JP4806835B2 - Pipe lining method and lining pipe - Google Patents

Description

  The present invention relates to a pipe lining method and a lining pipe, and more particularly to a pipe lining method and a lining pipe for repairing an aging pressure pipeline with a resin lining material.

  As a lining method for repairing pressure pipelines such as aging agricultural water pipes, water pipes, industrial water pipes and gas pipes, there is one disclosed in Japanese Patent Application Laid-Open No. 2004-148512. This method uses a lining material in which a tubular resin adsorbent is impregnated with an uncured curable resin. First, one end of the tubular resin adsorbent is folded outward to cure the return portion, and the pipe flange and A tube port sealing member including a flange portion having substantially the same shape is formed. Next, the pipe port sealing member is set in the opening of the pipe line, and the lining material is inverted and inserted into the pipe line through the inside of the pipe port sealing member. Thereafter, the curable resin impregnated in the lining material is cured in a state in which fluid pressure is applied to the inside of the lining material to press the lining material against the inner surface of the pipe line.

  However, in the conventional method, the lining material is pressed against the inner surface of the pipe, the inside of the lining material is heated, the lining material is cured, and then cooled to room temperature. Produce. On the other hand, since the lining material and the pipe seal member are fixed, a phenomenon that the central part of the pipe seal member is drawn into the old pipe due to the shrinkage of the lining material due to thermal deformation occurs, and the central part of the pipe seal member However, when pulled into the aging pipe, the flange portion of the pipe port sealing member is deformed, and a gap is generated between the pipe port sealing member and the flange portion of the aging pipe. And if this flange part and a new flange joint are fastened with a bolt and a nut, a crack will occur in the pipe port sealing member, and there is a problem that the fluid inside leaks out.

JP 2004-148512 A

  An object of the present invention is to provide a pipe lining method and a lining pipe in which liquid leakage does not occur even when the lining material is thermally deformed in the heating and cooling process for thermosetting.

  The pipe lining method of the present invention is a method of constructing a lining material inside a pipe line in which an outer flange portion is integrally formed at an end, and an insertion cylinder part and an insertion cylinder impregnated with an uncured curable resin Using a tube port sealing member made of a hardened flange portion that is bent outward from one end of the portion, the uncured said state with the flange portion facing the outside of the flange portion through a space A tube seal member attaching step of inserting an insertion tube portion into the conduit and attaching the tube seal member to an end of the conduit, and a tubular resin impregnated with an uncured curable resin as the lining material In a state where the lining material is pressed against the inner surface of the pipe line by applying a fluid pressure to the inside of the lining material, the reverse insertion step of inverting and inserting the uncured lining material into the pipe line using the material, Lining material A curing step of curing the fine the insertion tube, characterized in that it and a space embedding step of filling a space filled with a filler to said space.

  The method further includes a step of projecting the lining material outward from the insertion tube portion to form a projecting portion, and attaching an outer peripheral member made of an uncured curable resin impregnated material to the outer periphery of the projecting portion to be cured. Features.

  A liner member made of a tubular flexible sheet is attached to the insertion tube portion, the liner member is disposed between the inner surface of the conduit and the lining material, and the uncured lining material is disposed on the inner surface of the conduit. The liner member is brought into close contact with the inner surface of the conduit when pressed against the pipe.

  A spacer is inserted into a space between the flange portion and the flange portion, and after the curing step, the spacer is removed and the space burying step is performed.

  The space embedding step is characterized in that after the roving impregnated with an uncured curable resin is wound around the outer surface of the insertion cylinder part exposed from the space, the curable resin is cured.

  In the space embedding step, the roving and the fiber composite nonwoven fabric impregnated with an uncured curable resin are alternately wound around the outer surface of the insertion tube portion exposed from the space, and then the curable resin is cured. It is characterized by.

