JP2003021263A - Tubular body, manufacturing method therefor and pipe lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe lining method capable of performing regeneration or anti-corrosion treatment of a pipeline while in service by lining with a high workability in a short time, even where the pipeline is long with a large bore. SOLUTION: A pipe lining method comprises the steps of introducing a plurality of tubular bodies 1 sequentially into a pipeline 10, moving the bodies 1 within the pipeline 10 while connecting the bodies 1 with one another to form a continuous tubular body 1A in the pipeline 10, then injecting a grouting material 13 in a clearance S between the tubular body 1A and the pipeline 10 to be hardened. The pipe lining method uses tubular bodies 1 wherein the bodies 1 are comprised of a plastic pipe with a shorter length than the full length of the pipeline 10 and with a smaller outer diameter than the inner diameter of the pipeline 10, the outer peripheral surface of the pipe being coated with a tubular bonding member in which the bonding material is welded, adhered, or bonded by needle-punching to inner/outer peripheral surface of a flexible plastic film, a woven or nonwoven fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular body to be used for anticorrosion treatment of aged concrete pipeline or newly constructed concrete or metal pipeline, its manufacturing method and the tubular body. Concerning the pipe lining method to be constructed.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is deteriorated or a newly constructed concrete or metal pipeline is subjected to anticorrosion treatment, the pipeline is dug from the ground. A pipe lining construction method has been proposed, in which the inner peripheral surface of the pipe line is lined without being put out, and the pipe line is rehabilitated or subjected to anticorrosion treatment.

In the above pipe lining method, a pipe lining material formed by impregnating an uncured liquid curable resin into a tubular resin adsorbing material such as a non-woven fabric is reversely inserted into a pipe line by fluid pressure, and then this pipe lining material is inserted. While being expanded by fluid pressure and being pressed against the inner peripheral surface of the pipe line, by curing the curable resin impregnated in the pipe lining material,
This is a method of lining the inner peripheral surface of a pipe with a cured pipe lining material to rehabilitate or prevent corrosion of the pipe.

[0004]

However, for example, in the case where a large sewage pipe or agricultural water pipe having a large diameter of 1000 mm or more and a length of more than 100 m is rehabilitated or anticorrosion treated by the conventional pipe lining method. , It takes a long time to reverse-insert a long and heavy pipe lining material with a large diameter into the pipe, and to cure the curable resin impregnated in this, especially in the pipes currently in service. However, it was difficult to temporarily stop service and to gradually line the pipeline.

The present invention has been made in view of the above problems, and an object of the present invention is to perform lining in a short time with good workability while using the pipeline even for a pipeline having a large diameter and a long length. It is an object of the present invention to provide a tubular body which can be subjected to rehabilitation or anticorrosion treatment, a method for producing the same, and a tube lining method.

[0006]

To achieve the above object, the invention according to claim 1 provides an outer peripheral surface of a plastic pipe having a length shorter than the entire length of the pipe and an outer diameter smaller than the inner diameter of the pipe. A tubular body is formed by covering a flexible plastic film, a woven fabric or a non-woven fabric with a tubular connecting member formed by welding, adhering or needle punching a binder to the inner and outer peripheral surfaces thereof.

According to a second aspect of the present invention, in the first aspect of the present invention, the binding material that is welded, adhered or needle punched to the outer surface of the plastic film, woven fabric or non-woven fabric is formed of non-woven fabric or magic tape. It is characterized in that a binder that is welded, adhered or needle punched to the inner surface of a plastic film, a woven fabric or a non-woven fabric is composed of the non-woven fabric.

According to a third aspect of the invention, in the first aspect of the invention, the outer diameter of the plastic pipe is set to be 20 mm or more smaller than the inner diameter of the conduit.

