JP2002323175A - Manufacturing method of plastic pipe and pipe-lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe-lining method rehabilitating and preventing corrosion of a pipe, by lining even for a large bore and long pipe with high workability, in a short time. SOLUTION: A plastic pipe 1, having the length shorter than the entire length of the pipe line 10 and an outside diameter smaller than the inside diameter of the pipe line 10, is formed inside the pipe line 10, the plastic pipe 1 is moved inside the pipe line 10 to connect multiple plastic pipes 1 together, and a grouting material is filled between the connected multiple plastic pipes 1 and the pipe line 10 and is hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete or metal pipeline constructed by a lining method or a propulsion method by lining the inner peripheral surface of an aged pipeline. Pipe lining method for preventing corrosion.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, or when a newly installed concrete or metal pipeline is subjected to anticorrosion treatment, the pipeline is excavated from the ground. Without this, a pipe lining method has been proposed in which the inner peripheral surface of a pipe is lined to rehabilitate or prevent corrosion of the pipe, and this method has already been put into practical use.

[0003] In the pipe lining method, for example, a pipe lining material obtained by impregnating an uncured liquid curable resin into a tubular resin adsorbent such as a non-woven fabric is reversely inserted into a pipe by fluid pressure, and then the pipe lining material is formed. Is expanded by fluid pressure, while pressing this 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 hardened pipe lining material and rehabilitating or preventing corrosion of the pipe.

[0004]

However, for example, when rehabilitation or anticorrosion treatment is performed on a large-diameter long sewer pipe or agricultural water pipe having a diameter of at least φ1000 mm and a length exceeding 100 m by the conventional pipe lining method. It takes a long time to insert a large-diameter, long and heavy pipe lining material in a pipe, and to cure the curable resin impregnated in the pipe lining, especially in the pipes currently in service. However, it was difficult to temporarily stop the service and apply the lining little by little to the pipeline.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a lining in a short time with good workability even for a large-diameter and large-diameter pipe, thereby rehabilitating or preventing corrosion. It is to provide a pipe lining method that can be processed.

[0006]

Means for Solving the Problems To achieve the above object, the invention according to claim 1 is directed to a tubular resin adsorbent impregnated with a curable resin in a state where the adsorbent is expanded into a tube by fluid pressure. By curing the curable resin impregnated in the adsorbent, a plastic pipe having a length shorter than the entire length of the conduit and having an outer diameter smaller than the inner diameter of the conduit is manufactured.

According to a second aspect of the present invention, in the first aspect of the present invention, the tubular resin adsorbent is introduced into an inlet portion of a pipeline, and an inliner is inverted and inserted into the inside of the tubular resin adsorbent by fluid pressure. A fluid pressure is applied to the inside of the inliner to spread the tubular resin adsorbent into a tubular shape.

According to a third aspect of the present invention, a plastic pipe having a length shorter than the entire length of the pipeline and having an outer diameter smaller than the inner diameter of the pipeline is formed in the pipeline, and the plastic pipe is moved in the pipeline. After the plurality of plastic pipes are connected to each other, a grout material is injected between the connected plurality of plastic pipes and the pipeline to cure the grout material.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the outer diameter of the plastic pipe is set to be at least 20 mm smaller than the inner diameter of the pipeline.

The invention according to claim 5 is the invention according to claim 3 or 4, wherein a flexible tubular plastic film,
An outer peripheral surface of the plastic pipe is covered with a tubular coupling member formed by welding, bonding or needle punching an adsorbent to the inner and outer peripheral surfaces of a tubular woven fabric or a tubular nonwoven fabric.

According to a sixth aspect of the present invention, in the third, fourth or fifth aspect, a hole is formed in the plastic pipe from the inside of the plastic pipe, and a spacer is provided between the pipe and the plastic pipe through the hole. And fixing the plastic pipe to the pipe, and then injecting the grout material between the pipe and the plastic pipe through the hole.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, a coupling is attached to the hole, an injection hose is connected to the coupling, and the grout material is supplied from the injection hose and supplied. It is characterized by being injected between a pipe and a plastic pipe.