Further, the lining pipe of the present invention is a lining pipe in which a lining material is constructed inside a pipe line in which an outer flange portion is integrally formed at an end, and is impregnated with an uncured curable resin. The insertion cylinder part inserted into the pipe line through the flange part in a state of the above and a flange part that is bent outward from one end of the insertion cylinder part in a cured state and faces the flange part through a space And a lining material that includes a tubular resin material that is impregnated with an uncured curable resin and is reversely inserted into the conduit in an uncured state. The lining material and the insertion tube portion are cured in a state where the uncured lining material is pressed against the inner surface of the pipe line, the space is filled with a filler, and the space is embedded, and the lining material , Said 鍔Protrusion protruding outward are formed than outer peripheral member made of a curable resin impregnant uncured characterized in that it is hardened attached to the outer periphery of the projecting portion.

  In a state where a liner member made of a tubular flexible sheet is attached to the insertion tube portion, the liner member is disposed between the inner surface of the conduit and the lining material, and the liner member is disposed on the inner surface of the conduit. It is closely attached.

  The filler is composed of a roving impregnated with an uncured curable resin, and the curable resin is cured after the roving is wound around the outer surface of the insertion tube portion exposed from the space. It is characterized by that.

  The filler is composed of a roving and a fiber composite nonwoven fabric impregnated with an uncured curable resin, and these are alternately wound around the outer surface of the insertion tube portion where the roving is exposed from the space. The curable resin is cured.

  In the pipe lining method and the lining pipe of the present invention, by providing a space in the buttock of the lip seal member during the construction process, deformation and cracking of the buttock of the lip seal member due to thermal shrinkage of the lining material are eliminated, and the watertight Sex can be secured.

It is the schematic which shows the processing condition of the pipe-port seal member of this invention. It is the schematic of the pipe port sealing member of this invention. It is the schematic which shows the inversion state of the lining material using the tubular net of this invention. It is a figure which shows an old pipeline and a flange part. It is a figure which shows the lining material inversion insertion state after pipe-port seal member installation. It is a figure which shows the hardening condition of a lining material. It is a figure which shows the condition of the inversion reach | attainment end before hardening of a lining material. It is a figure which shows the condition of the inversion start end during hardening of a lining material. It is a figure which shows the condition which winds roving and a strip | belt-shaped mat around a space. It is a figure which shows the condition where the roving to a space and strip | belt-shaped mat winding were completed. It is a figure which shows the connection condition of the old pipeline after lining completion, and a new joint pipe.

  The present invention is a method of constructing a lining material 3 inside an old pipeline 1 (hereinafter also referred to as a pipeline) in which a flange portion 2 that spreads outward is integrally formed at an end portion, and the pipe seal member 4 is attached. It comprises a pipe port seal member attaching step, a reverse insertion step for reversing the lining material 3 and inserting it into the old pipeline 1, a curing step for curing the lining material 3, and a space embedding step for embedding the space 8. The tube port seal member attaching step includes a tube port seal comprising an insertion tube portion 5 impregnated with an uncured curable resin, and a cured heel portion 6 that is continuously bent outward from one end of the insertion tube portion 5. Using the member 4, the uncured insertion tube portion 5 is inserted into the aging pipe 1 with the flange portion 6 facing the outside of the flange portion 2 through the spacer 7, and the port seal member 4 is replaced with the aging pipe. Attach to the end of road 1. In the reverse insertion step, a tubular resin material impregnated with an uncured curable resin is used as the lining material 3, and the uncured lining material 3 is reversely inserted into the pipeline. In the curing step, the lining material 3 and the insertion tube portion are cured in a state where the fluid pressure is applied to the inside of the lining material 3 to press the lining material 3 against the inner surface of the pipe line. In the space embedding process, the space is filled with a filler.

  The present invention is applied to an inside of an old pipeline 1 in which a flange portion 2 that spreads outward is integrally formed at an end, and includes a pipe port sealing member 4 and a lining material 3, and an uncured lining material 3. Is pressed against the inner surface of the aging duct 1, the lining material 3 and the insertion cylinder 5 are cured, the space 8 is filled with the filler, and the space 8 is buried. The pipe opening sealing member 4 includes an insertion tube portion 5 and a flange portion 6. The insertion tube portion 5 is impregnated with an uncured curable resin and passes through the flange portion 2 in an uncured state. Inserted into. The flange portion 6 is continuously provided in a bent shape from one end of the insertion tube portion 5 in a cured state, and is attached to the flange portion 2 via a space 8. The lining material 3 includes a tubular resin material impregnated with an uncured curable resin, and is inverted and inserted into the old pipeline 1 in an uncured state.

