JP4436015B2 - Lining material for pipe rehabilitation and pipe rehabilitation method using this material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lining material for rehabilitating pipes used to rehabilitate water and sewage and other existing pipes, and a pipe retreading method using this lining material.
[0002]
[Prior art]
In general, fume pipes, ceramic pipes, etc. are widely used as existing pipes such as sewer pipes buried in the ground. These pipes are eroded by hydrogen sulfide and other corrosive gases and deposits, etc., due to long-term use, and are deteriorated to reduce the thickness and reduce the strength. In addition, the seam of the pipeline is displaced due to ground pressure or ground subsidence, or a gap is formed, or a crack is generated in a part of the pipeline due to an overload, etc., and groundwater or the like enters the pipeline from the gap or crack. Or, the flowing water or the like flowing through the pipe may leak into the ground. There is a possibility that earth and sand around the pipe will flow out due to the intrusion or leakage of the groundwater or the like in the pipe, and a hollow portion may be formed on the back of the pipe, thereby inducing road surface depression.
[0003]
In order to cope with such a problem, conventionally, a flexible hose containing uncured photo-curing resin or thermosetting resin is compressed into compressed air in an existing pipeline to be rehabilitated in a tube by a washing car or the like. The light irradiation device (UV lamp, visible light) that runs inside the flexible hose when using a photo-curing resin. Light is irradiated to the flexible hose by a light source, etc., and in the case of a thermosetting resin, the resin is cured by applying hot water or hot air to the flexible hose, and the inner wall surface of the pipe is impermeable. A method for rehabilitating an existing pipeline that forms a lining has been proposed.
[0004]
[Problems to be solved by the invention]
In the case of a lining material using a photo-curing resin, there is an effect that the curing speed is fast and the time required for curing is short, while the thickness of the layer that can be cured is thin, usually about 10 mm, and more There is a problem in that the curing effect is reduced and the resin that has penetrated deeply into the cracks in the pipelines is not sufficiently cured. That is, in the case of a lining material using a photocurable resin, there is an advantage that it is cured in a short time, but there is a limitation on the thickness of the lining material.
[0005]
On the other hand, in the case of a lining material using a thermosetting resin, it can be cured even for a thick lining material. However, the curing rate is slow and it takes a long time to cure.
[0006]
Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method of curing a lining material in a relatively short time even if it is thick, and to regenerate the pipeline. An object of the present invention is to provide a lining material to be used and a method for producing the lining material .
[0007]
[Means for Solving the Problems]
To achieve the above object, the invention according to claim 1 of the present invention, both of the photo-curable resin and a thermosetting resin and insert the free Mukanro rehabilitating lining material into existing conduit, A step of closely adhering to an existing inner wall surface of the pipe, and a light irradiation step of irradiating the lining material for pipe rehabilitation from the inside to cure the photocurable resin. The entire lining material for pipe rehabilitation is cured .
[0008]
According to the first aspect of the present invention, the lining material can be accurately cured only by light irradiation. When the photocurable resin contained in the lining material is irradiated with light, the resin is cured, but heat is generated during the curing. The heat also functions to cure the thermosetting resin contained in the lining material.
[0009]
Therefore, even when the lining material is formed thick or there is a portion that is not irradiated with light satisfactorily due to unevenness, the whole is efficiently cured by the generation of heat accompanying the curing of the irradiated portion. Further, since the initial curing is performed to some extent by light irradiation, the entire curing can be achieved while ensuring the rapidity of the curing. The present invention is not merely a combination of a photocurable resin and a thermosetting resin, and both light and heat treatments are performed, but the entire curing can be efficiently performed only by light irradiation. .
[0010]
In the second aspect of the present invention, the lining material used in the method of the first aspect is configured in a cylindrical shape, and a photo-curing resin is provided on the inner peripheral surface side, and a thermosetting resin is provided on the outer peripheral surface side. It is characterized by uneven distribution.
[0011]
According to the second aspect of the present invention, the photocurable resin on the inner peripheral surface side receives light irradiation and starts curing, and the heat accompanying this curing is transmitted to the thermosetting resin on the outer peripheral side, and this transmission is performed. The latter resin begins to be cured by heat, and the curing is further accelerated by the heat of curing.
[0012]
The invention described in claim 3 is characterized in that the lining material is formed in a cylindrical shape, and has a photocurable resin layer on the inner peripheral surface side and a thermosetting resin layer on the outer peripheral surface side. Thus, according to the lining material composed of two layers of the photo-curable resin layer (inner layer) and the thermosetting resin layer (outer layer), the inner layer starts to be cured by irradiation light, and the outer layer is heated by the curing heat of the inner layer. Harden. In either case, most of the photocurable resin is present within the range covered by the irradiation light.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 shows a part of a lining material 1 in a perspective view, and this lining material is formed of a material obtained by mixing a substantially uncured photo-curing resin and a thermosetting resin. The resin in the mixed state is impregnated in a mat-like base material made of glass fiber, polyester fiber or the like, and the lining material is maintained in a cylindrical shape by this base material.
