JPH09123279A - Method and device for repairing existing pipeline and lining material for repairing existing pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the construction period for repairing an existing pipeline and to reduce the construction cost by supplying compressed air into lining material to press the lining material on the inner face of the existing pipe and thereafter supplying heated compressed air into the lining material to harden the lining material SOLUTION: The tip 1a of lining material 1 is blocked up by a stopper 22a having a pore and also compressed air is supplied from the other end 1b into the lining material 1. The lining material 1 is spread and pressed along the inner face 13a of an existing pipeline 13. After the lining material 1 is spread and pressed on the inner face 13a of the existing pipeline 13, a heater 22 provided on the way of an air supply pipe 20 is operated and the compressed air is changed over to the heated air sent from an air force-feeder 21, e.g. compressed air heated at 70-100 deg.C is supplied into the lining material 1. Thermosetting resin 4 in the lining material 1 is cured by the heated compressed air and the inner face 13a of the existing pipeline 13 is covered with the cured lining material 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing method for an existing pipeline such as a sewer pipe, an existing pipeline repairing device, and an existing pipeline repairing lining material.

[0002]

2. Description of the Related Art Generally, fume pipes, ceramic pipes and the like are widely used as sewer pipes buried underground. The inner surfaces of these pipes are corroded by hydrogen sulfide and other corrosive gases and deposits due to long-term use, and are deteriorated to reduce the pipe thickness and reduce the strength. Also, due to ground pressure or ground subsidence, the seam between pipes may shift and a gap may be created,
A crack etc. occurs in a part of the pipeline due to the overloaded load,
Groundwater or the like may infiltrate into the pipeline from this portion, or running water or the like flowing in the pipeline may leak into the ground. Due to the infiltration or leakage of groundwater or the like into the pipeline, the sediment around the pipeline may flow out to form a hollow portion on the rear surface of the pipeline and cause a road surface depression.

As a countermeasure against this, the inside of the existing pipeline that is buried in the ground to be repaired is cleaned with a pipe cleaning car or the like, and then wound or wound in a flat shape on a lining material supply device provided on the ground. An uncured tubular lining material containing a photo-curable resin, a thermosetting resin or a thermoplastic resin, which is folded and laminated, and a pulling rope connected to the tip of the lining rope is passed from one manhole into the existing pipeline and the other The lining material accommodated in the lining material supply device is drawn into and introduced into the existing pipeline by being pulled by the towing device provided on the ground through the manhole.

Then, the lining material is pressed along the inner surface of the conduit by supplying compressed air or the like, and then the curable resin is cured by irradiation with an ultraviolet irradiation device, and the inner surface of the conduit is covered with the lining material. The repair method has been developed.

[0005]

According to the above-mentioned method for repairing an existing pipeline, since a resin lining layer is formed on the inner surface of the pipeline, a pipeline or a crack having a thin wall due to erosion or the like is generated. Even in the case of the generated pipeline, a great improvement in strength can be obtained, and it is possible to prevent the infiltration of groundwater and the like into the pipeline through the cracks and the leakage of water from the pipeline.

However, in a state where the lining material is expanded by the supply of compressed air and pressed against the inner surface of the pipeline, the work of hardening the lining material by moving the large-diameter ultraviolet irradiation device in the lining material is complicated. Therefore, there is a problem that the construction period is prolonged and the construction cost rises.

Therefore, an object of the present invention is to repair an existing pipeline by shortening the construction period and reducing the construction cost by simplifying the construction, and a method of repairing an existing pipeline,
An object is to provide a device for repairing an existing pipeline and a lining material for repairing an existing pipeline.

