JPH06221494A - Pipe line repair structure and its forming method - Google Patents

Abstract

PURPOSE:To provide a repair structure which can repair a pipe line securely and its forming method irespective of the length of the pipe line to be repaired. CONSTITUTION:IN a pipe line repair structure which has a cylindrical lining material 3 along an inner face of a pipe line 1, a rear end 3b of the lining material 3 is positioned on the halfway of the pipe line 1, and a second cylindrical repair member 31 which is bonded between the rear end 3b of the lining material 3 and an inner face of the adjacent pipe line 1 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair structure for repairing a conduit such as a drainage pipe from its inner surface side and a method for forming the repair structure.

[0002]

2. Description of the Related Art Conventionally, in the case of repairing an existing drainage pipe or the like, there is a technique in which a flexible repair material is inserted into the conduit and then cured to form a repair structure. .

As conventional repair techniques of this type, there are only two types, one for repairing over the entire length of the conduit from manhole to the other and one for repairing over a short range of less than about 2 m. It is limited, and at present the repairing technology for the pipelines over 2 m and less than the total length is not established.

[0004]

As described above, in the conventional technology, the reason why the repairing technique for the pipeline exceeding 2 m and less than the total length is not established is that the repairing is performed for the pipeline length exceeding 2 m. In the case of repair, it is impossible to insert a repair tool that can be used for repairing a short part and presses the repair material to the inner surface of the pipeline with a relatively high pressure from the manhole and cannot be used. As a result, the pressure for pressing the repair material to the inner surface side of the pipeline decreases, and the finishing work of both end portions cannot be performed in the manhole as in the case of long repair.

That is, when the conventional technique is used as it is, and the repair is performed for a pipeline exceeding 2 m and less than the total length, the end of the repair material located in the middle of the pipeline rises from the inner surface of the pipeline. As a result, it is difficult to reliably fulfill the significance of repairing the damaged portion of the pipeline as liquid-tight, and because the repair material floats up from the inner surface of the pipeline, it flows in the pipeline. This is because it also contributes to the accumulation of dust and the like, and the detachment of repair materials due to long-term use.

The present invention has been made under such circumstances, and provides a repair structure and a method of forming the repair structure that can be reliably repaired regardless of the length of the portion of the conduit to be repaired. The purpose is to do.

[0007]

In order to achieve this object, the invention according to claim 1 is a pipeline repair structure having a tubular repair material along the inner surface of the pipeline, and at least one end of the repair material is provided. Part is located in the middle of the pipeline,
The present invention is characterized in that a tubular second repair material bonded between the end portion of the repair material and the inner surface of the pipe line adjacent thereto is installed.

[0008]

According to the first aspect of the present invention, the tubular second repair material extends between the end of the repair material located in the middle of the pipeline and the inner surface of the pipeline adjacent to the end. Since these are installed by adhesion, this structure can be similarly formed at any part in the conduit.

Since the second repair material covers the end portion of the repair material, even if a slight bulge is generated at the end portion of the repair material, the liquid-tightness between the repair material and the inner surface of the conduit is formed. Since the second repair material is located inside the repair material without impairing the state, it prevents the lift of the repair material from becoming too large, and is unlikely to cause a clog in the pipeline, and the end of the repair material is Since the repair material is not directly exposed to fluid or foreign matter, there is little risk that the repair material will peel off.

Therefore, according to the first aspect of the present invention, the end portion of the repair material can be freely selected at any position of the conduit, regardless of the length of the portion to be repaired. The pipe line can be reliably repaired.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the invention of the present application will be described with reference to the embodiments shown in the drawings. For convenience of explanation, a method for forming a conduit repair structure will be described first, and then the conduit repair structure will be described. First, a first embodiment shown in FIGS. 1 to 6 will be described.

The whole process of the pipeline repair work is as shown in FIG. 2. First, the corresponding pipeline 1 is cleaned, the television camera is placed in the pipeline 1 and moved, and the repair structure is set. The position confirmation work of the construction portion P to be constructed is performed. In addition,
The pipeline 1 of this embodiment is a drainage pipe for sewage or the like.

