JPS63224925A - Lining method for inside of tube and device therefor - Google Patents

Abstract

PURPOSE:To simplify lining operation, by a method wherein after a lining tube has been inserted into a tube, a spreading member of the lining tube is inserted to spread it further. CONSTITUTION:A lining tube 21 is sent into a tube 36 while applying an //adhesive agent to an external circumferential surface of the lining tube 21 by an application device 40 for the adhesive agent. Then a spreading member 23 is inserted into the lining tube 21 under a state where the diameter of the spreading member 25 is reduced by an operation body 24. Then an end part of the lining tube 21 is clogged, the inside of the lining tube 21 is made to have negative pressure and the diameter of the spreading member 23 is reduced further by the lining tube 21. The operation body 24 is pulled out under this state. As closure of the end part of the lining tube 21 is released after pulling-out of the operation body 24, the lining tube 21 is spread by widening outward in a radius direction of the spreading member 23 through bouncing force. The lining tube 21 is pressed sufficiently against an inner circumferential surface of the tube 36 and the same does not hang down.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for lining the inner surface of a pipe, such as an underground pipe for transporting city gas, tap water, etc., with a lining tube, and an apparatus therefor. .

Background technology A typical prior art is shown in FIG.

Inside the pipe 1, a lining tube 3 whose inner surface is coated with adhesive 2 is reversed by fluid pressure as indicated by an arrow 4, so that the lining tube 3 is inverted as indicated by a reference numeral 3a. It is fixed to the inner surface of the tube 1.

The problem with this prior art is that it is necessary to maintain internal pressure within the lining tube 3a lined on the inner surface of the pipe 1 until the adhesive 2 hardens, otherwise the adhesive 2 will not harden!81! Until the lining tube 3a is peeled off from the inner surface of the pipe work, the construction time becomes longer.

Other prior art! #18 As shown in Figure 18, a liquid synthetic resin 6 is applied inside the tube 5, and the Vig 7 is blown with compressed air or the like as shown by the arrow 8.

The problem with this prior art is that when the synthetic resin 6 is prepared on site and two innings are performed, defects such as pinholes are likely to occur in the lining layer 9 formed on the inner surface of the g5, resulting in a lack of reliability.

Yet another prior art is shown in FIG.

A two-inning tube 11 is inserted into the inner surface of the tube 10,
A spiral spring 1 is installed on the inner surface of the second lining tube 11.
2 is provided. The spring 12 is connected to the lining tube 11
is pressed against the inner surface of the tube 10.

In such prior art, if a part of the pipe 10 has a large diameter part or a bent part, a flow passage cross-sectional area smaller than the inner diameter of the pipe 10 will eventually be formed. Therefore, it is not possible to line the entire inner circumferential surface of the tube 10 with the lining tube 1. Furthermore, with this prior art, it is difficult to insert the spring 12 into a yio having a bent portion. .

Other prior art is shown in Figure #20. In this prior art, a pipe 13 is lined with a lining tube 14, and a spring 1 is placed inside the lining tube 14.
5 is embedded. The lining tube 14 is pressed against the inner peripheral surface of the tube 13 by the ribs 15 . The second prior art also has the same problem as the prior art shown in FIG. 19 described above.

Problems to be Solved by the Invention An object of the present invention is to provide an inner surface 2 of a pipe which allows the lining work to be easily performed and which allows the lining tube to be lined over the entire inner peripheral surface of the pipe. An inning method and a device used therefor can be provided.

Means for Solving the Interval Z Point The present invention provides for lining an expandable member whose outer diameter is reduced at the same time as or after inserting a lining tube into a pipe to be lined. This is a method for lining the inner surface of a tube, which is characterized by inserting the expanding member into the tube and expanding the outer diameter of the expanding member after the insertion.

