JP2016109156A - Composite pipe and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a composite pipe on a construction site and to easily lay the long composite pipe with high adhesiveness of fiber layers and mortar without separation, with respect to the composite pipe having the cylindrical fiber layers on its inner and outer faces, and charging mortar therebetween.SOLUTION: A cylindrical body 6 obtained by integrally forming a woven fabric layer 8 on an outer side of a pipe body 7 composed of hard thermoplastic, is inserted into a cylindrical fiber body 5, and mortar 10 is charged between the cylindrical fiber body 5 and the cylindrical body 6.EFFECT: As the cylindrical fiber body of an outer face and the woven fabric layer formed on an outer face of the cylindrical body are exposed, the mortar is hardened in a state of being kept into contact with the cylindrical fiber body and the woven fabric layer, and the mortar bites into irregularity of the cylindrical fiber, adhesive force is significantly improved.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a composite pipe and a method for manufacturing the composite pipe, and in particular, a composite pipe as a repair material for a pipeline, or a composite pipe configured to allow temporary drainage and the like in the event of a disaster on the ground, and its manufacture. It is about the method.

  FIG. 1 shows a case where the present invention is used as a repair material for a pipeline, where the pipeline 1 is installed between the manholes 2 and 2 and the pipeline 1 is aged and causes water leakage and 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 pipe line 1.

  Conventionally, when repairing a pipe of this type, a composite pipe made of fiber and plastic is installed on the inner face of the pipe and cured, but the present invention combines this with mortar, It is a thing.

  FIG. 2 shows a pipe temporarily laid on the ground surface to allow drainage or the like to pass in the event of a disaster or the like, and shows a state in which the composite pipe 3 of the present invention is laid along the unevenness of the ground surface 4. Is.

  Conventionally, when installing a temporary pipe on the surface of the earth to pass this kind of drainage, etc., a flexible hose was laid and drainage was passed here, but now there is a work vehicle etc. on the hose. As it passed, the hose was crushed and water flow was hindered. Therefore, in the present invention, a rigid composite pipe 3 hardened with mortar is installed on the ground surface, and an automobile or the like can pass over it.

  In JP 2012-127281 A (Patent Document 1), a cylindrical repair material impregnated with a curable resin liquid is inserted into a pipe line while inverting the inner and outer surfaces thereof, and the curable resin liquid is passed through the pipe. A method is shown in which mortar is filled between the pipe line and the repair material after curing, and the mortar is cured.

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

  Also, as a method of manufacturing a composite tube using mortar, as shown in JP-A-55-77529 (Patent Document 2), a belt-like body made of a thermoplastic resin and a fiber is wound into a tubular shape, and on the outside thereof There is known a method in which a composite pipe is formed by applying mortar and winding a strip made of fibers and resin around the mortar.

  However, in this method, the composite pipe must be manufactured at the factory, and since the composite pipe itself is rigid, its length is limited, and it can be inserted into a pipe line installed between manholes. It is impossible, and composite pipes cannot be manufactured at the disaster site in the event of a disaster. Moreover, even if it can barely be manufactured, it is impossible to lay a rigid composite pipe along the unevenness of the disaster site.

JP 55-77529 A JP 2012-127281 A

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

  Thus, the composite tube of the present invention is the above-mentioned tubular fiber body, in which a fabric layer formed by weaving fibers is integrally formed inside the tubular fiber body on the outside of the tubular body made of hard thermoplastic. A cylindrical body having a smaller diameter is inserted, and mortar is filled between the cylindrical fiber body and the cylindrical body.

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

  In the composite pipe of the present invention, it is preferable that the yarn constituting the tubular fiber body and the fabric layer is 10,000 dtex or more. Moreover, it is also preferable that the said cylindrical fiber body and a textile layer consist of a fiber which has fluff.

  In the composite pipe of the present invention, the composite pipe can be used as the lining of the pipe by being installed in the existing pipe. The composite pipe can also be installed on the ground surface.

  Next, the method for producing a composite pipe according to the present invention includes a tubular fiber body in which a fabric layer formed by weaving fibers is integrally formed on the outside of a tubular body made of a hard thermoplastic plastic. A step of inserting a small-diameter cylindrical body, and a heated and pressurized fluid is fed into the cylindrical body to soften the hard thermoplastic plastic and expand it into a circular cross-section, and the cylindrical fibrous body is also cross-sectioned. A step of expanding into a circle, cooling the cylindrical body to stiffen the rigid thermoplastic, and forming a wife mold between both ends of the cylindrical fiber body and the cylindrical body, It is characterized by comprising a step of filling a mortar between the fibrous body and the cylindrical body and curing it.

