JP2002086564A - Pipe lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe lining method which can reduce construction costs by using a hot water hose for pipe lines of various lengths without disposing of the hose. SOLUTION: In the pipe lining method in which a pipe lining material 6 in which a tubular resin absorbent material is impregnated with an uncured thermosetting resin, after being inserted into a pipe line 1, is expanded by air pressure and heated by being showered with hot water supplied from the hot water hose 15 introduced into the pipe lining material 6 while being pressed to the inner wall of the pipe line 1, and the thermosetting resin contained in the pipe lining material 6 is cured, a hot water ejecting nozzle 16 is fitted to a part of the hose 15 and moved in the pipe lining material 6 expanded in the pipe line 1 while hot water is ejected locally from the hot water ejecting port of the nozzle 16, and the pipe lining material 6 is heated in turn in the longitudinal 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 method for lining and repairing an aged pipe using a pipe lining material impregnated with an uncured thermosetting resin.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe is deteriorated, a pipe lining method for repairing the pipeline by lining the inner peripheral wall without excavating the pipeline from the ground has been proposed. It is already in practical use.

[0003] As one of such pipe lining methods, a pipe lining material obtained by impregnating an uncured thermosetting resin into a tubular resin adsorbent is inserted into a pipe, and then the pipe lining material is pneumatically compressed. In a state where the pipe lining is pressed against the inner wall of the pipe line, hot water is drawn from a hot water hose drawn into the pipe lining material to heat the pipe lining material, and the pipe lining material is impregnated with the water. A method for curing a thermosetting resin is known.

[0004]

However, in such a pipe lining method, a hot water hose having a length corresponding to the length of the pipeline is prepared for each lining, and the hot water hose is discarded when the lining is completed. In addition, the construction cost is increased, and the work of disposing of the hot water hose is also difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the construction cost by sharing hot water hoses for pipes of various lengths without disposing of the hot water hoses. An object of the present invention is to provide a pipe lining method capable of reducing the number of pipes.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a tube lining material obtained by impregnating a tubular resin adsorbent with an uncured thermosetting resin is inserted into a pipeline. Then, while the pipe lining material is expanded by air pressure and pressed against the inner wall of the pipe, hot water supplied from a hot water hose drawn into the inside of the pipe lining material is showered to form the pipe lining material. Heating,
In a pipe lining method in which the thermosetting resin impregnated in the pipe lining material is cured, a hot water injection nozzle is attached to a part of the hot water hose, and the hot water injection nozzle is used to locally supply hot water from the hot water injection port. The inside of the pipe lining material expanded in the pipe line while being jetted is moved to sequentially heat the pipe lining material in the longitudinal direction.

According to a second aspect of the present invention, in the first aspect, the hot water hose is wound around a hose reel,
A traction rope is attached to the hot water hose or the hot water injection nozzle, and the hot water injection nozzle is moved inside the pipe lining material while winding the traction rope with the hose reel.

According to a third aspect of the present invention, in the first or second aspect, a plurality of the hot water injection nozzles are detachably attached to the hot water hose at appropriate intervals.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, a hot water injection port formed in the hot water injection nozzle is provided at a bottom of the pipe lining material. The opening is provided at a position higher than the position.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the hot water injected from the hot water injection nozzle is discharged out of the pipe lining material, and is reheated. The operation of supplying the hot water to the hot water hose and injecting the hot water from the hot water injection nozzle is repeated.

According to a sixth aspect of the present invention, in the first to fourth or fifth aspects of the present invention, a buoyant body is mounted near the hot water injection nozzle or the hot water injection nozzle of the hot water hose.

According to a seventh aspect of the present invention, in the first to fifth or sixth aspects of the present invention, the hot water injection angle from the hot water injection nozzle is set to 5 ° to 45 °.

Therefore, according to the present invention, the hot water injection nozzle is moved inside the pipe lining material while locally jetting hot water from the hot water injection port, so that the pipe lining material is sequentially heated in the longitudinal direction. As a result, the hot water hose can be commonly used for pipes of various lengths without discarding the hot water hose, thereby reducing the construction cost.

[0014]

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

1 and 2 are sectional views showing a pipe lining method according to the present invention in the order of steps, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is an enlarged detailed view of a portion B of FIG. .

In FIG. 1, reference numeral 1 denotes a pipeline such as a sewer pipe buried underground, and a manhole 2 opening to the ground is connected to the pipeline 1.

Thus, when lining the pipe 1,
As shown in FIG.
A stepped cylindrical reversing nozzle 3 is inserted and set, and one end of a highly airtight guide tube 4 is connected to a small-diameter end of the reversing nozzle 3. And this guide tube 4
Stands up from the reversing nozzle 3 and extends upward in the manhole 2 to the ground, and a top nozzle 5 is attached to an extending end (upper end) thereof.