  The pipe lining method will be described in detail. First, the tube port sealing member 4 is first manufactured. The tube opening sealing member 4 includes an insertion tube portion 5 and a flange portion 6, and the insertion tube portion 5 is made of a tubular resin material. The tubular resin material is a non-cured thermosetting resin that is formed into a tubular shape by joining both ends of a plastic fiber nonwoven fabric or a belt-shaped nonwoven fabric in which glass fibers are combined with plastic fibers by stitching or bonding. Impregnated with unsaturated polyester resin, epoxy resin or the like. The tubular resin material preferably has a multilayer structure of two or more layers. As shown in FIGS. 1 and 2, one end of the first tubular resin material is cut into a petal shape, and the tip of the petal is set on the mold according to the outer diameter of the collar portion 6. Then, the tubular resin material cut into a petal shape is impregnated with a liquid thermosetting resin, and the doughnut-shaped second resin material 23 cut out according to the size of the buttock is stacked thereon. Further, the second resin material is overlapped with the first resin material and processed in the same manner, so that the pipe seal member 4 having a two-layer structure is produced.

The tube port seal member 4 is cured so that the flange portion 6 has the same size and shape as the flange portion 2 of the aging duct 1, and the tubular resin portion other than the flange portion is left uncured.
In the above embodiment, a two-layer structure is used, but three or more layers may be used. In the case of a multilayer structure, the joint portion of each layer is shifted when processing into a tubular shape.
The liquid thermosetting resin used for forming the collar portion is unsaturated polyester, vinyl ester, epoxy resin or the like, and the same type as the resin used for the lining material is preferable. A hole 6a having the same shape as the bolt hole 2a of the flange portion 2 at the end of the old pipeline 1 is provided in the flange portion 6 of the pipe seal member 4 at the same interval.

  FIG. 3 is a schematic diagram showing the reversal of the lining material using the tubular net of the present invention. Insert the insertion tube portion 5 of the pipe port seal member 4 into the old pipeline 1, and sandwich the spacer 7 between the flange portion 6 of the pipe port seal member 4 and the flange portion 2 (FIG. 4) of the old pipe channel 1. Temporarily fix it with a clamp or the like and temporarily fix it through the bolt hole. In order to protect the lining material 3 from impact pressure or the like after lining, a tubular reinforcing cloth 10 as a liner member is used. The tubular reinforcing cloth 10 is sewn to the tip of the tube port seal member 4 on the reverse start side, and the lining material 3 inverted and inserted therein expands into a tubular shape, thereby covering the entire outer periphery of the lining material 3. At the inverted reaching end where the inverted lining material 3 arrives, the tubular reinforcing cloth 10 is cut along the old pipeline 1, and the insertion tube portion 5 of the port seal member 4 is placed inside the tubular end of the tubular reinforcing cloth 10. It inserts, the edge part of the insertion cylinder part 5 is expanded, and the lining material 3 is reversely inserted inside.

  A tubular net 11 having a short length is inserted into the tubular reinforcing cloth 10 at the end of the tubular reinforcing cloth 10, and one end of the tubular net 11 is joined to the tubular reinforcing cloth 10 by stitching or adhesion. The pipe port sealing member 4 is joined to the other end opposite to one end of the tubular reinforcing cloth 10 to which the tubular net 11 is joined, and the tubular reinforcing cloth 10 is provided over the entire length of the old pipeline 1. At this time, the end portion of the tubular reinforcing cloth 10 joined to the insertion tube portion 5 of the pipe port sealing member 4 is disposed at the inverting material 3 reversal start end, and the tubular net 11 is disposed at the reversal reaching end of the lining material 3. The joined ends are arranged.

  A tubular reinforcing cloth 10 is disposed outside the insertion tube portion 5 of the tube port seal member 4, and the tubular net 11 is disposed inside the insertion tube portion 5. The lining material 3 that reversely advances inside the tubular reinforcing fabric 10 reverses inside the tubular net 11 when it reaches the joint with the tubular net 11 inside the tubular reinforcing fabric 10. It progresses while expanding the cylindrical part 5 into a cylindrical shape. The tubular net 11 is made of a member in which resin fiber, glass fiber roving, carbon fiber roving, or the like is knitted in a net shape, and is processed into a tubular shape by fixing both ends of the belt-shaped material with an adhesive or the like.

  The lining material 3 is manufactured by impregnating a tubular resin material with a liquid thermosetting resin. The tubular resin material is usually composed of a non-woven fabric of polyester fiber, but the tubular resin material composed of a non-woven fabric in which glass fibers are combined with polyester fibers is suitable for the present invention because of its small thermal shrinkage. It is optimal for the construction method. As the thermosetting resin impregnated in the tubular resin material, unsaturated polyester, vinyl ester, epoxy, or the like is used. As described above, the flange portion 6 of the pipe port sealing member 4 is temporarily fixed by a fastener by inserting the spacer 7 between the flange portions 2 at both ends of the old pipeline 1. The tubular reinforcing fabric 10 is a member obtained by processing a woven fabric of polyester, polypropylene, polyethylene, or the like into a tubular shape by stitching, and is used when the internal pressure of the old pipeline 1 to be repaired is high. Absent.

FIG. 5 is a diagram showing the lining material reverse insertion state after installation of the pipe port seal member, FIG. 6 is a diagram showing the curing state of the lining material, and FIG. 7 is the reverse reaching end before the lining material is cured. FIG. 8 is a diagram showing the situation of the reverse starting end during the curing of the lining material. A tubular reinforcing fabric 10 having an insertion tube portion 5 of the tube port seal member 4 joined to one end and a tubular net 11 joined to the other end is disposed in the old pipeline 1. The lining material 3 is inverted and inserted into the inside of the machine.
When the reverse insertion is completed, the inside of the lining material 3 is pressurized to bring the tubular reinforcing cloth 10 and the lining material 3 into close contact with the wall surface of the old pipeline 1, and the inside of the lining material 3 is pressurized with warm water or the like. Harden. When the hardening of the lining material 3 is completed, the spacer 7 inserted between the flange portion 6 of the pipe port seal member 4 and the flange portion 2 of the old pipeline 1 is removed.

  The lining material 3 that is in a high temperature state even after curing is thermally shrunk with cooling, but the collar part 6 of the pipe port seal member 4 is also contracted, and the distortion is caused by the collar part 6 and the flange part of the old pipeline 1. The space 8 between the two is creased. The magnitude of the shrinkage increases as the length of the lining material 3 increases. Therefore, the size of the space is calculated in advance from the length of the aging pipe 1 in consideration of the expansion rate of the lining material 3. When the thermal contraction of the lining material is completed, the space 8 between the flange portion 6 where the shrinkage strain is reduced and the flange portion 2 of the old pipeline 1 is impregnated with epoxy resin on the outer periphery of the insertion tube portion 5 at the bottom of the space 8. The filler 14 such as the glass fiber roving 14a or the belt-like felt 14b is wound to fill the entire space 8. At this time, in addition to the glass fiber roving, a glass fiber composite polyester felt may be processed into a belt shape and wound alternately with the glass fiber roving. After the wound glass fiber roving is cured, a bolt hole is drilled in the flange portion 2.

  The end portion of the cured lining material 3 is cut so that the tube port cover material 12 provided in advance on the inner peripheral portion of the flange portion 6 is removed and the lining material 3 protrudes slightly from the flange portion 6. Thereafter, a fiber roving impregnated with an epoxy resin as the outer peripheral member 21 is wound around the outer periphery of the protruding lining material 3 and cured. The winding thickness is set so as not to exceed the thickness of the insertion tube portion 5 of the tube port seal member 4. When the processing of the end portion of the lined old pipeline 1 is completed, a flange of another new joint pipe 13 having an adjusted outer diameter of the flange is installed at the end portion and fastened with a bolt and a nut.

  FIG. 9 is a diagram illustrating a situation where the roving 14a and the belt-like felt 14b as the filler 14 are wound around the space, and FIG. 10 is a diagram illustrating a situation where the roving and the belt-like mat winding around the space are completed. In the pipe lining method and the lining pipe of the present invention, by providing the space 8 in the flange portion 6 of the pipe port sealing member 4 in the construction process, the flange portion 6 moves between the spaces 8 even if the lining material 3 is thermally contracted. Therefore, deformation and cracking can be eliminated, water tightness can be secured, and the problems of conventional methods can be solved. In the present embodiment, the spacer 7 is attached and the thermosetting resin is cured, but the spacer 7 is not necessarily used, and any method may be adopted as long as an appropriate space can be secured.

  Since the lining material 3 is thermally contracted by cooling after thermosetting, a detachable spacer 7 is provided between the flange portion 6 of the pipe seal member 4 affected by the lining material 3 to provide a space 8. The spacer 7 is fixed with bolts so that it does not stretch or deform until curing and cooling are completed. By making the spacer 7 detachable, the spacer 7 can be removed when the lining material 3 is cured and thermal contraction starts. That is, while the lining material 3 is cured, the collar portion 6 is fixed at an arbitrary position, and when the lining material 3 is cured and the shape is determined, the lining material 3 is stretched or deformed in the space portion. Has the effect of absorbing.

  A space 8 provided between the flange portion 2 of the aging pipe line 1 and the flange portion 6 of the pipe port seal member 4 is set on the safety side in consideration of heat shrinkage of the lining material 3. For this reason, at the time when the thermal shrinkage of the lining material 3 is completed, the shrinkage residue is generated and the space is not completely lost. Moreover, the extent of this remaining space varies depending on the shrinkage level of the lining material. If the space generated here is not completely filled by any method, the flange portion 6 may break when the flange is tightened with bolts and nuts. Therefore, a glass fiber roving or belt-like felt is impregnated with a liquid epoxy resin and wound around the outer periphery of the hardened insertion cylinder 5 which is the bottom of the space to completely fill the irregularly generated space residue. .

Since the filler 14 in which the glass fiber roving or belt felt is impregnated with a liquid epoxy resin is cured, the characteristics after curing are equal to the characteristics of the flange 6 and the tightening strength transmission by the bolts and nuts is also good. No cracks occur in 6.
Glass fiber roving or belt-like felt has flexible properties, so it can be easily changed in shape, and is optimal as a filler for spaces generated in irregular sizes.

  FIG. 11 is a diagram illustrating a connection state between the old pipeline and the new joint pipe after completion of the lining. At the end portion of the lining material 3 where the insertion tube portion 5 and the lining material 3 are overlapped and hardened, the plate thickness after hardening becomes thick, so that an inner diameter difference occurs between the insertion tube portion 5 and the new joint pipe 13. Further, when the lining material 3 is cut so as to coincide with the tip portion of the portion protruding from the flange portion 6 and connected to the new joint pipe 13, a step due to the inner diameter difference occurs at the connection portion, and the flow of fluid after construction is inhibited. Cause. On the other hand, in the present embodiment, the lining material 3 is slightly protruded from the flange portion 6 and cut, and the inner surface of the protruding portion is cut obliquely so as to eliminate the step so as to be an inclined surface, so that the fluid flow is not hindered. did. The inner diameter difference between the lining material 3 and the new joint pipe 13 becomes the thickness of the insertion tube portion 5 and a gap is generated. In this embodiment, an outer peripheral member 21 made of roving glass fiber or carbon fiber impregnated with epoxy resin is wound to fill the inner diameter difference (FIG. 11).

  End treatment in consideration of thermal shrinkage of the above lining material ensures water tightness between the old pipeline and the new joint, and enables lining construction that allows smooth flow at the connection. be able to. The present invention is not limited to the above embodiments, and various modifications can be made. For example, you may construct without attaching the tubular reinforcement cloth (liner member) 10 to the insertion cylinder part 5 of the pipe-port seal member 4.