According to a fourth aspect of the present invention, a tubular resin adsorbent material impregnated with a curable resin is inserted into a cylindrical mold together with a tubular connecting member that covers the outer peripheral surface thereof, and the tubular resin adsorbent material and the tubular resin adsorbent material are tubular. In the state where the connecting members are expanded by a fluid pressure into a tubular shape and pressed into the mold, the curable resin impregnated in the tubular resin adsorbent is cured to form a plastic pipe, and the plastic pipe and the tubular connection are formed. The member is taken out of the mold to produce a tubular body.

According to a fifth aspect of the invention, in the invention of the fourth aspect, the inner diameter of the mold is 20 m greater than the inner diameter of the pipe line.
It is characterized in that it is set smaller than m.

According to a sixth aspect of the present invention, a flexible plastic film is provided on the outer peripheral surface of a plastic pipe having a length shorter than the entire length of the conduit and an outer diameter smaller than the inner diameter of the conduit.
Welding a binding material on the inner and outer peripheral surfaces of a woven or non-woven fabric, as a pipe lining construction method using a tubular body constructed by covering with a tubular joining member formed by adhesion or needle punching joining, a plurality of the tubular bodies After the pipes are sequentially introduced into the pipeline, and these tubular bodies are connected to each other and moved in the pipeline to form one continuous tubular body in the pipeline, the tubular body and the pipeline are separated from each other. It is characterized in that a grout material is injected into and cured.

The invention according to claim 7 is characterized in that, in the invention according to claim 6, the outer diameter of the plastic pipe is set smaller than the inner diameter of the conduit by 20 mm or more.

Therefore, according to the invention of claim 6 which is constructed by using the tubular bodies according to claims 1 to 3, the tubular bodies which are shorter than the pipeline and have a small diameter are connected to each other in the pipeline. By repeating the work of moving in
After forming a continuous tubular body of books, the lining of the pipeline is constructed by injecting grout material between the tubular body and the pipeline and hardening it, so that the pipeline with a large diameter and long length Even with respect to the above, it is possible to perform lining with good workability in a short time while the pipe is being used and to rehabilitate it.
Further, since the tubular body and the duct are firmly coupled by the tubular coupling member interposed between the tubular body and the duct, the pressure resistance of the tubular body is enhanced.

According to the invention of claim 4, the tubular resin adsorbent is hardened in the mold to form a plastic pipe, and the hardened plastic pipe is molded together with the tubular connecting member covering the outer peripheral surface of the mold. Since the tubular body is manufactured by taking it out from the inside, even a large-diameter tubular body can be easily manufactured on the ground with good workability.

Further, according to the invention of claim 5 or 7, since the outer diameter of the plastic pipe of the tubular body is set to be 20 mm or more smaller than the inner diameter of the pipeline, a grout material is provided between the tubular body and the pipeline. The gap to be injected can be surely formed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a tubular body according to the present invention, and FIG. 2 is a partially enlarged sectional view of a tubular connecting member of the tubular body.

As shown in FIG. 1, the tubular body 1 according to the present invention is constructed by covering the outer peripheral surface of a plastic pipe 2 with a tubular connecting member 3. Here, the length of the plastic pipe 2 is shorter than the entire length of the pipeline, and the inner diameter is set to be smaller than the inner diameter of the pipeline by 20 mm or more.

Further, as shown in FIG. 2, the tubular connecting member 3 is formed by welding, adhering or needle punching connecting the connecting materials 5 and 6 to the inner and outer peripheral surfaces of the flexible tubular plastic film 4. Where the plastic film 4
A polyethylene, polypropylene, or polyurethane film having a thickness of 0.1 mm to 2 mm is used for this purpose. Instead of this plastic film 4, a woven or non-woven fabric made of polyester fiber, polypropylene fiber, nylon fiber or tape polypropylene is used. You may use it.

