JPS62152727A - Method of disposing lining in pipe - Google Patents

Abstract

PURPOSE:To efficiently dispose a lining material with neither elongation nor breakage in a pipe and make it possible to perform the predetermined lining operation after disposition of the lining material without trouble by a method wherein the intermediate part of a band-shaped lining material is wound round a pulling mechanism disposed in a pipe and the pulling mechanism is advanced by successively veering out the lining material. CONSTITUTION:A rope 5 is pulled manually by winch or the like by veering out a lining material through a manhole 3a so as to advance a pulling mechanism 4. With the advancement of the pulling mechanism, idling wheels 44 rotate in the directions indicated with the arrows Y and at the same time rollers 41... rotate in the directions same as those of the wheels 44. Consequently, the lining material 2 is veered out forwards, resulting in forward shift of the winding-round part (b) of the lining material 2 on the pulling mechanism 4. At this time, under the state that one end of lining material 2 is tightly fixed to the end of a pipe, the intermediate part of the lining material 2 hangs down from the end part (c) of the winding-round part to the pulling mechanism 4 so as to be successively and silently seated onto the bottom (d) of the pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for disposing a lining material applied to the inner surface of a pipe such as a sewer pipe into the pipe as a pre-lining operation.

[Conventional technology]

As a method of lining the inner surface of a pipe such as a sewage pipe, a tube-shaped lining material made of an uncured ultraviolet curable or thermosetting synthetic resin is placed inside the pipe, and then the lining material is supplied with air by a predetermined means. There is a method in which the lining material is inflated and pressed against the inner surface of the tube, and then the lining material is cured by ultraviolet irradiation or heating. When deploying lining material into a pipe using this method, especially when applying it to the inner lining of a small-diameter pipe that cannot be accessed by people, conventionally the lining material is pulled into the pipe while sliding on the inner surface of the pipe, and then The prescribed lining work described above was being performed.

[Problem that the invention seeks to solve]

However, the lining material used in the above lining method is generally a mixture of UV-curable or thermosetting polyester resin with glass fiber (hereinafter referred to as FRP), and the uncured material is soft. It is easy to tear. Therefore, when the lining material is pulled into the pipe while sliding on the inner surface of the pipe as described above, a tensile force sufficient to resist the frictional force is required, and there is a high risk that the lining material will stretch or tear during this process. be. Furthermore, if there are irregularities or protrusions inside the pipe, the lining material may get caught on these irregularities or protrusions and be torn. This tendency is remarkable when the lining material is made long enough to cover a long range of the inner surface of the tube.

The present invention solves these problems, and even if the lining material is made of a material that is easily stretched or torn, the lining material can be efficiently deployed inside a pipe without stretching or tearing. The purpose is to enable predetermined lining work to be performed without any hindrance after deployment.

[Means for solving problems]

In order to solve the above problems, the lining material deployment method of the present invention involves wrapping the middle part of the band-shaped lining material around a tension mechanism installed inside the pipe, and fixing one end of the lining material to a predetermined location inside the pipe. By advancing the above-mentioned tension mechanism while sequentially paying out the lining material in the state of
The gist is to move the portion of the lining material wrapped around the tension mechanism forward.

[For production]

According to the above means, as the tensioning mechanism moves forward, the lining material wound around the tensioning mechanism hangs downward from the end of the winding, and is sequentially and quietly placed on the tube bottom.

In this case, only its own weight acts on the lining material hanging down from the tensioning mechanism, and no other forces act on it.

Moreover, if the speed at which the lining material is fed out as the tensioning mechanism moves forward is synchronized with the speed at which the tensioning mechanism moves forward, the tensile force acting on the lining material becomes extremely small. For these reasons, according to the lining material deployment method of the present invention, the lining material can be deployed within a pipe without applying a large tensile force to the lining material.

In addition, the lining material is wrapped around a tension mechanism,
The part that hangs down from the winding end of the tensioning mechanism is placed on the tube bottom, while the part that is fed out to the tensioning mechanism is sent over the tensioning mechanism and does not come into direct contact with the tube bottom, so there is no unevenness or protrusion inside the tube. This prevents the lining material from getting caught.

〔Example〕

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

FIG. 1 shows an initial state in which a lining material 2 is disposed in a sewer pipe 1, which is an example of a pipe, and FIG. 2 shows a state in which the lining material 2 is disposed inside the pipe.

As shown in FIG. 1, the lining material 2 is a manhole 3a.
A tension mechanism that is inserted into the sewer pipe 1 through the sewage pipe 1, one end of which is placed at a predetermined location within the pipe, for example, at the pipe end A, and which is folded back at the intermediate part, with the folded part disposed inside the sewage pipe 1. It is wrapped around the tip of 4. Also,
A portion of the lining material 2 rearward of the folded portion is placed on the tension mechanism 4. A cable 5 such as a wire or a string is led into the sewer pipe 1 from another manhole 3b, and its tip is fixed to the tension mechanism 4. As is clear from FIG. 1, FIG. 5, and FIG. Idling wheels 44, 44 are provided on the left and right sides of. When such a tensioning mechanism 4 is pulled by the cable body 5, the idle wheels 44; 44 roll on the inner surface of the pipe and move forward.

From the state shown in FIG. 1, when the lining material 2 is fed out through the manhole 3a and the rope body 5 is pulled with a winch or human power, and the tensioning mechanism 4 is advanced, the idle wheels 44 of the tensioning mechanism move forward. Rotate in the direction of arrow Y,
At the same time, the rollers 41... rotate in the same direction. Therefore, as shown by the arrow X in Fig. 6, the lining material 2
is fed out forward, and the opening of the wrapping portion of the lining material 2 relative to the tension mechanism 4 moves forward. At this time, one end of the lining material 2 is fixed so as not to move from the pipe end.

By doing this, the middle part of the lining material 2 will be connected to the tension mechanism 4.
It hangs downward from the winding end part C, and is placed gently on the tube bottom 2 one after another.

In this case, only its own weight acts on the lining material 2 hanging down from the tensioning machine jJI4, and no other forces act on it. Moreover, if the speed at which the lining material 2 is fed out as the tensioning mechanism 4 moves forward is synchronized with the speed at which the tensioning mechanism 4 moves forward, the tensile force acting on the lining material 2 becomes extremely small. Therefore, the lining material 2 can be placed inside the pipe without applying a large tensile force to the lining material 2. Furthermore, since the lining material 2 fed out to the tip of the tensioning mechanism 4 is sent over the rollers 41 of the tensioning mechanism 4, the lining material 2 does not get caught on unevenness or protrusions inside the pipe, and the lining material 2 is Can be pulled using tensile force. Therefore, when the length of the sewer pipe 1 to be lined is long, for example, when lining a range of about 50 to 100 m, the tension mechanism 4 is configured by a connected body of a large number of rollers 41 as described above, It is particularly advantageous to place the lining material 2 on the rollers 41 and send it out. However, if the length of the sewer pipe 1 to be lined is not very long and the lining material 2 can be fed out by sliding over the lining material 2 placed on the pipe bottom 2, the tension mechanism 4 is constructed to be short. Depending on the circumstances, such a sending method may be used. Even in that case, the lining material 2 only slides on the lining material 2 placed on the tube bottom 2 and does not come into direct contact with the tube bottom 2, so there is no possibility that the lining material 2 will get caught on unevenness or protrusions inside the tube. There isn't.

When the tensioning mechanism 4 is advanced to the other end of the sewer pipe 1, a predetermined length of lining material 2 is placed on the bottom 2 of the pipe as shown in FIG. Through the above steps, the lining material 2 is placed inside the pipe. After this, move on to the lining work.

The lining material 2 is made of an FRP tube made of UV-curable or thermosetting polyester resin mixed with glass fiber. Since such uncured FRP is sticky and difficult to handle, as shown in Fig. 7, protective films 2a and 2b such as poval (PVA) film are retained on both the inside and outside surfaces to improve its handling. It is desirable to improve it. As can be inferred from FIG. 6, such a lining material 2 is wound around the tension mechanism 4 in the form of a belt made by folding a tube-like material into a long flat shape.

The lining work is performed, for example, according to the following procedure.

That is, as shown in FIG. 3, both ends of the tubular lining material 2 are closed with box-shaped boxes 10 and 10, an air supply hose 11 is connected to one box 10, and air is supplied from this air supply hose 11. By inflating the lining material 2 with air, the lining material 2 is pressed against the inner surface of the sewer pipe l.

When the lining material 2 is UV curable,
Thereafter, the ultraviolet ray irradiation device 12, which has been placed in the box 10 in advance, is run inside the lining material 2, and the lining material 2 is irradiated with ultraviolet light to be cured. Next, the remaining end of the lining material 2 that protrudes from the sewer pipe l and protrudes into the manholes 3a and 3b is cut off. When the lining material 2 is UV-curable as described above, the protective film 2a on the inner surface of the lining material 2 described in FIG. 7 is made colorless and transparent, while the protective film 2b on the outer surface is made white. Then, after the ultraviolet rays irradiated from the ultraviolet irradiation device 12 pass through the lining material 2, they are reflected by the protective film 2b and irradiate the lining material 2 again, so the amount of light irradiated to the lining material 2 increases. This has the advantage that the lining material 2 hardens in a short time, allowing the lining work to be carried out quickly.

On the other hand, if the lining material 2 is thermosetting, a heater may be provided inside the lining material 2 instead of the above-mentioned ultraviolet irradiation device to heat and harden the lining material 2. .

[Effects of the Invention] As is clear from the above description, according to the present invention, a large tensile force is not released to the lining material, and the lining material does not get caught on irregularities or foreign objects in the pipe, so that the lining material is It will not stretch or tear and will be easily and securely deployed within the tube. Therefore, when the lining material is long, this method is more effective than the conventional method of sliding the lining material on the inner surface of the pipe.

[Brief explanation of drawings]

Figures 1 and 2 are schematic cross-sectional views for explaining an embodiment of the method of the present invention, Figure 3 is a schematic cross-sectional view of a vessel for explaining crawling work, and Figure 4 is a schematic cross-sectional view of a sewage pipe that has been lined. 5 is an enlarged sectional view taken along line A-A in FIG. 1, FIG. 6 is a sectional view taken along line BB in FIG. 5, and FIG.
The figure is a partial sectional view showing the lining material. DESCRIPTION OF SYMBOLS 1... Sewer pipe, 2... Lining material, 4... Tension mechanism, Mouth... Winding part.

Claims (1)

[Claims] (1) Wrap the middle part of the band-shaped lining material around the tensioning mechanism installed inside the pipe, and move the tensioning mechanism forward while sequentially paying out the lining material with one end of the lining material fixed at a predetermined location inside the pipe. A method for disposing a lining material in a pipe, the method comprising: moving a portion of the lining material wrapped around the tension mechanism forward.