JP2003165158A - Pipe lining work method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe lining work method by which a hermetically closed container is made compact and lightweight and thereby, facilitating the conveyance of hardware including the container to an installation site and the operating efficiency can be increased by simplifying the handling of hardware at the installation site. <P>SOLUTION: This pipe lining technique serves to use/install the pipe lining material 17 obtained by impregnating a tubular resin adsorptive material which has an outer surface airtightly coated with a plastic film, with an uncured liquid curable resin. In addition, the tubular lining material 17 is flattened and arranged in the airtight container 1 in such a state that the material 17 is folded and stacked. Further, one end of the material 17 is folded to the outside and fitted to the outer periphery of an open end of a reversed nozzle 10 connected to the airtight container 1 and the material 17 is reversely inserted into a tubular path 31 by making a fluid pressure (a water pressure) act on the interior of the airtight container 1. Finally the curable resin with which the material 17 is impregnated, is cured in such a state that the material 17 is pressed to the interior of the tubular path 31. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining method for repairing an inner surface of an aged pipe by lining the pipe.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe, a gas pipe, a communication cable pipe, and a power cable pipe buried in the ground is deteriorated, the pipe line is not digged from the ground to the inner surface of the pipe. A pipe lining method of applying a lining to repair the pipe line has been proposed and already put into practical use.

As one of the pipe lining methods, the pipe lining material is formed by impregnating an uncured liquid curable resin into a tubular resin adsorbent whose outer surface is airtightly covered with a plastic film. In this construction method, after the pipe lining material is reversed and inserted into the pipe line by fluid pressure, the pipe lining material is expanded by the fluid pressure and pressed against the inner surface of the pipe line. A method of curing the curable resin impregnated in the lining material is adopted.

By the way, in this type of pipe lining method, as one of the methods of reversing and inserting the pipe lining material into the pipe line, the pipe lining material is made flat and wound around a reel, and the entire reel is hermetically sealed. The pipe lining material wound inside the reel is bent to the outside and attached to the outer circumference of the open end of the reversing nozzle connected to the closed container. A method of inserting the lining material into the pipe by reversing is adopted.

[0005]

However, in the above inversion method using the reel, since the side surface of the reel has a disk shape, the area of the side surface becomes large and the reel is accommodated. There is a problem that the closed container becomes large.

Further, the fluid pressure required to invert a pipe lining material having a particularly small diameter and a large thickness becomes high, and a closed container having a strength to withstand the high fluid pressure becomes thick and heavy.
Therefore, there is a problem that it is difficult to carry a large reel or a large and heavy hermetic container to a construction site, and handling of the reel and the hermetic container at the construction site becomes difficult, resulting in poor workability.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the size and weight of a hermetically-sealed container to facilitate the delivery of equipment including the hermetically-sealed container to a construction site and to carry out the construction. It is to provide a pipe lining method that can facilitate the handling of equipment on site and improve workability.

[0008]

To achieve the above object, the invention according to claim 1 impregnates an uncured liquid curable resin into a tubular resin adsorbent whose outer surface is hermetically covered with a plastic film. As a construction method using a pipe lining material that is made up of, the pipe lining material is placed in a flat state by folding and stacking in a closed container, and one end of the pipe lining is folded back and connected to the closed container. Attached to the outer periphery of the opening end of the reversed nozzle, the fluid pressure is applied in the closed container to reversely insert the pipe lining material into the pipe, and the pipe lining material is pressed against the inner surface of the pipe. It is characterized in that the curable resin impregnated in is cured.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, water pressure is used as the fluid pressure.

According to a third aspect of the invention, in the second aspect of the invention, the temperature-controlled water is supplied into the closed container.

According to a fourth aspect of the present invention, in the invention according to the first aspect, the pipe lining material is preliminarily folded outside the airtight container and stacked, and a part of the airtight container is opened to maintain the above state. The pipe lining material is carried into a closed container.

According to a fifth aspect of the present invention, in the first aspect of the present invention, an unsaturated polyester resin or an epoxy resin is used as the curable resin, and before the curable resin is impregnated into the tubular resin adsorbent, A filler is added to the curable resin so that the viscosity of the curable resin at a temperature of 25 ° C. is 30 po
It is characterized in that the rocking degree is set to 1.5 or more, and ise or more.