  In the present invention, a chip is bonded to the outer surface of the cylindrical body, the cylindrical body is inserted into the cylindrical fiber body and inflated into a circular cross-section with a heated and pressurized fluid, and the chip is connected to the cylindrical fiber body. It is preferable that the gap is formed in contact with the inner surface of the tube to expand into a circular cross section, and the gap is formed between the tubular fiber body and the tubular body.

  Further, in the present invention, a cylindrical wire mesh is inserted into the cylindrical fiber body, and further, the cylindrical body is inserted into the cylindrical wire mesh to feed a heated and pressurized fluid into a circular shape in cross section. An outer surface of the cylindrical body can be brought into contact with an inner surface of the cylindrical wire mesh, and the interval can be formed by the cylindrical wire mesh between the cylindrical fiber body and the cylindrical body.

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

  In the case where the present invention is a lining of a pipe line, the cylindrical fiber body is inserted into an existing pipe line, the cylindrical body is inserted into the cylindrical fiber body, and the cylindrical body is circular in cross section. It can also be lined by inflating and stiffening, and filling the gap between the tubular fiber body and the tubular body with mortar.

  In the method for manufacturing a composite tube of the present invention, when the composite tube of the present invention is installed on the ground, the cylindrical fiber body is installed on the ground surface, and the cylindrical body is inserted into the cylindrical fiber body. It is preferable that the cylindrical body is inflated to have a circular cross section, the cylindrical fibrous body is made to conform to the unevenness of the ground surface, and mortar is filled in the interval between the cylindrical fibrous body and the cylindrical body.

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

  In particular, when a yarn having a length of 10,000 dtex or more is used as the yarn constituting the cylindrical fibrous body, large irregularities are generated in the yarn, and the mortar bites into the yarn to increase the adhesive strength. Moreover, since the said fluff bites into mortar by using the fiber which has fluff as said cylindrical fiber body, the adhesion amount improves.

  Furthermore, the outermost cylindrical fibrous body hardly passes the solid content of the mortar, but moisture easily passes through the weave. Therefore, the moisture of the mortar filled in the gap is externally passed through the weave of the cylindrical fibrous body. The solid content concentration of the mortar becomes high, and a solid material with extremely high strength is formed when cured.

  Moreover, 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 in the tubular body is also covered with the tubular fabric. Therefore, it is difficult to deform.

  According to the method for manufacturing a composite pipe of the present invention, the outermost layer is a flexible cylindrical fiber body, and the cylindrical body of the inner layer integrally forms the cylindrical fiber body on the outer surface of the hard thermoplastic plastic. Therefore, by heating this, the hard thermoplastic is softened and can be laid along a free path.

  Therefore, by laying the cylindrical fiber body along the free path at the laying site, further laying the cylindrical body inside, and filling the space between the two cylindrical bodies with mortar, The composite pipe of the present invention can be laid along.

  Therefore, if the composite pipe of the present invention is laid along the inside of the pipe line, it can be used as a lining of the pipe line. Even if there is a damaged part in the pipe line, a strong lining is formed in the pipe line. It can be reliably repaired.

  If it is laid along the unevenness of the ground surface at a disaster site, it can be laid as a temporary drain pipe. This drain pipe is strong against external force and can sufficiently withstand even if a truck or the like passes over it.

Central longitudinal sectional view of the composite pipe of the present invention used as a lining of a pipeline Central longitudinal sectional view of the composite pipe of the present invention 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 the composite pipe of the present invention in a state where a cylindrical wire mesh is used as a spacer 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

  The present invention will be described below with reference to the drawings. 3 and 4 are a transverse sectional view and a central longitudinal sectional view showing the composite pipe 3 of the present invention, and FIG. 6 shows the steps of the method for manufacturing the composite pipe 3 of the present invention.

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

  The tubular fibrous body 5 is preferably a tubular fabric formed by weaving fibers into a tubular shape, but may be a flat fabric that is rolled into a tubular shape and sewn.

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

  The woven fabric layer 8 in the tubular body 6 is preferably a woven fabric in which yarns similar to those of the tubular fibrous body 5 are woven into a tubular shape. However, like the tubular fibrous body 5, the outer side of the composite tube 3 is used. And is not necessarily woven in a cylindrical shape, for example, a flat woven fabric may be rolled. . The tube body 7 is made of hard thermoplastic plastic, and for example, hard vinyl chloride resin is used.

  The tubular body 6 is formed by, for example, covering the tubular body 7 by extrusion molding on the outside of the tubular fabric layer 8, and then feeding the heated and pressurized fluid to soften the tubular body 7, while It is formed by inversion.

  As another method for forming the cylindrical body 6, a fabric layer 8 is placed on the outside of the tubular body 7 formed by extrusion molding, and a heated and pressurized fluid is fed into the tubular body 7 so that the tubular body It is also possible to heat and soften 7 and widen the diameter, and press and bite the plastic of the tubular body 7 into the outer fabric layer 8 to firmly bond it.

  And the chip | tip 9 as a spacer is adhere | attached on the outer surface of the said cylindrical body 6 for every predetermined space | interval in the circumferential direction and the length direction, and the space | interval of the said cylindrical fiber body 5 and the cylindrical body 6 is made into full length of a perimeter. Crawling and holding uniformly. The material of the chip 9 is not particularly limited, and for example, a polystyrene foam can be used. In addition, the chip 9 can be bonded to the inner surface of the cylindrical fiber body 5.

  And between the said cylindrical fiber body 5 and the cylindrical body 6, the mortar 10 is filled and hardened.

  The place where the composite pipe 3 of the present invention is installed is not particularly limited. If it forms in the pipe line 1 embed | buried under the ground, it will become the lining of the said pipe line 1, and it can prevent the leak from the damaged part of the pipe line 1, etc.

  Moreover, 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. Can be laid along.

  Next, the manufacturing method of the composite pipe | tube 3 of this invention is demonstrated based on FIG. FIG. 6A shows a state in which the tubular body 6 is inserted into the tubular fiber body 5. The tubular body 6 is formed by integrally forming the fabric layer 8 on the outside of a tubular body 7 made of a hard thermoplastic plastic, and has a predetermined interval in the circumferential direction and the length direction on the outer surface of the fabric layer 8. Each chip 9 is bonded as a spacer.

  Thus, both ends of the cylindrical body 6 are sealed with a lid 11, a fluid inlet tube 12 is attached to one of the lids 11, and a fluid discharge is provided 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 outlet pipe 12 ', and the cylindrical body 6 is cross-sectioned as shown in FIG. 6B. While inflating into a circle, it is pressed against the inner surface of the cylindrical fibrous body 5 via the tip 9. Thereby, between the cylindrical fiber body 5 and the cylindrical body 6, the chip | tip 9 forms the uniform space | interval 13 over a full length perimeter.

  At this time, the hard thermoplastic of the tubular body 7 in the tubular body 6 is heated and softened, itself expands in diameter and expands the fabric layer 8, and the tubular fibrous body is also cross-sectionalized via the tip 9. It is inflated into a circle.

  Next, the heated and pressurized fluid fed from the fluid feeding pipe 12 is switched to a cooling fluid such as cold air, the cylindrical body 6 is cooled, the hard thermoplastic plastic constituting the tubular body 7 is cooled, Let it be rigid.

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

  Thus, when the composite pipe 3 of the present invention is used as the lining of the pipe line 1 buried in the ground, the tubular fiber body 5 is inserted into the existing pipe line 1 and the tubular fiber body 5 is inserted. The tubular body 6 is inserted into the tubular body 6, and a heated and pressurized fluid is fed into the tubular body 6 to expand it into a circular cross section, and the tubular fiber body 5 is also expanded to expand the existing pipe line 1. Press contact with the inner surface.

  Then, by pressing the mortar 10 into the space between the tubular fiber body 5 and the tubular body 6, the tubular fiber body 5 is expanded and pressed against the inner surface of the pipe 1, and the mortar 10 is cured in this state. By caulking, the lining of the pipe line 1 by the composite pipe 3 can be formed.

  When the composite pipe 3 is installed on the ground, the cylindrical fiber body 5 is installed on the ground surface 4 as it is, and the cylindrical body 6 is inserted into the cylindrical fiber body 5 so that the inside of the cylindrical body 6 The heated and pressurized fluid is fed into the tube and inflated to cause the cylindrical fiber body 5 to follow the unevenness of the ground surface.

  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 into a circular cross section, and in this state, the mortar 10 is hardened to obtain the ground surface 4. The composite pipe 3 can be laid on the 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 fiber 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 cylindrical wire mesh 16 as a spacer is interposed between the tubular fiber body 5 and the tubular body 6, and the tubular fiber mesh 16 connects the tubular fiber body 5 and the tubular body 6. The interval is kept constant over the entire circumference.

  FIG. 7 shows a method for manufacturing the composite pipe 3 of FIG. FIG. 7A shows a state in which the tubular wire mesh 16 is inserted into the tubular fiber body 5, and the tubular wire mesh 16 is preferably rough and has unevenness in the thickness direction to some extent.

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

  Then, as shown in FIG. 7 (c), the heated pressurized fluid is fed from the fluid feeding pipe 12 to inflate the cylindrical body 6 into a circular cross section, and the outer surface abuts against the inner surface of the cylindrical wire mesh 16. Further, the tubular wire mesh 16 is further expanded and brought into contact with the inner surface of the tubular fibrous body 5. Thereby, the space | interval 13 of the cylindrical fiber body 5 and the cylindrical body 6 is hold | maintained with the fixed magnitude | size over the perimeter full length by the cylindrical wire mesh 16. FIG.

  Next, as shown in FIG. 7 (d), the end frame 14 is formed between both ends of the tubular fiber body 5 and the tubular body 6, and the interval 13 between the tubular fiber body 5 and the tubular body 6 is formed. The mortar 10 is filled in and hardened.

DESCRIPTION OF SYMBOLS 1 Pipe line 3 Composite pipe 4 Ground surface 5 Tubular fiber body 6 Tubular body 7 Tubular body 8 Fabric layer 9 Chip 10 Mortar 13 Spacing 14 Wife form 16 Tubular metal mesh

Claims (14)

The tubular fibrous body (5), which is formed by integrally forming a fabric layer (8) formed by weaving fibers on the outside of a tubular body (7) made of hard thermoplastic plastic inside the tubular fibrous body (5). 5) A composite comprising a tubular body (6) having a smaller diameter and a mortar (10) filled between the tubular fiber body (5) and the tubular body (6). tube 2. The composite pipe according to claim 1, wherein a spacer is interposed between the cylindrical fiber body (5) and the cylindrical body (6). The said spacer is a chip | tip (9) inserted between the said cylindrical fiber body (5) and a cylindrical body (6), and adhere | attached on either one, The said feature is characterized by the above-mentioned. Composite tube as described in The composite pipe according to claim 2, characterized in that the spacer is a cylindrical wire mesh (16) interposed between the cylindrical fiber body (5) and the cylindrical body (6). The composite pipe according to claim 1, characterized in that the yarn constituting the tubular fibrous body (5) and the fabric layer (8) is 10000 dtex or more. The composite pipe according to claim 1 or 5, wherein the tubular fibrous body (5) and the fabric layer (8) are made of fibers having fluff. The composite pipe according to claim 1, wherein the composite pipe is installed in an existing pipe line (1). The composite pipe according to claim 1, wherein the composite pipe is installed on the ground surface (4). In the tubular fibrous body (5), the tubular fibrous body (5) is formed by integrally forming a woven fabric layer (8) formed by weaving fibers on the outside of the tubular body (7) made of hard thermoplastic. And a step of inserting a cylindrical body (6) having a smaller diameter than the above), a heated pressurized fluid is fed into the cylindrical body (6), and the hard thermoplastic is softened and expanded into a circular cross section. Expanding the cylindrical fiber body (5) into a circular cross-section, cooling the cylindrical body (6) to stiffen the hard thermoplastic, and the cylindrical fiber body (5) A wife mold (14) is formed between both ends of the tubular body (6), and the mortar (10) is placed in the space (13) between the tubular fiber body (5) and the tubular body (6). A method of manufacturing a composite pipe, characterized by comprising a step of filling and curing The chip (9) is bonded to the outer surface of the cylindrical body (6), and the cylindrical body (6) is inserted into the cylindrical fiber body (5) to be inflated into a circular section with a heated and pressurized fluid. The chip (9) is brought into contact with the inner surface of the cylindrical fiber body (5) to expand into a circular cross section, and the gap (between the cylindrical fiber body (5) and the cylindrical body (6) ( 13. The method of manufacturing a composite pipe according to claim 9, wherein 13) is formed. A tubular wire mesh (16) is inserted into the tubular fiber body (5), and the tubular body (6) is further inserted into the tubular wire mesh (16) to feed a heated and pressurized fluid. The cylindrical body (6) is inflated into a circular cross section, the outer surface of the cylindrical body (6) is brought into contact with the inner surface of the cylindrical wire mesh (16), and the cylinder is interposed between the cylindrical fiber body (5) and the cylindrical body (6). 10. The method of manufacturing a composite pipe according to claim 9, wherein the interval (13) is formed by a wire mesh (16). A cylindrical fibrous body (5) inserted through the cylindrical body (6) is inserted into the existing pipe (1), and the cylindrical body (6) is inflated into a circular cross section to be rigidized. The method for producing a composite pipe according to claim 9, characterized in that a mortar (10) is filled in an interval (13) between the tubular fibrous body (5) and the tubular body (6). The tubular fiber body (5) is inserted into the existing pipe line (1), the tubular body (6) is inserted into the tubular fiber body (5), and the tubular body (6) is cross-sectioned. 10. Composite according to claim 9, characterized in that it is inflated into a circle and stiffened, and the mortar (10) is filled in the space (13) between the tubular fibrous body (5) and the tubular body (6). Tube manufacturing method The tubular fiber body (5) is installed on the ground surface (4), the tubular body (6) is inserted into the tubular fiber body (5), and the tubular body (6) is circular in cross section. Inflating and aligning the cylindrical fiber body (5) with the unevenness of the ground surface, and filling the interval (13) between the cylindrical fiber body (5) and the cylindrical body (6) with the mortar (10). The method of manufacturing a composite pipe according to claim 9, wherein

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