JPH06210733A - Lining material for branch pipe and execution thereof - Google Patents

Abstract

PURPOSE:To achieve the wt. reduction of a lining material and to simply and certainly execute the lining material. CONSTITUTION:A seal tube 5 having a bag shape and having a heating element 7 embedded therein is bonded to the rear end part of a lining material main body 2 consisting of a felt flange 4 and a felt tube 5 by a low m.p. adhesive 9 to form a lining material 1. The felt tube 5 and the seal tube 3 are reversed to be inserted in a branch pipe and the thermosetting resin infiltrated in the felt tube 5 is cured. Thereafter, the seal tube 3 is pulled back while the heating element 7 embedded in the seal tube 3 is heated to melt the low m.p. adhesive 9 to be peeled from the cured felt tube 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe lining material for forming a synthetic resin pipe on the inner surface of a branch pipe of an existing pipe such as a sewer pipe, a water supply pipe, and an oil feed pipe, and a construction method thereof.

[0002]

2. Description of the Related Art For example, a method of lining synthetic resin on the inner surface of the main pipe of an existing pipe has been adopted for the purpose of reinforcing the strength of existing pipes such as sewer pipes, water pipes, anticorrosion measures, water leakage and intrusion water measures, or improving the flow rate. There is. The most invading water enters from the connection part of the mounting pipe branched from the sewer main, for example. In order to prevent intrusion of water from the connecting portion of the mounting pipe or the cracked portion of the mounting pipe itself, various types of stoppers are disclosed as disclosed in, for example, JP-A-2-239920 and JP-A-3-130130. The water method is used.

When the main pipe connecting portion of this mounting pipe is lined with a synthetic resin, for example, as shown in FIG. 9, a felt collar 4 containing a thermosetting resin and a felt collar 4 containing a thermosetting resin are used. The felt tube 5 fixed to the hole and the inner tube 5 covering the felt tube 5.
The lining material 50 consisting of 1 is used. The brim 4 of this lining material 50 is fixed to the connecting portion of the mounting pipe 31 of the main pipe 30 with a packer 52 or the like made of a bag-shaped elastic body, and a fluid supply hose 55 having a fluid discharge hole 54 at its tip portion. Supply pressurized air into the reverse guide pipe 53 from the
While inverting the valve 51, attach the felt tube 5 to the mounting tube 3
Invert and insert into 1 to put felt collar 4 and felt tu
After the thermosetting resin contained in the tube 5 is cured, the inner tube 51 is removed to form an integral synthetic resin layer on the main tube connecting portion of the mounting tube and the inner surface of the long mounting tube 31. ing.

[0004]

As described above, the inner
Felt tube impregnated with thermosetting resin in tube 51
Although the inner surface of the relatively long attachment pipe can be lined at the same time as the main pipe connecting portion by covering the tube 5, the felt tube 5 is pressed with the inner tube 51 pressed against the entire surface of the felt tube 5. Since the thermosetting resin impregnated in the inner tube 51 is hardened, the inner tube 51 adheres to the felt tube 5, and it is not easy to collect the inner tube 51.

An inner tube having a length of 5 or more for the felt tube for lining the inner surface of the long mounting tube.
Since the felt tube 5 is covered with the sleeve 51, the lining material 50 becomes heavy, which is inconvenient for handling and positioning during traveling to the main pipe connecting portion.

The present invention has been made in order to eliminate such inconvenience and the like, and an object thereof is to obtain a branch pipe lining material which is lightweight and can be easily installed, and an installation method thereof. is there.

[0007]

A liner for a branch pipe according to the present invention is a felt having a hole corresponding to the diameter and shape of a main pipe connecting portion of a branch pipe provided at one end thereof and having a thermosetting resin attached or impregnated therein. A brim, a felt tube fixed in the hole of the brim and impregnated with a thermosetting resin, and a flexible and heat-resistant resin sheet, the front end was opened and the rear end was sealed. It has a bag shape, a heating element embedded in at least the inner surface of the front end, and a seal tube in which a lead wire is drawn from the rear end, and the rear end of the felt tube and the front end of the seal tube. And are bonded with a low melting point adhesive.