Further, in the present invention, the proximal ends of the curved pieces extending in the circumferential direction are connected, and the first and second locking parts are respectively formed on the raised/free ends of the proximal ends, and the curved pieces extend outward in the radial direction. an expanding member having an elastic force to open the expanding member; and an expanding member extending in the ring line direction of the expanding member, passing through the first and second locking portions to lock them to each other, and from the first and second locking portions. This is a lining tube Kawanami rM device characterized in that it includes: (a) a flexible gripping body that releases the locked state when released;

Function According to the present invention, simultaneously with or after inserting the lining tube, the expanding member is inserted into the lining tube in a state where the outer diameter of the expanding member is reduced. After this insertion, the outer diameter of the expanding member is expanded. This makes it possible to press the outer circumferential surface of the lining tube against the inner circumferential surface of the tube to be lined. In this way, the lining work can be performed easily, and the lining tube is fixed to the inner circumferential surface of the tube by interposing an adhesive between the outer circumferential surface of the lining tube and the inner circumferential surface of the tube. First, there is no need to maintain fluid pressure within the lining tube, and in this respect, the construction is also easy and the time required for construction is shortened.

In addition, in the lining tube expansion device, the curved piece is connected at its base layer portion, and by releasing the locking portions of the first and second locking portions formed at the base end portion and/or the free end. , it is possible to press the lining tube elastically against the inner surface of the tube. This makes it possible to press the lining tube over the entire inner circumferential surface of the tube even when the tube has different diameter portions or bent portions, and the cross-sectional area of the flow path is restricted to a small size. It never happens.

Embodiment FIG. 1 is a perspective view of an embodiment of the present invention. - The lining tube 21 is flexible and made of synthetic resin material. A lining tube expansion device 22 is inserted into the lining tube 21 . The expansion device @ 22 includes an expansion member 23 and a hand operation body 24 .

FIG. 2 is a developed view of the expanding member 23. This expanding member 23 is made of a thin plate of metal or the like having elasticity. The expanding member 23 has a plurality of curved pieces 25 extending in the circumferential direction of the lining tube 21 and spaced apart along the axial direction of the lining tube 21 . The proximal ends 26 of these curved pieces 25 are connected in the axial direction by a connecting piece 27. At the free end 28 of the curved piece 25, a pair of locking parts 29 curved in a semicircular arc shape are formed near both ends of the curved piece 25. Another semicircular arc-shaped locking portion 30 is formed between adjacent curved pieces 25 and continuing to the connecting portion 27 . When the curved piece 25 extends in one plane, the openings of the locking parts 29,30 are opposite to each other.

A protrusion 31 is formed at the free end 28 of the curved piece 25 and extends along the curved piece 25. This protrusion 31 is
It is arranged between the locking parts 29 forming a pair.

A stopper 32 formed by cutting and bending is provided at an intermediate position of the curved piece 25. This stopper 32 is a curved piece 25
It is open toward the proximal end 26 of.

FIG. 3 is a sectional view for explaining one embodiment of the process of the present invention. Holes 37, 38 are drilled over the distance of the pipe 36 buried in the ground 35 to be lined.

In FIG. 3(2), the cable 39 is passed through the pipe 36.

Next, as shown in Figure 1#3 (3), an adhesive is applied to the outer peripheral surface of the lining tube 21 on the hole adjustment 38 side using an adhesive application device 40.

Reference numeral 41 connects the end of the lining tube 21 to the cable 39.
Concatenate as shown. The cable 39 is then pulled in the direction of the arrow 42 in the hole 37. As a result, the lining tube 21 whose outer peripheral surface is coated with adhesive enters into the tube 36, resulting in the state shown in FIG. 3 (4). The expansion WR device 22 may be inserted into the lining tube 21 as shown in FIG. 1 (1) in the state shown in FIG. ! 22 is inserted into tube 36. Alternatively, after inserting the lining tube 21 into the tube 36 as shown in FIG. 3 (4), expand it into the lining tube 21! 15!22 may be inserted.

In the expansion device i22, the curved piece 25 is curved into an arc shape,
The operating body 24 is interposed between the locking parts 29 and 30. The curved piece 25 has a resilient force that expands outward in the radial direction, so the operating body 24 is held between the locking parts 29 and 30. In this way, the expansion member 23 is placed inside the lining tube 21.
The curved piece 25 is held in a curved state by the operating body 24, and is therefore inserted in a reduced diameter state.

Next, as shown in m3 diagram (5), hole adjustment 3711Il
The end portion 43 of the lining tube 21 is bound or otherwise closed. On the hole adjustment 38 side, the 2-inning tube 21
The end of the conduit 45 is connected to the end 44 of the pipe. A vacuum pump 46 is connected to the pipe line 45 .

In this way, the lining tube 2 is removed by the vacuum pump 46.
By creating a negative pressure inside 1, the expansion member 23 is opened by the lining tube 21 as shown in FIG. 4(2).
is contracted radially inward.

Therefore, the locking portions 29,30 are separated from the outer periphery of the operating body 24. In this state, the operating body 24 is connected to the lining tube 21.
The hole 38Il is pulled out in the axial direction of the hole 38Il.

The state in which the operating body 24 is pulled out is shown in FIG. 3 (6).

After pulling out the operating body 24, the lining tube 21 is able to release the radially outward elasticity of the curved piece 25 of the expansion member 23 by unblocking the jacks 43 of the lining tube 21 and opening the end 44 to the atmosphere. The force expands and expands radially outward. As a result, the lining tube 21 is pressed against the inner peripheral surface of the tube 36.

In this way, the lining tube 21 is fixed to the inner circumferential surface of the tube 36 by the adhesive applied to its outer circumferential surface.

The expansion raid 1 member 23 connects the lining tube 21 to the pipe 3.
Since it is pressed against the inner peripheral surface of G, the lining tube 2
There is no danger that 1 will sag due to insufficient adhesive strength, this way! The lining work of lining the inner surface of 3G with the lining tube 21 is 1! ! It is done on a stool.

? When fluid such as water enters through small holes caused by corrosion of the F3G, the lining tube 21,
A radially inward force therefore acts on the expansion member 23. At this time, the protrusion 31 comes into contact with the stopper 32, and therefore the state shown in FIG. 4(4) changes from the state shown in FIG. 4(5). This prevents the curved piece 25 of the expanding member 23 from being further reduced in diameter.

The adhesive applicator shown in FIG. 3 (3) above (!
The specific configuration of 40 is shown in FIG.

This adhesive applicator 40 includes an 8 in which adhesive 47 is stored.
It has a length of 440m. Through holes 48 and 49 through which the lining tube 21 is inserted are formed in the container 40m.

As the two-inning tube 21 passes through the insertion holes 48 and 49, the adhesive 47 is applied to the outer peripheral surface of the lining tube 21. Since the expanding member 23 whose diameter has been reduced using the operating body 24 is inserted in advance into the second-inning tube 21 in the state shown in FIG. An adhesive 47 can be applied to the outer peripheral surface of the tube 21. Inside the lining tube 21, as mentioned above, there is an expanded rfR11r! It is also possible to apply adhesive to the outer circumferential surface of 122 without it being inserted.

In FIG. 6, the operating body 24 is pulled out and the lining tube 21 is opened using the expanding member 23. 36 is a simplified cross-sectional view showing a state in which it is pressed and fixed to the outer circumferential surface of No. 36. When the tube 36 has a large diameter section 50, the expansion member 23
The curved piece 25 expands the diameter of the lining tube 21 along the inner peripheral surface of its large diameter portion 50. In this way, it is possible to tightly press the lining tube 21 against the inner circumferential surface of a so-called different-diameter tube, in which the inner diameter of the tube 36 is different, and to line the tube 9 with the lining tube 21 . Such excellent effects of the present invention are due to the above-mentioned 19th
The coil spring 12 described in connection with FIG.
This is something that cannot be achieved with advanced technology equipped with 15 features. Further, even in a curved portion of the tube 36, the lining tube 21 can be pressed against the entire inner peripheral surface of the curved tube 36 by the curved piece 25. This does not reduce the cross-sectional area of the flow path.

FIG. 7 is an enlarged view of the expanding member 51 according to another embodiment of the present invention, and FIG. 9 shows a state in which the operating body 24 is mounted on the 11 member 51, and FIG. This embodiment is similar to the above, and corresponding parts are denoted by the same □- reference signs.
What should be noted is that a pair of curved pieces 25.52 are formed with respect to the connection piece 27, extending in mutually opposite directions in the circumferential direction, and the proximal ends of these curved pieces 25.52 extend in the axial direction on the connection piece 27. connected at intervals. Curved piece 2
A locking g29 is formed on the free piece 28 of No. 5, and a locking portion 30 is formed on the connecting piece 27. A guide portion 53 for guiding another curved piece 25 is formed at a side end of the curved piece 52. The curved piece 52 is in contact with the protrusion 31 and the curved piece 2
A stopper 54 is formed to prevent 5.52 from contracting in diameter. The locking portions 29, 30 lock onto the guide [53, thereby preventing the curved pieces 25, 52 from expanding to an unnecessarily large diameter, thereby preventing damage to the lining tube 21. In between, as in the previous embodiment, the operating body 24 shown in FIG. 8 is used.
By locking the operating body 24 between the locking portions 29 and 30, the curved piece 25 is closed.