According to the first or second aspect of the present invention, a large-diameter plastic pipe is obtained by expanding a tubular resin adsorbent in a pipe and curing a curable resin impregnated therein. Can also be easily formed in the pipeline.

According to the third aspect of the present invention, a plastic pipe having a smaller diameter than the pipe is formed in the pipe, and the plastic pipe is moved in the pipe to connect the plurality of plastic pipes to each other. By repeating the operation, one continuous plastic pipe is arranged in the pipeline, grout material is injected between the plastic pipe and the pipeline, and this is hardened, whereby the lining of the pipeline is constructed. Therefore, even a large-diameter and long pipe line can be lined in a short time with good workability, and can be rehabilitated or subjected to anticorrosion treatment.

According to the fourth aspect of the present invention, since the outer diameter of the plastic pipe is set to be smaller than the inner diameter of the pipe by at least 20 mm, one continuous plastic pipe provided in the pipe and the inner wall of the pipe are connected to each other. In between, a gap into which the grout material is to be injected can be reliably formed.

According to the fifth aspect of the present invention, since the plastic pipe and the pipe are firmly connected by the tubular connecting member interposed between the plastic pipe and the pipe, the pressure resistance of the plastic pipe is increased.

According to the sixth and seventh aspects of the present invention, the grout material can be injected from the hole formed in the plastic pipe into the space between the conduit and the plastic pipe and can be uniformly filled in the length direction. .

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 are sectional views showing a pipe lining method according to the present invention in the order of steps, FIG. 5 is an enlarged sectional view taken along line AA of FIG. 4, and FIG. 6 is a partial perspective view of a tubular coupling member. 7 is an enlarged detailed view of a portion B in FIG.

In FIG. 1, reference numeral 10 denotes an aging pipeline buried underground, and a plurality of manholes 11 opening to the ground are connected to the pipeline 10.

As shown in FIG. 1, when lining the pipeline 10, a plastic pipe having a length shorter than the entire length of the pipeline 10 and having an outer diameter smaller than the inner diameter of the pipeline 10 by 20 mm or more is used. 1 is formed in the conduit 10.

Here, the plastic pipe 1 is connected to the pipe 10
Is formed as follows.

That is, the length is shorter than the entire length of the conduit 10,
The tubular resin adsorbent 2 having an outer diameter smaller than the inner diameter of the pipe 10 by 20 mm or more is introduced into the inlet of the pipe 10, and the inliner 12 inserted upside down into the tubular resin adsorbent 2 is inverted.
Is sealed with a fixing nozzle 13. Then, the compressor 14 installed on the ground is driven to supply compressed air from the air hose 15 to the inside of the inliner 12 to expand the inliner 12, thereby expanding the tubular resin adsorbent 2 into a tubular shape as shown in the figure.

Here, the tubular resin adsorbent 2 is made of a tubular nonwoven fabric of polyester, vinylon, acrylic or the like impregnated with an uncured thermosetting resin. As the thermosetting resin impregnated in the tubular resin adsorbent 2, an unsaturated polyester resin, a vinyl ester resin, an epoxy resin, or the like is used.

In the present embodiment, the outer peripheral surface of the tubular resin adsorbent 2 is covered with a tubular connecting member 3, and the tubular connecting member 3 is made of a flexible tubular plastic as shown in FIGS. Adsorbents 5 and 6 are welded to the inner and outer peripheral surfaces of the film 4.

Here, the tubular plastic film 4 is
It is formed of polyethylene, polypropylene or polyurethane having a thickness of 0.1 mm to 2 mm, and is formed into a tubular shape by rolling a sheet-like plastic film, butting its ends together, and joining the butted parts by sewing. If necessary, the joint of the tubular plastic film 4 is hermetically sealed by welding a plastic film 7 in the form of a ribbon tape.

The adsorbents 5 and 6 are capable of adsorbing grout, and have a basis weight of 50 g / m ² to 1 g / m ^2.
It is composed of a nonwoven fabric made of 500 g / m ² polyester, vinylon, acrylic or polypropylene fibers.

Incidentally, the tubular coupling member 3 may be constituted by adhering adsorbents 5 and 6 to the inner and outer surfaces of the tubular plastic film 4, and in this case, the adhesive is an ionomer, an admer or a polyamide. Is used.
Further, the tubular coupling member may be constituted by needle-punching an adsorbent to the inner and outer surfaces of a tubular woven fabric or a tubular nonwoven fabric made of polyester fiber, polypropylene fiber, nylon fiber, tape-like polypropylene or a composite thereof. .

As shown in FIG. 1, the hot water hose 16 drawn into the inliner 12 with the tubular resin adsorbent 2 and the tubular connecting member 3 covering the outer peripheral surface of the tubular resin adsorbent 2 being expanded into a tubular shape. The hot water is showered from.

That is, a hot water tank 17 is provided on the ground, and the hot water hose 16 extends from a lower portion of the hot water tank 17. The hot water hose 16 passes through the fixing nozzle 13 and passes through the inliner 12. A hot water pump 18 is provided in a portion near the hot water tank 17.

One end of a drain hose 19 is drawn into the inside of the inliner 12.
Is open above the hot water tank 17.

Further, a hot water pipe 20 extends from a lower portion of the hot water tank 17, and a hot water pump 21 and a boiler 22 are provided in the middle of the hot water pipe 20. The hot water pipe 20 is open above the hot water tank 17.

When the hot water pump 18 is driven,
The hot water in the hot water tank 17 is introduced into the inside of the inliner 12 through the hot water hose 16, and is jetted from a plurality of injection ports (not shown) formed in the hot water hose 16 so that the tubular resin adsorbing material 2 is discharged.
Heat. Then, the hot water supplied to the heating of the tubular resin adsorbent 2 and collected at the bottom of the inliner 12 passes through the drainage hose 19 due to the pressure in the inliner 12, and flows into the hot water tank 1.
It is returned to 7.

In the hot water tank 17, hot water is driven by a hot water pump 21 so that hot water passes through the hot water pipe 20 and
The hot water guided to 2 and heated to a predetermined temperature by the boiler 22 is returned to the hot water tank 17. Therefore, the hot water tank 17 always contains hot water of a predetermined temperature.

Then, the hot water in the hot water tank 17 is supplied to the inside of the inliner 12 through the hot water hose 16, is supplied to the heating of the tubular resin adsorbent 2, and then passes through the drain hose 19 to the hot water tank 17. Thereafter, the same operation is repeated to circulate between the inliner 12 and the hot water tank 17 to heat the tubular resin adsorbent 2.

When the tubular resin adsorbent 2 is heated by warm water as described above, the thermosetting resin impregnated in the tubular resin adsorbent 2 is cured, and as a result, the plastic pipe 1 It is formed in the road 10.

When the plastic pipe 1 is formed in the pipeline 10 as described above, the rope 24 is pulled by operating the winch 23 installed on the ground as shown in FIG. The plurality of plastic pipes 1 are sequentially connected by moving the plastic pipes 1 in the pipeline 10. At the same time as this operation, the operation of forming the plastic pipe 1 in the pipeline 10 is performed in parallel.

By repeating the above operation, FIG.
As shown in FIG. 1, a plurality of plastic pipes 1 are connected to each other to form one continuous plastic pipe 1A.
When it is formed in the space 0, the grout material 8 is filled in the gap formed between the plastic pipe 1A and the inner wall of the conduit 10.

That is, a container 25 containing the grout material 8 and a grout pump 26 are installed on the ground. The grout pump 26 is driven while the grout material 8 in the container 25 is stirred by the stirrer 27, and the grout pump 26 in the container 25 is driven. The grout material 8 is injected from the grout hose 28 into the gap between the plastic pipe 1A and the inner wall of the pipe 10 to be filled.

Here, as the grout material 8, a non-shrinkable cement milk or resin mortar having a high fluidity is used. The outer diameter of each plastic pipe 1 is larger than the inner diameter of the pipe 10 as described above. Is also set to be smaller than 20 mm, so that one continuous plastic pipe 1A formed by connecting a plurality of plastic pipes 1 and the inner wall of the conduit 10 are surely formed with a gap into which the grout material 8 is to be injected. This gap is filled with the grout material 8. In addition, the injection pressure of the grout material 8 is controlled to 0.01 MPa to 0.15 MPa.

When the grout material 8 is injected into the gap between the plastic pipe 1A and the pipe 10, the plastic pipe 1A rises due to buoyancy. To prevent this, both ends of the plastic pipe 1A are sealed and water is injected inside. Storing or injecting the grout material 8 is performed several times. Also, in order to prevent the grout material 8 from flowing out of the conduit 10, gaps and the like at the short portions of the conduit 10 are sealed in advance.

Thus, the plastic pipe 1A and the pipe 1
When the grout material 8 filled in the gap between the inner wall of the plastic pipe 1A and the inner wall of the pipe 10 is hardened by the grout material 8 and the tubular coupling member 3, as shown in FIGS. The deteriorated pipeline 10 is rehabilitated by lining its inner wall with a plastic pipe 1A.

As described above, according to the pipe lining method of the present invention, a plastic pipe 1 having a smaller diameter and shorter than the pipe 10 is formed in the pipe 10, and the plastic pipe 1 is formed in the pipe 10. By repeating the operation of moving and connecting the plurality of plastic pipes 1 to each other, one continuous plastic pipe 1A is provided in the pipeline 10, and the grout material 8 is placed between the plastic pipe 1A and the pipeline 10. Since the lining of the pipeline 10 is constructed by injecting and hardening the same, the lining can be regenerated in a short time with good workability even for the large-diameter and large-diameter pipeline 10.

According to the present invention, even if the plastic pipe 1 has a large diameter, the tubular resin adsorbent 2 is spread out in the pipe 10 and the thermosetting resin impregnated therein is cured. Can be easily formed in the pipeline 10.

Further, according to the present invention, the tubular coupling member 3 interposed between the plastic pipe 1 (1A) and the pipe 10
As a result, the plastic pipe 1 (1A) and the conduit 10 are firmly connected, and the pressure resistance of the plastic pipe 1 (1A) is increased.

Here, another embodiment of the method of injecting the grout material 8 will be described with reference to FIGS. FIG. 8 is a cross-sectional view showing a method of injecting the grout material 8, and FIG. 9 is a cross-sectional view taken along line CC of FIG.

When one continuous plastic pipe 1A is provided in the pipeline 10, a hole 30 is formed between the plastic pipe 1A and the tubular coupling member 3 from the inside of the plastic pipe 1A.
Is formed, and a spacer 31 is placed between the pipe 10 and the plastic pipe 1A and the tubular coupling member 3 (at the top in the pipe 10) through the hole 30 to connect the plastic pipe 1A and the tubular coupling member 3 to the pipe 10 Fixed to. Then, a coupling 32 is inserted into the hole 30 from the inside of the plastic pipe 1A and attached thereto, and an injection hose 33 is connected to the coupling 32. Note that a valve 34 is provided in the middle of the injection hose 33.

The grout material 8 is supplied from the injection hose 33 and supplied to the pipe 10 and the plastic pipe 1.
The pipe 10 is lined with the plastic pipe 1A by injecting and filling the space between the plastic pipe 1A and the tubular coupling member 3, and the grout material 8 is formed through the hole 30 formed in the plastic pipe 1A. Since the grout material 8 is injected into the gap between the pipe 1A and the pipeline 10, the grout material 8 can be uniformly filled over the length direction of the gap.

