JP6656745B2 - Composite pipe and method for producing the same - Google Patents

Description

  The present invention relates to a composite pipe and a method of manufacturing the same, and more particularly to a composite pipe as a pipe repair material, or a composite pipe that is temporarily configured on the ground to allow the passage of drainage and the like during a disaster or the like, and a method of manufacturing the same. It is about the method.

  FIG. 1 shows a case where the present invention is used as a repair material for a pipeline, in which a pipeline 1 is installed between manholes 2 and 2, and the pipeline 1 is deteriorated and causes water leakage or the like. In some cases, the composite pipe 3 of the present invention is installed as a repair material for repairing the damaged portion in the pipeline 1.

  Conventionally, when repairing this kind of pipeline, a composite pipe of fiber and plastic was installed on the inner surface of the pipeline and this was cured, but the present invention combines mortar with this, It was done.

  FIG. 2 shows a pipe temporarily laid on the surface of the ground to pass drainage and the like in a disaster or the like, and shows a state where the composite pipe 3 of the present invention is laid along irregularities on the ground surface 4. Things.

  In the past, when temporary pipes were installed on the ground surface to pass this kind of drainage, a flexible hose was laid and drainage was passed here, but in this case, work vehicles etc. When passing, the hose was crushed and the flow of water was obstructed. Therefore, in the present invention, a rigid composite pipe 3 hardened with mortar is installed on the surface of the ground, and an automobile or the like can pass over it.

  Japanese Patent Application Laid-Open No. 2012-127381 (Patent Document 1) discloses that a tubular repair material impregnated with a curable resin liquid is inserted into a pipe while the inner and outer surfaces thereof are inverted, and the curable resin liquid is removed. A method is shown in which a mortar is filled between a pipe and a repair material after curing, and the mortar is cured.

  However, in this method, the mortar is filled and then cured after the curable resin liquid is cured, so when the mortar is filled, the curable resin liquid is already cured, and the surface of the curable resin liquid becomes smooth. Therefore, there is no adhesiveness between the cured curable resin liquid and the mortar, and both are easily peeled off.

  As a method of manufacturing a composite tube using mortar, as shown in Japanese Patent Application Laid-Open No. 55-77529 (Patent Document 2), a belt-shaped body made of a thermoplastic resin and a fiber is wound into a tube, and is wound around the outside thereof. A method is known in which a mortar is applied, and a belt-like body made of a fiber and a resin is wound around the mortar to form a composite tube.

  However, in this method, the composite pipe must be manufactured in a factory, and the length of the composite pipe itself is limited due to its rigidity, so that the composite pipe cannot be inserted into a pipe installed between manholes. It is not possible, and it is not possible to manufacture composite pipes at the site of the disaster, such as at the time of a disaster. Even if it can be manufactured barely, it is impossible to lay a rigid composite pipe along the irregularities at the disaster site.

JP-A-55-77529 JP 2012-127381 A

  The present invention has been made in view of such circumstances, and has a tubular body having a fibrous layer integrated with a hard thermoplastic on its inner surface, and has a tubular fibrous body on its outer surface. It is a composite pipe filled with mortar between a tubular body and a tubular fiber body, and has good adhesion between the tubular body and the tubular fiber body and the mortar, so that both are not peeled off, and the work is performed. It is an object of the present invention to be able to manufacture the composite pipe on site and to easily lay a long composite pipe.

  Thus, the composite tube according to the present invention is characterized in that the tubular fibrous body is formed by integrally forming a woven layer made of fibers inside a tubular fibrous body, outside a tubular body made of a hard thermoplastic plastic. It is characterized in that a smaller diameter cylindrical body is inserted and mortar is filled between the cylindrical fiber body and the cylindrical body.

  In the present invention, it is preferable that a spacer is interposed between the tubular fibrous body and the tubular body. The spacer may be a chip that is interposed between the tubular fibrous body and the tubular body and adhered to one of them. Further, as another spacer, it is also possible to use a tubular wire mesh inserted between the tubular fiber body and the tubular body.

  In the composite pipe of the present invention, it is preferable that the yarn constituting the tubular fibrous body and the woven fabric layer is 10,000 dtex or more. It is also preferable that the tubular fibrous body and the woven fabric layer are made of fluffy fibers.

  In the composite pipe of the present invention, by installing the composite pipe in an existing pipe, the pipe can be lined. It is also possible to install the composite pipe on the ground surface.

  Next, the method for producing a composite pipe according to the present invention comprises the steps of: forming a woven layer of fibers integrally on the outside of a tube made of a hard thermoplastic; Also, a step of inserting a small-diameter cylindrical body, and while heating and pressurizing fluid is fed into the cylindrical body to soften the hard thermoplastic and expand it into a circular cross section, the cylindrical fibrous body also has a cross section. Expanding into a circular shape, cooling the tubular body to make the rigid thermoplastic rigid, and forming a wand form between both ends of the tubular fibrous body and the tubular body. Filling the mortar into the space between the fibrous body and the cylindrical body and curing the mortar.

  In the present invention, a chip is adhered to the outer surface of the tubular body, and the tubular body is inserted into the tubular fiber body and expanded by heating and pressurized fluid into a circular cross section, and the chip is attached to the tubular fiber body. It is preferable that the inner surface of the cylindrical member is brought into contact with the inner surface of the cylindrical member and expanded in a circular shape in cross section, so that the space is formed between the cylindrical fibrous body and the cylindrical body.

  Further, in the present invention, a tubular wire mesh is inserted into the tubular fiber body, and further, the heating and pressurizing fluid is fed into the tubular wire mesh by passing the tubular body into the tubular wire mesh so as to expand into a circular cross section. The outer surface of the tubular body may be brought into contact with the inner surface of the tubular wire mesh, and the gap may be formed between the tubular fiber body and the tubular body by the tubular wire mesh.

  In the method for manufacturing a composite pipe of the present invention, when the composite pipe of the present invention is used as a lining of a pipeline, a tubular fiber body having a tubular body inserted therein is inserted into an existing pipeline, and It is preferable that the cylindrical body is expanded to have a circular cross section so as to be rigid, and the mortar is filled in a space between the cylindrical fiber body and the cylindrical body.

  In the case where the present invention is to be used for lining a pipeline, the tubular fiber body is inserted into an existing pipeline, the tubular body is inserted into the tubular fiber body, and the tubular body is formed into a circular cross section. It is also possible to inflate the material to make it rigid and fill the space between the tubular fibrous body with the mortar to fill the space between the tubular fibrous body and the tubular body.

  Further, in the method for manufacturing a composite pipe of the present invention, when the composite pipe of the present invention is installed on the ground, the tubular fibrous body is installed on the ground surface, and the tubular body is inserted through the tubular fibrous body. Preferably, the tubular body is expanded to have a circular cross section, and the tubular fiber body is made to conform to irregularities on the ground surface, and mortar is filled in a space between the tubular fiber body and the tubular body.

  According to the composite pipe of the present invention, there is a tubular fiber body as the outermost layer, and a woven fabric layer of fibers is exposed on the outer surface of the tubular body as the inner layer, and the tubular fiber body and the woven fabric layer are touched. Since the mortar is filled and hardened in the state, the mortar penetrates into the unevenness of the fabric, so that the adhesive strength is extremely high and the mortar does not easily come off.

  In particular, by using a yarn of 10,000 dtex or more as a yarn constituting the tubular fibrous body, the yarn has large irregularities, and the mortar bites into the yarn, so that the adhesive strength is increased. In addition, by using a fiber having fluff as the tubular fibrous body, the fluff bites into the mortar, so that the amount of adhesion is improved.

  Furthermore, although the outermost layer of the tubular fibrous material hardly passes through the solid content of the mortar, the moisture easily passes through the weave, so that the moisture of the mortar filled in the space passes through the weave of the tubular fibrous material to the outside. The mortar has a high solid content and forms a very strong solid when cured.

  Further, since the mortar is sandwiched between the tubular fiber body and the fabric layer of the tubular body, it does not buckle, and the hard thermoplastic plastic in the tubular body is also covered with the tubular fabric. Therefore, it is difficult to deform.

  According to the method for producing a composite pipe of the present invention, the outermost layer is a flexible tubular fibrous body, and further, the tubular body of the inner layer is formed integrally with the tubular fibrous body on the outer surface of the hard thermoplastic. By heating this, the hard thermoplastic is softened and can be laid along a free path.

  Therefore, at the laying site, the tubular fiber body is laid along a free path, the tubular body is further laid inside, and the mortar is filled in a space between the two tubular bodies, thereby forming a free path. Along the way, the composite pipe of the present invention can be laid.

  Therefore, if the composite pipe of the present invention is laid along the inside of the pipeline, it can be used as a lining of the pipeline, a strong lining is formed in the pipeline, and even if there is a damaged portion in the pipeline, etc. It can be surely repaired.

  In addition, if it is laid along irregularities on the ground surface at a disaster site or the like, it can be laid as a temporary drain pipe or the like. This drain pipe is strong against external force, and can sufficiently withstand a truck or the like passing over it.

Central longitudinal sectional view of a state in which the composite pipe of the present invention is used as a pipe lining Central longitudinal sectional view of the state where the composite pipe of the present invention is installed on the ground surface Cross-sectional view of the composite pipe of the present invention Central longitudinal sectional view of the composite pipe of the present invention Central longitudinal sectional view of a state where a cylindrical wire mesh is used as a spacer in the composite pipe of the present invention. Central longitudinal sectional view showing a method for manufacturing a composite pipe of the present invention. Central longitudinal sectional view showing a method of manufacturing a composite pipe of the present invention using a cylindrical wire mesh as a spacer.

  Hereinafter, the present invention will be described with reference to the drawings. 3 and 4 are a horizontal sectional view and a central vertical sectional view showing the composite pipe 3 of the present invention, and FIG. 6 shows steps of a method of manufacturing the composite pipe 3 of the present invention.

  3 and 4, reference numeral 5 denotes a tubular fibrous body, which is preferably a high-strength fiber such as nylon or polyester. In particular, it is preferable to use a thick yarn of 10,000 dtex or more as the warp and weft. Further, it is preferable to use a yarn having fluff, such as a spun yarn or a crimped yarn.

  Preferably, the tubular fiber body 5 is a tubular woven fabric obtained by weaving fibers into a tubular shape, but may be a flat woven fabric rolled into a tubular shape and sewn.

  The tubular body 6 is inserted into the tubular fiber body 5. The tubular body 6 is formed by integrally forming a woven layer 8 made of woven fibers on the outside of a tubular body 7 made of a hard thermoplastic.

  The woven fabric layer 8 in the tubular body 6 is preferably a woven fabric in which the same yarn as the tubular fiber body 5 is woven in a tubular shape. Since it is not exposed to the mortar and the external pressure does not act when filling the mortar, the mortar may not necessarily be woven in a tubular shape, and may be, for example, a flat woven fabric rolled. . The tube 7 is made of a hard thermoplastic plastic, for example, a hard vinyl chloride resin.

  The tubular body 6 covers the tubular body 7 by, for example, extrusion molding to the outside of the tubular fabric layer 8, and then heats and pressurizes the tubular body 7 to soften the tubular body 7 while extruding the inner and outer surfaces. It is formed by inversion.

  Further, as another method of forming the tubular body 6, a textile layer 8 is put on the outside of a tubular body 7 formed by extrusion molding, and a heated and pressurized fluid is fed into the tubular body 7 to form the tubular body 6. The tube 7 can be formed by heating and softening the tube 7 and expanding the diameter of the tube 7 so that the plastic of the tube 7 is pressed into the fabric layer 8 on the outer side of the tube 7 so that the plastic is firmly adhered.

  Then, chips 9 as spacers are adhered to the outer surface of the cylindrical body 6 at predetermined intervals in the circumferential direction and the length direction, and the interval between the cylindrical fibrous body 5 and the cylindrical body 6 is set to the entire circumference. It is kept uniform over the entire length. The material of the chip 9 is not particularly limited, and for example, a polystyrene foam or the like can be used. Further, the chip 9 can be bonded to the inner surface of the tubular fiber body 5.

  A mortar 10 is filled and hardened between the tubular fiber body 5 and the tubular body 6.

  The place where the composite pipe 3 of the present invention is installed is not particularly limited. If it is formed in the pipeline 1 buried underground, it becomes a lining of the pipeline 1 and water leakage from a damaged portion of the pipeline 1 can be prevented.

  In addition, by installing the composite pipe 3 of the present invention on the ground surface 4, it can be used as a temporary drain pipe in the event of a disaster, etc., even if the ground surface 4 has some irregularities. Can be laid along.

  Next, a method for manufacturing the composite pipe 3 of the present invention will be described with reference to FIG. FIG. 6A shows a state where the tubular body 6 is inserted into the tubular fiber body 5. The tubular body 6 is formed by integrally forming the woven fabric layer 8 on the outside of a tubular body 7 made of a hard thermoplastic, and is provided on the outer surface of the woven fabric layer 8 at predetermined intervals in a circumferential direction and a longitudinal direction. In each case, a chip 9 as a spacer is bonded.

  Thus, both ends of the cylindrical body 6 are sealed with lids 11, a fluid inlet pipe 12 is attached to one of the lids 11, and a fluid discharge pipe 12 is attached to the other lid 11. A tube 12 'is attached.

  Then, the heated and pressurized fluid is fed into the cylindrical body 6 from the fluid inlet pipe 12 and discharged from the fluid discharge pipe 12 ′. As shown in FIG. It is expanded in a circular shape and pressed against the inner surface of the tubular fiber body 5 via the tip 9. As a result, a uniform interval 13 is formed between the tubular fiber body 5 and the tubular body 6 over the entire length by the chip 9.

  At this time, the hard thermoplastic plastic of the tubular body 7 in the tubular body 6 is heated and softened, which expands the diameter itself and expands the woven fabric layer 8, and further cuts the tubular fiber body through the tip 9. It inflates in a circle.

  Next, the heating / pressurizing fluid sent from the fluid inlet pipe 12 is switched to a cooling fluid such as cold air to cool the tubular body 6 and cool the hard thermoplastic plastic constituting the tubular body 7, Make it rigid.

  Next, the lid 11 is removed from both ends of the cylindrical body 6, and as shown in FIG. 6C, the end form 14 is formed between both ends of the cylindrical fibrous body 5 and the cylindrical body 6. The mortar filling tube 15 is attached to the end form 14, and the mortar 10 is filled from the mortar filling tube 15 into the space 13 between the tubular fiber body 5 and the tubular body 6 and cured.

  When the composite pipe 3 of the present invention is to be used as a lining of the pipe 1 buried in the ground, the tubular fiber 5 is inserted into the existing pipe 1 and The heating and pressurizing fluid is fed into the tubular body 6 to expand the tubular fiber body 5 into a circular cross section, and the tubular fiber body 5 is also expanded to extend the existing pipe line 1. Press against the inner surface of

  Then, the mortar 10 is press-fitted into the space between the tubular fiber body 5 and the tubular body 6 to expand the tubular fiber body 5 and press the mortar 10 against the inner surface of the pipe 1. By doing so, it is possible to form a lining of the pipeline 1 by the composite pipe 3.

  When the composite pipe 3 is installed on the ground, the tubular fibrous body 5 is installed on the ground surface 4 as it is, and the tubular body 6 is inserted into the tubular fibrous body 5. The tubular fiber body 5 is made to conform to the unevenness of the ground surface by injecting a heated and pressurized fluid into the air to expand the tubular fiber body 5.

  The mortar 10 is press-fitted into the space between the tubular fibrous body 5 and the tubular body 6 to expand the tubular fibrous body into a circular cross-section. A composite pipe 3 can be laid on top.

  Next, another embodiment of the present invention will be described with reference to FIGS. In FIG. 5, a tubular body 6 is inserted into a tubular fibrous body 5, and the tubular body 6 is composed of a tubular body 7 and a fabric layer 8, which is exactly the same as the previous example.

  A tubular wire mesh 16 as a spacer is interposed between the tubular fiber body 5 and the tubular body 6, and the tubular wire mesh 16 allows the tubular fiber body 5 and the tubular body 6 to be interposed. The distance is kept constant over the entire circumference.

  FIG. 7 shows a method of manufacturing the composite pipe 3 of FIG. FIG. 7A shows a state in which the cylindrical wire mesh 16 is inserted into the tubular fiber body 5, and it is preferable that the cylindrical wire mesh 16 has a coarse mesh and a relatively large unevenness in the thickness direction.

  Next, as shown in FIG. 7B, the tubular body 6 is inserted into the tubular wire mesh 16. The tubular body 6 has a woven fabric layer 8 formed on the outer surface of the tubular body 7 in the same manner as the previous example, and both ends thereof are sealed with lids 11, and fluid is fed into one of the lids 11. A tube 12 is attached.

  Then, as shown in FIG. 7 (c), a heated and pressurized fluid is supplied from the fluid supply pipe 12 to expand the cylindrical body 6 into a circular cross section, and the outer surface thereof is brought into contact with the inner surface of the cylindrical metal mesh 16. Then, the cylindrical wire mesh 16 is also expanded to be brought into contact with the inner surface of the tubular fibrous body 5. As a result, the interval 13 between the tubular fibrous body 5 and the tubular body 6 is maintained at a constant value over the entire circumference by the tubular wire mesh 16.

  Next, as shown in FIG. 7D, an end frame 14 is formed between both ends of the tubular fibrous body 5 and the tubular body 6, and a space 13 between the tubular fibrous body 5 and the tubular body 6 is formed. Is filled with mortar 10 and cured.

DESCRIPTION OF SYMBOLS 1 Pipeline 3 Composite pipe 4 Ground surface 5 Cylindrical fiber body 6 Cylindrical body 7 Tubular body 8 Textile layer 9 Chip 10 Mortar 13 Spacing 14 Wife form 16 Cylindrical wire mesh

Claims (14)

The tubular fibrous body (5) is formed by integrally forming a textile layer (8) formed by weaving fibers inside a tubular fibrous body (5) inside a tubular body (7) made of hard thermoplastic plastic. 5) A composite comprising a tubular body (6) having a smaller diameter inserted therethrough and a mortar (10) filled between the tubular fiber body (5) and the tubular body (6). tube The composite pipe according to claim 1, wherein a spacer is interposed between the tubular fiber body (5) and the tubular body (6). The said spacer is a chip | tip (9) inserted between the said tubular fiber bodies (5) and a tubular body (6), and adhered to either one of them. Composite tube described in 3. The composite pipe according to claim 2, wherein the spacer is a tubular wire mesh (16) inserted between the tubular fiber body (5) and the tubular body (6). 4. 2. The composite pipe according to claim 1, wherein the yarns constituting the tubular fibrous body (5) and the woven fabric layer (8) are 10,000 dtex or more. 3. 6. The composite pipe according to claim 1, wherein the tubular fibrous body and the woven fabric layer are made of fluffy fibers. 7. The composite pipe according to claim 1, wherein the composite pipe is installed in an existing pipeline (1). The composite pipe according to claim 1, characterized in that the composite pipe is installed on the ground surface (4). The tubular fibrous body (5) is formed by integrally forming a textile layer (8) formed by weaving fibers outside a tubular body (7) made of a hard thermoplastic plastic in the tubular fibrous body (5). And a step of inserting a cylindrical body (6) having a smaller diameter than that of the step (a), and feeding a heating and pressurized fluid into the cylindrical body (6) to soften the hard thermoplastic and expand it into a circular cross section. A step of also expanding the tubular fibrous body (5) to have a circular cross section, cooling the tubular body (6) to rigidify the hard thermoplastic; An end frame (14) is formed between both ends of the tubular body (6), and a mortar (10) is placed in a space (13) between the tubular fibrous body (5) and the tubular body (6). A method for producing a composite pipe, comprising the steps of filling and curing. A chip (9) is adhered to the outer surface of the tubular body (6), and the tubular body (6) is inserted into the tubular fibrous body (5) so as to be expanded in a circular cross section with a heating and pressurizing fluid, and The tip (9) is brought into contact with the inner surface of the tubular fibrous body (5) to expand in a circular cross-section, and the gap () is provided between the tubular fibrous body (5) and the tubular body (6). 13. The method for producing a composite pipe according to claim 9, wherein 13) is formed. The heating and pressurizing fluid is fed by inserting a tubular wire mesh (16) into the tubular fiber body (5) and further inserting the tubular body (6) into the tubular wire mesh (16). The cylindrical body (6) is inflated to have a circular cross section, and the outer surface of the cylindrical body (6) is brought into contact with the inner surface of the cylindrical wire mesh (16), and the cylindrical body (6) is placed between the cylindrical fibrous body (5) and the cylindrical body (6). The method according to claim 9, characterized in that the gap (13) is formed by a wire mesh (16). The tubular fibrous body (5) having the tubular body (6) inserted therein is inserted into the existing pipe (1), and the tubular body (6) is expanded to have a circular cross section to be rigid, and The method for producing a composite pipe according to claim 9, characterized in that a gap (13) between the tubular fibrous body (5) and the tubular body (6) is filled with mortar (10). The tubular fibrous body (5) is inserted into the existing pipeline (1), the tubular body (6) is inserted into the tubular fibrous body (5), and the tubular body (6) is cross-sectioned. The composite according to claim 9, characterized in that the mortar (10) is filled into the space (13) between the tubular fibrous body (5) and the tubular body (6) by inflating it in a circular shape to make it rigid. Pipe manufacturing method The tubular fibrous body (5) is placed on the ground surface (4), the tubular body (6) is inserted into the tubular fibrous body (5), and the tubular body (6) is formed into a circular cross section. Inflating the tubular fiber body (5) along the irregularities of the ground surface and filling the space (13) between the tubular fiber body (5) and the tubular body (6) with mortar (10). The method for producing a composite pipe according to claim 9, characterized in that:

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