Therefore, according to the first aspect of the present invention, since the pipe lining material is made flat and is folded and stacked in the closed container, the reel, which is conventionally required, is not required, and the closed container is eliminated. Can be made smaller and lighter to facilitate the delivery of equipment including the closed container to the construction site, and the handling of the equipment at the construction site can be facilitated to improve workability.

According to the second aspect of the present invention, since the water pressure having low compressibility is used as the fluid pressure for reversing and inserting the pipe lining material into the pipe, the reversing speed of the pipe lining material is easily controlled. be able to. Further, since the pipe lining material floats in water in the closed container, it can be smoothly guided to the reversing nozzle when the pipe lining material is reversed and inserted into the conduit.

According to the third aspect of the invention, since the temperature of the pipe lining material is controlled by adjusting the temperature of water having a high specific heat, the temperature of the pipe lining material is controlled within a range in which the curable resin does not cure. The pipe lining material can be controlled with a high precision to a value at which the inversion of the pipe lining material is smoothly performed, and the work efficiency can be improved.

According to the fourth aspect of the present invention, the pipe lining materials that have been folded and stacked outside the airtight container are loaded into the airtight container at one time. Therefore, the pipe lining material can be installed in the airtight container. You can go faster to improve work efficiency.

According to the invention of claim 5, the temperature of the curable resin is 25 ° C. by adding the filler to the curable resin.
Since the viscosity at 30 poise is set to 30 poise or more and the rocking degree is set to 1.5 or more, the reversing pressure is increased for reversing a pipe lining material having a small diameter and a large thickness, and the temperature of the pipe lining material is increased to facilitate reversal. The curable resin is not squeezed out from the tip of the pipe lining material even when the pressure is raised.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 are cross-sectional views showing the pipe lining method according to the present invention in the order of steps, FIG. 5 is a cross-sectional view of a pipe lining material (enlarged cross-sectional view taken along line AA of FIG. 1), and FIG. FIG. 7 is a sectional view taken along line BB of FIG. 3, and FIG. 7 is an enlarged detailed view of a C portion of FIG.

In FIGS. 2 and 3, reference numeral 1 is a closed container, and the closed container 1 is constructed by detachably attaching lids 3 and 4 to both ends of a cylindrical main body 2 as shown in FIG. A thermometer 5 and a pressure gauge 6 are attached to the upper part thereof.

Here, as shown in FIGS. 3 and 6, a water supply pipe 7, an insertion pipe 8 and a drain pipe 9 are sequentially attached to one lid 3 from the top to the bottom, as shown in FIG. As described above, the reversing nozzle 10 is detachably attached to the other lid 4. The lids 3 and 4 are detachably attached to the main body by a plurality of bolts 11 and nuts 12, and the reversing nozzle 10 is detachably attached to the lid 4 by a plurality of bolts 13 and nuts 14.

A guide roller 15 is provided on the upper portion of the closed container 1 near the lid 4.

Thus, in the pipe lining method according to the present invention, as shown in FIG. 1, the rectangular box-shaped storage box 16 having an open upper surface is provided with the flat pipe lining material 17 at the end end side. The sheets are alternately folded and stacked one after another and stored. The pipe lining material 17 stored in the storage box 16 as described above is transported to the construction site in a state of being kept cold in ice water or in a cool box, and about 1 hour to 10 hours before the work is started It is taken out from the inside or the cool box and set on the roller conveyor 19 on the pedestal 18 as shown in FIG.

At the construction site, as shown in FIG.
By removing the lid 4 from the main body 2 of the closed container 1,
One end is opened, the gantry 18 is installed on the opened side, and the storage box 17 is set on the roller conveyor 19 on the gantry 18. Then, one end of the rope 20 is attached to one end surface of the storage box 16, and the other end of the rope 20 is extended from the insertion tube 8 to the outside of the closed container 1 through the inside of the closed container 1 as illustrated.

Here, as shown in FIG. 5, the pipe lining material 17 is constructed by impregnating an uncured liquid curable resin into a tubular resin adsorbent material 22 whose outer surface is hermetically covered with a plastic film 21. To be done. A film of polyethylene, vinyl chloride, vinylon, polyurethane, nylon, polypropylene, polyethylene-nylon copolymer or the like is used as the plastic film 21, and a nonwoven fabric of polyester, nylon, acrylic, vinylon or the like is used as the tubular resin adsorbent 22. Is used. Further, as the uncured liquid curable resin with which the tubular resin adsorbent 22 is impregnated, thermosetting resins such as unsaturated polyester resin and epoxy resin are used, and this thermosetting resin is silica (Aerosil). , Talc, magnesium oxide, and other fillers are added, and the viscosity of the thermosetting resin at a temperature of 25 ° C. is set to 30 poise or more and the thixotropy is set to 1.5 or more.