By the way, the binder 6 which is welded, adhered or needle punched to the outer surface of the plastic film 4 is made of non-woven fabric or velcro, and the binder which is welded, adhered or needle punched to the inner surface of the plastic film 4. 5 is composed of a nonwoven fabric, the basis weight as the non-woven polyester of ^{50g / m 2 ~1500g / m 2} , nylon, vinylon, acrylic or polypropylene fibers are used. In addition, as an adhesive for adhering the binders 5 and 6 to the plastic film 4, epoxy, ionomer, acrylic, polyamide,
Urethane adhesives are used.

Next, a method of manufacturing the tubular body 1 having the above structure will be described with reference to FIGS. 3 and 4 are cross-sectional views showing a method for manufacturing a tubular body according to the present invention.

In manufacturing the tubular body 1, first, as shown in FIG. 3, a tubular resin adsorbent 2'impregnated with a curable resin is formed into a cylindrical form together with a tubular connecting member 3 covering the outer peripheral surface thereof. 7, the tubular resin adsorbent 2 ′ and the tubular coupling member 3 are spread in a tubular shape by a fluid pressure of 0.01 MPa to 0.1 MPa, and these are pushed into the mold 7.
The inner diameter of the mold 7 is set smaller than the inner diameter of the conduit by 20 mm or more.

Here, the tubular resin adsorbent 2'is PV
C, polyethylene, GRP, polyester, vinylon,
Made by impregnating an uncured liquid curable resin into a non-woven fabric made of plastic fiber such as acrylic,
As the curable resin, for example, unsaturated polyester resin,
Thermosetting resins such as epoxy resin and vinyl ester resin are used.

Then, as shown in FIG. 3, in a state where the tubular resin adsorbent 2'and the tubular connecting member 3 are pressed into the mold 7,
The curable resin impregnated in the tubular resin adsorbent 2'is cured by an arbitrary method (normal temperature curing, heating from the outside of the mold 7 or the tubular resin adsorbent 2'or a combination thereof) to form a plastic pipe. Set to 2. When the tubular resin adsorbent 2'is thus hardened to form the plastic pipe 2, as shown in FIG. 4, if the plastic pipe 2 and the tubular connecting member 3 are taken out from the mold 7, the outer diameter of the pipe is reduced. A tubular body 1 smaller than the inner diameter of the passage by 20 mm or more is obtained.

As described above, according to the method of the present invention, the tubular resin adsorbent 2'is cured in the mold 7 to form the plastic pipe 2
And the tubular body 1 is manufactured by taking out the hardened plastic pipe 2 from the mold 7 together with the tubular connecting member 3 covering the outer peripheral surface thereof. Therefore, even if the tubular body 1 has a large diameter, Can be easily manufactured on the ground with good workability.

Next, the pipe lining method according to the present invention, which is carried out using the tubular body 1 manufactured as described above, will be described with reference to FIGS. 5, FIG. 7 and FIG. 8 are sectional views showing the pipe lining method according to the present invention in the order of steps, FIG. 6 is an enlarged sectional view of part A of FIG. 5, and FIG. 9 is B of FIG.
It is a -B line sectional view.

In FIG. 5, reference numeral 10 denotes an aged pipe line buried in the ground, and a plurality of manholes 11 opening to the ground are connected to the pipe line 10.

Thus, when lining the conduit 10, as shown in FIG. 5, a plurality of tubular bodies 1 are attached to the manhole 1.
1 is sequentially introduced into the pipe line 10, and while the adjacent tubular bodies 1 are connected to each other by the connecting member 8, they are pulled by the pulling rope 9 in the direction of the arrow in the drawing to move in the pipe line 10. Thus, as shown in FIG. 7, one continuous tubular body 1A is formed in the conduit 10. Incidentally, in this work, since the pipe lining material impregnated with the curable resin is not used unlike the conventional case, it is not necessary to temporarily stop the service water, while continuously supplying the service water into the pipe line 10. You can do the work.

