JP3084770B2 - Method and apparatus for removing liquid in a tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lining a pipeline .

2. Description of the Related Art Conventionally, pipes buried underground such as gas pipes, water pipes, and sewer pipes are repaired or repaired.
For the purpose of strong, it has been practiced to crimp an airtight lining material on the inner surface to lining .

As one of the lining method of that, impregnated with a curable liquid resin to the glass mat, it thickened the liquid resin, so-called sheet molding compound (SM
A method of using C) as a lining material, rolling it into a tubular shape, pressing it against the inner surface of a pipeline, curing it, and lining has attracted attention.

In this method, since high temperature is required to cure the SMC, pressurized steam is fed into a cylindrical SMC and heated under pressure. of staying on the bottom, that portion is delayed sufficiently heated without hardening may not be obtained sufficiently cured lining.

[0005] Therefore, in order to cure the lining material uniformly and sufficiently over the whole, it is necessary to discharge the retained drain from the inside of the pipeline.

[0006]

Conventionally, as a method for discharging a liquid such as drainage lining products staying in the lining material within the Raso a conduit, the method described in JP-A-2-194932 is known ing.

In this method, a flexible hard tube is inserted into a lining material, the tip of the hard tube is positioned at a place where the drain stays in the lining material, and the rear end is communicated with the outside air. The drain in the lining material is discharged through the hard tube.

[0008]

However, in this method, since the hard tube is pushed forward from behind, the hard tube meanders in the lining material, and the position of the tip cannot be determined. Even drainage was collected in the bottom of the reason the lining material, not necessarily with the tip of the rigid tube touches necessarily the drain, there is a possibility that not out exhaust gone through the upper part of the drain.

[0009] When the leading end of the rigid tube reaches the drain, drain rapidly flow into the rigid tube, drain
Since the gas (pressurized steam, air, etc.) in the lining material is also sucked into the hard tube together with the inner tube, the hard tube vibrates violently in the lining material, and a phenomenon occurs. As a result, the hard tube may hit the inner surface of the lining material and be damaged, and the tip of the hard tube may change due to the ramp of the hard tube, and the drain may not be discharged.

[0010] The present invention has been made in view of such circumstances, while removing reliably discharge the drain down staying in the lining material, certainly hard by heating the lining material with pressurized steam
The purpose is to make it.

[0011]

SUMMARY OF THE INVENTION Thus, the method of the present invention provides
Inside, impregnate the glass mat with the reaction-curable resin liquid
Sheet molding compound with thickened resin liquid
Insert a cylindrically-lined lining material and pressurize inside the lining material
When steam is fed in and expanded in a tubular shape along the inner surface of the pipeline,
And heat the sheet molding compound
In the method of lining pipes to be converted,
When inserting a flexible tube from one end of the conduit
In both cases, open the rear end of the tube to the outside air and
Insert the tip of the towing line inserted from the end side into the tip of the tube.
To the rear, and to the front of the connection.
Hang the tip of the tube and do not feed the pressurized steam.
While contacting the tube end with the bottom of the lining material
Reciprocate inside the lining material with the tube and tow line,
Drain trapped in the lining material through the tube
It is characterized by being issued.

In the present invention, the tube is semi-hard.
The soft tube is connected to the tip of the soft tube.
Then, a weight is attached to the tip of the soft tube,
Connect the tow line to the connection between the hard tube and the soft tube
And it is recommended that the soft tubing be suspended in the lining material .
No.

[0013]

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

[0014] Figure 1 shows a state where the lining by heating the lining material while removing drain of I in the upholstery Ri in the methods of the present invention.

In FIG. 1, reference numeral 1 denotes a pipeline,
The manholes 2 are formed at predetermined intervals.

Reference numeral 3 denotes a lining member made of a cylindrical SMC, which is inserted into the pipe 1 between the manholes 2, and operation pipes 4, 4 ′ are attached to both ends of the lining material. Have been. The lining material 3 is not limited to those made of SMC, but may be a woven fabric, a nonwoven fabric, a plastic tube, or the like, and an adhesive applied to the outer surface thereof.

One end of each of the operation tubes 4 and 4 ′ is inserted into the lining material 3. The other end of each of the operation pipes 4 and 4 ′ is branched into two branches, and a valve 7 is attached to one of the branch pipes 6 , and the valve 7 is connected to an air supply pipe 8 in one of the operation pipes 4. The other operation tube 4 'is open .

Reference numeral 9 denotes a semi-rigid tube. Semi rigid tubes 9, while having a degree of flexibility that can change direction to follow the bending of the pipeline 1, or severely meandering in crushed or the lining material 3 by an external force It has such rigidity that it does not occur.

Examples of the tube such as this, the high-density polyethylene, polypropylene, a plastic such as nylon 12, relatively and thick-walled tubes suitable, it is also possible to use metal flexible tube. The outer diameter of the semi-rigid tube 9 is suitably about 5 to 20% of the inner diameter of the pipe line 1 to which it is applied.

The tip of the semi-rigid tube 9 is
The lining material 3 passes through the other branch pipe 10 of one operation pipe 4
And the rear part is drawn out of the manhole 2.

FIG. 2 is an enlarged view showing the structure of the tip of the semi-rigid tube 9 in the lining material 3.

In FIG. 2, a flexible tube 12 is connected to a tip of the semi-rigid tube 9 via a bent tube 11. A weight 13 is attached to the distal end of the soft tube 12, and the weight of the weight 13
2 hangs down.

