JP2554438B2 - Pipeline 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. 8 and 9.

That is, FIGS. 8 and 9 are cross-sectional views showing a conventional pipeline repairing method in the order of steps, and when repairing the pipeline 6, as shown in FIG. 8, the outer circumference of the cylindrical upper reversing nozzle 1 is shown. One end (upper end) of the nozzle liner 3 is attached to
An L-shaped reversing nozzle 5 is attached to the other end (lower end) of the nozzle liner 3, one end of a pipe lining material 7 is folded back and attached to the reversing nozzle 5, and the pipe lining material 7 is folded back. Water is injected from the water injection hose 9 into the portion.

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, and the pipe lining material 7 receives the air pressure in the closed space S1 and is sequentially inserted in the pipe line 6 in the direction of the arrow in the drawing while reversing.

When the inversion insertion of the pipe lining material 7 into the pipe line 6 is completed, the upper lid 14 is attached to the upper surface of the upper reversing 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 case of the above-described conventional pipe repairing method, when the pipe lining material 7 is initially reversed by water pressure and thereafter it is reversed by air pressure,
Since it is necessary to keep the reversing hydraulic head H above the pressure head required for reversing the pipe lining material 7, the upper reversing nozzle 1 must be set at a high position above the ground.

However, when the reversing insertion of the pipe lining material 7 into the pipe line 6 is completed, the upper lid 14 is attached to the upper reversing nozzle 1 to form the closed space S as described above, so that the upper reversing nozzle 1 is Does not need to be set high.

Therefore, it is sufficient that the upper reversing nozzle 1 is set at a high position only when the pipe lining material 7 is reversed and inserted, and the upper reversing nozzle 1 is at a high position even after the reversal insertion of the pipe lining material 7 is completed. If it remains set, there is a problem that workability of setting the hot water hose 21 and pressure control is poor.

Further, as shown in FIG. 10, in the case where the hot water drainage hose 8 for discharging hot water to the outside of the closed space S is drawn into the closed space S, and inside the pipe lining material (not shown). When the hot water accumulated at the bottom is pushed out by the internal pressure of the closed space S, it is necessary to push the hot water up to a high position, so that compressed air of high pressure must be supplied from the compressor 19 into the closed space S. there were.

The present invention has been made in view of the above problems, and an object thereof is to provide a pipeline repairing method capable of improving workability by setting the upper reversing nozzle at a low position. It is in.

[0011]

In order to achieve the above-mentioned object, the present invention provides a pipe lining material, one end of which is connected to an upper reversing nozzle, after being inverted and inserted into a pipe line by hydraulic pressure and / or the pipe lining. A part of the material is reversely inserted into the pipe line by water pressure, and then the remaining part of the pipe lining material is reversely inserted into the pipe line by supplying air pressure to the sealed space sealed with water, and then the pipe lining. In a pipe line repairing method in which a curable resin impregnated in the pipe lining material is cured while the internal pressure of the pipe lining material is kept constant, an auxiliary guide means is attached to the upper reversing nozzle, and a pipe of the pipe lining material is attached. When reversing and inserting into the channel, the auxiliary guide means is used to raise the water level for reversing, and after the reversing and inserting of the pipe lining material into the channel is completed, the auxiliary guide means is opened and the upper reversing is performed. Closing the upper surface of the nozzle in the lid member, characterized in that the internal pressure of the upper reversing by supplying compressed air to the closed space formed in the nozzle pipe liner bag to keep constant.

[0012]

According to the present invention, the upper reversing nozzle is set at a low position, and the water level for reversing is increased by using the auxiliary guide means only when the pipe lining material requiring a high water pressure head is reversed and inserted. Since the auxiliary guide means is opened by removing it from the upper reversing nozzle, workability such as setting of a hot water hose and pressure control at the time of hardening the pipe lining material is improved.

Even when the hot water discharge hose is drawn into the closed space and the hot water accumulated at the bottom of the pipe lining material is pushed out by the internal pressure of the closed space, the upper reversing nozzle is low as described above. Since it is set to the position, the height of the hot water discharge hose is low, and hot water can be sufficiently discharged to the outside of the closed space through the hot water discharge hose without increasing the internal pressure of the closed space.

