JPH07205287A - Pipe lining material and production thereof - Google Patents

Abstract

PURPOSE:To obtain a pipe lining material generating no wrinkles even in the bent pipe of a pipeline. CONSTITUTION:Ring shaped reinforcing materials 4 hard to extend in the peripheral direction thereof but easy to extend in the lateral direction thereof are bonded to the inner peripheral surface of a pipe lining material constituted by impregnating a tubular nonwoven fabric 3 of which the outer peripheral surface is covered with a plastic film high in aritightness with a curable resin at a proper pitch. After the ring-shaped reinforcing materials 4 are bonded to one surface of a strip like nonwoven fabric almost parallelly at a proper pitch, the strip like nonwoven fabric is molded into a tubular form so that the reinforcing materials 4 are positioned on the side of the inner peripheral surface side of the nonwoven fabric to form the tubular nonwoven fabric 3 and the outer peripheral surface of the tubular nonwoven fabric 3 is impregnated with a curable resin to produce the pipe lining material 1. The purpose is achieved because the pipe lining material is hard to extend in its peripheral direction but easy to extend in its lateral direction.

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 used for repairing a curved pipe line and a method for producing the same.

[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 pipe repairing method, a pipe lining material formed by impregnating a curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a highly airtight film is inserted into the pipe while being inverted by fluid pressure. After that, while the pipe lining material is being pressed against the inner peripheral surface of the pipeline, the pipe lining material is heated to cure the curable resin impregnated therein, thereby lining the inner peripheral surface of the pipeline. Is a construction method.

[0004]

However, since the conventional pipe lining material used for the above-mentioned pipe repairing method stretches substantially equally in the circumferential direction and the length direction, and the amount of the stretch is small, the pipe having the bent portion is not provided. In the passage, there is a problem that a wrinkle of the pipe lining material occurs in the inner portion of the bent portion, and this wrinkle becomes a resistance of the fluid flowing in the pipe passage.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pipe lining material in which wrinkles do not occur even in a bent portion of a pipe and a method for manufacturing the pipe lining material.

[0006]

In order to achieve the above object, the first invention is a pipe lining material constituted by impregnating a curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a highly airtight film, A ring-shaped reinforcing material that does not easily extend in the circumferential direction and easily extends in the width direction is bonded to the inner peripheral surface of the tubular nonwoven fabric at an appropriate pitch in the length direction.
Then, as a method for producing this pipe lining material, after one side of the strip-shaped nonwoven fabric, a ribbon-shaped reinforcing material that is difficult to extend in the circumferential direction and easy to extend in the width direction is adhered substantially parallel to the length direction at an appropriate pitch. The tubular non-woven fabric is formed into a tubular form so that the reinforcing material is located on the inner peripheral surface side, and the outer peripheral surface of the tubular non-woven fabric is coated with a highly airtight film,
The tubular non-woven fabric is characterized by being impregnated with a curable resin.

A second aspect of the present invention is a pipe lining material which is formed by impregnating a curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a highly airtight film. It is characterized in that a reinforcing material that is hard to stretch and easily stretches in the width direction is bonded in a spiral shape. Then, as a method of manufacturing this pipe lining material, the outer peripheral surface is inverted the tubular nonwoven fabric coated with a film having high airtightness, and the outer peripheral surface of the inverted tubular nonwoven fabric is difficult to extend in the circumferential direction and is easily extended in the width direction. The present invention is characterized in that a ribbon-shaped reinforcing material is spirally wound and adhered thereto, and then the tubular non-woven fabric is inverted again to impregnate a curable resin therein.

A third aspect of the invention has a double tube structure in which a tubular non-woven fabric whose outer peripheral surface is covered with a film having high airtightness is an outer layer and another tubular non-woven fabric having a plurality of cuts in the circumferential direction is an inner layer. The tubular lining material is formed by impregnating both tubular non-woven fabrics with a curable resin. Then, as a method for producing this pipe lining material, in a tubular nonwoven fabric having a plurality of cuts in the circumferential direction, the tubular nonwoven fabric whose outer peripheral surface is covered with a highly airtight film is invertedly inserted, and then both tubular nonwoven fabrics are integrated. It is characterized in that it is inverted and impregnated with a curable resin.

[0009]

The pipe lining material according to the present invention is difficult to extend in the circumferential direction and easily extends in the length direction. Therefore, the pipe lining is formed at the outer portion (the portion having a large radius of curvature and the long circumferential length) of the curved portion of the pipe line. The material extends in the lengthwise direction by the required amount, and the tube lining material hardly expands in the inner portion of the bent portion of the conduit.
Therefore, wrinkles do not occur in the pipe lining material in the inner portion of the bent portion of the pipe, the fluid flowing in the pipe is not subjected to a large resistance, and the fluid smoothly flows in the pipe including the bent portion. .

[0010]

【Example】

[First Invention] An embodiment of the first invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partial perspective view of a pipe lining material 1 according to the first invention. The pipe lining material 1 has an inner peripheral surface of a tubular nonwoven fabric 3 whose outer peripheral surface is covered with a highly airtight plastic film 2. In addition, a ring-shaped reinforcing material 4 which is hard to extend in the circumferential direction and easy to extend in the width direction is adhered over the entire circumference, and the reinforcing material 4 is arranged at an appropriate pitch in the length direction and cured into the tubular nonwoven fabric 3. It is configured to be impregnated with a resin. still,
In FIG. 1, 7 is a ribbon tape-shaped non-woven fabric for covering the seams of the tubular non-woven fabric 3, which is covered with the plastic film 2.

The pipe lining material 1 is shown in FIG.
It is manufactured according to the procedure shown in (a) to (c).

That is, as shown in FIG. 2 (a), the ribbon-shaped reinforcing material 4 is adhered to one surface (the upper surface in the illustrated example) of the strip-shaped nonwoven fabric 3'for a long time in the width direction, and After a plurality of replenishment materials 4 are adhered to each other substantially in parallel in the longitudinal direction at an appropriate pitch, the strip-shaped nonwoven fabric 3'is placed so that the reinforcing material 4 is located on the inner peripheral surface side as shown in FIG. 2 (b). The end portions in the width direction are butted to each other, and the butted portions are sewn together, and the ribbon tape-shaped non-woven fabric 7 is bonded to the seams.
The tubular nonwoven fabric 3 shown in (c) is obtained.

When the tubular non-woven fabric 3 is obtained as described above, the outer peripheral surface of the tubular non-woven fabric 3 is covered with the plastic film 2, and finally the tubular non-woven fabric 3 is cured with a curable resin (thermosetting resin,
The pipe lining material 1 shown in FIG. 1 is obtained by impregnating it with a photocurable resin or the like.

Now, a pipe line repairing method using the pipe lining material 1 according to the present invention will be described with reference to FIGS. 3 and 4. 3 and 4 are cross-sectional views showing the pipeline repairing method.

In FIG. 3, reference numeral 5 denotes a pipe line having a bent portion. Inside the pipe line 5, as shown in FIG. 3, the pipe lining material 1 according to the present invention is fluid pressure (for example, air pressure). )
Is reversed and inserted.

Since the reinforcing material 4 that is hard to expand in the circumferential direction and easy to expand in the width direction is bonded to the inner peripheral surface of the pipe lining material 1 according to the present invention, the entire pipe lining material 1 is formed. As a result, the pipe lining material is not easily stretched in the circumferential direction but is easily stretched in the longitudinal direction. Therefore, as shown in FIG. 4, the pipe lining material is formed on the outer side portion (the portion having a large radius of curvature and the long circumferential length) 5a. 1 extends in the lengthwise direction by the required amount, and pipeline 5
In the inner portion 5b of the bent portion, the pipe lining material 1 hardly extends in the length direction.

As a result of the above, wrinkles do not occur in the pipe lining material 1 at the inner portion 5b of the bent portion of the pipe 5, the fluid flowing through the pipe 5 does not receive a large resistance, and the fluid including the bent portion Smoothly flowing in the pipe line 5. [Second Invention] Next, an embodiment of the second invention will be described with reference to the accompanying drawings.

