JPH0653246B2 - Method and apparatus for lining inner surface of metal tube - Google Patents
Method and apparatus for lining inner surface of metal tubeInfo
- Publication number
- JPH0653246B2 JPH0653246B2 JP63019369A JP1936988A JPH0653246B2 JP H0653246 B2 JPH0653246 B2 JP H0653246B2 JP 63019369 A JP63019369 A JP 63019369A JP 1936988 A JP1936988 A JP 1936988A JP H0653246 B2 JPH0653246 B2 JP H0653246B2
- Authority
- JP
- Japan
- Prior art keywords
- lining
- closed chamber
- pipe
- powder
- resin
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 12
- 239000000843 powder Substances 0.000 claims description 66
- 239000011347 resin Substances 0.000 claims description 55
- 229920005989 resin Polymers 0.000 claims description 55
- 238000003756 stirring Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 21
- 239000010959 steel Substances 0.000 description 21
- 238000007789 sealing Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 101150096674 C20L gene Proteins 0.000 description 1
- 102220543923 Protocadherin-10_F16L_mutation Human genes 0.000 description 1
- 101100445889 Vaccinia virus (strain Copenhagen) F16L gene Proteins 0.000 description 1
- 101100445891 Vaccinia virus (strain Western Reserve) VACWR055 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
- Paints Or Removers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、防食のため金属管の内面の一部に粉体樹脂を
ライニングする方法およびその装置に関するものであ
る。TECHNICAL FIELD The present invention relates to a method and an apparatus for lining a part of an inner surface of a metal tube with powder resin for corrosion protection.
従来、この種の、溶接継手で接合されている金属管の溶
接部内面に粉体樹脂をライニングして防食する方法は、
例えば特開昭６０−１１０３６８号公報、特開昭６０−
２２２１７７号公報および特公昭６２−２７８６９号公
報などで紹介されている。すなわち、これらの公報に紹
介されている技術は、金属管におけるライニング防食層
を形成しようとする部位（特に、溶接継手の部分）の近
傍の管外周に加熱装置を巻き付け、その部位の管体を加
熱し、一方、金属管内にライニング装置を進入させた
後、当該部位を挟んで管内を密閉し、この閉塞室内に粉
体樹脂をコンプレッサより、充填または散布する。次
に、密閉室内に充填または散布した粉体樹脂が金属管内
面に加熱融着した後、余剰の粉体樹脂を回収ホースによ
り回収し、その後、ライニング装置を管外へ退去する。
次いで、前記加熱装置で再加熱し、仕上融着をするもの
である。Conventionally, this type of method for lining the inner surface of the welded part of the metal pipe joined by a welded joint with a powdered resin to prevent corrosion is
For example, JP-A-60-110368 and JP-A-60-
It is introduced in JP-B-222177 and JP-B-62-27869. That is, the techniques introduced in these publications are such that a heating device is wound around the pipe outer periphery in the vicinity of a portion (particularly, a welded joint portion) where a lining anticorrosive layer is to be formed in a metal pipe, and On the other hand, after heating, the lining device is introduced into the metal tube, the inside of the tube is sealed by sandwiching the site, and powder resin is filled or sprayed from the compressor in the closed chamber. Next, after the powder resin filled or scattered in the closed chamber is heated and fused to the inner surface of the metal tube, the excess powder resin is recovered by the recovery hose, and then the lining device is withdrawn outside the tube.
Then, it is reheated by the heating device to perform final fusion.
しかしながら、かかる粉体樹脂のライニング方法では、
粉体樹脂を密閉室へ供給する供給装置や余剰の粉体樹脂
を回収する回収装置を必要とし、それだけライニング装
置が複雑化し、かつ高価となる。しかも、これらの粉体
樹脂の供給および回収量が不確実となり、ひいてはライ
ニング層が不均一になるおそれがある。また、かかるラ
イニング方法では、例えば、特開昭６０−１１０３６８
号公報で示されているように、４０分間も加熱し、粉体
樹脂を加熱融着した後、再び仕上融着のため再加熱を行
っているが、本来、樹脂ライニング層は熱履歴時間によ
り劣化するので、かかる加熱はライニング防食層にとっ
ては好ましくない。However, in such a powder resin lining method,
A supply device for supplying the powder resin to the closed chamber and a recovery device for recovering the surplus powder resin are required, and the lining device becomes complicated and expensive. In addition, the supply and recovery amounts of these powder resins may become uncertain, and the lining layer may become non-uniform. Further, in such a lining method, for example, JP-A-60-110368 is used.
As shown in the publication, after heating for 40 minutes to heat and fuse the powder resin, reheating is performed again for finish fusion, but originally, the resin lining layer depends on the heat history time. Such heating is undesirable for the lining anticorrosion layer as it deteriorates.
そこで本発明は、かかる諸問題を一挙に解決するため創
作されたもので、その要旨とするところは、１）ライニ
ング防食層を形成しようとする固定された金属管の一部
管内周面の被処理部位を、１対の管内閉塞治具により形
成した閉塞室で囲み、この被処理部位を管外より加熱す
るとともに、この閉塞室へ粉体樹脂を散布して、当該被
処理部位にライニング防食層を形成するにあたり、予
め、該被処理部位を所定温度に保持させておき、次い
で、前記閉塞室内で高速回転し、かつ、管内周面に接近
した撹拌羽根により形成された乱のない高速空気流に、
前記閉塞室内に予め格納されている一定量粉体容器中の
粉体樹脂のみを管内周面に向け散布しながら、混入する
ことにより、ライニング防食層を短時間に形成させるこ
とを特徴とする金属管の内面ライニング方法にあり、ま
た、２）ライニング防食層を形成しようとする固定され
た金属管の一部管内周面の被処理部位を、１対の管内閉
塞治具により形成した閉塞室で囲み、この被処理部位を
管外に加熱装置を設け、この閉塞室へ粉体樹脂を散布す
るためのライニング装置を格納した金属管の内面ライニ
ング装置において、該ライニング装置を管軸方向に横架
した回転軸と、該回転軸に設けられ、遠心力で若干量流
出するよう形成され、かつ粉体樹脂を一定量収容する粉
体ホッパと、該回転軸に設けた攪拌羽根と、からなる金
属管の内面ライニング装置にあり、また、３）ライニン
グ装置を管軸方向に横架し、かつ一定量の粉体樹脂を若
干量流出火可能にした中空回転軸と、該回転軸に設けた
攪拌羽根と、からなる請求項(2)に記載の金属管の内面
ライニング装置にある。Therefore, the present invention was created in order to solve such problems at once, and the gist of the invention is as follows: 1) A part of a fixed metal pipe on which a lining anticorrosive layer is to be formed is coated on the inner peripheral surface of the pipe. The treated area is surrounded by a closed chamber formed by a pair of in-pipe closing jigs, the treated area is heated from outside the pipe, and the powdered resin is sprayed to the closed chamber to protect the treated area from lining corrosion. In forming the layer, the treated part is held at a predetermined temperature in advance, and then is rotated at a high speed in the closed chamber and is a high-speed air without disturbance formed by a stirring blade close to the inner peripheral surface of the pipe. In style
A metal for forming a lining anticorrosion layer in a short time by spraying only a certain amount of powder resin in a powder container, which is stored in advance in the closed chamber, toward the inner peripheral surface of the pipe to mix the powder resin. In the method of lining the inner surface of the pipe, and 2) a part of the inner surface of the fixed metal pipe on which the lining anticorrosion layer is to be formed is treated with a closed chamber formed by a pair of pipe closing jigs. In the inner lining device of the metal pipe, which encloses this treated area outside the pipe, and which houses the lining device for spraying the powdered resin to the closed chamber, the lining device is horizontally extended in the pipe axial direction. A rotating shaft, a powder hopper provided on the rotating shaft so as to flow out slightly by centrifugal force, and containing a fixed amount of powder resin, and a stirring blade provided on the rotating shaft. Inner surface of tube And a 3) a hollow rotating shaft which lays the lining device horizontally in the pipe axis direction and allows a certain amount of powdered resin to flow out slightly, and a stirring blade provided on the rotating shaft. The inner surface lining device for a metal pipe according to claim (2).
第１の本発明の金属管の内面ライニング方法および第２
の本発明のその装置を、これらの実施例装置について詳
細に説明する。A first method for lining the inner surface of a metal pipe of the present invention and a second method
The apparatus of the present invention will now be described in detail with respect to these example devices.
第１図は本発明の第１の実施例装置の縦断面図、第２図
は第１図のＡ〜Ａ断面図、第３図は第１図の攪拌羽根の
側面図、第４図は第１図の補助攪拌羽根の動作用断面
図、第５図は他の実施例装置の縦断面図である。1 is a longitudinal sectional view of a first embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a side view of the stirring blade of FIG. 1, and FIG. FIG. 1 is a sectional view for operating the auxiliary stirring blade of FIG. 1, and FIG. 5 is a longitudinal sectional view of an apparatus of another embodiment.
これらの図において、現地で布設配管され、固定された
鋼管１，１′はＡ〜Ａ断面部において溶接され一体化し
ている。これらの鋼管１，１′のライニング防食層２，
２′は現地溶接以前に工場などですでにライニングされ
た防食層で、この防食層２，２′は第１図中Ｂ〜Ｂ′の
範囲で全内周に亘り塗り残されている。３は、このＢ〜
Ｂ′の範囲より若干幅広い範囲で、鋼管１，１′を外周
面から所定の温度に加熱昇温させる加熱装置で、この加
熱装置３としては誘導加熱、ガスバーナ、赤外線ヒータ
および電熱ヒータなど、いずれのものでもよい。In these figures, the steel pipes 1 and 1'which have been laid and fixed on site are welded and integrated at the AA cross section. Lining anticorrosion layer 2 of these steel pipes 1, 1 '
Reference numeral 2'denotes an anticorrosion layer which has already been lined in a factory before on-site welding. The anticorrosion layers 2 and 2'are left uncoated over the entire inner circumference in the range of B to B'in FIG. 3 is this B ~
A heating device that heats and raises the steel pipes 1 and 1'from the outer peripheral surface to a predetermined temperature in a range slightly wider than the range B '. Examples of the heating device 3 include induction heating, gas burner, infrared heater and electric heater. It may be one.
４は４輪からなる車輪で、鋼管１，１′の内面を転動可
能とし、しかもも台車５を支持している。この台車５に
は回転軸８が軸受９，９′により回転自在に軸支されて
いる。この回転軸８は、正逆転可能のモータ６ａ、駆動
減速装置６および伝動チェーン７により駆動されるよう
になっている。Reference numeral 4 denotes a wheel composed of four wheels, which enables rolling of the inner surfaces of the steel pipes 1 and 1'and also supports the carriage 5. A rotating shaft 8 is rotatably supported on the carriage 5 by bearings 9 and 9 '. The rotating shaft 8 is driven by a motor 6a capable of rotating in the forward and reverse directions, a drive reduction device 6 and a transmission chain 7.
また、この回転軸８には、メニカルシール等のシール１
０，１０′を介して支持円板１１，１１′が非回転状態
で支持されており、この支持円板１１，１１′の外周に
はシール用チューブ１２，１２′が巻設されている。こ
のシール用チューブ１２，１２′は、エアまたは水を注
入し、膨張させてライニング防食層２，２′に内面に圧
着固定し内面シールをするようにしている。そして、こ
れらのシール１０、支持円板１１およびシール用チュー
ブ１２からなる管内面閉塞治具１３の１対で、溶接され
たＡ〜Ａ断面の近傍を密閉し、閉塞室１３〜１３′を形
成している。The rotary shaft 8 has a seal 1 such as a mechanical seal.
Support discs 11 and 11 'are supported in a non-rotating state via 0 and 10', and sealing tubes 12 and 12 'are wound around the outer peripheries of the support discs 11 and 11'. Air or water is injected into the sealing tubes 12 and 12 'to expand the sealing tubes 12 and 2', and the inner surfaces of the sealing tubes 12 and 12 'are pressure-bonded and fixed to the lining anticorrosive layers 2 and 2'. Then, a pair of pipe inner surface closing jigs 13 including the seal 10, the support disk 11, and the sealing tube 12 closes the welded A to A cross section to form closed chambers 13 to 13 '. is doing.
更に、この回転軸８には左右側に山形鋼からなる数対の
アーム１４，１４′…が取付けられ、その左右１対には
粉体容器である粉体ホッパ１６、残る一部の数対には攪
拌羽根１５，１５′…が設けられ、更に他の数対には攪
拌補助羽根２１，２１′…が設けられている。Further, a plurality of pairs of arms 14, 14 'made of chevron steel are attached to the left and right sides of the rotary shaft 8, and a powder hopper 16 which is a powder container is attached to the left and right pairs, and a few remaining pairs. Are provided with agitation blades 15, 15 '..., and further a few pairs of agitation auxiliary blades 21, 21' ... Are provided.
１７は台車５並びに回転軸８を駆動させるための動力
源、２３はシール用チューブ１２，１２′にエアまたは
水を注入するためのホースをそれぞれ表す。Reference numeral 17 denotes a power source for driving the carriage 5 and the rotary shaft 8, and 23 denotes a hose for injecting air or water into the sealing tubes 12, 12 '.
なお、１９は本実施例装置により形成されたライニング
防食層を示す。Reference numeral 19 indicates a lining anticorrosive layer formed by the apparatus of this embodiment.
前記粉体ホッパ１６には、第２図に示すように、閉塞室
１３の容積に比べ若干の容積を占める粉体樹脂１８の所
要量のみを収容するようになっており、この粉体ホッパ
１６の放射状外向き散布口はスリット２０が形成され、
このスリット２０のスキマは、粉体ホッパ１６自身が回
転するため、粉体樹脂１８に遠心力が発生することから
１mm程度とする。しかしながら、かかる１mm程度のスキ
マであっても数秒の内に粉体樹脂１８を排出するので、
粉体樹脂１８の融着速度量より若干多い排出量に抑制す
るため、粉体ホッパ１６内には多孔状邪魔板２２を設け
ている。なお、スリット２０を多孔状にして排出を更に
抑制してもよい。As shown in FIG. 2, the powder hopper 16 is designed to accommodate only a required amount of the powder resin 18 which occupies a small volume as compared with the closed chamber 13. Slits 20 are formed in the radial outward spout of
The clearance of the slit 20 is set to about 1 mm because the powder hopper 16 itself rotates and a centrifugal force is generated in the powder resin 18. However, since the powder resin 18 is discharged within a few seconds even with such a clearance of about 1 mm,
A porous baffle plate 22 is provided in the powder hopper 16 in order to suppress the discharge amount which is slightly higher than the fusion rate of the powder resin 18. The slit 20 may be made porous to further suppress the discharge.
前記攪拌羽根１５は、第１図、第２図および第３図に示
すように、粉体樹脂１８を鋼管１，１′の内面に均等に
散布させるため、管底に堆積した粉体樹脂１８を巻きあ
げるためと、更に攪拌による風速を抑えるために、つま
り、最適な高速空気流を形成するために多孔板で構成さ
れている。また、攪拌羽根１５の先端と管内面との間隙
ｄは過大にすると、その機能を果たさない。実験によれ
ば、その間隙ｄは１０〜２０mmがよい。なお、この場
合、攪拌羽根１５の管軸方向の幅は約１００mmが適当で
あった。As shown in FIG. 1, FIG. 2 and FIG. 3, the agitating blade 15 has the powder resin 18 deposited on the bottom of the pipe in order to evenly disperse the powder resin 18 on the inner surface of the steel pipe 1, 1 ′. It is composed of a perforated plate in order to wind up and to further suppress the wind speed due to stirring, that is, to form an optimum high-speed air flow. If the gap d between the tip of the stirring blade 15 and the inner surface of the tube is too large, it will not function. According to experiments, the gap d is preferably 10 to 20 mm. In this case, it is appropriate that the width of the stirring blade 15 in the tube axis direction is about 100 mm.
前記補助攪拌羽根２１は、第２図および第４図に示すよ
うに、断面Ｙ字状に構成され、その幅ｌは攪拌羽根１５
の幅と同一とし、また、回転軸８の回転数が３５０rpm
の場合には、深さＷは５０mmが最適であった。As shown in FIGS. 2 and 4, the auxiliary stirring blade 21 has a Y-shaped cross section, and the width 1 thereof is equal to that of the stirring blade 15.
The width of the rotating shaft 8 is 350 rpm.
In the case of, the depth W was optimally 50 mm.
本実施例装置の動作は次のようである。すなわち、鋼管
１，１′の樹脂ライニングされていないＢ〜Ｂ′の範囲
を自動研掃装置または手動研掃装置により素地処理を行
う。次いで、溶接接合されたＡ〜Ａ断面の近傍におい
て、鋼管１，１′の外周面から加熱装置３でもって所定
の温度に昇温保持する。同時に自走する台車５を一方の
管端より進入させ、適宜の溶接継目位置検知装置（実開
昭５９−１４０５９号公報参照）により、Ａ〜Ａ断面の
位置に停止させる。このとき、奔体ホッパ１６内にはラ
イニング防食層１９を形成すべきＢ〜Ｂ′の範囲に必要
なだけの粉体樹脂１８の量を収容しておく。また、スリ
ット２０は台車５の進入中に粉体樹脂１８が振動落下し
ないように上向きに位置させておく。台車５を所定位置
で停止させ、エアまたは水を注入してシール用チューブ
１２，１２′を膨張させ、ライニング防食層２，２′の
内面に圧着固定し、内面シールを施すとともに、回転軸
８の振動をも防止しておく。The operation of the apparatus of this embodiment is as follows. That is, the area of B to B ', which is not resin-lined, of the steel pipes 1 and 1'is subjected to the base treatment by an automatic blasting / cleaning device or a manual blasting / cleaning device. Next, in the vicinity of the A-A cross section welded and joined, the temperature is maintained at a predetermined temperature from the outer peripheral surface of the steel pipe 1, 1 ′ by the heating device 3. At the same time, the trolley 5 which is self-propelled is made to enter from one pipe end and stopped at the position of the AA cross section by an appropriate welding seam position detection device (see Japanese Utility Model Laid-Open No. 59-14059). At this time, the amount of the powdered resin 18 required in the range B to B ′ where the lining anticorrosive layer 19 is to be formed is stored in the case hopper 16. Further, the slit 20 is positioned upward so that the powder resin 18 does not vibrate and drop while the carriage 5 is entering. The carriage 5 is stopped at a predetermined position, air or water is injected to expand the sealing tubes 12 and 12 ', and they are pressure-bonded and fixed to the inner surfaces of the lining anticorrosion layers 2 and 2', and the inner surface is sealed, and the rotary shaft 8 is rotated. Also prevent the vibration of.
次いで、モータ６ａを起動し、駆動減速装置６および伝
動チェーン７を介して、回転軸８を回転させる。回転軸
８が回転するにしたがって、粉体ホッパ１６内の粉体樹
脂１８は鋼管１，１′内で高速空気流に混入されて均等
に散布され、粉体樹脂１８の融点以上に加熱されている
鋼管１，１′およびライニング層２，２′のうち、Ｃ〜
Ｃ′範囲においてライニング防食層１９を直ちに形成さ
せる。すなわち、１発でライニング防食層１９が形成で
きる。かかる場合、粉体樹脂１８の融着速度よりもスリ
ット２０からの粉体散布量が多いため、余剰粉体が管底
に集中して堆積しようとするので、十分な周速度を有す
る攪拌羽根根１５，１５′…で、この堆積しようとする
粉体樹脂１８を管内面上方向に巻きあげ拡散させ、均等
なライニング層１９を形成する。ここで、回転軸８の回
転数は、粉体樹脂１８を均一に流動させて巻あげるため
に一定以上の速度を要するが、一方、回転数を過大にす
ると風速により粉体流が乱され、ライニング防食層１９
表面に凹凸が増加することや、鋼管１，１′の冷却が早
すぎることなどの悪影響が出てくる。つまり、乱れのな
い高速空気流に散布された粉体樹脂を混入することによ
り、均一なライニング層が形成できる。実験によれば、
７００Ａの場合、２５０rpm（羽根先端の副速度５１８
ｍｍ／分）以上で４００rpm（羽根先端の周速度８２９
ｍ／分）以下が適当であった。Next, the motor 6a is activated to rotate the rotary shaft 8 via the drive reduction gear 6 and the transmission chain 7. As the rotating shaft 8 rotates, the powder resin 18 in the powder hopper 16 is mixed with the high-speed air flow in the steel pipes 1, 1 ′ and evenly dispersed, and heated to a temperature higher than the melting point of the powder resin 18. Of steel pipes 1, 1'and lining layers 2, 2 '
The lining anticorrosive layer 19 is immediately formed in the C'range. That is, the lining anticorrosion layer 19 can be formed by one shot. In this case, since the amount of powder sprayed from the slit 20 is larger than the fusing speed of the powder resin 18, the surplus powder tends to concentrate and accumulate on the tube bottom, and thus the stirring blade root having a sufficient peripheral speed. 15, 15 ', the powder resin 18 to be deposited is rolled up toward the inner surface of the pipe and diffused to form a uniform lining layer 19. Here, the rotation speed of the rotary shaft 8 requires a certain speed or more in order to uniformly flow and wind the powder resin 18, but if the rotation speed is too high, the powder flow is disturbed by the wind speed, Lining anticorrosion layer 19
There are adverse effects such as an increase in irregularities on the surface and an excessive cooling of the steel pipes 1, 1 '. That is, a uniform lining layer can be formed by mixing the dispersed powder resin into the high-speed air stream without turbulence. According to the experiment
In the case of 700 A, 250 rpm (secondary speed of blade tip 518
400 rpm at MM / min or higher (peripheral speed of blade tip 829
m / min) or less was suitable.
一方、攪拌羽根１５，１５′…により閉塞空室１３〜１
３′に均等に拡散された粉体樹脂１８は、樹脂の融点以
上の温度を保持する１対の冷却用チューブ２４，２４′
のＣ〜Ｃ′範囲では、漸次融着していくが、その両端の
樹脂融点以下の温度部分では、依然として粉体樹脂１８
が残ることになる。この不都合を解消するため、補助攪
拌羽根２１，２１′…を設け、これでもって、粉体樹脂
１８を冷却用チューブ２４，２４′のＣ〜Ｃ′範囲の中
央部に集中させるので、粉体樹脂１８がＣ〜Ｃ範囲外の
両端に残ることがない。On the other hand, by the stirring blades 15, 15 '...
The powdered resin 18 evenly diffused in 3'is a pair of cooling tubes 24, 24 'for maintaining a temperature equal to or higher than the melting point of the resin.
In the C to C'range, the fusion is gradually performed, but in the temperature portion below the resin melting point on both ends thereof, the powder resin 18 still remains.
Will remain. In order to eliminate this inconvenience, the auxiliary stirring blades 21, 21 '... Are provided, whereby the powder resin 18 is concentrated in the central portion of the C-C' range of the cooling tubes 24, 24 '. The resin 18 does not remain on both ends outside the C to C range.
さて、回転軸８の回転方向が一方向のみであると回転方
向側のライニング防食層１９とその反対側のライニング
防食層１９とが不均一になるので、本実施施装置では、
回転軸８の全回転時間の４０％を正転ｐ、６０％を逆転
ｑとしている。Now, if the rotation direction of the rotary shaft 8 is only one direction, the lining anticorrosion layer 19 on the rotational direction side and the lining anticorrosion layer 19 on the opposite side become non-uniform.
The normal rotation p is 40% and the reverse rotation q is 60% of the total rotation time of the rotating shaft 8.
次いで、粉体ホッパ１６から粉体樹脂１８が全量排出さ
れ、かつ攪拌羽根１５，１５′…、補助攪拌羽根２１，
２１′…によっても拡散される粉体樹脂１８がなくなり
全量融着すれば、回転軸８の回転を止め、シール用チュ
ーブ１２，１２′よりエアまたは水を抜き、台車５を鋼
管１，１′より退去させる。Next, the entire amount of the powder resin 18 is discharged from the powder hopper 16, and the stirring blades 15, 15 '..., the auxiliary stirring blades 21,
When the powder resin 18 diffused by 21 '... disappears and the entire amount is fused, the rotation of the rotary shaft 8 is stopped, air or water is drained from the sealing tubes 12, 12', and the carriage 5 is attached to the steel pipes 1, 1 '. Move out more.
以上述べたライニング工程を要約すれば、第６図のよう
になる。The lining process described above can be summarized as shown in FIG.
また、本実施例装置による試験例は次のとおりである。A test example using the apparatus of this embodiment is as follows.
(1)金属鋼管 700A外形φ711.2mm 板厚ｔ 12.7m ライニング範囲 300mm 金属鋼管の加熱温度 240℃ 粉体樹脂 ポリエチレン メルトフローレイト 3.0〜5.0 粒度 50メッシュパス 回転軸 回転数 約350rpm （羽根先端の風速度726m／分） ライニング時間約３分 正転40％逆転60％ ライニング厚さ 1.5mm (2)金属鋼管 200A外径φ 216.3mm 板厚ｔ 8.2mm ライニング範囲 300mm 金属鋼管の加熱温度 230℃ 粉体樹脂 実施例(1)と同じ 回転軸 回転数 約1000rpm （羽根先端の周速度 580m／分） ライニング時間約５分 正転のみ ライニング厚さ 1.0mm （注）台車は自走式ではなく手動にて挿入、退去させ
た。(1) Metal steel pipe 700A Outer diameter φ711.2mm Plate thickness t 12.7m Lining range 300mm Metal steel pipe heating temperature 240 ℃ Powder resin Polyethylene Melt flow rate 3.0 to 5.0 Grain size 50 mesh path Rotation axis Rotation speed Approx. 350rpm (Blade tip wind Speed 726 m / min) Lining time approx. 3 minutes Normal rotation 40% Reverse rotation 60% Lining thickness 1.5mm (2) Metal steel pipe 200A outer diameter φ 216.3mm Plate thickness t 8.2mm Lining range 300mm Metal steel pipe heating temperature 230 ℃ Powder Body resin Same as Example (1) Rotation axis Rotational speed Approx. 1000 rpm (Vane tip speed 580 m / min) Lining time approx. 5 minutes Forward rotation only Lining thickness 1.0 mm (Note) Bogie is not self-propelled Was inserted and removed.
次に、第１および第２の発明の他の実施例装置について
述べれば、第５図において、回転軸８を２重管とし、内
側にエアまたは水を供給して粉体樹脂１８を冷却し、外
側には粉体樹脂１８を、エアまたはスクリュー等で定量
供給する。この供給量は、前述の粉体ホッパ１６に収納
される量と等しく所定量のみとする。かかる装置によれ
ば、同一鋼管１，１′内に何箇所にも分散してライニン
グ防食層を形成すべき部位がある合に、ライニング装置
を度々鋼管外へ鋼管外へ退去して粉体樹脂１８をつめ直
す必要がない。Next, the apparatus of another embodiment of the first and second inventions will be described. In FIG. 5, the rotating shaft 8 is a double tube, and air or water is supplied to cool the powder resin 18 inside. The powder resin 18 is quantitatively supplied to the outside by air or a screw. This supply amount is equal to the amount stored in the powder hopper 16 described above, and is only a predetermined amount. According to such a device, when there are parts where the lining anticorrosive layer should be formed by dispersing in many places in the same steel pipe 1, 1 ', the lining device is often retreated to the outside of the steel pipe to remove the powder resin. No need to repack 18.
また、本第１の実施例のように、粉体ホッパ１６から粉
体樹脂１８を遠心力のみの力で鋼管１，１′内面に散布
し、しかも攪拌羽根１５を備えている場合は、１〜1.5m
mのライニング防食層１９の厚さに対する粉体溶融時間
は約２分という制約があることから、粉体ホッパ１６か
らの粉体排出時間は約３０秒前後が適当で、それ以上長
く排出時間を確保しようとすれば、特別な機構を必要と
し、それ以下では粉体堆積量が多く攪拌羽根１５では補
助しきれない、ということが判明した。When the powder resin 18 is sprayed from the powder hopper 16 to the inner surfaces of the steel pipes 1, 1 ′ only by the centrifugal force as in the first embodiment, and the stirring blade 15 is provided, ~ 1.5m
Since the powder melting time with respect to the thickness of the m lining anticorrosion layer 19 is limited to about 2 minutes, it is appropriate that the powder discharging time from the powder hopper 16 is about 30 seconds, and the discharging time is longer than that. It was found that a special mechanism was required to secure the amount, and below that, the powder accumulation amount was too large to be supported by the stirring blade 15.
第１発明によれば、被処理部位の管内周面を囲んだ閉塞
室内に、一定量粉体容器を予め格納しておき、この一定
量粉体容器中の粉体樹脂のみを、管内周面に向け散布し
ながら、この閉塞室内で高速回転し、かつ、管内周面に
接近した攪拌羽根による、乱れのない高速空気流に混入
することにより、ライニング防食層を形成するので、 １）散布する粉体樹脂の供給量が正確に限られ、残余の
粉体回収手段が不要となり、かつ、粉体回収に要する時
間のためのライニング成形時間の延長もなく、２）閉塞
室の空気量に比べ若干量の粉体樹脂は、乱れのないこの
高速空気流に混入されて、管内周面全体に均一に四散さ
れ、３）管内周面の管底に、余剰の粉体樹脂が堆積して
も、接近した攪拌羽根による高速空気流で巻きあげら
れ、４）粉体樹脂は、乱れのない高速空気流の遠心力で
管内周面に吹き付けられる。According to the first aspect of the present invention, a fixed amount of powder container is stored in advance in a closed chamber surrounding the inner peripheral surface of the pipe at the site to be treated, and only the powder resin in the fixed amount of powder container is kept in the inner peripheral surface of the pipe. While rotating at high speed in this closed chamber while being sprayed to the inner surface of the tube, the lining anticorrosive layer is formed by mixing with the high-speed air flow without disturbance due to the stirring blades approaching the inner peripheral surface of the pipe. The amount of powder resin supplied is precisely limited, the residual powder recovery means is unnecessary, and there is no extension of the lining molding time for the time required for powder recovery. 2) Compared with the air volume in the closed chamber A small amount of powder resin is mixed into this high-speed air stream without turbulence, and is evenly dispersed over the entire inner peripheral surface of the pipe. 3) Even if excess powder resin is deposited on the bottom of the inner peripheral surface of the pipe. Is wound up with a high-speed air flow by the agitating blades that are close to each other, and 4) the powder resin is It is blown onto the inner surface of the pipe by the centrifugal force of high-speed air flow without turbulence.
ことから、総じて、均一なライニング防食層が短時間に
形成できる。Therefore, as a whole, a uniform lining anticorrosive layer can be formed in a short time.
ひいては、短時間のライニング防食層形成のため、ライ
ニング防食層の加熱による劣化を防ぐことができる。As a result, since the lining anticorrosion layer is formed in a short time, deterioration of the lining anticorrosion layer due to heating can be prevented.
例えば、ポリエチレンの粉体の場合、加熱（２４０℃）
時間を３分にした場合（本発明の場合）と４０分（従来
技術の場合）と比べれば、ライニング防食層の接着力
は、すなわち、引張り試験によれば、鋼管に対するライ
ニング防食層のめくれ現象は、１５kg（本発明の耐えた
引張り力）に対し１２kg（従来技術の耐えた引張り力）
であった。For example, in the case of polyethylene powder, heating (240 ° C)
Compared with the case where the time is set to 3 minutes (in the case of the present invention) and 40 minutes (in the case of the prior art), the adhesive strength of the lining anticorrosion layer is, that is, according to the tensile test, the lining anticorrosion layer of the steel pipe is turned up. Is 12 kg (withstand strength of conventional technology) against 15 kg (withstand strength of the present invention)
Met.
第２の発明よれば、第１の発明による効果を奏すること
は勿論、回収する装置を付加する必要がなく、ライニン
グ装置を簡素化し、安価なものとすることができる。According to the second invention, in addition to the effect of the first invention, it is not necessary to add a collecting device, and the lining device can be simplified and made inexpensive.
第１図は本発明の第１の実施例装置の縦断面図、第２図
は第１図のＡ〜Ａ断面図、第３図は第１図の攪拌羽根の
側面図、第４図は第１図の補助攪拌羽根の動作用断面
図、第５図は他の実施例装置の縦断面図、第６図は工程
図である。 １，１′……鋼管、８……回転軸、１５……攪拌羽根、
１６……粉体ホッパ、１３〜１３′……閉塞室。1 is a longitudinal sectional view of a first embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a side view of the stirring blade of FIG. 1, and FIG. FIG. 5 is a sectional view for the operation of the auxiliary stirring blade of FIG. 1, FIG. 5 is a longitudinal sectional view of another embodiment apparatus, and FIG. 6 is a process drawing. 1, 1 '... Steel pipe, 8 ... Rotating shaft, 15 ... Stirring blade,
16 ... Powder hopper, 13 to 13 '... Closed chamber.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｌ 58/10 (72)発明者 松本 進 兵庫県加古郡播磨町新島６ 丸誠重工業株 式会社播磨製造所内 (72)発明者 永田 武志 兵庫県加古郡播磨町新島６ 丸誠重工業株 式会社播磨製造所内 (56)参考文献 特開 昭56−115668（ＪＰ，Ａ) 特開 昭54−72246（ＪＰ，Ａ) 特開 昭61−42367（ＪＰ，Ａ) 実開 昭59−150566（ＪＰ，Ｕ) 実開 昭58−174280（ＪＰ，Ｕ) 実開 昭54−46030（ＪＰ，Ｕ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Reference number within the agency FI Technical display location F16L 58/10 (72) Inventor Susumu Matsumoto 6 Niijima, Harima-cho, Kako-gun, Hyogo Marusen Heavy Industries Co., Ltd. Harima Plant (72) Inventor Takeshi Nagata 6 Niijima, Harima-cho, Kako-gun, Hyogo Prefecture Marumai Heavy Industry Co., Ltd. Harima Plant (56) Reference JP-A-56-115668 (JP, A) JP-A-54-72246 (JP-A-54-72246) JP, A) JP 61-42367 (JP, A) Actually opened 59-150566 (JP, U) Actually opened 58-174280 (JP, U) Actually opened 54-46030 (JP, U)
Claims (3)
された金属管の一部管内周面の被処理部位を、１対の管
内閉塞治具により形成した閉塞室で囲み、この被処理部
位を管外より加熱するとともに、この閉塞室へ粉体樹脂
を散布して、当該被処理部位にライニング防食層を形成
するにあたり、予め、該被処理部位を所定温度に保持さ
せておき、次いで、前記閉塞室内で高速回転し、かつ、
管内周面に接近した撹拌羽根により形成された乱れのな
い高速空気流に、前記閉塞室内に予め格納されている一
定量粉体容器中の粉体樹脂のみを管内周面に向け散布し
ながら、混入することにより、ライニング防食層を短時
間に形成させることを特徴とする金属管の内面ライニン
グ方法。1. A part of a fixed metal pipe on which a lining anticorrosive layer is to be formed is surrounded by a closed chamber formed by a pair of pipe closing jigs, and the processed region is surrounded by a closed chamber. While heating from the outside of the tube, by spraying the powdered resin to this closed chamber to form the lining anticorrosion layer on the treated site, the treated site is held at a predetermined temperature in advance, and then, It rotates at high speed in the closed chamber, and
While spraying only a certain amount of powder resin in the powder container stored in advance in the closed chamber toward the inner peripheral surface of the tube in the undisturbed high-speed air flow formed by the stirring blades approaching the inner peripheral surface of the tube, A method for lining the inner surface of a metal tube, which comprises forming a lining anticorrosive layer in a short time by mixing.
された金属管の一部管内周面の被処理部位を、１対の管
内閉塞治具により形成した閉塞室で囲み、この被処理部
位を管外に加熱装置を設け、この閉塞室へ粉体樹脂を散
布するためのライニング装置を格納した金属管の内面ラ
イニング装置において、 該ライニング装置を管軸方向に横架した回転軸と、 該回転軸に設けられ、遠心力で若干量流出するよう形成
され、かつ粉体樹脂を一定量収容する粉体ホッパと、 該回転軸に設けた攪拌羽根と、 からなる金属管の内面ライニング装置2. A portion of a fixed metal pipe on which a lining anticorrosion layer is to be formed is surrounded by a closed chamber formed by a pair of pipe closing jigs, and the processed region is surrounded by a closed chamber. An inner surface lining device for a metal pipe, which is provided with a heating device outside the pipe and stores a lining device for spraying the powdered resin to the closed chamber, in which the lining device is placed across the rotary shaft and the rotary shaft. An inner surface lining device for a metal pipe, which comprises a powder hopper provided on a shaft and formed to flow out a small amount by centrifugal force and containing a fixed amount of powder resin; and a stirring blade provided on the rotating shaft.
一定量の粉体樹脂を若干量流出可能にした中空回転軸
と、 該回転軸に設けた攪拌羽根と、からなる請求項(2)に記
載の金属管の内面ライニング装置。3. A hollow rotary shaft having a lining device horizontally extending in the axial direction of the pipe and allowing a certain amount of powdered resin to flow out slightly, and a stirring blade provided on the rotary shaft. The inner surface lining device for the metal tube according to 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019369A JPH0653246B2 (en) | 1988-01-28 | 1988-01-28 | Method and apparatus for lining inner surface of metal tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019369A JPH0653246B2 (en) | 1988-01-28 | 1988-01-28 | Method and apparatus for lining inner surface of metal tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01194969A JPH01194969A (en) | 1989-08-04 |
| JPH0653246B2 true JPH0653246B2 (en) | 1994-07-20 |
Family
ID=11997429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63019369A Expired - Lifetime JPH0653246B2 (en) | 1988-01-28 | 1988-01-28 | Method and apparatus for lining inner surface of metal tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653246B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101495877B1 (en) * | 2013-07-26 | 2015-02-26 | 씨제이전기 주식회사 | Method for coating inner surface of metal tube |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2907876B1 (en) | 2006-10-26 | 2009-10-30 | Saint Gobain Pam Sa | PIPE, METHOD FOR MANUFACTURING SAME, AND CORRESPONDING TOOL |
| KR100780931B1 (en) * | 2007-09-07 | 2007-11-30 | 최재현 | Large pipeline lining device and large pipeline lining construction method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55711Y2 (en) * | 1977-09-07 | 1980-01-10 | ||
| JPS5472246A (en) * | 1977-11-22 | 1979-06-09 | Kubota Ltd | Device for coating uniformly body of revolution |
| JPS56115668A (en) * | 1980-02-18 | 1981-09-10 | Nippon Steel Corp | Formation of internal corrosion-preventive layer of metallic pipe or the like |
| JPS58174280U (en) * | 1982-05-18 | 1983-11-21 | 株式会社クボタ | Centrifugal projection lining device |
| JPS59150556U (en) * | 1983-03-29 | 1984-10-08 | 株式会社セキネ | Traveling spraying device for chemicals such as lime |
| JPS6142367A (en) * | 1984-08-03 | 1986-02-28 | Marusei Jukogyo Kk | Apparatus for lining inner surface of metal pipe |
-
1988
- 1988-01-28 JP JP63019369A patent/JPH0653246B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101495877B1 (en) * | 2013-07-26 | 2015-02-26 | 씨제이전기 주식회사 | Method for coating inner surface of metal tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01194969A (en) | 1989-08-04 |
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