JP2690716B2 - Equipment for pipe repair 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 pipe part repairing device for partially lining a damaged part or the like of a pipeline and repairing the part, and a pipe part repairing method constructed using the same.

[0002]

2. Description of the Related Art When a pipe such as a sewer pipe buried in the ground is partially damaged such as a defect, a lining is partially applied to the damaged portion without excavating the pipe. The pipe section repair method for repairing such parts is already known.

That is, in the above-mentioned pipe part repairing method, for example, a lining material impregnated with a thermosetting resin is attached to the outer periphery of the pressure bag, and the pressure bag is introduced into the conduit together with the lining material to be used in a TV camera. While monitoring the inside of the pipe, set the pressure bag and the lining material in the predetermined places, then supply hot water, hot air, heat medium such as steam to the pressure bag, and heat the lining material with the heat of the heat medium. The work of hardening the thermosetting resin impregnated in the lining material, then removing the heat medium supplied to the pressure bag and pulling out the pressure bag from the lining material is carried out. Then, the hardened lining material remains in the pipeline, and the damaged portion of the pipeline is lined and repaired without excavating it.

[0004]

By the way, conventionally, a method of holding the lining material on the outer periphery of the pressure bag by inserting the pressure bag inside the lining material has been adopted, but the length of the lining material is 50 cm. If it becomes longer than that, it is impossible to insert the pressure bag into the inside of the long lining material.

Therefore, a method of reversibly inserting the pressure bag into the long lining material by fluid pressure can be considered. However, when a hose such as a hot water suction hose is attached to the end portion of the pressure bag, the inside of the pressure bag is Since it is impossible to ensure high airtightness, it is impossible to invert or pull back the pressure bag.

By the way, there are long and short lengths required for partial repair of the pipeline. Therefore, it is necessary to use a short lining material of 50 cm or less or a long lining material of 50 cm to 3 m for lining in an almighty manner.

The present invention has been made in view of the above problems, and an object of the present invention is to perform a partial repair of a pipe line by using a lining material having a short length to a long lining material. It is to provide a pipe part repairing device and a pipe part repairing method.

[0008]

In order to achieve the above object, the invention according to claim 1 has a lining material having a resin impregnated layer impregnated with at least a thermosetting resin, and a fluid pressure inside the lining material. A reversely inserted pressure bag, and a pressure nozzle that closes the open end of the pressure bag,
A tube including a hose which is inserted through a hose insertion nozzle which is provided through the pressure nozzle and whose end is connected to the end of the pressure bag, and a stopper which is attached to a part of the outer periphery of the hose. It is characterized in that it comprises equipment for partial repair.

According to a second aspect of the invention, in the first aspect of the invention, the resin-impregnated layer of the lining material is provided outside the resin-impregnated layer.
A water-stopping agent-impregnated layer formed by impregnating a water-stopping agent is formed.

According to a third aspect of the present invention, in the pipe part repairing method, the pipe part repairing equipment is introduced into the pipe line in a state where the pressure bag is contracted, and the pipe bag is set at a predetermined position. A pressure fluid is supplied to the inside of the pressure bag of the pipe part repairing equipment to expand the pressure bag, and the lining material is pressed against the inner peripheral wall of the pipe line by the pressure bag,
After heating the lining material with a heat medium supplied to the inside of the pressure bag to cure the thermosetting resin impregnated therein, the pressure fluid and heat medium in the pressure bag are removed and the hose is pulled. The pressure bag is extracted from the lining material by.

According to a fourth aspect of the present invention, in the third aspect of the present invention, when the pipe part repairing device is introduced and set in the pipe line, a lining material is provided on the outer periphery of the pressure bag in a contracted state. It is characterized in that it is held by an elastic thread.

Therefore, according to the present invention, since the pressure bag is reversely inserted into the lining material by the fluid pressure, even if the lining material has a long length, it is held on the outer periphery of the pressure bag and the pipeline is Can be used for partial repair.

