JPH0732479A - Pipe lining material and reversing method thereof - Google Patents

Abstract

PURPOSE:To provide a pipe lining material, capable of being reversed simply without employing any exclusive device, and the reversing method thereof. CONSTITUTION:The non-lining section (a section, not employed for lining) 1A is worked so as to have a different diameter from a lining section 1a section used for lining). One end of the non-lining section 1A of the pipe lining material 1 is reversed and fixed, then water is poured into the reversed part of the pipe lining material 1 to form a sealed space, defined by water, while compressed air is supplied into the sealed space to reverse the pipe lining material 1 by the pressure of the compressed air. The pipe lining material 1 itself is utilized as a vessel whereby an exclusive reversing device is not necessitated and the contraction of a working space as well as cost down can be contrived. On the other hand, the non-lining section IA of the pipe lining material 1 is worked so as to have a different diameter from the other section of the material 1 whereby the saving of water to be poured thereinto, reduction of the pressure of the compressed air and the like can also be contrived.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining material used in a pipe repairing method and a method for inverting the pipe lining material.

[0002]

2. Description of the Related Art A pipe repairing method for repairing an aged pipe buried in the ground by lining the inner peripheral surface of the aged pipe without excavating the pipe is already known. Is performed by inserting a pipe lining material, which is made by impregnating a curable resin into a flexible resin absorbent material, into a pipe line while inverting it by fluid pressure.

By the way, when a compressed gas that is easy to handle is used as the fluid pressure for inverting the pipe lining material, it is necessary to store all of the pipe lining material in a closed container due to the problem of the sealing property, and especially for the pipe lining material. Dimensions (caliber,
When the length and the thickness are large, there is a problem that the closed container becomes large. Therefore, the present applicant forms a closed space partitioned by a liquid in the container, allows the liquid in the container to pass through the pipe lining material, and allows the unreversed portion to face the closed space, and to supply compressed gas to the closed space. A reversing method and a reversing device for supplying and reversing the pipe lining material by the pressure of this compressed gas have been previously proposed (Japanese Patent Application No. 2-54587).

In addition, in an apparatus including an annular fixing portion for fixing a pipe lining material and a U-shaped tower behind the annular fixing portion which is filled with a liquid through an induction pipe, air pressure is applied to the inside of the induction pipe to form a pipe. A method of reversing the lining material has also been proposed (Japanese Patent Application No. 62-212464).

Thus, according to the above method or device, the liquid fulfills the function of sealing the closed space, and the pipe lining material does not need to be entirely housed in the closed space. To be done.

[0006]

However, even in the method and apparatus according to the above-mentioned proposal, a large container is required for reversing a pipe lining material having a large diameter, and a great labor is required for its transportation and installation. At the same time, there is a problem that a large installation space is required, which causes an increase in size and cost of the device. In addition, since a large amount of liquid is required in a large container, a large pressure acts on the container, which makes it necessary to keep the strength and rigidity of the container as a thick material to keep its strength and rigidity high.
As a result, the weight and cost of the container increase.

On the other hand, when reversing a small-diameter pipe lining material, it is necessary to keep the internal pressure of the device relatively high.
The height of the device becomes high, which leads to an increase in size and cost of the device.

The present invention has been made in view of the above problems, and an object thereof is to provide a pipe lining material that can be easily inverted without using a dedicated device and a method for inverting the pipe lining material. It is in.

[0009]

In order to achieve the above object, the present invention is characterized in that a portion of a pipe lining material that is not used for lining is machined to have a different diameter from other portions.

Further, according to the present invention, one end of a portion of the pipe lining material that is not used for lining is inverted and fixed, and a liquid is injected into the inversion portion of the pipe lining material so that the inversion portion is partitioned by the liquid. It is characterized in that a closed space is formed, a compressed gas is supplied to the closed space, and the pipe lining material is inverted by the pressure of the compressed gas.

[0011]

In the present invention, since the pipe lining material itself is used as a container and the liquid is used to form a sealed space in the reversing portion, a dedicated reversing device is not required, and the construction space is reduced and the cost is greatly reduced. Can be achieved.

Further, since the portion of the pipe lining material according to the present invention that is not used for lining is processed to have a different diameter from the other portion (portion used for lining), for example, in a pipe lining material having a large diameter, , If the diameter of the portion not used for lining is made small, when forming the closed space by reversing the portion not used for lining, the amount of liquid to be injected into the pipe lining material may be small, Workability is further enhanced.

On the other hand, in the case of a small-diameter pipe lining material, if the diameter of the portion not used for lining is increased, the friction of the curved portion of the pipe lining material at the time of reversal is reduced and the necessary reversal pressure is reduced. Therefore, the pressure of the compressed gas supplied to the closed space can be reduced.

