JP2656677B2 - Partial repair method by lining a pipeline with a flexible hose made of a material containing curable plastic - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to repairing existing pipelines, such as underground water pipes or sewer pipes, by selecting only those areas to be repaired and using a material containing curable plastic. The present invention relates to a method for repairing by backing with a flexible hose.

[0002]

2. Description of the Related Art Conventionally, as a repairing method by non-cutting of the above-mentioned pipeline, for example, Swedish Patent Publication No. 7
No. 701289-6, or published patent publication No. 60-5
No. 01001, when lining a pipeline with a flexible hose made of a material containing a curable plastic, introduce the hose in an uncured state into the pipeline to be lined, and then cure the cured hose contained in the hose. There is disclosed a backing method for curing a conductive plastic material to form a cylindrical pipe inscribed in a pipeline to be repaired.

[0003] One example of these methods, that is, an in-pipe method (inversion method) developed by Inpipe of Sweden, will be described in order with reference to FIGS.

In each of the drawings, reference numerals 101 and 102 denote manholes, and reference numeral 103 denotes a pipeline for sewage formed of fume pipes, ceramic pipes, etc., which is to be repaired in this case. 200mm-500m
m and the length is 10 m to 60 m. At the time of construction, first, the inside of the pipe 103 is washed by the washing means 105 of the washing pipe 104 inside the pipe, as shown in FIG. Water leakage inside 103,
A check is made on the state of damage such as cracks. In this case, as shown in FIG. 7, the pipe 103 has a mounting pipe 108, and if the tip of the pipe 103 protrudes into the pipe 103, it will be an obstacle to subsequent work. 109 is introduced and deleted.
This completes the previous construction. Next, as shown in FIG. 8, a pipe 1 is inserted into the manhole 101 while a flexible hose made of an uncured plastic material is inverted by compressed air.
The uncured flexible hose introduction side device 110 of the installation device for installation on the inner surface of 03 is attached via a manhole support 111, and the manhole 102 side has a diameter corresponding to the diameter of the pipe 103 as an outlet side device. Pipe 11
2 is attached. Next, as shown in FIG. 9, the main construction is started. That is, the center 113 of the outlet of the introduction apparatus 110
As a result, the flexible hose 114 made of an uncured plastic material is sequentially expanded in diameter by compressed air (indicated by an arrow), sent out, inverted, and lined with the inner surface of the pipe 103.
As shown at 0, it reaches the upper end 114 of the rising pipe 112. In this case, the end of the flexible hose 114 having a margin longer than the length of the pipe 103 to be constructed is provided at the end of the pipe 1.
A bobbin 115 having a function of discharging air out of the system is attached in order to appropriately adjust the pressure of the compressed air in 03 and the heat generated by the radiant energy source described later by the air flow. Is provided with a rope 116 as a pulling means for introducing a curing mechanism having a radiant energy source described later, and this rope is operated by a pulling mechanism 117 as shown in FIG. 11 described later.

After the flexible hose 114 is lined with the inner surface of the pipe 103 as described with reference to FIG.
The hardening of the hose 114 is performed by a hardening mechanism having a radiant energy source connected to a rope 116 as shown in FIG. 11, and in this case, a hardening mechanism 118 having an ultraviolet lamp is operated by a traction mechanism 117. Introducing device 1
12, is drawn into the hose 114 as shown in FIG. 12, turns on the ultraviolet lamp, and moves toward the end of the pipe (to the right in the figure). The flexible hose 114 made of is cured. Until this curing is completed, compressed air is constantly introduced into the hose 114 in order to adjust the heat from the ultraviolet lamp so as not to hinder the curing of the hose 114 and to cool the heat generated from the ultraviolet lamp. And is discharged from the bobbin 115 to the outside of the system. Also in this case, the uncured flexible hose 11
Since a net made of glass fiber or the like is incorporated in 4, a hardened hose alone can sufficiently function as a sewer pipe or the like after hardening. After this, at the ends of the manholes 101 and 102,
If there is, the installation pipe drilling machine 109 is introduced into the pipe 103, the end is cut and the installation pipe is drilled, inspection is performed by a television camera or the like, and the construction is completed. The curable plastic used in this case is of an unsaturated polyester type, and an ultraviolet lamp is used as a radiant energy source for generating radicals for initiating crosslinking. A method using a lamp and an infrared heater and using a thermosetting resin is also performed. In addition to the above-mentioned method, a method of simply introducing a curable hose into a pipe and curing the same is also performed.

[0006]

As described above, in a method of repairing a pipeline for sewage or the like that does not rely on digging, for example, a repair from a manhole to a manhole (usually 10 m to 60 m) is required. Except for the case where the entire area is covered, it is the present state of the art that the entire area is uniformly constructed and repaired regardless of the area to be repaired. However, it is often sufficient to replenish only the parts to be repaired at present, where the parts to be repaired such as cracks can be reliably detected by inspection means using a television camera, etc. Flexible hoses made of materials containing curable plastics are extremely expensive and require considerable construction costs. Therefore, there is a strong demand for a method of accurately repairing only the portions to be repaired.