FIG. 5 shows a pipe lining material 11 according to the second invention.
FIG. 3 is a partial perspective view of a tubular lining material 11 on the inner peripheral surface of a tubular non-woven fabric 13 whose outer peripheral surface is covered with a highly airtight plastic film 12, which is difficult to stretch in the circumferential direction and easily stretch in the width direction. The reinforcing material 14 is spirally wound and adhered thereto, and then the reinforcing material 14 is arranged at an appropriate pitch in the length direction, and the tubular nonwoven fabric 13 is impregnated with a curable resin. In FIG. 5, reference numeral 17 is a ribbon tape-shaped non-woven fabric for hiding the seams of the tubular non-woven fabric 13, which is covered with the plastic film 12.

The pipe lining material 11 is shown in FIG.
It is manufactured according to the procedure shown in (a) to (c).

That is, as shown in FIG. 6A, a tubular non-woven fabric 13 whose seams are hidden by a non-woven fabric 17 and the outer peripheral surface of which is previously covered with the plastic film 12 is used, for example, by a known inversion method using fluid pressure. By inverting (turning over) the plastic film 12 on the inner peripheral surface side and the non-woven fabric 13 on the outer peripheral surface side, and as shown in FIG.
Wrap it in a spiral and glue it.

Then, as shown in FIG. 6 (c), when the adhesion of the reinforcing material 14 to the outer peripheral surface of the tubular nonwoven fabric 13 is completed,
When the tubular nonwoven fabric 13 is turned over again so that the plastic film 12 is located on the outer peripheral surface side and the reinforcing material 14 is located on the inner peripheral surface side, and finally the tubular nonwoven fabric 13 is impregnated with the curable resin, the tube shown in FIG. The lining material 11 is obtained.

Thus, the pipe lining material 11 according to the present invention.
Since the reinforcing material 14 which is hard to extend in the circumferential direction and easy to extend in the width direction is spirally wound and adhered to the inner peripheral surface of the pipe lining material 11, the pipe lining material 11 as a whole is difficult to extend in the circumferential direction and has a length. Therefore, even if the pipe line having the bend is repaired by using the pipe lining material 11 according to the present invention, the same effect as that of the first invention can be obtained. [Third Invention] Next, an embodiment of the third invention will be described with reference to the accompanying drawings.

FIG. 7 shows a pipe lining material 21 according to the third invention.
FIG. 3 is a partial perspective view of the tubular lining material 21, the seams of which are hidden by a ribbon tape-shaped non-woven fabric 27, and the outer peripheral surface of which is a tubular non-woven fabric 23 pre-coated with a highly airtight plastic film 22. Multiple breaks in the direction 2
It has a double tube structure having another tubular non-woven fabric 33 containing 6 as an inner layer, and is configured by impregnating both tubular non-woven fabrics 23 and 33 with a curable resin.

Here, the pipe lining material 21 according to the present invention is used.
The manufacturing method will be described with reference to FIG.

As shown in FIGS. 8 (a) and 8 (b), in the tubular non-woven fabric 33 having a plurality of cuts 26 in the circumferential direction,
After the tubular non-woven fabric 23 whose outer peripheral surface is covered with the plastic film 22 is inverted and inserted by fluid pressure (for example, air pressure), as shown in FIG.
The pipe lining material 21 shown in FIG. 7 is obtained by reversing the 3, 33 integrally by fluid pressure (for example, air pressure) and finally impregnating both the tubular nonwoven fabrics 23, 33 with the curable resin.

Thus, the pipe lining material 21 according to the present invention
Is composed of a tubular non-woven fabric 33 having a plurality of cuts 26 in the circumferential direction.
Therefore, the pipe lining material 21 as a whole is difficult to extend in the circumferential direction and easily extends in the length direction, and therefore the pipe lining material 21 according to the present invention. The same effect as that of the first aspect of the invention can be obtained by repairing a curved conduit by using.

