JPH0677964B2 - Inner pipe lining method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pipe inner surface lining method for lining a water intake device near a water pipe interposed in the pipe for transporting city gas or the like with a lining tube.

BACKGROUND ART In the middle of a pipe for transporting a fluid such as city gas, a water intake device for storing water invading from the outside is interposed in the pipe. This water intake device has a storage part at its lower part and stores the water that has entered the pipe. The water catcher is provided with a vertically extending vertical pipe whose tip extends to the reservoir. By suctioning this standpipe with a suction pump, or by inserting a flexible hose into the standpipe and sucking it with the suction pump with the tip of the hose positioned in the reservoir. Therefore, the water in the reservoir can be discharged.

When such a water taker is no longer needed,
Excavate the ground to form a pit and expose the water catcher. Then, the water catcher and the end of the pipe connected to the water catcher are cut off, and the water catcher is removed. Then, the cut ends of the pipe are connected to refill the vertical hole.

Another prior art technique drills a pit to expose near the top of the water catcher and fills the reservoir of the water catcher with synthetic resin or cement grout. Therefore, the pit is backfilled.

Problems to be Solved by the Invention Such prior art obviously requires a great deal of labor. In particular, when the water catcher is located under a road or the like, it hinders traffic, is dangerous, and is subject to work time constraints.

An object of the present invention is to provide a method for lining the inner surface of a pipe in the vicinity of a water catcher, which has improved workability and does not need to excavate a large vertical hole in the ground.

Means for Solving the Problems The present invention is directed to a vertically extending vertical pipe water taker having a tip located in a water catcher interposed in the middle of a pipe for transporting a fluid. The inner part is cut off, the storage part of the water intake is filled with the filling material, and the lining tube is fluid-pressure-reversed to line the water intake and the pipe extending to both sides of the water intake. A pipe inner surface lining method is characterized in that, after the lining, a space between the inner peripheral surface of the water intake device and the outer peripheral surface of the lining tube is filled with a filler.

Action According to the present invention, the part of the vertical pipe protruding into the water intake device is cut off, and the storage portion formed in the lower portion of the water intake device is filled with the filling material. As a result, the lining tube can be reversed and run by fluid pressure from one side of the pipe connected to the water intake device. While running the lining tube, it catches on the standing pipe,
It is possible to smoothly and surely line the lining tube over the inside of the water catcher and the pipes extending on both sides of the catcher without catching on the storage part. After the lining tube is lined, the water intake device is filled with the filler, and the space between the inner peripheral surface of the water intake and the outer peripheral surface of the lining tube is filled with the filler. In this way, when the water catcher is no longer needed, it is possible to prevent leakage of fluid such as gas from the water catcher.

Embodiment FIG. 1 is a sectional view showing a water intake device 1 and its vicinity in which the present invention is implemented. Pipes 3 and 4 for transporting a fluid such as city gas are buried in the ground 2, and a water catcher 1 is interposed in the middle of these pipes 3 and 4. The water catcher 1 serves to store water that has entered the pipes 3 and 4 in a storage portion 5 that is recessed downward. The water catcher 1 is provided with a vertical pipe 6 extending vertically. The tip 6a of the standing pipe 6 extends to near the bottom 7 of the storage section 5. The upper end 6b of the standing pipe 6 is housed and protected in a small pit 8 formed on the ground 2, and is hermetically closed by a removable cap 9. According to the invention, the water intake 1 and the parts of the pipes 3, 4 in the vicinity of the water intake 1 are lined.

At the time of this lining, as shown in FIG. 2, the portion of the standing pipe 6 protruding to the water intake device 1 is cut off over a length 1 (see FIG. 1). The tubes 3 and 4 have tube axes on a common straight line and have the same cross-sectional shape. The water catcher 1 is located outside the virtual extension region 10.
As a result, the vertical pipe 6 does not become an obstacle in the water catcher 1 when the lining is applied as described later. For removing the standing pipe 6 in the water catcher 1, the standing pipe 6 is used.
The standing pipe 6 can be cut from the inner peripheral surface thereof in a circular slice shape by using a cutting blade that rotates around an axis parallel to the axis of the standing pipe 6. The portion of the standing pipe 6 in the water catcher 1 after this excision may be left in the storage part 5.

Next, as shown in FIG. 3, a flexible hose 11 is inserted from the standpipe 6 into the water intake device 1, and a filler 13 such as synthetic resin or cement grout is pressure-fed from a supply source 12. The filling material 13 is stored in the storage portion 5, and the storage portion 5 is closed. FIG. 4 shows a cross section taken along the section line IV-IV in FIG. 3 in the state where the storage material 5 is filled with the filler 13.