The soft tube 12 hangs down easily in the lining material 3 due to the weight of the weight 13, and has such flexibility that the tip thereof can always be located at the bottom of the lining material 3. Is suitably soft rubber, polyurethane or the like. It is preferable that the distance from the upper part of the bent tube 11 to the tip of the soft tube 12 is slightly larger than the inner diameter of the conduit 1.

A tow line 14 is connected to the bent pipe 11. The towing line 14 passes through the lining material 3,
The other operation pipe 4 ′ is drawn out of the manhole 2 through the branch pipe 10.

The semi-rigid tube 9 and the tow line 14 are movable in the operating tube 4, 4 'in the longitudinal direction thereof.
It is hermetically sealed.

The semi-rigid tube 9 and the soft tube 12
And, if you choose something with appropriate hardness and flexibility ,
The same tube can be used. In this case, bend
Without using the tube 11, as shown in FIG.
Attach tow line 14 at a position slightly behind the end of the tube
You may.

[0027]

Next, drainage is discharged according to the present invention based on FIG.
A method of heating the inside of the lining material 3 while curing the lining material to harden the lining will be described.

The operation pipes 4 and 4 'are attached to both ends of the lining material 3 and sealed, and pressurized steam is fed from the air supply pipe 8 to inflate the lining material 3 and press it against the inner surface of the pipe 1 while heating. To cure the SMC. During this curing process, the pressurized steam condenses in the lining material 3 and the drain 15 stays.

Then, the semi-rigid tube 9 and the tow line 14 are alternately pulled from both ends of the lining material 3 to form a bent tube 11.
Is reciprocated over the entire length of the lining material 3. At this time, the soft tube 12 hangs down from the bent tube 11 due to the weight of the weight 13, and its tip moves along the bottom of the lining material 3.

If the drain 15 stays in the middle of the movement, the drain 15 is sucked from the distal end of the soft tube 12 by the pressure in the lining material 3 and discharged to the outside through the semi-rigid tube 9. Is done. When the drain 15 starts discharging, the movement of the tool is stopped, and all the drain 15 staying at that position is discharged.

When the pressure in the lining material 3 is not enough to discharge the drain 15, the semi-rigid tube 9 may be suctioned by a pump at the rear end and may be positively discharged.
It is possible .

At this time, as described in the prior art, gas components such as pressurized steam are sucked from the distal end of the soft tube 12 together with the drain 15, so that the soft tube 12 may vibrate violently and violently. is there. However, in the present invention , the bent pipe 11 is attracted by the semi-rigid tube 9 and the tow rope 14 from both measurements, and the ramp is located before the connection between the semi-rigid tube 9 and the tow rope 14.
Only the soft tube 12, the bent tube 11 or semi-rigid
The quality tube 9 itself does not move. Therefore, unlike the prior art, the tube does not move so much that the position of the drain 15 is missed.

Further, even if the soft tube 12 is greatly defeated,
Since the tip is always urged to hang down from the bent pipe 11 and its tip always tries to touch the drain 15, if the movement of the bent pipe 11 is stopped, the drain 15 staying at that position is stopped.
Can be completely discharged.

The drain 15 stays at a position in the path of the pipe 1 which is lower than before and after the position. Therefore, if the semi-rigid tube 9 and the towing line 14 are drawn from both measurements, the bent tube 11 will always be located at the upper part in the lining material 3 and the soft tube 12 will not face up or sideways. Instead, the flexible tube 12 always hangs downward, and the tip of the soft tube 12 is always at the bottom of the lining material 3, so that the retained drain 15 does not pass without being discharged.

However, at a position higher than the periphery of the pipe 1, the tip of the soft tube 12 may not necessarily follow the bottom of the lining material 3, but the drain 15 stays at such a position. There is no problem because there is no.

After the drain 15 stagnating at the surface is removed in this way, the curved tube 11 is moved by attracting the semi-rigid tube 9 and the tow line 14 again, and a position where the drain 15 stagnates is searched. .

[0037]

Therefore, according to the present invention, the drain 15 retained in the lining material 3 can be reliably discharged and removed, and the temperature of the lining material 3 does not become uneven, and the SM
It is not a name that causes the C curing failure of.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a pipe is lined by a method of the present invention.

FIG. 2 is a side view of a distal end portion of a tube according to the present invention.

[Explanation of symbols]1 ... pipe 3 ... lining
Lumber  9: Semi-rigid tube 12: Soft
Quality tube 13 ... weight 14 ...
Towing line 15 ……Drain

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B08B 9/02 B29C 63/34

Claims (2)

(57) [Claims] (1) A reaction hardened by a glass mat in a pipe (1).
Sheet resin impregnated with styling resin liquid and thickening the resin liquid
Lining compound (3)
And pressurized steam is fed into the lining material (3).
(1) Inflate into a tube along the inner surface and heat
And curing the sheet molding compound
In the method of lining pipes, the lining material (3)
The flexible tube (9,
12) and insert the tube (9, 12).
Open the rear end to the outside air and insert it from the other end of the pipe (1).
The tip of the towed rope (14) is connected to the tube (9, 12).
From the tip of the
The tip of the other tube (12) is hung down,
Line the tip of tube (12) while feeding steam
While contacting the bottom of the material (3), the tube (9, 12)
The inside of the lining material (3) is moved by the towing line (14),
Through the tubes (9, 12) into the lining material (3)
Discharging accumulated drain
Tension method 2. The method according to claim 1, wherein said tube is a semi-rigid tube.
The flexible tube (12) is connected to the tip of
Weight (13) at the tip of the soft tube (12).
The semi-rigid tube (9) and the soft tube
That the tow line (14) was connected to the connection with (12).
The method for lining a pipeline according to claim 1, characterized in that: