JP2644438B2 - Reversing nozzle, reversing method of pipe lining material, and pipe repair method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversing nozzle, a method for reversing a pipe lining material using the reversing nozzle, and a pipe repair method.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, the pipeline is repaired by lining its inner peripheral surface without excavating the pipeline from the ground. There is a known pipeline repair method.

[0003] That is, in the pipe line repair method, a pipe lining material formed by impregnating a hardening resin into a tubular non-woven fabric whose outer peripheral surface is covered with a highly airtight film is inserted into the pipe line while being inverted by fluid pressure. After that, while pressing the pipe lining material against the inner peripheral surface of the pipe, the pipe lining material is heated or the like to cure the curable resin impregnated therein, thereby lining the inner peripheral surface of the pipe. It is a construction method to apply.

[0004] Incidentally, for inversion of the pipe lining material in such a pipeline repair method, for example, an inversion nozzle 101 as shown in FIG. 14 is used.

That is, in the illustrated example, a reversing nozzle 101 bent at 90 ° elbow is installed at the bottom of the manhole 108, and one end of a pipe lining material 106 is attached to the outer periphery of one end thereof by bending. A lower end opening of a guide tube 107 is attached to the outer periphery of the other end of the reversing nozzle 101.

The unreversed portion of the pipe lining material 106 extends to the ground side through the reversing nozzle 101 and the guide tube 107, and the upper end of the guide tube 107 is fixed to a support frame 111 installed on the ground. ing. One end of a drain hose 110 is connected to the reversing nozzle 101, and the other end of the drain hose 110 is opened above a water tank 137 installed on the ground.

When water is injected into the guide tube 107 from the water injection hose 112, the pipe lining material 106
Is inserted in the direction of the arrow shown in the figure while reversing the inside of the pipeline 113 by water pressure.

[0008]

By the way, in the manhole 108 of a sewer pipe as shown in FIG. 14, the internal diameter d ₁ is generally d ₁ = φ900 mm, whereas
The diameter d ₂ of the inlet is as small as d ₂ = φ600 mm.

Thus, the inversion nozzle 101 is connected to the manhole 1.
08, its length L must be equal to the length of the manhole 108.
Smaller than the diameter d ₂ = φ600 mm of the inlet of the cylinder (L <d
₂ ) Although the length L of the conventional reversing nozzle 101 is set to be at least twice the diameter D (L ≧ 2D), the diameter D ′ of the pipe lining material 106 is D ′ ≦ L.
_{/ 2 <d 2/2 (} = φ300mm) next, after all, φ3
The reversing nozzle 101 could not be used for repairing a pipe having a diameter of 00 mm or more.

Therefore, when repairing a pipe having a diameter of 300 mm or more, a reversing nozzle must be installed on the ground, and a pipe lining material must be attached to the reversing nozzle installed on the ground to invert the pipe. According to this, the length of the portion of the pipe lining material that is not provided for lining (the portion from the pipe to the reversing nozzle through the manhole) becomes long, which is uneconomical. When the value is large, the wasteful cost spent on the pipe lining material was enormous.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a reversing nozzle capable of reversing and inserting a minimum necessary length of a pipe lining into a large-diameter pipe. And a method for reversing a pipe lining material using the reversing nozzle and a pipe repair method.

[0012]

In order to achieve the above-mentioned object, the present invention is set substantially horizontally on the bottom of a manhole,
A cylindrical reversing nozzle to which one end of a pipe lining material is folded and attached to the outer periphery of one end is divided into two chambers by a partition plate having a drain hole, and one of the chambers has an air hose. Is formed in the other chamber, and a discharge port is formed in the other chamber for connecting a drain hose.
It is characterized in that L <2D is set.

