JP2011037198A - Sleeve, method for manufacturing the same, and construction method for repairing pipeline - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sleeve which exerts a sufficient strength for reinforcing a pipeline and suppressing a cost increase. <P>SOLUTION: The sleeve A repairs the inner peripheral surface of the pipeline in such a state that is disposed in the inner part of the pipeline in a state having flexibility, and has a plurality of layers comprising an intermediate layer 2 composed between the outer layer 3 and the inner layer 1, and the outer layer 3 and the inner layer 1. The outer layer 3 and the inner layer 1 are composed by impregnating the resin in a glass fiber, and the intermediate layer 2 is composed by impregnating the resin in an impregnation substrate made of the fiber other than the glass fiber. The resin to be impregnated into the inner layer 1 is a photo-curable resin, and the resin contains a thickening agent. The impregnation substrate made of the fiber other than the glass fiber composing the intermediate layer 2 is formed of an organic-based fiber, and the resin to be impregnated into the impregnation substrate is a photo-curable resin or a thermosetting resin, or the photo-curable resin and the thermosetting resin. The resin to be impregnated into the outer layer 3 is the photo-curable resin or the thermosetting resin, or the photo-curable resin and the thermosetting resin. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sleeve for repairing a deteriorated inner peripheral surface of a pipeline, a method for manufacturing the sleeve, and a method for repairing the inner peripheral surface of a pipeline using the sleeve. is there.

  At present, many pipes such as pipes for sewers, pipes for industrial water, and pipes for agricultural water are laid and used. These pipes may be deteriorated in the inner peripheral surface with an increase in the period of use, or may be displaced in the joints of the pipes constituting the pipes due to ground subsidence or earthquakes. In this way, the pipe with a deteriorated inner peripheral surface may be reduced in strength, and the pipe having a seam shift may be leaked, so that the inner peripheral surface is repaired by lining. It is common.

  Many proposals have been made as a lining method for repairing the inner peripheral surface of a pipeline. Among them, there is a method using a fiber hose impregnated with a resin (see, for example, Patent Document 1). In this method, a fiber hose impregnated with a resin containing a photoinitiator and an organic peroxide is placed in a conduit, and the fiber hose is expanded with compressed air to adhere to the inner wall of the conduit, and UV light is irradiated to the fiber hose. Then, the conduit is lined by curing the resin.

  The fiber hose used when constructing this method is configured by impregnating a photocurable resin into a fibrous reinforcing material in the form of a woven fabric such as glass fiber or synthetic fiber, a needle processed nonwoven fabric, a mat, or a felt shape, and the thickness is It is set to 10 mm or more.

  In the above method, a fiber hose (sleeve) impregnated with a photocurable resin is used. In addition, a sleeve in which a fiber base material is impregnated with a thermosetting resin, or a photocurable resin and a thermosetting resin are impregnated. A lining layer is also formed using a sleeve that has been removed (see, for example, Patent Document 2). The present invention relates to a lining material for pipe rehabilitation containing both a photocurable resin and a thermosetting resin, wherein a photocurable resin layer is provided on the inner peripheral surface side, and a thermosetting resin layer is provided on the outer peripheral surface side. It is formed.

  When the pipeline is rehabilitated using the lining material described in Patent Document 2, after the lining material in an uncured state is brought into close contact with the inner wall surface of the pipeline, the light source travels and reacts with the light when irradiated. Then, the inner photo-curing resin starts to cure and simultaneously generates heat. This heat is transmitted to the outer thermosetting resin and the thermosetting resin is cured, so that the entire lining material is cured and the pipe line can be rehabilitated.

  The lining material described in Patent Document 2 is configured by impregnating a mat base material made of glass fiber, polyester fiber or the like with a resin. In particular, Patent Document 2 describes that a lining material may be made into two layers by superimposing a base material impregnated with a photocurable resin and another base material impregnated with a thermosetting resin. ing. In this case, the lining material can be cured by irradiating the lining material with light and curing the thermosetting resin by reaction heat generated when the photocurable resin is cured.

  By implementing any of the methods described in Patent Documents 1 and 2 above, it is possible to improve the strength of the pipe line where the inner peripheral surface is deteriorated and the strength is lowered, and the two manholes are continuously connected. By repairing with the lining layer, water leakage can be prevented even when there is a deviation in the joints of the pipes constituting the pipe line.

JP 2003-048248 A JP 2003-033970 A

  As described in each patent document, a lining material for repairing a pipe line uses glass fiber of a predetermined thickness or a synthetic fiber as an impregnated base material. However, when the cured lining layer exhibits high strength, glass is used. It is common to impregnate a fiber with a photocurable resin. However, in this case, there is a drawback that the glass fiber base is expensive and the cost becomes high.

  Moreover, when the nonwoven fabric which consists of fibers other than glass fiber (for example, polyester fiber) is used as the impregnated substrate, the cured lining layer exhibits the strength of only the resin, but the nonwoven fabric does not contribute to the development of strength. For this reason, the strength after curing is small compared to the strength of the lining layer made of glass fiber, and there is a problem that the inner diameter and state of the pipe line to be rehabilitated, so the lining can be increased by increasing the thickness of the nonwoven fabric By ensuring the thickness of the layer (the thickness of the resin), strength can be expressed.

  However, in the case of a photocurable resin, there is a limit (generally about 10 mm) to the depth (thickness) that can transmit light. In particular, when the base material is a non-woven fabric, there is a problem that the irradiated light is freely refracted and does not easily pass through. If the sleeve is thick, it is necessary to use it together with a thermosetting resin. It has become. When a lining material in which a base material impregnated with a photocurable resin and a base impregnated with a thermosetting resin are cured by light, the amount of heat generated is sufficient to cure the thermosetting resin. Various problems such as the amount of the photo-curable resin and the selection of the thermosetting starting material have occurred.

  An object of the present invention is to provide a sleeve that can exhibit sufficient strength to reinforce a pipe line and that can suppress an increase in cost, and a method for manufacturing the sleeve, and a pipe line using the sleeve It is to provide a repair method.

  The present inventor conducted technical development including various experiments on the pipe material in order to repair the pipe line in which the inner peripheral surface deteriorates or the pipe joint is displaced by the sleeve impregnated with the resin. Is going. The following findings were obtained during this process.

  That is, as shown in FIG. 6A, when a diametric force P is applied to a cylinder 50 obtained by expanding and curing an uncured sleeve, this force P is a force that flatly crushes the cylinder 50. In operation, the top and bottom of the cylinder 50 are deformed in the direction of increasing the diameter of the circle, and the both sides are deformed in the direction of decreasing the diameter of the circle. Therefore, at the top and bottom of the cylinder 50, as shown in FIG. 4B, the force C in the compression direction acts on the outer peripheral side 50a of the cylinder 50 and the force T in the tensile direction acts on the inner peripheral side 50b. Become.

  When the force as described above acts, a stress as shown in FIG. 5C is generated in the thickness direction on the top and bottom of the cylinder 50. That is, with the approximate center in the thickness direction as the neutral shaft 51, compressive stress is generated on the outer peripheral side and tensile stress is generated on the inner peripheral side. The stress generated in the cylinder 50 is large on the outer peripheral side 51 a and the inner peripheral side 51 b and small on the periphery of the neutral shaft 51.

  Similarly, at both sides of the cylinder 50, a force in the tensile direction acts on the outer peripheral side, and a force in the compression direction acts on the inner peripheral side. That is, a force in the direction opposite to the top and bottom acts on the outer peripheral portion and the inner peripheral portion of both sides of the cylinder 50, and tensile stress is generated on the outer peripheral side, and compressive stress is generated on the inner peripheral side. The stress is large on the outer peripheral side and the inner peripheral side, and is small around the neutral axis.

  From the above, if the outer peripheral side 50a and the inner peripheral side 50b of the cylinder 50 can exhibit sufficient strength, the periphery of the neutral shaft 51 functions as a sleeve that sufficiently repairs the pipe line even with low strength. It came to the conclusion that it can be demonstrated.

  For this reason, the sleeve according to the present invention is a sleeve that repairs the inner peripheral surface of the pipe line in a state of being flexible and disposed inside the pipe line, and has an outer layer, an inner layer, and the outer layer. It has a plurality of layers composed of an intermediate layer formed between inner layers, the outer layer and the inner layer are configured by impregnating a glass fiber with a resin, and the intermediate layer is an impregnated base material composed of fibers other than glass fibers ( Hereinafter, it is simply constituted by impregnating a resin into a “non-glass-impregnated substrate”.

  In the sleeve, the resin impregnated into the glass fiber constituting the inner layer is preferably a photocurable resin, and the resin impregnated into the glass fiber constituting the inner layer preferably further contains a thickener. .

  In any of the above sleeves, the resin impregnated in the non-glass-impregnated base material constituting the intermediate layer is a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin. Preferably, the fibers other than glass fibers constituting the impregnated base material of the intermediate layer are organic fibers, and the resin impregnated into the impregnated base material composed of the organic fibers is a refractive index of light of the organic fiber. More preferably, the resin has a substantially equal refractive index of light.

  In any of the above sleeves, the resin impregnated into the glass fiber constituting the outer layer is preferably a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin.

  Further, in the sleeve, glass fibers impregnated with a resin constituting the inner layer, a non-glass impregnated base material impregnated with a resin constituting the intermediate layer, and a glass fiber impregnated with the resin constituting the outer layer. Each is preferably formed in a cylindrical shape and laminated.

  The sleeve manufacturing method according to the present invention is a manufacturing method for manufacturing any one of the above sleeves, wherein the glass fibers constituting the outer layer are arranged on the outside, and the non-glass-impregnated base material constituting the intermediate layer is arranged on the inside. And forming an outer cylindrical body by integrating the outer cylindrical body and impregnating the outer cylindrical body with a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin, and forming the inner layer An inner cylinder is formed with fibers, and the inner cylinder is impregnated with a photocurable resin, and the inner cylinder is inserted into the outer cylinder while being inverted, and the inner cylinder is inserted into the outer cylinder. It is arranged inside and integrated.

  Further, the pipe repair method according to the present invention is a repair method for repairing the inner peripheral surface of the pipe using any one of the above-mentioned sleeves, and any one of the above-mentioned sleeves is installed inside the pipe to be repaired. The sleeve is expanded and the glass fiber constituting the outer layer is brought close to the inner peripheral surface of the conduit, and then a light irradiation device is inserted into the expanded sleeve to emit light from the light irradiation device to the sleeve. The pipe to be repaired by curing the photocurable resin by moving along the pipe to be repaired while irradiating, or curing the photocurable resin and the thermosetting resin by curing the sleeve. It is characterized by repairing the inner peripheral surface of the.

  The sleeve of the present invention has a plurality of layers comprising an outer layer and an inner layer in which a glass fiber is impregnated with a resin, and an intermediate layer formed between the outer layer and the inner layer and in which a non-glass-impregnated base material is impregnated with a resin. Therefore, when it hardens | cures along the internal peripheral surface of a pipe line, an outer layer and an inner layer can exhibit high bending strength. That is, when a diametrical force is applied to the cured lining layer, the outer layer and the inner layer resist this force, and high stress does not occur in the intermediate layer.

  For this reason, the intermediate layer can be composed of a non-woven fabric made of fibers other than relatively low strength glass fibers, and the outer layer and the inner layer can be composed of high strength glass fibers to exhibit sufficient strength. it can. Therefore, it is possible to reduce the cost of the sleeve by reducing the thickness of the expensive glass fiber layer and securing the entire thickness with fibers other than the relatively inexpensive glass fiber, or the same amount of glass. The strength of the sleeve using fibers can be further increased.

  In addition, when the pipe is repaired by impregnating the glass fiber constituting the inner layer with a photocurable resin, a light irradiation device is arranged inside the sleeve and irradiated with light to cure the sleeve. Therefore, handling during storage and transportation becomes easy, and construction becomes easy.

  In particular, since the resin impregnated into the glass fibers constituting the inner layer contains a thickener, bubbles generated in the cured sleeve can be reduced. For example, when the sleeve is folded and stored or transported in a flat state, the thickness of the corner portion folded flat is uneven, and a thin portion is generated as compared with other portions. And if a sleeve is expanded in this state, the pressure of the inner peripheral side of a thin part will become low especially. At this time, when the resin impregnated in the inner layer does not have high viscosity, air is sucked into this portion, and bubbles are easily generated. However, since the resin impregnated in the inner layer glass fiber contains a thickener, the resin exhibits a high viscosity, prevents air from being sucked and prevents bubbles from being generated.

  In addition, the resin to be impregnated into the non-glass-impregnated base material constituting the intermediate layer is a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin, so that it is photocured by light transmitted through the inner layer. The thermosetting resin is cured by the heat generated when the photocurable resin is cured or the photocurable resin impregnated in the inner layer and the intermediate layer is cured, whereby the sleeve can be cured.

  In particular, when the fiber constituting the non-glass-impregnated base material is an organic fiber, and the resin impregnated in the non-glass-impregnated base material is a resin having a refractive index of light substantially equal to the refractive index of light of the organic fiber, The light irradiated on the inner layer passes through the inner layer and is also irradiated on the intermediate layer. The light irradiated at this time can pass through the intermediate layer because the organic fibers constituting the intermediate layer and the impregnated resin have substantially the same optical refractive index. Even if it is impregnated with a photocurable resin, it can be sufficiently cured.

  In addition, by impregnating the glass fiber constituting the outer layer with a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin, the photocurable resin is cured by the light irradiated to the inner layer, or The thermosetting resin is cured by the heat generated when the photocurable resin is cured, whereby the sleeve can be cured.

  The glass fiber impregnated with the resin constituting the inner layer, the non-glass impregnated base material constituting the intermediate layer, and the glass fiber impregnated with the resin constituting the outer layer are respectively formed in a cylindrical shape and laminated. Thus, a reasonable sleeve can be constructed.

  In the sleeve manufacturing method according to the present invention, the outer tube is formed by arranging the glass fibers constituting the outer layer on the outside and the non-glass-impregnated base material constituting the intermediate layer on the inner side and integrating them by means such as stitching. The body can be formed. The outer cylinder is impregnated with a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin. Moreover, while forming an inner cylinder with the glass fiber which comprises an inner layer, this inner cylinder is impregnated with photocurable resin. Then, the sleeve can be manufactured by inserting the inner cylindrical body into the outer cylindrical body while inverting it, placing the inner cylindrical body inside the outer cylindrical body and integrating them.

  Further, in the pipeline repairing method according to the present invention, any sleeve is placed and expanded inside the pipeline to be repaired, the glass fibers constituting the outer layer are brought close to the inner peripheral surface of the pipeline, and thereafter The photocurable resin is cured by inserting a light irradiation device into the expanded sleeve and moving along the pipeline to be repaired while irradiating the sleeve with light from the light irradiation device, or photocurable The inner peripheral surface of the pipeline to be repaired can be repaired by curing the resin and curing the thermosetting resin to cure the sleeve.

It is a figure explaining the structure of the sleeve which concerns on a present Example. It is a figure explaining the state which folded the sleeve which concerns on a present Example. It is a figure explaining the manufacturing method of the sleeve which concerns on a present Example. It is a figure explaining the manufacturing method of the sleeve which concerns on a present Example. It is a figure explaining the repair method of the pipe line which concerns on a present Example. It is a figure explaining the principle of this invention.

  Hereinafter, preferred embodiments of the sleeve according to the present invention will be described. The sleeve of the present invention is, for example, a pipe line represented by a sewer pipe line whose inner peripheral surface has deteriorated due to long-term use, or a pipe line that is affected by ground subsidence or an earthquake. This is advantageous in that it is used when repairing a pipe line in which a misalignment has occurred in the joint between pipes. In particular, by reducing the amount of high-priced materials that exhibit high strength, the cost can be reduced, or the strength can be improved without reducing the amount of high-priced materials. It is.

  The sleeve for repairing the pipe line has a dimension in which the outer diameter is substantially equal to the inner diameter of the pipe line to be repaired, and is formed in a long shape. The length of the sleeve is not limited as long as it has a length that can be laid between two manholes provided in a pipeline to be repaired. The sleeve is folded and stored in an uncured state of the resin, that is, in a flexible state, and is transported to the construction site for use.

  The sleeve of the present invention focuses on the stress distribution generated in the cylinder when a force that crushes the cylinder is applied in a state of being hardened in a cylindrical shape, and is configured to be able to counteract this stress reasonably. It has been done. For this reason, the outer layer and the inner layer of the sleeve are layers capable of exhibiting high strength, and the intermediate layer formed between these layers is configured as a layer having a relatively lower strength than the outer layer and the inner layer.

  That is, in the sleeve according to the present invention, the outer layer in which the glass fiber is impregnated with the resin, the inner layer in which the glass fiber is impregnated with the resin, and the non-glass-impregnated base material disposed between the outer layer and the inner layer are impregnated with the resin. An intermediate layer, and a plurality of these layers are stacked.

  In the sleeve according to the present invention, the thickness when the inner layer, the intermediate layer, and the outer layer are laminated is not limited, and is set in consideration of conditions such as the diameter of the pipeline to be repaired and the assumed load. The When the thickness of the sleeve is set, the thicknesses of the inner layer, the intermediate layer, and the outer layer are set in accordance with the stress distribution generated in the sleeve.

  As described above, when a diametrical force is applied to the cured sleeve, tensile stress is generated in the inner layer and compressive stress is applied to the outer layer and the force is applied to the portion where the force is applied and the opposite portion. In the side portion which is a direction orthogonal to the above direction, compressive stress is generated in the inner layer and tensile stress is generated in the outer layer. For this reason, it is necessary for the inner layer and the outer layer to be able to exhibit the same strength.

  In the sleeve according to the present invention, when attention is paid only to the stress distribution, the dimensional ratio of the inner layer, the intermediate layer, and the outer layer in the thickness direction of the sleeve is preferably about 1: 4: 1. This has been confirmed by experiments. However, the ratio is not limited, taking into consideration conditions other than strength, for example, conditions for securing the amount of resin to be impregnated, and conditions such as the material to be used, for example, the fibers and density constituting the nonwoven fabric. It is preferable to set appropriately.

  The glass fibers constituting the inner layer and the outer layer are not limited in thickness, and may be a woven fabric (roving cloth) in which long fibers are woven. In the experiments of the present inventors, it has been confirmed that, in the case of a roving cloth alone, sufficient strength is exhibited if the thickness is about 1 mm.

  However, when the glass fiber constituting the inner layer is impregnated with a photocurable resin, in order to ensure the impregnation amount of the photocurable resin, a chopped strand glass is laminated on a roving cloth as the glass fiber to have a thickness of about It is preferable to use one having a thickness of about 3 mm to about 5 mm. Thus, by laminating the chopped strand glass on the roving cloth with the glass fiber constituting the inner layer to obtain an appropriate thickness, it becomes possible to secure the amount of the photocurable resin to be impregnated, and this photocurable resin. It is possible to ensure the amount of heat generated when the is cured.

  The photocurable resin is not particularly limited, and a photoinitiator is contained in the same resin as the photocurable resin impregnated in a sleeve generally used for repairing or rehabilitating a pipeline, for example, an unsaturated polyester resin. It may be.

  It is preferable to add a thickener to the photocurable resin impregnated into the glass fiber constituting the inner layer. The photocurable resin containing the thickener increases in viscosity over time, and it is possible to prevent air from being caught in the sleeve and to prevent generation of bubbles. In particular, the sleeve according to the present invention is folded and flattened in an uncured state, and is stored and transported in this state or in a state wound around a bobbin. For this reason, the thickness at the folded corner is thinner than the thickness of the other parts, and when the sleeve is expanded during construction, the folded part tries to return to the original thickness and the surrounding area There is a problem that air bubbles are generated by entraining air, but this problem can be prevented.

  The non-glass-impregnated base material constituting the intermediate layer may be a base material that can be impregnated with a resin composed of fibers other than glass fibers. Such a non-glass-impregnated base material is preferably a relatively inexpensive non-woven fabric such as mat or felt. Moreover, as a fiber which comprises a non-glass impregnation base material, there exist organic type fibers, such as a polyester fiber and vinylon, These organic type fibers can be used selectively.

  Further, the thickness of the non-glass-impregnated base material constituting the intermediate layer is not limited, and the thickness corresponding to the diameter of the sleeve set in relation to the diameter of the target pipeline to be repaired, the inner layer and the outer layer It is set as appropriate in relation to the thickness of the film. A thickness of about 5 mm to about 10 mm is sufficient for the intermediate layer, but when the diameter of the conduit is about 1500 mm, a sleeve having a thickness of about 20 mm to about 30 mm is used. In this case, the thickness of the intermediate layer is set to about 20 mm.

  The non-glass-impregnated base material constituting the intermediate layer is impregnated with a photocurable resin, a thermosetting resin, or both. The material of the photocurable resin impregnated into the non-glass-impregnated base material is not limited, and it is possible to use a resin having the same material as the resin impregnated into the glass fiber constituting the inner layer. Similarly, the material of the thermosetting resin impregnated in the non-glass-impregnated base material is not particularly limited, and the peroxide used as a starting material is conventionally used depending on conditions such as season and transport distance. It is preferable to set appropriately considering the above.

  The resin impregnated in the non-glass-impregnated base material constituting the intermediate layer preferably has a light refractive index substantially equal to the light refractive index of the organic fiber constituting the non-glass-impregnated base material. For example, when the fiber constituting the non-glass-impregnated base material is a polyester fiber, the resin to be impregnated is preferably an unsaturated polyester resin. As described above, since the optical refractive index of the organic fiber and the resin impregnated is substantially equal, when the light irradiated toward the inner layer passes through the inner layer and reaches the intermediate layer, the light passes through the intermediate layer. It is possible to cure the photocurable resin impregnated in the intermediate layer.

  In particular, the photocurable resin and the thermosetting resin are preferably configured by containing a photoinitiator or a peroxide as a thermal initiator in a resin of the same material (for example, an unsaturated polyester resin). In this way, by configuring the photocurable resin and the thermosetting resin using the same resin, when the inner layer, the intermediate layer, and the outer layer are laminated, the layers are mixed together and irradiated with light. Does not inhibit the permeability. Moreover, the interface which isolate | separates these layers between each layer is not formed, but it is preferable also on intensity | strength.

  The glass fiber constituting the outer layer can exhibit sufficient strength with a roving cloth having a thickness of about 1 mm. In particular, when the resin impregnated in the outer layer is the same resin as the resin impregnated in the intermediate layer, it is not necessary to secure the thickness for the purpose of impregnating the outer layer with the resin, and thus the thickness is sufficient. However, when the resin impregnated in the outer layer is different from the resin impregnated in the intermediate layer, it may be preferable to set the thickness to 1 mm or more in order to ensure a sufficient amount of resin as in the inner layer. is there.

  In the present invention, the sleeve is a non-glass-impregnated base material impregnated with a glass fiber impregnated with a photocurable resin constituting an inner layer, a photocurable resin or a thermosetting resin constituting an intermediate layer, or both resins, A glass fiber impregnated with a photo-curing resin or a thermosetting resin or both constituting the outer layer is formed in a cylindrical shape and laminated.

  There is no limitation on how each layer is formed into a cylindrical shape. Loops are formed by band-shaped glass fibers or band-shaped non-glass-impregnated base material, and the ends are overlapped. By doing so, it can be formed into a cylindrical shape. And it is possible to form a sleeve by impregnating a glass fiber formed into a cylindrical shape and a resin corresponding to the non-glass-impregnated base material and sequentially laminating them.

  Next, an embodiment of the sleeve will be described with reference to the drawings. The sleeve A shown in the figure is formed in a long shape by sequentially laminating an inner layer 1, an intermediate layer 2, and an outer layer 3. The length of the sleeve A is not limited, and has a length that can satisfy the distance between two manholes constituting the pipe to be repaired. The outer diameter of the sleeve A has a dimension substantially equal to the diameter of the inner peripheral surface of the pipe line to be repaired.

  The inner layer 1 constituting the sleeve A is made of glass fiber impregnated with a photocurable resin. This glass fiber is formed by laminating chopped strand glass on a roving cloth, and the thickness is set in a range of about 3 mm to 5 mm. The photocurable resin impregnated in the inner layer 1 contains a thickener made of magnesium oxide (MgO), and is configured so that the viscosity can increase with time.

  A protective film 5 is stuck inside the inner layer 1. The protective film 5 has a function of transmitting light having a wavelength for reacting the photocurable resin impregnated in the inner layer 1 to the inner layer 1 and a function of preventing the resin impregnated in the inner layer 1 from leaching out. As such a protective film 5, a film generally used for the inner surface of a pipe repair sleeve impregnated with a photocurable resin can be used as it is.

  As the non-glass-impregnated base material constituting the intermediate layer 2, felt (nonwoven fabric) made of polyester fibers is used. Moreover, the thickness of the intermediate | middle layer 2 is set in the range of about 5 mm-10 mm. The intermediate layer 2 is impregnated with a photocurable resin and a thermosetting resin. For example, when the intermediate layer 2 is irradiated with light transmitted through the inner layer 1 having a thickness of 5 mm, the photocurable resin reacts with the light and is photocured. The thermosetting resin is cured, and the thermosetting resin can be cured by heat generation when the photocurable resins of the inner layer 1 and the intermediate layer 2 are cured.

  The outer layer 3 is composed of glass fibers impregnated with a photocurable resin and a thermosetting resin. This glass fiber is composed of a single roving cloth and has a thickness of about 1 mm. On the outside of the outer layer 3, there is a function for preventing light having a wavelength for reacting with the photocurable resin impregnated in the outer layer 3 and a function for preventing the resin impregnated in the outer layer 3 from oozing out. A protective film 6 is attached. As such a protective film 6, a film generally used for the outer surface of a sleeve for repairing a pipe line impregnated with a photocurable resin can be used as it is.

  As shown in FIG. 2, the sleeve A configured as described above is stored in an uncured state by being folded flat and transported to a construction site. For this reason, the protective film 5 adhered to the inner side of the inner layer 1 also has a function of preventing the opposing inner layers 1 from adhering to each other when folded. Further, the protective film 6 adhered to the outside of the outer layer 3 can reduce friction between the sleeve A and the inner peripheral surface of the pipe line, and has a function of facilitating handling during construction. ing.

  Next, a method for manufacturing the sleeve A will be described. First, as shown in FIG. 3 (a), the glass fibers constituting the outer layer 3 are arranged outside, and the non-glass-impregnated base material constituting the intermediate layer 2 is arranged inside, as shown in FIG. 3 (b). In this state, the belt-like sheet 10 is formed by stitching the key points and integrating them. Next, as shown in FIG. 3C, the end portions 10a in the width direction of the sheet 10 are overlapped to form a loop shape, and the end portions 10a are sewn so as to be tangled to form the cylindrical body 11. To do. In the cylindrical body 11, the stitched portion of the end portion 10a has a shape in which the end portions 10a of the sheet 10 are brought into contact with each other as shown in FIG. Become.

  After the protective film 6 was adhered to the outside of the cylindrical body 11 formed as described above, a resin to be impregnated inside the cylindrical body 11, that is, a photocurable resin and a thermosetting resin were mixed. Fill and impregnate resin. In this method, one end of the cylindrical body 11 is closed and filled with a resin obtained by mixing a photocurable resin and a thermosetting resin from the other end, and then the other end is fixed. It is possible to apply a conventional impregnation method as it is, in which the cylindrical body 11 is impregnated with the resin filled in this process by closing and passing between a pair of rollers. The conventional method is adopted.

  Next, as shown in FIG. 4 (a), the glass fibers constituting the inner layer 1 are overlapped with each other in the width direction to form a loop, and the overlapped portion is stitched to form the cylindrical body 12. . Then, the protective film 5 is stuck to the outer side of this cylinder 12, and the mixture of photocurable resin and a thickener is impregnated. That is, after sticking a protective film on the outside of the cylinder 12, the mixture of the photocurable resin and the thickener filled therein is impregnated in the same manner as the resin impregnation of the cylinder 11. In this method, the conventional impregnation method can be applied as it is.

  Next, as shown in FIG. 2B, the cylindrical body 12 impregnated with resin is accommodated in an airtight box 15 in a folded state, and one end thereof is passed through a pair of rollers 17. It is exposed from the cylindrical protrusion 15a and attached to the cylindrical protrusion 15a in a state of being expanded and inverted in a cylindrical shape. At this time, when the length of the cylinder 12 is sufficiently large and cannot be accommodated in the box 15, the other end is pulled out from the opening 15 b of the box 15 and the opening 15 b is hermetically closed.

  Further, the cylinder 11 is stretched without being folded, one end thereof is expanded into a cylindrical shape, and is attached to the cylindrical protrusion 15a of the box 15 to which the end of the cylinder 12 is already attached. Thereafter, the cylinders 12 and 11 attached to the cylindrical protrusion 15 a are fixed by the band 16.

  After the cylinders 12 and 11 are fixed to the cylindrical protrusion 15a of the box 15 as described above, compressed air is introduced into the box 15 from the valve 15c. Along with the introduction of the compressed air, a force acts on the end side fixed to the cylindrical protrusion 15a of the cylindrical body 12, and the cylindrical body 12 enters the inside of the cylindrical body 11 while being inverted. At this time, it is preferable to drive the cylinder 17 at a substantially constant speed by driving the roller 17 in the arrow direction. In this way, the protective film 5 on the outside of the cylinder 12 is inverted and positioned on the inside, and the inner layer 1 on the inside of the cylinder 12 is inverted and is in contact with and adhered to the inner surface of the cylinder 11. Turn into.

  By proceeding with the above operations, it is possible to manufacture a long sleeve A in which the protective film 5 is disposed on the inner side and the protective film 6 is disposed on the outer side. When the cylinder 12 is pulled out from the opening 15b of the box 15, the valve 15c is closed and the inside of the box 15 is closed after the cylinder 12 accommodated in the box 15 has been unwound. It is possible to manufacture the sleeve A by repeating the above-mentioned operation again after releasing the pressure and accommodating the cylindrical body 12 that is pulled out by opening the box 15 in a folded state. is there.

  In this embodiment, stitching is adopted as a method for integrating the outer layer 3 and the intermediate layer 2, but as described above, it is not limited to stitching, and a method such as adhesion or welding is selectively adopted. Of course it is possible.

  Next, a method for repairing a pipeline using the sleeve A as described above will be described. First, as shown in FIG. 5A, a sleeve A having flexibility in an uncured state is laid between two manholes C provided in a pipeline B to be repaired. That is, the wire 20 is passed from the manhole on one side to the other manhole, the end portion of the wire 20 is bound to the closed sleeve A and the closed sleeve A is connected. A sleeve A is laid in the manhole on the other side.

  After laying the sleeve A between the two manholes C, the light irradiation device 21 is inserted into the sleeve A from one side (left side in the figure) and the other side (as shown in FIG. The hose 22a connected to the compressor 22 is inserted from the right side of the figure. Then, compressed air set to a predetermined pressure (about 0.05 MPa) is supplied from the compressor 22 to expand the sleeve A. Thereby, in the sleeve A having flexibility, the outer layer 3 is close to the inner peripheral surface of the pipe line B. At this time, it is preferable that the outer layer 3 of the sleeve A is in close contact with the inner peripheral surface of the pipe B, but it is not always necessary to be in close contact, and there is no problem even if a slight gap is formed.

  After the sleeve A is sufficiently expanded, the light irradiation device 21 is turned on, and the sleeve A is moved in the direction of the arrow while irradiating the sleeve A with light. In response to the light irradiated from the light irradiation device 21, the photocurable resin impregnated in the inner layer 1 and the intermediate layer 2 starts to cure, generates heat in response to this reaction, and reacts to the heat at this time. The thermosetting resin impregnated in the intermediate layer 2 and the outer layer 3 starts to cure. Thus, the inner layer 1, the intermediate layer 2, and the outer layer 3 constituting the sleeve A are cured.

  While moving inside the sleeve A with the light irradiation device 21 turned on, the compressed air from the compressor 22 continues to be supplied to the sleeve A, and this compressed air passes through the inside of the sleeve A. The light irradiation device 21 is discharged from the upstream side in the moving direction. Through the passage of the compressed air, heat generated with the curing of the photocurable resin is discharged to the outside of the sleeve A, and an increase in the internal temperature of the sleeve A can be prevented. Therefore, the resin impregnated in the sleeve A is not deteriorated due to an increase in temperature, and stable performance can be exhibited.

  As shown in FIG. 2C, after the sleeve A laid between the two manholes C provided in the pipe B is cured, the ends of the sleeves A protruding from the respective manholes C are cut, It is possible to repair the inner peripheral surface of the pipe B by caulking and stopping water at the contact portion between the inner peripheral surface of the pipe B exposed to the manhole C and the outer surface of the hardened sleeve A. .

  In particular, since the hardened sleeve A exhibits high strength, it is possible to reinforce the pipe B when the strength of the pipe B is lowered, and the joint of the pipes constituting the pipe B In the case where there is a deviation, it is possible to prevent water leakage by repairing across the displaced part.

  The sleeve A according to the present invention is a pipe line represented by a pipe for sewerage, and is advantageous for repairing a pipe line whose inner peripheral surface has deteriorated or strength has decreased due to long-term use. is there.

A Sleeve B Pipeline C Manhole 1 Inner layer 2 Intermediate layer 3 Outer layer 5 Protective film 6 Protective film 10 Belt-like sheet 10a End 11 Tubular body 12 Tubular body 15 Box body 15a Cylindrical protrusion 15b Opening 15c Valve 16 Band 17 Roller 20 Wire 21 Light irradiation device

Claims (9)

A sleeve for repairing the inner peripheral surface of the pipe line in a state of being arranged and cured inside the pipe line in a flexible state,
A plurality of layers comprising an outer layer and an inner layer and an intermediate layer formed between the outer layer and the inner layer;
The outer layer and the inner layer are constituted by impregnating a glass fiber with a resin,
The sleeve is characterized in that the intermediate layer is constituted by impregnating a resin into an impregnated base material made of fibers other than glass fibers.   The sleeve according to claim 1, wherein the resin impregnated into the glass fiber constituting the inner layer is a photocurable resin.   3. The sleeve according to claim 2, wherein the resin impregnated into the glass fiber constituting the inner layer contains a thickener.   The resin to be impregnated into the impregnated substrate made of fibers other than glass fibers constituting the intermediate layer is a photocurable resin, a thermosetting resin, or a photocurable resin and a thermosetting resin. The sleeve described in any one of 1 to 3.   The fibers other than the glass fibers constituting the impregnated base material of the intermediate layer are organic fibers, and the resin impregnated into the impregnated base material composed of the organic fibers is substantially equal to the light refractive index of the organic fiber. The sleeve according to claim 4, wherein the sleeve has a refractive index of 5%.   The resin impregnated into the glass fiber constituting the outer layer is a photocurable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin. sleeve.   The glass fiber impregnated with the resin constituting the inner layer, the impregnated base material composed of fibers other than the glass fiber impregnated with the resin constituting the intermediate layer, and the glass fiber impregnated with the resin constituting the outer layer are each cylindrical. The sleeve according to claim 1, wherein the sleeve is formed and laminated. A manufacturing method for manufacturing the sleeve according to any one of claims 1 to 6,
An outer cylinder is formed by placing and integrating the impregnated base material made of fibers other than the glass fibers constituting the intermediate layer on the outside with the glass fibers constituting the outer layer, and photocuring on the outer cylinder Impregnated with a curable resin or a thermosetting resin, or a photocurable resin and a thermosetting resin,
The inner cylinder is formed with the glass fibers constituting the inner layer and the inner cylinder is impregnated with a photocurable resin,
A sleeve manufacturing method comprising inserting an inner cylindrical body into the outer cylindrical body while inverting the inner cylindrical body and arranging the inner cylindrical body inside the outer cylindrical body. A repair method for repairing an inner peripheral surface of a pipe line using the sleeve according to claim 1,
The sleeve according to any one of claims 1 to 6 is arranged inside the pipeline to be repaired, and the sleeve is expanded to bring the glass fiber constituting the outer layer close to the inner peripheral surface of the pipeline,
Then, the photo-curing resin is cured by inserting a light irradiation device into the expanded sleeve and moving along the pipeline to be repaired while irradiating light from the light irradiation device to the sleeve, or photo-curing A method for repairing a pipeline, comprising: curing a thermosetting resin and curing a thermosetting resin to cure a sleeve to repair an inner peripheral surface of the pipeline to be repaired.

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