JP2016098924A - Pipe passage and its lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe passage having a cylindrical body with a fibrous layer integrally formed on hard thermoplastic at its inner surface, the cylindrical body being inserted into an existing pipe and mortar being filled to show a superior adhering characteristic between the cylindrical body and mortar and both members not being peeled off.SOLUTION: This invention relates to a cylinder body 2 having cylindrical fabric 4 woven by fibers into a cylindrical shape integrally formed therein inserted outside a pipe body 3 made of hard thermoplastic material is inserted into an existing pipe 5, and mortar 8 is filled in a clearance 7 between the existing pipe 5 and the cylinder body 2.EFFECT: This invention shows a quite high adhering power due to biting of mortar 8 into irregularities of the cylindrical fabric 4, and other facts that the fibrous cylindrical fabric 4 is exposed at an outside surface of the cylinder body 2, and mortar 8 already been set while being contacted with the cylindrical fabric 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe line and a lining method thereof, and more particularly to a structure of a pipe line in which a damaged portion is repaired when an existing pipe is damaged, and a pipe lining method as a repair method thereof. It is.

  In Japanese Patent Application Laid-Open No. 2012-127281 (Patent Document 1), a cylindrical repair material impregnated with a curable resin liquid is inserted into an existing pipe while reversing the inner and outer surfaces thereof, and the curable resin liquid is cured. A method of filling the mortar between the existing pipe and the repair material and curing the mortar is shown.

  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.

  In addition, a synthetic resin sheet and a bulky fiber fabric are bonded in advance to the entire inner surface of a concrete pipe on the microfilm (Patent Document 2) disclosed in Japanese Patent Application No. 61-162249 (Publication No. 63-68588). Concrete pipes are described, but these pipes are lined at the factory for short pipes such as fume pipes, and can be lined on site for existing pipes already installed. However, it is not possible to line the entire long pipe line constituted by a plurality of fume pipes over the plurality of pipes.

JP 2012-127281 A Application of published application No. 61-162249 (Japanese Utility Model Publication No. 63-68588)

  The present invention has been made in view of such circumstances, and has a cylindrical body in which a fiber layer is integrated with a hard thermoplastic plastic on an inner surface thereof, and the cylindrical body is inserted into an existing pipe. It is a pipe line in which mortar is filled between the existing pipe and the existing pipe, and the adhesive property between the cylindrical body and the mortar is good, and both are not peeled off.

Thus, the pipe line of the present invention has a tubular body formed by integrally forming a tubular fabric formed by weaving fibers into a tubular shape outside the tubular body made of hard thermoplastic inside the existing pipe. The mortar is filled in the space between the existing pipe and the cylindrical body.
In the present invention, it is preferable to interpose a spacer between the existing pipe and the cylindrical body. The spacer can be a chip bonded to the surface of the cylindrical body. Moreover, it is also possible to use a cylindrical wire mesh inserted between the existing pipe and the cylindrical body as another spacer.

  In the composite pipe according to the present invention, it is preferable to use a thread of 10,000 dtex or more as the yarn constituting the tubular woven fabric. It is also preferable that the tubular woven fabric is made of yarn having fluff.

  Next, in the pipe lining method of the present invention, a tubular body formed by integrally forming a tubular fabric formed by weaving fibers into a tubular shape outside a tubular body made of hard thermoplastic plastic in an existing pipe. Inserting a heated and pressurized fluid into the cylindrical body to soften the hard thermoplastic to inflate into a circular cross section, cool the cylindrical body to stiffen the hard thermoplastic, A wife mold is formed between both ends of the existing pipe and the cylindrical body, and the space between the existing pipe and the cylindrical body is filled with mortar and cured.

  In the present invention, a chip is bonded to the outer surface of the cylindrical body, the cylindrical body is inserted into the existing pipe and inflated into a circular cross section with a heated and pressurized fluid, and the chip is applied to the inner surface of the existing pipe. It is preferable that the gap is formed between the existing pipe and the cylindrical body.

  Further, in the present invention, a cylindrical wire mesh is inserted into the existing pipe, and further, the cylindrical body is inserted into the cylindrical wire mesh, and a heated and pressurized fluid is fed into the cylindrical body so as to have a circular cross section. Inflate, bring the outer surface of the cylindrical body into contact with the inner surface of the cylindrical wire mesh, stiffen the hard thermoplastic, and form the gap between the existing pipe and the tubular body by the cylindrical wire mesh It is also possible to do.

  According to the pipe line of the present invention, the tubular woven fabric of fibers is exposed on the outer surface of the tubular body, and the mortar is filled and cured while touching the tubular woven fabric. Since the mortar bites into the unevenness, the adhesive strength is extremely high and it does not easily peel off. Moreover, since the inner surface of the existing pipe is made of a material that is well-familiar with mortar such as steel or concrete, this also increases the adhesive strength.

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

  According to the pipe lining method of the present invention, the tubular body is formed by integrally forming a tubular woven fabric on the outer surface of the hard thermoplastic plastic. The plastic is softened and can be laid along a free path in a long existing pipe.

Cross-sectional view of the conduit of the present invention Central longitudinal sectional view of the pipeline of the present invention Central longitudinal cross-sectional view of a state where a cylindrical wire mesh is used as a spacer in the pipeline of the present invention Central longitudinal sectional view showing the method of lining a pipeline according to the present invention Central longitudinal sectional view showing the method of lining the pipeline of the present invention using a cylindrical wire mesh as a spacer

  The present invention will be described below with reference to the drawings. FIGS. 1 and 2 are a transverse sectional view and a central longitudinal sectional view showing the pipe line 1 of the present invention, and FIG. 4 shows the steps of the method for forming the pipe line 1 by the lining of the present invention.

  1 and 2, reference numeral 2 denotes a tubular body, which is formed by integrally forming a tubular fabric 4 formed by weaving fibers into a tubular shape outside a tubular body 3 made of hard thermoplastic. Therefore, it is inserted into the existing pipe 5.

  The tubular woven fabric 4 in the tubular body 2 is preferably a fiber having high strength such as nylon or polyester, and it is particularly preferable to use a yarn of 10,000 dtex or more as the warp and weft. Further, as the yarn, it is preferable to use a yarn having fluff such as a spun yarn or a wound yarn. The tube 3 is made of a hard thermoplastic, and for example, a hard vinyl chloride resin is used.

  For example, the tubular body 2 is formed by coating the tubular body 3 on the outside of the tubular woven fabric 4 by extrusion molding, and heating and softening the tubular body 3 with a heated and pressurized fluid so that the inside becomes the outside. It is formed by inversion.

  Then, chips 6 as spacers are bonded to the outer surface of the cylindrical body 2 at predetermined intervals in the circumferential direction and the length direction, and the distance between the existing pipe 5 and the cylindrical body 2 is extended over the entire circumference. And keep it even. The material of the chip 6 is not particularly limited, and for example, a polystyrene foam can be used.

  The space 7 between the existing pipe 5 and the cylindrical body 2 is filled with mortar 8 and hardened, and the inner surface of the existing pipe 5 is made of a mortar 8 reinforced by the cylindrical body 2. Is formed.

  Thus, as described above, by using a thick yarn of 10,000 dtex or more as the warp and weft of the tubular woven fabric 4, the yarn penetrates into the plastic or mortar 8 of the tubular body 3, so that an extremely high adhesive force is obtained. can get.

  Next, based on FIG. 4, the manufacturing method of the pipe line 1 of this invention is demonstrated. FIG. 4A shows a state in which the cylindrical body 2 is inserted into the existing pipe 5, and the cylindrical body 2 is, as described above, on the outer surface of the tubular body 3 made of the hard thermoplastic plastic. The tubular fabric 4 is integrally formed, and chips 6 as spacers are bonded to the outer surface of the tubular fabric 4 at predetermined intervals in the circumferential direction and the length direction.

  Next, as shown in FIG. 4 (b), both ends of the cylindrical body 2 are sealed with a lid body 9, a fluid inlet tube 10 is attached to one side of the lid body 9, and a fluid is placed on the other lid body 9. A discharge pipe 10 'is attached. Then, the heated pressurized fluid is fed into the cylindrical body 2 from the fluid feeding pipe 10 and discharged from the fluid discharge pipe 10 ′, and the inside of the cylindrical body 2 is pressurized to expand to a circular cross section, and the chip. 6 and press-contact with the inner surface of the existing pipe 5. As a result, a uniform distance 7 is formed between the existing pipe 5 and the cylindrical body 2 over the entire length of the entire length by the tip 6.

  Next, the heated pressurized fluid from the fluid inlet tube 10 is switched to a cooled pressurized fluid such as cold air, the cylindrical body 2 is cooled, and the rigid thermoplastic resin constituting the tubular body 3 is cooled to make it rigid. Let me.

  Next, the lid body 9 is removed from both ends of the cylindrical body 2, and as shown in FIG. 4C, a wife mold 11 is formed between both ends of the existing pipe 5 and the cylindrical body 2, and one wife mold is formed. A mortar filling tube 12 is attached to the frame 11, and the mortar 8 is filled into the space 7 between the existing tube 5 and the cylindrical body 2 from the mortar filling tube 12 and cured.

  Next, another embodiment of the present invention will be described with reference to FIGS. In FIG. 3, the tubular body 2 is inserted into the existing pipe 5, and the tubular body 2 is composed of the tubular body 3 and the tubular fabric 4, and is exactly the same as the previous example.

