JP2014005930A - Water flow pipe repairing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water flow pipe repairing method with which a construction period can be shortened without stopping water flowing inside of a water flow pipe and without limiting a construction time zone, and cost can also be reduced.SOLUTION: The water flow pipe repairing method for repairing a water flow pipe in which a liquid flows, includes: a step 1 of depositing a patch member or disposing an adhesive material 1 on a repair target location of the water flow pipe; and a step 2 of mounting an enclosure cover which covers the water flow pipe on which the patch member has been deposited or the adhesive material 1 has been disposed, in a waterproof manner. According to the water flow pipe repairing method, after the water flow pipe is laid within a construction and at least until mounting the enclosure cover in the step 2 after the step 1, leakage of a liquid from the repair target location is stopped.

Description

  The present invention relates to a repair method for a flowing water pipe in which a liquid flows, a composite pipe obtainable by the repair method, and an enclosure cover for use in the composite pipe.

  Conventionally, when a metal water pipe piped in a building has a hole and the water inside leaks, or when the rust is increased and left as it is, water leakage will occur. In case of concern, measures were taken to replace the water pipes of the entire building with new ones or to line the inner walls of the water pipes.

In Patent Document 1,
A stop plate that comes into contact with the outer surface of the leakage portion of the buried pipe;
A band with a tightening mechanism that is fitted to the buried pipe by connecting a plurality of divided members and that tightens the stopper plate via a contact member;
A buried pipe repairing device is disclosed that includes a repair pipe that is joined by welding of a plurality of divided members and covers the buried pipe together with the members.

In Patent Document 2,
A tube or line comprising a sheet on which one side is coated with an adhesive or a pressure-sensitive adhesive and the other side is formed with a large number of block structures having functions of securing rigidity and a cushioning material over the entire surface. A repair / protection sheet is disclosed.

  Patent Document 3 discloses a method for lining the inner wall surface of a water pipe.

Japanese Utility Model Publication No. 61-054588 JP-A-11-311392 JP 2012-000976 A

Due to the prolonged recession, the rebuilding of buildings such as buildings in Japan has been stagnant, and many buildings can be seen though the building age is over 20 or 30 years.
On the other hand, as the building ages, the flowing water pipes in which liquid flows inside metal sewer pipes and sewage pipes piped in the buildings are aging.
In large buildings inhabited by human beings such as buildings and condominiums, the water pipes are stretched vertically and horizontally in the building, so the connection is complicated and the total length is large.
Such flowing water pipes are aging at the same time with the age of the building, and the pipe wall is susceptible to small holes due to small holes or vibrations (hereinafter referred to as potential leak points). However, when a certain period of time elapses, all of the liquids break down and the liquid inside may leak out in earnest.

  As mentioned above, pipes are aging in buildings that have passed the age of construction in Japan. There is a need for a repair method for repairing drainage pipes that have a large number of locations and potential leak points.

In the buried pipe repair device disclosed in Patent Document 1, a rupture (crack) occurs in a part of a steel pipe (sewer pipe) buried in the ground, and the sewage leaks on the ground surface. A full-scale leakage corresponding to an “accident” that is permeated and released into the premises is assumed.
Therefore, in Patent Document 1, a contact member (11) formed in a plate shape or a frame shape is applied on the leaking portion (2) generated in the steel pipe, and leaked by tightening with a band (12) with a tightening mechanism. Step A for preventing water leakage from the part, and then repairing the outer periphery of the steel pipe with a plurality of divided members so as to accommodate and cover the abutting member (11) and the band (12) with a tightening mechanism And a step B for completely and tightly covering the outer peripheral surface of the steel pipe having the leakage portion by arranging the pipes and welding and joining the adjacent side edges of each divided member and between the steel pipes. A repair method is disclosed.

  Here, in Step A, even if the repair / protection sheet disclosed in Patent Document 2 is used in place of the above-described abutting member and band with a tightening mechanism, full-scale leakage in Step A can be prevented. Cannot be expected to prevent water leakage from the leaking part.

On the other hand, when the water pipe repair method disclosed in Patent Document 1 is applied to a water pipe having a large number of potential leak locations, a contact member (11) is applied to the potential leak locations and a band (12 ) In the process of applying a large physical load to the water pipe that is tightened in (), an excessive load is applied to the old water pipe due to construction vibration, etc., leading to numerous small holes and full-scale leakage at potential leak points Breakage occurs, leakage occurs from an unexpected location, and it may be difficult to prevent water leakage from the leakage portion until Step B is completed.
The band (12) with a tightening mechanism is composed of a circumferential reinforcing plate (12c) and a divided member (12a), and each divided member (12a) is connected by a bolt / nut (13) and embedded in a ring shape. The ring (12) with a tightening mechanism that is fitted on the outer peripheral surface of the pipe (1) has no waterproof effect because the connection part is not sealed, and leaks against new leakage. Water leakage from the part cannot be prevented by the band with a tightening mechanism (12).

  As described above, it is difficult to deal with a flowing water pipe having a lot of potential leaking portions or a portion where the liquid has a little leakage due to aging by the conventional repair method.

When a water pipe such as a water pipe is replaced with a new one, the cost becomes very high, which is a big problem in terms of cost effectiveness.
When replacing water pipes such as water pipes with new ones, the entire building must be stopped during construction. For example, the time that can be constructed in an office building is limited to nights and holidays, so the construction period is limited. It will be quite long.
Furthermore, even at night and on holidays, there are cases where the office is used, which may cause inconvenience due to water stoppage. In addition, in condominiums and the like, the construction is unavoidable during the daytime, which causes inconvenience to the residents due to water stoppage.
There are many problems due to the fact that the entire building must be stopped.

On the other hand, the method of lining the inside of the water pipe such as a water pipe has an advantage that the cost can be kept lower than when the water pipe such as the water pipe is replaced.
However, even with this lining method, it is necessary to stop the entire building during construction, so there are problems with water stop as in the case of replacing water pipes such as water pipes.

  The present invention stops the liquid such as water passing through the water pipe during construction with respect to the water pipe having a small liquid leak and / or a potential leak point that is piped in the building. It is an object of the present invention to provide a repair method for a running water pipe that does not require water, can shorten the construction period without limiting the construction time zone, and can also reduce the cost.

The present invention
(1) A water pipe repair method for repairing a water pipe in which a liquid flows.
A step 1 of attaching a patch member or arranging an adhesive 1 on a repair target portion of the water pipe;
And a step 2 of attaching an enveloping cover that covers the water pipe on which the patch member is adhered or the adhesive material 1 is disposed so as to be waterproof.
The running water pipe is piped in the building,
At least after the step 1 until the enclosure cover is attached in the step 2, the water pipe repair method in which leakage of the liquid from the repair target portion is stopped,
(2) Can be obtained by repairing with the running water pipe repair method described in (1) above.
For arranging in the building and flowing water inside,
The water pipe, the patch member or the adhesive 1, and a composite pipe provided with the surrounding cover,
(3) The water pipe according to (1) above, in which the patch member according to (1) above is attached or the adhesive 1 is disposed,
Enclosed with the enclosure cover described in (1) above,
A composite pipe that is arranged in a building and allows water to flow inside, and (4) the flow pipe repair method described in (1) above, the composite pipe described in (2) above, or the composite described in (3) above The enclosure cover according to (1) above for use in a pipe.

