JP2008162033A - Lining material for branch pipe and method for lining branch pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining material for a branch pipe which does not waste fibers and an epoxy resin used in the lining material and can smoothly carry out the lining of the branch pipe excellent in economical properties, and a method for lining the branch pipe. <P>SOLUTION: In the method for lining the branch pipe, a tubular nonwoven fabric whose diameter is approximately equal to that of the branch pipe is inserted into an inner film formed of a tubular plastic film whose diameter is approximately equal to that of the nonwoven fabric. The tubular nonwoven fabric is impregnated with an uncured epoxy resin. An excess length part which is made by making the inner film longer than the cylindrical nonwoven fabric and into which the cylindrical nonwoven fabric is not inserted is set at the terminal end of the lining material. As the lining material of the branch pipe with the terminal end of the lining material sealed with the excess length part, the conduit length of the branch pipe is measured in advance to be a size making the whole excess part protrude into a main pipe when the lining material is inserted into the branch pipe. After the lining material is inserted into the branch pipe and cured while being reversed by fluid pressure, the inner film is peeled off, and the part protruding into the main pipe of the lining material is cut. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lining process for a pipe line, and more particularly to a lining material used when performing a lining process for a branch pipe that joins a main pipe, and a lining process method for a branch pipe using the lining material.

  When a pipe line such as a sewer pipe buried in the ground has deteriorated, an uncured thermosetting resin is impregnated into a tubular nonwoven fabric having the same diameter as that of the pipe line in order to repair and reinforce it. Using the lining material thus formed, the lining material is inserted into the pipe line and cured while being in close contact with the inner wall, and the lining process is performed to repair and repair the pipe line.

  In such a lining process, as a means for inserting the lining material into the pipe line, there is also a means for inserting the lining material by pulling it with a rope or the like. In many cases, a means for inserting from the upstream pipe port of the branch pipe to the downstream main pipe connection port while being reversed by the fluid pressure by water or the like is suitable.

  As a means for curing the uncured thermosetting resin impregnated in the tubular nonwoven fabric of the lining material inserted into the pipe line by reversal, hot water is drawn inside the lining material by being pulled by the end of the lining material inserted into the pipe line. Insert the supply hose, connect the hot water supply hose to the boiler, and supply warm water from the hot water supply holes provided at appropriate intervals in the hot water supply hose to heat the lining material. It is made to harden.

  The supplied hot water is circulated so that it is supplied to the boiler by the water intake hose connected to the boiler that is put inside the lining material, heated and supplied again from the hot water supply hose. Is common.

  Such a lining process is performed not only on the main pipe but also on the branch pipe connected to the main pipe. Generally, the lining process of the branch pipe is performed together with the lining process of the main pipe. When the lining process of the branch pipe connected to the main pipe is performed after the lining has been performed, the connection port between the main pipe and the branch pipe is blocked by the cured lining material by performing the lining process of the main pipe. Therefore, after performing the opening process of the connection port, the lining process of the branch pipe connected to the connection port is performed.

  And, at the connection port between the branch pipe and the main pipe, it is desirable that liquid such as drainage flowing through the pipeline after the lining treatment should not leak from the periphery of the connection port to the outside of the pipeline. In addition, the lining material of the branch pipe and the lining material of the main pipe are bonded and integrated at the connection port.

  However, in such a lining process, in a lining process in which a pipe line is obliquely or vertically installed from the vicinity of the ground surface to the base and is connected to the main pipe, the lining process is performed to particularly cure the lining material. When hot water is injected into the inside of the material, the lining material inserted at a predetermined position may be displaced downward due to the injected hot water load.

  Therefore, the lining material to be inserted into the branch pipe protrudes into the main pipe from at least the branch pipe and is inserted to a position where it contacts the inner wall of the main pipe facing the connecting port from which the lining material protrudes. The lining material is cured at a predetermined position so that a load caused by hot water injected into the lining material is received by the inner wall of the main pipe.