Further, after the pipe part repairing equipment is set at a predetermined position in the pipe line, a pressure fluid is supplied to the inside of the pressure bag to expand the pressure bag, and the pressure bag is connected to the end portion of the pressure bag. The hose is drawn into the pressure bag by the reversing operation of the pressure bag, and the stopper attached to the outer periphery of the hose closely adheres to the hose insertion nozzle of the pressure nozzle and seals that portion, so high airtightness is maintained inside the pressure bag. The leakage of the pressure fluid and the heat medium supplied thereafter is prevented, and the partial repair of the pipeline using the long lining material is stably performed.

[0014]

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

FIG. 1 is a cross-sectional view of the lining material, and FIG. 2 is a cross-sectional view showing the reverse insertion of the pressure bag into the lining material.

The lining material 1 shown in FIG. 1 is constructed by forming a waterproof agent impregnated layer 3 impregnated with a waterproof agent on the outside of a resin impregnated layer 2 impregnated with a thermosetting resin. The inner peripheral surface of the resin-impregnated layer 2 is covered with a plastic film 4 having high airtightness.

The resin impregnated layer 2 is formed by impregnating a tubular non-woven fabric such as acrylic, polyester, nylon or glass cloth with a thermosetting resin such as unsaturated polyester resin, epoxy resin or vinyl ester resin. The waterproof agent impregnated layer 3 is formed by impregnating a similar tubular nonwoven fabric with a waterproof agent such as polyurethane or polyamide.
As the plastic film 4, a film made of polyethylene, polyurethane, vinyl chloride or the like is used.

The lining material 1 constructed as described above has a relatively long length of 50 cm or more, and a bag-shaped pressure bag 5 as shown in FIG. It is reversed and inserted. The pressure bag 5 is formed by covering the surface of the woven cloth with a highly airtight plastic film.

In FIG. 2, 5 is a cup-shaped pressure nozzle made of metal or plastic, and a hose insertion nozzle 7 is fixedly inserted through the center of the pressure nozzle 6, and the hose insertion nozzle 7 is fixed. An air hose 8 and a hot water hose 9 are connected around the hose insertion nozzle 7. The air hose 8 is connected to the compressor 10, and the hot water hose 9 is connected to the hot water pump 11.

Further, an opening at one end of the pressure bag 5 is attached to the outer periphery of the pressure nozzle 6 by being folded back outward, and a space S closed by the pressure nozzle 6 is formed in the pressure bag 5. Has been done. Then, each end of the hot water suction hose 12 and the tow rope 13 which are not buckled even at high temperature is attached to the end portion of the non-inverted portion of the pressure bag 5. A wedge-shaped stopper 14 is attached to a part of the outer circumference of the hot water suction hose 12.

Thus, in order to reversely insert the pressure bag 5 into the relatively long lining material 1, while pulling the tow rope 13, the compressor 10 is driven to move compressed air from the air hose 8 into the pressure bag 5. Supply into the space S. Then, the pressure bag 5 is inserted into the lining material 1 while being reversed by the pressure of the compressed air.

Then, as shown in FIG. 2, the pressure bag 5
Penetrates through the lining material 1 and the hot water suction hose 1
The reversal insertion of the pressure bag 5 into the lining material 1 is completed at the time when the stopper 14 attached to the outer periphery of 2 comes into contact with the hose insertion nozzle 7. In this way, the pressure bag 5 is reversely inserted into the lining material 1 by the pressure of the compressed air. Therefore, even when the lining material 1 is long, the pressure bag 5 can be easily reversely inserted inside the lining material 1, and the lining material 1 can be easily inserted. The material 1 is held on the outer circumference of the pressure bag 5.

Thus, the lining material 1, the pressure bag 5, the pressure nozzle 6, the air hose 8, the hot water hose 9, the hot water suction hose 12 and the like described above constitute the pipe part repairing device 15. Next, this pipe part repair equipment 15
A pipe part repairing method constructed by using the above will be described with reference to FIGS. 3 to 7. 3 to 7 are sectional views showing a pipe part repairing method according to the present invention, and FIG. 5 is an enlarged detailed view of a portion A of FIG.

In FIG. 3, reference numeral 20 denotes a pipeline such as a sewer pipe buried in the ground. Inside the pipeline 20, a pipe part repairing device 15 including a lining material 1 and a pressure bag 5 and a monitor are provided. The TV camera 21 is pulled by the tow rope 22. The tow rope 13 attached to the end portion of the pressure bag 5 is connected to the TV camera 21.