Although the method of rehabilitating an aging pipe has been described above, the present invention is similarly applicable to the corrosion prevention treatment of a newly installed concrete or metal pipe.

[0050]

As is apparent from the above description, according to the present invention, a plastic pipe having a length shorter than the entire length of the pipeline and having an outer diameter smaller than the inner diameter of the pipeline is formed in the pipeline. The plastic pipe is moved in the pipeline to connect the plurality of plastic pipes to each other, and then grout is injected between the connected plurality of plastic pipes and the pipeline to cure the grout material. The effect is obtained that the lining can be applied in a short time with good workability even for a pipe line having a large diameter and a rehabilitation or anticorrosion treatment can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a pipe lining method (a step of forming a plastic pipe) according to the present invention.

FIG. 2 is a cross-sectional view showing a pipe lining method (a step of moving a plastic pipe) according to the present invention.

FIG. 3 is a cross-sectional view showing a pipe lining method (grout material injection step) according to the present invention.

FIG. 4 is a cross-sectional view showing a pipe lining method (a grout material curing step) according to the present invention.

FIG. 5 is an enlarged sectional view taken along line AA of FIG. 4;

FIG. 6 is a partial perspective view of a tubular coupling member.

FIG. 7 is an enlarged detail view of a portion B in FIG. 6;

FIG. 8 is a cross-sectional view showing another embodiment of a grout material injection method.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plastic pipe 2 Tubular resin adsorbent 3 Tubular joining member 4 Tubular plastic film 5,6 Adsorbent 8 Grout material 10 Pipe line 14 Compressor 16 Hot water hose 17 Hot water tank 18,21 Hot water pump 22 Boiler 23 Winch 24 Rope 25 Container 26 Grout Pump 30 Hole 31 Spacer 32 Coupling 33 Injection Hose

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Pref.

Claims (7)

[Claims] 1. The method according to claim 1, wherein the hardening resin impregnated in the tubular resin adsorbent is cured while the tubular resin adsorbent impregnated with the curable resin is expanded in a tubular shape by fluid pressure. A plastic pipe having a shorter length and an outer diameter smaller than the inner diameter of the conduit. 2. Introducing the tubular resin adsorbent into an inlet of a pipeline, inserting an inliner inside the tubular resin adsorbent upside down by fluid pressure, and applying fluid pressure to the inside of the inliner. 2. The method for producing a plastic pipe according to claim 1, wherein the tubular resin adsorbent is expanded into a tubular shape. 3. A plastic pipe having a length shorter than the entire length of the pipeline and having an outer diameter smaller than the inner diameter of the pipeline is formed in the pipeline, and the plastic pipe is moved in the pipeline to form a plurality of plastic pipes. A pipe lining method characterized by injecting a grout material between a plurality of connected plastic pipes and a pipe line and hardening the grout material after connecting the pipes to each other. 4. The pipe lining method according to claim 3, wherein the outer diameter of the plastic pipe is set to be smaller than the inner diameter of the pipe by at least 20 mm. 5. An outer peripheral surface of the plastic pipe is covered with a tubular coupling member formed by welding, bonding or needle-punching an adsorbent onto the inner and outer peripheral surfaces of a flexible tubular plastic film, tubular woven fabric or tubular nonwoven fabric. The pipe lining method according to claim 3 or 4, wherein the pipe lining method is characterized in that: 6. A hole is formed in the plastic pipe from the inside of the plastic pipe, and a spacer is installed between the pipe and the plastic pipe through the hole to fix the plastic pipe to the pipe. 6. The sensible lining method according to claim 3, wherein the grout material is injected between the pipe and the plastic pipe. 7. A coupling is attached to the hole, an injection hose is connected to the coupling, and the grout material is supplied from the injection hose and injected between a pipe and a plastic pipe. The pipe lining method according to claim 6, wherein