52 is prevented from expanding in the radial direction.

FIG. 10 is a perspective view of a portion of another embodiment of the invention.

This embodiment is similar to the embodiment shown in FIGS. 7-9. The curved piece 25 is formed with a locking portion 55 that pairs with the locking portion 930 formed in the connecting portion 27, and these locking portions 30.55 hold the operating body 24 in the locked state. It can be done. Lining is perfect! When water or the like enters into W36 and the lining tube 21, and thus the curved piece 25.52, is displaced radially inward and reduced in diameter, the notch 56 formed in the gA portion of the curved piece 25
is locked to the guide piece 53. With this, the curved piece 25.5
This prevents the curved pieces 25 and 52 from being displaced in the direction of diameter reduction, thereby preventing the curved pieces 25 and 52 from shrinking in diameter due to external pressure such as water.

FIG. 11 is a perspective view of another embodiment of the invention. The expanding member 57 and the massaging body 24 constitute an expanding device 58.

FIG. 12 is a developed view of the expanding member 57. This expansion member 57 includes a pair of curved pieces 59,60. Curved piece 59
．． 60 extend in mutually opposite directions in the circumferential direction of the lining tube 21 and form a pair.

The proximal ends 61 and 62 of the curved pieces 59 and 60 are connected adjacent to each other in the loop line direction at the connecting piece 63. Curved piece 59.6
0 free pieces 64, 65 are formed with locking portions 66, 67. This curved piece 59.60 is curved into an arc shape,
By locking the operating body 24 with the locking pieces 66, 67, the curved pieces 59, 60 are kept in an arc shape as shown in FIG.

f:tS13 diagram is an enlarged rfI4MS of another embodiment of the present invention.
It is a perspective view of a part of material 68. In this embodiment, a curved stopper 70 is formed on the curved piece 69.

This stopper 70 limits the diameter reduction of the curved piece 69. A locking portion 71 is formed on the free piece of the curved piece 69, and another locking portion 72 is formed corresponding to this locking portion 71. The other configurations are similar to those of the previous embodiment.

FIG. 14 is a perspective view of a portion of still another embodiment of the present invention.
A notch 75 is formed in one curved piece 73, and a locking part 7 that covers the side of the curved piece 73 is formed in the other curved piece 74.
6 is formed. The rest of the structure is similar to the embodiment shown in FIG. 10 described above.

FIG. 15 is a sectional view of another embodiment of the process of the present invention, and corresponds to the work step shown in FIG. 3 (5) described above.

The lining tube 21 is inserted into the pipe 36,
Inside this lining tube 21 is an expansion device 1123.
is inserted. Lining chew 121 (r)jI'
fs43 ha! It is closed together with the end plate 77 at the prepared hole 37 of F3G. The end of the tube 36 at the orifice 38 is
Ill! by another end plate 78! It is played. An end 44 of the lining tube 21 at the perforated hole 38 is exposed to the atmosphere.

In this state, the space 8 between the inner circumferential surface of the tube 36 and the outer circumferential surface of the two-inning tube 21 is passed from the professional amateur 9 through the conduit 80.
By pumping air into the second inning tube 21 and, therefore, the expansion member 23 by making this space 81 a positive pressure.
can be reduced in diameter.

This allows the operating body 24 to be easily pulled out. After pulling out the operating body 24, the above-mentioned figure 3 (7)
The lining tube 21 can be pressed against the inner circumferential surface of the tube 36 by the expanding member 22 in the same manner as in the state shown in FIG.

The experimental results of the inventor of the present invention will be described. Figure 16: Length! , the work required to line the lining tube 21 according to the embodiment shown in #S1 to FIG. Time and the reduction rate of the cross-sectional area of the flow path after completion of such lining compared to before lining were measured. In addition, experiments in the prior art shown in FIGS. 1 to 6 were conducted. The results are shown in table m1.