  The present invention stops the liquid such as water passing through the water pipe during construction with respect to the water pipe having a small liquid leak and / or a potential leak point that is piped in the building. It is possible to provide a repair method for flowing water pipes that does not require water, can shorten the construction period without limiting the construction time zone, and can also keep costs low.

It is a perspective view which shows the water pipe currently constructed | assembled by the repair method of flowing water pipes, such as a metal pipe, concerning one embodiment of this invention. It is a flowchart which shows the repair construction method of flowing water pipes, such as a metal pipe, concerning one embodiment of this invention. It is a side view which shows the state which attached the surrounding cover to the water pipe. It is the sectional view on the AA line in FIG. It is a side view which shows the connection part of the surrounding cover of the repaired water pipe. It is the BB sectional view taken on the line in FIG. It is a perspective view which shows the water pipe currently constructed | assembled by the repair method of flowing water pipes, such as a metal pipe, using the surrounding cover of a different form. It is a longitudinal cross-sectional view which shows the state which cut | disconnected the surrounding cover in FIG. 7 along the longitudinal direction. FIG. 8 is a transverse cross-sectional view showing a state cut at the joint cover portion in FIG. 7. It is a perspective view which shows the state which opened the surrounding cover of the water pipe currently constructed with the repair method of flowing water pipes, such as a metal pipe, using the surrounding cover of a different form. It is a side view which shows the inner side of the surrounding cover in FIG. It is explanatory drawing which looked at the water pipe currently constructed with the repair method of flowing water pipes, such as a metal pipe, using the surrounding cover of a different form. It is an example of manufacture of the division | segmentation enclosure cover in this invention. The left is a divided envelope cover having a connecting portion at both ends, and the right is a divided envelope cover having a connecting portion at one end. On the inner wall surface side of the divided enclosure cover having the connecting portions at both ends, a concavo-convex pattern is formed by random groove lines on the inner wall surface. It is an enlarged view by the side of the inner wall surface of the division | segmentation enclosure cover which has a connection part in both ends. It is the inner wall surface side of the division | segmentation enclosure cover which has a connection part in one end. It is an enlarged view of the inner wall surface side of the divided enclosure cover having a connecting portion at one end, and a Chijimi pattern uneven pattern is formed on the inner wall surface. In an example of manufacturing a patch member, the inner wall surface side of the patch member. An uneven pattern of Chijimi pattern is formed on the inner wall surface.

[Reflow water pipe repair method of the present invention]
The running water pipe repair method of the present invention is
A water pipe repair method for repairing a water pipe in which liquid flows inside,
A step 1 of attaching a patch member or arranging an adhesive 1 on a repair target portion of the water pipe;
And a step 2 of attaching an enveloping cover that covers the water pipe on which the patch member is adhered or the adhesive material 1 is disposed so as to be waterproof.
The running water pipe is piped in the building,
It is a flowing water pipe repair method in which leakage of liquid from the repair target portion is stopped at least after the step 1 until the enclosure cover is attached in the step 2.

  Hereinafter, among the repair target portions of the present invention, the minute leakage of the liquid in the running water pipe is caused, and by performing step 1, that is, the patch member is adhered or the adhesive material on the repair target portion By disposing 1, the portion where the liquid leakage stops after the step 1 until the enclosure cover is attached in the step 2 is also referred to as a minute leakage portion.

(Running water pipe)
The repair target of the construction method of the present invention is a flowing water pipe through which liquid flows, and is combined with a metal pipe that has been used conventionally, a synthetic resin such as vinyl chloride, polybutene, and vinyl ester that has been used in recent years, and glass fiber. Made of fiber reinforced resin (FRP (Fiber Reinforced Plastics)), ceramics, etc. are preferable as repair targets, but from the viewpoint that the number of repair targets of this construction method is overwhelmingly large, it is more preferable to repair metal pipes .

Hereinafter, although the construction method of the present invention will be described by taking a metal pipe as an example, the description is applicable to flowing water pipes of other materials.
The liquid flowing inside the water pipe is not limited to water, but may be an acid, an alkali, a solvent, or the like.
However, in the case of a water pipe other than a metal pipe and a liquid other than water, the surrounding cover, patch member, and adhesives 1 to 3 described later are suitable for the material of the water pipe and have resistance to these liquids and are waterproof. It is preferable to select one that can ensure the property.

[Step 1]
The running water pipe repairing method of the present invention, in step 1,
Place the patch member or the adhesive 1 on the repair target location described above,
From after step 1 until the enclosure cover is attached in step 2,
Regardless of whether the repair target location is a potential leak location or a slight leak location, leakage of liquid from that portion is prevented.

(1) Patch member The patch member is a plate-like member that has an area that can cover the repair target portion and is difficult for liquid to penetrate.
The patch member is not limited to a shape, and may be formed in a quadrilateral shape, and may be a circle, a triangle, or another polygon.

It is preferable that the patch member has flexibility or elasticity so that the portion to be repaired can be covered along the outer wall surface of the metal tube.
In order to configure a patch member having flexibility or elasticity, the patch member is preferably a plate-like member made of glass, synthetic resin or metal.

When the patch member is made of glass or metal, the patch member may be in the form of a cloth made of glass cloth or metal fiber.
When the patch member is made of synthetic resin or metal, it may be a thin sheet having flexibility or elasticity, or from the viewpoint of imparting flexibility even when it is a hard sheet. It is preferable that a variable portion extending in a predetermined direction is formed. The variable portion may be a portion that is made thin by forming a groove, for example, and can be easily bent.

  In addition, when the adhesive material 2 or 3 to be described later is applied to the side on which the groove of the sheet-like patch member is formed, the adhesive material 2 or 3 spreads along the groove to every corner of the attachment surface of the sheet-like patch member, Moreover, a groove | channel provides the anchor effect with respect to the adhesive material 2 or 3, and contributes to the more stable sticking of a sheet-like patch member.

  Therefore, it is preferable to form the groove serving as the variable portion of the sheet-like patch member or the diffusion path of the adhesive on the sticking surface facing the outer wall of the metal tube.

  Furthermore, the material of the patch member is preferably translucent or transparent, and more preferably transparent, from the viewpoint that the patch member can be operated while visually recognizing the correction target portion of the metal tube and can be reliably stretched.

An example of the patch member in which the variable portion is formed will be described with reference to FIG.
The patch member (20) is formed with a variable portion (21) extending in a predetermined direction. In FIG. (1), a plurality of variable portions (21) extending linearly are formed to be parallel to each other.