Further, the method for reversing a pipe lining material according to the present invention is characterized in that the length L is set to D / 5 <L <2D with respect to the diameter D at the outer periphery of one end of a cylindrical reversing nozzle. One end of the inversion nozzle is folded back, an opening of one end of the guide tube is attached to the outer periphery of the other end of the inversion nozzle, the inversion nozzle is kept in a vertical state, and introduced into the manhole together with the pipe lining material and the guide tube, and the inversion nozzle is installed. It is characterized in that the direction is changed at the bottom of the manhole and this is set substantially horizontally, and fluid pressure is applied to the inside of the pipe lining material to reverse the pipe lining material.

Further, in the pipe line repair method according to the present invention, the inside is divided into two chambers by a partition plate having a drain hole, and one of the chambers has an air inlet for connecting an air hose. Is formed in the other chamber, and one end of a cylindrical reversing nozzle whose length L is set to D / 5 <L <2D with respect to the diameter D is formed in the other chamber. One end of the pipe lining material is folded back and attached to the outer peripheral part, one end opening of the guide tube is attached to the other peripheral part of the other end of the reversing nozzle, and the reversing nozzle is kept in a vertical state while the pipe lining material and the guide tube are in the manhole. Introduced, turned the reversing nozzle at the bottom of the manohole, set it substantially horizontal, applied fluid pressure to the inside of the pipe lining material, inserted the pipe lining material upside down into the pipeline, and turned on the shower hose. After being drawn into the lining material, the other end opening of the guide tube was sealed and compressed air was supplied into the guide tube, the reversing nozzle and the tube lining material, and the tube lining material was pressed against the inner peripheral wall of the pipe line. In the state, hot water is showered from the shower hose, and the pipe lining material is heated with the hot water to cure the thermosetting resin impregnated therein, and the hot water used for heating the pipe lining material is formed in the reversing nozzle. It is characterized in that the waste water is discharged from the drain port.

[0015]

The reversing nozzle according to the present invention is formed into a cylindrical shape.
When this is introduced into the manhole together with the pipe lining material and the guide tube, the reversing nozzle is maintained in a vertical state, so that the diameter D of the reversing nozzle is a size necessary for the reversing nozzle to pass through the manhole inlet. may be any, the diameter D can be set larger to slightly smaller than the minimum diameter d ₂ of the manhole entrance.

Then, the length L of the reversing nozzle that has passed through the manhole entrance is D / 5 <L <2D with respect to the diameter D.
, The direction is easily changed at the bottom of the manhole, and the manhole is set to be substantially horizontal, so that the pipe lining material is inverted.

As described above, since the diameter D of the reversing nozzle according to the present invention can be set to be slightly larger than the diameter d _{2 of the} manhole entrance, it is close to the diameter d ₂ of the manhole entrance. Even for large diameter pipelines
The large-diameter pipe lining material can be inverted and inserted using the reversing nozzle installed in the manhole, and the large-diameter pipe lining material can be extended to the reversing nozzle by installing the reversing nozzle on the ground as in the past. There is no need to perform this operation, and the length of unnecessary unnecessary portions that are not used for lining the pipe lining material is minimized, and a great cost advantage is obtained.

Further, according to the pipeline repair method according to the present invention, which is carried out by using a reversing nozzle whose inside is divided into two chambers by a partition plate formed with a drain hole, a large-diameter pipeline is provided. In addition to performing the repair work using the minimum required pipe lining material without waste, the reversing nozzle pressurizes the hot water supplied from the shower hose and used to heat the pipe lining material with air pressure. The hot water can be sent from one of the chambers to the other chamber through a drain hole, and the hot water can be pushed up to a drain port formed in the other chamber and discharged out of the reversing nozzle. It is possible to form in the upper half, and it is possible to solve the conventional problem that a drain port could not be provided in the lower half of the reversing nozzle due to inversion of the bottom of the manhole.

[0019]

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

FIG. 1 is a longitudinal sectional view of a reversing nozzle 1 according to the present invention. The reversing nozzle 1 is formed in a cylindrical shape, and a screw hole 2 and a circular hole 3 are formed in a part of an outer wall thereof. Inside the hole 3 (the inner peripheral surface of the outer wall), a cylindrical joint 4 in which a screw is engraved on the inner peripheral portion is attached. A resin 5 is provided around the joint 4 to prevent damage to a pipe lining material 6 described later.

