JPH08258151A - Pipe lining material and pipeline reparing method - Google Patents

Abstract

PURPOSE: To provide a pipe lining material capable of achieving the cost reduction and the enhancement of handling properties by reducing the thickness thereof even with respect to a large caliber pipeline and not extremely narrowing the cross-sectional area of the pipeline after lining. CONSTITUTION: A second pipe lining material 7 obtained by winding a plurality of strip like reinforcing members 6 around the outer peripheral surface of a tubular resin absorbing material 5 in a peripheral direction thereof in a ring form so as to provide a proper interval in the longitudinal direction thereof is incorporated in a first pipe lining material 4 obtained by applying a plastic film 3 high in airtightness to the outer peripheral surface of a tubular resin absorbing material 2 to constitute a pipe lining material 1. Since the pipe lining material 1 is reinforced by the reinforcing member 6, the thickness of the pipe lining material 1 necessary for ensuring necessary strength can be reduced and, especially, in the pipe lining material 1 for the large caliber pipeline, cost reduction and the enhancement of handling properties can be achieved by reducing the thickness of the pipe lining material and the cross-sectional area of a pipeline after lining is not extremely narrowed by the pipe lining material 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining material reinforced by a reinforcing member and a pipe repairing method constructed using the pipe lining material.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is deteriorated, the pipeline is repaired by lining the inner surface of the pipeline without excavating the pipeline from the ground. The pipe repair method is known.

That is, in the above-mentioned pipe repairing method, a pipe lining material made by impregnating a curable resin into a flexible tubular resin absorbent material whose outer peripheral surface is covered with a highly airtight film is piped by fluid pressure. Insert the pipe lining while inverting it, press the pipe lining material against the inner peripheral surface of the pipe, and heat the pipe lining material while maintaining that state to cure the curable resin impregnated in the pipe lining material. This is a construction method in which the inner peripheral surface of the pipeline is lined by doing so.

[0004]

By the way, the required thickness of the pipe lining material used in such a pipe repairing method increases in proportion to the diameter of the pipe, but especially the lining of a pipe having a large diameter. The thickness of the pipe lining material used for the above is very thick, the cost thereof is high, the handleability is poor, and the cross-sectional area of the pipeline after lining is reduced by the pipe lining material.

The present invention has been made in view of the above problems, and a purpose thereof is to reduce the cost and improve the handleability by reducing the thickness even for a pipe having a large diameter. It is possible to provide a pipe lining material that does not extremely narrow the cross-sectional area of the pipe line after lining.

Further, the present invention provides a pipe repairing method capable of easily introducing a pipe lining material for a large diameter into a pipe having a large diameter to repair the pipe. To do.

[0007]

In order to achieve the above object, the invention according to claim 1 is to provide a plurality of belt-shaped reinforcing members on at least the outer peripheral surface of a tubular resin absorbent material in the circumferential direction at appropriate intervals in the longitudinal direction. It is characterized in that it is wound in a ring shape and these are adhered to form a pipe lining material.

According to a second aspect of the present invention, in the first pipe lining material formed by coating the outer peripheral surface of the tubular resin absorbent material with a film having high airtightness, a plurality of tubular resin absorbent materials are provided on at least the outer peripheral surface thereof. The pipe lining material is characterized by incorporating a second pipe lining material obtained by winding the strip-shaped reinforcing member in a ring shape in the circumferential direction at appropriate intervals in the circumferential direction and adhering these.

A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the reinforcing member is formed by molding a glass cloth into a strip shape.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the second pipe lining material is incorporated into the first pipe lining material with both widthwise ends thereof folded. Is characterized by.

According to a fifth aspect of the present invention, a plurality of belt-shaped reinforcing members are wound in a ring shape in the circumferential direction at appropriate intervals on at least the outer peripheral surface of the tubular resin absorbent material, and these are adhered or welded. In a pipeline repair method constructed using a pipe lining material, the pipe lining material attached to the end portion of the start liner by inserting the tubular start liner into the pipeline by fluid pressure inside the pipeline. After that, the tubular open liner is reversed and inserted by fluid pressure into the pipe lining material to press the pipe lining material against the inner peripheral wall of the pipe line, and the pipe lining material is impregnated while keeping this state. It is characterized by hardening the curable resin.