[0028]

As is apparent from the above description, according to the present invention, since the pipe lining material is hard to stretch in the circumferential direction and easily stretches in the length direction, the outer portion (the radius of curvature of the curved portion of the pipe line is The pipe lining material extends in the longitudinal direction by the required amount in the large and long circumference portion), and the pipe lining material hardly expands in the inner portion of the bend portion of the pipeline, and therefore, the bend portion of the pipeline portion There is no wrinkle in the pipe lining material in the inner portion, the fluid flowing through the pipe is not subjected to a large resistance, and the fluid can smoothly flow in the pipe including the bent portion.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a pipe lining material according to a first invention.

FIG. 2 is an explanatory view showing the method of manufacturing a pipe lining material according to the first invention in accordance with the procedure thereof.

FIG. 3 is a cross-sectional view showing a pipe line repairing method using the pipe lining material according to the first invention.

FIG. 4 is a cross-sectional view showing a pipe repairing method using the pipe lining material according to the first invention.

FIG. 5 is a partial perspective view of a pipe lining material according to a second invention.

FIG. 6 is an explanatory view showing a method of manufacturing a pipe lining material according to a second invention in accordance with the procedure.

FIG. 7 is a partial perspective view of a pipe lining material according to a third invention.

FIG. 8 is an explanatory view showing the method of manufacturing a pipe lining material according to the third invention in accordance with the procedure thereof.

[Explanation of symbols]

 1,11,21 Pipe lining material 2,12,22 Plastic film 3,13,23,33 Tubular non-woven fabric 4,14 Reinforcement material 26 Cut

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Claims (6)

[Claims] 1. A pipe lining material constituted by impregnating a curable resin into a tubular non-woven fabric having an outer peripheral surface covered with a film having high airtightness, wherein the inner peripheral surface of the tubular non-woven fabric comprises:
A pipe lining material, characterized in that a ring-shaped reinforcing material that is difficult to stretch in the circumferential direction and easy to stretch in the width direction is bonded at an appropriate pitch in the length direction. 2. A tubular lining material constituted by impregnating a curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a film having high airtightness, wherein the inner peripheral surface of the tubular non-woven fabric comprises:
A pipe lining material, which is formed by spirally adhering a reinforcing material that does not easily expand in the circumferential direction and easily expands in the width direction. 3. A double-tube structure having a tubular non-woven fabric whose outer peripheral surface is covered with a film having high airtightness as an outer layer, and another tubular non-woven fabric having a plurality of cuts in the circumferential direction as an inner layer, and having a double tubular structure. A pipe lining material comprising a non-woven fabric impregnated with a curable resin. 4. A strip-shaped nonwoven fabric is adhered to one surface of the strip-shaped nonwoven fabric in a substantially pitch-wise manner in a circumferential direction and a ribbon-like reinforcing material that is easily stretched in the width direction, at a proper pitch, and then the strip-shaped nonwoven fabric is reinforced. Characterized in that the material is formed into a tubular shape so that it is located on the inner peripheral surface side to form a tubular non-woven fabric, and the outer peripheral surface of the tubular non-woven fabric is covered with a highly airtight film, and then the tubular non-woven fabric is impregnated with a curable resin. A method for manufacturing a pipe lining material. 5. A tubular non-woven fabric having an outer peripheral surface coated with a film having high airtightness is inverted, and a ribbon-shaped reinforcing material that is difficult to stretch in the circumferential direction and easily stretches in the width direction is provided on the outer circumferential surface of the inverted tubular non-woven fabric. A method for producing a pipe lining material, which comprises spirally winding and adhering the spiral wound non-woven fabric, and then reversing the tubular non-woven fabric to impregnate a curable resin therein. 6. A tubular non-woven fabric having an outer peripheral surface covered with a film having high airtightness is inverted and inserted into a tubular non-woven fabric having a plurality of cuts in the circumferential direction, and then both tubular non-woven fabrics are integrally inverted, A method for producing a pipe lining material, characterized in that a curable resin is impregnated inside.