Then, the lining material 3 is drawn into the conduit 1 through the manhole 2a on the downstream side of the conduit 1 by the winch 5 through the retracting belt 4 (see FIG. 3).

The lining material 3 corresponds to the repair material in the present invention.

The lining material 3 is formed to have a length capable of covering the construction portion P in the pipe line 1 in a tubular shape as a whole, and the lining material 3 includes the first hose material 6 and the second hose material 6. The hose member 7 and two hose members 7 and 7 are integrally formed of two layers of a base material layer made of felt-like polyester resin nonwoven fabric and an impermeable film made of polyurethane rubber. Is formed in.

The hose members 6 and 7 are double-layered so that the base material layers contact each other, and each of the base material layers is made of a thermosetting synthetic resin. The unsaturated polyester is pre-impregnated at the factory.

The lining material 3 is arranged in conformity with the construction portion P of the pipeline 1 confirmed as described above. In this embodiment, the lining material 3 is used.
Of the lining material 3 is located at the end of the conduit 1 which is open to the upstream manhole 2b, and the rear end 3b of the lining material 3 is located at the end of the conduit 1.
It is located in the middle of the middle part (in this specification, it means the part not facing the manhole) (see FIG. 5).

With respect to the lining material 3 thus arranged at the required position, the tip 3a of the lining material 3 facing the upstream manhole 2b is slightly opened as shown in FIG. Insert the part and put it on.

The spreader 8 is a member made of a flexible material formed in a long tubular shape, and is formed by coating a base material made of a felt-like polyester resin non-woven fabric and a coating on the surface thereof. 2 with impermeable membrane made of vinyl chloride
The layers are integrally formed.

The tip of the expanding tool 8 and the tip 3a of the lining material 3 are superposed in a watertight manner at the end of the conduit 1 in the upstream manhole 2b, and the tip of the expanding tool 8 is attached. The lining material 3 in a folded state.
The expansion tool 8 is inserted into the elbow pipe 11 in a state in which the elbow pipe 11 is inserted so as to cover the end of the conduit 1.

When water W as a pressurized fluid is supplied into the elbow pipe 11, the pressure force such as the head pressure of the water W is folded into a bag-shaped portion of the expanding tool 8 (hereinafter referred to as an inversion portion). 8a, the reversing portion 8a advances toward the downstream manhole 2a in the conduit 1 by supplying the subsequent portion of the expanding tool 8, whereby the lining material 3 is attached to the inner surface of the conduit 1. It is pushed out and spread (see Fig. 5).

The lining material 3 formed by the expansion tool 8
Prior to the expansion step of the water blocking member 12 on the upstream side of the pipeline 1.
And a stopper 13 for stopping the movement of the expanding tool 8 is installed in advance in the downstream manhole 2a.

Although the reversing portion 8a of the expanding tool 8 continues even after the lining material 3 has been expanded over its entire length, the reversing portion 8a of the expanding tool 8 is located inside the downstream manhole 2a. It stops in the state of contacting the stopper 13. This is for preventing the expansion tool 8 from being damaged by stopping the progress of the reversing portion 8a without applying a large tension to the expansion tool 8.

In the expanding step of this embodiment, the lining material 3 is expanded by the water W, but instead of this, compressed air pressurized to a required pressure can be used. Further, if the mounting work of the expansion tool 8 on the inside of the lining material 3 is performed in a factory, at the construction site, the inside of the expansion tool 8 mounted on the inside of the lining material 3 has a fluid pressure such as water pressure or air pressure. Is introduced and expanded to expand the lining material 3 to the inner surface of the conduit 1.

After the lining material 3 is expanded in this way, the water W as a pressurized fluid existing inside the expansion tool 8 is heated while being circulated in the boiler to become hot water of a predetermined temperature. To do.

As a result, the thermosetting synthetic resin impregnated in the lining material 3 can be accelerated and the lining material 3 can be hardened in a required time.

