JPH0866964A - Partial lining method - Google Patents

Abstract

PURPOSE: To form a synthetic resin pipe on only damaged parts or degraded necessary and most limited parts in an existing pipe. CONSTITUTION: A housing pipe and inner tube 5 constitutes a pressure space, and a compression space Is formed by an expansion tube 6 fixed on the outer periphery of a support pipe 3. A liner material 14 having a drawing-in belt body held therein is inserted into the inner tube 5, and then the tip end of the liner material 14 is folded back so as to be tacked on the intermediate outer peripheral surface of the expansion tube 6. While applying a constant pre-pressure in the pressure space and pressurizing the outer surface of the liner material 14 of the inner tube 5, the drawing-in belt body 15 Is pulled In order to allow the liner material 14 to be moved to a predetermined position in the existing pipe 16. A pressurized fluid is supplied in the pressure space, and the end part of the liner material 14 is pressed and secured against the existing pipe 16 inner surface. Then, a pressurized fluid is supplied in the pressure space, and the liner material 14 is inverted and pressed against the existing pipe 16 inner surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial lining construction method for forming a synthetic resin pipe in a damaged or deteriorated portion of sewerage, water supply, oil supply pipe or any other existing pipe.

[0002]

2. Description of the Related Art In recent years, a lining method of forming a synthetic resin pipe on the inner surface of an existing pipe has been spotlighted for the purpose of reinforcing the strength of existing pipes such as sewers and waterworks, anticorrosion measures, water leakage / water infiltration measures, and improving flow rate. There is.

A conventional lining method is disclosed in, for example, Japanese Patent Laid-Open No.
-56531 and Japanese Unexamined Patent Publication No. 2-43024, a method of pulling and inserting the lining material made of a thermoplastic resin pipe over the entire length of the existing pipe while heating and softening it above the softening point. As disclosed in Japanese Unexamined Patent Publication (Kokai) No.-12911 or the like, the tip of the guide tube which is connected to the pressure vessel and forms the pressure space is arranged near the end of the existing tube such as the manhole, There is a reverse lining method that folds and fixes the end of the lining material and advances the reversal surface of the lining material into the existing pipe by the fluid pressure of the pressure space, inserts the lining material into the existing pipe and presses the entire inner surface of the existing pipe. Has been adopted.

[0004]

In the above-mentioned inversion lining method, the lining material can be inserted into the existing pipe and pressed against the inner surface of the existing pipe at the same time, and the synthetic resin pipe can be easily formed in the entire existing pipe. When forming a synthetic resin pipe only in the damaged or deteriorated minimum necessary part, if you try to reversely insert the lining material only in that part, the folded end of the lining material will be inserted in the middle part of the existing pipe. In order to fix the part, it is necessary to arrange a guide pipe connected to the pressure vessel up to the middle part of the existing pipe to form a pressure space. However, it is not easy to arrange the guide pipe up to the middle part of the existing pipe, and it is difficult to form the synthetic resin pipe only in a necessary portion inside the existing pipe by the reverse lining method.

For this reason, the lining material is inverted and inserted from the end of the pipe to the necessary portion in the existing pipe to form a synthetic resin pipe, and then the unnecessary portion is cut and removed. When the unnecessary portion is cut and discarded as described above, the amount of the lining material discarded increases, and the material is wasted.

The present invention has been made in order to improve such disadvantages, and a partial lining that can easily form a synthetic resin pipe only in a damaged portion or a deteriorated necessary minimum portion in an existing pipe. The purpose is to provide a construction method.

[0007]

In the partial lining method according to the present invention, a cylindrical support pipe is attached to the front end, and a pressurized fluid forward passage hose is connected to the rear end to provide a pressurized fluid return passage hose. The inner tube is made of a resin film having tensile strength inside the storage tube to which the attached sealing plate is attached, and the front end is opened and the rear end is sealed to accommodate the inner tube connected to the pressurized fluid outward path hose. Then, the front end opening of the inner tube is folded back and fixed to the outer peripheral surface of the front end of the support tube to form a pressure space between the storage tube and the inner tube, and the non-adhesive rubber or elastomer resin is used. Then, a ring-shaped hollow expander was fixed to the outer peripheral surface of the support tube, and a curable resin was impregnated into the inner tube of the lining jig that formed a pressurizing space connected to the pressurizing fluid hose. Made of flexible resin tube, for retracting inside Insert the lining material with the body sandwiched, fold back the tip of the lining material and temporarily fix it to the outer peripheral surface of the intermediate part of the hollow expander, and from the pressurized fluid outward hose to the inner tube and storage tube. While applying a constant pre-compression to the pressurizing space between the two, the retracting strip is pulled and inserted into a predetermined position in the existing pipe, and then the pressurizing fluid supply hose forms a hollow expander. The pressurized fluid is supplied to the space, the hollow expander is expanded to press the end of the lining material against the inner surface of the existing pipe to fix it, and the pressurized fluid is supplied from the forward passage of the pressurized fluid to the inner tube. -It is characterized in that the tube is inverted and inserted into the existing pipe, and the lining material is inverted and pressed against the inner surface of the existing pipe to cure.

