JP3175068U - Water pipe electric protection system - Google Patents

Water pipe electric protection system Download PDF

Info

Publication number
JP3175068U
JP3175068U JP2012000627U JP2012000627U JP3175068U JP 3175068 U JP3175068 U JP 3175068U JP 2012000627 U JP2012000627 U JP 2012000627U JP 2012000627 U JP2012000627 U JP 2012000627U JP 3175068 U JP3175068 U JP 3175068U
Authority
JP
Japan
Prior art keywords
pipe
water pipe
terminal
potential
water
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.)
Expired - Fee Related
Application number
JP2012000627U
Other languages
Japanese (ja)
Inventor
賢太郎 西
行正 伊村
慎次 蛯子
義一 山下
Original Assignee
株式会社サニコン
株式会社山下電機
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 株式会社サニコン, 株式会社山下電機 filed Critical 株式会社サニコン
Priority to JP2012000627U priority Critical patent/JP3175068U/en
Application granted granted Critical
Publication of JP3175068U publication Critical patent/JP3175068U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Prevention Of Electric Corrosion (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

【課題】水道管の管内面に被膜が施されている内面内張管において、長期間に亘って配管内における防食を一定状態に保つ電気防食システムを提供する。
【解決手段】陽極端子、陰極端子、照合電極端子を備える外部電源装置１と、陰極端子に電気的に接続され、鋼管内に内面内張塗膜が施された水道管４，５と、陽極端子に電気的に接続されると共に、水道管４，５内の管軸方向に、水道管４，５と電気的絶縁が図られて配設された線電極６と、照合電極端子に電気的に接続されると共に、水道管４の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される照合電極７とを備え、照合電極端子に対する陰極端子の電位を検出し該電位が所定の電位となるように、陽極端子から出力される直流電圧を制御して、水道管４，５内の鉄露出部１２，１３の電気防食を図る。
【選択図】図１The present invention provides an anticorrosion system that keeps anticorrosion in a pipe in a constant state over a long period of time in an inner lining pipe in which a coating is applied to the inner face of a water pipe.
An external power supply device having an anode terminal, a cathode terminal, and a reference electrode terminal, water pipes 4 and 5 electrically connected to the cathode terminal and coated with an inner surface lining film in a steel pipe, an anode The electrode 6 is electrically connected to the terminal and is electrically insulated from the water pipes 4 and 5 in the direction of the axis of the pipes 4 and 5 and electrically connected to the reference electrode terminal. And a reference electrode 7 that is arranged to be electrically insulated from the pipe wall from the pipe wall of the water pipe 4 into the pipe, and detects the potential of the cathode terminal with respect to the reference electrode terminal. The direct current voltage output from the anode terminal is controlled so that the potential becomes a predetermined potential, thereby preventing the corrosion of the iron exposed portions 12 and 13 in the water pipes 4 and 5.
[Selection] Figure 1

Description

本考案は、外部電源方式の水道管内面の電気防食システムに関する。   The present invention relates to an anticorrosion system for an inner surface of a water pipe of an external power supply system.

従来、水道管には亜鉛メッキ鋼管が用いられていたため、配管内が腐食し、防食を施す必要があった。しかし、近年では、水道管に、亜鉛メッキ鋼管に代えて、内面内張管として硬質塩化ビニルライニング管が使用されるようになった。しかし、この内面内張管は、鋼管内面に硬質塩化ビニル皮膜が内張りされているので、管内面に鋼材が露出することはないが、亜鉛メッキ鋼管の経年管に対して実施された内面エポキシライニングの経年変化や塗膜時の塗膜ムラによって、内面内張管の内面が劣化した際、鋼材が露出し、露出箇所において錆が発生したり、また、内面内張管であっても、継手で連結されて使用される場合は、配管と継手との接合部分に鋼材端面が露出し、その露出箇所において錆が発生するため、配管に防食を施す必要があった。   Conventionally, since a galvanized steel pipe has been used for a water pipe, the inside of the pipe has been corroded and it has been necessary to provide corrosion protection. However, in recent years, instead of galvanized steel pipes, hard vinyl chloride lining pipes have been used as inner lining pipes for water pipes. However, this inner lining pipe has a hard vinyl chloride film lined on the inner surface of the steel pipe, so that the steel material is not exposed on the inner surface of the pipe, but the inner surface epoxy lining applied to the aging pipe of the galvanized steel pipe When the inner surface of the inner lining pipe deteriorates due to aging of the film or unevenness of the coating film, the steel material is exposed, rust is generated at the exposed part, and even if it is an inner lining pipe, When connected and used, the end face of the steel material is exposed at the joint between the pipe and the joint, and rust is generated at the exposed portion, so that the pipe must be protected against corrosion.

特許文献１には、従来技術に係る給水用配管内における防食技術が開示されている。この防食技術によれば、カルシウムイオン及びマグネシウムイオン等を含む水の給水用の配管内に線状電極を配設し、線状電極を陽極、配管を陰極として外部電源から通電し、配管の内面にカルシウム及びマグネシウムを含む塩基性化合物の皮膜を形成させることにより、防食を行うものである。   Patent Document 1 discloses an anticorrosion technique in a water supply pipe according to the prior art. According to this anti-corrosion technology, a linear electrode is disposed in a water supply pipe containing calcium ions, magnesium ions, etc., and an electric current is supplied from an external power source using the linear electrode as an anode and the pipe as a cathode. Corrosion protection is performed by forming a film of a basic compound containing calcium and magnesium on the surface.

特開２０００−２７３６６５号公報JP 2000-273665 A

しかしながら、従来技術に係る防食技術によれば、外部電源に定電圧源が用いられているために、配管の内面にカルシウムやマグネシウムを含む塩基性化合物の皮膜が形成されるに従って、外部電源から見た配管網が高抵抗化するため、通電電流が減少し、配管網内面の鉄露出部全てに対して、防食電流が供給されず、防食することができないという問題があった。
本考案の目的は、上記の問題点に鑑みて成されたものであり、水道管の管内面に硬質塩化ビニル被膜のような被膜が施されている内面内張管において、長期間に亘って配管内における防食を可能にした水道管の電気防食システムを提供することにある。 However, according to the anticorrosion technique according to the prior art, since a constant voltage source is used for the external power supply, as the basic compound film containing calcium or magnesium is formed on the inner surface of the pipe, it is viewed from the external power supply. In addition, since the resistance of the pipe network is increased, the energization current is reduced, and the anticorrosion current is not supplied to all of the exposed iron portions on the inner surface of the pipe network, thereby preventing the corrosion.
An object of the present invention is made in view of the above-mentioned problems. In an inner surface lining pipe in which a coating such as a hard vinyl chloride coating is applied to the inner surface of a water pipe, the inner surface is extended over a long period of time. An object of the present invention is to provide an electric corrosion prevention system for water pipes that enables corrosion prevention in piping.

本考案は、上記の課題を解決するために、次のような手段を採用した。
第１の手段は、陽極端子、陰極端子、及び照合電極端子を備える外部電源装置と、前記陰極端子に電気的に接続され、鋼管製の管壁内に内面内張塗膜が施された水道管と、前記陽極端子に電気的に接続されると共に、前記水道管内の管軸方向に、前記水道管と電気的絶縁が図られて配設された線電極と、前記照合電極端子に電気的に接続されると共に、前記水道管の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される照合電極とを備え、前記照合電極端子に対する前記陰極端子の電位を検出し該電位が所定の電位となるように、前記陽極端子から出力される直流電圧を制御することによって、前記水道管内の前記内面内張塗膜における鉄露出部の電気防食を図ることを特徴とする水道管の電気防食システムである。
第２の手段は、陽極端子、陰極端子、及び照合電極端子を備える外部電源装置と、前記陰極端子に電気的に接続され、鋼管製の管壁内に内面内張塗膜が施された内側水道管と、該内側水道管の外面に嵌合して継ぎ足すように接続された鋼材製の管内面に内面内張塗膜が施された外側水道管と、前記陽極端子に電気的に接続されると共に、前記内側水道管及び外側水道管内の管軸方向に、前記内側水道管及び外側水道管と電気的絶縁が図られて配設された線電極と、前記照合電極端子に電気的に接続されると共に、前記内側水道管の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される照合電極とを備え、前記照合電極端子に対する前記陰極端子の電位を検出し該電位が所定の電位となるように、前記陽極端子から出力される直流電圧を制御することによって、前記外側水道管内に嵌合している内側水道管の管端における鉄露出部の電気防食を図ることを特徴とする水道管の電気防食システムである。
第３の手段は、第１の手段又は第２の手段において、前記所定の電位が人工海水塩化銀電極基準に基づく−７８０ｍＶ〜−８００ｍＶの範囲内に設定された電位であることを特徴とする水道管の電気防食システムである。
第４の手段は、第１の手段ないし第３の手段のいずれかの手段において、前記内面内張塗膜が硬質塩化ビニルライニングであることを特徴とする水道管の電気防食システムである。
第５の手段は、第１の手段ないし第３の手段のいずれかの手段において、前記内面内張塗膜がエポキシライニングであることを特徴とする水道管の電気防食システムである。
第６の手段は、第１の手段ないし第３の手段のいずれかの手段において、前記内面内張塗膜が樹脂被膜であることを特徴とする水道管の電気防食システムである。 The present invention employs the following means in order to solve the above problems.
The first means is an external power supply device including an anode terminal, a cathode terminal, and a reference electrode terminal, and a water supply electrically connected to the cathode terminal and having an inner wall-coated film in a steel pipe wall. A wire electrode electrically connected to the anode terminal and electrically insulated from the water pipe in the direction of the tube axis in the water pipe, and electrically connected to the reference electrode terminal And a reference electrode arranged to be electrically insulated from the pipe wall from the pipe wall to the inside of the pipe, and detects the potential of the cathode terminal with respect to the reference electrode terminal Then, by controlling the direct-current voltage output from the anode terminal so that the potential becomes a predetermined potential, it is possible to achieve an anticorrosion of the iron exposed portion in the inner surface lining coating film in the water pipe. This is an anticorrosion system for water pipes.
The second means includes an external power supply device including an anode terminal, a cathode terminal, and a reference electrode terminal, and an inner side electrically connected to the cathode terminal and having an inner surface lining coating applied to a steel tube wall Electrically connected to the anode terminal, a water pipe, an outer water pipe with an inner lining coating applied to the inner surface of the steel pipe connected to the outer surface of the inner water pipe, In addition, in the axial direction of the inner water pipe and the outer water pipe, a line electrode disposed in electrical insulation with the inner water pipe and the outer water pipe, and the reference electrode terminal is electrically connected And a reference electrode arranged to be electrically insulated from the pipe wall from the pipe wall of the inner water pipe into the pipe and detecting the potential of the cathode terminal with respect to the reference electrode terminal The DC power output from the anode terminal so that the potential becomes a predetermined potential. By controlling the a cathodic protection system of water pipes, characterized in that to achieve cathodic protection of the iron exposed portion at the pipe end of the inner water pipes fitted to the outer water tube.
The third means is characterized in that, in the first means or the second means, the predetermined potential is a potential set in a range of −780 mV to −800 mV based on an artificial silver chloride salt electrode standard. It is an electric corrosion protection system for water pipes.
A fourth means is the water pipe electrocorrosion protection system according to any one of the first means to the third means, wherein the inner lining coating film is a hard vinyl chloride lining.
A fifth means is the water pipe electrocorrosion protection system according to any one of the first means to the third means, wherein the inner lining coating film is an epoxy lining.
A sixth means is the water pipe electro-corrosion protection system according to any one of the first to third means, wherein the inner surface lining film is a resin film.

請求項１に記載の考案によれば、照合電極に対する水道管の電位を常時監視することにより適正に鉄露出部における防食を図ることができると共に防食状態を保持することができ、また、電力を無駄に使用することのない経済的な防食システムを提供することができる。
請求項２に記載の考案によれば、外側水道管内に嵌合している内側水道管の管端における鉄露出部の電気防食を効果的に図ることができる。 According to the first aspect of the invention, by constantly monitoring the potential of the water pipe with respect to the reference electrode, it is possible to properly prevent corrosion in the exposed iron portion and maintain the anticorrosion state. An economical anticorrosion system that is not wasted can be provided.
According to the second aspect of the invention, it is possible to effectively prevent the corrosion of the iron exposed portion at the pipe end of the inner water pipe fitted into the outer water pipe.

本考案に係る水道管の電気防食システムの構成を示す断面図である。It is sectional drawing which shows the structure of the cathodic protection system of the water pipe which concerns on this invention. 図１に示した外部電源装置の回路構成の一例を示す図である。It is a figure which shows an example of the circuit structure of the external power supply device shown in FIG.

