆が除去できることが判
る。
FIG. 4 shows the test results when the test piece in which the red rust had occurred was irradiated with laser light, and shows the case where the red rust could be removed under the conditions shown by the circles in the figure. From this test result, it can be seen that when the laser beam is irradiated with a short pulse of about 10 ns, the red rust can be removed by setting the energy density to 0.28 Joule / cm 2 or more. When the laser beam is irradiated with a long pulse of about 200 ns, the energy density is 1.1 joule /
It can be seen that red rust can be removed similarly when the area is at least cm 2 .

【0021】図5は、白錆が発生している試験片にレー
ザ光を照射したときの試験結果であって、同図に○印で
示した条件で白錆が除去できた場合を示している。この
試験結果から、レーザ光を約10ns程度の短パルスで
照射する時には、そのエネルギー密度を0.9ジュール
/cm2 以上にすると、白錆が除去できることが判る。
また、レーザ光を約200ns程度の長パルスで照射す
る時には、そのエネルギー密度を2.0ジュール/cm
2 以上にすると、同様に白錆が除去できることが判る。
FIG. 5 shows the test results when a test piece in which white rust was generated was irradiated with laser light, and shows the case where the white rust could be removed under the conditions indicated by the circles in the figure. There is. From this test result, it can be seen that white rust can be removed by irradiating the laser beam with a short pulse of about 10 ns and setting the energy density to 0.9 joule / cm 2 or more.
When the laser beam is irradiated with a long pulse of about 200 ns, its energy density is 2.0 joule / cm.
It can be seen that white rust can be similarly removed by setting it to 2 or more.

【0022】図3〜図5に示した試験結果から、以下の
ことが判る。すなわち、送電線鉄塔などの屋外設置型の
金属製設備の除去対象が赤錆であって、この赤錆を除去
する際に、レーザ光を約10ns程度の短パルスで照射
する時に、そのエネルギー密度を0.4ジュール/cm
2 以下で、0.28ジュール/cm2 以上に設定するこ
と、金属母材に損傷を与えることなく、赤錆だけを選択
的に除去することができる。
From the test results shown in FIGS. 3 to 5, the following can be understood. That is, red rust is to be removed from outdoor installation type metal equipment such as a power transmission line tower, and when removing the red rust, when irradiating a laser beam with a short pulse of about 10 ns, the energy density is 0. .4 joules / cm
If it is 2 or less and is set to 0.28 Joule / cm 2 or more, only the red rust can be selectively removed without damaging the metal base material.

【0023】また、金属製設備の除去対象が赤錆であっ
て、この赤錆を除去する際に、レーザ光を約200ns
程度の長パルスで照射する時に、そのエネルギー密度を
3.0ジュール/cm2 以下で、1.1ジュール/cm
2 以上に設定すると、金属母材に損傷を与えることな
く、赤錆だけを選択的に除去することができる。さら
に、金属製設備の除去対象が白錆であって、この白錆を
除去する際に、前記レーザ光を約200ns程度の長パ
ルスで照射する時に、そのエネルギー密度を3.0ジュ
ール/cm2 以下で、1.0ジュール/cm2 以上に設
定すると、金属母材に損傷を与えることなく、白錆だけ
を選択的に除去することができる。
Further, the object of removal of the metal equipment is red rust, and when removing this red rust, laser light is applied for about 200 ns.
When irradiating with a long pulse of about 300 joules / cm 2 or less, the energy density is 1.1 joules / cm 2 or less.
When set to 2 or more, only the red rust can be selectively removed without damaging the metal base material. Further, the object to be removed by the metal equipment is white rust, and when the white rust is removed, when the laser beam is irradiated with a long pulse of about 200 ns, the energy density thereof is 3.0 joules / cm 2. Below, if it is set to 1.0 Joule / cm 2 or more, only white rust can be selectively removed without damaging the metal base material.

