JPH03187724A - Coating of inner face of pipe and cylindrical body for coating of inner face of pipe - Google Patents
Coating of inner face of pipe and cylindrical body for coating of inner face of pipeInfo
- Publication number
- JPH03187724A JPH03187724A JP32863789A JP32863789A JPH03187724A JP H03187724 A JPH03187724 A JP H03187724A JP 32863789 A JP32863789 A JP 32863789A JP 32863789 A JP32863789 A JP 32863789A JP H03187724 A JPH03187724 A JP H03187724A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- sponge
- coating
- lining material
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000000565 sealant Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000004698 Polyethylene Substances 0.000 abstract description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 229920003002 synthetic resin Polymers 0.000 abstract description 4
- 239000000057 synthetic resin Substances 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 abstract description 3
- 229920000728 polyester Polymers 0.000 abstract description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract description 2
- 238000009958 sewing Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、管内に導入した筒状ライニング材を、それに
付設した多孔状体に含浸させたシール剤により管内面に
接着させる管内面被覆方法、並びに、それに使用する管
内面被覆用筒体に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for coating the inner surface of a pipe, in which a cylindrical lining material introduced into the pipe is adhered to the inner surface of the pipe using a sealing agent impregnated into a porous body attached to the cylindrical lining material. , and a cylindrical body for coating the inner surface of a tube used therein.
従来、上記多孔状体として織布を使用していた。 Conventionally, woven fabric has been used as the porous body.
しかし、織布は薄くて弾性が乏しくかっ含浸容量が小さ
く、そのために下記（イ）ないしく二）項の問題を生じ
る危険性があり、−層の改良の余地があった。However, the woven fabric is thin, has poor elasticity, and has a small impregnating capacity, so there is a risk that the following problems (a) or 2) may occur, and there is room for improvement in the layer.
（イ） シールの信頼性を高めるために、多量のシー
ル剤を筒状ライニング材と管の間に入れようとすると、
シール剤の流下によって筒状ライニング材の上部に空洞
が発生すると共に、筒状ライニング材の下部が押上げら
れ、空洞への浸水で筒状ライニング材が剥離したり、筒
状ライニング材押上げて管内有効径が減少する。(b) If you try to put a large amount of sealant between the cylindrical lining material and the pipe to increase the reliability of the seal,
As the sealant flows down, a cavity is created in the upper part of the cylindrical lining material, and the lower part of the cylindrical lining material is pushed up, causing the cylindrical lining material to peel off or be pushed up by water entering the cavity. The effective pipe diameter decreases.
（ロ）管内面の凹凸や錆によって筒状ライニング材の内
面が凹凸の激しいものになる。(b) The inner surface of the cylindrical lining material becomes extremely uneven due to the unevenness and rust on the inner surface of the tube.
（ハ）管内面の突起により筒状ライニング材が破損する
。(c) The cylindrical lining material is damaged by the protrusions on the inner surface of the tube.
（ニ）埋設管の場合には、土圧や地震による管の変形に
伴って筒状ライニング材が引張りで破損する。(iv) In the case of buried pipes, the cylindrical lining material is damaged by tension as the pipe deforms due to earth pressure or earthquakes.
本発明の目的は、上記各種問題を解消できる優れた管内
面被覆を確実に実現できるようにする点にある。An object of the present invention is to reliably realize an excellent tube inner surface coating that can solve the various problems mentioned above.
本発明の特徴手段は、管内に導入した筒状ライニング材
を、それに付設した多孔状体に含浸させたシール剤によ
り管内面に接着させる管内面被覆方法において、前記多
孔状体としてスポンジを用いることにあり、その作用効
果は次の通りである。A characteristic means of the present invention is a method for coating the inner surface of a pipe in which a cylindrical lining material introduced into the pipe is adhered to the inner surface of the pipe with a sealant impregnated into a porous member attached thereto, in which a sponge is used as the porous member. Its functions and effects are as follows.
スポンジ、つまり弾性の多孔質合成樹脂やスポンジゴム
などは、肉厚を大にすることが容易であり、弾性に富み
、シール剤の含浸容量が大きく、したがって、筒状ライ
ニング材をそれに付設したスポンジに含浸させたシール
剤によって管内面に接着すると、以下の優れた作用が得
られる。Sponges, such as elastic porous synthetic resins and sponge rubber, are easy to increase in wall thickness, have high elasticity, and have a large sealant impregnation capacity. By adhering to the inner surface of the tube with a sealant impregnated with , the following excellent effects can be obtained.
（イ）シールの信頼性を高めるために、多量のシール剤
をスポンジに含浸させても、スポンジの大きな含浸容量
によりシール剤の流下が生じに（く、シール剤流下によ
る空洞発生や筒状ライニング材押上げの無い良好な管内
面被覆を確実に実現できる。(b) In order to improve the reliability of the seal, even if a sponge is impregnated with a large amount of sealant, the large impregnating capacity of the sponge will prevent the sealant from flowing down. It is possible to reliably achieve a good tube inner surface coating without material push-up.
（ロ）管内面に凹凸や錆が存在しても、筒状ライニング
材の内部を加圧してシール剤を硬化させれば、スポンジ
の弾性変形により筒状ライニング材の内面を平滑に仕上
げられる。(b) Even if there are irregularities or rust on the inner surface of the pipe, if the inside of the cylindrical lining material is pressurized to harden the sealant, the inner surface of the cylindrical lining material can be finished smooth due to the elastic deformation of the sponge.
（ハ）管内面に突起が存在しても、スポンジの大きな肉
厚で突起が筒状ライニング材に届かないようにでき、突
起による筒状ライニング材の破損を防止できる。(c) Even if there are protrusions on the inner surface of the pipe, the large thickness of the sponge prevents the protrusions from reaching the cylindrical lining material, thereby preventing damage to the cylindrical lining material due to the protrusions.
（ニ）埋設管の場合、シール剤の調合に際して主剤に対
する硬化剤の添加量調節などで硬化シール剤に弾性があ
るようにすれば、土圧や地震などで管が変形しても、ス
ポンジとシール剤の弾性変形によって筒状ライニング材
の引張り応力が余り大にならないようにでき、筒状ライ
ニング材の破損を防止できる。(d) In the case of buried pipes, if the cured sealant is made elastic by adjusting the amount of curing agent added to the main compound when mixing the sealant, even if the pipe is deformed due to earth pressure or earthquakes, it will not behave like a sponge. Due to the elastic deformation of the sealant, the tensile stress of the cylindrical lining material can be prevented from becoming too large, and damage to the cylindrical lining material can be prevented.
要するに、スポンジの特性を有効利用して、シールの信
頼性に優れた良好な管内面被覆を確実に実現できる。In short, by effectively utilizing the characteristics of the sponge, it is possible to reliably achieve a good tube inner surface coating with excellent seal reliability.
その結果、極めて簡単かつ安価な手段改良によって良好
な管内面被覆を確実に実現できる、実用価値の高い管内
面被覆方法を確立できた。As a result, we were able to establish a highly practical method for coating the inner surface of a tube, which can reliably achieve good coating of the inner surface of the tube by extremely simple and inexpensive improvements.
請求項２に示すように、筒状ライニング材の内部加圧に
よって、かつ、スポンジの弾性変形を利用して、シール
剤を隙間に押出し注入して硬化させると、−段と信頼性
の高い管内面被覆を実現できる。As shown in claim 2, when the sealant is extruded into the gap and cured by applying internal pressure to the cylindrical lining material and by utilizing the elastic deformation of the sponge, the interior of the pipe becomes much more reliable. Surface coverage can be achieved.
請求項３及び４に示すように、スポンジを付設した管内
面被覆用筒体を提供すると、本発明の優れた管内面被覆
方法を手軽に実行できる。As shown in claims 3 and 4, by providing a cylinder for coating the inner surface of a tube with a sponge attached, the excellent method for coating the inner surface of a tube according to the present invention can be carried out easily.
次に実施例を示す。 Next, examples will be shown.
使用する管内面被覆用筒体（１）は、第１図に示すよう
に、筒状ライニング材（１ａ）の内面に全体にわたって
スポンジ（１ｂ）を付設し、スポンジ（１ｂ）にシール
剤を含浸させたものである。As shown in Fig. 1, the tube (1) used for coating the inner surface of a pipe has a sponge (1b) attached to the entire inner surface of a cylindrical lining material (1a), and the sponge (1b) is impregnated with a sealant. This is what I did.
筒状ライニング材（１ａ）は、例えばポリエチレン、ポ
リ塩化ビニル、ポリプロピレン、セロノ１ン、ポリ塩化
ビニリデン、ポリビニルアルコール、ポリエチレン、ナ
イロン、ポリカーボネイト、ポリエステルなどのシート
から成るもの、及び、それらシートの複合シートやラミ
ネートシートから成る。The cylindrical lining material (1a) is made of, for example, a sheet of polyethylene, polyvinyl chloride, polypropylene, seronone, polyvinylidene chloride, polyvinyl alcohol, polyethylene, nylon, polycarbonate, polyester, etc., or a composite sheet of these sheets. and laminate sheets.
スポンジ（１ｂ）は弾性の多孔質合成樹脂やスポンジゴ
ムから成り、多孔質合成樹脂は、フェノール系、尿素系
、メラニン系、アルキド系、ポリエステルイソシアネー
ト系などの熱硬化性樹脂、ポリビニルホルマール、ポリ
塩化ビニル、ポリエチレンなどの熱可塑性樹脂、エステ
ル、エーテル、ビスコースなどのセルロース誘導体から
成る。The sponge (1b) is made of elastic porous synthetic resin or sponge rubber, and the porous synthetic resin is thermosetting resin such as phenol, urea, melanin, alkyd, polyester isocyanate, polyvinyl formal, polychloride, etc. Consists of thermoplastic resins such as vinyl and polyethylene, and cellulose derivatives such as esters, ethers, and viscose.
スポンジ（Ｉｂ）の肉厚は５ｍｍ以上が望ましく、さら
に望ましくは１０ｍｍ以上で“あり、スポンジ（１ｂ）
の見掛密度は０．２ｇ／ｃｎｒ以下が望ましい。The thickness of the sponge (Ib) is preferably 5 mm or more, more preferably 10 mm or more.
The apparent density of is preferably 0.2 g/cnr or less.
筒状ライニング材（１ａ）にスポンジ（１ｂ）を付設す
るに、接着、融着、縫合せなど適当な手段を利用できる
。To attach the sponge (1b) to the cylindrical lining material (1a), any suitable means such as adhesion, fusion, or stitching can be used.
シール剤は、例えばビスフェノールＡ型とジエチレント
リアミンから成るエポキシ樹脂、ウレタン樹脂等である
。The sealant is, for example, an epoxy resin made of bisphenol A type and diethylenetriamine, a urethane resin, or the like.
第２図に示すように、埋設導管（Ｐ）を２箇所で掘出し
て切断する。As shown in FIG. 2, the buried conduit (P) is excavated and cut at two locations.
前記管内面被覆用筒体（１）のリール（２）を内蔵する
ケース（３）を埋設導管（Ｐ）の一端側に接続すると共
に、リール（２）から引出した管内面被覆用筒体（１）
の先端を埋設導管（Ｐ）の一端側に固定する。The case (3) containing the reel (2) of the tube inner surface coating cylinder (1) is connected to one end side of the buried conduit (P), and the tube inner surface coating tube (1) pulled out from the reel (2) is connected to one end side of the buried conduit (P). 1)
Fix the tip of the pipe to one end of the buried conduit (P).
加圧流体供給装置（４）によりケース（３）内に加圧流
体を供給し、ケース（３）からの加圧流体を管内面被覆
用筒体（１）に作用させ、管内面被覆用筒体（１）を加
圧流体により反転させながら埋設導管（Ｐ、）内に送り
込み、スポンジ（１ｂ）に含浸させたシール剤により筒
状ライニング材（１ａ）を管内面に全周にわたって接着
させる。A pressurized fluid is supplied into the case (3) by the pressurized fluid supply device (4), and the pressurized fluid from the case (3) is applied to the tube inner surface coating cylinder (1). The body (1) is sent into the buried conduit (P,) while being inverted by pressurized fluid, and the cylindrical lining material (1a) is adhered to the entire circumference of the inner surface of the pipe using a sealant impregnated into the sponge (1b).
埋設導管（Ｐ）の全長にわたって管内面被覆用筒体（１
）を接着すれば、リール（２）の制動により管内面被覆
用筒体（１）の繰出しを止め、管内面被覆用筒体（１）
の剥離が生じない程度にシール剤が硬化するまで、加圧
流体供給装置（４）により管内面被覆用筒体（１）の内
部加圧を継続する。The tube inner surface coating cylinder (1
), the braking of the reel (2) will stop the feeding of the pipe inner surface coating cylinder (1), and the pipe inner surface coating cylinder (1) will be removed.
The pressurized fluid supply device (4) continues to pressurize the inside of the tube inner surface coating cylinder (1) until the sealant is hardened to such an extent that no peeling occurs.
この時、必要に応じて、加圧力を適当に高く設定し、筒
状ライニング材（１ａ）の伸びや展張による拡径に伴っ
てスポンジ（１ｂ）を圧縮変形させ、スポンジ（１ｂ）
に含浸させてシール剤を埋設導管（Ｐ）の亀裂部や漏洩
部、継手部、その他の全部又は一部における隙間に押出
し注入し、その押出し注入したシール剤の逆流を阻止す
るに必要な時間、筒状ライニング材（１ａ）の内部加圧
を継続する。At this time, if necessary, the pressure is set appropriately high to compress and deform the sponge (1b) as the cylindrical lining material (1a) expands and expands in diameter.
The time required to impregnate and extrude the sealant into cracks, leaks, joints, and other gaps in all or part of the buried conduit (P), and to prevent the extruded and injected sealant from flowing back. , the internal pressurization of the cylindrical lining material (1a) is continued.
管内面被覆や隙間へのシール剤充填が完了すれば、管内
面被覆用筒体（１）を適当な長さに切って、管内面被覆
用筒体（１）の両端をリング嵌着などで剥離防止処理し
、ケース（３）などを回収し、埋設導管（Ｐ）を復旧接
続した後埋戻す。Once the tube inner surface has been coated and the sealant has been filled into the gaps, cut the tube inner surface coating tube (1) to an appropriate length and attach rings to both ends of the tube inner surface coating tube (1). Peeling prevention treatment is performed, the case (3) etc. are recovered, and the buried conduit (P) is restored and reconnected and then backfilled.
次に別実施例を説明する。 Next, another embodiment will be described.
管内面被覆用筒体（１）を管内に導入するに、公知手法
により管内に通線し、筒状ライニング材（１ａ）の外面
に全面にわたってシール剤含浸状態のスポンジ（１ｂ）
を付設した管内面被覆用筒体（１）を通線により管内に
引込んでもよい。To introduce the pipe inner surface coating cylinder (1) into the pipe, a wire is passed into the pipe by a known method, and a sponge (1b) impregnated with a sealant is applied to the entire outer surface of the cylindrical lining material (1a).
The cylindrical body (1) for covering the inner surface of a tube may be drawn into the tube by passing a wire through the tube.
但し、前述実施例のように反転導入法を採用すると、ス
ポンジ（１ｂ）の肉厚が大で管内面被覆用筒体（１）が
大重量になっても、管が長かったり曲りの多いものであ
っても、容易に管内面被覆用筒体（１）の管内導入を実
行できる。However, if the inverted introduction method is adopted as in the above embodiment, even if the sponge (1b) has a large wall thickness and the pipe inner surface coating cylinder (1) has a large weight, it will not be possible to use a pipe that is long or has many bends. Even in this case, the pipe inner surface coating cylinder (1) can be easily introduced into the pipe.
管の種類はいかなるものでもよく、又、旧い管、新しい
管のいずれでもよい。The tube may be of any type, and may be an old tube or a new tube.
尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
図面は本発明の実施例を示し、第１図は管内面被覆用筒
体の部分斜視図、第２図は施工状態の説明図である。
（Ｉａ）・・・・・・筒状ライニング材、（１ｂ）・・
・・・・スポンジ。The drawings show an embodiment of the present invention, and FIG. 1 is a partial perspective view of a cylinder for coating the inner surface of a tube, and FIG. 2 is an explanatory view of the construction state. (Ia)...Tubular lining material, (1b)...
····sponge.
Claims (1)
に付設した多孔状体に含浸させたシール剤により管内面
に接着させる管内面被覆方法であって、 前記多孔状体としてスポンジ（１ｂ）を用いる管内面被
覆方法。 ２、管内導入後に前記筒状ライニング材（１ａ）の内部
を加圧して、その筒状ライニング材（１ａ）の拡径に伴
って前記スポンジ（１ｂ）を圧縮変形させ、前記スポン
ジ（１ｂ）に含浸させたシール剤を管の亀裂部や管漏洩
部、継手部の少なくとも一部における隙間に押出し注入
し、 その押出し注入したシール剤の逆流を阻止するに必要な
時間、前記筒状ライニング材（１ａ）の内部加圧を継続
する請求項１記載の管内面被覆方法。 ３、筒状ライニング材（１ａ）の内面又は外面に前面に
わたってスポンジ（１ｂ）を付設してある管内面被覆用
筒体。 ４、前記スポンジ（１ｂ）の肉厚が５ｍｍ以上である請
求項３記載の管内面被覆用筒体。[Scope of Claims] 1. A tube inner surface coating method in which a cylindrical lining material (1a) introduced into a tube is adhered to the inner surface of the tube with a sealant impregnated into a porous body attached thereto, comprising: A method for coating the inner surface of a tube using a sponge (1b) as a body. 2. After introduction into the pipe, pressurize the inside of the cylindrical lining material (1a) to compress and deform the sponge (1b) as the diameter of the cylindrical lining material (1a) expands, so that the sponge (1b) The cylindrical lining material ( The method for coating the inner surface of a tube according to claim 1, wherein the internal pressurization of step 1a) is continued. 3. A cylindrical body for covering the inner surface of a tube, in which a sponge (1b) is attached to the inner or outer surface of the cylindrical lining material (1a). 4. The tube inner surface coating cylinder according to claim 3, wherein the sponge (1b) has a wall thickness of 5 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32863789A JPH03187724A (en) | 1989-12-18 | 1989-12-18 | Coating of inner face of pipe and cylindrical body for coating of inner face of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32863789A JPH03187724A (en) | 1989-12-18 | 1989-12-18 | Coating of inner face of pipe and cylindrical body for coating of inner face of pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03187724A true JPH03187724A (en) | 1991-08-15 |
Family
ID=18212488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32863789A Pending JPH03187724A (en) | 1989-12-18 | 1989-12-18 | Coating of inner face of pipe and cylindrical body for coating of inner face of pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03187724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5520484A (en) * | 1995-02-03 | 1996-05-28 | Shonan Gosei-Jushi Seisakusho K.K. | Eversion nozzle, and a method for repairing an underground tubular conduit |
| US7121766B2 (en) | 2000-06-27 | 2006-10-17 | Terre Hill Silo Company | Inflatable underground structure liner |
-
1989
- 1989-12-18 JP JP32863789A patent/JPH03187724A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5520484A (en) * | 1995-02-03 | 1996-05-28 | Shonan Gosei-Jushi Seisakusho K.K. | Eversion nozzle, and a method for repairing an underground tubular conduit |
| US7121766B2 (en) | 2000-06-27 | 2006-10-17 | Terre Hill Silo Company | Inflatable underground structure liner |
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