Here, the details of the connecting structure of the tubular bodies 1 are shown in FIG. 6. The connecting member 8 for connecting the two tubular bodies 1 has a resin whose outer surface is covered with a highly airtight plastic film. The adsorbent is formed by impregnating an uncured room temperature curable resin, and both ends thereof are fastened and fixed to the outer peripheral surface of the tubular body 1 by fastening bands 12. Thus, if the connecting member 8 is configured by impregnating the resin adsorbent with the uncured room temperature curable resin, the tubular bodies 1 are made flexible because the room temperature curable resin is not yet cured at the time of connection. It is movable and the connected tubular bodies 1 can be smoothly moved in the duct 10. And
After the tubular body 1 moves to a predetermined position in the conduit 10, if the room temperature curable resin impregnated in the connecting member 8 cures at room temperature,
The tubular bodies 1 are reliably connected to each other, and their relative movement is prevented.

Then, as shown in FIG. 7, when one continuous tubular body 1A is formed in the conduit 10, it is formed between the tubular body 1A and the inner wall of the conduit 10. The gap S is filled with the grout material 13.

That is, a container 14 accommodating the grout material 13 and a grout pump 15 are installed on the ground, and the grout pump 15 is driven while the grout material 13 in the container 14 is stirred by the stirrer 16 to drive the grout pump 15 in the container 14 inside. The grout material 13 is injected from the grout hose 17 into the gap S between the tubular body 1A and the inner wall of the duct 10 to fill the gap S. In this case, since the outer diameter of the tubular body 1 (plastic pipe 2) is set to be 20 mm or more smaller than the inner diameter of the pipeline 10 as described above, the grout material is provided between the tubular body 1 (1A) and the pipeline 10. The gap S into which 13 should be injected is surely formed.

Here, as the grout material 13, cement milk or resin mortar having high fluidity and no shrinkage is used, and the injection pressure thereof is 0.01 MPa to 0.15 MP.
managed by a.

By the way, when the grout material 13 is injected into the gap S, the tubular body 1A floats up due to buoyancy. Therefore, in order to prevent this, both ends of the tubular body 1A are sealed to store water therein, or the grout material 13 is injected. Divide into several times.

When the grout material 13 filled in the gap S between the tubular body 1A and the inner wall of the conduit 10 is hardened,
As shown in FIGS. 8 and 9, the tubular body 1A and the inner wall of the conduit 10 are firmly coupled by the grout material 13 and the tubular coupling member 3, and the aged pipe 10 has its inner wall lined by the tubular body 1A. It is done and is rehabilitated.

As described above, according to the pipe lining method according to the present invention, by repeating the operation of moving the tubular bodies 1 shorter than the pipeline 10 and having a small diameter, in the pipeline 10 while connecting them to each other. After forming one continuous tubular body 1A in the pipeline 10, the grouting material 13 is injected between the tubular body 1A and the pipeline 10 and the grouting material 13 is cured to lining the pipeline 10. As a result, even for a large-diameter and long conduit 10, it is possible to rehabilitate it by applying lining in a short time with good workability while using the conduit 10.

Since the tubular body 1A and the pipeline 10 are firmly coupled by the tubular coupling member 3 interposed between the tubular body 1A and the pipeline 10, the pressure resistance of the tubular body 1A is increased.

Although the method of rehabilitating an aged pipe has been described above, the present invention can be similarly applied to the anticorrosion treatment of a newly constructed pipe made of concrete or metal.

[0038]

As is apparent from the above description, according to the present invention, by repeating the operation of moving tubular bodies having a diameter smaller than that of the pipeline and having a small diameter to each other in the pipeline, the pipeline is repeated. After forming one continuous tubular body inside,
Since the lining of the pipeline is constructed by injecting grout material between the tubular body and the pipeline and curing the grout material, the pipeline can be used even for a pipeline having a large diameter and a long length. On the other hand, it is possible to obtain an effect that the lining can be applied in a short time with good workability and can be rehabilitated or anticorrosion treated.

[Brief description of drawings]

FIG. 1 is a side sectional view of a tubular body according to the present invention.

FIG. 2 is a partially enlarged sectional view of a tubular body according to the present invention.