Table 1 According to these experimental results, it can be seen that in the present invention, the reduction rate of the cross-sectional area of the flow path is small, and moreover, the working time can be shortened.

The inventor of the present invention also claims that the straight pipe 82 shown in FIG.
Table 2 shows the experimental results when the lining tube 21 was lined with the configuration shown in FIGS. 1 to 6 in a pipe having an elbow 83, a straight pipe 84, an elbow 85, and a straight pipe 86. .

Table 2 also shows the results of experiments conducted using the configurations shown in Figures tj & 17 to Figure 20.

Table 2 From this, it can be seen that even when lining a pipe with a bent portion, according to the present invention, the reduction rate of the cross-sectional area of the flow path is small and the working time can be shortened.

Effects As described above, according to the present invention, the outer diameter of the expansion member is reduced and inserted into the lining tube.
Even if there is a so-called different diameter portion where the inner diameter of the lining Fk tube changes, or even if there is a bent portion, the expanded RM member can be easily inserted into the lining tube. Further, even if there are different diameter portions and bent portions of the tube that should be covered twice, the cross-sectional area of the flow path can be prevented from becoming small. In addition, since the lining tube was pressed against the inner surface of the tube by the expanding member, the above-mentioned Fig. 17 shows 15IJ! ! There is no need to maintain internal pressure until the adhesive hardens as in the prior art described above, thus reducing installation time. Further, in the present invention, an adhesive may not be used.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. #2 is a perspective view showing the expanded state of the expansion member 23, and Fig. 3 is a sectional view for explaining the steps of the embodiment of the present invention. , FIG. 4 is a sectional view perpendicular to the axis of the two-inning tube 21 and the expansion device 22, and FIG.
The figure is a sectional view showing a specific configuration of the m-adhesive application device 40,
FIG. 6 shows that the lining tube 21 is opened by the expanding device 22.
7 is an expanded illusion view of the expansion member 51 according to another embodiment of the present invention, and FIG. 8 is an enlarged view of the expansion member 51 shown in FIG. 7. A perspective view showing a state in which the locking parts 29 and 30 of the opening member 51 are locked, FIG. 9 is an illusion diagram of a part of the embodiment shown in FIGS. 7 and 8,
910 is a perspective view of a part of another embodiment of the present invention, No. 11
The figure is a perspective view of still another embodiment of the present invention, and FIG. 12 is a perspective view of the expansion member 57 shown in FIG. 11! FIG. 13 is a perspective view of a part of the expansion member 68 according to another embodiment of the present invention, and FIG. 14 is a perspective view of the expansion member 68 according to another embodiment of the present invention. A partial perspective view, FIG. 15 is a cross-sectional view showing the steps of another embodiment of the present invention, FIG. 16 is a simplified cross-sectional view of the tube used in the inventor's experiment, and FIG. 18 is a sectional view of another prior art, FIG. 19 is a sectional view of yet another prior art, and tJ&20 is a sectional view of another prior art. 21... lining tube, 22.58... am
Device, 23.51.57.68... Expansion member, 24.
・・Handmade work, 25, 52. 59, 60, 69, 73
．． 74...Curved piece, 27.63...Connection part, 29,
30, 66. 67. 71. 72...Latching Department Agent Patent Attorney Function Kei Section Figure 1 112 Figure 1!3 Figure 3 Figure I [Figure 5 [Figure 6\ Figure 7 Figure 8 Figure 9 Figure 10 Figure M11 Figure 12 Figure 13 Figure 68\, I! Figure 14 jl Figure 15 Figure 3117

Claims (2)

[Claims] (1) At the same time as or after inserting the lining tube into the pipe to be lined, insert an expansion member whose outer diameter is reduced into the lining tube, and after this insertion, A method for lining the inner surface of a pipe, characterized by expanding the outer diameter of an expanding member. (2) The proximal ends of the curved pieces extending in the circumferential direction are connected, and first and second locking parts are formed at the proximal ends and/or free ends, respectively, and the elasticity expands outward in the radial direction. an expanding member having a force, extending in the axial direction of the expanding member, passing through the first and second locking portions to lock each other, and disengaging from the first and second locking portions to lock the expansion member; A lining tube expansion device characterized by comprising a flexible longitudinal operating body for releasing the stopped state.