[0017]
FIG. 2 schematically shows an operation process for impregnating a mat-like base material with a resin when manufacturing such a cylindrical lining material. While the flat base material 4 having a predetermined width is transferred in the direction of arrow A, it is guided by the guide rolls 5a to 5h in the tank 5 and guided into the tank 5, and the thermosetting property filled therein. It is immersed in the resin N, and the thermosetting resin N is impregnated in the meantime. The base material 4 exiting the thermosetting resin tank 5 is then guided in the tank 6 by the guide rolls 6a to 6h, guided into the tank 6, and immersed in the photocurable resin H filled therein, It is impregnated with a photocurable resin. After the base material 4 exiting the photocurable resin tank 6 is coated with a peelable thin film on the front and back, it is rolled into a cylindrical shape, and both edge portions are bonded or stitched to join the cylindrical lining material 1 and Made.
[0018]
The lining material of FIG. 3 is also manufactured by impregnating the base material with resin. In this embodiment, the photocurable resin 2 is concentrated on the inner peripheral surface side, and the outer peripheral surface side is exclusively thermosetting. The resin 3 is unevenly distributed.
[0019]
Also in this embodiment, the inner and outer surfaces of the lining material are covered with a peelable thin film (not shown), which protects the surface of the lining material during storage and transportation, and between the contact portions. Bonding is prevented.
[0020]
FIG. 4 shows an embodiment of a lining material 1 having a layer 2 made of a photocurable resin on the inner peripheral side and a layer 3 made of a thermosetting resin on the outer peripheral side. In this case, the base material impregnated with the photocurable resin and the other base material impregnated with the thermosetting resin may be overlapped to form two layers, or the photocurable resin and the one base material may be combined with each other. Two layers may be impregnated with a thermosetting resin.
[0021]
In the present invention, the expressions of the inner peripheral surface side and the outer peripheral surface side represent the internal / external relationship in the lining material 1 that is inserted into an existing pipe line and ready to receive light irradiation. As shown in FIG. 9, when the lining material is inserted into the existing pipe line by the reversal method, the lining material before insertion is unevenly distributed with no photo-curing resin on the outer peripheral surface side and no thermosetting resin on the inner peripheral surface side. It exists.
[0022]
FIG. 5 shows a method for manufacturing the lining material 1 shown in FIG. The manufacturing method is as follows. First, a peelable thin film is wound around a core tube (these are not shown), and a base material 7 impregnated with a photocurable resin is spirally wound thereon, and further, Then, the base material 8 impregnated with the thermosetting resin is spirally wound, a peelable thin film is wound thereon, and then the core tube is removed. The finished lining material 1 has a photo-curing resin layer on the inner peripheral side and a thermosetting resin layer on the outer peripheral side, so that it is inserted into the existing pipe line by drawing in when the existing pipe line is rehabilitated. It is manufactured with the intention of being, but when it is to be inserted into an existing pipe by the reversal method, the base material 8 impregnated with the thermosetting resin is first wound on the thin film of the core cylinder. Then, the base material 7 impregnated with the photocurable resin is placed on it. In any case, in a state after the lining material 1 is inserted into the existing pipe line, the photocurable resin layer comes to the inner peripheral side and the thermosetting resin layer comes to the outer peripheral side.
[0023]
Next, a method for rehabilitating an existing pipe line, for example, a sewer pipe, using the lining material will be described below with reference to FIGS.
[0024]
As described above, the lining material 1 is inserted into an existing pipeline to be rehabilitated, closely contacted with the inner wall surface of the pipeline, and then cured. As a method of inserting the lining material 1 into the pipeline, the conventional drawing shown in FIG. The construction method or the reverse construction method shown in FIGS. 8 and 9 has been proposed.
[0025]
In FIG. 6, reference numerals 21 and 22 are manholes, and reference numeral 23 is buried in the ground made of a fume tube, a ceramic tube, etc., and is deteriorated and eroded by being exposed to hydrogen sulfide or other corrosive gas, etc. by long-term use. This is an existing pipe line that needs to be rehabilitated because the pipe thickness is reduced and the strength is reduced, or cracks and the like are generated due to ground pressure, vibration, and loading.
[0026]
Prior to the insertion of the lining material, first, high-pressure water is sprayed onto the inner peripheral surface 23a of the tube 23 to clean the inner peripheral surface 23a. If necessary, the deteriorated portion of the inner peripheral surface of the pipeline that has been cleaned is removed by an automatic cutting machine.