After the lining material 3 is appropriately hardened, the supply of hot water is stopped, the lining material 3 is cooled and cured, and the water W inside the expanding tool 8 is discharged. The expansion tool 8 is removed from the inside of the lining material 3 by pulling it from the subsequent portion side with a winch or the like.

After that, both end portions 3 of the lining material 3 are
Finish a and 3b.

That is, the tip 3a of the lining material 3
In the above, since the tip end 3a faces the upstream manhole 2b, the operator can directly finish it by using the quick-setting resin material 14 or the like.

However, since the rear end 3b of the lining material 3 is located in the middle of the middle of the pipe line 1,
This cannot be finished directly by the operator.

Therefore, in the present application, FIG. 6 and FIG.
The rear end 3b is finished by using the repair tool 21 shown in FIG.

In FIG. 6, reference numeral 20 denotes a repair device, and the repair device 20 has a repair tool 21, an air compressor 22, and a hose 23.

The repairing tool 21 of this embodiment has a cylindrical tubular member 24 at its central axis portion, and is rotatable at both ends of the tubular member 24 via stays extending downward to the outside. Two pivotally supported wheels 25 are provided.

On the outer peripheral side of the tubular member 24, a rubber sheet portion 2 in which a flexible material such as rubber is formed into a substantially cylindrical shape.
6 are attached, and both ends of the rubber sheet portion 26 are airtightly attached to the end portions of the tubular member 24 by the retaining rings 27, respectively, and between the rubber sheet portion 26 and the tubular member 24. A cylindrical expansion chamber R is formed in the.

An air hole 28 is formed in the upper portion of the inner surface of the cylindrical member 24, and the hose 23 is connected between the air hole 28 and the discharge port of the air compressor 22.

Therefore, compressed air from the air compressor 22 is supplied to the expansion chamber R of the repair device 21, and the rubber sheet portion 26 can be expanded outward in the radial direction of the conduit 1.

In the figure, 31 is a second repair material, 32 is a positioning rope for the repair tool 4, and one end of each is connected to the stay of the repair tool 21.

The second repair material 31 is a sheet-shaped base material impregnated with a synthetic resin.

A non-woven fabric or a woven fabric made of, for example, glass fibers or plastic fibers is used as the base material, and a liquid synthetic resin made of an epoxy resin is used as the synthetic resin. The base material of the second repair material 31 may be formed in a tubular shape.

The repair work of the conduit 1 using the repair device 20 thus constructed is carried out as follows.

The second repair material 31 prepared by impregnating the synthetic resin in advance is mounted on the outer periphery of the rubber sheet portion 26 of the repair tool 21.

The repair tool 21 in this state is arranged at a position facing the rear end 3b of the lining material 3 of the conduit 1. The operation of arranging the repair tool 21 is performed by positioning the positioning ropes 32 at the upstream and downstream manholes 2b and 2a located on both sides of the pipeline 1.
By pulling from both sides.

After the repair tool 21 is placed at the required position,
The air compressor 22 is operated, and the expansion chamber R of the repair device 21 is operated.
Supply compressed air inside.

Along with this, the repair tool 21 expands in the radial direction of the conduit 1 and the length around the outer periphery of the rubber sheet portion 26 increases.

Along with this, the second repair material 31 mounted on the outer peripheral surface of the rubber sheet portion 26 is expanded,
The outer peripheral surface of the repair material 31 is the rear end 3b of the lining material 3.
Is pressed against both the inner surface of the pipe 1 and the inner surface of the conduit 1. In this state, the second repair material 31 has a cylindrical shape along the inner surfaces of the conduit 1 and the lining material 3.

When the internal pressure of the expansion chamber R reaches a predetermined value due to the supply of compressed air to the expansion chamber R as described above, the supply of compressed air to the expansion chamber R continues as a constant supply state.

In this state, the internal pressure of the expansion chamber R is maintained as it is for the time required for the second repair material 31 to be completely cured, and the pressed state of the second repair material 31 is maintained. To do.