[0008]

A method for repairing an existing pipeline according to the present invention which achieves the above object is to introduce an uncured tubular lining material containing a thermosetting resin into the existing pipeline and to perform lining. In the repairing method of the existing pipeline, in which the lining material is pressed against the existing pipeline inner surface by the compressed air supplied into the material, the thermosetting resin is heat-cured to coat the existing pipeline inner surface with the cured lining material. A step of supplying compressed air into the lining material introduced into the existing pipeline to press the lining material against the inner surface of the existing pipeline, and replacing the compressed air supplied into the lining material with heated compressed air. It is characterized in that it has a step of supplying it inside to cure the lining material, and the existing pipeline repair device is an uncured tubular shape containing the thermosetting resin introduced into the existing pipeline. La In the existing pipeline repairing device, the thermosetting resin is heat-cured while the lining material is pressed against the inner surface of the existing pipeline by compressed air supplied into the lining material, and the inner surface of the existing pipeline is covered with the cured lining material. , An air hose whose proximal end is connected to the pneumatic pumping device and whose distal end is introduced into the lining material in the existing pipeline and whose distal end is blocked, and an air hose distal end which movably holds the air hose distal end in the pipeline. A pair of disc-shaped holding members that are spaced apart from each other, and an injection nozzle and an air hose tip that open at the tip of the air hose that ejects compressed air supplied from the air pump between the pair of holding members in the pipeline. The present invention is characterized in that the lining material for repairing the existing pipeline is an uncured tube containing a thermosetting resin in the existing pipeline. Reinforce the lining material that introduces the lining material and heat-cures the thermosetting resin while pressing the lining material against the inner surface of the existing pipeline with compressed air supplied into the lining material to cover the inner surface of the existing pipeline. It is characterized by having a base knitted into a tubular shape capable of extending in the circumferential direction a fiber bundle made of fibers and a resin layer made of an uncured thermosetting resin impregnated in the base.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The method for repairing an existing pipeline according to the present invention will be described below with reference to an embodiment of an existing pipeline repair device and an existing pipeline repair lining material.

The lining material 1 has one or more layers of a tubular base made of reinforcing fibers such as glass fibers and polyester fibers as shown in the partially broken explanatory view of the lining material for covering the inner surface of the existing pipeline in FIG. In the present embodiment, a resin layer formed by impregnating two layers of base materials 2 and 3 with an uncured thermosetting resin 4, for example, an unsaturated polyester resin, and the inner and outer surfaces of the resin layer 5 are respectively formed. It has an inner thin film 6 and an outer thin film 7 such as a plastic thin film for covering, for example a polyethylene film.

The base materials 2 and 3 made of reinforcing fibers are, for example, in the form of a cylinder in which a plurality of fiber bundles inclined with respect to the circumferential direction cross each other and are knitted, and a pressure fluid in the lining material 1, For example, when compressed air is supplied, the lining material 1 is formed so as to extend in the circumferential direction and deform according to the shape of the inner surface of the pipe to come into close contact with the inner surface of the pipe.

Next, the lining material 1 thus formed
The existing pipe repair method and repair device will be explained.

In FIG. 2, reference numerals 11 and 12 are manholes, and reference numeral 13 is an existing pipeline which is buried in the ground and which requires repair, such as a fume pipe and a ceramic pipe.

The inner surface 13a of the existing pipeline 13 is deteriorated by being exposed to hydrogen sulfide or other corrosive gases due to long-term use, and is eroded to reduce the thickness of the pipe to reduce its strength, ground pressure or vibration. There are cases where cracks have occurred due to factors such as the above.

To repair the existing pipeline 13, first, as shown in FIG. 3, high-pressure water is sprayed onto the inner surface 13a of the pipeline 13 by the inside cleaning wheel 15 or the like to clean the pipeline inner surface 13a, and then the lining material 1 is used. Of the pipe line 1 without making the lining material 1 scratched by the pipe line inner surface 13a.
4 and a sectional view taken along the line A-A in FIG. 4 to introduce the resin sheet 16 of vinyl chloride or the like underneath the inner surface 13a of the pipe, and the upper surface of the resin sheet 16 slides smoothly. Apply a lubricant to

The lining material supplying device 17 provided on the ground is flatly folded and wound around the drum 17a,
Alternatively, the tip 1a of the lining material 1 that is folded and laminated
The tow rope 18 connected to the manhole 1 is introduced from one manhole 11 and is passed through the existing pipeline 13 to the other manhole 1.
2 is pulled by a towing device 19 provided on the ground.