[0012]

According to the invention described in claim 1 or 2, since the strength of the pipe lining material is reinforced by the reinforcing member, the thickness of the pipe lining material required to secure the required strength can be thin, Even for pipe lining materials for large-diameter pipelines, the thickness can be reduced to reduce costs and improve handling, and the cross-sectional area of the pipeline after lining is extremely high depending on the pipe lining material. No more narrowing.

According to the third aspect of the present invention, the reinforcing member is made of glass cloth having a higher tensile strength than the tubular resin absorbent material, so that the strength of the pipe lining material is reinforced and the thickness thereof is reduced. You can

According to the fourth aspect of the present invention, the second pipe lining material (the pipe lining material positioned outside after the reversal) incorporated in the first pipe lining material has its widthwise both ends. Since it is folded, the opening allowance of each folding part of the second pipe lining material when the pipe lining material is inverted in the pipe line is reduced, and each folding part opens smoothly, and therefore the cured pipe lining material No wrinkles are formed on the inner peripheral surface of the pipe, and the state of the inner peripheral surface of the pipe lining material is kept smooth.

According to the fifth aspect of the present invention, the pipe lining material is drawn into the pipe as it is without being inverted, and therefore even if the pipe lining material for a large diameter is used, the pipe lining material with a large diameter is used. It can be easily introduced into the pipe for repairing the pipeline.

[0016]

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

FIG. 1 is a perspective view in which a part of a pipe lining material 1 according to the present invention is cut away. The pipe lining material 1 has a tubular resin absorbent material 2 coated with a highly airtight plastic film 3. A plurality of strip-shaped reinforcing members 6 are wound around the outer peripheral surface of the tubular resin absorbent material 5 in a ring shape in the circumferential direction at appropriate intervals in the first tube lining material 4 formed by The second pipe lining material 7 is formed by folding both ends in the width direction, and the tubular resin absorbent materials 2 and 5 are impregnated with an uncured liquid curable resin.

A method of manufacturing the second pipe lining material 7 will be described with reference to FIGS. 2 to 6. 2 to 4 are perspective views showing a method of manufacturing the second pipe lining material 7 in the order of steps, FIG. 5 is an enlarged detail view of an A portion of FIG. 3, and FIG. 6 is a perspective view of the reinforcing member 6.

In the production of the second pipe lining material 7, as shown in FIG. 2, a plurality of strip-shaped reinforcing members 6 are adhered to the upper surface of the sheet-shaped resin absorbent material 5 in parallel at appropriate intervals in the longitudinal direction. Weld.

As shown in FIG. 6, the strip-shaped reinforcing member 5 is obtained by folding one sheet-shaped glass cloth 6a and incorporating another one of the glass cloth 6b therein, and one end in the width direction thereof is thread 8 It has a three-layer structure by stitching with. Further, as shown in FIG. 1, the length of each reinforcing member 6 is longer than the width dimension of the resin absorbent material 5, and when the reinforcing member 6 is welded to the resin absorbent material 5, one end 6a of the reinforcing member 6 absorbs the resin. The material 5 projects outward from the material 5 by a predetermined length.

The resin absorbent 5 is made of a non-woven fabric such as polyester, nylon, acryl or polypropylene, and the glass cloth constituting the reinforcing member 6 has a higher tensile strength than the resin absorbent 5.

When a plurality of reinforcing members 6 are welded to the upper surface of the sheet-shaped resin absorbent material 5 as described above, the resin absorbent material 5 is folded back so that the upper surface becomes the outer peripheral surface, as shown in FIG. The reinforcing members 6 are rolled into a tubular shape and the widthwise ends thereof are vertically overlapped with each other, as shown in detail in FIG.
The extended portion 6a is bent downward so as to cover the end face in the width direction of the resin absorbent material 5, and the end portion is overlapped and welded to the reinforcing member 6 located on the lower surface of the resin absorbent material 5.