  The portion of the lining material that is used for the lining treatment of the branch pipe and protrudes into the main pipe from the connection port of the branch pipe is hardened together with the hardening treatment of the lining material inside the branch pipe, and then the main pipe. And cut or deleted to secure the branch pipe.

JP-A-6-234160

  Here, the portion of the lining material that protrudes from the connection port of the branch pipe into the main pipe and is hardened is of a size that crosses the main pipe, and is cut or deleted inside the pipe line. Since this is a work, it is time consuming and wasteful because the portion is discarded.

  In addition, when the lining material of the branch pipe and the lining material of the main pipe are bonded and integrated at the connection port, they are bonded through the cut surface of the lining material, and the bonding area is narrow and integrated with sufficient strength. It was hard to say.

  The present invention has been made in view of such difficulties, and the problem to be solved is not shifted due to the load of hot water injected during the curing process in the lining process of the branch pipe, and the curing is performed. After processing, it is easy to cut and delete the part protruding from the branch pipe to the main pipe, and minimize the waste of resin material and fiber material used for the cut or deleted part. To provide a lining material for a branch pipe and a lining treatment method for the branch pipe, which are made by minimizing and additionally joining the lining material of the branch pipe and the lining material of the main pipe with sufficient strength at the connection port. It is in.

  In order to solve the above-mentioned problems, the present invention is a part in which a lining material used for a lining process of a branch pipe is inserted into the branch pipe and protrudes into the main pipe from a connection port with the main pipe of the branch pipe. In this case, except for a small portion from the connection port, most of the fiber material impregnated with the resin material is not used, so that the lining material is cured from the connection port to the inside of the main pipe. Minimizing the time and effort required for cutting and deleting the protruding portion, and minimizing waste by minimizing the resin material and fiber material used for the cut and deleted portion.

That is, the lining material of the branch pipe according to the invention of claim 1 is
A tubular nonwoven fabric having the same diameter as the inner diameter of the branch pipe to be lined is inserted into an inner film made of a tubular plastic film having the same diameter as the outer diameter of the nonwoven fabric, and the tubular nonwoven fabric is impregnated with an uncured epoxy resin. Lining material,
At the end of the lining material,
The inner film is made longer than the tubular nonwoven fabric.
Provide an extra length that is not inserted into the tubular nonwoven fabric,
The end of the lining material
It is sealed with the extra length.

Moreover, the lining processing method of the branch pipe by invention of Claim 2 of this invention is the following.
In the lining material according to the invention of claim 1,
While reversing the lining material with fluid pressure from the beginning of the lining material,
When inserted from the upstream pipe port of the branch pipe to the downstream main pipe connection port,
The length of the lining material is
The entire length of the extra portion of the lining material projects into the main pipe from the main pipe connection port.

And the lining processing method of the branch pipe by invention of Claim 3 of this invention is the following.
Using the lining material according to the invention of claim 1,
Measure the length of the branch pipe to be lined in advance,
While reversing the lining material with fluid pressure from the beginning of the lining material,
When inserted from the upstream pipe port of the branch pipe to the downstream main pipe connection port,
The length of the lining material is
The entire length of the extra portion of the lining material is set to project into the main pipe from the main pipe connection port,
While reversing the lining material with fluid pressure from the beginning of the lining material,
Insert from the upstream pipe port of the branch pipe to the downstream main pipe connection port,
After curing the uncured epoxy resin of the lining material,
Peeling the inner film of the lining material,
Next, the cured lining material is
A portion projecting into the main pipe from the main pipe connection port of the branch pipe is cut.

Moreover, the lining processing method of the branch pipe by invention of Claim 4 of this invention is the following.
In the lining method according to the invention of claim 3,
After inserting an outer film made of a tubular plastic film having substantially the same diameter as the inner diameter of the branch pipe into the branch pipe to be lined from the upstream pipe port to the downstream main pipe connection port,
A lining material is inserted inside the outer film.

  According to the present invention as described above, the lining material to be inserted into the branch pipe has an inner wall of the main pipe in which the extra length protruding from the connection port of the branch pipe into the main pipe faces the connection port. By contacting the lining material, even when hot water is injected for curing the lining material, the tubular nonwoven fabric impregnated with the epoxy resin can be cured in a stable state without shifting.