  A cylindrical wire mesh 13 as a spacer is interposed between the existing pipe 5 and the cylindrical body 2, and the distance 7 between the existing pipe 5 and the cylindrical body 2 is extended over the entire circumference. The mortar 8 is filled in the interval 7.

  FIG. 5 shows a method of forming the pipe line 1 of FIG. 3 by lining the existing pipe 5. FIG. 5A shows a state in which the cylindrical wire mesh 13 is inserted into the existing pipe 5. It is preferable that the cylindrical wire mesh 13 is rough and has unevenness in the thickness direction to some extent.

  Next, as shown in FIG. 5B, the tubular body 2 is inserted into the tubular wire mesh 13. As in the previous example, the tubular body 2 is obtained by forming a tubular fabric 4 on the outer surface of a tubular body 3 made of hard thermoplastic plastic.

  Both ends of the cylindrical body 2 are sealed with lids 9, heated and pressurized fluid is supplied from a fluid inlet pipe 10 to expand to a circular cross section, and its outer surface is brought into contact with the inner surface of the cylindrical wire mesh 13. Then, the cylindrical body 2 is cooled by switching to the cooling fluid. Thereby, the space | interval 7 of the existing pipe 5 and the cylindrical body 2 is hold | maintained to the fixed magnitude | size over the perimeter full length by the cylindrical metal-mesh 13.

  Next, as shown in FIG. 5 (c), a wife mold 11 is formed between both ends of the existing pipe 5 and the cylindrical body 2, and mortar is filled in the space 7 between the existing pipe 5 and the cylindrical body 2. The mortar 8 is filled from the tube 12 and cured.

  In the pipe line of the present invention, the tubular fabric 4 of the fiber is exposed on the outer surface of the tubular body 2, and the mortar 8 is filled and cured in the state of touching the tubular fabric. Since the mortar 8 bites into the irregularities of the fiber 4, the adhesive force is extremely high, and it does not peel off easily. Further, since the inner surface of the existing pipe 5 is made of a material that is well-familiar with the mortar 8 such as steel or concrete, this also increases the adhesive strength.

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Tubular body 3 Tubing body 4 Tubular fabric 5 Existing pipe 6 Tip 7 Interval 8 Mortar 11 Wife form 13 Tubular metal mesh

Claims (9)

A tubular body (2) formed integrally with a tubular fabric (4) formed by weaving fibers into a tubular shape outside a tubular body (3) made of hard thermoplastic plastic inside an existing pipe (5). ), And the mortar (8) is filled in the space (7) between the existing pipe (5) and the cylindrical body (2). The pipe line according to claim 1, wherein a spacer is interposed between the existing pipe (5) and the cylindrical body (2). Pipe line according to claim 2, characterized in that the spacer is a chip (6) glued to the surface of the tubular body (2). Pipe line according to claim 2, characterized in that the spacer is a cylindrical wire mesh (13) inserted between the existing pipe (5) and the cylindrical body (2). Pipe line according to claim 1, characterized in that the yarn constituting the tubular woven fabric (4) is 10000 dtex or more. 6. Pipe line according to claim 1 or 5, characterized in that the tubular woven fabric (4) consists of yarn having fluff. A tubular body (2) formed integrally with a tubular fabric (4) formed by weaving fibers in a tubular shape outside a tubular body (3) made of hard thermoplastic plastic in an existing pipe (5). Is inserted into the cylindrical body (2), heated and pressurized fluid is fed into the cylindrical body (2) to soften the hard thermoplastic and expand into a circular cross section, and the cylindrical body (2) is cooled to cool the hard heat. Stiffening the plastic plastic, forming the end mold (11) between the both ends of the existing pipe (5) and the cylindrical body (2), between the existing pipe (5) and the cylindrical body (2) A method for lining a pipe, characterized in that the interval (7) is filled with mortar (8) and cured. The chip (6) is bonded to the outer surface of the cylindrical body (2), and the cylindrical body (2) is inserted into the existing pipe (5) to be inflated into a circular shape with a heated and pressurized fluid, and The tip (6) is brought into contact with the inner surface of the existing pipe (5) to form the gap (7) between the existing pipe (5) and the cylindrical body (2). Line lining method according to 7 A tubular wire mesh (13) is inserted into the existing pipe (5), and the tubular body (2) is further inserted into the tubular wire mesh (13) to heat the tubular body (2). The pressurized fluid is fed into a circular shape in cross-section, the outer surface of the cylindrical body (2) is brought into contact with the inner surface of the cylindrical wire mesh (13), the hard thermoplastic is rigidized, and the existing pipe The method of lining a pipe according to claim 7, wherein the interval (7) is formed by the cylindrical wire mesh (13) between the cylindrical body (2) and the cylindrical body (2).

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