[0027]
Next, the lining material supply device 26 provided on the ground is crushed flat and wound around the drum 26a, or the flat crushed material is folded and connected to the tip 1a of the lining material 1 in a stacked state. The pulled tow rope 27 is introduced from one manhole 21 and is pulled by the tow device 28 provided on the ground through the inside of the pipe line 23 and the other manhole 22.
[0028]
By pulling the tow rope 27, the flat lining material housed in the lining material supply device 26 is drawn out and drawn into the duct 23 through the manhole 21, and the tip 1 a is guided into the manhole 22. In FIG. 6, reference numeral 25 denotes a resin sheet such as vinyl chloride laid at the lower part of the pipe to protect the lining from damage caused by friction with the pipe wall when the lining is drawn. The relationship between 25 and the lining material 1 is clearly shown in FIG. 6 (a) showing an enlarged scale view of the BB cross section in FIG.
[0029]
Next, at both ends of the lining material 1 inserted into the pipe line 23, portions protruding from the pipe line 23 into the respective manholes 21 and 22 are cut, and then the lining is formed by the plug body 24 as shown in FIG. The front end 1a and the other end 1b of the material 1 are closed, and compressed air is supplied into the lining material 1 from the other end 1b side to spread the lining material 1 and press against the inner peripheral surface 23a of the pipe line 23. . The compressed air is supplied into the lining material 1 from the ground through an air supply pipe 19 arranged in the manhole 21. Next, the lining material is cured as described below with reference to FIG.
[0030]
When the lining material 1 is inserted into the pipeline by the reversal method shown in FIGS. 8 and 9, first, as shown in FIG. 8, a lining material introduction side device 29 is attached to one manhole 22 by a support 30, and the other A guide pipe 31 as an outlet side device is attached to the manhole 21.
[0031]
Next, as shown in FIG. 9, the lining material 1 is sent out from the outlet of the introduction side device 29 by the compressed air supplied from the introduction side device 29, and is sequentially reversed (the inner peripheral surface and the outer peripheral surface are reversed). It is made to expand and is pressed against the inner wall surface 23 a of the pipe 23 from the one end side 23 c to the other end side 23 d of the pipe 23 to bring it to the upper end of the guide pipe 31. Next, the lining material is cured as described below with reference to FIG.
[0032]
Regardless of which method is used to insert the lining material 1 into the pipeline, when the lining material shown in FIGS. 3 and 4 is used, the photo-curing resin is concentrated on the inside in the state of being inserted into the pipeline. It is made to exist.
[0033]
When the lining material 1 is inserted into the pipe line 23 by the drawing method shown in FIGS. 6 and 7, the lining material is cured as follows. That is, as shown in FIG. 7, a light irradiation device 32 such as a UV lamp or a visible light source is disposed in the lining material 1 inside the lining material 1, and a cord 32 a extending from the light irradiation device 32 attaches the lining material 1. The plug body 24 is closed and connected to the control device 33 on the ground. Then, light is irradiated to the inner peripheral surface of the lining material 1 from the light irradiating device 32 that moves in the lining material 1 pressed against the inner peripheral surface 23a of the pipe line by the compressed air supplied through the air supply pipe 19. The photocurable resin is cured, and the thermosetting resin is cured by the heat of curing generated at that time. When curing is performed, the light irradiation device 32 is moved at a relatively low speed at the end position of the lining material 1 so that the light irradiation is sufficiently performed. That is, the moving speed of the irradiation device 32 is determined in consideration of the optimal irradiation time. Instead of adjusting the moving speed, the light quantity of a lamp or the like may be adjusted.
[0034]
As shown in the schematic diagrams of FIGS. 11 and 12, the curing of the resin begins with the photocurable resin 2 being irradiated with light, and the thermosetting resin 3 is cured by the heat of curing. The thermosetting resin is also cured by the curing heat. As a result, a thermosetting layer 3 ′ and a photocuring layer 2 ′ are formed on the inner peripheral surface of the existing pipe line 23.
[0035]
After the lining material 1 is cured, both ends are cut as shown in FIG. 7 by ee and ff to cut off the protruding portions in the manholes 21 and 22, and the light irradiation device 32 is removed. Remove.
[0036]
When the lining material 1 is inserted into the conduit 23 by the inversion method shown in FIGS. 8 and 9, the lining material is cured as follows. That is, as shown in FIG. 10, a traction device 34 is provided above the guide pipe 31, the rope 35 is pulled by the traction device, and the light irradiation device 36 connected to the rope is lowered through the introduction side device 29. It introduces to the one end side 23c of the water pipe 23, operates the light irradiation apparatus in a state where the light irradiation apparatus 36 is on the one end side 23c of the sewer pipe, moves to the other end side 23d, or the other end side of the sewer pipe 23 in advance. It is introduced to 23d, the irradiation device is operated in a state where the irradiation device 36 is on the other end side 23c of the sewer pipe, and the introduction side device 29 of the irradiation device 36 is provided by a traction device (not shown) provided in the introduction side device 29. The rope 37 connected to the side is wound up, light is irradiated while moving the irradiation device 36 from the other end side 23d of the sewer pipe to the one end side 23c, and the photocurable resin is cured. By Also to cure the thermosetting resin. Also in this case, as described with reference to FIG. 7, when curing is performed, the light irradiation device 36 is moved at a relatively low speed at the end position of the lining material 1, and light irradiation is sufficiently performed. It is made like. That is, the moving speed of the irradiation device 36 is determined in consideration of the optimal irradiation time. Instead of adjusting the moving speed, the light quantity of a lamp or the like may be adjusted.
[0037]
After the lining material 1 is cured, the lining material portions protruding into the manholes 21 and 22 at both ends thereof are cut off, and the introduction side device 29, the guide pipe 31, the light irradiation device 36, and other devices are removed to remove the pipe line. Rehabilitation is complete.
[0038]
【The invention's effect】
According to the present invention, the lining material adhered to the inner peripheral surface of the existing pipe line is first cured and advanced by light irradiation, and the thermosetting resin begins to be cured by the heat of curing. Since the curing is accelerated by the self-curing heat, curing of the lining material can be achieved in a relatively short time even when the lining material is thick, and a strong lining is already installed in a reduced work time. It can be provided in the pipeline.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a lining material according to the present invention.
FIG. 2 is a diagram for explaining a manufacturing method of a lining material.
FIG. 3 is a partial perspective view of a lining material according to another embodiment of the present invention.
FIG. 4 is a partial perspective view of a lining material according to still another embodiment of the present invention.
FIG. 5 is a diagram for explaining a manufacturing method of the lining material shown in FIG. 4;
FIG. 6 is a schematic cross-sectional view along a vertical plane passing through the axis of the pipe line and the manhole, showing a method of inserting the lining material according to the present invention into the pipe line by retraction.
7 is a schematic cross-sectional view similar to FIG. 6, illustrating a method for curing a lining material adhered to the inner peripheral surface of a pipe line. FIG.
8 is a schematic sectional view similar to FIG. 6, showing a method for inserting a lining material according to the present invention into a pipe line by a reversal method.
9 is a schematic cross-sectional view similar to FIG. 6, showing a lining material being inserted into a pipe line by a reversal method.
10 is a schematic cross-sectional view similar to FIG. 6 for explaining a method for curing a lining material that has been inserted and is in close contact with the inner peripheral surface of a pipeline. FIG.
FIG. 11 is a schematic diagram for explaining the curing process of the lining material.
12 is a cross-sectional view of the entire pipeline along the line AA in FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lining material 2 ... Photocurable resin 3 ... Thermosetting resin 4 ... Base material 5 ... Thermosetting resin tank 5a-5h ... Guide roll 6 ... Light Curing resin tanks 6a to 6h ... guide roll 7 ... photocurable resin impregnated base material 8 ... thermosetting resin impregnated base material 19 ... air supply pipe 21 ... manhole 22 ... manhole 23 ... Pipe lines (existing pipes such as sewer pipes)
23a ... Pipe inner peripheral surface 24 ... Plug body 26 ... Lining material supply device 27 ... Towing rope 28 ... Towing device 29 ... Lining material introduction side device 30 ... Support 31 ... guide pipe 32 ... light irradiation device 32a ... code 33 ... control device 34 ... traction device 35 ... rope 36 ... light irradiation device 37 ... rope

Claims (3)

Both of the photocurable resin and a thermosetting resin insert a including pipe rehabilitating lining material into existing conduit, comprising the steps of adhering an existing conduit wall,
A light irradiation step of irradiating light from the inside to the lining material for pipe rehabilitation, and curing the photocurable resin;
The pipe retreading method is characterized in that the entire lining material for pipe retreading is cured only by the light irradiation step . A lining material for pipeline retreading used in the method according to claim 1,
Is configured in a tubular shape, the inner photocurable resin on the peripheral surface side, pipe rehabilitating lining material characterized in that the thermosetting resin is unevenly distributed, respectively on the outer circumferential surface side. The pipe rehabilitation according to claim 2 , wherein the pipe rehabilitation is configured in a cylindrical shape and has two layers of a photocurable resin layer on the inner peripheral surface side and a thermosetting resin layer on the outer peripheral surface side. Lining material.

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