  By having the variable part (21), when the patch member (20) is attached to the water pipe (10), the extending direction of the variable part (21) is made to coincide with the extending direction of the water pipe (10). The member (20) can be appropriately bent at the variable portion (21) so that the entire patch member (20) can be bent along the cylindrical surface of the outer peripheral wall (11) of the water pipe (10).

When the patch member is made of a synthetic resin, the synthetic resin may be polyethylene, modified polyethylene, polypropylene, modified polypropylene, polybutene, polyester, vinyl ester, polychlorinated from the viewpoints of strength, flexibility, elasticity and waterproofness. Engineer plastics or rubbers such as vinyl, ethylene vinyl acetate copolymer, epoxy resin, fluororesin, thermoplastic elastomer, silicone rubber, polyimide, etc. are preferred. When the liquid is water, polyester, vinyl ester or epoxy resin is preferred, and liquid Even if is a solvent, a vinyl ester excellent in solvent resistance is more preferable.
Further, the patch member is preferably FRP (Fiber Reinforced Plastics) made of synthetic resin and fiber from the viewpoint of strength, flexibility, elasticity and waterproofness.
In the case of FRP, the synthetic resin is polyester, epoxy resin, and vinyl ester, and the fiber is more preferably glass fiber.

  The thickness of the patch member is preferably thin, preferably 0.1 to 10 mm, from the viewpoint of preventing the size of the enveloping cover that covers and surrounds the metal tube waterproofing in Step 2 from an unnecessarily large size. 2-5 mm is more preferable, 0.3-3 mm is still more preferable, 0.4-2 mm is still more preferable, and 0.4-1 mm is still more preferable.

  By attaching the patch member directly to the repair target location, for example, when the adhesive surface of the patch material to the repair target location is derived from the material of the patch member and has adhesiveness or adhesion to the outer wall of the metal tube In some cases, after the step 1 until the enclosure cover is attached in the step 2, even if the repair target location is a potential leak location or a slight leak location, liquid leakage from that location may be prevented.

  In addition, when the patch member is directly attached to the repair target location, after the step 1 until the surrounding cover is attached in the step 2, the construction vibration is suppressed in a short time, and the inner wall of the surrounding cover contacts the patch member. Then, the repair of the metal pipe can be completed by attaching the surrounding cover so as to press the patch member.

(2) Adhesive 1
The adhesive material 1 has adhesiveness with a metal tube, waterproofness, and quick hardening, and after the step 1 in which the adhesive material 1 is arranged at the repair target location, the repair target location is between the installation of the surrounding cover in the step 2. What is necessary is just to be able to prevent the leakage of the liquid from the location even if it is a potential leak location or a micro leak location.
The adhesive material 1 can be arrange | positioned by apply | coating the adhesive material 1 on the repair object location of a metal pipe, for example.

Adhesive 1 is, for example, a solvent-based adhesive (adhesive that dissolves in a polymer organic solvent and solidifies by volatilization of the organic solvent, rubber-based or resin-based), thermoplastic resin / thermoplastic elastomer as a main component. Hot-melt adhesives, elastic adhesives such as silicones, modified silicones and silylated urethane adhesives, reactive adhesives such as thermosetting and photo-curing, acrylic, rubber-based and silicone-based Although at least one can be preferably selected from the group consisting of pressure-sensitive adhesives (adhesives) and various adhesives of sealing materials,
From the viewpoint of quick hardening and waterproofness, a reactive adhesive is more preferable, and an epoxy-based adhesive is more preferable.

  As the adhesive 1, the above-described suitable adhesive can be used. However, if it has a function of preventing liquid leakage after the process 1 until the enclosure cover is attached in the process 2, the anticorrosion material and the coating for the lining are used. A composition having a liquid form such as a material may be used as the adhesive 1.

If the liquid 1 can be prevented from leaking after the step 1 until the enclosure cover is attached in the step 2 by the arrangement of the adhesive 1, the step 1 is performed before the adhesive 1 is cured in the step 1. Although the outer wall of the metal tube (the repair target location) and the inner wall of the surrounding cover that are in contact with the arrangement part of the adhesive 1 may be bonded and cured via the adhesive 1,
From the viewpoint of stably preventing leakage of the liquid after the step 1 until the enclosure cover is attached in the step 2, the disposed adhesive 1 is preferably cured before the step 2.

(3) Adhesive 2
From the viewpoint of stably preventing leakage of liquid during the period from step 1 to attachment of the enclosure cover in step 2,
It is preferable to stick the patch member on the repair target portion via the adhesive 2.
The adhesive material 2 may be pasted together with the adhesive material 2 that has been applied and placed in advance on the sticking surface side of the patch member and the patch member is applied on the sticking surface,
Before the patch member is adhered, the adhesive member 2 may be disposed on the repair target portion in advance, and the patch member may be adhered thereon, but the latter is preferable.

Before adhering the patch member, if the adhesive 2 is placed in advance on the repair target location,
If the liquid member can be prevented from leaking after the step 1 until the enclosure cover is attached in the step 2 by attaching the patch member via the adhesive 2, the adhesive 2 is cured in the step 1. It is preferable to apply a patch member before the operation.

  As the adhesive 2, the adhesive exemplified as suitable for the adhesive 1 can be used, but it is preferably liquid from the viewpoint of applicability on the sticking surface, and the surrounding cover is attached in step 2 after step 1. In the meantime, a composition having a liquid form such as an anticorrosive material or a lining resin may be used as the adhesive 2 as long as it has a function of preventing liquid leakage.

(4) Adhesive 3
From the viewpoint of stably preventing leakage of liquid during the period from step 1 to attachment of the enclosure cover in step 2,
In step 2, it is preferable that the enveloping cover surrounds and covers the metal tube via the adhesive 3 on the patch member.

In step 2, to enclose the surrounding cover so as to surround the metal tube via the adhesive 3 on the patch member,
(4-1) The adhesive member 3 may be applied in advance on the surface opposite to the attachment surface of the patch member, for example, by applying a patch member that has been applied and arranged,
(4-2) The adhesive material 3 may be applied and disposed on the patch member that is stuck,
(4-3) After step 1, in step 2, the surrounding cover is covered and surrounded by the metal tube, and then the adhesive material 3 is injected, for example, from the gap between the metal tube and the surrounding cover onto the patch member. May be.
From the viewpoint of stably preventing leakage of liquid from after step 1 to attachment of the enclosure cover in step 2, the adhesive material 3 is applied and placed on the patch member that is stuck, for example. It is preferable.

The adhesive material 3 is disposed at least in a portion corresponding to the top of the patch member so that the surrounding cover can be covered and covered with the metal tube via the adhesive material 3 on the patch member.
From the point of view of stably preventing the leakage of the liquid even after the progress of the corrosion of the repair target portion of the metal pipe after Step 2,
It is preferable that it is also arranged in the gap portion between the metal tube and the surrounding cover other than the portion corresponding to the patch member,
It is more preferable that the metal tube and the surrounding cover are disposed substantially over the entire gap.