DESCRIPTION OF SYMBOLS 1 Old pipe 2 Flange part 2a, 6a Bolt hole 3 Lining material 4 Pipe port sealing member 5 Insertion cylinder part 6 Gutter part 7 Spacer 8 Space 10 Tubular reinforcement cloth 11 Tubular net 12 Pipe port cover material 13 New joint pipe 14 Filling material 14a Glass fiber roving 14b Belt-like felt 21 Outer peripheral member 23 Second resin material

Claims (10)

In the method of constructing the lining material inside the pipe line in which the flange part spreading outward is integrally formed at the end part,
Using a tube opening sealing member comprising an insertion cylinder part impregnated with an uncured curable resin and a cured flange part that is bent outward from one end of the insertion cylinder part, and the flange part is connected to the flange A port seal member mounting step of inserting the uncured insertion tube portion into the pipe line and facing the pipe port seal member to an end portion of the pipe line with the space facing the outside of the section; ,
Using a tubular resin material impregnated with an uncured curable resin as the lining material, a reversing insertion step of reversing and inserting the uncured lining material into the pipeline,
A curing step of curing the lining material and the insertion tube portion in a state in which fluid pressure is applied to the inside of the lining material to press the lining material against the inner surface of the conduit;
A space burying step of filling the space with a filler to fill the space;
A pipe lining method characterized by comprising: The method further includes a step of projecting the lining material outward from the insertion tube portion to form a projecting portion, and attaching an outer peripheral member made of an uncured curable resin impregnated material to the outer periphery of the projecting portion to be cured. 2. The pipe lining method according to claim 1, wherein the pipe lining method is used. A liner member made of a tubular flexible sheet is attached to the insertion tube portion, the liner member is disposed between the inner surface of the conduit and the lining material, and the uncured lining material is disposed on the inner surface of the conduit. The pipe lining method according to claim 1 or 2, wherein the liner member is brought into close contact with the inner surface of the pipe line when pressed against the pipe. The pipe lining according to claim 1 or 2, wherein a spacer is inserted into a space between the flange portion and the flange portion, and after the hardening step, the spacer is removed and the space burying step is performed. Construction method. The space embedding step is characterized in that the curable resin is cured after winding a roving impregnated with an uncured curable resin around the outer surface of the insertion tube portion exposed from the space. The pipe lining method according to any one of 1 to 3. In the space embedding step, the roving and the fiber composite nonwoven fabric impregnated with an uncured curable resin are alternately wound around the outer surface of the insertion tube portion exposed from the space, and then the curable resin is cured. The pipe lining method according to any one of claims 1 to 3. It is a lining pipe in which a lining material is constructed inside a pipe line in which an outer flange portion is integrally formed at the end,
An insertion tube portion that is impregnated with an uncured curable resin and is inserted into the pipe line through the flange portion in an uncured state, and is continuously provided in a bent shape from one end of the insertion tube portion in a cured state. A port seal member attached to an end portion of the pipeline including a flange portion facing the flange portion through a space;
Including a tubular resin material impregnated with an uncured curable resin, and a lining material that is inverted and inserted into the pipe line in an uncured state,
The lining material and the insertion tube portion are cured in a state where the uncured lining material is pressed against the inner surface of the pipeline, the space is filled with a filler, and the space is embedded.
The lining material has a protruding portion that protrudes outward from the flange portion, and an outer peripheral member made of an uncured curable resin-impregnated material is attached to the outer periphery of the protruding portion and cured. Lining tube to be used. In a state where a liner member made of a tubular flexible sheet is attached to the insertion tube portion, the liner member is disposed between the inner surface of the conduit and the lining material, and the liner member is disposed on the inner surface of the conduit. The lining pipe according to claim 7 , wherein the lining pipe is closely attached. The filler is composed of a roving impregnated with an uncured curable resin, and the curable resin is cured after the roving is wound around the outer surface of the insertion tube portion exposed from the space. The lining pipe according to claim 7 . The filler is composed of a roving and a fiber composite nonwoven fabric impregnated with an uncured curable resin, and these are alternately wound around the outer surface of the insertion tube portion where the roving is exposed from the space. The lining pipe according to claim 7, wherein the curable resin is cured.

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