Thus, as described above, the pipe lining material 17
Storage box 16 that is folded and stored is frame 18
When set on the roller conveyor 19, the rope 20 is pulled in the direction indicated by the arrow to move the storage box 16 in the same direction on the roller conveyor 19 as shown in FIG.
The storage box 16 is carried in through the opening at one end of the closed container 1. Then, the pipe lining material 17 stored in the storage box 16 is placed in the closed container 1 in a folded and stacked state.

As described above, when the pipe lining material 17 is carried into the closed container 1 together with the storage box 16, FIG.
As shown in FIG. 3, the lid 4 is attached to the opening of the closed container 1 at one end by a plurality of bolts 13 and nuts 14. The reversing nozzle 10 is attached to the lid 4 in advance.

Further, in the state shown in FIG. 3, one end of a water supply hose 23 is attached to the water supply pipe 7 attached to the lid 3, and the insertion pipe 8 is closed by a coupling 24.
One end of a drain hose 25 is attached to the drain pipe 9. Here, a valve 26 is provided in the middle of the drain hose 25.

By the way, the other end of the water supply hose 23 is connected to a water tank 27, and a valve 28 and a water supply pump 29 are provided in the middle thereof. Water is stored in the water tank 27, and the temperature of the water is detected by the thermometer 30.

On the other hand, in FIG. 3, reference numeral 31 denotes an existing pipeline such as a communication cable pipeline buried in the ground.
As shown in FIG. 7, a start liner 32 is reversely inserted in the inside 1 by air pressure or the like. As the start liner 32, a polyethylene / nylon composite inflation tube, a nylon cloth / Pu coated tubular tube, or the like is used.

Then, one end of the pipe lining material 17 provided in the closed container 1 is folded back to the outside as shown in the drawing and attached to the outer periphery of the opening end of the reversing nozzle 10 by the band 33, and in that state. The water supply pump 29 is driven and the water in the water tank 27 is supplied from the water supply hose 23 into the closed container 1. At this time, the valve 26 provided on the drain hose 25 is closed and the valve 28 provided on the water supply hose 23 is opened.

As described above, when water is supplied into the closed container 1, the pipe lining material 17 is sequentially inserted into the inside of the start liner 32 in the pipe line 31 while being inverted by water pressure, and the inside of the closed container 1 is closed. Then the pipe lining material 1 which is not inverted
7 is sent to the reversing nozzle 10 while being guided by the guide roller 15. At this time, the pipe lining material 17
Is suspended in water in the closed container 1, so that the pipe lining material 17 is smoothly guided to the reversing nozzle 10.

By the way, in the conventional pipe lining method using a reel, since the reversing speed of the pipe lining material is adjusted to a constant value by rewinding the reel, a compressive fluid pressure for reversing the pipe lining material is obtained. High air pressures can be used. On the contrary, in the method of the present invention, the flatly folded pipe lining material 17 is used.
It is difficult to control the reversal speed of.

Therefore, in the method of the present invention, water pressure having low compressibility is used as the fluid pressure for reversing and inserting the pipe lining material 17 into the pipe line 31, and the reversing speed of the pipe lining material 17 is easily controlled. I was able to do it.

Further, the pipe lining material becomes soft when heated and reverses even at a low pressure, so that the reversing work becomes easy. However, when the pipe lining material is impregnated with a thermosetting resin, the pipe lining material is heated. If done too much, the pipe lining material may be cured before being inverted.

Therefore, when the pipe lining material is heated, delicate temperature control is necessary, and the temperature of the pipe lining material at the time of reversal should be set to 20 to 30 ° C.

Therefore, in the present embodiment, since the temperature of the pipe lining material 17 is controlled by adjusting the temperature of the water having a high specific heat, the temperature of the pipe lining material 17 is set within a range in which the thermosetting resin does not cure. The pipe lining material 17 can be highly accurately controlled to a value (20 to 30 ° C.) at which the reversal of the pipe lining material 17 is smoothly performed, and the work efficiency can be improved.