When placing the adhesive 3 on the patch member that is stuck,
If the leakage of the liquid can be prevented after the step 1 to the attachment of the enclosure cover in the step 2, it is preferable to attach the enclosure cover before the adhesive 3 is cured.

  As the adhesive 3, the adhesive exemplified as suitable for the adhesive 1 can be used, but it is preferably liquid from the viewpoint of applicability on the sticking surface, and the surrounding cover is attached in step 2 after step 1. Until then, as long as it has a function of preventing leakage of liquid, a composition having a liquid form such as an anticorrosive or a resin for lining may be used as the adhesive 3.

Affixing the patch member on the repair target portion via the adhesive 2;
In step 2, enclosing the surrounding cover by surrounding the metal tube with the adhesive 3 on the patch member,
It is preferable to do either
More preferably, the patch member is stuck on the repair target portion via the adhesive 2 at least,
More preferably, both are performed.

[Step 2]
(1) Enclosure cover In step 2, an envelopment cover is attached that covers the metal tube on which the patch member is attached or the adhesive 1 is disposed in a waterproof manner.

  Covering a metal tube in a waterproof manner means that after the enclosure cover is attached in step 2, the corrosion of the metal tube proceeds due to aging, and the leakage of the liquid from the metal tube causes sticking or adhesion of the patch member. Even when the material 1 cannot be stopped due to the arrangement of the material 1, the surrounding cover should be attached so that the liquid does not leak to the outside from the surrounding cover and can serve as a pipe through which the liquid passes as much as a healthy metal pipe. Say.

  From the viewpoint of covering and covering the metal tube in a waterproof manner, the surrounding cover is preferably made of a material that is difficult for liquid to permeate and corroded, more preferably made of synthetic resin, metal or ceramics, and is handled lightly. From the viewpoint of ease, it is more preferable that it is made of a synthetic resin.

  Synthetic resins include polyethylene, modified polyethylene, polypropylene, modified polypropylene, polybutene, polyester, vinyl ester, polyvinyl chloride, ethylene vinyl acetate copolymer, epoxy resin, from the viewpoint of strength, flexibility, elasticity and waterproofness. Engineer plastics such as fluororesin, thermoplastic elastomer, silicone rubber and polyimide are preferred. When the liquid is water, polyester, vinyl ester or epoxy resin is preferred. Even if the liquid is a solvent, vinyl ester having excellent solvent resistance is more preferred. .

  From the same viewpoint, the surrounding cover is preferably FRP composed of synthetic resin and fiber. In FRP, the synthetic resin is preferably polyester, vinyl ester or epoxy resin when the liquid is water, and the liquid is a solvent. Even if it exists, the vinyl ester excellent in solvent resistance is more preferable, and it is still more preferable that a fiber is glass fiber.

  The envelope cover is attached so that the inner wall of the envelope cover is in contact with the patch member, the adhesive material 1 or the adhesive material 3 from the viewpoint of continuously preventing leakage of the liquid from the repair target site after the step 2. It is preferable that the contact is strong enough to press the patch member, the adhesive 1 or the adhesive 3.

From the viewpoint of continuously preventing leakage of liquid from the repair target location, the surrounding cover may have an uneven region on the inner wall of the surrounding cover where the patch member, the adhesive material 1 or the adhesive material 3 contacts. Preferably
The inner wall of the enveloping cover is in contact with the pasting area in the case of a patch member, and in the case of the adhesive material 1 or the adhesive material 3, all of the arranged area.
The contact area of the inner wall of the enveloping cover with the patch member, the adhesive 1 or the adhesive 3;
More preferably, 50% or more has an uneven region,
More preferably, 60% or more has an uneven region,
More preferably, 70% or more has an uneven region,
More preferably, 80% or more has an uneven region,
More preferably, 90% or more has an uneven region,
More preferably, 100% has an uneven area.

From the viewpoint of continuously preventing leakage of liquid from the repair target site, the surrounding cover and / or the patch member,
The maximum difference between the bottom of the concave portion and the top of the convex portion of the concave / convex region of the inner wall of the surrounding cover and / or the surface facing the metal tube of the patch member (hereinafter also referred to as the inner wall of the patch member) at the time of sticking,
0.1-10 mm is preferable, 0.2-5 mm is more preferable, 0.3-3 mm is still more preferable, 0.4-1.5 mm is still more preferable.

The unevenness of the uneven region of the inner wall of the surrounding cover and / or patch member is
Molding (molding), mold pressing (embossing), printing (printing), casting (casting), sintering (sintering), photo-imaging, chemical etching, etc.,
From the viewpoint of productivity, it is preferable to obtain a surrounding cover and / or a patch member by molding using a mold having a concavo-convex pattern in a desired position and area of the inner wall.

  The surrounding cover is made of the patch member affixed more than the radius of the outer circumference of the metal tube so that the inner wall of the surrounding cover comes into contact with the patch member, the adhesive 1 or the adhesive 3 when the enclosure cover is attached. It is preferable to have an inner wall circumference having a radius that is as large as the thickness, the thickness of the disposed adhesive 1, or the combined thickness of the patch member and the adhesive 2 and / or 3.

(2) Example of production of enclosure cover and patch member (enclosure cover)
An example of manufacturing a divided one (hereinafter referred to as a divided surrounding cover) in the case where the surrounding cover is divided into two parts having a joint extending along the extending direction will be described.
A release agent is applied to a semi-cylindrical female mold (the diameter of the outer circumference of the cross section is 105 mm) on which the Chijimi pattern corresponding to the uneven pattern on the inner wall of the divided enclosure cover is formed, and a liquid vinyl ester is applied on the female mold. Then, a liquid mixture containing methyl ethyl ketone peroxide-based curing agent, dimethylaniline-based curing accelerator and black pigment is applied, an inorganic glass fiber mat is stacked thereon, and the liquid mixture is further applied to form an FRP resin layer. . The coating amount of the liquid mixture and the basis weight of the glass fiber sheet are adjusted and selected so that the FRP molded body obtained by curing the FRP resin layer has a desired thickness.
After the FRP resin layer was solidified to form an FRP molded body, the FRP molded body was peeled off from the female mold, and the FRP molded body was trimmed to finish a divided enclosure cover having a desired shape (FIG. 13). The split siege cover
A flange portion serving as a connecting portion 33 at both ends in the length direction, and a joint portion in which the divided surrounding cover extends along the extending direction, having a length of 300 mm, a flange width of 50 mm, a distance between both flange ends of 220 mm, and a thickness of about 4 mm. (32) and a divided enclosure cover 1 (14 and 15 on the left in FIG. 1) having a flange portion, and
A flange portion, which is a length of 98 mm, a flange width of 50 mm, a distance between both flange ends of 220 mm, and a thickness of about 4 mm, and which is a connecting portion 33 at one end in the length direction, and a joint portion in which the divided enclosure cover extends along the extending direction. The divided enclosure cover 2 (FIG. 1, right, 16 and 17) which has the flange part used as (32) was obtained.
The concavo-convex pattern formed on the inner wall surface of the divided enveloping cover was a Chijimi pattern shown in FIG. 17, and the maximum difference between the bottom of the concave portion and the top of the convex portion was about 0.5 mm.
It is considered that the length of the surrounding cover is preferably about 1 to 4 m in consideration of construction efficiency.

(Patch material)
A pattern 1 corresponding to the concave / convex pattern (stigma pattern shown in FIG. 17) on the surface of the patch member facing the metal tube (also referred to as the inner wall surface of the patch member) corresponds to the variable portion (21) in addition to the entire surface. A release agent is applied to a female die having a semi-cylindrical shape (the diameter of the outer periphery of the cross section is 105 mm) on which a pattern 2 corresponding to the linear pattern is formed at a predetermined position, and a liquid vinyl ester and a curing agent are applied thereon. Then, a transparent liquid mixture of the curing accelerator is applied, a glass fiber sheet is overlaid thereon, and the transparent liquid mixture is further applied to form an FRP resin layer. The coating amount of the liquid mixture and the basis weight of the glass fiber sheet are adjusted and selected so that the FRP molded body obtained by curing the FRP resin layer has a desired thickness.
After the FRP resin layer was solidified, the FRP molded body was peeled from the female mold, and the FRP molded body was trimmed to finish a transparent patch member having a desired shape (FIG. 18). The patch member
The length is 91 mm, the distance between both sides in the length direction is 94 mm, and the thickness is about 2.5 mm.
On the sticking side facing the metal tube,
Pattern 1 of Chijimi pattern shown in FIG.
A pattern 2 having a groove length of 91 mm, a groove depth of 1.5 mm, and an inter-groove distance of 10 mm constituting the linear pattern was formed.

  Since the patch member as shown in FIG. 18 has a radius of curvature that will be described later and substantially matches the outer peripheral wall (11) of the metal tube (10) in accordance with the standard of the metal tube (10) in advance. For example, immediately after the polishing step (step S2), the operation of attaching the patch member (20) to the water pipe (10) can be started, and the construction time can be further shortened.

(3) Attaching aspect of surrounding cover As an attaching aspect for integrally connecting a plurality of surrounding covers in a waterproof manner, the following may be mentioned.

A plurality of surrounding covers are connected along the extending direction of the metal tube to surround and cover the metal tube,
From the viewpoint of covering and covering the metal tube in a waterproof manner, if there is a gap in which the liquid can leak in the connecting portion, it is preferable to seal the gap with the adhesive 4, and the entire enclosed cover is lined with the adhesive 4. It is more preferable.

  The adhesive material 4 has adhesiveness to the material of the enveloping cover, and preferably has waterproofness and fast hardness, more preferably the adhesive materials exemplified as suitable for the adhesive materials 1 to 3, and the adhesive materials 1 to 1. Liquid compositions such as anticorrosives and lining resins that may be used as 3 may be used as the adhesive 4.

  For example, as shown in FIGS. 7 to 12, the metal pipe (10) is joined by a joint (12) such as a flange to surround the metal pipe (10) including the joint (12). When covering with, the enveloping cover (30) which has the junction part cover part (34) which covers the junction part (12) of metal pipes (10) should just be used. Thereby, the whole metal pipe (10) including a junction part (12) can be covered with the surrounding cover (30).

  For example, as shown in FIGS. 1 and 3 to 10, the surrounding cover (30) is divided into at least two parts having a coupling part (32) extending along the extending direction, and the coupling part. (32) When the metal pipe (10) is surrounded by fixing them together, it is easy even when the space between the piped metal pipe (10) and the wall is narrow. Can be attached to cover the metal tube (10).

  If there is a gap through which the liquid can leak in the coupling part (32), it is preferable to seal the gap with the adhesive material 4, and it is more preferable to line the entire surrounding cover with the adhesive material 4.

[Example of Embodiment of Flowing Water Pipe Repair Method of the Present Invention]
(1) Example of construction of the water pipe repair method of the present invention Metal sewage pipes and water pipes in which water flows are rusted due to deterioration over time, resulting in minute leaks such as micro holes, vibration, etc. There may be a potential leakage point such as corrosion has progressed to a state just before the occurrence of damage such as opening a small hole due to physical stimulation. Such a state of the metal pipe (10) such as the sewer pipe and the water pipe is discovered by a minute leak such as a water leak from the metal pipe (10).

  Since the repair of the metal pipe (10) having such a potential leak point or having a minute leak point such as water leak is applied to the outside of the metal pipe (10), it flows in the metal pipe (10). There is no need to stop the water.

According to the construction example of the flowing water pipe repairing method according to the present invention, first, the water-resistant adhesive 2 is applied to a potential leaking part such as a minute leaking part such as a microhole or a fragile part of the water pipe (10) in a normal use state. Apply.
Thereby, if there is a minute leak of water or the like leaking from the minute hole, the minute leak is stopped.
Also, make sure that potential leaked parts such as fragile parts are not easily damaged.

  Next, when the applied adhesive 2 is solidified, the peripheral portion of the repair target area where the adhesive 2 is applied is polished as necessary to remove rust.

Next, the plate-like patch member (20) is curved and attached using the adhesive 2 so as to cover the repair target portion or the repair target portion and the polished peripheral portion.
The adhesive 2 used for the patch member may be the same as or different from the adhesive 2 previously applied to the repair target portion.

  If the leakage of the liquid can be prevented from after the step 1 to the attachment of the enclosure cover in the step 2, the adhesive material that has not been solidified before the adhesive material 2 previously applied to the repair target portion is solidified. The patch member (20) may be directly pasted on the patch 2, or the patch member (20) to which the adhesive 2 has been applied in advance is not applied to the repair target location at first. You may stick through the adhesive material 2.

Moreover, if the leakage of the liquid can be prevented during the period from the step 1 to the attachment of the enclosure cover in the step 2, the patch member (20) is directly attached to the repair target portion without using the adhesive 2. May be.
In this case, the surface of the patch member (20) facing the outer wall of the metal tube is derived from the material of the patch member (20) or the surface shape such as fine irregularities formed, It is preferable that the adhesiveness and the adhesiveness are good.

  When the variable member (21) extending in the longitudinal direction of the metal tube (10) is formed when the patch member (20) is attached to the metal tube (10), it is bent at the variable member (21). Then, the entire patch member (20) is attached to the metal tube (10) in a state of being curved along the outer peripheral wall (11) of the metal tube (10). Thereby, the patch member (20) can be better adhered to the outer peripheral wall (11) of the metal tube (10).

  Next, the adhesive 3 is applied to the entire bonding area of the patch member (20), the bonding area and its periphery, or substantially the entire metal tube (10) to which the patch member (20) is bonded. Apply and coat the metal tube (10) from above, preferably with a synthetic resin surrounding cover (30), preferably so that the inner wall of the surrounding cover (30) contacts the adhesive 3 This completes the repair.

  After the adhesive material 3 is applied on the patch member (20) in advance and the patch member (20) is adhered, the surrounding cover (30) is preferably the inner wall of the surrounding cover (30). The metal tube (10) may be surrounded and covered so as to contact 3.

The surrounding cover may surround and cover the metal tube (10) so that the inner wall of the surrounding cover is not in contact with the patch member (20) without using the adhesive material 3 without using the adhesive material 3.
In this case, the surface of the patch member (20) facing the enveloping cover is derived from the material of the patch member or the surface shape, for example, where fine irregularities are formed. Good is preferred.

For example, when the surrounding cover (30) is made of FRP, a plurality of surrounding covers (30) are connected along the extending direction of the metal tube (10) to surround and cover the metal tube (10). Then, the entire surrounding cover (30) is applied or lined with the adhesive 4. Thereby, the connected surrounding cover (30) is united, and the surrounding cover (30) itself becomes a tubular body.
Therefore, even if water leakage or the like newly occurs from the metal pipe (10) itself, the surrounding cover (30) does not leak water to the outside.

  The surrounding cover (30) has a coupling part (32) extending along the extending direction, and is divided into at least two parts, and the coupling part (32) is fixed together to fix the metal tube. When it is intended to surround (10), it can be easily attached to cover the metal tube (10) even when the space between the piped metal tube (10) and the wall is narrow. it can.

  Further, when the metal pipe (10) is joined by a joint (12) such as a flange so as to surround and cover the metal pipe (10) including the joint (12), the metal pipe ( 10) What is necessary is just to use the surrounding cover (30) which has the junction part cover part (34) which covers the junction part (12) of each other. Thereby, the whole metal pipe (10) including a junction part (12) can be covered with the surrounding cover (30).

  Further, when the patch member (20) is formed with a variable portion (21) extending in a predetermined direction, the entire outer peripheral wall (11) of the metal tube (10) is bent by the variable portion (21). Therefore, it can be easily and satisfactorily adhered to the metal tube (10).

  According to the flowing water pipe repairing method according to the present invention, since the repair is performed outside the metal pipe, it is possible to construct the water pipe without stopping the water flowing through the metal pipe. Metal pipes can be repaired without inconvenience to building tenants, building users, building residents, and the like.

  Moreover, since it can construct without stopping the water which flows in a metal pipe, the construction time slot | zone is not restrict | limited in particular, A construction period can be shortened significantly.

  Furthermore, since the surrounding cover is integrated into a tubular body, even if the inner metal pipe is corroded and a new hole is opened, water does not leak from the surrounding cover, and the surrounding cover functions as a water pipe. Can fulfill.

(2) Explanation of embodiment by drawing of flow water pipe repair method of the present invention (component)
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a metal water pipe being repaired by a water pipe repair method according to an embodiment of the present invention,
FIG. 2 is a flowchart showing a running water pipe repair method according to an embodiment of the present invention.
FIG. 3 is a side view showing a state in which the surrounding cover is attached to the water pipe,
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a side view showing a quick-connection portion of the surrounding cover of the repaired water pipe,
6 is a cross-sectional view taken along line BB in FIG. In addition, in FIG. 6, the hatching which shows a cross section is put only in the cross section of the water pipe.

As shown in FIG. 1, the present invention is a repair method for repairing a metal water pipe (10) through which water mainly flows, such as a water pipe and a sewage pipe.
This repair method is applied to the outer peripheral wall (11) of the water pipe (10) against a potential leaking part such as a minute leaking part such as a minute hole generated in the water pipe (10) or a fragile part that may be damaged due to rusting. The plate-like patch member (20) is attached to the) side, and the entire water pipe (10) is surrounded and covered by the surrounding cover (30).

  The patch member (20) is preferably a plate-like member made of glass (fiber), synthetic resin or metal. In particular, FRP (Fiber Reinforced Plastics) is preferable. The patch member (20) is preferably formed with a variable portion (21) extending in a predetermined direction. The variable portion (21) is a portion that is made thin by forming a groove, for example, and can be easily bent. In the illustrated example, a plurality of variable portions (21) extending linearly are formed to be parallel to each other.

  By having the variable part (21), when the patch member (20) is attached to the water pipe (10), the extending direction of the variable part (21) is made to coincide with the extending direction of the water pipe (10). The member (20) can be appropriately bent at the variable portion (21) so that the entire patch member (20) can be bent along the cylindrical surface of the outer peripheral wall (11) of the water pipe (10). The illustrated patch member (20) is formed in a quadrilateral shape, but is not limited to the shape, and may be a circle, a triangle, or other polygons.

  The enveloping cover (30) surrounds and covers the water pipe (10) after the patch member (20) is attached to a minute leak location such as a microhole or a potential leak location such as a fragile portion. The surrounding cover (30) is made of synthetic resin, but FRP is preferable. In the present embodiment, the surrounding cover (30) is described as being made of FRP.

The encircling cover (30) shown in the figure preferably has a shape in which the cylindrical body is divided into at least two parts so as to be divided into two equal parts along a plane along its longitudinal direction. The water pipe (10) can be surrounded and covered in pairs.
The number of divisions is not limited to two and may be divided into three or more divisions.

Moreover, the surface which divides | segments a cylindrical body along the longitudinal direction is not restricted to a plane, The surface which twisted the plane may be sufficient.
Furthermore, you may make one incision over the full length along a longitudinal direction, without dividing | segmenting.
In this case, the cut portion may be expanded and the water pipe may be covered from the expanded portion.

  The surrounding cover (30) is preferably a cylindrical side wall part (31) and a joint part which is a flange extending radially outward from an edge extending along the longitudinal direction of the side wall part (31). (32) and a connecting portion (33) which is a flange extending radially outward from the both end edges along both end edges of the surrounding cover (30).

In the coupling part (32), preferably, a plurality of openings for passing the bolts b are formed along the longitudinal direction of the surrounding cover (30).
This opening is formed by surrounding the water pipe (10) with a set of surrounding covers (30) and then opening the openings formed in the coupling portions (32) of the sets of surrounding covers (30) and (30). The pair of surrounding covers (30), (30) are fixed together by matching the positions and passing the bolts b through the openings and then screwing the nuts n into the bolts b.

A plurality of openings for passing the bolt b are also formed in the quick connection part (33).
This opening is for connecting multiple sets of surrounding covers (30) to each other along the water pipe (10), and by matching the positions of the openings formed in the connecting portions 33 of the adjacent sets, A set of enveloping covers (30) and (30) are fixed so as to be integrated integrally by passing a bolt b through each opening and then screwing a nut n into the bolt b.

Next, the process of the repair method of the water pipe (10) which concerns on embodiment of this invention is demonstrated.
In order to repair a potential leaking part such as a weak part where a minute leaking part such as a microhole has occurred or corrosion has progressed and the small hole is easy to open, for example, according to the process shown in FIG. Do.
During the repair, it is not necessary to stop the water flowing through the water pipe (10).

(Process 1)
First, the repair starts from a pretreatment process (step S1). In this pretreatment step, the adhesive material 2 is applied to a minute leak location such as a minute hole of the water pipe (10) or a potential leak location such as a fragile portion. For example, an adhesive having excellent water resistance such as an epoxy adhesive is applied. This treatment is to stop water leaking from micro leaks such as micro-holes (micro leaks). Application to potential leaks such as fragile parts may occur due to vibration during construction. This is to prevent the potential leaking portion from being damaged.

Next, when the applied adhesive 2 is solidified, a polishing step (step S2) is performed as necessary. In this polishing step, the peripheral portion of the repair target portion where the adhesive 2 is applied is polished to remove rust.
This treatment is intended to enable good adhesion with an adhesive material performed in the subsequent steps.

Next, the patch process (step S3) which sticks a patch member (20) so that a repair object location and the said grinding | polishing periphery part may be covered is implemented.
The patch member (20) is stuck so that the extending direction of the variable portion (21) is the longitudinal direction of the water pipe (10). At that time, the variable portion (21) is appropriately bent so that the entire patch member (20) is deformed so as to follow the curvature of the outer peripheral wall (11) of the water pipe (10), and then applied to the repair target portion in advance. Adhere on the adhesive 2 that has been placed.
Thereby, an opening can be closed reliably and a weak part can be reinforced.

  If the repair target location is a potential leak location or can be stopped even if there is a slight leak, the adhesive material 2 that has not solidified before the adhesive material 2 previously applied to the repair target location solidifies. The patch member (20) may be directly attached on the surface, or the patch member (20) to which the adhesive material 2 has been applied in advance is bonded to the repair target location without first applying the adhesive material 2 to the repair target location. You may stick through the material 2.

If the repair target location is a potential leak location or can be stopped even if it is slightly leaked, the patch member (20) is directly attached to the repair target location without using the adhesive 2 Also good.
In this case, the surface of the patch member (20) facing the outer wall of the metal tube is derived from the material of the patch member (20) or the surface shape such as fine irregularities formed, It is preferable that the adhesiveness and the adhesiveness are good.

  If the repair target part is extremely fragile and the repair target part may be damaged by vibration generated in the polishing process (step S2) even after the pretreatment process (step S1), the patch is used. The process (step S3) and the polishing process (step S2) may be reversed.

(Process 2)
Next, a surrounding cover attaching step (step S4) is performed in which the water pipe (10) is surrounded and covered by the surrounding cover (30).
In this step, the adhesive 3 is applied to the adhesive region 3 on the adhesive region of the patch member (20), or on the adhesive region and its periphery, or substantially the water (tube 10) to which the patch member (20) is adhered. Then, the water pipe (10) is surrounded and covered by two divided surrounding covers (30).

  After the adhesive material 3 is applied on the patch member (20) in advance and the patch member (20) is adhered, the surrounding cover (30) is preferably the inner wall of the surrounding cover (30). The metal tube (10) may be surrounded and covered so as to contact 3.

The surrounding cover may surround and cover the metal tube (10) so that the inner wall of the surrounding cover is not in contact with the patch member (20) without using the adhesive material 3 without using the adhesive material 3.
In this case, the surface of the patch member (20) facing the enveloping cover is derived from the material of the patch member or the surface shape, for example, where fine irregularities are formed. Good is preferred.

Further, the openings formed in the side wall portions (31) of the surrounding covers (30) and (30) are matched to pass the bolt b, and the nut n is screwed to the bolt b to be integrally fixed.
Further, the FRP adhesive 4 is applied or lined to the entire surrounding cover (30) including the side wall portion (31) and its peripheral portion or the side wall portion (31).
Thereby, it becomes a tubular body in which a set of surrounding covers (30), (30) is integrated.

A set of surrounding covers (30), (30) can connect a plurality of sets.
In this case, a pair of adjacent surrounding covers (30), (30) pass through the bolts b with the openings formed in the respective connecting portions (32), and the nuts n are screwed into the bolts b. Let them connect.
If there is a gap through which the liquid can leak in the coupling part (32), it is preferable to seal the gap with the adhesive material 4, and it is more preferable to line the entire surrounding cover with the adhesive material 4. When the surrounding cover is FRP, it is preferable to apply or lining the FRP adhesive 4 as the adhesive 4 to the coupling portion (32).

What is connected in this way is like a single tube.
Thereby, it becomes a tubular body in which a plurality of connected surrounding covers (30) and (30) are integrated.

  In this way, the integrated surrounding cover (30) can serve as a water pipe through which the surrounding cover (30) passes water even if the inner water pipe (10), for example, is corroded. .

  As described above, without leaking the water flowing through the water pipe (10), repair the potential leaked parts such as micro leaks and fragile parts of the water pipe (10) quickly and reliably. Can do.

Next, a modified example of the surrounding cover (30) will be described.
In addition, the same code | symbol is attached | subjected to the site | part of the same kind as the said surrounding cover (30), and the overlapping description is abbreviate | omitted.
FIG. 7 is a perspective view showing a water pipe (10) in which a metal pipe repair method is being constructed using a modified surrounding cover (30) A,
FIG. 8 is a longitudinal sectional view showing a state in which the surrounding cover (30) A is cut along the longitudinal direction;
FIG. 9 is a cross-sectional perspective view showing a state in which the surrounding cover (30) A is cut at the joint cover portion (34).
FIG. 10 is a perspective view showing the water pipe (10) in which the metal pipe repair method is being constructed in a state in which the surrounding cover (30) A is opened,
FIG. 11 is a side view showing the inside of the surrounding cover (30) A.
Furthermore, FIG. 12 is explanatory drawing which looked at the water pipe (10) currently constructed with the repair method of a metal pipe using the surrounding cover (30) A from the side.

As can be seen from FIGS. 10 and 12, the surrounding cover (30) A can cover the water pipe (10) including the portion where the water pipe (10) is joined by the flange (12).
For this reason, the surrounding cover (30) A is provided with a joint cover portion (34) that covers the flange (12) of the water pipe (10).

The joint cover portion (34) has an inner diameter larger than the outer diameter of the flange (12) of the water pipe (10) when the joint portions (32) of the surrounding cover (30) A are fixed together, and the width is flange. It is formed wider than twice the thickness of (12).
The joint cover portion (34) may be formed integrally with the middle portion of the surrounding cover (30) A, or may be formed separately and enclosed on both sides using an adhesive during construction. You may adhere | attach so that A may be united.

