JPH10323897A - Manufacture of pipe lining material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a pipe lining material for manufacturing easily and with good workability the pipe lining material of multi-layer structure. SOLUTION: An inner layer 2 is inserted into a tubular inversion guide liner 3 of high airtightness, and an inversion guide liner 3 and the inner layer 2 are inversion inserted into a surface layer 1 by applying the fluid pressure to the inversion guide liner 3, and then respective tubular resin absorbent materials 1A and 2A of the surface layer 1 and the inner layer 2 are impregnated with curing resin to manufacture a pipe lining material. The surface layer 1 and the inner layer 2 are manufactured respectively and individually by the arrangement, and respective manufactures are carried out with good workability, and among other things, a plastic film 1B coating the outer surface of the surface layer 1 is not marked. Also the inner layer 2 is inserted smoothly into the surface layer 1 to overlap easily the surface layer 1 with the inner layer 2 and form a multi-layer structure, and the pipe lining material of the multi- layer structure of the desired plate thickness can be manufactured easily and with good workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pipe lining material used for repairing a pipeline.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, a pipe lining for repairing the pipeline by lining the inner peripheral surface thereof without excavating the pipeline. A construction method has been proposed and is already in practical use. This pipe lining method inserts a pipe lining material made by impregnating a curable resin into a tubular resin adsorbent whose outer surface is coated with a highly airtight plastic film, while turning it into the pipe line by inverting it with fluid pressure, The pipe lining material is pressed against the inner peripheral surface of the pipe line, and while maintaining that state, the pipe lining material is heated or the like to cure the curable resin impregnated in the pipe lining material. This is a method of repairing the pipeline by lining the inner peripheral surface of the pipeline.

By the way, in such a pipe lining method, the pipe lining material after hardening is taken into consideration in consideration of the aging degree and burial depth of the pipe, the effect of a live load received from an automobile or a railway vehicle, the internal pressure of the pipe, and the like. Its thickness is designed to ensure the required strength.

[0004] Nonwoven fabric is generally used as the tubular resin adsorbent constituting the pipe lining material, and the thickness of the pipe lining material is adjusted solely by adjusting the thickness of the nonwoven fabric. Since the maximum thickness of the non-woven fabric is limited to 20 to 45 m / m for manufacturing reasons, when a greater thickness is required for the pipe lining material, the non-woven fabric is laminated in two or more layers to form a multilayer structure. The thickness required for the pipe lining material is ensured.

For example, when the pipe lining is made of a two-layer tubular resin adsorbent to secure the required thickness of the pipe lining material, first, the resin adsorbent made of a band-shaped nonwoven fabric is rolled, and both ends thereof are formed. To form a first layer of the tubular resin adsorbent, and another belt-shaped resin adsorbent is rolled up so as to wrap the first layer of the tubular resin adsorbent from the outside, and both ends thereof are joined. A method has been adopted in which a two-layer tubular resin adsorbent is formed, and an outer surface of the inner and outer two-layer tubular resin adsorbent is coated with a plastic film to produce a pipe lining material having a desired plate thickness.

[0006]

By the way, in a pipe lining material having a multilayer structure, since the innermost tubular resin adsorbent is located at the outermost layer after inversion, the diameter of the innermost tubular resin adsorbent is reduced. In the manufacture of the largest, and thus tube lining, the innermost tubular resin adsorbent with the largest diameter is incorporated into the smaller diameter tubular resin adsorbent.

In the production of a pipe lining material having a multilayer structure with a large diameter (for example, φ500 m / m or more) under the above circumstances, the outer surface of the outermost tubular resin adsorbent is coated with a plastic film. It was difficult to perform airtight processing. The reason for this is that the innermost tubular resin adsorbent with a large diameter is partly folded and housed in a smaller diameter tubular resin adsorbent. This is because irregularities are generated on the outer surface, and the outermost layer of the tubular resin adsorbent is locally extended, and wrinkles are generated on the outer surface thereof.