In accordance with the pulling of the pulling rope 18, the flat lining material 1 accommodated in the lining material supplying device 17 is fed out, drawn into the existing pipe line 13 through the manhole 11, and slid on the resin sheet 16 to make its tip end. 1a is introduced into the other manhole 12, and then the resin sheet 16 is removed.

Next, both ends of the lining material 1 drawn into the existing pipeline 13 are removed from the existing pipeline 13 by manholes 1 respectively.
Cut from the positions projecting to 1 and 12, and thereafter, as shown in FIG. 5, the tip 1a of the lining material 1 is closed by a plug body 22a having pores, and compressed air is supplied into the lining material 1 from the other end 1b. Then, the lining material 1 is expanded and pressed along the inner surface 13a of the existing pipeline 13. Since the lining material 1 is expandable in the circumferential direction, the lining material 1 is deformed following the inner surface 13a of the existing pipeline 13, and the supply of compressed air into the lining material 1 which is in close contact with the inner surface 13a is arranged in the manhole 11. It is performed by an air pressure feeding device 21 arranged on the ground through the air supply pipe 20, and one end of the air supply pipe 20 communicates with a hole formed in a plug body 22b that closes the other end 1b of the lining material 1.

The lining material 1 is expanded to expand the existing pipeline 13.
After pressing against the inner surface 13a, the heating device 22 provided in the middle of the air supply pipe 20 is operated, and the compressed air heated from the air pressure feeding device 21, for example, compressed air heated to 70 to 100 ° C. is switched to the lining. The thermosetting resin 4 in the lining material 1 is supplied by the compressed air supplied to the material 1 and heated.
And the inner surface 13a of the existing pipeline 13 is covered with the cured lining material 1.

After the lining material 1 is cured, a-
a and bb are cut to show both ends, and the portions projecting into the manholes 11 and 12 are cut off. Further, as shown in FIG. 6, both ends of the lining material 1 and the existing pipeline 13 are cut.
The end of the joint between and is covered with the curable resin 24 or the like from the manholes 11 and 12 side to complete the repair of the existing pipeline.

The pipe line 13 repaired in this way has the base materials 2, 3 made of glass fiber or the like over the entire length of the pipe line 13.
Reinforced by the lining material 1 which is so-called high-strength reinforced plastic (FRP), the lining material 1 is switched by supplying compressed air for expanding the diameter of the lining material 1 to heated compressed air. The diameter expansion and hardening can be performed continuously and easily, the repair work can be simplified, the repair period can be shortened, and compressed air and heated compressed air are used, so a relatively small-scale facility can be used. Combined with what is possible, a reduction in equipment and construction costs can be obtained.

In the above description, compressed air as a pressure fluid is supplied to the lining material to expand the diameter of the lining material, and then heated compressed air is supplied instead of compressed air to cure the lining material. By supplying heated compressed air to the lining material in the diameter state, it is possible to achieve the diameter expansion and hardening of the lining material by supplying the fluid once.

Next, another embodiment of the repairing method for the existing pipeline and the repairing device according to the present invention will be described with reference to FIGS.

Similar to the above-described embodiment, the lining material 1 accommodated in the lining material supply device is drawn into the existing pipeline 13 through the manhole, and as shown in FIG.
3 to the pipe line 13
From the positions projecting into the manholes 11 and 12, respectively, and then the tip 1a of the lining material 1 is closed by a plug 22a having pores, and compressed air is supplied into the lining material 1 from the other end 1b. The material 1 is spread and pressed along the inner surface 13a of the conduit 13.

The compressed air is supplied into the lining material 1 through an air hose 25 and is provided on the ground by an air pressure feeding device 26.
Done by This air hose 25 is located inside the lining material 1 with its tip closed, and has its base end slidably passing through the plug 22b and being wound around the winding device 27 on the ground, and via the heating device 32. It is connected to the air feeding device 26.

