JPH0829562B2 - 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 pipeline repairing method for repairing an aged pipeline by lining the inner peripheral surface of the pipeline.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is deteriorated, there is a method of repairing the pipeline by lining the inner peripheral surface of the pipeline without excavating the pipeline. Although known, an example of the construction method will be described with reference to FIGS. 5 and 6.

That is, FIGS. 5 and 6 are cross-sectional views showing a conventional pipe line repairing method in the order of steps, and when the pipe line 6 is repaired, as shown in FIG. One end (upper end) of the nozzle liner 3 is attached to the outer periphery, an L-shaped reversing nozzle 5 is attached to the other end (lower end) of the nozzle liner 3, and one end of the pipe lining material 7 is attached to the reversing nozzle 5. Water is injected from the water injection hose 9 into the folded back portion of the pipe lining material 7 which is mounted by folding back.

Then, a part of the pipe lining material 7 is inverted and inserted into the pipe line 6 by the pressure of water. afterwards,
When the compressor 13 is driven and compressed air is supplied into the pipe lining material 7 through the air hose 12, the pipe lining material 7 is filled with compressed air in the closed space S1.
Is formed, the pipe lining material 7 is sequentially inserted in the pipe line 6 in the direction of the arrow in the drawing while receiving the air pressure in the closed space S1 and being inverted.

When the inversion insertion of the pipe lining material 7 into the pipe line 6 is completed, an upper lid 14 is attached to the upper surface of the upper inversion nozzle 1 as shown in FIG. When S is formed and compressed air is supplied from the compressor 19 into the closed space S through the air pipe 20, the pipe lining material 7 is kept at a constant internal pressure, and the hot water hose 21 drawn into the pipe lining material 7 keeps the internal pressure constant. Receive showering with warm water. Then, the pipe lining material 7 is heated by hot water, the thermosetting resin impregnated in the pipe lining material 7 is cured, and the inner peripheral surface of the pipe line 6 is repaired by the cured pipe lining material 7.

[0006]

By the way, in the above-mentioned conventional pipe line repairing method, as shown in FIG. 5, a part of the air hose 12 is fixed to a predetermined position of the pipe lining material 7 by a fixing tape or the like (before inversion). Since it was fixed at a predetermined position on the outer circumference of the pipe lining material 7, when the air hose 12 was pulled and removed after the lining was finished, there was a problem that a fixing tape or the like remained on the inner peripheral surface of the pipe lining material 7.

Further, in order to determine the position at which the air hose 12 should be attached to the outer circumference of the pipe lining material 7 before reversing, accurate length measurement and the like are required, which is not easy in practice and requires a lot of time. Was there.

The present invention has been made in view of the above problems, and the object thereof is not to fix the air hose to the pipe lining material, but to easily insert the air hose into the pipe lining material. It is an object of the present invention to provide a pipeline repairing method capable of supplying compressed air into the pipe lining material and preventing a fixing tape or the like from remaining on the inner peripheral surface of the pipe lining material after the lining is completed.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is designed so that after a part of a pipe lining material impregnated with a curable resin is reversely inserted into a pipe line by hydraulic pressure, the inside of the pipe lining material is Compressed air is supplied to the pipe lining material by inverting and inserting the pipe lining material into the pipe line by the pressure of the compressed air, and the curability of the pipe lining material impregnated into the pipe lining material is maintained while the internal pressure of the inverted pipe lining material is kept constant. In a method for repairing a conduit for curing a resin, compressed air is supplied into the pipe lining material by using an air hose having a reverse injection nozzle attached to its tip. .

[0010]

According to the present invention, after the pipe lining material is inverted by water pressure and a part of the pipe lining material is inserted into the pipe line, the reverse injection is installed in the water in the pipe lining material and is attached to the tip of the air hose. When the nozzle is thrown in and the compressed air is jetted from the reverse jet nozzle, the reverse jet nozzle receives the reaction force from the compressed air and goes deep into the water inside the pipe lining material to move the air hose to the pipe lining material. Pull in.

The compressed air jetted from the reverse jet nozzle acts on the pipe lining material to invert the pipe lining material by its pressure, and the pipe lining material is sequentially inserted into the pipe line while being inverted.