[0007]

The present inventors have made intensive studies to solve the above-mentioned problems, and have completed the invention. The gist of the invention is a flexible hose made of a material containing a curable plastic. In order to repair the existing pipeline such as an existing water pipe or sewage pipe placed underground, the hose is introduced in an uncured state into the pipeline to be lined, and this hose is After being pressed against the pipeline by compressed air, it is exposed to energy radiated from a curing mechanism provided with a radiant energy source to cure a flexible hose made of a material containing a curable plastic to a stable form. In the method, only a portion of the pipeline corresponding to a portion of the pipeline to be repaired is made of a flexible hose made of a material containing the curable plastic. The other hose part is formed by a water-impermeable tube which is not cured by the radiated energy, and these are formed as a unitary hose by connection, and the hose is made of a material containing a curable plastic. After the part has cured to a stable form,
There is a partial repair method by lining the pipeline with a flexible hose, which is characterized in that the portion made of the water-impermeable tube is removed from the hardened hose portion and is removed from the pipeline. After the flexible hose portion made of the material containing the material hardens to a stable form, water-stopping members are attached to both ends thereof, and / or a water-stopping material is previously provided on the pipeline side surface of the flexible hose. After the water-stopping material has functioned with the hardening of the hose, the portion comprising the water-impermeable tube is
A partial repair method using a backing of a pipeline, characterized in that it is removed from a hardened portion and removed from the inside of the pipeline.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the partial repair method of the present invention will be described with reference to the drawings. The present invention relates to an improvement of the repair method of the entire pipeline described with reference to FIGS. Yes, since the outline of the construction method does not change, the method will be described with reference to FIGS. 5 to 12, and an example in the case of implementing the water stoppage work will be separately described with reference to FIGS. 1 to 4.

As described above with reference to FIG. 5 and FIG. 6, when a portion to be repaired is selected by inspection of the pipeline, a material containing a hardening plastic having a length corresponding to the portion to be repaired can be used. A flexible hose is provided, which is made of a tube made of water-impermeable, heat-resistant plastic or fabric, connected in front and behind by an adhesive in this case to form a series of hoses. This hose is then loaded sequentially into the inlet device 110 as shown in FIG. 8 and only the flexible hose portion is lined with the inner surface of the pipeline portion to be repaired in the same manner as described in FIGS. And hardens into a stable form. Thereafter, the cured portion and the portion of the heat-resistant plastic or cloth are separated by cutting means and, if cut, by separation, and removed outside the pipeline system. The connection between the tube and the hose may be made by welding or sewing.

In the case of the above example, repair of the deteriorated part is urgently necessary. However, it is usual to perform water stoppage between the hardened hose end and the pipeline. This will be described below.

FIG. 1 shows an example of this. A hardened hose 2 is lined on the inner surface of a pipeline 1 to be repaired. A water-stopping material 3 is attached (note that the lower example in FIG. 1 is an example in which the water-stopping material 3 is provided not only at both ends but also in the middle), which is the same as described above. During the process of backing and curing the uncured hose, it swells due to water entering from the pipeline 1 side and exhibits a water-stopping function. Furthermore, both ends of the end of the hose 2 are cylindrically formed from the inside of the end. A water-stopping member 4 (trade name: Snaplock, handled by Japan Snaplock Association) consisting of a rubber sleeve having water-stop lips at both ends and an expandable cylindrical metal sleeve formed inside the rubber sleeve is attached. , Water is completely stopped. It is needless to say that the water-stopping material may be made of rubber having elasticity or this rubber and water-swellable rubber, and a commercially available material can be used.

FIG. 2 shows another embodiment of the present invention. A pipeline 5 composed of a fume tube is lined with a hose 6 in the same manner as described above. In this case, inner surfaces of both ends of the pipeline 5 to be repaired are provided. When the same water-stopping member 4 is attached before the hose 6 is lined, the required area is cut in advance so that the cut-out portion 7 is formed so as not to protrude into the pipeline 5. Therefore, when the uncured hose is lined, it is deformed and cured according to the shaved portion 7.
Further, since a concave portion is formed, the water stopping member 4 is mounted thereon. Therefore, in this case, the resistance of the fluid flowing through the pipeline 5 is reduced as compared with the case where no cutting portion is provided.

FIG. 3 shows still another embodiment. In the drawing, the portion above the one-dot chain line is provided with cutting portions 7 at both ends of a portion of the pipeline 8 to be repaired as described above. This is an example in which a waterproof material 10 made of, for example, rubber, water-swelled rubber, or rubber and water-swelled rubber is attached to both ends of the uncured hose 9 in advance. In the example in which the shaving portions 7 are provided at both ends of the line 8 and at required intermediate portions between them, a waterproof material 10 is attached to each of the shaving portions. By doing so, it is possible to perform a water stopping work according to the degree of damage to the pipe such as a crack.

