JP2564071B2 - Pipe lining material and manufacturing method thereof - Google Patents

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 mainly used for repairing pipelines 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, a lining is applied to the inner peripheral surface of the pipeline without excavating the pipeline to repair the pipeline. A construction method has already been proposed and put to practical use (see, for example, Japanese Patent Laid-Open No. Sho 6).
0-242038).

That is, in the above-mentioned pipe repairing method, a pipe lining material, which is made by impregnating a curable resin into a flexible resin absorbent material whose surface is coated with a highly airtight plastic tube, is fluidized by a pipe line. While inserting it while inverting it, press it against the inner peripheral surface of the pipe line, then heat the pipe lining material etc. to cure the curable resin impregnated therein, and by the cured pipe lining material This is a method of lining the inner peripheral surface of the pipeline.

By the way, in the pipe lining material used in the above-mentioned pipe repairing method, when the plastic tube and the tubular resin absorbent material are not integrated, when the pipe lining material is inserted into the pipe, There is a problem in that the plastic tube is broken because the tube and the resin absorbent material are displaced and an excessive tensile force acts only on the plastic tube.

Therefore, a manufacturing method shown in FIGS. 5 to 8 has been proposed. That is, according to this method, as shown in FIG. 5, the resin absorbent 2 is passed through a plastic tube 3 having a diameter slightly larger than that of the resin absorbent 2, and as shown in FIG. The vacuum hose 5 connected to the vacuum pump 4 is connected and the vacuum pump 4 is driven to evacuate the resin absorbent 2. Then, as shown in the figure, the plastic tube 3 is pulled by the negative pressure generated in the resin absorbent material 2 and adheres to the outer surface of the resin absorbent material 2.

While maintaining the above state, as shown in FIG. 7, the heater 6 arranged above and below the resin absorbent 2 and the plastic tube 3 which are in close contact with each other is moved in the direction of the arrow in the drawing to move the plastic tube 3. Is sequentially heated from the end, the plastic tube 3 is welded and integrated with the outer peripheral surface of the resin absorbent material 2 to obtain the pipe lining material 1 shown in FIG.

In the pipe lining material 1 manufactured by the above method, since the plastic tube 3 and the resin absorbent 2 are integrated, when the pipe lining material 1 is inserted into the pipe line. There is no deviation between the plastic tube 3 and the resin absorbent 2, and the problem that the plastic tube 3 is cut off due to the excessive tensile force acting only on the plastic tube 3 does not occur. Durability is improved.

[0008]

However, in the pipe lining material 1 manufactured by the above method, the plastic tube 3 having a diameter larger than the diameter of the resin absorbent 2 is used in the manufacturing process, and therefore, as shown in FIG. As shown in FIG. 3, the burrs 3A of the plastic tube 3 project at both ends in the width direction of the pipe lining material 2 along the length direction. Therefore, as shown in FIG.
When the pipe lining material 1 is reversed by the fluid pressure during the repair of the above, the burr 3A projects to the inner periphery of the pipe lining material 1 as shown in FIG. 10, and this burr 3A becomes a flow resistance of the fluid flowing in the pipe line 7. Problems such as occur.

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 having high durability and free of burr of a plastic tube, and a method for producing the pipe lining material. Especially.

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is directed to a pipe lining material formed by coating the surface of a tubular resin absorbent material with a plastic tube along both lengthwise ends thereof. It is characterized in that the burr of the plastic tube to be taken out is bent and welded and integrated with the main body tube.

Further, according to the present invention, the tubular resin absorbent material is passed through a plastic tube having a diameter larger than that, the resin absorbent material is decompressed, and the plastic tube is brought into close contact with the resin absorbent material, and this state is maintained. The plastic tube is heated to weld it to the resin absorbent, and at the same time, the burrs of the plastic tube that extend along the lengthwise direction are bent at both ends of the resin absorbent in the width direction, and this is welded and integrated with the main body tube. And a pipe lining material is manufactured.

[0012]

In the pipe lining material produced by the method of the present invention, burrs of the plastic tube do not occur. Therefore, even if the pipe lining material is inverted during repair of the pipe line, burrs of the plastic tube are formed on its inner peripheral surface. The problem that the fluid does not protrude and the flow resistance of the fluid flowing through the conduit increases due to burrs is eliminated.

Further, in the pipe lining material according to the present invention, since the plastic tube and the resin absorbent material are integrated, when the pipe lining material is inserted into the conduit, the plastic tube and the resin absorbent material are Does not occur, and the problem that the plastic tube is broken due to the excessive tensile force acting only on the plastic tube does not occur, and the durability of the pipe lining material is enhanced.

[0014]

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

FIG. 1 is a perspective view of a pipe lining material 1 according to the present invention, and FIGS. 2 to 4 are explanatory views showing a method of manufacturing the pipe lining material 1 in the order of steps.

As shown in FIG. 1, the pipe lining material 1 according to the present invention has polyethylene or nylon-polyethylene copolymer weight on the outer peripheral surface of a tubular resin absorbent material 2 made of a nonwoven fabric such as polyester, acrylic, nylon or polypropylene. A plastic tube 3 made of coalesced material, EVA, polypropylene or the like is adhered and coated, and burrs 3A of the plastic tube 3 projecting along the length direction at both ends in the width direction of the body tube (of the plastic tubes, The part that is in close contact with the resin absorbent, that is,
The pipe lining material 1 is welded and integrated to a portion (excluding burr) 3B, and is manufactured through the following steps.

That is, as shown in FIG. 2, a pulling rope 8 is tied to one end of a tubular resin absorbent material 2, and the pulling rope 8 is
Plastic tube 3 with a diameter slightly larger than the resin absorbent 2
When it is passed inside and pulled in the direction of the arrow in the figure, the resin absorbent material 2
Are drawn into the plastic tube 3.

Next, as shown in FIG. 3, the resin absorbent 2
To the vacuum hose 5 connected to the vacuum pump 4, and the vacuum pump 4 is driven to evacuate the resin absorbent 2. Then, as shown in the figure, the plastic tube 3
Is pulled by the negative pressure generated in the resin absorbent 2 and the resin absorbent 2
Although it adheres to the outer surface of the plastic tube 3 as described above, the diameter of the plastic tube 3 is larger than that of the resin absorbent 2,
As shown in FIG. 3, burrs 3A of the plastic tube 3 are generated at both ends of the resin absorbent 2 in the width direction.

Then, while maintaining the above state, as shown in FIG. 4, the resin absorbent 2 and the plastic tube 3 which are in close contact with each other are moved in the direction of the arrow between the heaters 6 arranged above and below. When the plastic tube 3 is sequentially heated from the end by the heater 6, the plastic tube 3 is sequentially welded and integrated with the outer peripheral surface of the resin absorbent 2. At this time, the burr 3A of the plastic tube 3 immediately after passing through the heater 6 is bent upward by the guide rollers 9 arranged vertically at the left and right ends, and the burr 3A is bent.
Is pressed by the main body tube (the portion of the plastic tube 3 excluding the burr 3A, which is in close contact with the resin absorbent 2) 3B. At this time, since the pressed burr 3A is still in a heated state, it is welded and integrated with the main body tube 3B, whereby the pipe lining material 1 shown in FIG. 1 is obtained. In addition, as the heater 6,
Those that use heat sources such as steam and electricity are adopted.

Since the burr 3A of the plastic tube 3 does not occur in the pipe lining material 1 manufactured as described above, even if the pipe lining material 1 is inverted during the repair of the pipeline, the plastic lining material is formed on the inner peripheral surface thereof. The burr 3A of the tube 3 does not project, and problems such as an increase in the flow resistance of the fluid flowing through the conduit due to the burr 3A are eliminated.

In the pipe lining material 1 according to the present invention, since the plastic tube 3 and the resin absorbent material 2 are integrated, the plastic tube 3 is inserted when the pipe lining material 1 is inserted into the pipe line. And the resin absorbent material 2 are not displaced, and the problem that the plastic tube 3 is cut off due to an excessive tensile force acting only on the plastic tube 3 does not occur, and the durability of the pipe lining material 1 is improved. To be enhanced.

[0022]

As is apparent from the above description, according to the present invention, the burrs extending over the widthwise ends of the pipe lining material formed by coating the surface of the tubular resin absorbent material with the plastic tube are bent and formed. Since it is welded and integrated with the main body tube, it is possible to obtain a pipe lining material having high durability and free of burr of the plastic tube.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe lining material according to the present invention.

FIG. 2 is an explanatory view showing a method of manufacturing a pipe lining material according to the present invention in the order of steps thereof.

FIG. 3 is an explanatory view showing a method of manufacturing a pipe lining material according to the present invention in the order of steps thereof.

FIG. 4 is an explanatory view showing a method of manufacturing a pipe lining material according to the present invention in the order of steps thereof.

FIG. 5 is an explanatory view showing a method of manufacturing a conventional pipe lining material in the order of steps thereof.

FIG. 6 is an explanatory view showing a conventional method for manufacturing a pipe lining material in the order of steps thereof.

FIG. 7 is an explanatory view showing a method of manufacturing a conventional pipe lining material in the order of steps thereof.

FIG. 8 is a perspective view of a conventional pipe lining material.

FIG. 9 is a cross-sectional view showing an inversion of the pipe lining material.

FIG. 10 is a cross-sectional view of a pipe lined with a pipe lining material.

[Explanation of symbols]

 1 Pipe Lining Material 2 Resin Absorbing Material 3 Plastic Tube 3A Burr 3B Body Tube 6 Heater 9 Guide Roller 10 Roller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takao Kamiyama 31-27 Daikanmachi, Hiratsuka-shi, Kanagawa Shonan Plastics Manufacturing Company (72) Inventor Shigeru Endo 1431 Tomita, Iwai-shi, Ibaraki Get (72) Inventor Hiroyuki Aoki 4 stock companies at 1194 Hayashi, Tokorozawa, Saitama Prefecture All (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-machi, Yuki-gun, Ibaraki Limited Yokoshima

Claims (2)

(57) [Claims] 1. A pipe lining material formed by coating the surface of a tubular resin absorbent material with a plastic tube, wherein burrs of the plastic tube protruding along the length direction are bent at both ends in the width direction of the plastic lining material. A pipe lining material characterized by being welded and integrated with a main body tube. 2. A tubular resin absorbent is passed through a plastic tube having a diameter larger than this, the resin absorbent is decompressed to bring the plastic tube into close contact with the resin absorbent, and the plastic tube is maintained in this state. It is characterized in that while heating and welding this to the resin absorbent material, burrs of the plastic tube protruding along the length direction at both ends in the width direction of the resin absorbent material are bent and integrated with the main body tube by welding. A method for manufacturing a pipe lining material.