[0014]

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

1 to 4 are partial perspective views of a pipe lining material 1 according to the present invention. The pipe lining material 1 shown in FIGS. 1 and 2 is for a large diameter (that is, for lining an old pipe having a large diameter). The pipe lining material 1 shown in FIGS. 3 and 4 is for a small diameter (that is, for lining an old pipe having a small diameter).

Each of the pipe lining materials 1 is made of polyethylene, nylon-polyethylene copolymer, EVA, polypropylene or the like on the outer peripheral surface of a tubular flexible resin absorbent material 2 made of a nonwoven fabric such as polyester, acrylic, nylon or polypropylene. The tube-shaped film 3 is adhered and coated.

Thus, in each of the pipe lining materials 1, a portion having a predetermined length L from the end thereof is a portion (hereinafter referred to as non-lining portion) 1A which is not subjected to lining, and the non-lining portion 1A. Is another part (a part provided for lining, which is hereinafter referred to as a lining part) 1
The diameter is different from that of B. That is, in the pipe lining material 1 for large diameter shown in FIGS. 1 and 2, the diameter of the non-lining portion 1A is set smaller than the diameter of the lining portion, and the pipe for small diameter shown in FIGS. In the lining 1, the diameter of the non-lining portion 1A is set to be larger than the diameter of the lining portion. The pipe lining material 1 shown in FIGS. 1 and 3 has the non-lining portion 1A provided eccentrically with respect to the center of the lining portion 1B, and the pipe lining material 1 shown in FIGS. The non-lining portion 1A is provided concentrically with the lining portion 1B.

By the way, as shown in FIG. 5, each pipe lining material 1 (in the illustrated example, the pipe lining material 1 shown in FIG. 1)
In the above, the non-lining portion 1A may be formed separately from the lining portion 1B, and this may be joined to the end portion of the lining portion 1B. At this time, the structure (material) of the non-lining part 1A and the lining part 1B does not have to be the same. For example, the non-lining part 1A is formed by coating the woven fabric 2A with the film 3, and the lining part 1B is formed by the felt 2B. May be coated with the film 3.

The pipe lining material 1 having the resin absorbent 2 has been described above, but the pipe lining material according to the present invention includes a tubular bag body having airtightness such as a pre-liner containing no resin absorbent. Is included.

Next, a method of reversing the pipe lining material 1 will be described with reference to FIGS. 6 to 10. 6 to 1
Reference numeral 0 is an explanatory sectional view showing the inversion method in the order of steps.

First, as shown in FIG. 6, one end of the non-lining portion 1A of the pipe lining material (in this embodiment, the pipe lining material for a large diameter shown in FIG. 1 or 2) 1 is inverted and Is fixed to a cylindrical frame body 6, and water 7 is injected into the inverted portion. Then, as shown in FIG. 7, the non-lining portion 1A of the pipe lining material 1 falls while being inverted by the own weight of the water 7, and the inversion and the fall are stopped when the inverted end contacts the ground 8. A fluid bag 9 that can expand and contract is set on the ground 8, and a compressor (or pump) 10 is connected to the fluid bag 9.

Next, as shown in FIG. 7, the pipe lining material 1
Tie a rope 11 to the part near the ground 8 of this rope 1
1. If the inversion end of the pipe lining material 1 is pulled in the direction of the arrow shown in FIG. 1, the inversion end of the pipe lining material 1 is bent at a substantially right angle as shown in FIG. Further inverted along 8 and mounted on the fluid bag 9 as shown.

Next, the compressor (or pump)
10 is driven to supply compressed air (or pressurized water) to the fluid bag 9 to expand the fluid bag 9,
When compressed air is supplied into the water 7 in the pipe lining material 1 from the hose 12 inserted in the pipe lining material 1,
As shown in FIG. 3, the non-lining portion 1A of the pipe lining material 1 is deformed into a U shape, and a closed space S partitioned by the water 5 is formed at its inverted end portion. The closed space S is filled with air.

After that, the closed space S in the pipe lining material 1 is
If compressed air is further supplied from the hose 12 to the non-lining portion 1A of the pipe lining material 1, the non-lining portion 1A is further inverted.
As shown in FIG. 0, the fluid bag 7 is crossed over and it is inverted and inserted into the aged pipe 13. At this time, the non-lining portion 1A of the pipe lining material 1 is deformed into a horizontal S shape as a whole as shown in the drawing.

After that, if the compressed air is continuously supplied from the hose 12 to the closed space S, the pipe lining material 1 is sequentially inserted into the aged pipe 13 by being reversed. At this time, the water 7 in the pipe lining material 1 has Δh = P / γ shown in the figure.
(P is the internal pressure of the closed space S, and γ is the specific weight of the water 7).