Further, it is preferable to fold back the expansion tube made of non-adhesive rubber or elastomer resin and fix both ends to the front end and the rear end of the outer peripheral surface of the support tube to form a pressurizing space.

[0009]

According to the present invention, a cylindrical support tube is attached to the front end, and a pressure space is formed by an inner tube and a storage tube having a rear end attached with a sealing plate, and is fixed to the outer peripheral surface of the support tube. The hollow expander forms a pressure space. Inner tube of lining jig having this pressure space and pressure space
Insert the lining material with the pulling belt sandwiched in the sleeve, fold back the tip of the lining material, and temporarily fix to the outer peripheral surface of the intermediate portion of the hollow expander. When inserting the lining material to a predetermined position in the existing pipe, a preload of a constant pressure is applied to the pressure space, the inner tube presses the outer surface of the lining material, and the pull-in belt is sandwiched by the lining material. The body is fixed to the lining material, and the pulling band is pulled to move the lining material fixed to the lining jig to a predetermined position in the existing pipe.

After the lining material fixed to the lining jig has moved to a predetermined position, a pressurized fluid is supplied to the pressurizing space formed by the hollow expander to expand the hollow expander so that the end portion of the lining material is expanded. Is pressed against the inner surface of the existing pipe and fixed. Then, a pressurized fluid is supplied to the pressure space formed by the storage pipe and the inner tube, and the inner tube is inverted and inserted into the existing pipe to invert the lining material and press the inner surface of the existing pipe.

By folding back the expansion tube made of the non-adhesive rubber or the elastomer resin and fixing both ends to the front end and the rear end of the outer peripheral surface of the support tube to form a hollow expander, The pressure space can be easily formed.

[0012]

1 is a sectional view showing a lining jig according to an embodiment of the present invention. As shown in the figure, the lining jig 1 has a storage tube 2, a support tube 3, a sealing plate 4, an inner tube 5 and an expansion tube 6. The storage pipe 2 is made of a flexible resin pipe having heat resistance, a support pipe 3 made of a metal cylindrical pipe with a different diameter is attached to the front end, and a pressurized fluid outward passage hose 7 is connected to the rear end of the storage pipe 2. A sealing plate 4 to which a pressurized fluid return hose 8 is attached is attached. Inner Tu
The sleeve 5 is made of a resin film having heat resistance and tensile strength,
The front end is opened, and the rear end is sealed and connected to the pressurized fluid outward passage hose 7 by the rope 9 and accommodated in the accommodating pipe 2. The tip opening of the inner tube 5 is folded back and fixed to the outer peripheral surface of the tip of the support tube 3. The storage space 2 and the inner tube 5 form a pressure space 10. The expansion tube 6 is made of a heat-resistant, non-adhesive rubber or an elastomer resin such as a silicon-based or fluororubber-based resin, and one end of the inner tube 5 is attached to the outer peripheral surface of the support tube 3. The band 11 is fixed together with the opening. The other end of the expansion tube 6 is folded back so that the inner surface is on the outer side, and the folded end holds the pressurized fluid hose 12 and is fixed to the rear end of the outer peripheral surface of the support tube 3. There is. The folded portion of the expansion tube 6 and the support tube 3 form a pressure space 13.

The lining material 14 lining the inside of the existing pipe is a hollow long tube body coated or impregnated with a curable resin such as woven cloth or nonwoven cloth. The length of the inside pipe is damaged or deteriorated. It is determined according to the length of the part that is The lining material 14 may be a combination of reinforcing fibers such as glass and carbon in either the inner layer and the outer layer or the inner layer and the outer layer in order to strengthen the strength, and further, the outermost layer and the innermost layer or either one. Alternatively, the impermeable layer may be formed by laminating an impermeable film or coating an elastomer resin or the like.
The curable resin to be applied or impregnated is a room temperature curable resin,
Either a heat-curing resin or a photo-curing resin may be used.

As shown in FIG. 1, the tip of the retracting belt 15 that is retracted from the end of the existing pipe opposite to the end into which the lining 14 is inserted is inserted into the inside of the lining 14. The lining material 14 with the pulling band 15 sandwiched therein is inserted into the inner tube 5, and the tip portion of the lining material 14 has a predetermined length, that is, a length corresponding to the pipe diameter of the existing pipe, for example, 20
The expansion tube 6 is projected from the curved tip end of the expansion tube 6 to about 80 cm, and the other part is accommodated in the inner tube 5. Here, if the retractable strip 15 is sandwiched before the lining material 14 is impregnated with the curable resin and then the curable resin is impregnated, the retractable strip 15 can be easily sandwiched.

After that, the tip portion of the lining material 14 which is exposed to the outside is folded back so that the inner surface is on the outside, and the folded end portion is compared to the outer peripheral surface of the intermediate portion where the expansion tube 6 is folded back so that the cotton thread or the strength is comparable. Temporarily attach with a weak string. In this state, a constant pressure from the pressurized fluid outward hose 7 to the pressure space 10 between the inner tube 5 and the housing pipe 2, for example, 0.05 to 0.
Apply a preload of 3 kgf / cm ² . The inner tube 5 presses the outer surface of the lining material 14 by the preload applied to the pressure space 10, and the retraction strip 1 is sandwiched by the lining material 14.
5 is fixed to the lining material 14, and the draw-in belt 15 is integrated with the lining jig 1. In this state, as shown in the cross-sectional view of FIG. 2, the pull-in belt 15 is pulled to insert the lining jig 1 integrated with the lining material 14 into the existing pipe 16. When the lining jig 1 is inserted into the existing pipe 16, the long storage pipe 2 is made of a flexible resin pipe, so that the curved existing pipe 15 can be easily moved.

When the lining jig 1 reaches a predetermined position on the existing pipe 16, the lining jig 1 is stopped, and the pressurized fluid supply hose 12 is moved to the pressurized space 13 formed by folding back the expansion tube 6. Pressurized fluid is supplied, the expansion tube 6 is inflated by the pressure of the pressurized fluid, and the end portion of the lining material 14 is pressed against the inner surface of the existing pipe 16 to be fixed. After that, the pressurized fluid is supplied to the pressure space 10 between the inner tube 5 and the housing pipe 2 through the pressurized fluid outward path hose 7 with the pressurized fluid return path hose 8 closed. With this pressurized fluid,
As shown in FIG. 5, the inner tube 5 is inverted and inserted into the existing pipe 16, and the lining material 15 is inverted and pressed against the inner surface of the existing pipe 16. The amount of movement of the pressurized fluid outward passage hose 7 was confirmed when the lining material was reversed and inserted, and as shown in the sectional view of FIG. 3, when the entire lining material 15 was pressed against the inner surface of the existing pipe 16, The heated pressurized fluid is circulated through the pressurized fluid outward passage hose 7 and the pressurized fluid return passage hose 8 in the pressure space 10, and the inside of the pressure space 10 is maintained at a temperature of, for example, 60 to 80 ° C. for a predetermined time and lined. The curable resin impregnated in the material 15 is cured.

After the hardening resin impregnated in the lining material 15 is hardened, the pressure and temperature of the heating and pressurizing fluid circulating in the pressure space 10 are lowered, and the pressurizing fluid outward path hose 7 is lined with a jig. 1, the inner tube 5 is peeled from the hardened lining material 14 and collected in the storage tube 2.
After that, the pressure of the pressurized fluid supplied from the pressurized fluid supply hose 12 to the pressurized space 13 formed by the folding of the expansion tube 6 is reduced, and the inflation tube is expanded from the end of the hardened lining material 14. The bush 6 is separated, each hose 7, 8 and 9 is retracted and returned to the pipe mouth, and a synthetic resin pipe is formed at a predetermined portion of the existing pipe 16.

In the above-mentioned embodiment, the case where the curable resin impregnated in the lining material 14 which is inverted and inserted is cured by the temperature of the heating and pressurizing fluid is explained. It may be cured at room temperature or may be cured with light from an ultraviolet lamp or heat from a heater.

[0019]

As described above, according to the present invention, a cylindrical support tube is attached to the tip and a sealing plate is attached to the rear end of the storage tube and the inner tube to form a pressure space. Insert the lining material with the retracting band sandwiched in the inner tube of the tool, apply a constant preload to the pressure space, and press the outer surface of the lining material with the inner tube to lining the material. Since the pull-in belt that has been sandwiched with is fixed to the lining material, the lining jig and the lining material and the pull-in belt can be easily integrated, and the lining material and the lining jig can be easily installed in the existing pipe. Can be inserted.

Further, after the lining material fixed to the lining jig moves to a predetermined position, a pressurized fluid is supplied to the pressure space formed by the hollow expander to expand the hollow expander to expand the lining material. