JPH09206679A - Method for lining inner surface of pipe - Google Patents

Method for lining inner surface of pipe

Info

Publication number
JPH09206679A
JPH09206679A JP1644996A JP1644996A JPH09206679A JP H09206679 A JPH09206679 A JP H09206679A JP 1644996 A JP1644996 A JP 1644996A JP 1644996 A JP1644996 A JP 1644996A JP H09206679 A JPH09206679 A JP H09206679A
Authority
JP
Japan
Prior art keywords
pipe
coating
paint
coating film
film
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
JP1644996A
Other languages
Japanese (ja)
Other versions
JP2889525B2 (en
Inventor
Isao Mizuno
勲 水野
Tsutomu Hoshikawa
勤 星川
Tomohiro Ishizawa
朝裕 石澤
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.)
NIPPON SETSUBI KOGYO KK
Original Assignee
NIPPON SETSUBI KOGYO KK
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 NIPPON SETSUBI KOGYO KK filed Critical NIPPON SETSUBI KOGYO KK
Priority to JP8016449A priority Critical patent/JP2889525B2/en
Publication of JPH09206679A publication Critical patent/JPH09206679A/en
Application granted granted Critical
Publication of JP2889525B2 publication Critical patent/JP2889525B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To shorten a time for double coating by forming an undercoat film on the inner surface of a pipe in a primary coating process and a finishing film in a secondary coating process when the undercoat film is in a finger-touch dry condition. SOLUTION: When existing piping such as a water supply pipe to which branch pipes are connected through joint parts 2 is subjected to implementation, in the regeneration of the existing piping, after the discharge member of each branch pipe being removed, dirt such as scale in the existing piping is removed by a polishing means, and the inside is made dry and clean. Next, lining is performed in sequence from the terminal side of the piping toward the base end side. First, enough paint to coat one partitioned section is charged at a stroke and extruded by a compressed air flow, and the inner surface of the pipe is coated with the paint transferred. When the primary coating is finished, a weak air flow is passed to make sure of the air-passage condition, and the paint is dried so that it does not adhere to a finger when touched. After that, a finishing film 6 is formed in a secondary coating process.

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】本発明は、建築物内に配設さ
れている既設給水配管等のパイプにおいて、内部の錆こ
ぶ、スケール等の汚れを除去し研掃した後に、所定の塗
料を変成スラグ流から環状流に吹き伸ばしてパイプ内面
を二回に渡ってライニングする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 pipe such as an existing water supply pipe arranged in a building, after removing stains such as rust and scales on the inside and scouring, and then modifying a predetermined paint. The present invention relates to a method in which a slag flow is blown into an annular flow and the inner surface of the pipe is lined twice.

【0002】[0002]

【従来の技術】パイプ内面を二回に渡ってライニングす
る技術としては、例えば、特公平4ー34463号公報
に開示されたものが従来例として周知である。
2. Description of the Related Art As a technique for lining the inner surface of a pipe twice, for example, the technique disclosed in Japanese Patent Publication No. 4-34463 is well known as a conventional example.

【0003】この従来例の技術は、液状のライニング材
を気流により管内壁面に沿って流動させ、複数の開口部
を有する分岐管路の内壁面をライニングする方法におい
て、先のライニングにおける気流の排出箇所を次のライ
ニングにおけるライニング材及び気流の供給箇所としつ
つ前記ライニング材及び気流の供給箇所とを順次移動さ
せ、分岐管路を形成する管路の全ての開口部を少なくと
も一回前記供給箇所及び排出箇所とすると共に、分岐管
路を形成する全ての管路の内部を同じ回数だけライニン
グ材を往復流動させるライニング方法である。
This prior art technique is a method in which a liquid lining material is caused to flow along an inner wall surface of a pipe by an air flow to line the inner wall surface of a branch conduit having a plurality of openings. While sequentially moving the lining material and the airflow supply location while making the location the lining material and the airflow supply location in the next lining, all the openings of the pipeline forming the branch pipeline are at least once the supply location and This is a lining method in which the lining material is reciprocally flowed the same number of times inside all the pipelines forming the branch pipelines, as well as at the discharge point.

【0004】[0004]

【発明が解決しようとする課題】前記従来例のライニン
グ方法によれば、塗料を往復流動させると言うものであ
るが、この場合の往復流動は、往路で流動させて塗布し
た塗料が乾燥しないうちに、復路の塗料を供給して流動
塗布するというものであり、往路で供給した塗料も復路
で供給した塗料と一緒に流動するようになり、そのよう
な往復流動によっては均一な皮膜は形成できない。
According to the lining method of the prior art, the paint is reciprocally flowed. In this case, the reciprocating flow is performed while the paint applied by flowing in the outward path is not dried. In addition, the paint on the return path is supplied and fluidized, and the paint supplied on the outward path also flows together with the paint supplied on the return path, and a uniform film cannot be formed by such reciprocating flow. .

【0005】つまり、先に供給して塗布した塗料が、流
動状態の内に新たな塗料を供給して二度塗りしても、実
質的に皮膜を厚くしたり均一にしたりすることはできな
いのである。特に、エルボー内に塗布された塗料が未乾
燥の状態にあれば、どの方向から流動させても突き当た
り部分の塗料が押し流されて薄くなり、均一で厚手の皮
膜にならないのである。
That is, even if the coating material previously supplied and applied has a fluid state and a new coating material is supplied and applied twice, the coating film cannot be substantially thickened or made uniform. is there. In particular, if the paint applied to the elbow is in an undried state, the paint at the abutting portion will be washed away and thinned no matter which direction it is made to flow, and a uniform and thick film will not be formed.

【0006】また、この従来例における塗料は、混合噴
射器で供給することから、噴霧状で順次供給されるもの
であり、その粘度は低く流動し易いものであることを考
慮しても、前述のとおり往路で供給した塗料も復路で供
給した塗料と一緒に往復流動して皮膜を形成することが
理解でき、結果的に復路方向の流動によって皮膜が形成
されることと同じであり、やはり前述したとおり厚手の
均一な皮膜は形成できないという問題点を有している。
Further, since the coating material in this conventional example is supplied by a mixing injector, it is sequentially supplied in the form of a spray, and the viscosity is low and it easily flows. It can be understood that the coating material supplied in the outward path flows back and forth together with the coating material supplied in the return path to form a film as described above, and as a result, the film is formed by the flow in the returning path. As described above, there is a problem that a thick and uniform film cannot be formed.

【0007】仮に、前記従来例において、塗装の工程で
区分された経路(A→B、B→C→D、D→E等)毎に
乾燥工程を行うとすれば、一経路毎の乾燥に時間が掛か
り過ぎて、塗装工程の同日施工が実質的にできないとい
う問題点を有している。
If, in the above-mentioned conventional example, the drying process is performed for each of the routes (A → B, B → C → D, D → E, etc.) that are divided in the coating process, the drying is performed for each route. There is a problem that it takes too much time and the coating process cannot be applied on the same day.

【0008】従って、前記従来例においては、特に、錆
の発生し易い分岐部分のエルボまたはチース等の継手部
分において厚手の均一皮膜を同日施工によって形成する
ことに解決しなければならない課題を有している。
Therefore, in the above-mentioned conventional example, there is a problem to be solved particularly in forming a thick uniform coating on the same day at a joint portion such as an elbow or a chase at a branch portion where rust is likely to occur. ing.

【0009】[0009]

【課題を解決するための手段】前記従来例の課題を解決
する具体的手段として本発明は、被処理パイプの内面に
一次塗装工程により下塗り塗膜を形成し、該下塗り塗膜
が指触乾燥状態になったところで二次塗装工程により仕
上げ塗膜を形成することを特徴とするパイプ内面のライ
ニング方法を提供するものであり、塗装工程は、被処理
パイプの長さ及び内径に対応して予め設定された膜厚が
形成できる量の塗料を一括して投入し、該塗料を所定圧
の空気流により変成スラグ流から順次環状流に吹き延ば
して塗膜を形成させること;塗料は、無溶剤型の二液性
エポキシ樹脂塗料であること;下塗り塗膜と仕上げ塗膜
とが、架橋反応により一体の塗膜に形成されること;及
び被処理パイプの分岐点を形成するチースは、二次塗装
工程において直線塗りされるを含むものである。
As a concrete means for solving the above-mentioned problems of the prior art, the present invention forms an undercoat coating film on the inner surface of a pipe to be treated by a primary coating process, and the undercoat coating film is dried by touch. In order to provide a lining method for the inner surface of the pipe, which is characterized by forming a finish coating film by a secondary coating process when the condition is reached, the coating process is performed in advance according to the length and inner diameter of the pipe to be treated. An amount of paint capable of forming a set film thickness is added all at once, and the paint is blown sequentially from the modified slag flow to an annular flow by an air flow of a predetermined pressure to form a coating film; Type two-component epoxy resin coating material; the undercoat coating film and the finish coating film are formed into an integral coating film by a cross-linking reaction; and the cheese forming the branch point of the pipe to be treated is a secondary Straight line in the painting process Is intended to include is Risa.

【0010】一次塗装工程による下塗り塗膜が指触乾燥
状態になった後に、二次塗装工程を行うようにしたこと
により、下塗り塗膜は二次塗装工程による空気流の圧力
を受ても、流動することがなく安定した塗膜状態を維持
し、そして、下塗り塗膜は、二次塗装工程による仕上げ
塗膜との間で架橋反応が促進され、両者が一体の塗膜と
なるのである。また、下塗り塗膜の存在により、二次塗
装工程における空気流での塗料の流れが滑らかに行われ
るようになり、二次塗装工程が比較的短時間で行えるの
である。更に、分岐点のチースが二次塗装工程におい
て、直線塗りされることで、良好な厚手の塗膜が形成で
きるのである。
By performing the secondary coating process after the undercoat coating film in the primary coating process is in a dry state to the touch, the undercoat coating film receives the pressure of the air flow in the secondary coating process. A stable coating film state is maintained without fluidization, and the undercoat coating film promotes a crosslinking reaction with the finish coating film in the secondary coating process, so that both are integrated. In addition, the presence of the undercoat coating film allows the flow of the paint in the air flow in the secondary coating process to be performed smoothly, and the secondary coating process can be performed in a relatively short time. Further, since the teeth at the branch points are linearly coated in the secondary coating step, a good thick coating film can be formed.

【0011】[0011]

【発明の実施の形態】次に本発明を図示の実施例により
更に詳しく説明すると、図1において、1は給水管等の
既設配管であり、該既設配管はエルボまたはチース等の
継手部2を介して複数の支管1a,1b,1c、……が
分岐連結されると共に方向を転換して立ち上げたりして
あり、各支管の端部には一般的に蛇口等の吐出部材が取
り付けられている。なお、Mはメータが取り付けられて
いる端部である。
BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 is an existing pipe such as a water supply pipe, and the existing pipe has a joint portion 2 such as an elbow or a chase. A plurality of branch pipes 1a, 1b, 1c, ... Are branched and connected, and the direction of the branch pipes is changed to stand up. A discharge member such as a faucet is generally attached to the end of each branch pipe. There is. In addition, M is an end to which the meter is attached.

【0012】既設配管の再生を行う場合には、各支管の
吐出部材を取り外した後に、継手部2及び支管1a,1
b,1c、……を含めて既設配管1内は、予め適宜の研
掃手段により錆こぶ、スケール等の汚れが除去され、内
部を乾燥させて清掃した状態にしてある。
When the existing pipe is to be regenerated, the joint portion 2 and the branch pipes 1a, 1 are removed after removing the discharge member of each branch pipe.
The inside of the existing pipe 1 including b, 1c, ... Has been cleaned in advance by removing stains such as rust and scale by an appropriate scouring means and drying the inside.

【0013】このように内部が清掃された状態の既設配
管1において、配管の末端側から基端側(メータが取り
付けられている端部M)に向けて各支管から順次ライニ
ングを行う。この場合に、分岐されている支管毎に一応
区分した状態で行うものであり、例えば支管1aから支
管1bの分岐点X1 までを第1の区間Aとし、支管1b
から支管1cの分岐点X2 までを第2の区間Bとし、以
下順次それに倣って支管cから分岐点X3 までを第3の
区間Cとし、支管1dからメータ取付端部Mまでを第4
の区間Dとして一応区分し、各区分毎に順次ライニング
してゆくのである。
In the existing pipe 1 whose interior has been cleaned in this way, lining is sequentially performed from each branch pipe from the end side of the pipe to the base end side (end portion M where the meter is attached). In this case, the branch pipes are categorized in a tentative manner. For example, the branch pipe 1a to the branch point X 1 of the branch pipe 1b is defined as the first section A, and the branch pipe 1b is used.
To the branch point X 2 of the branch pipe 1c as a second section B, the branch pipe c to the branch point X 3 as a third section C, and the branch pipe 1d to the meter mounting end portion M of the fourth section
The section D is divided into sections, and the sections are sequentially lined.

【0014】このライニングにおいて、蛇口等の吐出部
材が取り外された端部にそれぞれ塗料を供給するための
作業管が取り付けられ、該作業管内に前記区分した一区
間をそれぞれ塗装できる量の塗料を一括して投入し、該
一括して投入した塗料を所定の圧縮した空気流により押
し出し、変成スラグ流動から環状流動に遷移させながら
流動させて塗装するのである。なお、供給される塗料の
量は各区間における配管の管径、管長及び所定の膜厚が
形成されることを予め計算し、計算された量よりも1〜
3割程度多めに投入される。
In this lining, working pipes for supplying paint are attached to the ends from which discharge members such as faucets are removed, and a quantity of paint capable of coating each of the divided sections is collectively packaged in the working pipe. Then, the coating materials that have been supplied all at once are extruded by a predetermined compressed air flow, and the coating is made to flow while transitioning from the modified slag flow to the annular flow. It should be noted that the amount of paint to be supplied is calculated in advance that the pipe diameter, pipe length and predetermined film thickness of the pipe in each section are formed, and the amount of paint is 1 to more than the calculated amount.
About 30% will be added.

【0015】その理由は、だれの部分があったり、或は
継手部分に溜ったりすることで、余分な塗料が必要にな
るのである。
The reason for this is that extra paint is required due to the presence of somebody or the accumulation in the joint.

【0016】そして第1の区間Aを塗装する場合に、支
管1aの自由端部側から塗料を流動させて塗装し、塗
料が分岐点X1 に達したか否かを支管1bの端部におい
て圧力差により検出できる。第1の区間Aの塗装が終了
した後に、第2の区間Bの塗装を行う。この場合も、支
管1bの自由端部側から塗料を流動させて塗装し、分
岐点X2 において、支管1cにより塗料が到達したかど
うかを検出する。
When the first section A is painted, the paint is made to flow from the free end side of the branch pipe 1a to paint, and it is determined at the end of the branch pipe 1b whether or not the paint reaches the branch point X 1 . It can be detected by the pressure difference. After the coating of the first section A is completed, the coating of the second section B is performed. In this case as well, the paint is made to flow from the free end side of the branch pipe 1b for coating, and it is detected at the branch point X 2 whether or not the paint has arrived by the branch pipe 1c.

【0017】このようにして第3の区間Cも支管1cの
自由端部から塗料を供給して分岐点X3 まで塗装し、
最後に第4の区間Dは、支管1dの自由端部から塗料
を供給してメータ取付端部Mまで塗装する。いづれの区
間においても、分岐点をわずかに超えた状態で塗装がな
される。
In this way, also in the third section C, paint is supplied from the free end of the branch pipe 1c to the branch point X 3 , and
Finally, in the fourth section D, paint is supplied from the free end of the branch pipe 1d to the meter mounting end M. In each section, the coating is done slightly beyond the branch point.

【0018】前記した一次塗装は、メータ取付端部Mか
ら遠い順にメータ取付端部M側に向かって順次塗装する
ものであり、メータ取付端部M側を開放し、他の支管1
a〜1dは、塗料が供給されるものを除いて全部閉鎖状
態にして塗装する。勿論、メータ取付端部M側には塗料
回収部材が取り付けられることは言うまでもない。
The above-mentioned primary coating is applied in order from the meter mounting end M toward the meter mounting end M side. The meter mounting end M side is opened and the other branch pipe 1
All of a to 1d are coated in a closed state except the one to which the paint is supplied. Of course, it goes without saying that the paint collecting member is attached to the meter attachment end M side.

【0019】一次塗装が終了した後に、各支管側から弱
い空気流を流して通気状態を確認すると共に、塗膜を乾
燥させる。この乾燥は完全乾燥ではなく、所謂、指触乾
燥であり、指で触った時に塗料が指に付着しない程度に
乾燥した状態である。このような状態になれば、塗装の
ための空気流ではほとんど流動しない。
After the completion of the primary coating, a weak air flow is made to flow from each branch pipe side to check the ventilation state and the coating film is dried. This drying is not complete drying but so-called finger-drying, which is a state in which the coating material is so dry that it does not adhere to the finger when touched with the finger. In such a state, the air flow for painting hardly flows.

【0020】一次塗装の塗膜が指触乾燥した後に、二次
塗装を行う。この場合に、変則的ではあるが、各支管の
分岐点毎に塗装を行う。即ち、支管1aは実質的にX3
で分岐されているので、メータ取付部Mから一番遠い分
岐点X1 で分岐されている支管1bから塗装を行う。つ
まり、支管1bの自由端部から分岐点X1 までを塗装
する。この分岐点に塗料が到達したか否かは、支管1a
の自由端部の圧力変動を検出することによりチェック
できる。
After the coating film of the primary coating is dry to the touch, the secondary coating is performed. In this case, although irregular, coating is performed at each branch point of each branch pipe. That is, the branch pipe 1a is substantially X 3
Since it is branched at, the coating is performed from the branch pipe 1b branched at the branch point X 1 farthest from the meter mounting portion M. That is, the area from the free end of the branch pipe 1b to the branch point X 1 is painted. Whether or not the paint has reached this branch point depends on the branch pipe 1a.
It can be checked by detecting the pressure fluctuation at the free end of the.

【0021】続いて支管1cの自由端部から分岐点X
2 までを塗装する。この分岐点に塗料が到達したか否か
は、支管1bの自由端部又は支管1aの自由端部に
おいてチェックできる。次に支管1aの自由端部から
分岐点X3 までのエルボ及びチースを含む直線部分を一
気に塗装する。この分岐点X3 に塗料が到達したか否か
は、支管1dの自由端部においてチェックできる。そ
して、最後に支管1dの自由端部からメータ取付端部
Mまでを塗装するのである。
Then, from the free end of the branch pipe 1c to the branch point X
Paint up to 2 . Whether or not the paint has reached this branch point can be checked at the free end of the branch pipe 1b or the free end of the branch pipe 1a. Next, the straight line portion including the elbow and the chase from the free end of the branch pipe 1a to the branch point X 3 is painted all at once. Whether or not the paint has reached this branch point X 3 can be checked at the free end of the branch pipe 1d. Finally, the free end of the branch pipe 1d to the meter mounting end M is painted.

【0022】このように各支管の分岐点までを対象にし
て塗装を行うことにより、分岐点を形成するチース部分
が、いづれも直線塗りになることで比較的厚手で均一な
塗膜が形成できるのである。
By applying the coating up to the branch points of the branch pipes in this way, the cheeth portions forming the branch points are each linearly coated, so that a relatively thick and uniform coating film can be formed. Of.

【0023】これら二次塗装においても、前記一次塗装
と略同じ条件で塗装するものであって、塗装しようとす
る区間の管径、管長及び塗膜厚さ等を予め計算して塗料
の量を決定し、2〜4割程度多めに投入し、圧縮空気流
により変成スラグ流動から環状流動に遷移させながら流
動させて塗装するのである。
In these secondary coatings as well, the coating is performed under substantially the same conditions as in the primary coating, and the pipe diameter, pipe length, coating thickness, etc. of the section to be coated are calculated in advance to determine the amount of coating. It is determined and added in an amount of about 20 to 40% more, and the coating is made to flow while transitioning from the metamorphic slag flow to the annular flow by the compressed air flow.

【0024】この二次塗装においては、同じ塗料を使用
しても、先に一次塗装がなされていることから、分岐点
及び直管部も含めて塗料の流動が速くなり一次塗装より
も短時間で塗装ができるようになる。従って、塗装時間
が短くなることで空気流による塗料の吹き伸ばしが少な
くなって、全体的に厚手の塗膜が形成される。
In this secondary coating, even if the same coating is used, the primary coating is applied first, so that the flow of the coating including the branch point and the straight pipe portion is faster, and the coating is shorter than the primary coating. Now you can paint. Therefore, by shortening the coating time, the spread of the coating material by the air flow is reduced, and a thick coating film is formed as a whole.

【0025】このように一次塗装と二次塗装とを行うこ
とにより、図2及び図3に示したように、配管における
エルボ3及びチース4等の継手部分2においても塗装状
態が良好なものとなるのである。
By carrying out the primary coating and the secondary coating in this way, as shown in FIG. 2 and FIG. 3, the joint portion 2 such as the elbow 3 and the chase 4 in the pipe can be coated well. It will be.

【0026】即ち、これらエルボ3及びチース4の部分
においては、一次塗装による下塗り塗膜5の表面に二次
塗装による仕上げ塗膜6が重々して一体化し、特にエル
ボ3においては、その湾曲している外側膨らみ部分の内
側の所定のエリア3aは、いずれの方向から空気流が来
ても突き当たり部分となるので、そのエリア3aに付着
(塗装)した塗料は、突き当たる強い空気流によって吹
き飛ばされ易いため、厚く塗装できない部分である。
That is, in the elbow 3 and the cheath 4, the finish coating film 6 formed by the secondary coating is overlapped and integrated on the surface of the undercoat coating film 5 formed by the primary coating, and especially the elbow 3 is curved. The predetermined area 3a on the inside of the outer bulging portion becomes the abutting portion regardless of the direction of the air flow, so that the paint adhered (painted) to the area 3a is easily blown off by the strong air flow that abuts. Because of this, it is a thick part that cannot be painted.

【0027】また、チース4に関しては、T字状の頂部
に対応するエリア4aの部分も、支管(1b,1c)側
から供給された空気流が突き当たる部分であって、その
エリア4aの部分においても厚い塗膜が形成され難い。
With respect to the cheese 4, the portion of the area 4a corresponding to the T-shaped top portion is also the portion against which the airflow supplied from the branch pipes (1b, 1c) side abuts, and in that portion of the area 4a. It is difficult to form a thick coating film.

【0028】しかしながら、これらのエリア3a,4a
においても、一次塗装による下塗り塗膜5と二次塗装に
よる仕上げ塗膜6とによって所定の厚みの塗膜が得られ
るようになる。つまり、一次塗装工程を終了した後に、
指触乾燥させた下塗り塗膜5の上に、二次塗装工程によ
って仕上げ塗膜6が重ね塗りされることで、両塗膜の和
により所定の厚みの塗膜になる。特に、チース4の部分
については、二次塗装において、直線塗りとなるため比
較的無理なく厚手の塗膜が形成され、耐蝕性に優れたも
のとなる。
However, these areas 3a, 4a
Also in the above, the undercoat coating film 5 formed by the primary coating and the finish coating film 6 formed by the secondary coating provide a coating film having a predetermined thickness. In other words, after finishing the primary coating process,
The finish coating film 6 is overcoated by the secondary coating process on the undercoat coating film 5 that has been dried by touch with the finger, so that the sum of both coating films provides a coating film having a predetermined thickness. In particular, in the case of the cheath 4, a thick coating film is relatively reasonably formed because of the straight coating in the secondary coating, and the corrosion resistance is excellent.

【0029】この場合に、図示の実施例では理解を容易
にするため、下塗り塗膜5と仕上げ塗膜6とを区別して
表しているが、下塗り塗膜5は指触乾燥程度であって完
全に乾燥した状態ではないので、二次塗装による仕上げ
塗膜6との間で架橋反応が促進され、実質的に下塗り塗
膜5と仕上げ塗膜6との間に境界が生ずることなく、両
者が略一体になって一枚の塗膜として形成されるように
なる。
In this case, in order to facilitate understanding in the illustrated embodiment, the undercoat coating film 5 and the finish coating film 6 are shown separately, but the undercoat coating film 5 is dry to the touch and completely Since it is not in a dry state, the cross-linking reaction is promoted between the secondary coating and the finish coating film 6, and there is substantially no boundary between the undercoat coating film 5 and the finish coating film 6. It becomes almost integrated and is formed as one coating film.

【0030】ここで使用される塗料は、無溶剤型の主剤
と硬化剤とからなる二液性エポキシ樹脂塗料が好まし
い。そして、主剤と硬化剤とを混合させると架橋反応が
促進されるが、所定の時間経過後にライニングを行う。
この場合の所定時間とは、塗料の粘度及びTi値にもよ
るが、例えば10〜30分程度の範囲である。
The paint used here is preferably a two-part epoxy resin paint comprising a solvent-free base material and a curing agent. Then, the crosslinking reaction is promoted when the main agent and the curing agent are mixed, but the lining is performed after a predetermined time has elapsed.
The predetermined time in this case is, for example, in the range of about 10 to 30 minutes, although it depends on the viscosity and the Ti value of the paint.

【0031】いずれにしても、ライニングしようとする
所定長さの配管に対して、一次塗装工程と二次塗装工程
とを行って予定した所定厚さの塗膜を形成するものであ
り、一次塗装工程によって形成された塗膜が指触乾燥状
態になったときに、二次塗装を行うものであり、それに
よって二回塗りであっても塗装時間及び作業が著しく短
縮でき、同日施工が可能になるのである。
In any case, a primary coating process and a secondary coating process are performed on a pipe of a predetermined length to be lined to form a coating film of a predetermined thickness, which is a primary coating process. Secondary coating is performed when the coating film formed by the process becomes dry to the touch, which can significantly reduce the coating time and work even with double coating, enabling the same day construction. It will be.

【0032】[0032]

【発明の効果】以上説明したように、本発明に係るパイ
プ内面のライニング方法は、被処理パイプの内面に一次
塗装工程により下塗り塗膜を形成し、該下塗り塗膜が指
触乾燥状態になったところで二次塗装工程により仕上げ
塗装を行うようにしたものであって、下塗り塗装が指触
乾燥していることで、二次塗装工程を行っても、二次塗
装の空気流により下塗り塗膜は流動することなく安定し
ており、その上に二次塗装工程による仕上げ塗膜が形成
されることで、予定した膜厚の塗膜が得られるばかりで
なく、二回塗りであっても塗装時間または作業時間が著
しく短縮され、それによってパイプ内面のライニング
が、同日施工で行えるという優れた効果を奏する。
As described above, according to the pipe inner surface lining method of the present invention, an undercoat coating film is formed on the inner surface of a pipe to be treated by a primary coating process, and the undercoat coating film is in a touch-free state. By the way, the finish coating is done by the secondary coating process, and since the undercoat coating is dry to the touch, even if the secondary coating process is carried out, the undercoat coating film is still produced by the air flow of the secondary coating. Is stable and does not flow, and a finish coating film is formed on it by the secondary coating process, so not only the coating film of the intended film thickness can be obtained, but also the coating can be done even by double coating. The time or working time is remarkably shortened, so that the lining of the pipe inner surface can be performed on the same day, which is an excellent effect.

【0033】また、下塗り塗装の塗膜が指触乾燥状態に
おいて仕上げ塗装の塗膜を重ね塗りすることにより、両
塗膜間で架橋反応が促進され両者が一体の塗膜になると
いう優れた効果を奏する。
Further, by superimposing the coating film of the finish coating on the coating film of the undercoating in a dry state to the touch, the cross-linking reaction between the coating films is promoted and the coating film becomes an integral effect. Play.

【0034】更に、既設配管、即ち被処理パイプの分岐
点を形成するチース部分は、二次塗装工程において直線
塗りされることにより、良好な厚手の塗膜が形成できる
という優れた効果を奏する。
Further, the existing pipe, that is, the portion forming the branch point of the pipe to be treated is linearly coated in the secondary coating step, so that a good thick coating film can be formed.

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

【図1】本発明に係るパイプ内面のライニング方法を説
明するための既設配管の状態を略示的に示した設明図で
ある。
FIG. 1 is an explanatory view schematically showing a state of an existing pipe for explaining a pipe inner surface lining method according to the present invention.

【図2】同ライニング方法によってライニングされる既
設配管のエルボ部分を拡大して示した断面図である。
FIG. 2 is an enlarged sectional view showing an elbow portion of an existing pipe lined by the lining method.

【図3】同ライニング方法によってライニングされる既
設配管のチース部分を拡大して示した断面図である。
FIG. 3 is a cross-sectional view showing, in an enlarged manner, a cheese portion of an existing pipe lined by the lining method.

【符号の説明】[Explanation of symbols]

1 既設配管 1a,1b,1c,1d 支管 2 継手部分 3 エルボ 3a,4a エリア 4 チース 5 下塗り塗膜 6 仕上げ塗膜 A,B,C,D 一応区分した区間 X1 〜X3 分岐点1 Existing piping 1a, 1b, 1c, 1d Branch pipe 2 Joint part 3 Elbow 3a, 4a Area 4 Cheese 5 Undercoat coating film 6 Finish coating film A, B, C, D Temporarily divided section X 1 to X 3 Branch points

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 被処理パイプの内面に一次塗装工程によ
り下塗り塗膜を形成し、該下塗り塗膜が指触乾燥状態に
なったところで二次塗装工程により仕上げ塗膜を形成す
ることを特徴とするパイプ内面のライニング方法。
1. An undercoat coating film is formed on the inner surface of a pipe to be treated by a primary coating process, and a finish coating film is formed by a secondary coating process when the undercoat coating film is dry to the touch. How to lining the inner surface of the pipe.
【請求項2】 塗装工程は、被処理パイプの長さ及び内
径に対応して予め設定された膜厚が形成できる量の塗料
を一括して投入し、該塗料を所定圧の空気流により変成
スラグ流から順次環状流に吹き延ばして塗膜を形成させ
ることを特徴とする請求項1に記載のパイプ内面のライ
ニング方法。
2. In the coating step, a quantity of paint capable of forming a film thickness set in advance corresponding to the length and inner diameter of the pipe to be treated is put all at once, and the paint is transformed by an air flow of a predetermined pressure. 2. The pipe inner surface lining method according to claim 1, wherein the coating film is formed by sequentially blowing the slag flow into an annular flow.
【請求項3】 塗料は、無溶剤型の二液性エポキシ樹脂
塗料である請求項1または2に記載のパイプ内面のライ
ニング方法。
3. The pipe inner surface lining method according to claim 1, wherein the paint is a solventless two-part epoxy resin paint.
【請求項4】 下塗り塗膜と仕上げ塗膜とが、架橋反応
により一体の塗膜に形成されることを特徴とする請求項
1に記載のパイプ内面のライニング方法。
4. The pipe inner surface lining method according to claim 1, wherein the undercoat coating film and the finish coating film are formed into an integral coating film by a crosslinking reaction.
【請求項5】 被処理パイプの分岐点を形成するチース
は、二次塗装工程において直線塗りされる請求項1に記
載のパイプ内面のライニング方法。
5. The pipe inner surface lining method according to claim 1, wherein the teeth forming the branch points of the pipe to be treated are linearly coated in the secondary coating step.
JP8016449A 1996-02-01 1996-02-01 Lining method of pipe inner surface Expired - Lifetime JP2889525B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8016449A JP2889525B2 (en) 1996-02-01 1996-02-01 Lining method of pipe inner surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8016449A JP2889525B2 (en) 1996-02-01 1996-02-01 Lining method of pipe inner surface

Publications (2)

Publication Number Publication Date
JPH09206679A true JPH09206679A (en) 1997-08-12
JP2889525B2 JP2889525B2 (en) 1999-05-10

Family

ID=11916563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8016449A Expired - Lifetime JP2889525B2 (en) 1996-02-01 1996-02-01 Lining method of pipe inner surface

Country Status (1)

Country Link
JP (1) JP2889525B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040021496A (en) * 2002-09-04 2004-03-10 정송옥 Water works pipe rebirth epoxy resin lining before priming method of construction and composition of epoxy resin paint
CN105562402A (en) * 2016-01-11 2016-05-11 广东生益科技股份有限公司 Pipeline cleaning method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040021496A (en) * 2002-09-04 2004-03-10 정송옥 Water works pipe rebirth epoxy resin lining before priming method of construction and composition of epoxy resin paint
CN105562402A (en) * 2016-01-11 2016-05-11 广东生益科技股份有限公司 Pipeline cleaning method

Also Published As

Publication number Publication date
JP2889525B2 (en) 1999-05-10

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