Therefore, as shown in FIG. 5, the pipe 3 is cut in the vertical hole 14 excavated in the ground 2, and the inner surfaces of the pipes 3 and 4 are cleaned for cleaning. For this cleaning, the wire brush 16 connected to the tip of the wire 15 is attached to the pipe 3,
By moving it back and forth in the tube along the tube axis direction, the inner surfaces of the tubes 3 and 4 are polished to remove rust. Tube instead of wire brush 16
Means for scraping the inner surface of 3, 4 may be provided and also brush 1
The 6 may be rotationally driven so that cleaning can be performed efficiently. When the wire brush 16 or the like travels in the pipes 3 and 4 for cleaning, the end 6c of the standing pipe 6 is positioned in the water catcher 1 so as not to collide with the wire brush 16. Further, the filler 13 in the water intake device 1 is hardened, so that there is no problem such as the wire brush 16 being caught in the storage section 5. Vertical hole
For No. 14, the pipe 3 should be excavated in a place not located on the road so that it will not interfere with traffic.

Next, referring to FIG. 6, a lining tube 17 made of a flexible synthetic resin or the like is run from the end of the pipe 3 of the vertical hole 14. The outer diameter of the lining tube 17 is pipe 3,
It is selected to be approximately equal to or slightly larger than the inner diameter of 4, wound on reel 18, and on the inner peripheral surface of lining tube 17,
Adhesive is applied. End of lining tube 17
The end portion of the vertical hole 14 of the pipe 3 is fixed to 17a.
It is closed by the end plate 19 in the vertical hole 4 of the pipe 3. Compressed air source
From 20, compressed air is pumped into the pipe 3 via the pipe 21, and the pressure of the compressed air causes the lining tube 17 to
The pipe 3 travels while reversing into the pipe 4 via the water intake device 1.
The state that this lining tube 17 is lined is
It becomes as shown in FIG.

Therefore, as shown in FIG. 8, a filling material such as synthetic resin or cement grout is supplied from the supply source 23 through the flexible tube 22 in the vertical tube 6.
Fill 24. The filling material 24 is filled up to above the water taker 1 of the vertical pipe 6. The filling material 24 hardens with time. Therefore, by cutting the standing pipe 6 at the position indicated by the reference numeral 25, removing the part of the standing pipe 6 above the position 25, and backfilling the soil, It is as shown in FIG. In this way
Unnecessary treatment of the water intake device can be performed, and leakage of the fluid to be transported from the water intake device 1 and its vicinity can be prevented.

Effects As described above, according to the present invention, the part of the vertical pipe in the water intake device is cut off, and the storage part is filled with the filling material. The lining tube can be lined in the water intake and the pipe connected to it.

Further, since the lining tube is designed to run in reverse with fluid pressure such as compressed air, it is not necessary to excavate a vertical hole in the water intake device as described in connection with the above-mentioned prior art, and accordingly, the When the device is located on a road or the like, traffic can be prevented from being interrupted due to excavation of a vertical hole, and smooth work can be performed.

Furthermore, after the lining tube is lined, the space between the inner peripheral surface of the water catcher and the outer peripheral surface of the lining tube is filled with the filler, so that the lining tube is protected and the inside of the water catcher is protected. The lining tube does not swell due to fluid pressure, and airtightness is ensured for a long period of time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a water intake device 1 and its vicinity in which the present invention is implemented, FIG. 2 is a cross-sectional view showing a state in which a standing pipe 6 is cut out in the water intake device 1, and FIG. 3 is a water intake device. FIG. 4 is a cross-sectional view showing a state where the storage material 5 of the container 1 is filled with the filling material 13, FIG. 4 is a cross-sectional view taken along the section line IV-IV of FIG. 3, and FIG. 6 is a sectional view for explaining the step of lining the lining tube 17, FIG. 6 is a sectional view for explaining the step of lining the lining tube 17, FIG. 7 is a sectional view showing a state in which the lining tube 17 is lined, and FIG. Filling material in the water catcher 1
FIG. 9 is a cross-sectional view showing a state in which 24 is filled, and FIG. 9 is a cross-sectional view showing a state where the treatment of the water intake device 1 according to the present invention is completed. 1 ... Water taker, 2 ... Ground, 3,4 ... Pipe, 5 ... Reservoir, 6 ... Stand pipe, 6a ... Tip, 9 ... Cap, 13, 24
…… Filling material, 16 …… Wire brush, 17 …… Lining tube

Claims (1)

[Claims] 1. A part of a vertically extending vertical pipe whose tip is located up to a reservoir of the water catcher in the water catcher interposed in the middle of a pipe for transporting a fluid. Then, the storage part of the water intake device is filled with a filler, and the lining tube is fluid-pressure-reversed and lining across the water intake device and the pipes extending on both sides thereof, and after this lining, A pipe inner surface lining method, which comprises filling a space between an inner peripheral surface of a water catcher and an outer peripheral surface of a lining tube with a filler.