FIG. 4 shows yet another embodiment, in which a cutout 7 is formed over the entire portion of the pipeline 11 to be repaired, so that the uncured hose 12 fits into this portion. Since it hardens by hardening, the resistance of the fluid flowing through the pipe 11 is not affected at all. In this case, a waterproof material is attached to the entire surface of the uncured hose 12 on the pipeline side.

[0015]

According to the repair method described above, when repairing sewer pipes, water pipes, and the like, a very long whole such as a conventional one between manholes is used by using an extremely expensive resin. Since there is no need for repair and renewal, the present invention greatly saves construction resources, not to mention saving valuable resources.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of an embodiment of a water stopping method according to the present invention.

FIG. 2 is a diagram showing an outline of another embodiment of the water stopping method.

FIG. 3 is a diagram showing an outline of another embodiment of the water stopping method.

FIG. 4 is a diagram showing an outline of another embodiment of the water stopping method.

FIG. 5 is a flow chart for explaining the steps of the repair method of the present invention in addition to the conventional method of repairing a sewer pipe, and this figure explains the cleaning of the drain pipe.

FIG. 6 is a view for explaining inspection of a sewer pipe.

FIG. 7 is a view for explaining the removal of the protruding portion at the joint between the drain pipe and the mounting pipe.

FIG. 8 is a view for explaining the installation of an uncured flexible hose introduction-side device and an outlet-side device.

FIG. 9 is a view for explaining the implementation of the construction method.

FIG. 10 is a view for explaining the implementation of the construction method.

FIG. 11 is a diagram illustrating the introduction of an ultraviolet lamp in the same method.

FIG. 12 is a view for explaining curing of a flexible hose by an ultraviolet lamp in the same method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 2 Hose 3 Waterproof material 4 Waterproof member 5 Pipeline 6 Hose 7 Cutting part 8 Pipeline 9 Uncured flexible hose 10 Waterproof material 11 Pipeline 12 Uncured flexible hose 101 Manhole 102 Manhole 103 Pipe 110 Uncured hose introduction-side device 111 Manhole support 112 Outlet-side device pipe 113 Center of outlet of device 110

Claims (10)

(57) [Claims] The present invention relates to a method for lining and repairing an existing pipeline such as a water pipe or a sewer pipe placed underground by a flexible hose made of a material containing a curable plastic. The hose is introduced in an uncured state, and the hose is pressed against the pipeline by compressed air, and then subjected to energy radiated from a curing mechanism having a radiant energy source, and a material containing a curable plastic. In a lining method for hardening a flexible hose made of a hard hose, the hose is a flexible hose made of a material containing the hardenable plastic, only a portion corresponding to a portion of the pipeline to be repaired. The other hose section is formed by an impermeable tube that is not cured by the radiated energy And these are formed as an integral hose by connection, and after the hose portion made of a material containing curable plastic is cured to a stable form, the portion made of the water-impermeable tube is cured from the cured hose portion. A method for partially repairing a pipeline by lining the pipeline with a flexible hose, which is removed and removed from the pipeline. 2. After a flexible hose portion made of a material containing a curable plastic is cured to a stable form, water-stop members are attached to both ends thereof, and / or a surface of the flexible hose on a pipeline side. 2. A water-stopping material is provided in advance, and after the water-stopping material functions, the portion made of the water-impermeable tube is removed from the hardened hose portion and removed from the pipeline. Method described in. 3. The method according to claim 1, wherein a flexible hose portion made of a material containing a curable plastic and a hose portion made of a water-impermeable tube are connected by bonding, sewing, or welding. The construction method described. 4. The method according to claim 1, wherein a notch is provided in the connecting portion. 5. The water-impermeable tube is made of heat-resistant plastic or cloth.
Or the method according to 2. 6. The method according to claim 1, wherein the radiant energy source is an ultraviolet lamp, an infrared lamp, or an infrared heater. 7. A water-stopping member comprising a rubber sleeve having a cylindrical shape and having water-stopping lips at both ends and a cylindrical metal sleeve formed inside the rubber sleeve and having an expandable diameter. Method described in. 8. The flexible hose according to claim 1, wherein said flexible hose is provided at both ends, or both ends and an intermediate portion of said flexible hose at a predetermined interval or on an entire surface thereof. The method according to 2 or 7. 9. The method according to claim 2, wherein the water-stopping material is made of rubber, rubber and water-swellable rubber, or water-swellable rubber. 10. The flexible hose to which a water-stopping member is attached and / or a water-stopping material is provided in advance, wherein a surface of the flexible hose on a pipeline side is cut in advance. The method according to any one of items 9 to 10.