  After the lining material is cured, the extra length is removed by removing the inner film. Therefore, the portion protruding from the branch port to the main pipe from the branch pipe is a slight amount of the tubular nonwoven fabric impregnated with epoxy resin. It becomes only an end portion, and this portion can be easily cut and deleted according to the inner wall of the main pipe.

  In addition, the extra length is expanded by the water pressure of the hot water injected for the hardening treatment of the lining material and is slightly expanded from the diameter of the branch pipe, so that the epoxy resin that protrudes from the branch pipe to the main pipe from the branch pipe The slight end portion of the tubular nonwoven fabric impregnated with flared has a flare shape, and can be securely bonded and integrated with the lining material of the main pipe subjected to the lining treatment with sufficient strength.

  Further, by performing the lining treatment using the outer film, the epoxy resin impregnated in the tubular nonwoven fabric of the lining material can be cured without being affected by the moisture of the branch pipe to be lining.

  The best mode for carrying out the above-described branch pipe lining material and the branch pipe lining processing method according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a terminal portion before the lining material 10 is inverted, and FIG. 2 is a longitudinal sectional view showing a terminal portion after the lining material 10 is inverted.

  The lining material 10 is in a state before insertion into the pipe line 1 to be lined before inversion, and is usually flexible without applying pressure to the inside thereof, and has a shape in which the cross section is flattened and flattened. In addition, after inversion, it is in a state after being inserted into the pipe line 1 to be lined, and is usually applied with pressure or hardened inside, and the cross section is the pipe line It has a shape along the inner wall.

  3 to 5 are cross-sectional views showing respective stages of the process of inserting the lining material 10 by the lining processing method according to the present invention into the branch pipe 1 to be lined from the ground surface to the main pipe 2 buried in the ground. 3 is a cross-sectional view showing a stage of preparation for reversal of the lining material 10, FIG. 4 is a cross-sectional view showing a stage in the middle of reversal of the lining material 10, and FIG. FIG. 6 is a cross-sectional view showing the end stage of reversal of material 10.

  6 and 7 are cross-sectional views showing each stage of the process after the lining material 10 has been inserted into the branch pipe 1 to be lined, and FIG. 6 shows the stage where the lining material 10 is being cured. FIG. 7 is a cross-sectional view showing a step of removing the inner film 11 from the lining material 10 after being cured.

  FIG. 8 shows the shape of the cured lining material 10 by cutting and removing a portion protruding from the main pipe 2 and bonding the lining material 10 applied to the main pipe by the lining treatment and the connection port 3. FIG. 9 is a cross-sectional view showing a state in which the lining process according to the present invention is finished, and FIG.

  In this embodiment, the lining processing method of the branch pipe 1 using the branch pipe lining material 10 according to the present invention is a natural flow pipe such as a sewer pipe buried mainly in the ground as shown in FIGS. The main pipe 2 is intended for a branch pipe 1 connected from the ground side via a connection port 3. The main pipe 2 is subjected to a lining process by lining the main pipe 2. This is performed after forming the lining layer 4 and opening the portion corresponding to the connection port 3 of the main lining layer 4 along with the branch pipe 1.

  The lining material 10 is made of a plastic film made of polyurethane, polyethylene, nylon, vinyl chloride, or the like, and has a highly airtight and flexible inner film 11 made of a tube having a diameter substantially the same as the inner diameter of the branch pipe 1 to be lined. Inside, a tubular nonwoven fabric 12 of substantially the same diameter of the inner film 11 made of a nonwoven fabric composed of polyester, polypropylene, acrylic resin or the like is inserted, and the tubular nonwoven fabric 12 is uncured prior to the lining treatment. It is impregnated with an epoxy resin.

  The end portion of the lining material 10 is provided with an extra length portion 13 in which the tubular non-woven fabric 12 is not inserted, and is formed by making the inner film 11 longer than the tubular non-woven fabric 12. The extra length part 13 is sealed.