On the other hand, the large-diameter end of the reversing nozzle 3 is open toward the pipe line 1 as shown in the figure, and one end of a tubular pipe lining material 6 is folded outward around the end. Attached. An air hose 8 derived from a compressor 7 installed on the ground is attached to the upper part of the reversing nozzle 3.
Is provided with a valve 9 in the middle.

Here, the tube lining material 6 is formed by impregnating an uncured thermosetting resin into a tubular resin adsorbent whose outer surface is covered with a highly airtight plastic film. As the tubular resin adsorbent, a non-woven fabric made of a plastic fiber such as polyester, vinylon or acrylic is used, and as the plastic film coated on the outer surface thereof, a composite film containing polyurethane, polyethylene, vinylon, EVA or EVOH is used. Is used. As the thermosetting resin impregnated in the tubular resin adsorbent, an unsaturated polyester resin, an epoxy resin, a vinyl ester resin or the like is used.

By the way, although not shown, the pipe lining material 6 is immersed in ice water of a water tank installed on the ground so that the thermosetting resin impregnated therein is not cured before lining. Is partly taken out of the ice water in the water tank and passed through the guide tube 4 and the reversing nozzle 3, one end of which is folded outward and attached to the outer periphery of the large-diameter end of the reversing nozzle 3 as described above. Can be

In the above state, when water is injected into the guide tube 4 from the water injection hose 10 as shown in FIG.
The pipe lining material 6 is inserted into the pipeline 1 while being inverted by water pressure. When the pipe lining material 6 is inverted and inserted into the pipeline 1 by a predetermined length, the pipe lining material 6 is inserted.
A pressurized space S 'sealed with water is formed in the inside as shown in FIG.

When the compressor 7 is driven to supply compressed air from the air hose 8 to the pressurized space S ', as shown in FIG. 1, the pipe lining material 6 is reversed by receiving the pressure of the compressed air. While being inserted, it is sequentially inverted into the pipe 1.

As described above, when the pipe lining material 6 is inverted and inserted over the entire length of the pipe 1, as shown in FIG. 2, the fixing ring 11 fixed to the inverted end of the pipe lining material 6. A hot water hose 13 attached by a rope 12, a tow rope 14 passed through a fixing ring 11, and a hot water hose 15 attached to the tow rope 14 are drawn into the pipe lining material 6. Here, a plurality of hot water injection nozzles 16 made of metal or plastic are detachably attached to the distal end of the hot water hose 15 drawn into the pipe lining material 6, and each hot water injection nozzle 16 is not shown. Hot water injection holes are drilled.
The type and number of the hot water injection nozzles 16 are determined by the diameter and length of the pipe lining material 6, and the hot water injection nozzles 1
6 is determined according to the length of the hot water hose 15.

A disc-shaped cap 17 is attached to the top nozzle 5 by a plurality of G clamps 18 to form a closed space S inside the guide tube 4, the reversing nozzle 3 and the pipe lining material 6. However, the portion of the cap 17 through which the hot water hoses 13 and 15 and the tow rope 14 penetrate, as shown in FIG.
It is hermetically sealed by urethane packing 32 sandwiched between 0 and 31. Here, the hot water hoses 13, 15
The tow rope 14 has a regular circular cross section, and its surface is formed smoothly to reduce friction with the elastic sealing member. The hot water hoses 13 and 15 and the traction rope 14 have a predetermined resistance to external force so as not to be deformed by the pressing force of the elastic sealing member.

On the other hand, as shown in FIG. 2, a hot water tank 19 is provided on the ground, and the hot water tank 19 contains hot water. A hot water hose 20 extends from a lower portion of the hot water tank 19, and a hot water pump 21 and a boiler 22 are provided in the middle of the hot water hose 20.

An end of one of the hot water hoses 13 extending outside the closed space S is connected to the hot water hose 20, and a hot water hose 24 connected to a hose reel 23 is connected to the hot water hose 20.
Is connected. An end of the other hot water hose 15 extending outside the closed space S is wound around the hose reel 23. The tip of the portion of the hot water hose 13 inserted into the closed space S has a pipe lining material 6 as shown in the figure.
It is open near the inverted end of the inner bottom.

The end of the tow rope 14 extending outside the closed space S is wound around a reel 25 as shown. The cap 17 is connected to an air hose 26 derived from the compressor 7, and the air hose 26 is provided with a valve 27.

Further, one end of a hot water discharge hose 28 is connected to the reversing nozzle 3.
Rises from the reversing nozzle 3 and extends upward in the manhole 2 to the ground, and its end is open above the hot water tank 19.