In this embodiment, the second hose material 7 forming the lining material 3 is formed shorter than the first hose material 6, and the lining material 3 is formed thin at the rear end 3b. This is the rear end 3b of the lining material 3 when the second repair material 31 is attached as described above.
This is to prevent the thick portion from being formed and to smoothly maintain the flow of the liquid in the conduit 1.

When the curing of the second repair material 31 is completed by pressing with a predetermined pressure as described above, the repair tool 21 is then used.
Evacuate the air inside.

As a result, the rubber sheet portion 26 of the repair tool 21 that has been inflated under a predetermined pressure contracts.

Due to this contraction, the rubber sheet portion 26 is peeled off from the inner surface side of the second repair material 31, and the cured second repair material 31 is left on the inner surfaces of the conduit 1 and the lining material 3 in a state of being adhered thereto. Separate as it is.

After that, by pulling the positioning rope 32, the repair tool 21 can be pulled out from the pipe line 1 into the manhole 2a or 2b, and the finishing of the rear end 3b of the lining material 3 can be completed.

After that, the television camera used for checking the construction position is inserted into the conduit 1, the construction situation of the lining material 3 is inspected, and the repair work is completed.

In the repair structure of the first embodiment thus formed, the tip 3a faces the upstream manhole 2b,
A lining material 3 made of fiber reinforced plastic, which is arranged along the inside of the pipeline 1 with the rear end 3b located in the middle of the pipeline 1, and a quick-setting resin material 14 for finishing the tip 3a of the lining material 3 And a second repair material 31 for finishing the rear end 3b of the lining material 3 (see FIGS. 1 and 6).

In the repair structure of the first embodiment,
At the tip 3a of the lining material 3, since the worker can directly perform the finishing work by using the quick-setting resin material 14 as in the conventional case, a sound repair structure can be obtained.

On the other hand, at the rear end 3b of the lining material 3, which is located in the middle of the pipe line 1, the pipe line 1 adjacent to this is provided.
The second repair material 31 having a tubular shape is adhered and installed between the inner surface and the inner surface of the second repair material 31.

Therefore, the rear end 3 of this lining material 3
b can be similarly formed at any position in the conduit 1.

At the rear end 3b of the lining material 3, the second repair material 31 covers the rear end 3b to ensure a liquid-tight state between the lining material 3 and the inner surface of the conduit 1. be able to.

In this case, since the work of forming the second repair material 31 can be performed by using the small-scale small repair tool 21, the pressing force of the second repair material 31 by the repair tool 21 is increased. It is relatively easy to set, and the space between the lining material 3 and the inner surface of the conduit 1 can be surely made liquid-tight.

Further, in the lining material 3, damages such as lifting and peeling due to aged use or the like are generally likely to occur from the end portion of the lining material 3, but as described above, the inner surface of the rear end 3b of the lining material 3 may be damaged. Since the second repair material 31 is located, the lining material 3 is prevented from rising and the clogging of the pipeline 1 is prevented, and the lining material 3 is protected from the impact of foreign matters flowing through the pipeline 1. Since this protects the lining material 3, there is an advantage that the durability of the lining material 3 is improved.

Further, as described above, the space between the lining material 3 and the inner surface of the conduit 1 is surely liquid-tight, so that water can be prevented from entering the conduit 1 from the ground. Therefore, it is possible to suppress an increase in treatment load at the sewage treatment facility.

Therefore, by using this finishing structure, the position of the rear end 3b of the lining material 3 can be freely set, regardless of the length of the construction portion P to be repaired of the pipeline 1. Only the part can be repaired reliably.

In the repair work described above, one end of the lining material 3 is located at the open end of the manhole, and only the other end is located in the middle of the pipe.
The present invention is not limited to this, and both ends of the lining material 3 may be positioned in the middle of the middle of the conduit 1 as will be described below as a second embodiment.

Even in this case, basically, the repair work may be basically performed in the same manner as described above, and in the following, only the differences from the above will be described, and the description of the items common to the above will be repeated. Absent.

That is, both end portions 3a of the lining material 3,
In the second embodiment, both 3b are installed in the middle part of the pipeline 1, and in the second embodiment, the lining material 3 used for the repair work is previously inserted into a required position of the expanding tool 36 at the factory. In this state, a synthetic resin is impregnated, and the synthetic resin is drawn into the conduit 1 for use as shown in FIG.

The expanding tool 36 is formed by integrally forming a water impermeable film made of, for example, vinyl chloride on the surface of the base material like the expanding tool 8, and is a synthetic resin impregnated into the lining material 3. This is in consideration of the convenience of peeling from.

The holding of the lining material 3 on the spreader 36 is carried out by the adhesiveness of the synthetic resin impregnated in the lining material 3 or by an adhesive having a heat deterioration property such as a vinyl acetate resin emulsion adhesive. When the repaired part of the conduit starts from the position of the distance L from the upstream manhole 2b, the lining material 3 is rearward by approximately the dimension L from the tip of the expansion tool 36, for example. This is the position closer to (see FIG. 7).

Therefore, when the expanding tool 36 is arranged in the conduit 1 and the tip of the expanding tool 36 reaches the upstream manhole 2b, the lining material 3 attached to the guide hose 36 will be described.
Is located in the construction portion P of the pipeline 1 to be repaired.

After the tip of the expanding tool 36 reaches the upstream manhole 2b, a pressurized fluid is introduced into the expanding tool 36, so that the lining material 3 of the second embodiment can be obtained.
Is expanded by the expansion tool 36 along the inner surface of the conduit 1.

In this state, the lining material 3 is heated and cooled as in the first embodiment, and then the expanding tool 36 is removed.

Since both ends 3a and 3b of the lining material 3 from which the expansion tool 36 has been removed in this way are located in the middle of the middle of the conduit 1, both ends 3a thereof in this second embodiment. , 3b, the repairing structure of the second embodiment shown in FIG. 8 is formed by performing the same finishing as the rear end 3b of the first embodiment.

In the repair structure of the second embodiment thus formed, both end portions 3a, 3b of the lining material 3 are positioned in the middle of the middle of the pipe line 1 and along the pipe line 1. The lining material 3 is arranged, and the second repair material 31 is similarly arranged on both ends 3a and 3b of the lining material 3 and finished.

In the repair structure of the second embodiment,
Both ends 3 of the lining material 3 located in the middle of the pipeline 1.
a, 3b, the end portions 3a, 3 of the lining material 3 are
Since the tubular second repair material 31 is bonded and installed between b and the inner surface of the pipeline 1 adjacent thereto, both end portions 3a and 3b of the lining material 3 are located inside the pipeline 1. It can be freely formed at any position.

Therefore, the end portion 3 of this lining material 3 is
By using the finishing structure of a and 3b, the positions of the ends 3a and 3b of the lining material 3 can be freely set in the pipe line 1, and the length of the construction portion P to be repaired of the pipe line 1 can be set. It can be repaired reliably regardless of the situation.

Also in the end finishing structure of the second embodiment, as in the case of the first embodiment, the liquid-tight state between the lining material 3 and the inner surface of the pipe 1 is secured and the lining material is secured. It is possible to expect effects such as prevention of clogging of the pipe line 1 by suppressing lifting of the pipe line 3 or improvement of durability by protection of the lining material 3 from impact of foreign matter flowing through the pipe line 1.

Further, the installation work of the second repair material 31 is performed by using the small-scale small repair tool 21, so that the pressing force of the second repair material 31 by the repair tool 21 is set high and the lining is performed. The fact that the space between the material 3 and the inner surface of the conduit 1 can be surely made liquid-tight is the same as in the case of the first embodiment.

In the second embodiment, the lining material 3 was impregnated with the synthetic resin in a state where the lining material 3 was inserted in the factory. However, instead of the expanding tool 36, a flexible synthetic resin film or the like is used. If a tubular guide hose made of is inserted into the lining material 3, the lining material 3 can be mounted while reversing the expansion tool 8 as in the first embodiment.