By the way, small diameter (diameter φ150 mm or less)
And the diameter / plate thickness ratio (hereinafter referred to as SDR) is small (S
A high pressure is required for reversing the pipe lining material of DR ≦ 50), and when the reversing pressure is increased, the curable resin impregnated in the pipe lining material may be squeezed out from the tip of the pipe lining material. Further, when the temperature of the pipe lining material is increased to facilitate the inversion, there is a problem that the viscosity of the curable resin is lowered and the curable resin is squeezed extra.

Therefore, in the present embodiment, a filler is added to the thermosetting resin as described above, the viscosity of the thermosetting resin at a temperature of 25 ° C. is 30 poise or more, and the thixotropic degree is 1.5.
The above is set. Accordingly, even if the reversing pressure is increased for reversing the pipe lining material 17 having a small diameter and a large thickness, or the temperature of the pipe lining material 17 is increased to facilitate the reversing, the pipe lining material 17 The thermosetting resin is not squeezed out from the tip of the pipe lining material 17
The reversing work can be done smoothly without any problems.

Further, in the present embodiment, the pipe lining material 17 is stored in the storage box 16 outside the closed container 1 in a state of being folded and stacked in advance, and the rope 20 is pulled to store the storage box 16 in the closed container 1. Since the pipe lining material 17 is housed in the closed container 1 at a time by carrying it in, the pipe lining material 17 can be quickly placed in the closed container 1 to improve the work efficiency. In particular, when the pipe lining material 17 impregnated with the thermosetting resin is carried into the construction site while being stored in the cool box, the pipe lining material 17 can be easily (and quickly) placed in the closed container 1. It can be carried out.

When the pipe lining material 17 arranged in the closed container 1 in a folded state as described above is reversely inserted into the pipe line 31 by hydraulic pressure, the pipe lining material 17 is heated by hot water. Since the thermosetting resin that has been heated and impregnated in the pipe lining material 17 is cured by heat, the inner surface of the conduit 31 is lined with the cured pipe lining material 17 and restored.

Here, the work of hardening the pipe lining material 17 will be described with reference to FIG.

As shown in the drawing, a closed tube 35 is connected through a joint 34 to an opening of one end of the pipe lining material 17 inserted in the pipe line 31 in an inverted manner, and the pipe lining material 17 is connected.
A closed space is formed inside, and a compressor 37 is connected to the end of the closed tube 35 via an air hose 36.

A drain hose 38 extending from the bottom of the closed tube 35 is extended to the ground, and the end of the drain hose 38 is connected to a water tank 39.
The valve 40 on the way.
Is provided. Here, the hot water pipe 41 leading out from the bottom of the water tank 39 stands up and opens at the upper part of the water tank 39, and a hot water pump 42 and a boiler 43 are provided in the middle thereof. A hot water hose 44 extending from the bottom of the water tank 39 is connected in the middle of the drain hose 38,
A hot water pump 45 and a valve 46 are provided along the way.

On the other hand, the drain hose 47 extending from the other end (end end) of the pipe lining material 17 opens above the water tank 48, and a valve 49 is provided in the middle of the drain hose 47. Here, the hot water pipe 50 led out from the bottom of the water tank 48 stands up and opens at the upper part of the water tank 48, and a hot water pump 51 and a boiler 52 are provided in the middle thereof. A hot water hose 53 extending from the bottom of the water tank 48 is connected in the middle of the drain hose 47, and a hot water pump 54 and a valve 55 are provided in the middle thereof.

When the pipe lining material 17 is hardened, the compressed air driven by the compressor 37 is supplied to the closed space inside the pipe lining material 17 via the air hose 36. 17 is expanded by air pressure and pressed against the inner surface of the conduit 31 as shown.

While maintaining the above state, the dual hot water pump 4
2, 51 and both boilers 43, 52 are driven, the hot water heated by the boilers 43, 52 is heated in the water tanks 39, 48.
The water tanks 39 and 4 are stored as follows.
The hot water in 8 is alternately flowed into the pipe lining material 17 to heat the pipe lining material 17.

That is, one valve 40 is closed and the valve 4
6 is opened, the other valve 55 is closed, and the valve 49 is opened. When one hot water pump 45 is driven, the hot water in the one water tank 39 passes through the hot water hose 44 and the drain hose 38 and the pipe lining material. It flows through the lower part in 17 and is discharged to the other drainage hose 47, falls from the drainage hose 47 into the other water tank 48, and is stored.