Thus, in the reversing nozzle 1 according to the present embodiment, the length L is D / 5 <L <2D with respect to the diameter D.
Is set to

Next, a method of reversing the pipe lining material using the reversing nozzle 1 will be described with reference to FIGS.
2 to 6 are sectional views showing a method of reversing the pipe lining material according to the present invention in the order of steps, and FIG. 6 is an enlarged sectional view of a main part of FIG.

First, as shown in FIG. 2, the reversing nozzle 1 is set substantially horizontally on the ground, and one end of a pipe lining material 6 is attached to the outer periphery of one end of the reversing nozzle 1 by folding it back. One end of the guide tube 7 is attached to the outer periphery of the end. At this time, the unreversed portion of the pipe lining material 6 is inserted into the reversing nozzle 1 and the guide tube 7.
The tube lining material 6 is formed by impregnating a non-woven fabric whose outer peripheral surface is covered with a highly airtight film with a curable resin (a thermosetting resin or a photocurable resin).

Next, as shown in FIG. 3, the reversing nozzle 1 is kept vertical so that the side where the pipe lining material 6 is attached faces down, and is introduced into the manhole 8. At this time, the diameter D of the reversing nozzle 1 is
Should be a size necessary to pass through the entrance of the manhole 8, and this diameter D is set to the minimum diameter d ₂ of the entrance of the manhole 8.
(D <d ₂ ) can be set to be slightly larger than (= φ600 mm).

Then, the reversing nozzle 1 is introduced into the inside of the manhole 8 together with the pipe lining material 6 and the guide tube 7 while maintaining the vertical position as described above, and when it reaches the bottom of the manhole 8, As shown in FIG. 4, the reversing nozzle 1 is turned 90 ° and set substantially horizontally. At this time, since the length L of the reversing nozzle 1 is set to D / 5 <L <2D with respect to the diameter D as described above, the direction of the reversing nozzle 1 at the bottom of the manhole 8 is easily changed. You.

When the reversing nozzle 1 is set substantially horizontally at the bottom of the manhole 8 as described above, the guide tube 7 is positioned near the mounting portion to the reversing nozzle 1 as shown in FIGS. Is bent at a substantially right angle, and the pipe lining material 6
The non-reversed portion extends to the ground through the reversing nozzle 1 and the guide tube 7. In this state, as shown in detail in FIG. 6, the end (metal fitting 9a) of the air hose 9 is screwed into the screw hole 2 provided in the reversing nozzle 1 and the air hose 9 is attached to the reversing nozzle 1. With
The joint 4 has an end (a metal fitting 10) of a drain hose 10 attached thereto.
a) and the drain hose 10 is attached to the reversing nozzle 1 by screwing. The air hose 9 is connected to a compressor (not shown), and the drain hose 10 is connected to a heating device such as a boiler or a drain pump.

As described above, the air hose 9 and the drain hose 1
When the water is injected from the upper end opening of the guide tube 7 supported by the support frame 11 on the ground by the water injection hose 12 as shown in FIG. Receiving pipe 1
3 is inserted while being inverted. At this time, the valve 14 provided on the air hose 9 and the drain hose 10
Are closed (see FIG. 6).

Alternatively, although not shown, the guide tube 7
When the compressed air is supplied from the compressor (not shown) into the reversing nozzle 1 through the air hose 9, the pipe lining material 6 receives the air pressure and the pipe 13 is inverted and inserted.
In this case as well, the valve 15 provided on the drain hose 10 is closed.

When the inverted insertion of the pipe lining material 6 is completed over the entire length of the pipe 13 as described above, the pipe lining material 6 is heated while being pressed against the inner peripheral wall of the pipe 13. If the curable resin impregnated in the pipe lining material 6 is hardened, the pipe 13 is lined with the hardened pipe lining material 6 and repaired.

