JP3178690B2 - Reverse lining 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 reversing lining method for forming a synthetic resin pipe on the inner surface of a pipe having a small diameter and a large number of bends, such as a branch pipe of an existing pipe such as a sewer pipe, a water pipe, and an oil feed pipe. It is.

[0002]

2. Description of the Related Art For the purpose of reinforcing the strength of existing pipes such as sewage pipes, water pipes, etc., countermeasures against corrosion, countermeasures against leakage or intrusion, or improvement of flow rate, a method of lining a synthetic resin on the inner surface of a main pipe of the existing pipes has been adopted. I have. For example, the most intrusion water enters from a connection portion of a mounting pipe branched from a sewer main pipe. In order to prevent intrusion of water from the connection portion of the mounting pipe or a broken portion of the mounting pipe itself, various types of stoppages are disclosed, for example, in JP-A-2-239920 and JP-A-3-130130. Water method is adopted.

[0003] When the main pipe connection portion of the mounting pipe is lined with a synthetic resin, the lining material containing a thermosetting resin is inverted and inserted into the mounting pipe with a pressurized fluid, and the thermosetting resin contained in the lining material is removed. The resin is cured to form an integral synthetic resin layer on the main pipe connecting portion of the mounting pipe and on the inner surface of the mounting pipe.

[0004] When the synthetic resin layer of the mounting pipe is formed by inverting and inserting the lining material in this manner, in order to invert and insert the lining material into a small-diameter, frequently bent mounting pipe, the lining material is inverted and inserted. It is necessary to increase the pressure of the fluid to perform. If the pressure of the fluid for inversion and insertion is too high, the distortion of the lining material will increase, and a synthetic resin layer having a uniform thickness will not be formed. For example, Japanese Patent Publication No. 59-12911 (JP-A-56-2011)
No. 885), the entire length of the lining material is fixed to one end of the lining material through a rope, the tip of the rope is pulled out through the mounting pipe, and the rope passing through the mounting pipe is pulled. While the reversing portion of the lining material is advanced along the rope, the lining material is inverted and inserted into a small-diameter, highly bent mounting pipe with a relatively low-pressure fluid.

[0005]

As described above, in order to advance the reversing portion of the lining material along the rope pulled through the inside of the mounting pipe, a pulling and guiding rope is previously passed through the mounting pipe. Therefore, it is not easy to pass the pulling and guiding ropes through a small-diameter, highly bent mounting pipe.

Further, a pulling and guiding roll passed through the mounting pipe.
It was necessary to set up a reel or the like for winding the tape at the other end of the mounting pipe, so that extra work space had to be secured.

Further, when the tension of the pulling and guiding ropes is reduced and loosened, the reversing portion of the lining material rides on the rope and the reversal does not proceed, so that the winding speed of the rope is reduced. Must be adjusted according to the advancing speed of the reversing portion of the lining material, and it is not easy to adjust the winding speed of the rope in a bent pipe in which the advancing speed of the lining material reversing portion changes. .

SUMMARY OF THE INVENTION The present invention has been made to solve such a disadvantage, and an object of the present invention is to provide a reversing lining method capable of easily reversing and inserting a lining material into a small-diameter, highly bent branch pipe. Is what you do.

[0009]

The reversal lining method according to the present invention is characterized in that a rod having a guide portion having a convex curved surface is provided at the tip of a rod having flexibility and rigidity. A flange is inserted at one end and inserted into a flexible cylindrical lining material impregnated with a thermosetting resin from the side of the brim, and the brim of the lining material is pressed against the inner surface of the main pipe connecting portion of the branch pipe,
The lining material is inverted and inserted into the branch pipe while the guide part of the guide part follows the inner surface of the branch pipe.

[0010]

According to the present invention, when the lining material is inverted and inserted into the branch pipe, the guide portion inserted into the lining material is automatically pushed forward by the inversion of the lining material.
The pushed-out guide portion advances along the inner surface of the branch pipe by the curved surface of the guide portion at the tip. When the guide section at the distal end moves forward, the rod-shaped body to which the guide section of the guide section is attached has rigidity and flexibility, and thus curves according to the shape of the branch pipe. The reversing portion of the lining material is advanced along a rod-like body curved according to the shape of the branch pipe.