Further, at the tip of the air hose 25, the line B in FIG.
A pair of holding members 2 separated from each other as shown in the enlarged view of FIG.
7 is provided, and the tip of the air hose 25 is movably held by the holding member 27 along the conduit 13.

The air hose 25 is a jet nozzle 25 for jetting the compressed air sent from the air sending device 26 between the pair of holding members 27 toward the inner surface of the lining material 1.
a has a plurality of openings.

The holding member 27 is made of a flexible material and has a base end 28.
a is formed in the shape of a substantially disk-shaped brush that is connected to the outer periphery of the air hose 25 and extends in a radial direction, and the tip 28b thereof is pressed against the inner surface 13a of the pipe line 13 to form the lining material 1. Air hose 25 by sliding contact
Of the lining material 1 is held substantially on the central axis of the lining material 1 and is movably held along the central axis. Reference numeral 29 in the figure is a temperature measuring device for measuring the surface temperature of the lining material 1.

Further, at the tip of the air hose 25, a rope 31 which is pulled by a pulling device 30 which is a moving means disposed on the ground through a pore opening in the plug 22a for closing the tip of the lining material 1 and the manhole 12. Are joined at one end.

The lining material 1 is expanded by compressed air supplied from the air pressure feeding device 26 through the air hose 25 and pressed over the entire length of the inner surface 13a of the conduit 13, and then the lining is expanded and pressed against the inner surface 13a of the conduit. Material 1
To cure.

In order to cure the lining material 1, first, the air hose 25 is arranged between the air pressure feeding device 26 and the winding device 27 in a state where the tip end portion of the air hose 25 is located on the side of the other end 1b in the lining material 1. The heating device 32 is operated to 70 to 100
The air is heated and squeezed to ℃ and is jetted from the jet nozzle 25a of the air hose 25, and the pulling device 30 pulls the pulling rope 31 to start moving the tip of the air hose 25 from the other end 1b to the one end 1a. .

The hot compressed air radially ejected from the ejection nozzle 25a of the air hose 25 along with the movement is blown to the lining material 1 and stays between the pair of holding members 27 to partially heat and cure the lining material 1. While moving along with it, it moves with the air hose 25 and reaches the one end 1a to complete the curing of the lining material 1.

Therefore, since the holding member 27 is made of a flexible material and has a brush shape, even if the lining material 1 is pressed against the inner surface 13a of the conduit 13 having a step, a bend, or a narrow overflow portion, The air hose 25 is elastically deformed following the inner surface to stably hold the air hose 25, and the inner surface of the lining material 1 is not damaged, and the temperature measuring device 29 confirms the heating state, that is, the hardening state of the lining material 1 accompanying heating. It becomes possible to heat and cure the lining material 1 while moving it partially and continuously.
The heated compressed air from “a” has less effect of preceding heating to other parts, and can be uniformly cured over the entire length of the lining material 1, and a coating with the high quality lining material 1 can be obtained.

After the lining material 1 is hardened, both end portions are cut as shown by aa and bb in FIG. 7 to cut off the portions protruding into the manholes 11 and 12, and further both ends of the lining material 1 are cut. Manhole 1 at the joint end of the pipe and the pipe 13.
The repair of the existing pipeline is completed by coating with curable resin or the like from the 1 and 12 sides.

The pipe line 13 thus repaired is reinforced by the hardened lining material 1 as in the above-mentioned embodiment, and the compressed air for expanding the diameter of the lining material 1 is switched to the heated compressed air for repair. The work can be simplified and the repair period can be shortened, and the lining material 1 can be partially and continuously moved to be heat-cured, so that the lining material 1 can be uniformly hardened.

In the above description, the case of the so-called pulling-in method in which the lining material is pulled from the manhole into the pipeline by the pulling rope has been described, but a reversing method in which the lining material by compressed air is inverted and introduced into the pipeline can also be applied. It is a thing.