[0014]

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

1 to 3 are sectional views showing the pipeline repairing method according to the present invention in the order of steps.

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 tube lining material 7 is formed by impregnating a thermosetting resin into a tubular non-woven fabric such as polyester, polypropylene or acrylic whose surface is covered with a film having a high airtightness, and the unreversed portion of the tubular lining material 7 is the reversing nozzle 5 or the nozzle liner. 3,
It extends through these through the upper reversing nozzle 1 and the auxiliary guide liner 2. 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 inserted into the pipe line 6 by reversing, 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
2, the reverse injection nozzle 11 receives thrust from the compressed air and advances in the pipe lining material 7 in the right direction in FIG. 2 to inject the compressed air to generate the pipe lining material 7.
A closed space S1 filled with compressed air is formed therein.

When the compressed air is reversely injected from the reverse injection 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 one after another. While being inverted, the pipe 6 is inserted in the direction of the arrow (rightward) in FIG. Closed space S1 at this time
The internal pressure (reversal pressure) 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, but in this embodiment, the auxiliary guide liner 2 is provided above the upper reversal nozzle 1. Since the water level was raised up to the portion of the auxiliary guide liner 2, a sufficiently large hydraulic head H can be secured despite the upper reversing nozzle 1 being set to the low position as described above, and the closed space can be maintained. The internal pressure of S1 can be increased to a pressure necessary and 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 the pipe 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 inside of the upper lid 14 is sealed 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 is increased and the pipe lining material 7 is expanded 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 keeping 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 used for heating the pipe lining material 7 by the showering as described above drops and collects on 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, the upper reversing nozzle 1 is set at a low position, and only when the pipe lining material 7 which requires a high hydraulic head is reversibly inserted into the pipe line 6, FIG. As shown in 2, the auxiliary guide liner 2
Is raised above the upper reversing nozzle 1 to raise the water level for reversing, and when a high hydraulic head is not required as in the subsequent hardening of the pipe lining material 7, the auxiliary guide liner 2 is drooped as shown in FIG. Attach the top cover 14 to the upper reversing nozzle 1 set to the lower position and set to the lower position, and attach the hot water hose 2
Since 1 is drawn in, workability such as setting of the hot water hose 21 and pressure control in the closed space S is remarkably improved.

Further, as shown in FIG. 10, the hot water discharge hose 8 is drawn into the closed space S, and the hot water accumulated at the bottom of the pipe lining material (not shown) is pushed out by the internal pressure of the closed space S. Even in such a case, if the upper reversing nozzle 1 is set at a low position as in this embodiment, the height of the hot water discharge hose 8 may be low, and the inside of the closed space S may be passed from the compressor 19 through the air pipe 20. The hot water can be sufficiently discharged to the outside of the closed space S through the hot water discharge hose 8 without increasing the pressure of the compressed air supplied to the chamber unnecessarily.

In the above embodiment, the pipe lining material 7 is used.
The example of performing the reverse insertion into the pipeline 6 by using both water pressure and air pressure has been described. However, as shown in FIG. 4, the pipe lining material 7 is not filled in the air pressure but only by the water pressure. It goes without saying that the present invention can be applied to the case where the reverse insertion is performed.

Further, in the above embodiment, the flexible auxiliary guide liner 2 is used as the auxiliary guide means, and when this is unnecessary, the auxiliary guide liner 2 is used as shown in FIG.
I hung it inside the nozzle liner 3,
A similar auxiliary guide liner 2 is attached to the outside of the nozzle liner 3 as shown in FIG. 5, or a nozzle flange 29 to which the auxiliary guide liner 2 is attached is attached to the upper reversing nozzle 1 by a G clamp 30 as shown in FIG. , When the auxiliary guide liner 2 is unnecessary,
The auxiliary guide liner 2 may be hung down to the outside of the nozzle liner 3 as shown by broken lines in FIG.

