JPH04160284A - Hard polyethylene pipe - Google Patents
Hard polyethylene pipeInfo
- Publication number
- JPH04160284A JPH04160284A JP2287672A JP28767290A JPH04160284A JP H04160284 A JPH04160284 A JP H04160284A JP 2287672 A JP2287672 A JP 2287672A JP 28767290 A JP28767290 A JP 28767290A JP H04160284 A JPH04160284 A JP H04160284A
- Authority
- JP
- Japan
- Prior art keywords
- hard
- pipe
- rib
- ribs
- tube
- 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.)
- Pending
Links
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 30
- -1 polyethylene Polymers 0.000 title claims abstract description 21
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 38
- 229920003002 synthetic resin Polymers 0.000 description 10
- 239000000057 synthetic resin Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005510 radiation hardening Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、内周面が平滑面に形成されている硬質ポリエ
チレン材製の管に関するものであって、殊に、大口径の
管に適した構造とした管に関するものである。Detailed Description of the Invention <Industrial Application Field> The present invention relates to a tube made of a hard polyethylene material having a smooth inner peripheral surface, and is particularly suitable for large diameter tubes. The invention relates to a pipe with a structure similar to the above.
〈従来の技術〉
従来、一般に内周面が平滑面に形成されている硬質の合
成樹脂管といえば、例えば、本発明者の出願にかかる実
開昭５８−４４５８２号公開公報や実開昭５８−４４５
８３号公開公報に見られるように、硬質合成樹脂材料を
用いてこれを断面下向き開放のコの字形であってその雨
下端を両性側方に向けてそれぞれ突出させた側縁を持つ
帯材を形成し、これらの側縁部同士を重合接着して一体
化し、下向き開放の開口部を、他の平帯体で閉塞した構
造としたもの（前者）か、別途形成した円筒状の内層管
で閉塞した二重管構造としたもの（後者）が、この種の
代表的な管である。<Prior Art> Conventionally, hard synthetic resin pipes whose inner circumferential surfaces are generally smooth are known, for example, as disclosed in Japanese Utility Model Application Publication No. 1982-44582 filed by the present inventor and Japanese Utility Model Application Publication No. 1983-1999. -445
As seen in Publication No. 83, a band material is made of a hard synthetic resin material and has a U-shaped cross section that is open downward, and has side edges with the lower end of the material protruding toward both sides. These side edges are polymerized and bonded together, and the downwardly open opening is closed with another flat band (former), or a separately formed cylindrical inner layer tube is used. A typical tube of this type is one with a closed double tube structure (the latter).
このような構造とした合成樹脂管は、単に提案されてい
るのみならず、既に量産され、大量に市場に出回ってい
る。Synthetic resin pipes having such a structure have not only been proposed, but have already been mass-produced and are on the market in large quantities.
〈発明が解決しようとする課題〉
しかしながら、従来のこの種の内面が平滑面とされてい
る硬質合成樹脂製の管は、耐圧性を持たせるための管壁
を形成する硬質合成樹脂帯の他に、下向き開放の開口部
を閉塞するための他の帯材や内層管を必要とするため、
製造が複雑となり、必ずしも量産に適しているとは言い
かた（、また、硬質合成樹脂帯における側縁部の重合接
着面の面積が小さいために十分な時間をかけて完全な接
着を行わなければならないという問題点を有していた。<Problems to be Solved by the Invention> However, conventional hard synthetic resin tubes of this type with smooth inner surfaces have a hard synthetic resin strip that forms the tube wall to provide pressure resistance. In addition, other strips and inner tubes are required to close the downward opening.
Manufacturing is complicated, and it is not necessarily suitable for mass production (Also, because the area of the polymerized adhesive surface at the side edge of the hard synthetic resin band is small, sufficient time must be spent for complete adhesion. The problem was that it had to be done.
