WO2000060273A1 - Structure de revetement interieur d'un tube de canalisation et procede d'elimination - Google Patents

Structure de revetement interieur d'un tube de canalisation et procede d'elimination Download PDF

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Publication number
WO2000060273A1
WO2000060273A1 PCT/JP2000/001946 JP0001946W WO0060273A1 WO 2000060273 A1 WO2000060273 A1 WO 2000060273A1 JP 0001946 W JP0001946 W JP 0001946W WO 0060273 A1 WO0060273 A1 WO 0060273A1
Authority
WO
WIPO (PCT)
Prior art keywords
lining
pipe
lining tube
tube
line pipe
Prior art date
Application number
PCT/JP2000/001946
Other languages
English (en)
Japanese (ja)
Inventor
Norio Takei
Original Assignee
Wamonde Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wamonde Co., Ltd. filed Critical Wamonde Co., Ltd.
Publication of WO2000060273A1 publication Critical patent/WO2000060273A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe

Definitions

  • the present invention relates to a lining structure of a line pipe and a method of removing a lining.
  • the present invention relates to a line pipe lining structure suitable for being applied to a pipe line for transporting an abrasive fluid containing earth and sand, coal and ore particles, and a method of removing the lining when replacing a worn lining or the like. It is about. Background art
  • business revenues from hydropower, coal slurry transportation, desert greening, etc. In order to improve profitability, extending the service life of the headrace is an extremely important issue.
  • the inventor proposed the invention according to Japanese Patent Application Laid-Open No. 1-307597 for the purpose of perpetuating the useful life of the line pipe and, consequently, the pipeline.
  • This is because the pipe is lined with a lining tube, and in order to increase the exchangeability when the lining tube is worn, the adhesion between the inner surface of the pipe and the lining tube is reduced without using an adhesive that dries and solidifies.
  • adhesive is applied, and in the other parts, the air between the lining tube and the pipe is removed, and the lining tube is pressed against the pipe peripheral surface under the action of atmospheric pressure.
  • removal of the lining tube is based on peeling of the lining tube from the pipe by pressurizing air between the pipe and the lining tube, and then pulling out the old lining tube from the pipe And pulling in the new lining tube.
  • the present invention is a further improvement of the above-mentioned proposed technology of the inventor from the following viewpoints.
  • the cost of the lining tube is advantageously reduced, the economic efficiency is improved, and the work of removing the lining tube is performed. It is intended to increase the efficiency of the lining and, preferably, to predict the wear life of the lining tube, thereby facilitating the preparation in advance.
  • the amount of wear in the circumferential direction varies greatly depending on the specific gravity of the granules, the particle size, the mixing ratio of the granules, and so on. Changing the circumferential thickness of the lining tube in accordance with the amount of wear reduces the tube cost. It can be reduced and more economical.
  • the length of the pipeline for desert greening and coal slurry transport can be hundreds of kilometers to over 1,000 kilometers, and the worn lining tube must be peeled off in a short period of time over such a long distance. .
  • the length of a water-powered water transmission pipe is several tens of kilometers, and a shorter time of stripping is required to shorten the power generation stoppage time. It takes too long.
  • the line pipe lining structure according to the present invention is a line pipe having a lining tube arranged along the inner peripheral surface of the pipe, wherein the thickness of the lining tube is reduced in the circumferential direction by the amount of wear caused by the transport fluid. According to this, the part with a large amount of wear is made thicker and the part with a small amount of wear is made thinner. According to this, after the line pipe has been used for a certain period, the lining tube has reached the end of wear. The remaining wall thickness in the circumferential direction can be made substantially uniform over the entire circumferential direction, so that no excess wall thickness remains in a specific portion of the lining tube. Economic efficiency can be advantageously improved while reducing tube costs and improving raw material yields.
  • a polyurethane rubber layer having a color different from that of the lining tube is provided on the outer peripheral surface of the lining tube made of soft rubber, and more preferably, the thickness of the urethane rubber layer is set to about one. According to this, complete wear of the lining tube can be confirmed by exposure of the urethane rubber layer, and by predicting the wear of the urethane rubber layer having a specific thickness, the replacement time of the lining can be easily and easily determined. Can be accurately predicted. Since the amount of wear of the urethane rubber differs in the circumferential direction, it is preferable to change the thickness of the urethane rubber layer in proportion to the amount of wear in the circumferential direction.
  • the end portions of the lining tube are peeled off from the pipes, and the end portions are tightened to the respective negative pressure suction tubes inserted into the end portions thereof, and then the air in the lining tube is passed through the negative pressure suction tube. Suctioning and introducing atmospheric pressure between the lining tube and the pipe to separate the lining tube from the pipe over its entire length.
  • FIG. 1 is a cross-sectional view showing an embodiment of the present invention without a pipe.
  • FIG. 2 is an axial partial cross-sectional view showing a separation process of the lining from the pipe.
  • FIG. 1 shows an embodiment in which a lining structure according to the present invention is shown in a cross section except for an outermost line pipe.
  • reference numeral 1 denotes a lining tube.
  • This lining tube 1 made of soft rubber moves from top to bottom It has a circular tube shape whose wall thickness gradually increases.
  • the manufacture of such a lining tube 1 is performed, for example, by measuring the wall thickness of each part in the circumferential direction within the cross section of the worn conventional steel pipe, and measuring the wall thickness of the lining tube 1 so as to be proportional to the wear ratio in the circumferential direction. This is performed by specifying the thickness in the circumferential direction, extruding soft rubber to a length of usually 2 km using an extrusion die manufactured based on this, and continuously vulcanizing and curing it. Can be.
  • a urethane rubber layer 2 having a uniform thickness, for example, a thickness of 1 mra and having a different color from that of the lining tube 1 is adhered to the outer periphery of the lining tube 1, preferably to the outer peripheral surface of the tube.
  • the urethane rubber layer 2 can of course be formed by co-extrusion with the lining tube 1, but can also be added after the lining tube 1 has been vulcanized and cured.
  • the center axis of the lining tube 1 subjected to the primer treatment is oriented vertically, and the urethane rubber is applied to the outer peripheral surface of the lining tube 1 while maintaining the thickness of the lining tube 1. It is preferable to prevent unevenness in film thickness on the upper, lower, and side surfaces.
  • the excess dripping of the urethane rubber is wiped off, and then the urethane rubber is vulcanized and cured to form an outer periphery of the lining tube 1 as shown in FIG.
  • the urethane rubber layer 2 can be joined to the surface with a substantially uniform thickness over the entire circumference.
  • the outer peripheral surface of the urethane rubber layer 2 is further reinforced with a reinforcing sheet 3 so that the action of external force from the inner peripheral side and the outer peripheral side of the lining tube 1 is achieved.
  • deformation of the lining tube 1 in the circumferential and axial directions is sufficiently restrained, and at the same time, the lining tube 1 is effectively prevented from rubbing against the inner circumferential surface of the pipe.
  • the lining tube 1 When a specific abrasive fluid of interest is transported in a line pipe having a lining having such a configuration, the lining tube 1 is provided with an amount corresponding to its circumferential thickness during a certain period of use. Wear will be experienced. In this case, if the lining tube 1 is worn substantially evenly over its entire circumference, the lining tube 1 which is normally black Instead, for example, the urethane rubber layer 2, which has become light red, will be exposed on the inner peripheral surface, and this fact can be confirmed by regular endoscopy and the like from a monitoring branch pipe. However, it is possible to clearly recognize that the line pipe liner replacement time is approaching.
  • urethane rubber has excellent abrasion resistance, and if the thickness of the urethane rubber layer 2 is 1 mm, it can be used for one to two years after it is exposed. By manufacturing a new lining tube 1 during the grace period, the lining tube 1 can be easily and reliably prepared for replacement.
  • the adhesive is first applied to the inner peripheral surface of the line pipe 4 with both ends.
  • a lining tube 1 having a portion adhered, more precisely, a lining 4 composed of a urethane rubber layer 2 and a reinforcing sheet 3 as shown in FIG. From the flange positions at both ends of 5, peel off the peripheral surface of the pipe against the adhesive force of the adhesive, and then seal each end to the negative pressure suction pipe 6 inserted there, for example, with a string 7.
  • the vacuum inside the lining 4 is removed by suction, for example, with a vacuum pump 8 connected to the respective negative pressure suction pipes 6, and the air is drawn between the pipe 5 and the lining 4.
  • a vacuum pump 8 connected to the respective negative pressure suction pipes 6, and the air is drawn between the pipe 5 and the lining 4.
  • the lining can be performed much easier and in a shorter time than when air is injected between the lining 4 and the pipe 5. 4 can be completely separated from pipe 5
  • the thickness of the lining tube in the circumferential direction is adjusted to the rate of wear in the circumferential direction due to the abrasive fluid, so that the lining tube made of soft rubber is not worn away and the urethane rubber layer is exposed. This is almost the same period, with no difference in the circumferential direction. Therefore, when the urethane rubber layer is exposed, a wide area in the circumferential direction is exposed, making it easy to find. If the inside of the pipe is regularly checked with an endoscope from the monitoring branch pipe installed at an appropriate position in the pipeline, the exposure of the urethane rubber layer of a different color to the black lining tube can be easily found. So don't overlook.
  • the lining tube is worn out, and preferably, only the urethane rubber layer and the reinforcing sheet remain. However, the reinforcing sheet is hardly worn and so can be reused.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

L'invention concerne une structure de revêtement intérieur d'un tube de canalisation dans laquelle l'épaisseur de la paroi d'un tube de revêtement intérieur (1) disposé le long de la surface périphérique interne d'un tube est augmentée autour de la périphérie du tube en fonction de l'importance de l'usure dudit tube causée par le fluide à acheminer. La durée de vie du tube de revêtement intérieur peut ainsi être prolongée indéfiniment, ce qui en réduit le coût et augmente le rendement.
PCT/JP2000/001946 1999-03-30 2000-03-29 Structure de revetement interieur d'un tube de canalisation et procede d'elimination WO2000060273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11089058A JP2000283383A (ja) 1999-03-30 1999-03-30 ラインパイプのライニング構造およびライニングの取外し方法
JP11/89058 1999-03-30

Publications (1)

Publication Number Publication Date
WO2000060273A1 true WO2000060273A1 (fr) 2000-10-12

Family

ID=13960266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/001946 WO2000060273A1 (fr) 1999-03-30 2000-03-29 Structure de revetement interieur d'un tube de canalisation et procede d'elimination

Country Status (2)

Country Link
JP (1) JP2000283383A (fr)
WO (1) WO2000060273A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002098633A1 (fr) * 2001-06-04 2002-12-12 Nagai Kosho Co., Ltd. Procede de chemisage de conduites et procede de remplacement de revetement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101413486B1 (ko) 2013-10-25 2014-07-01 (주)신성 다각형 플랜지를 구비한 파형강관 및 그 제조방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167156A (ja) * 1982-03-29 1983-10-03 住友電気工業株式会社 管内面被覆用チユ−ブ
JPS62140682A (ja) * 1985-12-13 1987-06-24 バイオ―キル・ケミカルズ・リミテッド パイプに裏張りを形成する方法及びパイプ
JPS63235797A (ja) * 1987-03-25 1988-09-30 三井東圧化学株式会社 耐蝕複合管
US4995427A (en) * 1988-06-30 1991-02-26 Metalpraecis Berchem & Schaberg Gesellschaft Fur Metallformgebung Mit Beschrankter Haftung Pipe section, especially for abrasive and/or corrosive material pipelines
JPH08301446A (ja) * 1995-05-09 1996-11-19 Nippon Flaekt Kk ごみ輸送管

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167156A (ja) * 1982-03-29 1983-10-03 住友電気工業株式会社 管内面被覆用チユ−ブ
JPS62140682A (ja) * 1985-12-13 1987-06-24 バイオ―キル・ケミカルズ・リミテッド パイプに裏張りを形成する方法及びパイプ
JPS63235797A (ja) * 1987-03-25 1988-09-30 三井東圧化学株式会社 耐蝕複合管
US4995427A (en) * 1988-06-30 1991-02-26 Metalpraecis Berchem & Schaberg Gesellschaft Fur Metallformgebung Mit Beschrankter Haftung Pipe section, especially for abrasive and/or corrosive material pipelines
JPH08301446A (ja) * 1995-05-09 1996-11-19 Nippon Flaekt Kk ごみ輸送管

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002098633A1 (fr) * 2001-06-04 2002-12-12 Nagai Kosho Co., Ltd. Procede de chemisage de conduites et procede de remplacement de revetement

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JP2000283383A (ja) 2000-10-13

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