FIG. 3 is a cross-sectional view showing a method for manufacturing a tubular body according to the present invention.

FIG. 4 is a cross-sectional view showing a method for manufacturing a tubular body according to the present invention.

FIG. 5 is a cross-sectional view showing a pipe lining method (a tubular body introducing and connecting step) according to the present invention.

FIG. 6 is an enlarged cross-sectional view of a portion A of FIG.

FIG. 7 is a cross-sectional view showing a pipe lining method (grouting material injection step) according to the present invention.

FIG. 8 is a cross-sectional view showing a pipe lining method (grouting material curing step) according to the present invention.

9 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

1 tubular body 1A One continuous tubular body 2 plastic pipes 2'Tubular resin adsorbent 3 Tubular connecting members 4 plastic film 5,6 binder 7 Formwork 8 connecting members 9 tow rope 10 pipelines 13 grout 15 grout pump 17 Grout Horse S gap

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // B29L 9:00 B29L 9:00 23:00 23:00 (72) Inventor Yasuhiro Yokoshima Yuki-gun, Ibaraki Prefecture Ishishita Town Osamu 175-3 Yokoshimanai F-term Co., Ltd. (reference) 4F100 AK01A AK01B BA02 DA11A DA11B DG12B DG15B EC03 EC09 EC18 EJ21 GB07 JL02 JL11 4F211 AD12 AD16 AD19 AD20 AG03 AG08 AH43 SA13 SC03 SD15 SJ SD13 S23 SJJ13

Claims (7)

[Claims] 1. A binder is welded to the inner and outer peripheral surfaces of a flexible plastic film, a woven fabric or a non-woven fabric, the outer peripheral surface of a plastic pipe having a length shorter than the entire length of the conduit and an outer diameter smaller than the inner diameter of the conduit. A tubular body characterized by being covered with a tubular coupling member formed by adhesive bonding or needle punching coupling. 2. The non-woven fabric or Velcro (registered trademark) is used as a binder that is welded, adhered or needle punched to the outer surface of the plastic film, woven fabric or non-woven fabric, and the inner surface of the plastic film, woven fabric or non-woven fabric is formed. The tubular body according to claim 1, wherein the binding material that is welded, bonded, or needle punched is made of a non-woven fabric. 3. The tubular body according to claim 1, wherein the outer diameter of the plastic pipe is set to be 20 mm or more smaller than the inner diameter of the conduit. 4. A tubular resin adsorbent, which is impregnated with a curable resin, is inserted into a cylindrical mold together with a tubular joint member covering the outer peripheral surface thereof, and the tubular resin adsorbent and the tubular joint member are subjected to fluid pressure. In the state where they are spread out in a tubular shape and pressed into the mold, the curable resin impregnated in the tubular resin adsorbent is cured into a plastic pipe, and then the plastic pipe and the tubular connecting member are taken out from the mold. A method for producing a tubular body, comprising the step of obtaining a tubular body. 5. The inner diameter of the mold is 20 times larger than the inner diameter of the pipeline.
5. The method for manufacturing a tubular body according to claim 4, wherein the tubular body is set smaller than mm. 6. A bonding material is welded to the inner and outer peripheral surfaces of a flexible plastic film, a woven fabric or a non-woven fabric, the outer peripheral surface of a plastic pipe having a length shorter than the entire length of the conduit and an outer diameter smaller than the inner diameter of the conduit. A pipe lining method constructed by using a tubular body formed by covering with a tubular joining member formed by adhesive bonding or needle punching joining, wherein a plurality of the tubular bodies are sequentially introduced into a duct, While connecting these to each other, they are moved in the pipeline to form one continuous tubular body in the pipeline, and then a grout material is injected between the tubular body and the pipeline to cure the same. The pipe lining method characterized by that. 7. The pipe lining method according to claim 6, wherein the outer diameter of the plastic pipe is set smaller than the inner diameter of the pipe passage by 20 mm or more.