【0024】なお、白錆の場合には、レーザ光を約10
ns程度の短パルスで照射するときには、そのエネルギ
ー密度を0.9ジュール/cm2 以上にすると、これが
除去できるが、このエネルギー密度では、金属母材に損
傷を与える恐れがあるので、望ましくない。また、上記
実施例では、本発明が適用できる屋外設置型の金属製設
備として、送電線鉄塔10と配電柱20とを例示した
が、本発明の適用は、これらに限られることはなく、例
えば、火力発電所内煙突,変電所内鉄塔など錆が発生す
るものであれば各種の金属製設備に適用することができ
る。
In the case of white rust, a laser beam of about 10 is used.
When irradiating with a short pulse of about ns, if the energy density is set to 0.9 joule / cm 2 or more, this can be removed, but this energy density is not desirable because it may damage the metal base material. Moreover, in the said Example, although the transmission line steel tower 10 and the power distribution pole 20 were illustrated as an outdoor installation type metal installation to which this invention can be applied, the application of this invention is not limited to these, For example, It can be applied to various kinds of metal equipment as long as rust is generated, such as a chimney in a thermal power plant and a steel tower in a substation.

【0025】さらに、上記実施例では、レーザ光Lの照
射による錆の除去中に、対応する箇所の反射率を反射率
測定装置18で測定する方法を例示したが、単に、錆を
除去するだけであれば反射率測定装置18は、必ずしも
使用する必要はない。
Further, in the above embodiment, the method of measuring the reflectance of the corresponding portion with the reflectance measuring device 18 during the removal of the rust by the irradiation of the laser beam L has been exemplified, but the rust is simply removed. In that case, the reflectance measuring device 18 does not necessarily have to be used.

【0026】[0026]

【発明の効果】以上、実施例で詳細に説明したように、
本発明にかかる屋外設置型金属製設備の錆の除去方法に
よれば、所定波長のレーザ光を光ファイバで導いて、錆
が発生している部分の表面に照射することで、錆を簡単
に除去できるので、高所作業の作業能率が飛躍的に向上
する。
As described above in detail in the embodiments,
According to the method for removing rust of outdoor-installed metal equipment according to the present invention, by guiding a laser beam of a predetermined wavelength with an optical fiber and irradiating the surface of the portion where rust has occurred, rust can be easily formed. Since it can be removed, the work efficiency of work at high places is dramatically improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明にかかる錆の除去方法を送電線鉄塔に適
用した場合の実施状況の説明図である。
FIG. 1 is an explanatory diagram of an implementation situation when a rust removal method according to the present invention is applied to a transmission line tower.

【図2】本発明にかかる錆の除去方法を配電線柱に適用
した場合の実施状況の説明図である。
FIG. 2 is an explanatory diagram of an implementation state when the rust removal method according to the present invention is applied to a distribution line column.

【図3】レーザ光を溶融亜鉛メッキ鋼板に照射した際の
痕跡発生試験の結果を示すグラフである。
FIG. 3 is a graph showing the results of a trace generation test when a hot dip galvanized steel sheet is irradiated with laser light.

【図4】レーザ光を赤錆が発生している部分に照射した
際の除去試験の結果を示すグラフである。
FIG. 4 is a graph showing a result of a removal test when laser light is applied to a portion where red rust is generated.

【図5】レーザ光を白錆が発生している部分に照射した
際の除去試験の結果を示すグラフである。
FIG. 5 is a graph showing the results of a removal test when a portion where white rust is generated is irradiated with laser light.

【符号の説明】[Explanation of symbols]

10 送電線鉄塔(屋外設置型金属製設
備) 12 作業車 14 レーザ光発生装置 16 光ファイバ 18 反射率測定装置
10 Transmission line tower (outdoor installation type metal equipment) 12 Work vehicle 14 Laser light generator 16 Optical fiber 18 Reflectance measuring device