As described above, the reversing nozzle 1 according to the present embodiment has the diameter D of the inlet diameter d of the manhole 8 as described above.
₂ (= φ600 mm) can be set to a value slightly larger (a value necessary for keeping the reversing nozzle 1 in a vertical state and passing through the entrance of the manhole 8). The reversing nozzle 1 installed in the manhole 8 even with a large diameter close to d ₂
Can be used to reversely insert the large-diameter pipe lining material 6 into the pipe line 13, and it is necessary to install a reversing nozzle on the ground and extend the large-diameter pipe lining material to the reversing nozzle as in the conventional case. As a result, it is possible to minimize the length of the unnecessary portion that is not used for lining the pipe lining material 6, thereby obtaining a great cost advantage.

In the above embodiment, since the straight guide tube 7 is attached to the reversing nozzle 1, when the reversing nozzle 1 is set substantially horizontally at the bottom of the manhole 8, as shown in FIG. In order to be bent at a substantially right angle, a bent portion 7
a is formed, and as shown in FIG.
Is attached to the reversing nozzle 1 if the guide tube 17 is bent in a substantially right angle in advance, and even if the reversing nozzle 1 is set substantially horizontally at the bottom of the manhole 8, the guide tube 1
No bends occur in 7.

On the other hand, the bent portion 7 of the guide tube 7
An inversion method shown in FIG. 8 that effectively uses “a” can be considered.

FIG. 8 is a sectional view showing another inversion method. In this inversion method, after water is injected from the upper end opening of the guide tube 7, the compressor 16 is driven and compressed air is supplied to the air hose. 9 and is supplied into the reversing nozzle 1. Then, in the reversing nozzle 1 and the pipe lining material 6, an air chamber S which is a closed space defined by the bent portion 7a of the guide tube 7 functioning as a weir and water is formed.

When the compressed air is continuously supplied from the compressor 16 to the air chamber S, the pipe lining material 6 attached to the reversing nozzle 1 receives the air pressure and is successively reversed. At this time, P = γ · Δh between the internal pressure P of the air chamber S and the head difference Δh of water.
(Γ is the specific weight of water).

Next, a reversing nozzle according to another embodiment of the present invention will be described with reference to FIGS. 9 is a side sectional view of a reversing nozzle according to another embodiment, and FIG.
FIG. 11 is a cutaway perspective view of the reversing nozzle.

The reversing nozzle 21 according to the present embodiment is also formed into a cylindrical shape similarly to the reversing nozzle 1 according to the above embodiment, and the length L is set to D / 5 <L <2D with respect to the diameter D. However, the inside thereof is divided into two chambers S ₁ and S
_It is divided into _two .

The partition plate 28 narrows downward.
It has one side plate 28a and one bottom plate 28b, and a plurality of drain holes 29 are formed in the bottom plate 28b. At the top of the outer wall of the reversing nozzle 21, an air inlet 30 opening to _one chamber S ₁ is formed.
The left and right of the top half of the first outer wall, the two water outlet 31 which opens into the other chamber S ₂ is formed.

Here, the reversing nozzle 2 according to the present embodiment
The pipe repair method using No. 1 will be described with reference to FIGS. FIG. 12 is a sectional view showing a pipeline repair method according to the present invention, and FIG. 13 is a sectional view taken along line BB of FIG.

In the pipe repair method according to the present invention, the same method as described above (FIGS.
The pipe lining material 6 is connected to the pipe 1 by the inversion method shown in FIG.
3 is inverted. In addition, the pipe lining material 6 is
When the shower hose 32 is inserted upside down in FIG.
As shown in (1), it is drawn into the pipe lining material 6, the reversing nozzle 21 and the guide tube 7.

When the reverse insertion of the pipe lining material 6 is completed over the entire length of the pipe 13, the upper end opening of the guide tube 7 is closed by the cap 33. The shower hose 32 is hermetically penetrated through the cap 33, and an air hose 35 and a pressure gauge 36 derived from a compressor 34 are attached to the cap 33.