Then, as shown in FIG. 4, finally, the overlapping portion of the widthwise ends of the resin absorbent material 5 is sewn together with the thread 9 to obtain the second pipe lining material 7, and as described above. The second pipe lining material 7 is incorporated into the first pipe lining material 4 in a state where both widthwise ends thereof are folded, and the pipe lining material 1 shown in FIG. 1 is obtained. When the pipe lining material 1 is inverted in the pipe line as described later, the second pipe lining material 7 is located outside, so the diameter of the second pipe lining material 7 is the first pipe. It is larger than the diameter of the lining material 4, and therefore it is necessary to assemble the second pipe lining material 7 in the first pipe lining material 4 in a folded state.

Next, a method of manufacturing the first pipe lining material 4 will be described with reference to FIGS. 7 to 15. 7 to 15 are explanatory views showing the method of manufacturing the first pipe lining 4 in the order of steps thereof, and FIG. 14 is an enlarged detailed view of a portion B in FIG.

In the production of the first pipe lining material 4, the sheet-shaped resin absorbent material 2 shown in FIG. 7 is used. As the resin absorbent material 2, the resin absorbent material of the second pipe lining material 7 is used. The same material as 5 is used, and its surface (lower surface in FIG. 7) is coated with the highly airtight plastic film 3. As the plastic film 3, polyurethane, polyvinyl chloride,
A film of vinylidene, polyethylene, EVA, nylon or the like, or a multilayer film obtained by adhering each film in a multilayer structure is used.

Thus, the sheet-shaped resin absorbent material 2 is
Both end portions in the width direction are bent in the arrow direction (inward direction) shown in FIG. 7 and rounded as shown in FIG. 8, and the end portions are abutted to each other to form a tubular shape.

Next, as shown in FIG. 9, a part of each piece of the two strip-shaped reinforcing members 10 and 11 (outer side) is formed on the back surface of the abutting portion (joint portion) of the resin absorbent material 2 rolled into a tubular shape. After the end portions) are adhered by heat welding, the end portions (free ends) of both the reinforcing members 10 and 11 are butted against each other as shown in FIG.

After that, as shown in FIG. 11, the abutting portions of the resin absorbent materials 10 and 11 are opened upward, and another strip-shaped reinforcing material 12 is incorporated from the opened portion, and as shown in FIG. The material 12 is used as the resin absorbent 2 and the reinforcing materials 10 and 1
1 and the upper surface of the reinforcing material 12 is a resin absorbent material 2
First, the lower surfaces are heat-welded to the reinforcing members 10 and 11, respectively.
The reinforcing materials 10 to 12 are made of the same nonwoven fabric as the resin absorbent material 2.

Next, as shown in FIG. 13, the resin absorbent 2
The strip-shaped tape 13 is adhered to the surface (that is, the plastic tube 3) of the abutting portion (joint portion) of, and another wide tape 14 is covered on the tape 13, and both ends in the width direction are attached to the plastic film 3. To glue. The tapes 13 and 14 are made of the same material as the plastic film 3, but the tape 13 is made up of a two-layer structure of two steps, upper and lower, as shown in detail in FIG. Is composed of a film of the same material as the upper layer 13
b is made of a film or woven fabric of a different type from the lower layer 13a, and both tapes 13 and 14 are kept in a peeled state in which they do not adhere to each other.

Thus, the first pipe lining material 4 shown in FIG. 15 is obtained through the above steps. By incorporating the second pipe lining material 7 in the first pipe lining material 4. The pipe lining material 1 shown in FIG. 1 is constituted.

Pipe lining material 1 constructed as described above
Is used for repairing the pipe line in a state where the resin absorbents 2 and 5 are impregnated with an uncured thermosetting resin, a photocurable resin, or the like. Here, the pipe lining material 1 is used. A method for repairing a pipeline using the above will be outlined with reference to FIGS. 16 to 18.
16 and 17 are cross-sectional views showing the pipeline repairing method, and FIG. 18 is an enlarged detailed view of the C portion of FIG.

In the figure, reference numeral 20 designates a large-diameter pipe line such as a sewer pipe buried in the ground. Inside the pipe line 20, the pipe lining material 1 is reversed from the ground by a fluid pressure, and FIG.
Is inserted in the direction of the arrow.

The pipe line 20 of the pipe lining material 1 is then provided.
When the reversal insertion into the inside is completed, a predetermined internal pressure is maintained in the pipe lining material 1, and the pipe lining material 1 is pressed against the inner wall of the pipe passage 20 as shown in FIG. At this time, the second pipe lining material 7 is located outside the pipe lining material 1, the first pipe lining material 4 is located inside the pipe lining material 1, and is welded to the outer peripheral surface of the tubular resin absorbent material 5 before inversion. The reinforcing member 6 has a second pipe lining material 7 as shown in FIG.
Is located on the inner peripheral surface side and is interposed between the tubular resin absorbents 2 and 5 in a state of being sandwiched between them.

Then, as shown in FIG. 17, the curable resin impregnated in the tubular resin absorbents 2 and 5 is cured while the pipe lining material 1 is kept pressed against the inner wall of the conduit 20. For example, the inner peripheral surface of the pipe 20 has a hardened pipe lining material 1
It is lined and repaired by.

In the above, since the strength of the pipe lining material 1 according to the present embodiment is reinforced by the reinforcing member 6, the thickness of the pipe lining material 1 required to secure the required strength can be small. Even if the pipe 20 has a large diameter as in the example, the thickness of the pipe lining material 1 can be reduced to reduce the cost and improve the handleability, and the pipe 20 can be cut after the lining. The area is not extremely narrowed by the pipe lining material 1.

Further, in the pipe lining material 1 according to the present embodiment, the second pipe lining material (the pipe lining material positioned outside after the reversal) 7 incorporated in the first pipe lining material 4 is Since both ends in the width direction are folded, the opening allowance of each folded portion of the second lining material 7 when the pipe lining material 1 is inverted in the pipe path 20 is reduced,
Each of the folded portions opens smoothly, and therefore wrinkles do not occur on the inner peripheral surface of the cured pipe lining material 1, and the condition of the inner peripheral surface of the pipe lining material 1 is kept smooth.

Next, another embodiment of the pipe line repairing method using the pipe lining material 1 will be described with reference to FIGS. 19 and 20. 19 and 20 are cross-sectional views showing a pipe repairing method according to another embodiment in the order of steps.

In the present embodiment, as shown in FIG. 19, the tubular start liner 15 is inverted and inserted into the conduit 20 by the pressure of the water injected from the water injection hose 16, so that the end of the start liner 15 is terminated. The pipe lining material 1 attached to the section is drawn into the pipe line 20.
The start liner 15 is formed by covering the outer peripheral surface of a tubular woven or non-woven fabric with a highly airtight plastic film.

As described above, the pipe lining material 1 is used as the pipe line 20.
When pulled in, as shown in FIG. 20, the tubular open liner 17 is reversely inserted into the pipe lining material 1 by fluid pressure to press the pipe lining material 1 against the inner peripheral wall of the pipe line 20, Pipe lining material 20
The curable resin impregnated in is cured. Then, pipeline 2
The inner peripheral surface of 0 is lined and repaired by the hardened pipe lining material 1. In the present embodiment, in particular,
Since the pipe lining material 1 is drawn into the conduit 20 as it is without being inverted, even if the pipe lining material 1 is for a large diameter, it can be easily introduced into the large diameter conduit 20. The pipe 20 can be repaired.

In the above embodiment, the pipe lining material 1 is composed of the first pipe lining material 4 and the second pipe lining material 7 in a two-layer structure. However, the second pipe lining material 7 alone is used. You may comprise. However, in this case, it is necessary to cover the outer peripheral surface of the resin absorbent material 5 of the second pipe lining material 7 with a film having high airtightness.

Although the reinforcing member 6 is adhered to the outer peripheral surface of the resin absorbent 5 in the above embodiments, it may be adhered to both the inner peripheral surface and the inner peripheral surface.

[0042]

As is apparent from the above description, claim 1
According to the invention described in 2 or 3, since the strength of the pipe lining material is reinforced by the reinforcing member, the thickness of the pipe lining material required to secure the required strength can be small, especially for large-diameter pipe lines. Even with the pipe lining material, the thickness of the pipe lining material can be reduced to improve cost and handleability, and the cross-sectional area of the pipe line after lining will not be extremely narrowed by the pipe lining material. The effect is obtained.

According to the third aspect of the present invention, the reinforcing member is made of glass cloth having a higher tensile strength than the tubular resin absorbent material to reinforce the strength of the pipe lining material and reduce its thickness. The effect of being able to do is obtained.

According to the fourth aspect of the present invention, the second pipe lining material (the pipe lining material located outside after reversing) incorporated in the first pipe lining material has its widthwise both ends. Since it is folded, the opening allowance of each folding part of the second pipe lining material when the pipe lining material is inverted in the pipe line is reduced, and each folding part opens smoothly, and therefore the cured pipe lining material There is no wrinkle on the inner peripheral surface of the tube, and the effect of keeping the inner peripheral surface of the pipe lining material smooth is obtained.

According to the invention of claim 5, since the pipe lining material is drawn into the pipe as it is without being reversed, even if the pipe lining material for a large diameter is used, the pipe lining material having a large diameter is used. The effect is that it can be easily introduced into the pipe and used for repairing the pipeline.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pipe lining material according to the present invention with a part thereof cut away.

FIG. 2 is a perspective view showing a method of manufacturing a second pipe lining material.

FIG. 3 is a perspective view showing a method for manufacturing a second pipe lining material.

FIG. 4 is a perspective view showing a method of manufacturing a second pipe lining material.

5 is an enlarged detailed view of a portion A of FIG.

FIG. 6 is a perspective view of a reinforcing member.

FIG. 7 is a perspective view of a resin absorbent material showing a method for manufacturing a first pipe lining.

FIG. 8 is a perspective view of a tubular resin absorbent material showing a method for manufacturing a first pipe lining.

FIG. 9 is a cross-sectional view of a joint showing the method for manufacturing the first pipe lining.

FIG. 10 is a cross-sectional view of a joint showing the method for manufacturing the first pipe lining.

FIG. 11 is a cross-sectional view of the joint part showing the method for manufacturing the first pipe lining.

FIG. 12 is a cross-sectional view of a joint showing the method for manufacturing the first pipe lining.

FIG. 13 is a cross-sectional view of a joint showing the method for manufacturing the first pipe lining.

FIG. 14 is an enlarged detailed view of a B part in FIG.

FIG. 15 is a perspective view of a second pipe lining material.

FIG. 16 is a cross-sectional view showing a pipe repairing method.

FIG. 17 is a cross-sectional view showing a pipeline repairing method.

FIG. 18 is an enlarged detail view of a C portion of FIG.

FIG. 19 is a sectional view showing a pipeline repairing method according to another embodiment.

FIG. 20 is a sectional view showing a pipeline repairing method according to another embodiment.

[Explanation of symbols]

 1 Pipe Lining Material 2, 5 Tubular Resin Absorbing Material 3 Plastic Film 4 First Pipe Lining Material 6 Strip Reinforcement Member 7 Second Pipe Lining Material 15 Start Liner 17 Open Liner 20 Pipe Line

Claims (5)

[Claims] 1. A pipe characterized in that a plurality of strip-shaped reinforcing members are wound in a ring shape in the circumferential direction at appropriate intervals in the length direction on at least the outer peripheral surface of a tubular resin absorbent, and these are bonded or welded. Lining material. 2. A plurality of strip-shaped reinforcing members are provided on at least the outer peripheral surface of the tubular resin absorbent material in the first pipe lining material formed by coating the outer peripheral surface of the tubular resin absorbent material with a highly airtight film. A pipe lining material comprising a second pipe lining material, which is formed by winding a ring in a circumferential direction at appropriate intervals in the direction and adhering them together. 3. The pipe lining material according to claim 1, wherein the reinforcing member is formed by molding glass cloth into a strip shape. 4. The pipe lining material according to claim 2, wherein the second pipe lining material is incorporated in the first pipe lining material in a state where both widthwise ends thereof are folded. 5. A pipe lining material obtained by winding a plurality of strip-shaped reinforcing members in a ring shape in the circumferential direction at appropriate intervals in at least the outer peripheral surface of a tubular resin absorbent material and adhering or welding these. In the pipe repair method to be constructed, after pulling the pipe lining material attached to the end of the start liner into the pipe by inserting the tubular start liner into the pipe by fluid pressure,
A tubular open liner is reversed and inserted into the pipe lining material by fluid pressure to press the pipe lining material against the inner peripheral wall of the pipe line, and while maintaining this state, the curable resin impregnated in the pipe lining material is A pipe repair method characterized by hardening.