JP4703970B2 - Curved lining pipe and manufacturing method thereof - Google Patents
Curved lining pipe and manufacturing method thereof Download PDFInfo
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- JP4703970B2 JP4703970B2 JP2004102149A JP2004102149A JP4703970B2 JP 4703970 B2 JP4703970 B2 JP 4703970B2 JP 2004102149 A JP2004102149 A JP 2004102149A JP 2004102149 A JP2004102149 A JP 2004102149A JP 4703970 B2 JP4703970 B2 JP 4703970B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 229920005989 resin Polymers 0.000 claims description 48
- 239000011347 resin Substances 0.000 claims description 48
- 239000002184 metal Substances 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 210000002310 elbow joint Anatomy 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000009499 grossing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Description
本発明は、金属製の管の内周面に樹脂チュープからなるライニングを施してなり、湾曲部が形成された湾曲ライニング管、及びその製造方法に関する。 The present invention relates to a curved lining pipe in which a curved portion is formed by applying a lining made of a resin tube on an inner peripheral surface of a metal pipe, and a method for manufacturing the same.
従来、ライニング管は、ステンレス鋼等からなる金属製の管に、ライニング用の樹脂チューブを嵌入して製造されている。また、湾曲部を有する配管の場合には、金属製の直管とエルボ継手とを、それぞれの端部に形成したフランジを介してボルト等で連結する。そのため、配管ラインの湾曲部には、必ずエルボ継手が必要で、フランジ・ボルトナット・ガスケットといった付属品が必要であり、スペースの無い複雑な配管ラインの場合は、隣り合うラインのフランジの干渉等を考慮する必要がある。 Conventionally, a lining pipe is manufactured by fitting a resin tube for lining into a metal pipe made of stainless steel or the like. In the case of a pipe having a curved portion, a straight metal pipe and an elbow joint are connected with a bolt or the like via a flange formed at each end. For this reason, elbow joints are always required at the curved part of the piping line, and accessories such as flanges, bolts, nuts, and gaskets are necessary. In the case of complicated piping lines that do not have space, interference of flanges on adjacent lines, etc. Need to be considered.
しかし、配管と継ぎ手との連結部分には少なからず段差や溝ができてしまい、そこに内部液体が入り込み、液溜りが発生する。そのため、洗浄性が求められる食品関連設備、医療関連設備の配管ラインや、清浄性が要求される半導体製造装置等の用途では特に問題となる。 However, there are not a few steps or grooves in the connecting portion between the pipe and the joint, and the internal liquid enters there and a liquid pool is generated. Therefore, it becomes a problem especially in applications such as food-related equipment and medical-related equipment piping lines that require detergency and semiconductor manufacturing apparatuses that require cleanliness.
また、上記の設備や装置では、配管に樹脂のライニングを施すことがあるが、このライニングは、配管後に樹脂チューブを一端から挿入し、他端から引っ張る引き込み作業を行う。このとき、樹脂チューブが円滑に管内を移行できるように、管の内周面を合成樹脂で平滑化することも行われている（例えば、特許文献１参照）。 Further, in the above facilities and apparatuses, a resin lining may be applied to the pipe, and this lining performs a drawing operation in which the resin tube is inserted from one end and pulled from the other end after the pipe. At this time, the inner peripheral surface of the tube is also smoothed with a synthetic resin so that the resin tube can smoothly move through the tube (for example, see Patent Document 1).
しかし、配管が複雑に湾曲していると、樹脂チューブの引き込みがうまく行かずに湾曲部で樹脂チューブが詰まったり、過度の力で引っ張ると樹脂チューブが破断するなどの不具合を起こすことがあり、合成樹脂による平滑化では対応できないことがある。また、配管後に樹脂チューブの引き込みを行うため、管の内周面から異物が排出されることがあり、半導体製造装置等の清浄性が要求される用途では特に問題となる。 However, if the piping is curved in a complicated manner, the resin tube may not be pulled in properly, and the resin tube may be clogged with the curved part, or if pulled with excessive force, the resin tube may break. Smoothing with synthetic resin may not be possible. In addition, since the resin tube is pulled in after the piping, foreign matter may be discharged from the inner peripheral surface of the tube, which is a problem particularly in applications that require cleanliness such as a semiconductor manufacturing apparatus.
また、例えばＵ字管のように曲げ角度が９０°を超えるような湾曲部があると、樹脂チューブを引き込むことができず、湾曲部の形状にも制限がある。 In addition, if there is a bending portion with a bending angle exceeding 90 °, such as a U-shaped tube, the resin tube cannot be pulled in, and the shape of the bending portion is also limited.
本発明はこのような状況に鑑みてなされたものであり、ライニング用の樹脂チューブの湾曲部への引き込み作業を不要にし、９０°を越える曲げ角度の湾曲部を有する配管や、複雑な湾曲部を有する配管においても容易にライニング可能で、樹脂チューブの破断等の不具合を生じることも無く、更には継手減少による液溜りを極小に抑え得る湾曲ライニング管を提供することを目的とする。 The present invention has been made in view of such a situation, eliminates the need to draw the resin tube for lining into the curved portion, and has a curved portion with a bending angle exceeding 90 °, or a complicated curved portion. It is an object of the present invention to provide a curved lining pipe that can be easily lined even in a pipe having a pipe, does not cause problems such as breakage of a resin tube, and can minimize a liquid pool due to a reduction in joints.
上記目的を達成するために、本発明は以下に示す湾曲ライニング管及びその製造方法を提供する。
（１）湾曲部を有する金属製の管にライニング用の樹脂チューブが内嵌され、端部にフランジが設けられた湾曲ライニング管であって、
前記金属製の管の内径の５％以上の肉厚の前記樹脂チューブが該金属製の管の全長にわたり内嵌されているとともに、直管部と湾曲部とが連続した一本の管体であり、かつ、前記金属製の管及び前記樹脂チューブの各フランジ側端部が前記フランジの外方に延出してフレアー部を形成しており、前記金属製の管のフレアー部に前記フランジが設けられていることを特徴とする湾曲ライニング管。
（２）複数の湾曲部を有することを特徴とする上記（１）記載の湾曲ライニング管。
（３）９０°を越える曲げ角度の湾曲部を有することを特徴とする上記（１）または（２）記載の湾曲ライニング管。
（４）樹脂チューブがフッ素樹脂製であることを特徴とする上記（１）〜（３）の何れか１項に記載の湾曲ライニング管。
（５）湾曲部を有する金属製の管にライニング用の樹脂チューブが内嵌され、端部にフランジが設けられた湾曲ライニング管の製造方法であって、
金属製の直管の全長にわたり、前記直管の内径の５％以上の肉厚の前記樹脂チュープを嵌入した後、前記樹脂チューブを嵌入した状態で前記直管の所定の位置にて湾曲し、フランジ側端部に前記金属製の管及び前記樹脂チューブの各フレアー部を形成した後、前記金属製の管のフレアー部に前記フランジを設けることを特徴とする湾曲ライニング管の製造方法。
（６）前記樹脂チューブがフッ素樹脂製であることを特徴とする上記（５）記載の湾曲ライニング管の製造方法。
In order to achieve the above object, the present invention provides a curved lining tube and a manufacturing method thereof as described below.
(1) A curved lining tube in which a resin tube for lining is fitted in a metal tube having a curved portion, and a flange is provided at an end portion ,
The resin tube having a wall thickness of 5% or more of the inner diameter of the metal tube is fitted over the entire length of the metal tube, and the straight tube portion and the curved portion are one continuous tube body. And each flange side end of the metal tube and the resin tube extends outward from the flange to form a flare portion, and the flange is provided in the flare portion of the metal tube Curved lining pipe characterized by being made .
(2) The curved lining pipe according to (1) above, which has a plurality of curved portions.
(3) The curved lining pipe according to (1) or (2) above, wherein the curved lining pipe has a curved portion with a bending angle exceeding 90 °.
(4) The curved lining pipe according to any one of the above (1) to (3), wherein the resin tube is made of a fluororesin.
(5) A method of manufacturing a curved lining pipe in which a resin tube for lining is fitted in a metal pipe having a curved portion, and a flange is provided at an end,
Over the entire length of the metallic straight pipe after fitting the resin Chupu of the wall thickness of more than 5% of the inner diameter of the straight pipe, bent while fitted into the resin tube at a predetermined position of said straight pipe, A method for manufacturing a curved lining pipe , comprising: forming the metal pipe and the flare portions of the resin tube at a flange side end, and then providing the flange to the flare portion of the metal pipe .
(6) The method for manufacturing a curved lining pipe according to (5), wherein the resin tube is made of a fluororesin.
本発明によれば、予めライニング用の樹脂チューブが嵌入された直管を湾曲させるため、極めて容易に湾曲部を備えるライニング管が得られる。また、複雑な湾曲部を有する配管のライニングも、この樹脂チューブが嵌入された直管を湾曲部に合わせて湾曲させればよく、従来のようなエルボ継手を用いて湾曲部を形成する場合に比べて、配管作業が格段に容易になる。更に、９０°を越えるような曲げ角度の湾曲部を有するライニング管も容易に得られる。また、樹脂チューブの湾曲部への引き込み作業も不要で、引き込みの際に樹脂チューブが破断するなどの不具合を起こすこともない。しかも、継手を少なくすることで、フランジの干渉もなく継手部分に発生する液溜りも無くすことができ、食品関連設備、医療関連設備、半導体製造装置等の清浄性が求められる用途に極めて好適となる。 According to the present invention, since a straight pipe in which a resin tube for lining is inserted in advance is bent, a lining pipe having a bending portion can be obtained very easily. In addition, the piping lining having a complicated curved portion may be curved by matching the straight pipe fitted with the resin tube with the curved portion, and when a curved portion is formed using a conventional elbow joint. Compared with this, piping work becomes much easier. Furthermore, a lining tube having a curved portion with a bending angle exceeding 90 ° can be easily obtained. Further, the pulling operation of the resin tube into the curved portion is unnecessary, and there is no problem that the resin tube is broken at the time of pulling. In addition, by reducing the number of joints, there is no interference with the flanges and there is no liquid pool generated in the joints, which is extremely suitable for applications that require cleanliness such as food-related equipment, medical-related equipment, and semiconductor manufacturing equipment. Become.
以下、本発明に関して詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の湾曲ライニング管の製造方法では、先ず、金属製の直管にライニング用の樹脂チューブを嵌入する。樹脂チューブの嵌入は、従来と同様に引き込みにより行うことができる。この引き込み作業は、直管に樹脂チューブを引き込むだけであるから、かなり長尺の直管に対しても容易に行うことができる。また、直管の内周面に合成樹脂等による平滑化処理を施す必要もなく、コスト的にも有利である。そして、引き込み後に直管を加熱して樹脂チューブと直管とを密着させる。 In the method for manufacturing a curved lining pipe according to the present invention, first, a resin tube for lining is inserted into a metal straight pipe. The insertion of the resin tube can be performed by drawing in as in the conventional case. This pull-in operation can be easily performed even on a considerably long straight pipe because the resin tube is simply drawn into the straight pipe. Further, it is not necessary to perform a smoothing process with a synthetic resin or the like on the inner peripheral surface of the straight pipe, which is advantageous in terms of cost. Then, after drawing, the straight pipe is heated to bring the resin tube and the straight pipe into close contact.
直管は従来から公知のもので構わず、直管はステンレス鋼管や炭素鋼鋼管等とすることができ、必要に応じて、直管の内周面に錆取り処理等を施してもよい。 The straight pipe may be a conventionally known pipe, and the straight pipe may be a stainless steel pipe, a carbon steel pipe, or the like, and if necessary, the inner peripheral surface of the straight pipe may be subjected to rust removal treatment or the like.
樹脂チューブも従来から公知のフッ素樹脂チューブ等とすることができるが、その肉厚は直管の内径の５％以上とすることが好ましく、より好ましくは６％以上とする。このような特定の肉厚とすることで、後述する湾曲工程における樹脂チューブの座屈や破断を防止することができる。 The resin tube can also be a conventionally known fluororesin tube or the like, but the wall thickness is preferably 5% or more, more preferably 6% or more of the inner diameter of the straight pipe. By setting it as such specific wall thickness, the buckling and the fracture | rupture of the resin tube in the bending process mentioned later can be prevented.
尚、樹脂チューブの肉厚の上限には制限がないが、過度の肉厚は配管の内径を小さくすることになり、また湾曲形状の違いにより（例えばＬ字管とＵ字管）外周部分での伸び量が異なることから、これらを考慮して適宜設定する。 The upper limit of the thickness of the resin tube is not limited, but excessive thickness will reduce the inner diameter of the pipe, and due to the difference in curved shape (for example, L-shaped tube and U-shaped tube) Since the amount of elongation differs, it is set appropriately in consideration of these.
次いで、樹脂チューブを嵌入した状態で直管を所定の形状に湾曲して本発明の湾曲ライニング管が得られる。湾曲は一般的なパイプベンダーを用いて行うことができるが、湾曲時の樹脂チューブの破断をより確実に防止するために、例えば図１に示すような、湾曲用の治具２０を備えるパイプベンダー１０を用いることが好ましい。治具２０は、図２に示すように、上面形状が略半円状の基部２１と、基部２１の全円弧に沿って管を収容するための断面略半円状の溝２２が形成されたものである。このパイプベンダー１０では、クランプ型３０に治具２０を装着し、樹脂チューブを嵌入した直管１の一端を治具の溝２２に係合させ、図中矢印Ａ方向に治具２０を押し込むことにより、端部の座屈等を起こすことなく、直管１に治具２０の円弧に沿った良好な湾曲部が形成される。このような治具２０を備えるパイプベンダーとして、太洋（株）製「ＴＢ−ＧＭ−３５」、同「ＴＢ−Ｒ１５−ＤＡ」等を用いることができる。
Next, the straight pipe is bent into a predetermined shape with the resin tube inserted, and the curved lining pipe of the present invention is obtained. The bending can be performed using a general pipe bender, but in order to more reliably prevent the resin tube from being broken during the bending, a pipe bender provided with a
尚、湾曲部の数や形状（曲げ角度）には制限がなく、平面形状Ｌ字形（湾曲部１箇所）やＳ字形（湾曲部２箇所）等とすることができ、従来は製造が困難であった例えば図３に示すような一端にＬ字状の湾曲部があるもの、図４に示すようなＬ字状の湾曲部の両端に直管が連続しているもの、図５及び図６に示すような角度が９０°を越える湾曲部を有するもの（極端にはスパイラル管）等も可能である。また、例えば、図７及び図８に示すように湾曲部を複数（ここでは２ケ所）有するもの、更には３次元的な構成にすることもできる。 In addition, there is no restriction | limiting in the number and shape (bending angle) of a curved part, Plane shape L shape (1 place of a curved part), S shape (2 places of a curved part), etc. can be made conventionally, and manufacture is difficult. For example, there is an L-shaped curved portion at one end as shown in FIG. 3, a straight pipe is continuous at both ends of the L-shaped curved portion as shown in FIG. 4, FIG. 5 and FIG. Those having a curved portion with an angle exceeding 90 ° as shown in FIG. Further, for example, as shown in FIGS. 7 and 8, a plurality of curved portions (here, two locations), or a three-dimensional configuration may be used.
また、その内部構造は、例えば図９に断面図で示すように、外管５１の両端部にはフレアー部５２を介してフランジ５３が設けられ、外管５２の内壁の全面に、湾曲部５４を含めて樹脂チューブからなるライナー５５が密着したものとなる。尚、符号５６はライナー５５のフレアー部である。
Further, as shown in a cross-sectional view in FIG. 9, for example, the inner structure is provided with
表１に示す内径のステンレス鋼（ＳＵＳ３０４）製の直管に、表１に示す肉厚のパーフルオロアルコキシ樹脂（ＰＦＡ）製チューブを引き込み、８０℃で管を加熱した。次いで、太洋（株）製「ＴＢ−ＧＭ−３５」を用いて、管の両端を９０°に湾曲して試験体とした。 A thick perfluoroalkoxy resin (PFA) tube shown in Table 1 was drawn into a straight tube made of stainless steel (SUS304) having an inner diameter shown in Table 1, and the tube was heated at 80 ° C. Next, using “TB-GM-35” manufactured by Taiyo Co., Ltd., both ends of the tube were bent at 90 ° to obtain a test specimen.
各試験体について、通常の適正試験である下記評価を実施した。結果を併記する。 Each specimen was subjected to the following evaluation, which is a normal appropriate test. The results are also shown.
表２に示すように、樹脂チューブ肉厚がステンレス鋼管の内径の５％未満の試験体Ｇを除く何れの試験体も全ての項目において、ＰＦＡ製チューブに破断や亀裂等が発生せず、良好な湾曲ライニング管が得られていることがわかる。 As shown in Table 2, all the test specimens except the specimen G whose resin tube thickness is less than 5% of the inner diameter of the stainless steel pipe are good in all items except that the PFA tube does not break or crack. It can be seen that a curved lining tube is obtained.
１ 樹脂チューブを嵌入した直管
１０ パイプベンダー
２０ 治具
２１ 基部
２２ 溝
３０ クランプ型
４０ ガイドレール
DESCRIPTION OF SYMBOLS 1 Straight pipe which inserted
Claims (6)
前記金属製の管の内径の５％以上の肉厚の前記樹脂チューブが該金属製の管の全長にわたり内嵌されているとともに、直管部と湾曲部とが連続した一本の管体であり、かつ、前記金属製の管及び前記樹脂チューブの各フランジ側端部が前記フランジの外方に延出してフレアー部を形成しており、前記金属製の管のフレアー部に前記フランジが設けられていることを特徴とする湾曲ライニング管。 A curved lining pipe in which a resin tube for lining is fitted in a metal pipe having a curved portion, and a flange is provided at an end portion ,
The resin tube having a wall thickness of 5% or more of the inner diameter of the metal tube is fitted over the entire length of the metal tube, and the straight tube portion and the curved portion are one continuous tube body. And each flange side end of the metal tube and the resin tube extends outward from the flange to form a flare portion, and the flange is provided in the flare portion of the metal tube Curved lining pipe characterized by being made .
金属製の直管の全長にわたり、前記直管の内径の５％以上の肉厚の前記樹脂チュープを嵌入した後、前記樹脂チューブを嵌入した状態で前記直管の所定の位置にて湾曲し、フランジ側端部に前記金属製の管及び前記樹脂チューブの各フレアー部を形成した後、前記金属製の管のフレアー部に前記フランジを設けることを特徴とする湾曲ライニング管の製造方法。 A method of manufacturing a curved lining pipe in which a resin tube for lining is fitted in a metal pipe having a curved portion, and a flange is provided at an end portion,
Over the entire length of the metallic straight pipe after fitting the resin Chupu of the wall thickness of more than 5% of the inner diameter of the straight pipe, bent while fitted into the resin tube at a predetermined position of said straight pipe, A method for manufacturing a curved lining pipe , comprising: forming the metal pipe and the flare portions of the resin tube at a flange side end, and then providing the flange to the flare portion of the metal pipe .
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| JP2004102149A JP4703970B2 (en) | 2004-03-31 | 2004-03-31 | Curved lining pipe and manufacturing method thereof |
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| JP2004102149A JP4703970B2 (en) | 2004-03-31 | 2004-03-31 | Curved lining pipe and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5150373A (en) * | 1974-10-28 | 1976-05-01 | Nippon Asbestos Co Ltd | FUTSUSOJUSHI RAININGUHO |
| JPS57107815A (en) * | 1980-12-13 | 1982-07-05 | Nichias Corp | Lining process of synthetic resin for elbow tube |
| JPS6287279U (en) * | 1985-11-22 | 1987-06-03 | ||
| JPH0232831A (en) * | 1988-07-22 | 1990-02-02 | Usui Internatl Ind Co Ltd | Bending treatment of resin tube with small diameter |
| JPH03133632A (en) * | 1989-10-20 | 1991-06-06 | Kobe Steel Ltd | Heat transfer pipe for u-shape type heat exchanger and manufacture therefor |
| JPH08118476A (en) * | 1994-10-24 | 1996-05-14 | Nichias Corp | Manufacture of sliding composite member |
| JPH11227046A (en) * | 1998-02-17 | 1999-08-24 | Osaka Gas Co Ltd | Method for lining in tube |
-
2004
- 2004-03-31 JP JP2004102149A patent/JP4703970B2/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5150373A (en) * | 1974-10-28 | 1976-05-01 | Nippon Asbestos Co Ltd | FUTSUSOJUSHI RAININGUHO |
| JPS57107815A (en) * | 1980-12-13 | 1982-07-05 | Nichias Corp | Lining process of synthetic resin for elbow tube |
| JPS6287279U (en) * | 1985-11-22 | 1987-06-03 | ||
| JPH0232831A (en) * | 1988-07-22 | 1990-02-02 | Usui Internatl Ind Co Ltd | Bending treatment of resin tube with small diameter |
| JPH03133632A (en) * | 1989-10-20 | 1991-06-06 | Kobe Steel Ltd | Heat transfer pipe for u-shape type heat exchanger and manufacture therefor |
| JPH08118476A (en) * | 1994-10-24 | 1996-05-14 | Nichias Corp | Manufacture of sliding composite member |
| JPH11227046A (en) * | 1998-02-17 | 1999-08-24 | Osaka Gas Co Ltd | Method for lining in tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005280300A (en) | 2005-10-13 |
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