The air hose 9 is connected to the air inlet 30 formed in the reversing nozzle 21, and the drain port 31 is formed in the reversing nozzle 21.
Is connected to one end of a drain hose 10. And
The other end of the drain hose 10 opens above a water tank 37 installed on the ground.

The water tank 37 includes a pipe 38 and a pump 39.
Is connected to the boiler 40 through the
Is connected to the shower hose 32.

When the compressor 34 is driven to supply compressed air into the guide tube 7 through the air hose 35, the pipe lining material 6 is expanded by receiving air pressure, as shown in FIG. , Is pressed against and adhered to the inner peripheral wall of the conduit 13.

On the other hand, when the pump 39 and the boiler 40 are driven to flow hot water heated by the boiler 40 into the shower hose 32, as shown in FIG. The gas is jetted from the injection port and showered toward the pipe lining material 6, and the pipe lining material 6 is heated by the hot water.

Incidentally, the hot water supplied to the heating of the pipe lining material 6 falls and falls into the pipe lining material 6 and the reversing nozzle 21.
The hot water in the chamber S ₁ of the reversing nozzle 21 is discharged from the drain port 29 formed in the partition plate 28 to the other chamber S ₂ because the hot water receives air pressure.
The hot water is pushed up in the chamber S ₂ and discharged out of the reversing nozzle 21 through the drain port 31 and the drain hose 10.

Then, the warm water discharged to the outside of the reversing nozzle 21 is returned to the water tank 37 through the drain hose 10 and is returned to the water tank 3.
The hot water returned to 7 is sent to a boiler 40 through a pipe 38 by a pump 39, is heated again by the boiler 40, and then flows through a shower hose 32 again to be used for heating the pipe lining material 6.

By circulating the warm water as described above, the pipe lining material 6 is continuously heated by the hot water showered from the shower hose 32, and this heating cures the thermosetting resin impregnated in the pipe lining material 6. Then, the pipe line 13 is lined with the hardened pipe lining material 6 and repaired.

[0048] In Thus, according to the present invention method using the inverted nozzle 21, due to the flowing into the chamber S ₂ of inverted nozzle 21 hot water to discharge it pushes the air pressure, on the reversing nozzles 21 A drain port 31 can be formed in the half part. As shown in FIG. 13, since the lower half of the reversing nozzle 21 is fitted into the concave portion 41a of the invert 41, hot water is supplied from the lower half of the reversing nozzle 21. Can be discharged from the upper half of the reversing nozzle 21 even when the water cannot be discharged.

In the method of the present invention for reversing the pipe lining material 6 using the reversing nozzle 21, the method for reversing the pipe lining material 6 using the reversing nozzle 1 according to the above embodiment (see FIGS. 2 to 6). It is needless to say that the same effect as in the inversion method shown) can be obtained.

[0050]

As is apparent from the above description, according to the present invention, it is possible to reversely insert a pipe lining of a necessary minimum length even in a large-diameter pipe line. There is no need to install a nozzle on the ground and extend the large-diameter pipe lining material to the reversing nozzle, and minimize the length of unnecessary unnecessary parts that are not used for lining the pipe lining material, thereby reducing costs. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a reversing nozzle according to a first embodiment of the present invention.

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

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

FIG. 4 is a cross-sectional view illustrating a method of reversing a pipe lining material according to the present invention.

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

6 is a cross-sectional view (an enlarged cross-sectional view of a main part in FIG. 5) showing a method for reversing a pipe lining material according to the present invention.

FIG. 7 is a sectional view showing another embodiment of the guide tube.

FIG. 8 is a cross-sectional view showing another embodiment of the method for reversing the pipe lining material.

FIG. 9 is a side sectional view of a reversing nozzle according to a second embodiment of the present invention.

FIG. 10 is a sectional view taken along line AA of FIG. 9;

FIG. 11 is a cutaway perspective view of a reversing nozzle according to a second embodiment of the present invention.