Further, in the method for constructing a branch pipe lining material according to the present invention, the above-mentioned lining material is inserted into the holding portion of the lining work tool, and the felt collar is attached to the upper surface of the holding portion.
Connect the rear end of the tube to the fluid supply hose along the electric cable, connect the lead wire drawn from the seal tube to the electric cable, and connect the rear end of the holding part. After sealing, move the lining work tool to the main pipe connecting part of the branch pipe, press the felt collar attached to the upper surface of the holding part to the main pipe connecting part, and supply the pressurized fluid from the fluid supply hose to the felt. The tube and seal tube are inverted and inserted into the branch pipe, and the felt collar and the thermosetting resin contained in the felt tube are heat-cured, and then inside the seal tube via the electric cable. The heating element is energized to draw out the fluid supply hose while heating to above the melting point of the low melting point adhesive.

[0009]

According to the present invention, the rear end of the felt tube having the felt collar at the tip is adhered and sealed with a bag-shaped seal tube so that the felt tube is connected to the main pipe connecting portion. Direct inversion with pressurized fluid into the branch tube.

The felt tube and the seal tube are adhered with a low melting point adhesive, and the felt tube and the seal tube are inverted and inserted into a branch pipe to impregnate the felt tube with heat. After the curable resin is cured, the heating element embedded in the seal tube is heated to melt the low melting point adhesive and pull back the seal tube to cure the felt tube.
Peel the shield tube from the sleeve.

[0011]

1 is a cross-sectional view showing a branch pipe lining material according to an embodiment of the present invention. As shown in FIG. 1, the lining material 1 has a lining material body 2 and a seal tube 3. As shown in the perspective view of FIG. 2, the lining material main body 2 includes a felt collar 4 and a felt tube joined to the felt collar 4.
It is formed of the bubu 5. The felt collar 4 and the felt tube 5 are made of a synthetic resin woven fabric or non-woven fabric impregnated with a thermosetting resin, and the felt collar 4 has a central portion corresponding to the diameter and shape of the main pipe connecting portion of the mounting pipe to be constructed. An oval hole 6 having a size is formed. The felt tube 5 has an outer diameter of 90 to 100% of the inner diameter of the mounting pipe, and the felt collar 4
It is glued by heating or sewn. The seal tube 3 is made of a synthetic resin sheet having flexibility and heat resistance, and as shown in the cross-sectional view of FIG. 3, has a bag-like shape in which the front end is opened and the rear end is sealed. A heating element 7 composed of a heating wire or a surface heating element is embedded in the inner surface or the entire surface. A conductor wire 8 connected to the heating element 7 is drawn out from the rear end of the seal tube 3. And the lining material body 2
Felt tube 5 rear end outer surface and seal tube 3
As shown in the sectional view of FIG. 1, the inner surface of the tip of the above is bonded and integrated with a rubber-based low melting point adhesive 9.

The lining material 1 constructed as described above is lined to a mounting pipe connected to a main pipe of a sewer pipe by a lining device 10 shown in a sectional view of FIG. 4, for example. This lining device 10 has an automatic traveling vehicle 11 and a lining work tool 12 attached to the automatic traveling vehicle 11. The automatic vehicle 11 has a small hydraulic device 13 built-in, and the hydraulic device 1
The lining work tool 12 is driven by traveling with the pressure oil sent from 3 as a drive source.

As shown in the sectional view of FIG. 5, the lining work tool 12 includes an elevating / pressurizing means 14, a holding portion 15, and a sheet.
And a cable portion 16. The holding portion 15 has a semi-cylindrical shape having a convex surface on the upper part, and has an inner contact plate 17 having a guide hole 18 corresponding to the diameter of the main connection port of the branch pipe at the center, and a lower part of the guide hole 18 of the inner contact plate 17. And a guide pipe 19 attached so as to be curved. The seal portion 16 has an outer envelope tube 21 connected to the end portion of the guide pipe 19 with a fixture 20, and a water stop plate 22 attached to the other end portion of the outer envelope tube 21. The water stop plate 22 is provided with a lead-in hole for the fluid supply hose 23 and a mounting hole for the fluid discharge hose 24. The elevating / pressurizing means 14 has a pair of elevating hydraulic cylinders 25 for elevating and lowering the inscribed plate 17, and a hydraulic cylinder for pressurization equipped with a reaction force clamp 26 for applying a pressing force in a direction opposite to the ascending direction of the inscribed plate 17. 27 and.