  That is, the inner film 11 is formed as a lining material 10 containing a tubular non-woven fabric 12 impregnated with an uncured epoxy resin inside the inner film 11 in a bag shape whose one end is sealed with an extra length portion 13. Ready for the lining process.

  The length of the lining material 10 is determined by measuring in advance the length of the branch pipe 1 to be lined, and the tubular nonwoven fabric 12 is connected to the main pipe 2 from the connection port 3 of the branch pipe 1. The inner film 11 is longer than the tubular nonwoven fabric 12 and preferably has a length that contacts the inner wall of the main pipe 2 facing the connection port 3 of the branch pipe 1.

  As shown in FIG. 3, the lining material 10 provided for the lining process as described above is a hot water that is used for the curing process of the lining material 10 that is accommodated in the pressurizing chamber 21 and fed out at the terminal end 14. A supply hose 23 is connected and accommodated in the pressurizing chamber 21 of the reversing device 20.

  Then, the unsealed start end 16 on the opposite side to the end 14 is fixed to the nozzle 22 leading from the pressurizing chamber 21 to the outside together with the tubular non-woven fabric 12 inside thereof, and is fixed to the branch. Provided for inversion insertion into the tube 1.

  In this embodiment, the lining material 10 is reversed using the reversing device 20, but in addition to this, water pressure is applied to the portion where the lining material 10 is reversed, and the lining material 10 is reversed. In some cases, such a reversing method is appropriately selected in consideration of the diameter and length of the branch pipe 1 to be lined and the ground space for the lining process.

  Further, as shown in FIG. 3 and the like, in this embodiment, before inserting the lining material 10 into the branch pipe 1, it is made of a plastic film made of polyurethane, polyethylene, nylon, vinyl chloride, or the like. A highly airtight and flexible outer film 15 having a substantially the same diameter as the inner diameter of the branch pipe 1 to be lined is inserted, and the lining material 10 is placed inside the outer film 15 inserted into the branch pipe 1. This is done by flip-inserting.

  As a result, for example, it is possible to suppress a curing failure due to a temperature drop of the lining material 10 due to moisture entering from a crack generated in the inner wall of the branch pipe 1, and a lining process that is hardly affected by the condition of the branch pipe 1 can be performed. Therefore, it is preferable.

  First, as shown in FIG. 4, when the pressurizing chamber 21 of the reversing device 20 is pressurized, the lining material 10 accommodated in the pressurizing chamber 21 is fed out while being reversed from the nozzle 22, and the head thereof. Is introduced into the opening on the ground side of the branch pipe 1 to be lined, and insertion into the branch pipe 1 via the outer film 15 is started.

  Next, when the reversal of the lining material 10 is completed as shown in FIG. 5, the start side 16 on the ground side of the lining material 10 is fixed to a flange or the like (not shown) as shown in FIG. Warm water is supplied by connecting the ground side of 23 to the boiler 24, and hot water is supplied to the inside of the lining material 10 from a number of holes drilled in the portion corresponding to the inside of the branch pipe 1 of the hot water supply hose 23. The lining material 10 is heated and thereby slowly cured.

  The hot water injected into the lining material 10 is supplied to the boiler 24 by a water intake hose 25 introduced into the hot water injected into the lining material 10, and circulates between the inside of the lining material 10 and the boiler 24. It is preferable to do so.

  At this time, the inner film 15 of the extra length portion 13 is swelled beyond the diameter of the branch pipe 1 inside the main pipe 2 due to the water pressure by the hot water injected into the lining material 10, thereby the lining material 10 is The epoxy resin impregnated in the tubular nonwoven fabric 12 does not shift downward due to gravity until it completely cures.

  Next, when the curing treatment of the lining material 10 is completed, the hot water inside the lining material 10 is discharged, and then the terminal end 14 is pulled to the ground side by a rope connected thereto, so that the cured epoxy resin is impregnated. The inner film 11 is peeled off from the tubular nonwoven fabric 12 and removed.

  That is, as shown in FIG. 7, the end portion of the lining material 10 that has been hardened and from which the inner film has been removed forms a protruding portion 17 that protrudes from the inside of the branch pipe 1 to the inside of the main pipe 2. 17 has a flared shape that increases in diameter toward the end, and is formed in close contact with the main lining layer 4 in the hole of the connection port 3 of the main lining layer 4.

  Finally, the protruding portion 4 is cut and removed along with the inner surface of the main lining layer 4 formed in the main pipe 2 and bonded to the main lining layer 4, as shown in FIG. In particular, in the vicinity of the connection port 3, as shown in FIG. 9, the lining layer of the lining material 10 of the branch pipe 1 is flared to form wrinkles, forming a gentle curved surface, and forming the main lining layer 4. And become one.

  Therefore, in general, the branch pipe 1 to be lined is in the vicinity of the connection port 3 with the main pipe 2 and in the vicinity of the connection port 3, so that the liquid can flow smoothly without any stagnation. Although the diameter of the road is often thick, even if the branch pipe lining treatment method according to the present invention is applied to such a branch pipe 1 using the branch pipe lining material according to the present invention, the lining treatment is not performed. The functionality expected of the pipeline is not impaired.

  According to the branch pipe lining material according to the present invention, the branch pipe lining material according to the present invention is used to smoothly line the branch pipe without impairing the functionality expected of the pipeline before the lining process. It is possible to perform the treatment, and it is possible to perform the lining processing of the branch pipe excellent in economic efficiency without waste in the fiber and epoxy resin used for the lining material.

Longitudinal section of the end part of the lining material before inversion Longitudinal section of the end of the lining material after inversion Sectional view of the stage of preparation for reversing the lining material Cross-sectional view of the lining material in the middle of inversion Cross-sectional view at the end of the reversal of the lining material Cross-sectional view of lining material curing process Cross section of the stage of inner film removal Cross section by lining process Enlarged sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lining material 11 Inner film 12 Tubular nonwoven fabric 13 Surplus length part 14 Termination 15 Outer film 16 Starting end 17 Protruding part 20 Inversion device 21 Pressurizing chamber 22 Nozzle 23 Hot water supply hose 24 Boiler 25 Intake hose 1 Branch pipe 2 Main pipe 3 Connection port 4 Main lining layer

Claims (4)

  A tubular nonwoven fabric having the same diameter as the inner diameter of the branch pipe to be lined is inserted into an inner film made of a tubular plastic film having the same diameter as the outer diameter of the nonwoven fabric, and the tubular nonwoven fabric is impregnated with an uncured epoxy resin. The lining material is provided with an extra length portion in which the inner nonwoven film is longer than the tubular non-woven fabric and the tubular non-woven fabric is not inserted, and the end of the lining material is provided with the extra length. A lining material for a branch pipe, characterized by being sealed at a portion.   When the lining material is inserted from the upstream end of the branch pipe to the downstream main pipe connection port while being reversed by the fluid pressure from the starting end of the lining material, the length of the lining material is set to the extra length of the lining material. The lining material for a branch pipe according to claim 1, wherein the entire portion is dimensioned to project into the main pipe from the main pipe connection port.   Using the lining material according to claim 1, the pipe length of the branch pipe to be lined is measured in advance, and the lining material is reversed from the starting end of the lining material by fluid pressure, and the upstream side of the branch pipe When the lining material is inserted from the main pipe connection port downstream to the main pipe connection port, the length of the lining material is set so that the entire extra length of the lining material projects into the main pipe from the main pipe connection port. Inserting from the upstream end of the branch pipe to the downstream main pipe connection port while reversing the fluid pressure from the starting end of the lining material, and curing the uncured epoxy resin of the lining material, An inner film is peeled, and then the cured lining material is cut at a portion protruding into the main pipe from the main pipe connection port of the branch pipe.   An outer film made of a tubular plastic film having a diameter substantially equal to the inner diameter of the branch pipe is inserted into the branch pipe to be lined from the upstream pipe port to the downstream main pipe connection port, and then the outer film The lining processing method for a branch pipe according to claim 3, wherein a lining material is inserted inside the lining.

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