Alternatively, as shown in FIG. 7, an auxiliary guide container 31 which is disassembled and assembled into two parts is used as an auxiliary guide means, and the auxiliary guide container 31 assembled by the G clamp 32 is also upper part by the G clamp 33. The auxiliary guide container 31 is attached to the upper part of the reversing nozzle 1.
After obtaining a high water level by using, the G clamp 33 may be removed, the auxiliary guide container 31 may be disassembled, and this may be removed from the upper reversing nozzle 1.

[0035]

As is apparent from the above description, according to the present invention, the pipe lining material, one end of which is connected to the upper reversing nozzle, is reversely inserted into the pipe line by hydraulic pressure and / or the pipe lining is inserted. A part of the material is reversely inserted into the pipe line by water pressure, and then the remaining part of the pipe lining material is reversely inserted into the pipe line by supplying air pressure to the sealed space sealed with water, and then the pipe lining. In a pipe line repairing method in which the curable resin impregnated in the pipe lining material is cured while keeping the internal pressure of the pipe material constant, an auxiliary guide means is attached to the upper reversing nozzle, and a pipe of the pipe lining material is attached. At the time of reversal insertion into the channel, the water level for reversal is increased by using the auxiliary guide means, and after the reversal insertion of the pipe lining material into the channel is completed, the auxiliary guide means is opened to release the upper reversing nose. The upper surface of the upper reversing nozzle can be set to a lower position because the upper surface of the tube is covered with a lid and compressed air is supplied to the closed space formed inside the upper reversing nozzle to keep the internal pressure of the pipe lining material constant. The effect that the workability can be improved is obtained.

[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 sectional view showing a pipeline repairing method according to a modified embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing another embodiment of the auxiliary guide means.

FIG. 6 is a partial cross-sectional view showing another embodiment of the auxiliary guide means.

FIG. 7 is a partial perspective view showing another embodiment of the auxiliary guide means.

FIG. 8 is a cross-sectional view showing a conventional pipeline repair method in the order of steps thereof.

FIG. 9 is a cross-sectional view showing a conventional pipeline repair method in the order of steps.

FIG. 10 is a cross-sectional view showing an example in which a hot water hose is drawn into a closed space.

[Explanation of symbols]

 1 Upper Reversing Nozzle 2 Auxiliary Guide Liner (Auxiliary Guide Means) 6 Pipeline 7 Pipe Lining Material 31 Auxiliary Guide Container (Auxiliary Guide Means)

Claims (3)

(57) [Claims] 1. A pipe lining material, one end of which is connected to an upper reversing nozzle, is reversely inserted into a pipeline by hydraulic pressure, or / or a part of the pipe lining material is reversely inserted into the pipeline by hydraulic pressure, Subsequently, the remaining portion of the pipe lining material is inverted and inserted into the pipe line by supplying air pressure to the sealed space sealed with water, and then the pipe lining material is fixed to the pipe lining material while keeping the internal pressure of the pipe lining material constant. In a conduit repairing method for curing the impregnated curable resin, an auxiliary guide means is attached to the upper reversing nozzle, and the auxiliary guide means is used to reverse when inserting the pipe lining material into the conduit. After the water level has been increased and the pipe lining material has been inverted and inserted into the pipe, the auxiliary guide means is opened to close the upper surface of the upper reversal nozzle with a lid member, and the shape is formed in the upper reversal nozzle. Conduit repair method, wherein a compressed air to the closed space and to keep a constant internal pressure of the supplied pipe liner bag to be. 2. The auxiliary guide means is composed of a flexible auxiliary guide liner, and the auxiliary guide liner is hung down after the inversion insertion of the pipe lining material into the pipe line is completed. The pipeline repair method according to claim 1. 3. The auxiliary guide means is composed of an auxiliary guide container which is divided into two parts so that the auxiliary guide container can be disassembled and assembled, and the auxiliary guide container is disassembled after the reverse insertion of the pipe lining material into the pipeline is completed. The pipe repairing method according to claim 1, wherein the pipe repairing method is carried out and removed.