Then, the lining material 1 is inserted into the holding portion 15 from the guide hole 18 of the inscribed plate 17 of the lining work tool 12 in the manhole, and the felt brim 4 of the lining material 1 is inserted.
Is arranged on the upper surface of the inscribed plate 17. When a long felt tube 5 is used for lining the inside of the long attachment tube, the felt tube 5 is folded or rolled up. After that, a fluid supply hose 23 along with an electric cable is inserted from a lead-in hole of a water stop plate 22 attached to a rear end portion of the outer casing tube 21 of the seal portion 16, and the lining material 1
The conductor 8 drawn out from the sheath tube 3 is connected to the electric cable. Next, the tip of the envelope tube 21 is
As shown in the sectional view of FIG. 6, the guide pipe 1 of the holding portion 15
The holding part 15 is sealed by connecting to the rear end part of the fixing member 9 with a fixing tool 20.

In this state, the hydraulic device 13 built in the automatic traveling vehicle 11 is driven by an external remote control device to drive to a position of a predetermined main pipe connecting port of the mounting pipe 31 to position and stop. After that, the felt collar 4 on the upper surface of the inscribed plate 17 of the lining work tool 12 is aligned with the position of the main pipe connection port while checking with a television camera or the like (not shown). When the lining work tool 12 is moved to a predetermined position for positioning, the lining material 1 is composed of only the lining material body 2 and the seal tube 3 connected to the rear end of the lining material body 2. Therefore, the weight of the lining material 1 can be reduced, and the lining material 1 can be easily moved and positioned.

When the alignment of the felt collar 4 is completed, pressure oil is sent to the pressurizing hydraulic cylinder 27 and the lifting hydraulic cylinder 25 of the lining work tool 12, and the pressurizing hydraulic cylinder 27 and the lifting hydraulic cylinder 25 are moved forward. 7, the holding portion 15 is lifted, and the felt collar 4 on the upper surface of the inscribed plate 17 is connected to the main pipe 30 around the main pipe connection port as shown in the sectional view of FIG.
Press on the inner surface. In FIG. 7, 32 is the main pipe 30.
2 shows a synthetic resin tube lined on the inner surface of the.

In this state, the flow passage of the fluid discharge hose 24 attached to the water stop plate 22 of the seal portion 16 is blocked to seal the pressurized fluid such as compressed air from the fluid supply hose 23. It is supplied into the holding portion 15 sealed by the portion 16. By the supply of the pressurized fluid, the felt tube 5 of the lining material 1 is sequentially inverted and inserted into the mounting pipe 31 as shown in FIG. 7, and is pressed against the inner surface of the mounting pipe 41. If more pressurized fluid is supplied,
As shown in the sectional view of FIG. 8, the seal tube 3 is also inverted and inserted into the mounting pipe 31. The seal tube 3 is reversed,
After the insertion, the heating and pressurizing fluid is supplied from the fluid supply hose 23 and circulated through the fluid discharge hose 24 for a certain time, and the thermosetting resin contained in the felt collar 4 and the felt tube 5 of the lining material 1. Is cured by heating to form a lining layer that is in close contact with the main pipe connecting portion of the mounting pipe 31 and the inner surface of the mounting pipe 31.