[0011]

FIG. 1 is a sectional view showing a branch pipe lining material according to an embodiment of the present invention. As shown in FIG. 1, a guide part 2 is provided inside the lining material 1. The lining material 1 is shown in FIG.
As shown in the perspective view of FIG. 1, the felt collar 3 and the felt tube 4 joined to the felt collar 3 are formed. The felt collar 3 and the felt tube 4 are made of a woven or non-woven fabric of a synthetic resin impregnated with a thermosetting resin, and the center of the felt collar 3 has a size according to the diameter and shape of the main pipe connecting portion of the mounting pipe to be constructed. The hole 5 has an elliptical shape. The felt tube 4 has an outer diameter of 90 to 100% of the inner diameter of the mounting tube, and is bonded to the felt collar 3 by heating or sewn. The guide part 2 has a flexible and rigid rod-shaped body 6 and a guide part 7 provided at the tip of the rod-shaped body 6. The guide portion 7 has a convex curved surface having, for example, a spherical surface, a hemispherical surface, or a cylindrical surface at a tip portion. The rod-shaped body 6 of the guide portion 2 is inserted into the interior of the lining material 1 from the felt brim 3, and the rear end is lightly bonded to the inner surface of the rear end of the lining material 1 with a rubber-based low melting point adhesive or the like. It is integrated with the lining material 1.

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

As shown in the sectional view of FIG. 4, the lining work tool 12 is provided with a lifting / lowering / pressurizing means 14, a holding part 15,
And a control unit 16. The holding part 15 has a semi-cylindrical shape having a convex surface on the upper part, an inner plate 17 having a guide hole 18 at the center corresponding to the diameter of the main pipe connection port of the branch pipe, and a lower part of the guide hole 18 of the inner plate 17. And a guide pipe 19 attached in a curved manner. The seal portion 16 has an outer tube 21 connected to an end of the guide pipe 19 by a fixing member 20 and a water stop plate 22 attached to the other end of the outer tube 21. The water stop plate 22 is provided with a drawing hole for the fluid supply hose 23 and a mounting hole for the fluid discharge hose 24. The lifting / pressing means 14 includes a pair of lifting / lowering hydraulic cylinders 25 for lifting / lowering the inner contact plate 17 and a pressing hydraulic cylinder to which a reaction force clamp 26 for applying a pressing force in a direction opposite to the upward direction of the inner contact plate 17 is attached. 27.

Then, the outer surface of the lining material 1 is covered with a seal tube 8 as shown in the sectional view of FIG. 5, and a holding portion is formed through a guide hole 18 of an inner connecting plate 17 of the lining work tool 12 in the manhole. 15 and the collar of the seal tube 8 and the felt collar 3 of the lining material 1 are arranged on the upper surface of the inner plate 17. Thereafter, the fluid supply hose 23 is inserted into the seal tube 8 covering the lining material 1 by inserting the fluid supply hose 23 from the inlet hole of the water stop plate 22 attached to the rear end of the outer envelope tube 21 of the seal portion 16. Connecting. Next, as shown in the sectional view of FIG. 5, the distal end of the outer wrapping tube 21 is connected to the rear end of the guide pipe 19 of the holding unit 15 with the fixture 20, and the holding unit 15 is sealed.

In this state, the hydraulic device 13 built in the automatic traveling vehicle 11 is driven by an external remote control device, and travels to a predetermined main pipe connection position of the mounting pipe 31, as shown in FIG. Stop. Thereafter, the felt collar 3 on the upper surface of the inner contact plate 17 of the lining work tool 12 is adjusted to the position of the main pipe connection port while checking with a television camera or the like (not shown).

When the alignment of the felt collar 3 is completed, the pressurized oil is sent to the pressurizing hydraulic cylinder 27 and the elevating hydraulic cylinder 25 of the lining work tool 12, and the pressurizing hydraulic cylinder 27 and the elevating hydraulic cylinder 25 are advanced. As shown in the sectional view of FIG. 6, the felt brim 3 on the upper surface of the inner connecting plate 17 is
Press on the inner surface. In addition, a synthetic resin pipe 32 lined on the inner surface of the main pipe 30 is formed in advance.

In this state, the flow path of the fluid discharge hose 24 attached to the water stop plate 22 of the seal portion 16 is shut off, and pressurized fluid such as compressed air is sealed from the fluid supply hose 23. The liquid is supplied into the holding part 15 sealed by the part 16. By supplying the pressurized fluid, the seal tube 8 and the felt tube 4 of the lining material 1 are sequentially inverted and inserted into the mounting tube 31 as shown in FIG. I do. When the lining material 1 is inverted and inserted into the mounting pipe 31 in this manner,
By reversing and advancing the lining material 1, the rod-shaped body 6 of the guide portion 2 inserted into the lining material 1 is automatically pushed forward. Further, a pressurized fluid is supplied to advance the reversing surface of the lining material 1, and as shown in the cross-sectional view of FIG. 5, the tip end of the extruded guide portion 2 reaches the bent portion 31 a of the mounting pipe 31,
When the guide portion 7 of the guide portion 2 hits the inner surface of the mounting tube 31, the guide portion 7 of the guide portion 2 becomes a rod-shaped body 6 having flexibility and rigidity.
Of the mounting pipe 31, the rod-shaped body 6 is advanced along the inner surface of the mounting pipe 31 and the rod 6 is bent.
Curved according to the shape of a.