他方、この種の硬質合成樹脂管の形成素材としては、硬
質ポリ塩化ビニール、硬質ナイロン、硬質ポリエチレン
その他硬質のＰＰ５ＡＢＳ。On the other hand, materials for forming this type of hard synthetic resin pipe include hard polyvinyl chloride, hard nylon, hard polyethylene, and other hard PP5ABS.
ＰＣ，ＰＢＴ等の素材が使用されている。Materials such as PC and PBT are used.
本発明は、これらの各素材のうち、特に硬質ポリエチレ
ンを選択して用いるものであって、該硬質ポリエチレン
が有する電気絶縁性・耐水性・防湿性・耐寒性・耐候性
等に優れた物性と、加工性に優れ、熔融状態で接着させ
れば接着剤を必要とすることなく直接接着させても完全
な接着が容易にでき、溶着部が容易に剥離したり分離し
たりすることがないという特性を有しており、更には、
素材の入手が容易であるという他の素材にはみられない
優れた性質を有していることに着目し、このような優れ
た性質を有する硬質ポリエチレンを素材として採用し、
前記従来の硬質合成樹脂管が有する問題点を解決するこ
とを目的とし、製造が容易で量産に適した構造とした硬
質ポリエチレン管を提供しようとするものである。The present invention specifically selects and uses hard polyethylene among these materials, and the hard polyethylene has excellent physical properties such as electrical insulation, water resistance, moisture resistance, cold resistance, and weather resistance. It has excellent processability, and if it is bonded in a molten state, it can be bonded directly without the need for an adhesive, and the welded part will not peel or separate easily. It has the characteristics, and furthermore,
Focusing on the fact that the material is easily available and has excellent properties not found in other materials, we adopted rigid polyethylene as the material, which has such excellent properties.
The purpose of this invention is to solve the problems of the conventional hard synthetic resin pipes, and to provide a hard polyethylene pipe that is easy to manufacture and has a structure suitable for mass production.
また、他の目的は、近来益々大口径化が求められている
地下埋設用の耐圧管に対応できる管を、上記のような性
質をもつ硬質ポリエチレンを用い、素材使用量の軽減化
と管の軽量化と製造コストの低減化とを図りながら、耐
圧性を十分に有する構造とした硬質ポリエチレン管を提
供することにある。Another objective is to reduce the amount of material used and to reduce the amount of material used by using hard polyethylene with the properties described above to create pipes that can be used for underground pressure-resistant pipes, which have recently been required to have larger diameters. It is an object of the present invention to provide a rigid polyethylene pipe having a structure having sufficient pressure resistance while reducing weight and manufacturing cost.
く課題を解決するための手段〉
上記の目的を達成するために講じた本発明の構成を、実
施例に対応する第１図及び第２図を参考にして説明する
と、本発明にいう硬質ポリエチレン管の構成は、少なく
とも一側面を略々平坦に形成した中間部（１）とその両
側縁部分から他側方に向かって略々直角方向に突出した
リブ部（２）、 （２）とによって断面コの字状とした
硬質ポリエチレン製の帯材（Ａ）を形成し、当該硬質帯
材（Ａ）におけるコの字状の凹部（３）を外周方向に向
けて開口する状態として螺旋状に巻回させ、当該隣接す
るリブ部（２）、 （２）同士を直接接当して融着接合
させである管の構造としたものである。Means for Solving the Problems> The structure of the present invention taken to achieve the above object will be explained with reference to FIGS. 1 and 2 corresponding to Examples. The structure of the tube includes a middle part (1) having at least one side substantially flat, and rib parts (2), (2) protruding from both side edge parts of the middle part (1) in a substantially right angle direction toward the other side. A rigid polyethylene strip (A) having a U-shaped cross section is formed, and the U-shaped recess (3) in the rigid strip (A) is spirally opened toward the outer circumference. It has a tube structure in which the ribs are wound around each other and the adjacent rib portions (2) are brought into direct contact with each other and fused and bonded.
また、特に、耐圧性を重視した管構造としては、上記の
硬質ポリエチレン管において、少なくとも中間部（１）
とリブ部（２）との接続角部に、鉄・鋼・ステンレス鋼
の何れかから選択された補強用の金属帯板（５）が、管
壁内に埋設されている構造としたものである。In particular, as a pipe structure with emphasis on pressure resistance, at least the middle part (1) of the above-mentioned hard polyethylene pipe is
A reinforcing metal strip (5) selected from iron, steel, or stainless steel is embedded in the pipe wall at the connecting corner between the pipe and the rib (2). be.
〈作用〉
本発明にいう硬質ポリエチレン管は、このような構造と
したものであるから、外周方向に向かって突出形成した
両リブ部（２）、 （２）が、管径方向の外圧に対抗す
ると同時に、外部からの衝撃に対してはこれらの互いに
融着されたリブ部（２）、 （２）が共同して対抗する
ので、硬質ポリエチレンの中間部（１）と両リブ部（２
）、 （２）との全体を比較的薄肉のものとしても、耐
圧性と耐衝撃性とを有するものとすることができ、両リ
ブ部（２）、 （２）間に位置する中間部（１）の少な
くとも下面を略々平坦なものとしであるから、管の内面
は従来の硬質合成樹脂管の場合と同様に直ちに平滑面と
することができるので、その他の加工工程や他の加工部
材を必要とせず、流体の輸送に適した管として用いるこ
とができる。<Function> Since the rigid polyethylene pipe referred to in the present invention has such a structure, both rib portions (2), (2) formed protruding toward the outer circumferential direction resist external pressure in the pipe radial direction. At the same time, these mutually fused rib parts (2), (2) jointly resist external impact, so that the middle part (1) of the hard polyethylene and both rib parts (2)
), (2) can be made relatively thin as a whole to have pressure resistance and impact resistance. 1) Since at least the lower surface of the tube is approximately flat, the inner surface of the tube can be immediately made smooth as in the case of conventional hard synthetic resin tubes, so it is easy to use in other processing steps and other processed parts. It can be used as a pipe suitable for transporting fluids.
〈実施例〉 以下本発明の実施例について図面に基づいて説明する。<Example> Embodiments of the present invention will be described below based on the drawings.
図中第１図及び第２図は、本発明の第１実施例を示した
図で、図中（Ａ）は、硬質ポリエチレン（以下硬質ＰＥ
という）製の長尺の帯材で、平坦な帯状に形成された中
間部（１）と、その両側縁部分から一側方（第２図にお
いて上方）に向かって直角方向に突出したリブ部（２）
、 （２）とからなり、断面形状を略々コの字状に形成
した帯材である。これらのリブ部（２）、 （２）は、
それぞれの横外側面を中間部（１）と直角とし内側面を
立ち上がり基部が広幅で先端側程細幅となるように僅か
な傾斜面に形成しである。1 and 2 are diagrams showing the first embodiment of the present invention, and (A) in the figure shows hard polyethylene (hereinafter referred to as hard PE).
) is a long strip made of a flat strip-shaped middle part (1), and rib parts projecting from both side edges of the middle part (1) in a right angle direction toward one side (upward in Fig. 2). (2)
, (2), and is a strip material having a substantially U-shaped cross section. These rib parts (2), (2) are
Each lateral outer surface is made perpendicular to the middle part (1), and the inner surface is formed into a slightly inclined surface with a rising width at the base and narrowing toward the tip.
而して、このように両端にリブ部（２）、 （２）を突
出している状態として、合成樹脂押出機の押し出し口か
ら順次帯材（Ａ）を押し出し、前記硬質帯材（Ａ）にお
けるコの字状の凹部（３）を外周方向に向かって開口す
るように位置させて管底型機におけるマンドレル上にお
いて順次螺旋状に巻回し、互いに隣接するリブ部（２）
、 （２）の面同士を接当させて融着接合させて管Ｐを
形成したものである、。With the rib portions (2), (2) protruding from both ends in this manner, the strip material (A) is sequentially extruded from the extrusion port of the synthetic resin extruder, and the hard strip material (A) is The U-shaped recesses (3) are positioned so as to open toward the outer circumference, and the ribs (2) are successively wound spirally on a mandrel in a tube bottom type machine.
, The pipe P is formed by bringing the surfaces of (2) into contact with each other and fusion-bonding them.
次に、該実施例に基いて形成した管Ｐとこの管Ｐの管壁
を構成する帯材（Ａ）との各部の具体的な実測寸法につ
いて説明する。第２図に示したように、硬質帯材（Ａ）
における中間部（１）を横幅ｂ＝２９．５諺諺、同肉厚
ｔ＝３．８露翼、リブ部（２）の高さｈ＝１８，５ｍｍ
、リブ部分の厚さ幅（Ｗ）＝３．６ａｌｌとし、第１図
に示したように、管Ｐの内径ｄが約３００ｍｍの管を製
造した。この管の実測寸法は、内径ｄ”３００．６露ｍ
、リブ先端間の外径Ｄ＝３３７．６ｍｓ＋であった。Next, specific measured dimensions of each part of the pipe P formed based on this example and the band material (A) constituting the wall of this pipe P will be explained. As shown in Fig. 2, hard strip material (A)
The middle part (1) of the width b = 29.5mm, the thickness t = 3.8mm, and the height of the rib part (2) h = 18.5mm.
The thickness and width (W) of the rib portion were set to 3.6all, and a tube P having an inner diameter d of about 300 mm was manufactured as shown in FIG. The actual dimensions of this tube are the inner diameter d”300.6 m
, the outer diameter D between the rib tips was 337.6 ms+.
このような構造とした管（Ｐ）の耐圧性能について試験
した結果は、次表のとおりである。The results of testing the pressure resistance of the pipe (P) having such a structure are shown in the following table.
（試料の長さ５００ｍｍ）
この試験結果を見ると、本発明の管は、２．５％偏平荷
重でにおいても、５％偏平荷重においても、耐圧性能を
必要とする一般の工業用管として十分に使用できる管で
あることが実証されるに至った。(Sample length: 500 mm) Looking at the test results, the pipe of the present invention is sufficient as a general industrial pipe that requires pressure resistance under both 2.5% flat load and 5% flat load. It has now been demonstrated that the tube can be used for
第３図に示した実施例は、耐圧性を有する管に関する実
施例を示したもので、帯材（Ａ）の中間部（１）と左右
のリブ部（２）、 （２）との硬質ＰＥの内部に、一連
に続（−枚の、補強部材としての金属帯板（鉄・鋼・ス
テンレス鋼等からなる帯板）（５）を、素材の硬質ＰＥ
と融着させた状態として埋設させた管の実施例を示した
ものである。 該実施例における帯材（Ａ）は、金属帯
板（５）として厚さ０．８ｍ＋Ｌ板幅７０．５ｍｍの特
殊鋼板の表面に０．２〜０．３■ｍ厚のＰＥを被覆した
被覆銅板を用い、この被覆鋼板の両表面をそれぞれ１．
７〜１．８ｍｍ厚に硬質ＰＥでモールドしである構造（
図面では内外面のモールド肉厚を変えたものとして示し
である）とし、中間部（１）及び両リブ部（２）、 （
２）の全体肉厚ｔ＝４．８ｍｍの均等肉厚のものとし、
該硬質帯材（＾）における中間部（１）を横幅ｂ＝５５
．０諺冨、リブ部（２）の高さｈ＝１５．５諺諺とし、
中間部の幅すとリブ部（２）の高さｈとの関係をｂ−＝
３．５ｈとしたものである。該実施例に基いて、管Ｐの
内径ｄが約３００ｍ＋ａの管を製造した。この管の実測
寸法は、内径ｄ＝３００．５ｍｍ、リブ先端間の外径Ｄ
＝３３１．５１１璽であった。The embodiment shown in Fig. 3 is an embodiment related to a pressure-resistant pipe, in which the middle part (1) of the band material (A) and the left and right rib parts (2), (2) are made of a hard material. A series of (-) metal strips (strips made of iron, steel, stainless steel, etc.) (5) as reinforcing members are placed inside the PE.
This figure shows an example of a pipe buried in a fused state. The band material (A) in this example is a metal band plate (5) made of a special steel plate with a thickness of 0.8 m + L plate width of 70.5 mm, and a PE coated with a thickness of 0.2 to 0.3 μm. Using a copper plate, both surfaces of this coated steel plate were coated with 1.
Molded with hard PE to a thickness of 7 to 1.8 mm (
In the drawing, the inner and outer mold wall thicknesses are shown as having been changed), and the middle part (1) and both rib parts (2), (
2) The overall wall thickness t = 4.8 mm and a uniform wall thickness,
The middle part (1) of the hard strip material (^) has a width b=55
．． 0, the height of the rib portion (2) h = 15.5,
The relationship between the width of the middle part and the height h of the rib part (2) is b-=
The duration is 3.5 hours. Based on this example, a tube P having an inner diameter d of approximately 300 m+a was manufactured. The actual dimensions of this tube are: inner diameter d = 300.5 mm, outer diameter D between the rib tips.
= 331.511 seals.
このような構造とした管（Ｐ）の耐圧性能について試験
した結果は、次表のとおりである。The results of testing the pressure resistance of the pipe (P) having such a structure are shown in the following table.
（試料の長さ５００窮冨）
この試験結果を見ると、該実施例の管は、２゜５％偏平
荷重においても、５％偏平荷重においても、ＦＲＰ管と
同等以上の大きな耐圧性を有しており、大きな土圧がか
かり、耐圧性能が特に要求される地中埋設用の管として
十分に耐え得る耐圧性能を有する優れた管であることが
実証されるに至った。(Sample length: 500 mm) Looking at the test results, the pipe of this example has a pressure resistance equal to or higher than that of the FRP pipe, both under a 2.5% flat load and a 5% flat load. It has been demonstrated that this pipe has an excellent pressure resistance that can withstand large earth pressures and is suitable for use as a pipe buried underground, where pressure resistance is particularly required.
第４図に示した実施例は、中間部（１）の中央部分に突
条部（６）を形成したものとし、補強部材としての金属
帯板（５）、 （５）の断面形状をＬ字形のものとして
、両リブ部（２）、 （２）とこれに連なる中間部（１
）の一部との角部に埋設した構造としたものである。ま
た、該実施例における帯材（Ａ）は、中間部（１）の幅
（ｂ）とリブ部（２）の高さ（ｈ）との関係をｂ＃３ｈ
とし、帯材（Ａ）の構造を、中間部（１）の背面側（管
の内面側）に耐摩耗性ゴム層（８）を一体内に融着形成
した構造として、管の内面側にゴム層（８）が形成され
ている管構造としたものである。In the embodiment shown in FIG. 4, a protrusion (6) is formed in the center of the intermediate part (1), and the cross-sectional shape of the metal strips (5), (5) as reinforcing members is L. As for the rib part (2), (2) and the intermediate part (1
) is buried in the corner of a part of the In addition, the strip material (A) in this example has a relationship between the width (b) of the intermediate portion (1) and the height (h) of the rib portion (2).
The structure of the band material (A) is such that the wear-resistant rubber layer (8) is integrally fused to the back side (inner surface side of the tube) of the intermediate portion (1), and It has a tubular structure on which a rubber layer (8) is formed.
このように、管の内面側に耐摩耗性のゴム層（８）が形
成されている管は、スラリーや粉粒体によって管内面の
摩耗の激しい浚渫用や穀物輸送用の管として適している
。In this way, a tube with a wear-resistant rubber layer (8) formed on the inner surface of the tube is suitable for dredging or grain transportation, where the inner surface of the tube is subject to severe abrasion due to slurry or powder particles. .
第５図に示した実施例は、地中に埋設して用いる暗渠管
についての実施例を示したものであって、地中の水を管
内に集水するための集水口（７）・・・を、帯材（＾）
における中間部（１）の中央部分に貫通形成しであるも
のとし、補強部材としての金属帯板（５）、 （５）の
断面形状を縦方向に長いＬ字形のものとし、両リブ部（
２）、 （２）とこれ部の幅（ｂ）とリブ部（２）の高
さｈとの関係をｂ＃１．４ｈとしたものである。The embodiment shown in Fig. 5 is an embodiment of an underdrain pipe that is buried underground and used, and includes a water collection port (7) for collecting underground water into the pipe.・The band material (^)
The metal strips (5), (5) serving as reinforcing members have a longitudinally long L-shaped cross section, and both rib portions (
2), The relationship between (2) and the width (b) of this part and the height h of the rib part (2) is set to b#1.4h.
第６図に示した実施例は、中間部（１）の両端部分に形
成しであるリブ部（２）、 （２）とは別に、中間部（
１）の中央部分にも突出リブ部（２ａ）を形成しである
ものとし、補強部材としての金属帯板（５）の断面形状
を前記第３図に示したもののように、断面コの字形のも
のとし、両リブ部（２）、（２）と中間部（１）の全長
とに亙って一連のものとして埋設しである構造としたも
のである。また、帯材（Ａ）における端部リブ部（２）
、 （２）と中間リブ部（２ａ）との間の中間部の幅（
ｂ）とリブ部（２）の高さｈとの関係をｂ＃１．２ｈと
したものである。In the embodiment shown in FIG.
A protruding rib part (2a) is also formed in the central part of 1), and the cross-sectional shape of the metal strip plate (5) as a reinforcing member is U-shaped as shown in FIG. 3 above. The structure is such that both rib portions (2), (2) and the entire length of the intermediate portion (1) are buried as a series. In addition, the end rib portion (2) in the band material (A)
, (2) and the width of the intermediate part between the intermediate rib part (2a) (
The relationship between b) and the height h of the rib portion (2) is b#1.2h.
本発明にいう硬質ＰＥ材とは、一般に硬質ＰＥと呼ばれ
ている硬度のものであれば、どのような硬度のものであ
っても、管の使用目的に応じて任意に選択して使用すれ
ばよいものであるが、地中に埋設して用いる管の場合に
は、特に耐圧偏平強度が要求されるので、このような耐
圧管を製造するに当たっては、硬度Ｄ６６〜Ｄ７３度の
範囲のものが、素材の使用量を軽減化する上で適してい
る。The hard PE material referred to in the present invention refers to any hardness material that is generally referred to as hard PE, and may be arbitrarily selected and used depending on the intended use of the pipe. However, in the case of pipes that are buried underground, pressure-resistant flattening strength is particularly required, so when manufacturing such pressure-resistant pipes, it is recommended to use pipes with a hardness in the range of D66 to D73 degrees. However, it is suitable for reducing the amount of material used.
また、管の偏平強度を増加させるために、硬質ＰＥの帯
材（＾）の内部に埋設する金属帯板としては、鉄・鋼・
ステンレス鋼等の硬度のあるものがよい。In addition, in order to increase the flat strength of the pipe, metal strips embedded inside the hard PE strip (^) are made of iron, steel,
A hard material such as stainless steel is best.
また、硬質ＰＥの帯材（Ａ）における中間部（１）の幅
（ｂ）とリブ部（２）の高さ（ｈ）との関係比は、前記
第３図に示したｂ＃３．５ｈ程度のものか、ｂ＝４ｈ程
度のものから、前記第６図に示したｂ＝１．２ｈ程度の
範囲内のものとするのがよい。リブ部（２）の高さｈを
ｂζ５ｈ以下の低いものとすると耐圧偏平強度が低下し
、帯材（Ａ）を厚肉のものとしなければならず、また、
同比率を例えばｂ＃ｈ以上にリブ部（２）を高いものと
すると、管形成後の放熱硬化時に生じる熱収縮によって
リブ部（２）が傾斜姿勢になり昌く、直角方向に整然と
直立した姿勢に形成し難いという問題を生ずる。Further, the relationship ratio between the width (b) of the intermediate portion (1) and the height (h) of the rib portion (2) in the hard PE strip (A) is as shown in FIG. 3 above. It is preferable to use a value in the range of about 5h or b=4h to b=1.2h as shown in FIG. If the height h of the rib portion (2) is set to be as low as bζ5h or less, the pressure-resistant flat strength will decrease, and the strip material (A) must be made thick.
If the same ratio is set higher than b#h, for example, the rib part (2) will take an inclined position due to the heat contraction that occurs during heat radiation hardening after forming the tube, and will stand neatly in the right angle direction. This creates a problem in that it is difficult to adjust the posture.
以上本発明の代表的な実施例について説明したが、本発
明は、これらの実施例のみに限られるものではなく、本
発明の構成要件を備え、上記の目的を達成し、以下にい
う効果を有する範囲内において適宜変更を加えて実施す
ることが出来るものである。Although typical embodiments of the present invention have been described above, the present invention is not limited to these embodiments, but has the constituent elements of the present invention, achieves the above object, and has the following effects. It can be implemented with appropriate modifications within the scope of the present invention.
〈発明の効果〉
以上の説明から既に明らかなように、本発明は、硬質Ｐ
Ｅ材を素材として用いるものであって、これを中間部の
両側から一側方向に向かって略々直角方向に向かって突
出するリブ部を有する断面コの字状の帯材として、これ
を螺旋状に巻回し、隣接するリブ部同士を直接接当させ
て、リブ部の外側面全面で融着した構造としであるので
、融着面積を太き（とることができ、帯材同士の融着接
合を確実なものとすることができる利点を有しており、
しかも、管の形成に当たっては、内管を形成する必要が
ないので、製造が容易であるという利点がある。<Effects of the Invention> As is already clear from the above description, the present invention provides hard P
E material is used as a material, and this is made into a strip material having a U-shaped cross section and having rib portions protruding from both sides of the intermediate portion toward one side in a substantially perpendicular direction. The structure is such that the adjacent rib parts are directly abutted to each other and fused on the entire outer surface of the rib part, so the fused area can be thickened and the fusion of the strips to each other can be improved. It has the advantage of ensuring reliable bonding.
Moreover, since there is no need to form an inner tube when forming the tube, there is an advantage that manufacturing is easy.
また、本発明は、このような利点を有しているものであ
りながら、本発明の管自体は、融着一体止された相隣接
するリブ部の存在によって、耐圧性に優れ、内管形成用
の素材を必要とせず、内面の平滑な管を得ることができ
、殊に、耐圧性能が要求される地中埋設用の大口径の耐
圧管を容易に得ることができ、しかも、このような耐圧
性に優れた大口径管を、素材である硬質ポリエチレンの
使用量を軽減化しながら、運搬や移動が容易な比較的軽
量な管を得ることができるという顕著な効果を有するも
のである。Although the present invention has such advantages, the tube itself has excellent pressure resistance due to the presence of adjacent rib portions that are fused and fixed together, and the inner tube is formed easily. It is possible to obtain a pipe with a smooth inner surface without the need for special materials, and in particular, it is possible to easily obtain a large-diameter pressure-resistant pipe for underground burial, which requires pressure-resistant performance. This method has the remarkable effect of making it possible to obtain a relatively lightweight pipe that is easy to transport and move, while reducing the amount of hard polyethylene used as a material.
図中第１図及び第２図は本発明の第１実施例を示した図
で、第１図は一部切欠正面図、第２図は管壁部と帯材と
の縦断面図、第３図は別実施例を示す管壁部と帯材との
縦断面図、第４図及び第５図はそれぞれ他の実施例を示
す管壁部の縦断面図、第６図は更に他の実施例を示す帯
材の縦断面図である。
図中（Ａ）は硬質ポリエチレン製帯材、（１）は中間部
、（２）はリブ部、（３）は凹部、を示す。
第１図
第３図
第４図1 and 2 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is a partially cutaway front view, FIG. FIG. 3 is a longitudinal sectional view of a tube wall and a band material showing another embodiment, FIGS. 4 and 5 are longitudinal sectional views of a tube wall showing other embodiments, and FIG. 6 is a longitudinal sectional view of a tube wall showing another embodiment. It is a longitudinal cross-sectional view of a strip material showing an example. In the figure, (A) shows the rigid polyethylene band material, (1) shows the middle part, (2) shows the rib part, and (3) shows the recessed part. Figure 1 Figure 3 Figure 4
Claims (1)
間部（１）とその両側縁部分から他側方に向かって略々
直角方向に突出したリブ部（２）、（２）とからなる断
面コの字状の硬質ポリエチレン製の帯材（Ａ）が、当該
硬質帯材（Ａ）におけるコの字状の凹部（３）が外周方
向に向かって開口する状態で螺旋状に巻回され、当該隣
接するリブ部（２）、（２）同士が直接接当して融着接
合されている硬質ポリエチレン管。 ［２］中間部（１）とリブ部（２）との接続角部に、鉄
・鋼・ステンレス鋼の何れかから選択された補強用の金
属帯板（５）が埋設されている特許請求の範囲第［１］
項に記載の硬質ポリエチレン管。[Scope of Claims] [1] An intermediate portion (1) having at least one side substantially flat, and rib portions (2) protruding from both side edge portions toward the other side in a substantially perpendicular direction. , (2), a rigid polyethylene strip (A) having a U-shaped cross section is in a state in which the U-shaped recess (3) in the rigid strip (A) opens toward the outer circumference. A hard polyethylene pipe that is spirally wound with the adjacent rib portions (2), (2) directly abutting each other and fusion-bonded. [2] A patent claim in which a reinforcing metal strip (5) selected from iron, steel, or stainless steel is embedded in the connecting corner between the intermediate portion (1) and the rib portion (2). Range No. 1
Rigid polyethylene pipes as described in Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2287672A JPH04160284A (en) | 1990-10-24 | 1990-10-24 | Hard polyethylene pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2287672A JPH04160284A (en) | 1990-10-24 | 1990-10-24 | Hard polyethylene pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04160284A true JPH04160284A (en) | 1992-06-03 |
Family
ID=17720226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2287672A Pending JPH04160284A (en) | 1990-10-24 | 1990-10-24 | Hard polyethylene pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04160284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000022334A1 (en) * | 1998-10-09 | 2000-04-20 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| JP2011231786A (en) * | 2010-04-23 | 2011-11-17 | Sekisui Chem Co Ltd | Strip member with reinforcing material for regeneration pipe made pipe, and method of manufacturing the same |
-
1990
- 1990-10-24 JP JP2287672A patent/JPH04160284A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000022334A1 (en) * | 1998-10-09 | 2000-04-20 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| US6629547B1 (en) * | 1998-10-09 | 2003-10-07 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| US7094310B2 (en) | 1998-10-09 | 2006-08-22 | Sekisui Chemical Co., Ltd. | Method for joining high-pressure composite pipes |
| JP2011231786A (en) * | 2010-04-23 | 2011-11-17 | Sekisui Chem Co Ltd | Strip member with reinforcing material for regeneration pipe made pipe, and method of manufacturing the same |
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