After supplying the heating and pressurizing fluid for a predetermined time, the inside of the holding portion 15 is returned to the normal pressure, and then the inside of the seal tube 3 is connected through the electric cable along which the fluid supply hose 23 is arranged. The heating element 7 is energized and heated to a temperature equal to or higher than the melting point of the low melting point adhesive 9, and the fluid supply hose 23 that does not melt the adhesive 9 is drawn to the outside. Thus felt tube 5 and seal tube
A fluid supply hole while melting the adhesive 9 to which the joint 3 is joined.
The sheath tube 3 can be easily separated from the felt tube 5 by pulling out the space 23 to the outside, and the inner surface of the mounting tube 31 and the connecting portion of the main tube 30 can be sealed only by the lining material body 2. -You can

After the seal tube 3 is separated from the felt tube 5, the pressurizing hydraulic cylinder 27 and the lifting hydraulic cylinder 25 are retracted to lower the holding portion 15, and the inscribed plate 17 is moved to the felt collar 4. Keep away from. After that, automated vehicle 1
Run 1 to prepare for the next task.

[0020]

As described above, according to the present invention, the rear end of the felt tube having the felt collar at the tip is adhered and sealed with the bag-shaped seal tube, and the felt tube is sealed. Since it is possible to directly insert the pressurized fluid into the branch pipe from the main pipe connection part, the weight of the lining material itself can be reduced, handling at the time of movement is easy, and the main pipe joint part of the branch pipe is It can be easily positioned and the number of construction steps can be reduced. In particular, when the lining length of the branch pipe is increased, the weight can be further reduced as compared with the conventional lining material.

The felt tube and the seal tube were adhered with a low melting point adhesive, and the felt tube and the seal tube were inverted and inserted into the branch pipe to heat the felt tube. After the curable resin is cured, the heating element embedded in the seal tube is heated to pull back the seal tube while melting the low-melting adhesive, so that the felt tube is cured from the cured felt tube. The tube can be easily peeled off and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a branch pipe lining material according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main body of an inner lining material.

FIG. 3 is a cross-sectional view showing a seal tube of a lining material.

FIG. 4 is a cross-sectional view showing a lining device.

FIG. 5 is a cross-sectional view showing a lining work tool.

FIG. 6 is a cross-sectional view showing a state in which a lining material is attached to a lining work tool.

FIG. 7 is a sectional view showing a first step of the lining work.

FIG. 8 is a sectional view showing a second step of the lining work.

FIG. 9 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Lining Material 2 Lining Material Main Body 3 Seal Tube 4 Felt Collar 5 Felt Tube 7 Heating Element 8 Conductor Wire 9 Low Melting Adhesive 10 Lining Device 11 Autonomous Vehicle 12 Lining Work Tool

Front Page Continuation (72) Inventor Takaro Yanagisawa 1-23-7 Yokodai, Isogo-ku, Yokohama, Kanagawa

Claims (2)

[Claims] 1. A felt brim having a hole adapted to the diameter and shape of a main pipe connecting portion of a branch pipe at one end thereof and having a thermosetting resin adhered thereto or impregnated with the brim, and fixed to the hole of the brim to be thermoset. Made of a felt tube impregnated with a flexible resin and a flexible and heat-resistant resin sheet, and has a bag-like shape with the front end open and the rear end sealed, with a heating element embedded at least on the inner surface of the front end. And a seal tube having a conductive wire drawn out from the rear end portion, and the rear end portion of the felt tube and the front end portion of the seal tube are bonded with a low melting point adhesive. Lining material for branch pipes. 2. The lining material is inserted into a holding portion of a lining work tool, and a felt collar is attached to an upper surface of the holding portion,
The rear end of the seal tube is connected to the fluid supply hose along the electric cable, the lead wire drawn from the seal tube is connected to the electric cable, and the rear end of the holding portion is connected. The part is sealed and the lining work tool is moved to the main pipe connection part of the branch pipe, the felt collar attached to the upper surface of the holding part is pressed against the main pipe connection part, and pressurized fluid is supplied from the fluid supply hose. The felt tube and the seal tube are inverted and inserted into the branch pipe, and the felt collar and the thermosetting resin contained in the felt tube are heat-cured, and then the seal tube is inserted through the electric cable. A method for applying a lining material for a branch pipe, characterized in that a fluid supply hose is drawn out while energizing a heating element therein to heat it to a temperature not lower than the melting point of the low melting point adhesive.