When the inverted insertion of the pipe lining material 6 into the pipe line 1 is completed as shown in FIG. 2, the compressed air supplied from the compressor 7 to the closed space S via the air hoses 8 and 26 is used. While keeping the internal pressure of the sealed space S constant, the hot water pump 21 and the boiler 22 are driven to supply hot water of a predetermined temperature to the hot water hoses 13 and 15.
Then, the hot water supplied to one of the hot water hoses 13 flows out from the front end of the hot water hose 13 to the front end (reversing end) of the inner bottom of the pipe lining material 6 and flows from the front to the rear end of the inner bottom of the pipe lining material 6. A circular flow is formed to heat the pipe lining material 6 substantially uniformly in the longitudinal direction.

The hot water supplied to the other hot water hose 15 is sprayed in a shower form from the hot water injection ports opened to the respective hot water injection nozzles 16 to locally heat the pipe lining material 6. By rotating the reel 25 and winding the traction rope 14 around the reel 25 while injecting the hot water from the injection nozzle 16, the hot water injection nozzle 16 and the hot water hose 15 are arranged together with the hot water hose 15 at the rear end (the left end in FIG. 2). ) From the front end (the right end in FIG. 2) in the length direction, the pipe lining material 6 is sequentially heated in the length direction from the rear end to the front end by the hot water jetted from the hot water jet nozzle 16. . In this case, hot water hose 1
5 are sequentially sent out from the hose reel 23.

Each of the hot water injection nozzles 16 has an injection port whose injection angle is set at 5 ° to 45 ° so that hot water is efficiently injected in the longitudinal direction of the pipe lining material 6 and the pipe lining material 6.
In this case, a plurality of injection ports each having an injection angle of 45 ° to 90 ° are formed so that hot water directly hits the nozzle.

The hot water which flows out from the front end of the hot water hose 13 and forms a circulating flow from the front end to the rear end at the bottom of the pipe lining 6 and is jetted from each hot water injection nozzle 16 to form the pipe lining material 6 The hot water supplied to the heating of the closed space S from the hot water discharge hose 28 by the internal pressure of the closed space S
It is discharged to the outside and the hot water tank 19
Is returned to. Then, the hot water returned to the hot water tank 19 is sent to the boiler 22 by the hot water pump 21 and reheated to a predetermined temperature by the boiler 22, and then supplied to the hot water hoses 13 and 15, respectively, and the pipe lining material is supplied as described above. 6 for heating. Thereafter, the same operation is repeated to circulate hot water, and the circulating hot water heats the pipe lining material 6.

When the pipe lining material 6 is heated by hot water as described above, the thermosetting resin impregnated in the pipe lining material 6 is hardened, and the inner wall of the pipe 1 is hardened by the hardened pipe lining material 6. It is lined and repaired.

As described above, in the pipe lining method according to the present invention, the hot water injection nozzle 16 is moved inside the pipe lining material 6 while locally injecting hot water from the hot water injection port to thereby move the pipe lining material 6. Are sequentially heated in the length direction, so that the hot water hose 15 can be commonly used for pipes of various lengths without being discarded, thereby reducing the construction cost. .

When the pipe is slack or the amount of hot water staying at the bottom of the pipe lining material is large, the hot water injection nozzle of the hot water injection nozzle is buried in the hot water and the hot water is injected into the pipe lining material. Is not done efficiently. Therefore, it is necessary to open the hot water injection port formed in the hot water injection nozzle at a position higher than the position of the hot water hose provided at the bottom in the pipe lining material.
Each is shown in FIG. In FIGS. 5 to 8, FIG.
The same elements as those shown in FIGS.

In the configuration shown in FIG.
Is formed in a cross-shaped cross section, a portion of the hot water injection nozzle 16 is exposed on the surface of the hot water staying at the bottom in the pipe lining material 6, and the hot water is reliably injected from the hot water injection port formed at the end thereof. I try to make it.

In the configuration shown in FIG.
Are formed by forming small-diameter hot water jets 16b on both sides of a central large-diameter raising platform 16a, and exposing the hot water jets 16b on both sides raised by the raising platform 16a to the surface of the hot water, and It is ensured that hot water is injected from a hot water injection port that opens in the portion where the hot water is injected.

In the configuration shown in FIG.
Is formed in a forked shape, the forked portion is raised, a part of the hot water injection nozzle 16 is exposed on the surface of the hot water, and the hot water is reliably injected from the hot water injection opening opened in the exposed portion. I have to.