As described above, in the method of the present invention, the pipe lining material 1 itself is used as a container of a conventional reversing device to form the closed space S partitioned by the water 7 in the pipe lining material 1. Therefore, a dedicated reversing device is not required, and the construction space can be reduced and the cost can be significantly reduced.

In the large-diameter pipe lining material 1 used in this embodiment, the diameter of the non-lining portion 1A is set smaller than the diameter of the lining portion 1B, so that the non-lining portion 1A is inverted. When the closed space S is formed inside the lever, the amount of water 7 to be injected into the non-lining portion 1A is small, and workability is further enhanced.

On the other hand, in the small-diameter pipe lining material 1 shown in FIG. 3 or 4, since the diameter of the non-lining portion 1A is set larger than the diameter of the lining portion 1B, it is reversed as shown in FIG. The curved portion a of the pipe lining material 1 at the time of
Since the friction of b is reduced and the required reversal pressure is reduced, the pressure of the compressed air supplied to the closed space S can be reduced.

By the way, as shown in FIGS. 12 and 13, the length L of the non-lining portion 1A of the pipe lining material 1 is such that the lining work (reversal and pressure) is performed within the portion arranged outside the aged pipe 13. Long enough to hold),
The non-lining portion 1A does not necessarily have to be impregnated with a curable resin, and may have a predetermined pressure resistance and airtightness.

Next, FIG. 14 shows a pipe lining material 1 according to a second embodiment of the present invention. In the pipe lining material 1, another strip-shaped film 4 is interposed between the film 3 of the non-lining portion 1A. The both ends in the width direction are adhered to each other, leaving a space 5 therein, and the space 5 constitutes a gas passage through which compressed air should pass, as described later.

When the non-lining portion 1A of the pipe lining material 1 is inverted, the space (gas passage) 5 is formed in the inner peripheral portion of the non-lining portion 1A of the pipe lining material 1 as shown in FIG. Since it is formed, if compressed air is supplied into the water 7 in the pipe lining material 1 through the space 5, the non-lining portion 1A of the pipe lining material 1 is transformed into a U shape as shown in FIG. However, a closed space S partitioned by the water 7 is formed at the inverted end thereof.

After that, the closed space S in the pipe lining material 1 is
If the compressed air is further supplied to the non-lining portion 1A of the pipe lining material 1 by the space, the non-lining portion 1A of the pipe lining material 1 is further inverted.
As shown in FIG. 5, the fluid bag 9 is passed over and the inverted pipe is inserted into the aged pipe 13. At this time, the non-lining portion 1A of the pipe lining material 1 is deformed into a horizontal S shape as a whole as shown in the drawing.

After that, if the compressed air is continuously supplied from the space 5 to the closed space S, the pipe lining material 1 is successively inserted into the aged pipe 13 so as to be reversed.

As described above, even if the pipe lining material 1 shown in FIG. 14 is used, the same effect as described above can be obtained, but the space 5 to be the gas passage is formed in advance in the pipe lining material 1. Therefore, the connection between the closed space S and the compressed gas supply source such as the air compressor is simplified, and the reversal can be advanced with good workability.

The space can be formed in any pipe lining material 1 shown in FIGS. Further, in the above embodiments, the hose 12 and the space (gas passage) 5 are shown as means for supplying the compressed air to the closed space S, but as another means, the pipe is directly inserted into the pipe lining material, and the pipe is inserted. It is also possible to employ a method of supplying compressed air to the closed space via the above.

[0036]

As is apparent from the above description, according to the present invention, since the pipe lining material itself is used as a container and a closed space is formed by the liquid in the reversing portion thereof, a dedicated reversing device is not required. Therefore, it is possible to obtain the effects that the construction space can be reduced and the cost can be significantly reduced.

Further, according to the present invention, the portion of the pipe lining material that is not used for lining is processed to have a different diameter from the other portion (the portion that is used for lining), so that, for example, a pipe lining material having a large diameter is used. In, if the diameter of the part not used for lining is made small, the amount of liquid to be injected into the pipe lining material is small when the part not used for lining is inverted to form a closed space inside thereof. The workability is further improved. And, in a small-diameter pipe lining material, if the diameter of the portion not used for lining is increased conversely, the friction of the curved portion of the pipe lining material at the time of reversal is reduced and the necessary reversal pressure is reduced. The pressure of the compressed gas supplied to the closed space can be reduced.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a pipe lining material according to the present invention.

FIG. 2 is a partial perspective view of a pipe lining material according to the present invention.

FIG. 3 is a partial perspective view of a pipe lining material according to the present invention.