Further, particularly in the production of a large-diameter and thick-walled pipe lining material, it is very difficult to correct the deviation of the large and heavy pipe lining material from the processing line, and the handling of the pipe lining material during handling is difficult. The plastic film on the outer surface was often scratched.

Further, it is also difficult to wind a band-shaped resin absorbent around the first layer of the resin absorbent formed into a tubular shape and to overlap the resin absorbent of the second and subsequent layers, which requires a great deal of labor and labor. It took time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a method for manufacturing a pipe lining material capable of easily manufacturing a multi-layered pipe lining material with good workability. It is in.

[0011]

In order to achieve the above object, the invention according to claim 1 has another aspect in which an outer surface of a tubular resin adsorbent is coated with a highly airtight plastic film inside a surface layer. Providing an inner layer made of a tubular resin adsorbent,
As a method for producing a tube lining material constituted by impregnating a curable resin into both tubular resin adsorbents, the inner layer is inserted into a highly airtight tubular reverse guide liner, and fluid pressure is applied to the reverse guide liner. After the reverse guide liner and the inner layer are reversely inserted into the surface layer by acting, the reverse guide liner is removed from the inner layer, and the respective tubular resin absorbents of the surface layer and the inner layer are impregnated with the curable resin. The method was adopted.

According to a second aspect of the present invention, in the first aspect of the present invention, after the reverse guide liner and the inner layer are invertedly inserted into the surface layer, or each of the tubular resin absorbent members of the surface layer and the inner layer. After impregnating with a curable resin, the reverse guide liner is extracted from the inner layer while applying an internal pressure to the reverse guide liner.

According to a third aspect of the present invention, in the first aspect of the present invention, the plastic film is composed of a composite film of three types and five layers having a nylon film layer.

According to a fourth aspect of the present invention, in the first or the third aspect of the present invention, the plastic film is brought into close contact with the outer surface of the tubular resin adsorbent of the surface layer by a decompression method so as to be thermally welded. It is characterized by.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the reversing guide liner is formed by covering the outer surface of a tubular woven fabric with a highly airtight plastic film or rubber. .

According to a sixth aspect of the present invention, in the first or fifth aspect of the present invention, one end of a pull-back rope is attached to the inversion end of the inversion guide liner.

According to a seventh aspect of the present invention, in the first aspect of the invention, after the reverse guide liner is removed from the inner layer, one end of each of the surface layer and the inner layer is fixed with bolts, nuts and washers. It is characterized by sealing with an end cover, and covering bolts, nuts and washers with a cover.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the inner layer is formed of a tubular resin adsorbent having a multilayer structure.

According to a ninth aspect of the present invention, in the first aspect of the present invention, the surface layer and the inner layer are partially or wholly adhered when the reverse guide liner and the inner layer are inserted into the surface layer by reverse rotation. Or, it is characterized by welding.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, an adhesive is applied to the inner surface of the inner layer by a spray device when the inverted guide liner and the inner layer are inserted into the surface layer in an inverted manner. The surface layer and the inner layer are partially or wholly adhered to each other.

An eleventh aspect of the present invention is characterized in that, in the tenth aspect of the present invention, the adhesive is a hot melt adhesive.

Therefore, according to the present invention, since the surface layer and the inner layer are separately manufactured, each of them is manufactured with good workability, and particularly, the plastic film coated on the outer surface of the surface layer is not damaged. I do not attach.

Further, since the reverse guide liner and the inner layer are reversely inserted into the surface layer by applying a fluid pressure to the reverse guide liner, the inner layer is smoothly inserted into the surface layer so that the inner layer can be smoothly inserted into the surface layer. And the inner layer can be easily overlapped to form a multilayer structure. By impregnating the surface layer and the inner layer with the respective resin adsorbents of the curable resin, a multi-layer tube lining material having a desired plate thickness can be obtained. It can be easily manufactured with good workability.

[0024]

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

1 to 5 are sectional views showing a method of manufacturing a pipe lining material according to the present invention in the order of steps, FIG. 6 is an enlarged detailed view of an end processing portion of the pipe lining material, and FIG. 7 is manufactured by the method of the present invention. FIG. 4 is a partial perspective view of a pipe lining material applied.

In the method of the present invention, as shown in FIG. 1, one end of a highly airtight tubular reversal guide liner 3 is attached to the outer periphery of the cylindrical portion 4a of the frame 4, and inside the reversal guide liner 3, The tubular inner layer 2 is pulled in by pulling the pulling rope 5 attached to one end thereof in the direction indicated by the arrow. If a lubricant such as oil or wax is applied to the inner peripheral surface of the reversal guide liner 3 in advance, the internal layer 2 can be smoothly drawn into the reversal guide liner 3 without resistance.

The reversing guide liner 3 is formed by covering the outer surface of a tubular woven fabric with a highly airtight plastic film or rubber, and the tubular woven fabric is made of nylon, polyester, acrylic, rayon, cotton. And the like, and as the plastic film, a polyurethane film, a vinyl chloride film, a polyethylene film or a composite film thereof is used. In the present embodiment, a sheet formed by covering a nylon woven fabric with a polyurethane film is sewn in a tubular shape, and a ribbon tape is adhered to a joint portion of the sheet to seal the sheet.
Was prepared.

The inner layer 2 is made of a tubular resin adsorbing material 2A, and the tubular resin adsorbing material 2A is made of a tubular non-woven fabric made of a carrier such as polyester, acrylic, nylon, glass, carbon, ceramic or a mixture thereof. Have been.

When the insertion of the inner layer 2 into the reverse guide liner 3 has been completed over its entire length, as shown in FIG. 2 and into the tubular surface layer 1 upside down. At this time, a spray device 30 is introduced into the surface layer 1, and the spray device 30 moves the inside of the surface layer 1 before the reversal guide liner 3 and the reversal portion of the inner layer 2 in the direction indicated by the arrow (reversal direction). The adhesive 26 is applied to part or all of the inner peripheral surface of the surface layer 1 while moving at a predetermined speed (a speed substantially equal to the reversal speed of the reversal guide liner 3 and the inner layer 2).

The surface layer 1 is formed by coating the outer surface of a tubular resin adsorbent 1A with a highly airtight plastic film 1B.
Is composed of the same type of tubular nonwoven fabric as
As the plastic film 1B, a composite film of three types and five layers having a nylon film layer is used.

As the fluid pressure acting on the reversing guide liner 3, water pressure, gas pressure, etc. can be used in addition to air pressure, but air pressure is preferable.

As described above, while the adhesive 26 is applied to part or all of the inner peripheral surface of the surface layer 1 by the spray device 30 moving in the surface layer 1, the reversal guide liner 3 and the inner layer 2 are aired. When the inner layer 2 is inverted and inserted into the surface layer 1 by pressure, the outer peripheral surface of the inverted inner layer 2 comes into close contact with the inner peripheral surface of the surface layer 1, and the inner layer 2 and the surface layer 1 are partially or entirely bonded by the adhesive 26. To be integrated.

As the adhesive 26, a hot melt adhesive such as polyamide, polyethylene, polypropylene, ethylene vinyl alcohol or the like is suitable, but a solvent-based adhesive can also be used. Further, as a method of bonding the surface layer 1 and the inner layer 2, a method of thermally welding the both using a burner or a heater can also be used.

When the reversal guide liner 3 and the inner layer 2 are inserted into the surface layer 1 in the reverse direction over the entire length as described above, as shown in FIG. And 2
A pull-back rope 27, which is superimposed on the layers and partially or wholly adhered, and one end of which is previously attached to an end (reversing end) of the reversing guide liner 3, is drawn into the reversing guide liner 3. Note that the diameter of the inner layer 2 is set to be larger than the diameter of the surface layer 1.

Next, if the pull-back rope 27 is pulled in the direction of the arrow as shown in FIG. 5 from the state shown in FIG. 4, the reversing guide liner 3 is re-inverted from the reversing end side while the internal pressure is applied thereto. At this time, since the surface layer 1 and the internal layer 2 are partially or wholly adhered to each other as described above, no deviation occurs between them. When the reversal guide liner 3 is pulled out from the inner layer 2 in this manner, each end of the remaining surface layer 1 and the inner layer 2 is subjected to end processing as shown in detail in FIG.