[0037]

According to the repairing method of the present invention described above,
For expanding the diameter of the lining material, the compressed air supplied into the lining material is switched from the expanded air to the heated compressed air and supplied to cure it, or the compressed air heated in the unexpanded lining material is supplied to the lining material. By expanding the diameter and hardening, the repair work can be simplified, the repair period can be shortened and the construction cost can be reduced, and the repairing device of the present invention can uniformly cure the lining material, and the lining By using the material, the bondability between the pipeline and the lining material is excellent and a high quality repair effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway explanatory view showing a lining material.

FIG. 2 is an explanatory diagram showing an embodiment of a method for repairing an existing pipeline.

FIG. 3 is an explanatory diagram showing an embodiment of a method for repairing an existing pipeline.

FIG. 4 is an explanatory diagram showing an embodiment of a method for repairing an existing pipeline.

FIG. 5 is an explanatory diagram showing an embodiment of a method for repairing an existing pipeline.

FIG. 6 is an explanatory diagram showing an embodiment of a repairing method for an existing pipeline.

FIG. 7 is an explanatory diagram showing another embodiment of a repairing method for an existing pipeline.

8 is an enlarged view of part B in FIG.

[Explanation of symbols]

 1 Lining Material 2, 3 Base Material 4 Thermosetting Resin 13 Existing Pipeline 13a Inner Surface 25 Air Hose 25a Jet Nozzle 26 Air Pressure Feeding Device 27 Holding Member 29 Temperature Measuring Device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 9:00 23:00

Claims (6)

[Claims] 1. A state in which an uncured tubular lining material containing a thermosetting resin is introduced into an existing pipeline, and the lining material is pressed against the inner surface of the existing pipeline by compressed air supplied into the lining material. In the repairing method of the existing pipeline where the thermosetting resin is heat-cured and the inner surface of the existing pipeline is covered with the hardened lining material, compressed air is supplied into the lining material introduced into the existing pipeline to supply the existing pipeline. An existing facility characterized by having a step of pressing the lining material against the inner surface of the road, and a step of supplying compressed air heated instead of the compressed air supplied into the lining material to cure the lining material. Pipe repair method. 2. A thermosetting material in which the lining material is pressed against the inner surface of the existing pipeline by compressed air supplied into an uncured tubular lining material containing a thermosetting resin introduced into the existing pipeline. In an existing pipeline repairing device that heat-cures resin and coats the inner surface of the existing pipeline with a hardened lining material, the base end is connected to an air pumping device and the tip is introduced into the lining material in the existing pipeline and An air hose whose tip is closed, a pair of disc-shaped holding members which are provided apart from each other at the air hose tip which holds the air hose tip movably in the conduit, and an air pumping device between the pair of holding members. Existing pipe repairing equipment, characterized by having an injection nozzle opening at the tip of the air hose for ejecting compressed air supplied from the device, and a moving means for moving the tip of the air hose along the inside of the pipeline. Place. 3. The holding member is in the shape of a substantially disk-shaped brush made of a flexible material and having a plurality of linear members whose base ends are joined to the outer circumference of the air hose and extend radially. Equipment for repairing existing pipelines. 4. The existing pipeline repair device according to claim 2, further comprising a temperature measuring device that measures the surface temperature of the lining material between the pair of holding members. 5. A state in which an uncured tubular lining material containing a thermosetting resin is introduced into an existing pipeline, and the lining material is pressed against the inner surface of the existing pipeline by compressed air supplied into the lining material. In a lining material that heat-cures a thermosetting resin to cover the inner surface of an existing pipeline, a uncured state is obtained by impregnating a base and a base woven with a fiber bundle made of reinforcing fibers in a circumferentially extensible tubular shape. A lining material for repairing an existing pipeline, which has a resin layer made of a thermosetting resin. 6. The existing pipeline repairing lining material according to claim 5, wherein the base has a tubular shape in which a plurality of fiber bundles that are inclined with respect to the circumferential direction cross each other and are knitted.