One of the water tanks 39 is supplied by the hot water supply described above.
When the hot water in the left is exhausted, one valve 40 is opened and the valve 44 is closed, and the other valve 55 is opened and the valve 4 is opened.
When the other hot water pump 54 is driven with 9 closed, the hot water in the other water tank 48 flows through the hot water hose 53 and the drain hose 47 in the lower direction in the pipe lining material 17 in the opposite direction for draining. The drain hose 3 is discharged to the hose 38.
It is dropped from 8 into one of the water tanks 39 and accommodated.

By repeating the above work, hot water flows in opposite directions alternately at the bottom of the pipe lining material 17, and the hot water flow causes the pipe lining material 1 to flow.
7 is uniformly heated in the longitudinal direction, and the thermosetting resin impregnated therein is hardened by heat, so that the hardened pipe lining material 17 lines and repairs the inner surface of the pipe 31.

Thus, in the pipe lining method according to the present invention described above, the pipe lining material 17 is made flat and folded in the closed container 1 to be arranged in a stacked state, which is conventionally required. Since the reel is not required, the closed container 1 can be reduced in size and weight to facilitate the loading of the equipment including the closed container 1 to the construction site, and the handling of the equipment at the construction site can be facilitated to improve workability.

The present invention has a diameter of 40 mm to 400 mm.
It is suitable for relatively small diameter communication cable pipes, power cable pipes, gas pipes, sewer pipes, etc., which are repaired by using a pipe lining material with SDR ≦ 50 in mm.

[0053]

As is apparent from the above description, according to the present invention, a pipe formed by impregnating an uncured liquid curable resin into a tubular resin adsorbent whose outer surface is hermetically covered with a plastic film. As a construction method using a lining material, the pipe lining material is arranged in a flat state by folding and stacking in a closed container, one end of which is folded back to the outside and a reversing nozzle connected to the closed container. Was attached to the outer periphery of the open end of the pipe, and the pipe lining material was inverted and inserted into the pipe by applying fluid pressure in the closed container, and the pipe lining material was impregnated into the pipe lining material while being pressed against the inner surface of the pipe. Since the curable resin is cured,
It is possible to reduce the size and weight of the hermetically-sealed container so that the equipment including the hermetically-sealed container can be easily carried into the construction site, and the equipment can be easily handled at the construction site to improve workability.

[Brief description of drawings]

FIG. 1 is a sectional view showing a pipe lining method according to the present invention.

FIG. 2 is a cross-sectional view showing a pipe lining method according to the present invention.

FIG. 3 is a sectional view showing a pipe lining method according to the present invention.

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

5 is a cross-sectional view (enlarged cross-sectional view taken along the line AA of FIG. 1) of the pipe lining material.

FIG. 6 is a sectional view taken along line BB of FIG.

FIG. 7 is an enlarged detailed view of a C portion of 3.

[Explanation of symbols]

1 closed container 10 Inversion nozzle 16 storage boxes 17 Pipe lining material 21 plastic film 22 Tubular resin adsorbent 31 pipeline

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuhiro Yokoshima             175-3 Sasayama, Ishishita-cho, Yuki-gun, Ibaraki             Company Yokoshima F term (reference) 4F211 AA36 AA39 AA41 AD05 AD16                       AG03 AG08 SA14 SC03 SD04                       SP15

Claims (5)

[Claims] 1. A method of constructing a tubular resin adsorbent, the outer surface of which is hermetically covered with a plastic film, impregnated with an uncured liquid curable resin, the method comprising: The lining material is laid flat and arranged in a state of being folded and stacked in a closed container, one end of which is folded back and attached to the outer periphery of the opening end of the reversing nozzle connected to the closed container, and the fluid inside the closed container It is characterized in that the pipe lining material is reversely inserted into the pipe line by applying pressure, and the curable resin impregnated in the pipe lining material is cured while the pipe lining material is pressed against the inner surface of the pipe pipe. Pipe lining method. 2. The pipe lining method according to claim 1, wherein water pressure is used as the fluid pressure. 3. The pipe lining method according to claim 2, wherein the temperature-controlled water is supplied into the closed container. 4. The pipe lining material is preliminarily folded and stacked outside the closed container, and a part of the closed container is opened so that the pipe lining material in the above state is carried into the closed container. The pipe lining method according to claim 1. 5. An unsaturated polyester resin or epoxy resin is used as the curable resin, and a filler is added to the curable resin before the tubular resin adsorbent is impregnated with the curable resin. Viscosity at 25 ° C of 30
The pipe lining method according to claim 1, wherein the rocking degree is set to 1.5 or more and the poise is set to 1.5 or more.