Here, the end processing will be described.

That is, one end of each of the surface layer 1 and the inner layer 2 is fixed using the bolt 6 and the nut 7 and the washers 8 and 9, and the end faces of the surface layer 1 and the inner layer 2 are highly airtight. Covered by cover 11. In addition, end cover 1
1 is integrally formed with an air vent duct 11a. When the air vent of the surface layer 1 and the internal layer 2 is completed, the air vent duct 11a is connected as shown in the drawing to prevent the air from entering and exiting.

A base member 12 is adhered to both surfaces of the surface layer 1 through which the bolts 6 pass, and a traction rope mounting belt 13 and a hot water hose mounting belt 14 are attached to one end of the surface layer 1 and one end of the inner layer 2. 6, bolts 6 and nuts 7 and washers 8, which are exposed to the outside.
9 is covered with a cover 15. In addition, the base member 12 and the cover 15 are configured by covering one surface of a nonwoven fabric with a plastic film.

When the above-mentioned end machining is completed,
By impregnating each of the tubular resin adsorbents 1A and 2A of the surface layer 1 and the inner layer 2 with a curable resin such as unsaturated polyester, a two-layer structure of the surface layer 1 and the inner layer 2 as shown in FIG. The constituent pipe lining material 10 is obtained. As described above, since the surface layer 1 and the inner layer 2 are partially or wholly adhered to each other, no displacement occurs between the two during the impregnation operation of the curable resin.

According to the method of the present invention, the surface layer 1 and the inner layer 2 can be separately manufactured. Here, the method of manufacturing the surface layer 1 will be described with reference to FIGS. explain. 8 to 11 are explanatory views showing a method of manufacturing the surface layer 1 in the order of steps, and FIG. 12 is a sectional view showing vacuum evacuation of the tubular resin adsorbent 1A.

In the manufacture of the surface layer 1, first, as shown in FIG. 8, widthwise ends of the resin adsorbent 1A cut in a band shape are overlapped, and the overlapped portion is sewn with a sewing machine (lock stitching). When this stitching is completed, the stitched portion is pulled in the circumferential direction, and as shown in FIG. 9, the tubular resin adsorbing material 1A whose both ends in the width direction are butted together.
Get.

As a method of forming the tubular resin adsorbent 1A, in addition to the lock stitching described above, the butt portion of the strip-shaped resin adsorbent 1A is joined by linear sewing, punching with a needle, welding, bonding with an adhesive, or the like. Can be adopted.

Next, as shown in FIG. 10, the tubular resin adsorbent 1A is passed through a seamless tubular plastic film 1B, and a highly airtight pressurized tube 16 is placed inside the tubular resin adsorbent 1A. Insert

Thus, the pressurizing tube 16 is sealed from the state shown in FIG. 10 by closing both ends of the pressurizing tube 16, and as shown in FIG. When compressed air is supplied to the inside, the pressurized tube 16 expands under the pressure of the compressed air, and pushes the tubular resin adsorbent 1A and the plastic film 1B into a tubular shape.

Then, while maintaining the above-mentioned state, as shown in FIGS. 11 and 12, a vacuum pump 19 and a vacuum hose 20 are used to depressurize the tubular resin adsorbing material 1A, thereby obtaining a tubular resin adsorbing material. The plastic film 1B located outside the material 1A is attracted by the negative pressure generated in the tubular resin adsorbent 1A and adheres to the outer surface of the tubular resin adsorbent 1A.

Thereafter, as shown in FIG. 11, the tubular resin adsorbent 1A is passed through a cylindrical heating device 21 together with the plastic film 1B and the pressurizing tube 16. When the plastic film 1B is moved from one end to the other end of the tubular resin adsorbent 1A in the direction of the arrow in the figure, the plastic film 1B is heated by the heating device 21 and welded to the outer peripheral surface of the tubular resin adsorbent 1A one after another. The outer surface of 1A is covered with a plastic film 1B. The heating device 21 is constituted by a plurality of linear electric heaters 24 attached to the inner peripheral surface of a cylindrical tubular body 23 having a diameter sufficiently larger than the tubular resin adsorbent 1A. When the power is supplied from the power supply 25, the electric heater 24 generates heat and the plastic film 1B is heated as described above.

Incidentally, the surface layer is also manufactured by the method shown in FIGS. 13 and 14 are partial perspective views showing another method of manufacturing the surface layer 1.

That is, as shown in FIG. 13, a strip-shaped resin adsorbent 1 having a plastic film 1B coated on one side is provided.
A is rounded into a tube so that the plastic film 1B is located outside, and the ends thereof are joined by sewing, as shown in FIG. 14, and then thin on the outer periphery of the resin adsorbent 1A along the joining portion thereof. The surface layer 1 may be obtained by bonding the band-shaped nonwoven fabric 1a with a thermal adhesive to hermetically seal the joint. Incidentally, as the thermal adhesive, polyethylene,
A nylon type is used.

On the other hand, the inner layer 2 is manufactured by a method similar to that shown in FIGS.

That is, although not shown, the widthwise end portions of the resin adsorbent material 2A cut in a belt shape are overlapped with each other, and the overlapped portions are sewn with a sewing machine (lock stitching). By pulling in the circumferential direction, the tubular resin adsorbent 2A can be manufactured. Here, the same material as the tubular resin adsorbent 1A of the surface layer 1 is selected as the material of the tubular resin adsorbent 2A.

The method of molding the tubular resin adsorbent 2A of the inner layer 2 is not limited to the lock stitching described above, but may be performed by straight stitching, punching with a needle, welding, bonding with an adhesive, or the like. A method of joining the butted portions can be adopted.

Thus, according to the present embodiment, the surface layer 1
And the inner layer 2 can be manufactured separately, so that each manufacturing is performed with good workability.
Does not damage the plastic film 1B coated on the outer surface thereof.

Further, since the reverse guide liner 3 and the inner layer 2 are reversely inserted into the surface layer 1 by applying air pressure to the reverse guide liner 3, the inner layer 2 is smoothly inserted into the surface layer 1. The surface layer 1 and the inner layer 2 can be easily overlapped to form a multi-layer structure by impregnating the tubular resin adsorbents 1A and 2A of the surface layer 1 and the inner layer 2 with a curable resin. The multi-layer tube lining material 10 having a desired plate thickness can be easily manufactured with good workability.

In this embodiment, the inner layer has a single-layer structure. However, if the inner layer is formed of a tubular resin adsorbent having a multilayer structure of two or more layers, a tube lining having a multilayer structure of three or more layers is formed. The material can be manufactured in a similar manner.

Further, in this embodiment, the reversal guide liner 3 and the inner layer 2 are reversed and inserted into the surface layer 1, and then the reversal liner 3 is removed from the inner layer 2 while applying an internal pressure thereto. After impregnating each of the tubular resin absorbents 1A and 2A of the surface layer 1 and the inner layer 2 with a curable resin, the reversal guide liner 3 is applied to the inner layer 2 while applying an internal pressure thereto.
It may be taken out from.

[0056]

As is apparent from the above description, according to the present invention, another tubular resin adsorbent is provided inside the surface layer formed by coating the outer surface of the tubular resin adsorbent with a highly airtight plastic film. As a method of manufacturing a tube lining material constituted by impregnating a curable resin into both tubular resin adsorbents, the inner layer is inserted into a highly airtight tubular inversion guide liner, After applying the fluid pressure to the reversing guide liner to insert the reversing guide liner and the inner layer in the surface layer, the curable resin is impregnated into the tubular resin absorbent of the surface layer and the inner layer. Therefore, an effect is obtained that a pipe lining material having a multilayer structure can be easily manufactured with good workability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a method for manufacturing a pipe lining material according to the present invention.

FIG. 2 is a cross-sectional view illustrating a method for manufacturing a pipe lining material according to the present invention.

FIG. 3 is a cross-sectional view illustrating a method for manufacturing a pipe lining material according to the present invention.

FIG. 4 is a sectional view showing a method for manufacturing a pipe lining material according to the present invention.

FIG. 5 is a cross-sectional view illustrating a method for manufacturing a pipe lining material according to the present invention.

FIG. 6 is an enlarged detailed view of an end processing portion of the pipe lining material manufactured by the manufacturing method according to the present invention.

FIG. 7 is a partial perspective view of a pipe lining material manufactured by a manufacturing method according to the present invention.

FIG. 8 is an explanatory view showing a method for manufacturing a surface layer.

FIG. 9 is an explanatory view illustrating a method for manufacturing a surface layer.

FIG. 10 is an explanatory view showing a method for manufacturing a surface layer.

FIG. 11 is an explanatory diagram illustrating a method for manufacturing a surface layer.

FIG. 12 is a sectional view showing evacuation of the tubular resin adsorbent.

FIG. 13 is a partial perspective view showing another method for manufacturing a surface layer.

FIG. 14 is a partial perspective view showing another method for manufacturing a surface layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface layer 1A Tubular resin adsorbent 1B Plastic film 2 Inner layer 2A Tubular resin adsorbent 3 Inversion guide liner 6 Bolt 7 Nut 8,9 Washer 10 Tube lining material 11 End cover 15 Cover 26 Adhesive 26 Pull back rope 30 Spray device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 9:00 23:00

Claims (11)

[Claims] 1. An inner layer made of another tubular resin adsorbent is provided inside a surface layer in which the outer surface of the tubular resin adsorbent is covered with a highly airtight plastic film, and both tubular resin adsorbents are cured. A method for producing a pipe lining material constituted by impregnating a conductive resin, comprising inserting the inner layer into a highly airtight tubular reversal guide liner, and applying a fluid pressure to the reversal guide liner to form the reversal guide. A method for producing a pipe lining material, comprising: inserting a liner and an inner layer upside down into the surface layer, and then impregnating each of the tubular resin absorbents of the surface layer and the inner layer with a curable resin. 2. The reversal guide liner after the reversal guide liner and the inner layer are reversely inserted into the surface layer or after the tubular resin absorbent of the surface layer and the inner layer is impregnated with a curable resin. 2. The method for producing a pipe lining material according to claim 1, wherein the material is extracted from the inner layer while applying an internal pressure thereto. 3. The method for producing a pipe lining material according to claim 1, wherein the plastic film is composed of a composite film of three types and five layers having a nylon film layer. 4. The method for manufacturing a pipe lining material according to claim 1, wherein the plastic film is closely adhered to an outer surface of the tubular resin adsorbent of the surface layer by a reduced pressure method and is thermally welded. . 5. The method for producing a pipe lining material according to claim 1, wherein said reversing guide liner is formed by coating an outer surface of a tubular woven fabric with a highly airtight plastic film or rubber. 6. The method for producing a pipe lining material according to claim 1, wherein one end of a pull-back rope is attached to an inversion end of the inversion guide liner. 7. After extracting the reverse guide liner from the inner layer, one end of each of the surface layer and the inner layer is fixed with a bolt, a nut and a washer, and sealed with an end cover;
The method for producing a pipe lining material according to claim 1, wherein the bolt, the nut, and the washer are covered with a cover. 8. The method according to claim 1, wherein the inner layer is formed of a tubular resin adsorbent having a multilayer structure. 9. The tube according to claim 1, wherein the surface layer and the inner layer are partially or wholly bonded or welded when the reverse guide liner and the inner layer are inserted into the surface layer in a reverse manner. Manufacturing method of lining material. 10. The surface layer and the inner layer are partially or wholly applied by applying an adhesive to the inner surface of the inner layer by a spray device when the reverse guide liner and the inner layer are inserted into the surface layer in a reverse direction. The method for producing a pipe lining material according to claim 9, wherein the pipe lining material is bonded. 11. The method according to claim 10, wherein the adhesive is a hot melt adhesive.