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 屋外に設置され、金属母材の表面に塗装
やメッキなどの防錆処理が施された金属製設備の錆の除
去方法において、 前記金属製設備に錆が発生した際に、当該金属製設備の
表面に光ファイバを介して所定波長のレーザ光を照射す
ることを特徴とする屋外設置型金属製設備の錆の除去方
法。
1. A method for removing rust in a metal facility, which is installed outdoors and whose surface of a metal base material has been subjected to anticorrosion treatment such as painting or plating, when rust occurs in the metal facility, A method for removing rust from an outdoor-installed metal facility, comprising irradiating a surface of the metal facility with laser light having a predetermined wavelength through an optical fiber.
【請求項2】 前記金属製設備は、送電線鉄塔,火力発
電所内煙突,変電所内鉄塔,配電柱の腕金および変電器
受け台などの電力設備であることを特徴とする請求項1
記載の屋外設置型金属製設備の錆の除去方法。
2. The metal facility is a power facility such as a transmission line tower, a chimney inside a thermal power station, a tower inside a substation, a distribution pole arm, and a substation cradle.
Method for removing rust from the outdoor installation type metal equipment described.
【請求項3】 前記レーザ光の照射は、前記金属製設備
の表面の反射率を測定しながら行なうことを特徴とする
請求項1または2記載の屋外設置型金属製設備の錆の除
去方法。
3. The method for removing rust in an outdoor installation type metal facility according to claim 1, wherein the laser light irradiation is performed while measuring the reflectance of the surface of the metal facility.
【請求項4】 前記金属製設備の除去対象が赤錆であっ
て、この赤錆を除去する際に、前記レーザ光を約10n
s程度の短パルスで照射する時に、そのエネルギー密度
を0.4ジュール/cm2 以下で、0.28ジュール/
cm2 以上に設定することを特徴とする請求項1から3
のいずれか1項記載の屋外設置型金属製設備の錆の除去
方法。
4. The removal target of the metal equipment is red rust, and when the red rust is removed, the laser light is applied to about 10 n.
When irradiating with a short pulse of about s, the energy density is 0.4 Joule / cm 2 or less and 0.28 Joule / cm 2.
4. It is set to be not less than 2 cm.sup.3.
The method for removing rust from an outdoor-installed metal facility according to any one of 1.
【請求項5】 前記金属製設備の除去対象が赤錆であっ
て、この赤錆を除去する際に、前記レーザ光を約200
ns程度の長パルスで照射する時に、そのエネルギー密
度を3.0ジュール/cm2 以下で、1.1ジュール/
cm2 以上に設定することを特徴とする請求項1から3
のいずれか1項記載の屋外設置型金属製設備の錆の除去
方法。
5. The object to be removed by the metal equipment is red rust, and the laser light is applied to about 200 when the red rust is removed.
When irradiated with a long pulse of about ns, the energy density is 3.0 joules / cm 2 or less, 1.1 joules / cm 2 or less.
4. It is set to be not less than 2 cm.sup.3.
The method for removing rust from an outdoor-installed metal facility according to any one of 1.
【請求項6】 前記金属製設備の除去対象が白錆であっ
て、この白錆を除去する際に、前記レーザ光を約200
ns程度の長パルスで照射する時に、そのエネルギー密
度を3.0ジュール/cm2 以下で、1.0ジュール/
cm2 以上に設定することを特徴とする請求項1から3
のいずれか1項記載の屋外設置型金属製設備の錆の除去
方法。
6. The object to be removed by the metal equipment is white rust, and the laser light is applied to about 200 when removing the white rust.
When irradiated with a long pulse of about ns, the energy density is 3.0 joules / cm 2 or less, 1.0 joule / cm 2 or less.
4. It is set to be not less than 2 cm.sup.3.
The method for removing rust from an outdoor-installed metal facility according to any one of 1.
JP7235096A 1996-03-27 1996-03-27 Rust removal method for metal equipment installed outdoors Expired - Fee Related JP3306291B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7235096A JP3306291B2 (en) 1996-03-27 1996-03-27 Rust removal method for metal equipment installed outdoors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7235096A JP3306291B2 (en) 1996-03-27 1996-03-27 Rust removal method for metal equipment installed outdoors

Publications (2)

Publication Number Publication Date
JPH09253876A true JPH09253876A (en) 1997-09-30
JP3306291B2 JP3306291B2 (en) 2002-07-24

Family

ID=13486781

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Country Status (1)

Country Link
JP (1) JP3306291B2 (en)

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