Then, the pipe part repairing device 15 is connected to the pipe line 20.
When drawing in, the compressed air is removed from the inside of the pressure bag 5 to contract the pressure bag 5, and the lining material 1 is held on its outer periphery by a plurality of elastic threads 23 such as rubber threads.

When the TV camera 21 and the pipe part repairing device 15 are moved in the pipe line 20 by pulling the tow rope 22, when the lining material 1 of the pipe part repairing device 15 reaches a predetermined position to be partially repaired. The movements of the TV camera 21 and the pipe part repairing device 15 are stopped, and these are set in their place.

Next, the compressor 10 is driven to drive FIG.
When compressed air is supplied from the air hose 8 into the space S in the pressure bag 5 as shown in FIG. 5, the pressure bag 5 expands and the lining material 1 held on the outer periphery of the pressure bag 5 is removed from the pipe 20 as shown in the figure. Press on the peripheral wall. The lining material 1 is held on the outer periphery of the pressure bag 5 by the elastic yarn 23 as described above, and the elastic yarn 23 is expanded as the pressure bag 5 expands.
Are expanded, the lining material 1 expands together with the pressure bag 5 and is pressed against the inner peripheral wall of the conduit 20.

By the way, when compressed air is supplied to the space S in the pressure bag 5 as described above, one end of the hot water suction hose 12 is connected to the end portion of the pressure bag 5.
Is drawn into the space S by the reversing operation of the pressure bag 5, and the wedge-shaped stopper 14 bound to the outer periphery of the pressure bag 5 comes into close contact with the hose insertion nozzle 7 of the pressure nozzle 6 to seal the portion. Here, details of the seal portion are shown in FIG.
As shown in the figure, the end of the hose insertion nozzle 7 that faces the outside of the space S forms a conical tapered surface 7a that spreads outward, and the packing 16 is bonded to this tapered surface 7a. There is. In addition, the hose insertion nozzle 7 has an O
A ring 17 is incorporated, and the O-ring 17 seals between the hot water suction hose 12 and the hose insertion nozzle 7.

Therefore, when the hot water suction hose 12 is pulled by the pressure bag 5 in the direction of arrow a in FIG. 5, the wedge-shaped stopper 14 bound to the outer periphery of the hot water suction hose 12 is attached to the tapered surface 7 a of the hose insertion nozzle 7. The space S is hermetically sealed by closely contacting the adhered packing 16.
As the pressure bag 5 is pressurized, the hot water suction hose 12 is pulled with a stronger force and the stopper 14 is more firmly attached to the packing 16, so that the space S is more reliably sealed and the space S is more reliably sealed. Prevents compressed air from leaking to the outside.

Thus, in the state where the lining material 1 is pressed against the inner peripheral wall of the pipeline 20 as shown in FIG. 4, for example, groundwater entering from the connecting portion of the pipeline 20 is impregnated with the waterproofing agent of the lining material 1. When the water blocking agent with which the layer 3 is impregnated is touched, the water blocking agent hardens and prevents the infiltration of groundwater into the pipeline 20.

Next, while the lining material 1 is being pressed against the inner peripheral wall of the conduit 20 as shown in FIG. 4, the warm water pump 11 is driven to supply warm water from the warm water hose 9 to the space S in the pressure bag 5.
When the hot water is circulated in the space S by being sucked and discharged by the hot water suction hose 12, the lining material 1 is heated by the hot water through the pressure bag and impregnated into the resin impregnated layer 2 of the lining material 1. The cured thermosetting resin is cured. It should be noted that leakage of the warm water from the space S can be surely prevented by the sealing function of the stopper 14.

When the lining material 1 is hardened as described above, compressed air and hot water are extracted from the space S in the pressure bag 5, and the hot water suction hose 12 is pulled in the direction of the arrow b as shown in FIG. Hot water suction hose 12
The pressure bag 5 connected to is reversely reversed and peeled off from the inner peripheral surface of the lining material 1 and removed. Since the inner peripheral surface of the lining material 1 is covered with the plastic film 4 (see FIG. 1) as described above, the pressure bag 5 is easily peeled from the lining material 1 without adhering to the lining material 1. It

Then, the pressure bag 5 is peeled off from the lining material 1 as described above, and the pipe part repairing device 15 excluding the lining material 1 and the TV camera 21 are removed from the inside of the pipe line 20, as shown in FIG. Thus, only the hardened lining material 1 remains in the conduit 20, and the conduit 20 is partially lined by the lining material 1 for repair.

Although hot water is used as the heating medium for heating the thermosetting resin in the present embodiment, steam, oil or the like may be used as the heating medium.

[0035]

As is apparent from the above description, according to the present invention, the pressure bag is reversed and inserted into the lining material by the fluid pressure. It can be held on the outer periphery of the bag and used for partial repair of the pipeline.

Further, according to the present invention, after the pipe part repairing device is set at a predetermined position in the pipeline, the pressure bag is inflated by supplying the pressure fluid to the inside of the pressure bag. The hose connected to the end is pulled into the pressure bag by the reversing operation of the pressure bag, and the stopper bound to the outer periphery of the hose is in close contact with the hose insertion nozzle of the pressure nozzle to seal the part. High airtightness is secured inside, leakage of the pressure fluid and the heat medium supplied thereafter is prevented, and the partial repair of the pipeline using the long lining material is stably performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a lining material.

FIG. 2 is a cross-sectional view showing inversion insertion of a pressure bag into a lining material.

FIG. 3 is a sectional view showing a pipe part repairing method according to the present invention.

FIG. 4 is a cross-sectional view showing a pipe part repairing method according to the present invention.

FIG. 5 is an enlarged detail view of a portion A in FIG. 4;

FIG. 6 is a cross-sectional view showing a pipe part repairing method according to the present invention.

FIG. 7 is a cross-sectional view showing a pipe part repairing method according to the present invention.

[Explanation of symbols]

 1 Lining Material 2 Resin Impregnated Layer 3 Water Stopper Impregnated Layer 5 Pressure Bag 6 Pressurizing Nozzle 7 Hose Insertion Nozzle 12 Hot Water Suction Hose (Stopper) 15 Stopper 15 Pipe Part Repair Equipment 20 Pipeline 23 Elastic Thread

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location B29L 23:00 (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Prefecture Limited company Yokoshimanai (72) Inventor Shigeru Endo Getco, Ltd., 2-12-4 Hanabata, Tsukuba-shi, Ibaraki (56) Reference JP-A-2-252529 (JP, A)

Claims (4)

(57) [Claims] 1. A lining material having a resin-impregnated layer impregnated with at least a thermosetting resin, a pressure bag reversely inserted into the lining material by fluid pressure, and a pressurization for closing an open end of the pressure bag. A nozzle, a hose that is inserted through a hose insertion nozzle that penetrates the pressure nozzle, and has an end connected to the end of the pressure bag; and a stopper that is attached to a part of the outer circumference of the hose. A pipe part repairing device characterized by being configured to include. 2. The pipe part repairing device according to claim 1, wherein the lining material is formed by forming a water blocking agent impregnated layer formed by impregnating a water blocking agent on the outside of the resin impregnated layer. 3. A lining material having a resin-impregnated layer impregnated with at least a thermosetting resin, a pressure bag reversely inserted into the lining material by fluid pressure, and a pressurization for closing an open end of the pressure bag. A nozzle, a hose that is inserted through a hose insertion nozzle that penetrates the pressure nozzle, and has an end connected to the end of the pressure bag; and a stopper that is attached to a part of the outer circumference of the hose. A method of construction using a pipe part repairing device configured to include the pipe part repairing device, wherein the pipe part repairing device is introduced into the pipeline with the pressure bag being contracted, and this is set at a predetermined position. After that, a pressure fluid is supplied to the inside of the pressure bag of the pipe part repairing equipment to expand the pressure bag, and the lining material is pressed against the inner peripheral wall of the pipe line by the pressure bag. Bag After the thermosetting resin impregnated in the heat medium is heated by the heat medium supplied inside the pressure bag, the pressure fluid and heat medium in the pressure bag are removed and the hose is pulled to line the pressure bag. Pipe part repairing method characterized by extracting from the material. 4. The lining material is held by an elastic thread on the outer periphery of the pressure bag in a contracted state when the pipe part repairing equipment is introduced and set in the pipe line. The pipe part repairing method described in 3.