本考案の実施形態を図１及び図２を用いて説明する。
図１は、本実施形態の考案に係る水道管の電気防食システムの概略構成を示す断面図である。
同図において、１は照合電極７で検出された電位に応じて制御された直流電圧を出力する外部電源装置、２，３は絶縁性の電極貫通具、４は鋼管内面に硬質塩化ビニルライニング等の内面内張塗膜が施された水道管（内側水道管）、５は水道管４の外面に嵌合するように継ぎ足し接続された鋼管内面に硬質塩化ビニルライニング等の内面内張塗膜が施された水道管（外側水道管）、６は陽極端子に電気的に接続されると共に、水道管４，５との電気的接触を防止するための絶縁保護被覆が施された、水道管４，５内の管軸方向に配設された、例えば、チタン・イリジウム等からなる線電極、７は照合電極端子に電気的に接続されると共に、水道管４の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される水道管４内に配設され管内を流れる水道水の電位を検出する、例えば、チタン・イリジウム等からなる照合電極、８は外部電源装置１の陽極端子と線電極５との間を接続するリード線、９は外部電源装置１の陰極端子と鋼材製の水道管４との間を接続するリード線、１０は外部電源装置１の照合電極端子と照合電極７間を接続するリード線、１１は水道管４，５の内面に施された硬質塩化ビニルライニング等の内面内張塗膜、１２は水道管４，５の管内面に塗膜された内面内張塗膜の塗布ムラや劣化により鋼材が露出した鉄露出部、１３は水道管４端部の内面内張塗膜が塗膜されていないため鋼材が露出し錆び等が析出される鉄露出部である。なお、水道管４，５の内面内張塗膜としては塩化ビニルライニングの他にエポキシライニング、樹脂被膜等が用いられる。 An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view showing a schematic configuration of a water pipe electric corrosion protection system according to the present embodiment.
In the figure, 1 is an external power supply device that outputs a DC voltage controlled according to the potential detected by the verification electrode 7, 2 and 3 are insulative electrode penetrators, 4 is a hard vinyl chloride lining on the inner surface of the steel pipe, etc. Water pipes (inner water pipes) with an inner lining coating of 5 are added to the outer surface of the water pipe 4, and the inner lining coating such as hard vinyl chloride lining is attached to the inner surface of the connected steel pipe. The provided water pipe (outer water pipe) 6 is electrically connected to the anode terminal and is provided with an insulating protective coating for preventing electrical contact with the water pipes 4 and 5. , 5 arranged in the direction of the tube axis, for example, a wire electrode made of titanium, iridium or the like, 7 is electrically connected to the reference electrode terminal, and from the pipe wall of the water pipe 4 toward the inside of the pipe, Inside the water pipe 4 which is placed in the water pipe 4 which is electrically insulated from the pipe wall. For example, a reference electrode made of titanium, iridium or the like is used to detect the potential of flowing tap water, 8 is a lead wire connecting the anode terminal of the external power supply 1 and the line electrode 5, and 9 is a cathode of the external power supply 1. Lead wires for connecting between the terminal and the steel water pipe 4, 10 is a lead wire for connecting between the reference electrode terminal of the external power supply 1 and the reference electrode 7, and 11 is provided on the inner surfaces of the water pipes 4, 5. An inner-lined coating film such as hard vinyl chloride lining, 12 is an iron exposed part where the steel material is exposed due to coating unevenness or deterioration of the inner-lined coating film coated on the inner surface of the water pipes 4 and 5, 13 is a water supply This is an iron exposed portion where the steel material is exposed and rust is deposited because the inner surface lining coating at the end of the tube 4 is not coated. In addition to the vinyl chloride lining, an epoxy lining, a resin coating or the like is used as the inner surface lining coating of the water pipes 4 and 5.

図２は、図１に示した外部電源装置１の回路構成の一例を示す図である。
同図において、１４，１５は外部電源装置１から制御された直流電圧を出力する陽極端子及び陰極端子、１６は照合電極７で検出された電位を入力する照合電極端子、１７は照合電極端子１６（照合電極７）に対する陰極端子１５（鋼材からなる水道管４管壁）の電位を検出して比較する比較部、１８は比較部１７で検出された電位を増幅する増幅部、１９は増幅部１８で増幅された増幅信号に応じて陽極端子１４に出力される直流電圧を制御する半導体素子等からなる制御部である。 FIG. 2 is a diagram showing an example of a circuit configuration of the external power supply device 1 shown in FIG.
In the figure, reference numerals 14 and 15 denote an anode terminal and a cathode terminal for outputting a DC voltage controlled from the external power supply device 1, reference numeral 16 denotes a verification electrode terminal for inputting a potential detected by the verification electrode 7, and reference numeral 17 denotes a verification electrode terminal 16. A comparison unit that detects and compares the potential of the cathode terminal 15 (four water pipe wall walls made of steel) with respect to (reference electrode 7), 18 is an amplification unit that amplifies the potential detected by comparison unit 17, and 19 is an amplification unit The control unit includes a semiconductor element that controls the DC voltage output to the anode terminal 14 in accordance with the amplified signal amplified at 18.