When the reversing surface of the lining material 1 advances in this state, the guide portion 7 of the guide portion 2 advances along the outer inner surface of the mounting tube 31 due to the rigidity of the rod 6 as shown in the sectional view of FIG. However, the rod-shaped body 6 has a bent portion 3 so as to pass through the shortest distance.
It curves near the inner peripheral side of 1a. Therefore, the bent portion 3
The reversing force of the reversing portion on the inner peripheral side of the rod-shaped body 6 of the lining material 1 in 1a is suppressed, and the reversing portion on the outer peripheral side is easily reversed. For this reason, there is a difference in the amount of advance of the reversing portion on the inner peripheral side and the outer peripheral side of the lining material 1, and the reversing portion of the lining material 1 can be easily bent and advanced along the rod-shaped body 6, and It can easily pass through the bent portion 31 without resistance.
This operation is repeated for each bent portion of the mounting pipe 31, and the inverted portion of the lining material 1 is advanced into the mounting pipe 31.

Further, after supplying the pressurized fluid and inverting and inserting most of the lining material 1 into the mounting tube 31, the heating pressurized fluid is supplied from the fluid supply hose 23 and the fluid discharge hose 24 is supplied.
Circulate for a certain period of time. When the heating and pressurizing fluid is supplied, the adhesive bonding the lining material 1 and the rod-shaped body 6 is melted, the guide portion 2 is separated from the lining material 1, and the sealing tube 8 is also inverted as shown in the sectional view of FIG. Then, the end of the lining material 1 is pressed against the inner surface of the mounting tube 31. Then, the felt collar 3 and the felt tube 4 of the lining material 1 are circulated by the circulating heated and pressurized fluid.
Is heat-cured 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 pressurized fluid for a predetermined time, the inside of the holding section 15 is returned to normal pressure, and then the fluid supply hose 23 is drawn out to remove the seal tube 8 from the felt tube 4. After peeling, the pressurizing hydraulic cylinder 27 and the elevating hydraulic cylinder 25 are retracted to lower the holding portion 15, and the inner contact plate 17 is separated from the felt collar 3. Then, the autonomous vehicle 1
After running the vehicle 1, the guide portion 2 is collected and preparations for the next operation are started.

In the above embodiment, the rod 6 of the guide portion 2 is used.
The above description has been made of the case in which the end of the lining material 1 is bonded to the end of the felt tube 4 of the lining material 1, but the lining material 1 is inserted into the felt tube 4 by the pressure of the pressurized fluid for inverting and inserting the lining material 1. Since the bar 6 is fixed to the felt tube 4, the end of the bar 6 of the guide portion 2 may be inserted into the end of the felt tube 4 of the lining material 1.

[0022]

As described above, according to the present invention, when the lining material is inverted and advanced into the branch pipe, the lining material is attached to the distal end of the rod-shaped member having the flexibility and rigidity of the guide portion by the inversion of the lining material. Since the inner surface of the branch pipe is moved forward by following the curved surface of the guiding portion, the rod is curved along the shape of the bent portion of the branch pipe, and the reversing portion of the lining material is advanced along the curved rod. The inverted portion of the lining material can pass through the bent portion of the branch pipe without resistance, and the lining material can be easily inverted and inserted into a small-diameter, highly bent branch pipe.

Also, since the guide portion for guiding the reversing portion of the lining material may be directly attached to the lining material, other auxiliary equipment for guiding the reversing portion is not required, and the lining work can be performed efficiently. Can be.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view showing a lining device.

FIG. 4 is a sectional view showing a lining work tool.

FIG. 5 is a cross-sectional view showing a state in which the lining work tool has been moved to a main pipe connection port.

FIG. 6 is a cross-sectional view showing an inverted state of the lining material.

FIG. 7 is a cross-sectional view showing an inverted state of the lining material at a bent portion.

FIG. 8 is a sectional view showing a final step of the lining operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lining material 2 Guide part 3 Felt brim 4 Felt tube 6 Bar-shaped body 7 Guide part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-20885 (JP, A) JP-A-63-3934 (JP, A) JP-A-57-65479 (JP, A) JP-A-58-58 180890 (JP, A) JP-A-58-174779 (JP, A) JP-A-60-141527 (JP, A) JP-A-62-107926 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) B29C 63/00-63/48 F16L 55/16

Claims (1)

(57) [Claims] 1. A guide rod having a guide portion having a convex curved surface at a tip end of a rod having flexibility and rigidity, and a thermosetting resin resin having a flange at one end. Insert the inside of the flexible cylindrical lining material impregnated from the collar, press the collar of the lining material to the inner surface of the main pipe connection of the branch pipe,
A reversing lining method characterized in that the lining material is inverted and inserted into the branch pipe while the guide part of the guide part follows the inner surface of the branch pipe.