FIG. 12 is a sectional view showing a pipeline repair method according to the present invention.

FIG. 13 is a sectional view taken along line BB of FIG. 12;

FIG. 14 is a cross-sectional view showing a conventional method of reversing a pipe lining material using a reversing nozzle.

[Explanation of symbols]

1, 21 reversing nozzle 2 screw hole 4 joint 6 pipe lining material 7, 17 guide tube 7a, 17a bent portion (weir) 8 manhole 9 air hose 10 drain hose 13 pipeline 28 partition plate 29 drain hole 30 air inlet 31 drain mouth 32 shower hose D length of diameter L inversion nozzles inverted nozzle S air chamber S _1, S ₂ rooms

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Pref. 56) References JP-A-3-47730 (JP, A)

Claims (7)

(57) [Claims] Claims 1. A manhole is set substantially horizontally on the bottom of a manhole,
A cylindrical reversing nozzle in which one end of a pipe lining material is attached to an outer peripheral portion of one end thereof by folding, and the interior is divided into two chambers by a partition plate having a drain hole.
It is divided and one room is for connecting an air hose.
An air inlet is formed, and a drain hose is connected to the other chamber.
A reversing nozzle characterized in that a discharge port for connection is formed, and a length L thereof is set to D / 5 <L <2D with respect to a diameter D. 2. The length L is D / 5 <L <2 with respect to the diameter D.
One end of the pipe lining material is folded back around one end of the cylindrical reversing nozzle set at D, and one end opening of the guide tube is attached to the other end of the reversing nozzle to keep the reversing nozzle in a vertical state. Then, the pipe lining material and the guide tube are introduced into the manhole together with the guide tube, the reversing nozzle is turned around at the bottom of the manhole, and set substantially horizontally, and fluid pressure is applied inside the pipe lining material to remove the pipe lining material. A method for inverting a pipe lining material, characterized by inverting the pipe lining material. 3. The method for inverting a pipe lining material according to claim 2 , wherein said guide tube is bent at a substantially right angle, and one end opening thereof is attached to said inversion nozzle. 4. The method according to claim 2 , wherein the guide tube is bent at a substantially right angle. 5. The pipe according to claim 2 , wherein after the reversing nozzle is set substantially horizontally on the bottom of the manhole, an air hose and a drain hose are attached to the reversing nozzle by a joint provided on the reversing nozzle. How to reverse the lining material. 6. The guide tube is bent substantially at a right angle, one end opening is attached to the reversing nozzle, and the bent portion of the guide tube is used as a weir. to form an air chamber partitioned, inversion method according to claim 2 or 4, wherein the tubular lining material by supplying compressed air to the air chamber, characterized in that reversing the tubular liner at a pressure of the compressed air. 7. The interior is divided into two chambers by a partition plate formed with a drain hole, an air inlet for connecting an air hose is formed in one chamber, and a drain is formed in the other chamber. A discharge port for connecting a hose is formed, and one end of a pipe lining material is folded back around one end of a cylindrical reversing nozzle whose length L is set to D / 5 <L <2D with respect to the diameter D. Attach one end opening of the guide tube to the outer periphery of the other end of the reversing nozzle, introduce the reversing nozzle into the manhole together with the pipe lining material and the guide tube while maintaining the vertical state, and place the reversing nozzle in the manohole bottom at the bottom. Then, the pipe is set to be substantially horizontal, and a fluid pressure is applied to the inside of the pipe lining material to reversely insert the pipe lining material into the pipe line and draw the shower hose into the pipe lining material. The other end opening of the guide tube is sealed and compressed air is supplied into the guide tube, the reversing nozzle and the pipe lining material, and hot water is supplied from the shower hose while the pipe lining material is pressed against the inner peripheral wall of the pipe. While showering, the pipe lining material is heated with hot water to cure the thermosetting resin impregnated therein, and the hot water used for heating the pipe lining material is discharged from the drain port formed in the reversing nozzle. A pipe repair method characterized by the following.