Therefore, according to the present invention, it is not necessary to fix the air hose to the pipe lining material, and the air hose can be easily inserted into the pipe lining material to supply compressed air into the pipe lining material. In addition, the fixing tape and the like do not remain on the inner peripheral surface of the pipe lining material after the lining is completed.

[0013]

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

FIGS. 1 to 3 are sectional views showing a pipe repairing method according to the present invention in the order of steps, and FIG. 4 is a sectional view of a fluid injection nozzle.

In FIG. 1, reference numeral 1 denotes a cylindrical upper reversing nozzle set at a relatively lower position (lower than the conventional one) from the ground, and an auxiliary guide means is provided on the lower outer periphery of the upper reversing nozzle 1. A flexible auxiliary guide liner 2 and a tubular nozzle liner 3 are attached at respective ends.

The nozzle liner 3 is suspended in the manhole 4 as shown in the drawing, and one end of an L-shaped reversing nozzle 5 is attached to the lower end of the nozzle liner 3 toward the pipe line 6 of the reversing nozzle 5. One end of the flexible pipe lining material 7 is folded back and attached to the other end opened. still,
The pipe lining material 7 is polyester, polypropylene,
It is constructed by impregnating a tubular non-woven fabric such as acrylic with a thermosetting resin, and the non-inverted portion thereof extends through the inversion nozzle 5, nozzle liner 3, upper inversion nozzle 1 and auxiliary guide liner 2 to the outside thereof. There is. A hot water discharge hose 8 is branched from the reversing nozzle 5, and the hot water discharge hose 8 extends through the manhole 4 to the ground.

When the pipe lining material 1 is inverted and inserted into the pipe line 6, the auxiliary guide liner 2 passes through the inside of the upper reversing nozzle 1 and rises above it as shown in FIG. Water is injected by the water injection hose 9 from the upper end opening.

Then, as shown in the figure, the water reaches the auxiliary guide liner 2 above the upper reversing nozzle 1, the water level is kept high, and the pipe lining material 7 is reversed by a sufficiently high water pressure, and a part thereof Is inserted into the conduit 6 as shown in FIG.

Next, as shown in FIG. 2, the upper portion of the inverted pipe lining material 7 facing the manhole 4 is pressed by a long bar-shaped holding bar 10 in the direction perpendicular to the paper surface of FIG. Transform it. Then, the reverse injection nozzle 11 is provided at the tip.
The compressed air supplied by the compressor 13 is flown into the air hose 12 by putting the air hose 12 attached with the water into the water, and the compressed air is supplied to the reverse injection nozzle 1
Reverse injection from 1.

The structure of the reverse injection nozzle 11 will now be described with reference to FIG. 4. The reverse injection nozzle 11 has a disc-shaped lid member 11b on the inner circumference of the opening of the cup-shaped main body 11a.
It is configured by screwing. A connection port 11c is provided at the center of the lid member 11b so as to project therefrom.
One end of the air hose 12 is connected to c.
A plurality of injection holes 11d are formed around the connection port 11c of the lid member 11b.

Thus, as described above, the compressor 13
4 is driven to flow compressed air in the air hose 12 in the direction of the arrow in FIG. 4, the direction of the compressed air is changed by 180 ° by the main body 11a in the reverse injection nozzle 11, and the compressed air is formed in the lid member 11b. Reverse injection is performed from the injection hole 11d. Then, by the reverse injection of the compressed air, the reverse injection nozzle 11 receives a reaction force from the compressed air to obtain a propulsive force in the same direction as the supply direction of the compressed air, and the compressed air is supplied into the water in the pipe lining material 7. Direction (rightward in FIG. 2), the air hose 12 is drawn into the pipe lining material 7.

At the same time, when compressed air is jetted from the reverse jet nozzle 11, the compressed air forms an enclosed space S1 filled with the compressed air in the upper part of the pipe lining material 7.

When the compressed air is jetted from the reverse jet nozzle 11 and the compressed air is continuously supplied to the closed space S1 as described above, the pipe lining material 7 receives the pressure of the compressed air and is successively inverted. Meanwhile, the pipe 6 is inserted in the direction of the arrow (rightward) in FIG. At this time, the internal pressure (reversal pressure) of the closed space S1 can be increased up to a value γH (γ is a specific weight of water) corresponding to the hydraulic head H shown in the figure. Since the auxiliary guide liner 2 is started up and the water level is raised up to the portion of the auxiliary guide liner 2, a sufficiently large hydraulic head H is secured despite the upper reversing nozzle 1 being set at the low position as described above. Therefore, the internal pressure of the closed space S1 can be increased to a pressure sufficient for reversing the pipe lining material 7.

When the pipe lining material 7 has been inverted and inserted into the pipe line 6 as described above, the water is discharged, and then, as shown in FIG.
As shown in FIG. 3, the auxiliary guide liner 2 is hung inside the nozzle liner 3, and the upper lid 14 is attached to the upper surface of the upper reversing nozzle 1 by the G clamp 15. still,
A cylindrical guide cylinder 16 is provided through the upper lid 14, a pressure gauge 17 and a safety valve 18 are attached, and
An air pipe 20 leading from the compressor 19 is connected.

When the upper surface of the upper reversing nozzle 1 is closed with the upper lid 14 as described above, the upper lid 14 is sealed inside by the upper reversing nozzle 1, the nozzle liner 3, the reversing nozzle 5 and the pipe lining material 7. Although the space S is formed, when the pipe lining material 7 is inverted and inserted into the pipe line 6 as described above, the hot water hose 21 having one end attached to the inverted end of the pipe lining material 7 is attached to the upper lid 14. It penetrates through the guide cylinder 16 provided through and is drawn into the closed space S. still,
A plurality of injection holes 22 are bored in the portion of the hot water hose 21 that is drawn into the pipe lining material 7, and a rope 24 formed by attaching a plurality of buoyant bodies 23 to the outer circumference thereof is spirally wound. It has been turned.

By the way, a portion of the hot water hose 21 which penetrates the guide cylinder 16 is hermetically sealed by a flexible sealing tube 25. That is, the hot water hose 21 penetrates through the sealed tube 25, and one end (lower end) of the sealed tube 25 is attached to the outer circumference of the hot water hose 21. Further, the portion of the closed tube 25 that faces the outside of the closed space S is folded back outward, and its end is attached to the outer periphery of the guide cylinder 16. Therefore, the hot water hose 21
It is airtightly and elastically supported by the guide cylinder 16 via the closed tube 25.

On the other hand, a water tank 26 is installed on the ground, the hot water hose 21 is connected to the lower portion of the water tank 26, and a boiler 27 and a hot water pump 28 are provided in the middle of the hot water hose 21. ing. The hot water discharge hose 8 is opened above the water tank 26 as shown in the figure.

When the compressor 19 is driven and compressed air is supplied into the closed space S through the air pipe 20, the internal pressure of the closed space S increases and the pipe lining material 7 expands by the air pressure. As shown in FIG. 3, the inner peripheral wall of the conduit 6 is pressed. Further, the closed tube 25 receives the air pressure in the closed space S and is inverted to reverse the hot water hose 2
In order to lift 1, even if the somewhat long hot water hose 21 is inserted into the closed space S in a slack state, the slack is removed by lifting the hot water hose 21 as described above, and as shown in FIG. In addition, the hot water hose 21 maintains a tension state in the closed space S. The internal pressure of the closed space S is
Due to the action of the safety valve 18, the value is suppressed below a predetermined value.

Next, the boiler 27 while maintaining the above state.
When the hot water pump 28 is driven, the water in the water tank 26 is supplied to the boiler 27 and is heated to a predetermined temperature by the boiler 27 to become hot water. Then, the hot water flows in the hot water hose 21 in the direction of the arrow shown in the drawing, and jets vigorously from the injection holes 22 formed in the hot water hose 21 toward the inner peripheral wall of the pipe lining material 7. Then, the pipe lining material 7
Receives showering of warm water from the inside, and the thermosetting resin impregnated therein is heated and cured by warm water, and the inner peripheral surface of the pipe 6 is lined with the cured pipe lining material 7 for repair. It

By the way, the warm water which has been used for heating the pipe lining material 7 by the showering as described above drops and collects at the bottom of the pipe lining material 7, as shown in FIG.
The accumulated hot water having a low temperature receives the internal pressure of the closed space S and is pushed out of the closed space S through the hot water discharge hose 8.
It is returned to the water tank 26. As described above, the hot water hose 2
Since a plurality of buoyant bodies 23 are attached to the outer periphery of 1, the hot water hose 21 floats on the hot water accumulated in the bottom portion of the pipe lining material 7, and therefore does not sink into the hot water and the hot water hose 21 The injection hole 22 bored in is exposed above the hot water, and the hot water can be stably ejected. As a result, the pipe lining material 7 is uniformly heated along the length direction and the circumferential direction, and the thermosetting resin impregnated in the pipe lining material 7 is uniformly cured.

The hot water in the water tank 26 is sent to the boiler 27 by the hot water pump 28, heated again to a predetermined temperature by the boiler 27, and used for heating the pipe lining material 7.

In the above, in this embodiment, as described above, the pipe lining material 7 is inverted by water pressure and a part of the pipe lining material 7 is inserted into the pipe line 6, and then air is introduced into the water in the pipe lining material 7. If the reverse jet nozzle 11 attached to the tip of the hose 12 is thrown in and compressed air is jetted from the reverse jet nozzle 11, the reverse jet nozzle 11 receives a reaction force from the compressed air and the inside of the pipe lining material 7 is received. Since the air hose 12 is pulled into the pipe lining material 7 by going deep into the water, it is not necessary to fix the air hose 12 to the pipe lining material 7 as in the conventional case. The compressed air can be easily inserted into the pipe lining material 7 to supply compressed air into the pipe lining material 7, and no fixing tape or the like remains on the inner peripheral surface of the pipe lining material 7 after the lining is completed.

[0033]

As is apparent from the above description, according to the present invention, a part of the pipe lining material impregnated with the curable resin is reversely inserted into the pipe line by hydraulic pressure, and then the pipe lining material is Compressed air is supplied to the pipe lining material by inverting and inserting the pipe lining material into the pipe line by the pressure of the compressed air, and the curability of the pipe lining material impregnated into the pipe lining material is maintained while the internal pressure of the inverted pipe lining material is kept constant. In the method for repairing the conduit, which is designed to cure the resin, the compressed air is supplied to the inside of the pipe lining material by using the air hose having the reverse injection nozzle attached to the tip thereof. It is not necessary to fix it to the lining material, and the air hose can be easily inserted into the pipe lining material to supply compressed air into the pipe lining material. Fixing tape or the like to the inner circumferential surface of the ingredients can not be left.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a pipeline repairing method according to the present invention in the order of steps thereof.

FIG. 2 is a cross-sectional view showing a pipeline repairing method according to the present invention in the order of steps thereof.

3A to 3D are cross-sectional views showing a pipeline repairing method according to the present invention in the order of steps thereof.

FIG. 4 is a cross-sectional view of a reverse injection nozzle.

FIG. 5 is a cross-sectional view showing a conventional pipeline repair method in the order of steps thereof.

FIG. 6 is a cross-sectional view showing a conventional pipeline repair method in the order of steps thereof.

[Explanation of symbols]

 6 Pipe line 7 Pipe lining material 11 Reverse injection nozzle 12 Air hose

Claims (2)

[Claims] 1. A pipe lining material impregnated with a curable resin is partially reversed by hydraulic pressure into a pipe line, and then compressed air is supplied into the pipe lining material to form a pipe at the pressure of the compressed air. In the pipe repairing method, the lining material is reversely inserted into the pipeline, and the curable resin impregnated in the pipe lining material is cured while the internal pressure of the reversely inserted pipe lining material is kept constant. A pipe repairing method, characterized in that compressed air is supplied into the pipe lining material by using an air hose having a reverse injection nozzle attached to its tip. 2. The pipe repairing method according to claim 1, wherein the reverse injection nozzle advances the compressed air in the supply direction of the compressed air by injecting the compressed air in a direction opposite to the supply direction of the compressed air.