When the lining material 3 is mounted in this manner, the guide hose and the expansion tool 8 are removed after heating and cooling curing of the lining material 3 as in the first embodiment. do it.

[0079]

As described above, according to the invention described in claim 1, between the end of the repair material located in the middle of the pipeline and the inner surface of the pipeline adjacent to the repair material. Since the tubular second repair material is attached and installed, this structure can be similarly formed at any portion in the conduit.

Since the second repair material covers the end portion of the repair material, even if a slight bulge is generated at the end portion of the repair material, the liquid-tightness between the repair material and the inner surface of the conduit can be obtained. Since the second repair material is located inside the repair material without impairing the state, it prevents the lift of the repair material from becoming too large, and is unlikely to cause a clog in the pipeline, and the end of the repair material is Since the repair material is not directly exposed to fluid or foreign matter, there is little risk that the repair material will peel off.

Therefore, according to the first aspect of the invention, the end portion of the repair material can be freely selected at any position of the pipeline, regardless of the length of the portion to be repaired. The pipe line can be reliably repaired.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part of a first embodiment.

FIG. 2 is an explanatory diagram of a process of forming a repair structure according to the first embodiment.

FIG. 3 is an explanatory cross-sectional view of a lining material retracting step in the first embodiment.

FIG. 4 is an explanatory cross-sectional view at the start of the expanding process of the lining material in the first embodiment.

FIG. 5 is an explanatory sectional view at the end of the expanding process of the lining material of the first embodiment.

FIG. 6 is an explanatory diagram of a finishing work of an end portion of a lining material located at a midway portion of a pipe line in the end portion finishing step of the first embodiment.

FIG. 7 is an explanatory cross-sectional view of a step of drawing a lining material according to the second embodiment.

FIG. 8 is a cross-sectional view of a repair structure formed according to the second embodiment.

[Explanation of symbols]

 1 Pipeline 3 Lining Material (Repair Material) 3b Rear End 31 Second Lining Material

Front Page Continuation (72) Inventor Hideo Oki 3-25-6 Ewada, Midori-ku, Yokohama-shi, Kanagawa

Claims (4)

[Claims] 1. A pipeline repair structure having a tubular repair material along an inner surface of the pipeline, wherein at least one end of the repair material is located at a midway portion of the pipeline and the end of the repair material A pipe repairing structure, in which a tubular second repair material bonded to the inner surface of the adjacent pipe is installed. 2. A tubular repair material made of a flexible material impregnated with a synthetic resin is inserted into the pipe, and the synthetic resin is hardened by expanding the repair material along the inner surface of the pipe. In the method for forming a pipeline repair structure, the repair material is placed in the pipeline with at least one end of the repair material positioned in the middle of the pipeline, and the repair material is expanded. After that, a second repair material made of a flexible material impregnated with a synthetic resin is attached to the outer circumference of the repair tool capable of expanding in the circumferential direction, and the second repair material is placed inside the expanded end portion of the repair material. Part of the repair tool is inserted and inflated to adhere the second repair material over the inner surfaces of the repair material and the conduit, and then the synthetic resin of the second repair material is cured. A method of forming a characteristic pipe repair structure. 3. The method for forming a pipeline repair structure according to claim 2, wherein a repair material is preliminarily attached to a middle part of the expansion tool in the factory, and the repair material held by the expansion tool is inserted into the pipeline. Then, after the both ends of the repair material are positioned in the middle of the conduit together, a fluid pressure is introduced into the expansion tool to push and expand the repair material. Method. 4. The method for forming a pipeline repair structure according to claim 3, wherein the expansion tool is made of a base material having a water-impermeable membrane made of polyvinyl chloride on the surface, and is made into a bag shape. , The expansion tool, after pressing and spreading the repair material,
A method for forming a duct repair structure, characterized in that the expanding tool is removed from the repair material.