FIG. 4 is a partial perspective view of a pipe lining material according to the present invention.

FIG. 5 is a partial perspective view of a pipe lining material according to the present invention.

FIG. 6 is an explanatory sectional view showing the method of the present invention in the order of steps.

FIG. 7 is an explanatory sectional view showing the method of the present invention in the order of steps.

FIG. 8 is an explanatory sectional view showing the method of the present invention in the order of steps.

FIG. 9 is an explanatory sectional view showing the method of the present invention in the order of steps.

FIG. 10 is an explanatory sectional view showing the method of the present invention in the order of steps.

FIG. 11 is an explanatory cross-sectional view showing a reversed state of the small-diameter pipe lining material.

FIG. 12 is an explanatory sectional view showing the length of the non-lining portion of the pipe lining material according to the present invention.

FIG. 13 is an explanatory cross-sectional view showing the length of the non-lining portion of the pipe lining material according to the present invention.

FIG. 14 is a partial perspective view of a pipe lining material according to a second embodiment of the present invention.

15 is an explanatory cross-sectional view showing a method of reversing the pipe lining material shown in FIG.

16 is an explanatory cross-sectional view showing a method of reversing the pipe lining material shown in FIG.

17 is an explanatory cross-sectional view showing a method of reversing the pipe lining material shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pipe lining material 1A Non-lining part (part not used for lining) 1B Lining part (other part) 2 Flexible resin absorbent 3, 4 film 5 Space (gas passage) 7 Water (liquid) 9 Fluid bag 12 Hose S closed space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 592057385 Shonan Plastics Co., Ltd. 31-27 Daikanmachi, Hiratsuka-shi, Kanagawa (71) Applicant 000004455 Hitachi Chemical Co., Ltd. 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo No. 1 (71) Applicant 592008538 Towa Sangyo Co., Ltd. 1610-64 Kami Sokata, Oita City, Oita Prefecture (71) Applicant 591240951 Yokoshima Co., Ltd. 175-3 Shinoyama, Ishishita Town, Yuki District, Ibaraki Prefecture Inventor Sakura Okura Tokyo 3-11-11 Nihonbashihonmachi, Chuo-ku, Tokyo Sanritsu Construction Co., Ltd. (72) Inventor Hiroyuki Aoki, 4 stock company all at 1-194 Hayashi, Tokorozawa, Saitama Prefecture (72) Inventor Takato Torii, Tokyo Port 2-4-25 Hamamatsucho, Ward Okasan Kogyo Co., Ltd. (72) Inventor Shigeru Endo 1431 Tomita, Iwai City, Ibaraki Prefecture Getta Inc. (72) Inventor God Takao 31-27 Daikancho, Hiratsuka-shi, Kanagawa, Shonan Plastics Co., Ltd. (72) Inventor, Kazuyuki Tanaka, 4-13-1, Higashi-machi, Hitachi, Ibaraki, Hitachi Chemical Co., Ltd. (72) Inventor, Sato Junichi 1610-64 Kamisomata, Oita City, Oita Prefecture, Howa Sangyo Co., Ltd. (72) Inventor, Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita Town, Yuki District, Ibaraki Prefecture Yokoshima Co., Ltd.

Claims (7)

[Claims] 1. A pipe lining material obtained by processing a portion that is not subjected to lining so as to have a different diameter from other portions. 2. The pipe lining material according to claim 1, wherein the portion that is not subjected to the lining is configured separately from the other portion and is joined to the other portion. 3. The pipe lining material according to claim 1, wherein a gas passage is formed of a film in a portion which is not subjected to the lining. 4. The pipe lining material according to claim 1, wherein one end of a portion of the pipe lining material that is not used for lining is inverted and fixed, and a liquid is injected into the inversion portion of the pipe lining material to be partitioned by the liquid in the inversion portion. A method for reversing a pipe lining material, characterized in that a closed space is formed, a compressed gas is supplied to the closed space, and the pipe lining material is inverted by the pressure of the compressed gas. 5. A hose is inserted into the inversion portion of the pipe lining material, one end of the hose is exposed to the closed space, and a compressed gas is supplied to the closed space through the hose. The pipe lining material reversing method according to claim 4, wherein the pipe lining material is inverted. 6. The compressed gas is supplied to the closed space through the gas passage formed in the inner periphery of the inversion portion of the pipe lining material according to claim 3, and the pipe lining material is inverted by the pressure of the compressed gas. The method of reversing a pipe lining material according to claim 4, wherein the pipe lining material is inverted. 7. The method of reversing the pipe lining material according to claim 4, wherein an air bag is arranged at the bottom of the reversal portion of the pipe lining material when the closed space is formed.