In the configuration shown in FIG.
A buoyant body 29 such as a plastic foam body is attached to the hot water jet nozzle 16 by the buoyancy acting on the buoyant body 29.
Is floated on the hot water and the hot water spray nozzle 16 is placed on the hot water surface.
Is exposed, and hot water is reliably injected from a hot water injection port opened to the exposed portion. still,
The buoyant body 29 may be attached to the hot water hose 15 near the hot water injection nozzle 16.

[0040]

As is apparent from the above description, according to the present invention, after a tubular lining material made by impregnating an uncured thermosetting resin into a tubular resin adsorbent is inserted into a pipeline, the tubular sorbent is inserted into the tubular conduit. In a state where the pipe lining material is expanded by air pressure and pressed against the inner wall of the pipe, hot water supplied from a hot water hose drawn into the pipe lining material is showered to heat the pipe lining material, In a pipe lining method in which the thermosetting resin impregnated in the pipe lining material is cured, a hot water injection nozzle is attached to a part of the hot water hose, and the hot water injection nozzle is used to locally supply hot water from the hot water injection port. Since the inside of the pipe lining material expanded in the pipe line while being jetted is heated so that the pipe lining material is sequentially heated in the longitudinal direction, the hot water hose is discarded. No can share the hot water hose for various lengths of pipe, there is an advantage that it is possible to reduce the construction cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a pipe lining method (reversed insertion work) according to the present invention.

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

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged detail view of a portion B in FIG. 2;

FIG. 5 is a sectional view showing another embodiment 1 of the hot water injection nozzle.

FIG. 6 is a sectional view showing another embodiment 2 of the hot water injection nozzle.

FIG. 7 is a sectional view showing another embodiment 3 of the hot water injection nozzle.

FIG. 8 is a sectional view showing another embodiment 4 of the hot water injection nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 6 Pipe lining material 7 Compressor 13 Hot water hose 14 Tow rope 15 Hot water hose 16 Hot water injection nozzle 22 Boiler 23 Hose reel 29 Buoyant body

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 592004301 All Co., Ltd. 1-194, Hayashi, Tokorozawa-shi, Saitama 4 (72) Inventor Takao Kamiyama 31-27 Daikancho, Hiratsuka-shi, Kanagawa Shonan Synthetic Resin Co., Ltd. In-house (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Pref.Yokoshimanai Co., Ltd. (72) Inventor Shigeru Endo 2-12-4 Hanahata, Tsukuba, Ibaraki Pref. Inventor Hiroyuki Aoki All four F-terms at 1-194 Hayashi, Tokorozawa-shi, Saitama F-term (reference) 3H025 EA01 EB23 EC06 ED02 EE05 4F211 AD12 AD20 AG03 AG08 AH43 AK01 SA13 SA14 SA15 SC03 SD04 SD11 SD23 SH06 SN03 SP12 SP15 SP21

Claims (7)

[Claims] 1. A pipe lining material obtained by impregnating an uncured thermosetting resin into a tubular resin adsorbent is inserted into a pipe, and then the pipe lining material is expanded by air pressure, and the expanded pipe lining is removed from the pipe. While pressed against the inner wall, hot water supplied from a hot water hose drawn into the inside of the pipe lining material is heated to heat the pipe lining material, thereby curing the thermosetting resin impregnated in the pipe lining material. In the pipe lining method, a hot water injection nozzle is attached to a part of the hot water hose, and the hot water injection nozzle expands in a pipe while locally injecting hot water from the hot water injection port. A pipe lining method characterized in that the inside of the pipe is moved to sequentially heat the pipe lining material in the longitudinal direction. 2. The hot water hose is wound around a hose reel, a traction rope is attached to the hot water hose or the hot water injection nozzle, and the hot water injection nozzle is wound around the hose reel with the pipe lining material. The pipe lining method according to claim 1, wherein the pipe lining is moved inside the pipe. 3. The pipe lining method according to claim 1, wherein the plurality of hot water injection nozzles are detachably attached to the hot water hose at appropriate intervals. 4. The hot water injection nozzle formed in the hot water injection nozzle is opened at a position higher than a position of the hot water hose provided at a bottom of the pipe lining material. 4. The pipe lining method according to 2 or 3. 5. The hot water injected from the hot water injection nozzle is discharged to the outside of the pipe lining material and reheated, and the reheated hot water is supplied to the hot water hose and hot water is injected from the hot water injection nozzle. The pipe lining method according to claim 1, wherein the step of repeating is performed. 6. The pipe lining method according to claim 1, wherein a buoyant body is attached near the hot water injection nozzle or the hot water injection nozzle of the hot water hose. 7. The hot water injection angle from the hot water injection nozzle is set at 5 ° to 45 °.
7. The pipe lining method according to any one of claims 5 to 6.