次に、本考案の防食システムにおける防食のメカニズムについて図１及び図２を参照して説明する。
これらの図に示すように、外部電源装置１により交流電圧から直流電圧に変換され制御部１６によって制御された直流電圧は、陽極端子１４からリード線８、線電極６、水道管４，５内の水道水、鉄露出部１２，１３、鋼材からなる水道管４，５、リード線９を介して陰極端子１５間に印加される。その結果、陽極端子１４から鉄露出部１２，１３を介して陰極端子１５に直流電流が流れるので、鉄露出部１２，１３は修復され不動体状態となり防食が達成される。鉄露出部１２，１３に流れる電流は、照合電極７に対する鋼材からなる水道管４，５の電位を常時監視することにより制御される。つまり、照合電極７に対する鋼材からなる水道管４，５の電位が所定の電位、例えば、人工海水塩化銀電極基準に基づく−７８０ｍＶ〜−８００ｍＶの範囲内に設定された電位、つまり、電気防食により水道管内面の露出鉄部が不動態の範囲内に設定された電位状態に達したら鉄露出部１２，１３に流れる電流を停止するように、外部電源装置１から出力される直流電圧を制御する。すなわち、検出された電位が前記所定の電位以上の場合は、前記所定の電位になるまで鉄露出部１２，１３に直流電流を流して鉄露出部１２，１３の修復を促進し、検出された電位が前記所定の電位以下になった場合は、鉄露出部１２，１３に過剰に電流が流れることによって鉄露出部１２，１３に過剰な酸化カルシウムや酸化マグネシウム等が析出されることを抑制するように制御する。
このように、本考案の防食システムによれば、照合電極７に対する水道管４，５の電位を常時監視することにより適正に鉄露出部１２，１３における防食を図ることが出来ると共に防食状態を保持することができる。また、本考案の防食システムによれば、照合電極７に対する水道管の電位が所定の電位に保持されている間は外部電源装置１を動作させて直流電圧を出力させる必要がないので、従来の定電圧方式や定電流方式の防食システムに比べて、電力を無駄に使用することのない経済的な防食システムを提供することができる。 Next, the anticorrosion mechanism in the anticorrosion system of this invention is demonstrated with reference to FIG.1 and FIG.2.
As shown in these figures, the DC voltage converted from an AC voltage to a DC voltage by the external power supply 1 and controlled by the control unit 16 is supplied from the anode terminal 14 to the lead wire 8, the wire electrode 6, and the water pipes 4, 5. The tap water, the exposed iron portions 12 and 13, the water pipes 4 and 5 made of steel, and the lead wire 9 are applied between the cathode terminals 15. As a result, since a direct current flows from the anode terminal 14 to the cathode terminal 15 via the iron exposed portions 12 and 13, the iron exposed portions 12 and 13 are repaired to be in a non-moving state, thereby achieving corrosion prevention. The current flowing through the iron exposed portions 12 and 13 is controlled by constantly monitoring the potential of the water pipes 4 and 5 made of steel with respect to the verification electrode 7. That is, the potential of the water pipes 4 and 5 made of steel with respect to the reference electrode 7 is set to a predetermined potential, for example, a potential set within a range of −780 mV to −800 mV based on the artificial seawater chloride chloride electrode standard, that is, by anticorrosion. When the exposed iron part on the inner surface of the water pipe reaches a potential state set within a passive range, the DC voltage output from the external power supply device 1 is controlled so that the current flowing through the iron exposed parts 12 and 13 is stopped. . That is, when the detected potential is equal to or higher than the predetermined potential, a direct current is passed through the iron exposed portions 12 and 13 to promote the repair of the iron exposed portions 12 and 13 until the predetermined potential is reached. When the electric potential is equal to or lower than the predetermined electric potential, it is possible to suppress excessive calcium oxide, magnesium oxide, or the like from being deposited on the iron exposed portions 12 and 13 due to excessive current flowing through the iron exposed portions 12 and 13. To control.
As described above, according to the anticorrosion system of the present invention, by constantly monitoring the potentials of the water pipes 4 and 5 with respect to the verification electrode 7, the anticorrosion in the iron exposed portions 12 and 13 can be properly achieved and the anticorrosion state is maintained. can do. Further, according to the anticorrosion system of the present invention, it is not necessary to operate the external power supply device 1 and output a DC voltage while the potential of the water pipe with respect to the verification electrode 7 is maintained at a predetermined potential. Compared to a constant voltage system or a constant current system anticorrosion system, it is possible to provide an economical anticorrosion system that does not waste power.

１ 外部電源装置
２，３ 電極貫通具
４，５ 水道管
６ 線電極
７ 照合電極
８，９，１０ リード線
１１ 内面内張塗膜
１２，１３ 鉄露出部
１４ 陽極端子
１５ 陰極端子
１６ 照合電極端子
１７ 比較部
１８ 増幅部
１９ 制御部 DESCRIPTION OF SYMBOLS 1 External power supply device 2, 3 Electrode penetrating tool 4, 5 Water pipe 6 Wire electrode 7 Reference electrode 8, 9, 10 Lead wire 11 Inner lining coating film 12, 13 Iron exposure part 14 Anode terminal 15 Cathode terminal 16 Reference electrode terminal 17 Comparison unit 18 Amplification unit 19 Control unit

Claims (6)

陽極端子、陰極端子、及び照合電極端子を備える外部電源装置と、前記陰極端子に電気的に接続され、鋼管製の管壁内に内面内張塗膜が施された水道管と、前記陽極端子に電気的に接続されると共に、前記水道管内の管軸方向に、前記水道管と電気的絶縁が図られて配設された線電極と、前記照合電極端子に電気的に接続されると共に、前記水道管の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される照合電極とを備え、前記照合電極端子に対する前記陰極端子の電位を検出し該電位が所定の電位となるように、前記陽極端子から出力される直流電圧を制御することによって、前記水道管内の前記内面内張塗膜における鉄露出部の電気防食を図ることを特徴とする水道管の電気防食システム。   An external power supply device including an anode terminal, a cathode terminal, and a reference electrode terminal, a water pipe electrically connected to the cathode terminal, and having an inner surface lining coating applied to a steel tube wall, and the anode terminal In addition to being electrically connected to the wire electrode in the direction of the tube axis in the water pipe, the wire electrode is disposed so as to be electrically insulated from the water pipe, and is electrically connected to the reference electrode terminal. A collating electrode arranged in electrical insulation from the pipe wall from the pipe wall of the water pipe into the pipe, detecting the potential of the cathode terminal with respect to the collating electrode terminal, The electric corrosion prevention of the water pipe characterized by controlling the direct current voltage output from the anode terminal so as to be an electric potential, thereby preventing the electric corrosion of the iron exposed portion in the inner surface lining film in the water pipe. system. 陽極端子、陰極端子、及び照合電極端子を備える外部電源装置と、前記陰極端子に電気的に接続され、鋼管製の管壁内に内面内張塗膜が施された内側水道管と、該内側水道管の外面に嵌合して継ぎ足すように接続された鋼材製の管内面に内面内張塗膜が施された外側水道管と、前記陽極端子に電気的に接続されると共に、前記内側水道管及び外側水道管内の管軸方向に、前記内側水道管及び外側水道管と電気的絶縁が図られて配設された線電極と、前記照合電極端子に電気的に接続されると共に、前記内側水道管の管壁から管内に向けて、管壁と電気的絶縁が図られて配設される照合電極とを備え、前記照合電極端子に対する前記陰極端子の電位を検出し該電位が所定の電位となるように、前記陽極端子から出力される直流電圧を制御することによって、前記外側水道管内に嵌合している内側水道管の管端における鉄露出部の電気防食を図ることを特徴とする水道管の電気防食システム。   An external power supply device including an anode terminal, a cathode terminal, and a reference electrode terminal, an inner water pipe electrically connected to the cathode terminal, and having an inner surface lining coating applied to a tube wall made of steel pipe, and the inner side An outer water pipe having an inner lining coating applied to the inner surface of a steel pipe connected so as to be fitted and added to the outer surface of the water pipe, and electrically connected to the anode terminal and the inner side In the direction of the pipe axis in the water pipe and the outer water pipe, the wire electrode arranged to be electrically insulated from the inner water pipe and the outer water pipe and electrically connected to the reference electrode terminal, and A collation electrode arranged to be electrically insulated from the pipe wall from the pipe wall of the inner water pipe into the pipe, detecting the potential of the cathode terminal with respect to the collation electrode terminal, The DC voltage output from the anode terminal is controlled so as to be at a potential. By, cathodic protection system of water pipes, characterized in that to achieve cathodic protection of the iron exposed portion at the pipe end of the inner water pipes fitted to the outer water tube. 前記所定の電位が人工海水塩化銀電極基準に基づく−７８０ｍＶ〜−８００ｍＶの範囲内に設定された電位であることを特徴とする請求項１又は請求項２に記載の水道管の電気防食システム。   3. The water pipe electrocorrosion protection system according to claim 1, wherein the predetermined potential is a potential set in a range of −780 mV to −800 mV based on an artificial seawater chloride chloride electrode standard. 前記内面内張塗膜が硬質塩化ビニルライニングであることを特徴とする請求項１ないし請求項３のいずれかに記載の水道管の電気防食システム。   4. The water pipe cathodic protection system according to any one of claims 1 to 3, wherein the inner lining coating film is a hard vinyl chloride lining. 前記内面内張塗膜がエポキシライニングであることを特徴とする請求項１ないし請求項３のいずれかに記載の水道管の電気防食システム。   4. The water pipe cathodic protection system according to any one of claims 1 to 3, wherein the inner lining coating film is epoxy lining. 前記内面内張塗膜が樹脂被膜であることを特徴とする請求項１ないし請求項３のいずれかに記載の水道管の電気防食システム。   4. The cathodic protection system for water pipes according to claim 1, wherein the inner lining coating film is a resin coating.
JP2012000627U 2012-02-07 2012-02-07 Water pipe electric protection system Expired - Fee Related JP3175068U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012000627U JP3175068U (en) 2012-02-07 2012-02-07 Water pipe electric protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012000627U JP3175068U (en) 2012-02-07 2012-02-07 Water pipe electric protection system

Publications (1)

Publication Number Publication Date
JP3175068U true JP3175068U (en) 2012-04-19

Family

ID=48002150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012000627U Expired - Fee Related JP3175068U (en) 2012-02-07 2012-02-07 Water pipe electric protection system

Country Status (1)

Country Link
JP (1) JP3175068U (en)

Similar Documents

Publication Publication Date Title
US20150198518A1 (en) Cathodic protection reference cell article and method
JP2020012189A (en) Sacrificial anode structure, apparatus for determining consumed state of sacrificial anode, and determination method
JP3175068U (en) Water pipe electric protection system
CN205039503U (en) Anticorrosive device of communication pipe
JP5718692B2 (en) Cathodic protection method and cathodic protection system for buried metal pipeline
JP2010138448A (en) Cathodic protection system and cathodic protection method for buried pipeline with the use of galvanic anode system
JP3148038U (en) Water pipe electric protection system
JP6333704B2 (en) External power source cathodic protection device
AU2014301381A1 (en) Fluid-conducting system with cathodic corrosion protection
JP2010047814A (en) Current measurement method and current measurement device for sacrificial anode in electrically conductive liquid
KR101518182B1 (en) A electrode unit for measuring anticorrosion potential of underground metal structure
KR100595391B1 (en) Device of electricity anticorrosion
US20190226095A1 (en) Autonomous impressed current cathodic protection device on metal surfaces with a spiral magnesium anode
JP4968645B2 (en) Terminal mounting structure for corrosion protection of concrete structures
JP2005298953A (en) Electric prevention method for water pipe
JP5718850B2 (en) Cathodic protection system and cathodic protection method for metal structures
JP4741378B2 (en) Electrocorrosion protection method and structure for underground structures
JP2005307272A (en) Electric protection method for water pipe
US7081187B1 (en) Internal cathodic protection system
JP7470852B1 (en) Anticorrosive external electric device and method for cathodic protection of pipeline
KR100997500B1 (en) Anticorrosion system
DE69831503D1 (en) DEVICE FOR CHECKING LEAD-OIL CLEANING
CN215328372U (en) Power plant water inlet chamber anticorrosion control system
KR102652545B1 (en) Impressed current cathodic protection system for pipe
JP2014218731A (en) Cathodic protection of pipeline and cathodic protection device

Legal Events

Date Code Title Description
R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150328

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees