JP2006150703A - Lining structure of inner surface of pipe line and lining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining structure which prevents the generation of environmentally problematic substances such as a styrene monomer, is mechanically tough, not damaged when acidic or alkaline wastewater flows in it, and resistant to generated hydrogen sulfide, and prevents the hindrance of the lining by underground water during lining and the occurrence of distortion in it and a lining method. <P>SOLUTION: The lining structure of the inner surface of a pipe line is formed from an outer film tube containing a water-impermeable plastic film contacted closely with the inner surface of the pipe line as a main material and a fiber-plastic composite tube contacted closely with the inner surface of the outer film tube. In the fiber-plastic composite tube, the periphery side is formed from a resin-impregnated fiber layer in which a fiber layer containing carbon fibers as a main material is impregnated with an epoxy resin, and the inner surface side is a plastic inner film. The lining method is also disclosed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lining structure and a lining method for an inner surface of a pipe for repairing a drain pipe, particularly an underground pipe.

  As the lining structure of the pipeline, a method of inserting a tubular body impregnated with a curable resin such as an epoxy resin into the pipeline to be repaired while inverting the inner surface of the pipeline and then curing the resin It has been known. (Japanese Patent Laid-Open No. 62-122738)

  Also known is a lining method in which a tubular body provided with a curable polyester resin-impregnated felt layer on the outer peripheral surface of a substrate made of a linear polyester film as a resin is inverted and inserted from one end to cure the curable polyester resin. ing. (Japanese Patent Laid-Open No. 62-122738)

JP-A-62-212738 JP-A-1-148530 Japanese Patent Laid-Open No. 5-16238 JP-A-6-114939 JP 2003-236934 A JP 2003-165138 A JP 2004-148512 A JP 2004-148515 A

  According to Japanese Patent Laid-Open No. Sho 62-1222738, a lining tube is inverted and inserted into a pipe line by fluid pressure. However, when the resin is cured, the lining tube shrinks and is formed between the pipe inner surface. When a gap is formed and the pipe is a drain pipe, there is a risk that the embedded surrounding water may flow in from a joint or a crack formed in the pipe, resulting in a lining failure. The method according to JP-A-1-148530 has the same problem.

  In the method described in JP-A-5-16238, a tubular resin film is inserted into a pipe line, and an uncured resin-impregnated tube with one end sealed is inverted, but a typical technique is polyester as a fiber base material. This is a method in which a tube impregnated with a resin is used and cured by ultraviolet rays. The structure is unsuitable for curing with heated pressure water, and improvements in material strength, curability, curing method, etc. are required.

  The method according to Japanese Patent Application Laid-Open No. 6-114939 is a method of lining by inverting and inserting a gas-tight plastic film coated on the outer peripheral surface of a highly air-tight synthetic fiber nonwoven fabric. The lining strength retention by external pressure and the preferable cured resin and curing method are not clarified.

  Japanese Patent Application Laid-Open No. 2003-236934 describes a method of lining and curing a thermosetting resin composition as a lining material on a pipe line. There is no consideration, and it is limited to using a room temperature curing agent, and is not a general curing method.

  Japanese Patent Laid-Open No. 2003-165138 discloses a lining resin impregnated absorbent material coated with an airtight plastic film and lined with a reverse lining method. However, the strength of the lining material is This is insufficient, and there is concern about the formation of a gap with the pipe due to the influence of intrusion water from the outer surface of the pipe, and there is concern about the long-term smoothness of drainage in the used state after lining.

  The methods described in Japanese Patent Application Laid-Open Nos. 2004-148512 and 2004-148515 require a flange for attaching one end of a tubular resin adsorbent, and are used for the lining of ordinary buried pipes. I can't.

  In addition, when the unsaturated polyester resin is used as the thermosetting resin in the various lining methods described above, volatilization of the styrene monomer, which is a concern for environmental hormones, is not taken into consideration, consideration for workers and residents during the lining process, In addition, there is a problem that consideration is not given to contamination around the pipeline after treatment.

  The problems to be solved are to solve various problems in the conventional lining structure and method, to prevent the generation of environmentally problematic substances such as styrene monomer, and the lining structure is mechanically tough, Even when acidic or alkaline wastewater flows into the lining, it is not affected by hydrogen sulfide that is generated, and the lining is not hindered by water oozing from the ground during lining, and the lining structure The present invention provides a novel lining structure and lining method that do not cause distortion.

The present invention has been made to achieve the above object,
The invention of claim 1 comprises an outer film tubular body mainly composed of a water-impermeable plastic film that is in close contact with the inner surface of the conduit, and a fiber / plastic composite tubular body that is in close contact with the inner surface of the outer film tubular body. The tube is characterized in that the fiber-plastic composite tubular body is formed of a resin-impregnated fiber layer formed by impregnating an epoxy resin into a fiber layer mainly composed of carbon fiber on the outer peripheral side, and a plastic inner film layer on the inner surface side. The lining structure of the road inner surface,
The invention of claim 2 is characterized in that the resin-impregnated fiber layer is obtained by impregnating a composite fiber layer in which a fiber layer mainly composed of carbon fibers and a chopped strand mat are laminated with an epoxy resin. 1 is a lining structure of an inner surface of a pipeline according to 1.
The invention of claim 3 is the lining structure of the inner surface of the pipe line according to claim 1, wherein the resin-impregnated fiber layer is obtained by impregnating a chopped strand mat in which carbon fibers are dispersed with an epoxy resin,
The invention of claim 4 is the lining structure of the pipe inner surface according to claim 1, 2 or 3, wherein the fiber / plastic composite tubular body is integrated by needle punching.
Invention of Claim 5 is the lining structure of the pipe inner surface according to any one of Claims 1, 2, 3 or 4, wherein the plastic inner film layer is a polyurethane film layer,
The invention according to claim 6 is characterized in that the outer film tubular body mainly composed of water-impermeable plastic is obtained by joining an outer water-impermeable plastic film and an inner synthetic fiber base fabric. The lining structure of the pipe inner surface according to any one of claims 1, 2, 3, 4 and 5.

The invention of claim 7 includes a step of inserting an outer film tubular body mainly made of a water-impermeable plastic film into the inside of a pipe line, and a fiber layer whose outer peripheral side is mainly made of carbon fiber and impregnated with an epoxy resin. Inserting a fiber / plastic tubular body made of a cured epoxy resin-impregnated carbon fiber layer with a fiber / plastic composite fiber layer with a plastic inner film layer on the inner periphery, and pressurizing water into the plastic inner film layer Inject while increasing the temperature sequentially by controlling, cure the uncured epoxy resin in the fiber / plastic tubular body, gradually cool the temperature of the pressurized water, expand the diameter of each tubular body, and the inner surface of the pipeline A method for lining the inner surface of a pipe line, characterized in that
The invention of claim 8 includes a step of inserting a tubular body mainly composed of a water-impermeable plastic film into the inside of a conduit, and an epoxy resin-impregnated carbon in which an outer peripheral side is impregnated with an epoxy resin in a fiber layer mainly composed of carbon fibers. A step of inserting a fiber layer and a fiber / plastic tubular body having a plastic inner film layer on the inner peripheral side by filling and pressurizing fluid from one end of the fiber / plastic tubular body while inverting the tubular body; Pressurized water is injected into the film layer while controlling the temperature sequentially to increase the temperature, and after curing the uncured epoxy resin in the fiber / plastic tubular body, the temperature of the pressurized water is gradually cooled to each tubular body. A method of lining the inner surface of the pipe, characterized in that it comprises a step of expanding the diameter of the pipe and bringing it into close contact with the inner face of the pipe.
In the invention of claim 9, a heat-resistant hose is connected to the end of the fiber / plastic tubular body to be reversed, and is inserted into the fiber / plastic tubular body when the fiber / plastic tubular body is reversed.・ Agitating the water in the plastic tubular body, sucking the same amount of water as the discharged water with a suction hose provided in parallel, heating it with a hot water boiler installed outside, and distributing it again to the circulation pump In addition, the temperature is controlled stepwise by linking the hot water boiler and the temperature sensor, and 5-6mm holes are provided in the tube wall of the heat-resistant hose at regular lengths, and the hot water in the fiber / plastic tubular body. 9. The method for lining a pipe inner surface according to claim 8, wherein the lining is caused to convection.

In the present invention, a tubular body mainly composed of a water-impermeable plastic film is used as the outer film in contact with the pipeline, so that there is an effect of blocking intrusion water from the outside of the underground pipe.
In particular, a sheet usually referred to as tarpaulin, for example, a fiber base fabric provided with a synthetic fiber layer in which fibers are contained in a water-impermeable plastic film is preferable because of its high strength.

  The tube constructed inside the outer film has a mechanical strength far more than a felt such as carbon fiber as a resin absorption layer, and is mainly composed of acid- and alkali-resistant fibers. Felt can be added and used. It is impregnated with an epoxy resin that has no adverse effect on the environment such as polyester resin, which does not cause the generation of styrene monomer, so it has a complete barrier property, and it is affected by the acidity and alkalinity of the wastewater flowing through the repaired pipe. Nothing. Furthermore, the layer in which the fiber mainly composed of carbon fiber is impregnated with epoxy resin may be a single layer or a combination of several layers.

Further, a resin impregnated layer obtained by impregnating an epoxy resin into a composite fiber layer obtained by laminating a chopped strand mat on a fiber layer mainly composed of the above-mentioned carbon fiber is used for complete lining of a pipe. Due to the nature of the material, it has excellent mechanical strength in any direction, so that it cooperates with the carbon fiber to ensure the strength of the lining.
If a chopped strand mat in which carbon fibers are dispersed is used, the purpose of the lining can be achieved while achieving the same effect as that obtained by laminating a chopped strand mat on a fiber layer mainly composed of carbon fibers.

The plastic inner film layer on the inner surface side of the fiber plastic tubular body maintains safety when it comes into contact with drainage such as water flowing in the pipeline after the lining treatment, protects the internal lining structure, Further, it is effective in improving the roughness coefficient and recovering the flow loss due to the reduced diameter.
Especially when polyurethane film is used as plastic inner film, it is resistant to friction, tension, etc., withstands weak acidity and weak alkalinity, and prevents organic and inorganic precipitates or precipitated solidified substances contained in sewage from adhering. it can.

As a fiber layer impregnated with an epoxy resin, a chopped strand mat sandwiched between carbon fibers in a sandwich structure, laminated by needle punching, and what is obtained by impregnating an epoxy resin into a tubular shape, In the case where a material that is very strong against external pressure and has higher strength is required, a multilayer structure in which this laminated structure is repeated is preferable.
In addition, when using a carbon fiber dispersion | distribution chopped strand mat, it was recognized that there exists an effect similar to the above, and needle punching processing is not necessarily required depending on a pipe diameter.

In the present invention, since carbon fiber is mainly used, it is far superior to the conventional one in which felt is simply used as a resin-impregnated material. In addition, since it is possible to use other fibers such as those containing a slight amount of felt, it is possible to consider the cost.
In addition, when the chopped strand mat is used in combination, the fibers have no directionality, are omnidirectional, and the glass fiber mat has higher strength than the longitudinal and horizontal cross directions only. The lining can be expected to have high strength.

In addition, the use of an epoxy resin as the resin impregnated therein is more non-shrinkable than a conventionally used curable polyester resin, has excellent adhesion between a cured lining pipe and a conventional pipe, and In addition, it is resistant to sulfuric acid that is easily generated in waste water, and is not affected by hydrogen sulfide.
That is, a pipe line repaired by lining with an epoxy resin-impregnated fiber is rich in water resistance and chemical resistance and has high mechanical strength.

  A water-impermeable plastic film is used for both the outer film and the inner film. Examples of the water-impermeable plastic include polyethylene, polypropylene, nylon, polyethylene terephthalate and the like, but polyethylene and polypropylene are inexpensive, but have a low melting point. However, nylon and polyethylene terephthalate have a high melting point (softening point) and may reach 180 ° C or 250 ° C. Can be advantageously performed. The inner film may be the same film as the outer film, but the polyurethane film is also strong, and it is not particularly destroyed by water. is there. In particular, the roughness coefficient is increased, and the flow loss due to the reduced diameter can be recovered, which is preferable.

In carrying out the present invention, when the resin-impregnated fiber layer and the inner film layer are integrated by needle punching, punching is performed on the rounded edge portion so that the cylindrical shape can be held at that time. Is preferable in terms of shape retention. However, as described above, when the carbon fiber dispersed chopped strand mat is used, it was recognized that the needle punching process is not necessarily required although it depends on the tube diameter.
In addition, the outer film prevents intrusion water from the outside of the pipe, prevents poor curing of the epoxy resin, which is the main material of the lining, and prevents the epoxy resin from flowing out to the outside. Can be prevented.

  In the present invention, the so-called liner in which the epoxy resin-impregnated fiber layer and the inner film are integrated expands by pressurizing a fluid (preferably water) inside, and the tubular body by the outer film is formed on the inner wall of the pipe to be repaired. It is possible to form a lining without any gaps between them, in which case the temperature condition of the water is gradually raised and gradually cooled to distort the constituent materials, particularly the epoxy resin-impregnated fiber layer. There is an effect that it does not occur.

The lining structure of the inner surface of the pipe line according to the present invention has a rational material structure in which the outer film, the fiber / plastic composite, and the inner film are overlapped. Therefore, there is an adverse effect due to the strength of the lining repair pipe and drainage. There is nothing.
Also, from the viewpoint of the lining method, the fiber / plastic composite tubular body is mainly composed of epoxy resin, so it maintains safety to the environment, and it is completely cured by hot water, and the heat after repair A repair tube with less shrinkage can be provided.

The carbon fiber used in the present invention is excellent in acid resistance and alkali resistance, and the strength is very superior to the felt conventionally used as a resin-impregnated fiber material.
Therefore, carbon fiber is the main, and as other fibers blended in it, for example, the fewer felts that have been used in the past, the better. However, just blending reduces the strength and resistance to acids and alkalis. Also decreases. Usually, it is desirable to keep the strength, acid and alkali resistance within the range of 30 parts by weight or less with respect to 100 parts by weight of the carbon fiber.

The chopped strand mat is different from a glass fiber mat in that it has no fiber orientation and is non-directional. Therefore, by using this chopped strand mat in combination, it is possible to reinforce strength in each direction that cannot be obtained with fibers mainly composed of carbon fibers.
That is, by using a composite material that is impregnated with an epoxy resin as a lining material, the mechanical strength, water resistance, and alkali resistance of the repaired pipe line can be ensured.

  The outer film is a tubular body of a film having a thickness of about 200 μm to 1000 μm, such as non-permeable polyethylene, polypropylene, polyethylene terephthalate, nylon, acrylic resin, etc., and water is supplied from the outside of the underground conduit. It has a function of preventing intrusion and preventing the epoxy resin from being cured in the internal epoxy resin-impregnated fiber material. Moreover, since the epoxy resin itself is cured without flowing out, there is no problem of soil contamination.

  Furthermore, the inner film can be made of water-impermeable polyethylene, polypropylene, polyester, nylon, etc., but the polyurethane film is heated by applying water pressure to the interior when repairing the pipeline by lining, and epoxy resin. It is necessary to cure the water pressure and temperature sufficiently, and even when draining after completion of the lining, there is a feature that acid alkali is not violated, and dirt is difficult to adhere, the roughness coefficient increases, The flow loss due to the reduced diameter can be recovered.

As for the epoxy resin, the epoxy resin was said to be difficult to adjust the time for the reaction with the curing agent, but as in the present invention, it is crosslinked with warm water heated stepwise and then slowly cooled. This solves this problem and makes it possible to cure without distortion relatively easily.
In the case of injecting pressurized water into the inner film of the pipeline and pressurizing it, if it is not the reversal method, the temperature-controlled warming water may be injected at a predetermined pressure and circulated to the heating device. When lining is performed by the reversal method, a heat-resistant hose is connected to the end of the reversing liner, and can be inserted simultaneously with reversing the liner.
A hot water discharge hole is opened in the heat resistant hose at equal intervals, and the heat resistant hose is arranged so that the hot water comes out in the entire span. The amount of discharged water is sucked in with a suction hose provided in parallel, heated with a hot water boiler and distributed again with a circulation pump, but stepwise temperature control can be set by interlocking the hot water boiler and temperature sensor .
Conventionally, it has been considered that the resin is crosslinked and cured by steam heating. However, since the temperature cannot be adjusted by steam heating, the epoxy resin may be distorted and cured or sufficiently cured. I can't.
In the present invention, since the temperature of the water is raised stepwise, complete curing can be achieved. However, without using a special stirring device, for example, a hole of about 5 to 6 mm is made in the tube wall of a heat-resistant hose every 1 m. Thus, convection can be generated by the hot water pumped by the circulation pump to make the temperature in the pipe during lining constant, which is very advantageous for curing the epoxy resin.

  As shown in the cross-sectional view of FIG. 1, the repaired drain pipe structure according to the present invention is provided with an outer film tubular body 2 that is in close contact with the inner surface of the pipe line 1 and uses a non-permeable plastic film as a material. A fiber / plastic composite tubular body 3 is provided in close contact with the inside. The fiber / plastic composite tubular body 3 is a resin-impregnated fiber layer 4 formed by impregnating an epoxy resin into a fiber layer whose main material is carbon fiber, and an inner film layer 5 of plastic is formed on the inner surface side thereof. Is provided. As described above, a polyurethane film is preferably used as the plastic inner film layer 5.

A specific example of the resin-impregnated fiber layer 4 will be described with reference to FIG. 2. A fiber mainly composed of carbon fibers may be impregnated with an epoxy resin. The resin impregnated layer 4a and the chopped strand mat 4b are alternately laminated, and those that require further strength are not shown, but the resin impregnated layer 4a and the chopped strand mat 4b are combined. A layer in which a plurality of layers are alternately stacked is used. Reference numeral 5 denotes an inner film layer, which is provided on the resin-impregnated fiber layer 4 in advance or in close contact after the formation of the layer.
Further, another specific example of the resin-impregnated fiber layer 4 will be described with reference to FIG. 3. The entire structure is composed of a carbon fiber-dispersed chopped strand mat 4c, which is simply impregnated with an epoxy resin, as shown in FIG. Curing substantially similar to that shown can be achieved.
In the present invention, the fiber mainly composed of carbon fiber means a fiber that can substantially exhibit the acid resistance and alkali resistance curing of the carbon fiber.
In the present invention, after lining with such a layer structure, the epoxy resin is cured by heat of hot water on the pipe line inside the inner film layer to form a complete lining structure.
As described above, a polyurethane film is preferably used as the inner film.

A specific example of the lining method according to the present invention corresponding to claim 6 will be described with reference to FIGS. 4 to 6. FIG. 4 is a longitudinal sectional view of the initial process, and FIG. 5 is a transverse sectional view of FIG. 6 is a cross-sectional view taken along line YY of FIG.
As shown in FIG. 4, a tubular body having an outer film layer 2 is inserted into a pipe 1, and then an inner film layer such as polyurethane is formed on the inner surface of the tubular body having an epoxy resin-impregnated fiber layer 4. The fiber / plastic composite tubular body 3 in which 5 is integrated is inserted. The insertion of each tubular body into the inside of the pipe line 1 is performed by inserting from one end if the pipe line 1 is short, and inserting it from one end if it is long and pulling it from the other end by a wire or the like. As a result, the state of each tubular body changes from the state of FIG. 5 to the state of FIG. 6, and has a slight gap on the inner surface upper side of the conduit.
Into the fiber / plastic composite tubular body 3 having the epoxy resin-impregnated fiber layer 4 having the inner film layer 5, water whose temperature is gradually raised from room temperature is injected and pressed to cure the epoxy resin, Strain-free curing can be achieved by injecting water and slowly cooling.

  Of the lining method according to the present invention, a specific example of a method corresponding to claim 7 will be described with reference to the longitudinal sectional view of FIG. 7. A tubular body having an outer film layer 2 is inserted into the inside of the conduit 1, and A fiber / plastic composite tubular body 3 in which a polyurethane inner film layer 5 is integrated on one side (which becomes an inner surface) having an epoxy resin-impregnated fiber layer 4 is reversely inserted while applying fluid (mostly air) pressure. Next, water pressure is applied to the inner surface of the pipe, that is, the inner face of the pipe formed by the inner film layer 5. Water is gradually heated from room temperature to cure the epoxy resin, and the warm water is switched to slowly cooled water to achieve distortion-free curing.

  The epoxy resin-impregnated layer is initially uncured and is mixed with a predetermined amount of a curing agent. Preferred curing is, for example, hot water pressurization at room temperature of 25 ° C for 30 minutes, and then hot water pressurization at 30 ° C. 30 minutes, followed by pressurization with hot water at 40 ° C. for 30 minutes. The temperature and time are appropriately determined depending on the type of resin and curing agent and the layer pressure for lining.

Of the lining method according to the present invention, a specific example of the method corresponding to claim 8 will be described with reference to the longitudinal sectional view of FIG. 8. As described above, the fiber / plastic composite tubular body 3 is inverted and inserted into the inside of the conduit 1. In this case, the heat-resistant hose 6 is connected to the end of the fiber / plastic composite tubular body 3 and inserted into the end, and the epoxy resin is cured by water discharged from the discharge port of the heat-resistant hose 6 and injected. .
The discharge port of the heat-resistant hose 6 is perforated on the tube wall at a predetermined interval, and the water inside the fiber / plastic composite tubular body 3 is stirred uniformly by the discharge pressure of water discharged from the discharge port. The temperature is set to allow the epoxy resin to cure uniformly.

  The water injected from the heat-resistant hose 6 is water sucked out in parallel from the suction hose 7 provided separately from the heat-resistant hose 6, and the water is a circulation pump. 8 is used to circulate the inside and outside of the fiber / plastic composite tubular body 3 and to perform stepwise temperature control in conjunction with the temperature sensor by a hot water boiler 9 provided in the circulation path. It will be understood from the example shown in the drawings that the heat-resistant hose 6 and the suction hose 7 are covered and a pipe connected to a pipe line to be repaired is installed.

The cross-sectional view which shows an example of the lining structure of the pipe inner surface of this invention Sectional drawing of an example of the layer structure which integrated the resin impregnation fiber layer and inner film layer which comprise the lining structure of this invention Sectional drawing of other examples of the layer structure which integrated the resin impregnated fiber layer and inner film layer which comprise the lining structure of this invention Longitudinal sectional view of an example of the lining structure of the present invention XX sectional view of FIG. YY sectional view of FIG. Longitudinal sectional view of an example of the method of the present invention Longitudinal cross-sectional illustration of the method of the present invention using a heat-resistant hose

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Outer film layer 3 Fiber / plastic tubular body 4 Epoxy resin impregnation fiber layer 4a Epoxy resin impregnation fiber layer 4b Epoxy resin impregnation chopped strand layer 4c Epoxy resin impregnation carbon fiber dispersion chopped strand layer 5 Inner film layer 6 Heat resistant hose 7 Suction hose 8 Circulation pump 9 Hot water boiler

Claims (9)

An outer film tubular body mainly composed of a water-impermeable plastic film in close contact with the inner surface of the pipe;
It consists of a fiber / plastic composite tubular body in close contact with the inner surface of the outer film tubular body,
The fiber-plastic composite tubular body is characterized in that the outer peripheral side is formed of a resin-impregnated fiber layer formed by impregnating a fiber layer mainly composed of carbon fiber with an epoxy resin, and the inner surface side is a plastic inner film layer Inner lining structure.   2. The pipe inner surface according to claim 1, wherein the resin-impregnated fiber layer is obtained by impregnating a composite fiber layer obtained by laminating a fiber layer mainly composed of carbon fibers and a chopped strand mat with an epoxy resin. Lining structure.   The lining structure for an inner surface of a pipeline according to claim 1, wherein the resin-impregnated fiber layer is obtained by impregnating a chopped strand mat in which carbon fibers are dispersed with an epoxy resin.   4. The lining structure for an inner surface of a pipeline according to claim 1, 2 or 3, wherein the fiber / plastic composite tubular body is integrated by needle punching. 4. The lining structure for an inner surface of a pipeline according to claim 1, wherein the plastic inner film layer is a polyurethane film layer.   The outer film tubular body mainly composed of water-impermeable plastic is obtained by joining an outer water-impermeable plastic film and an inner synthetic fiber base fabric. The lining structure of the pipe inner surface according to any one of 3, 4, and 5. Inserting an outer film tubular body mainly composed of a water-impermeable plastic film into the inside of the pipeline;
A fiber / plastic tube formed by a fiber / plastic composite fiber layer with an inner peripheral side having an uncured epoxy resin-impregnated carbon fiber layer with an epoxy resin impregnated into a fiber layer mainly composed of carbon fiber on the outer peripheral side Inserting the body;
Inject the pressure water into the plastic inner film layer while controlling the temperature to increase the temperature sequentially, cure the uncured epoxy resin in the fiber / plastic tubular body, and gradually cool the temperature of the pressure water, A method for lining a pipe inner surface, comprising the step of expanding the diameter of each tubular body and bringing the pipe inner surface into close contact. Inserting a tubular body mainly composed of a water-impermeable plastic film into the inside of the pipeline;
A fiber / plastic tubular body having an epoxy resin-impregnated carbon fiber layer with an epoxy resin impregnated into a fiber layer with carbon fiber as the main component on the outer peripheral side and a fiber / plastic tubular body having a plastic inner film layer on the inner peripheral side is filled with fluid from one end and pressurized. And inserting the tubular body while inverting it,
After the reverse insertion, pressurized water is injected into the inner film layer while sequentially controlling the temperature to increase the temperature, and after curing the uncured epoxy resin in the fiber / plastic tubular body, the temperature of the pressurized water is gradually cooled. A method for lining the inner surface of a pipe line, comprising the steps of expanding the diameter of each tubular body and bringing it into close contact with the inner face of the pipe line.   A heat-resistant hose is connected to the end of the fiber / plastic tubular body to be reversed, inserted into the fiber / plastic tubular body at the time of inversion, and the water in the fiber / plastic tubular body is discharged by water discharge pressure. Stirring, sucking in the same amount of water as the discharged water with a suction hose provided in parallel, heating with a hot water boiler installed outside, and distributing water again to the circulation pump. Hot water boiler and temperature sensor It is designed to control the temperature stepwise by interlocking with each other, and provide a 5-6mm hole in the tube wall of the heat-resistant hose at regular intervals to generate convection in the hot water in the fiber / plastic tubular body. The method for lining a pipe inner surface according to claim 8.

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