After the surrounding cover (30) A is attached to the outer peripheral wall (11) of the water pipe (10) and the joint cover part (34) is attached so as to cover the flange (12), liquid leaks to the joint and the like. If there is a gap that can be obtained, the gap is preferably sealed with the adhesive 4, and the surrounding cover (30) A and the entire joint are more preferably applied or lined with the adhesive 4.
Further, for example, if the material of the surrounding cover (30) A is FRP, the surrounding cover (30) A is mounted on the outer peripheral wall (11) of the water pipe (10), and the joint cover is covered so as to cover the flange (12). After mounting the part (34), the FRP adhesive 4 may be applied or lined to the surrounding cover (30) A and the joint cover part (34) so that they are integrated.

  The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention.

For example, in the above-described embodiment, the patch member (20) has been described as having the variable portion (21) extending in a predetermined direction. However, the patch member (20) conforms to the standard of the water pipe (10) in advance. Prepare multiple types of different radii of curvature so that they substantially match the outer peripheral wall (11) of the water pipe (10), and select the one that matches the outer diameter of the water pipe (10) at the construction site each time. It may be used.
In this case, for example, immediately after the polishing step (step S2), the work of attaching the patch member (20) to the water pipe (10) can be started, and the construction time can be further shortened.

  If the outer peripheral wall (11) is in a state where rust is not generated but there is no need for polishing in the case where a minute hole is opened for some reason, the polishing step (step S2) may be omitted. .

  Further, the water pipe (10) extending linearly as a metal pipe to be repaired is illustrated and described. However, when repairing a water pipe or elbow-shaped water pipe branched into a Y-shape or Tu, the outer peripheral wall of the water pipe Needless to say, it is sufficient to use an enveloping cover that is formed in a shape that matches the shape that extends.

From the above embodiments, the metal repair method of the present invention also discloses the following modes.
[1] A metal pipe repair method for repairing a fragile portion that may generate a small hole due to a stimulus such as a minute hole or vibration on the pipe wall of a metal pipe (10) through which liquid flows. There,
Apply adhesive to the micropores and fragile parts of the metal tube (10),
A plate-shaped patch member (20) is stuck on the repair target part,
An adhesive is applied from above the metal tube (10) and the patch member (20), and a synthetic resin surrounding cover (30) is attached to surround the metal tube (10) from above. Metal pipe repair method.

[2] This is a metal pipe repair method for repairing a pipe wall of a metal pipe (10) in which water flows inside to repair a brittle part that may cause a small hole due to a stimulus such as a microhole or vibration. And
Apply a water-resistant adhesive to the micropores and fragile parts of the metal tube (10),
A plate-shaped patch member (20) is stuck on the repair target part,
A metal characterized in that an adhesive is applied from above the metal tube (10) and the patch member (20), and an FRP enclosure cover (30) is attached from above the metal tube (10) to cover the metal tube (10). Pipe repair method.

[3] A plurality of surrounding covers (30) are connected along the extending direction of the metal tube (10) to surround and cover the metal tube (10), and the entire connected surrounding cover (30) is an adhesive. 4. The metal pipe repairing method according to item [1] or [2], wherein the surrounding cover (30) is formed so as to be integrated by lining at 4.

[4] The surrounding cover (30) is divided into at least two parts having a connecting part (32) extending along the extending direction of the surrounding cover (30). 32) The metal pipe repair method according to any one of items [1] to [3], wherein the metal pipe (10) is surrounded by fixing them together.

[5] When enclosing and covering the metal tube (10) including the joint portion (12) where the metal tubes (10) are joined together, the enveloping cover (30) is used for the metal tube (10). The metal pipe repairing method according to any one of items [1] to [4], wherein the metal pipe repairing method includes using a joint cover portion (34) that covers the joint portion (12).

[6] The patch member (20) is formed with a variable portion (21) extending in a predetermined direction. The patch member (20) is bent by the variable portion (21) to be entirely outer peripheral wall (11) of the metal tube (10). The metal pipe repairing method according to any one of items [1] to [5], wherein the metal pipe (10) is attached to the metal pipe (10) in a state of being bent along the line.

[7] An enveloping cover (30) used for the metal pipe repair method described in any one of [1] to [6].

b ... bolt n ... nut 10 ... water pipe (metal pipe)
11 ... outer peripheral wall 12 ... flange (joint)
DESCRIPTION OF SYMBOLS 20 ... Patch member 21 ... Variable part 30 ... Surrounding cover 30A ... Surrounding cover 31 ... Side wall part 32 ... Connection part 33 ... Connection part 34 ... Joint part cover part

Claims (12)

A water pipe repair method for repairing a water pipe in which liquid flows inside,
A step 1 of attaching a patch member or arranging an adhesive 1 on a repair target portion of the water pipe;
And a step 2 of attaching an enveloping cover that covers the water pipe on which the patch member is adhered or the adhesive material 1 is disposed so as to be waterproof.
The running water pipe is piped in the building,
At least after the step 1 until the enclosure cover is attached in the step 2, the flowing water pipe repair method in which leakage of the liquid from the repair target portion is stopped.   The flowing water pipe repairing method according to claim 1, wherein in the step 1, the patch member is stuck on the repair target portion via an adhesive 2.   The water pipe repairing method according to claim 1 or 2, wherein, in the step 2, the surrounding cover is covered by covering the water pipe with an adhesive 3 on the patch member.   The water pipe repair method according to any one of claims 1 to 3, wherein in the step 2, the surrounding cover is attached so that an inner wall of the surrounding cover is in contact with the patch member, the adhesive material 1 or the adhesive material 3. .   5. The water pipe repair according to claim 1, wherein, in the step 2, the plurality of surrounding covers are connected along a direction in which the water pipe extends so as to surround and surround the water pipe in a waterproof manner. Construction method.   In the step 2, the surrounding cover is divided into at least two parts having a connecting part extending along the extending direction of the surrounding cover, and the connecting parts are fixed together. The method of repairing a water pipe according to any one of claims 1 to 5, wherein the water pipe is covered with water resistance.   The water pipe repair method according to any one of claims 1 to 6, wherein the surrounding cover is made of a synthetic resin.   The flush pipe repair method according to any one of claims 1 to 7, wherein a surface of the patch member facing the flush water pipe outer wall has an uneven area.   The flowing water pipe repairing method according to any one of claims 1 to 8, wherein a portion of the inner wall of the surrounding cover that contacts the patch member, the adhesive 1 or the adhesive 3 has an uneven region. It can be obtained by repairing with the flowing water pipe repair method according to any one of claims 1 to 9.
For arranging in the building and flowing water inside,
A composite pipe comprising the water pipe, the patch member or the adhesive 1 and the surrounding cover. The flowing water pipe according to any one of claims 1 to 9, wherein the patch member according to any one of claims 1 to 9 is adhered or the adhesive 1 is disposed.
Surrounded and covered by the enclosure cover according to claim 1,
A composite pipe that is installed in a building and allows water to flow inside. The running water pipe repair method according to any one of claims 1 to 9,
The envelope cover according to any one of claims 1 to 9 for use in the composite tube according to claim 10 or the composite tube according to claim 11.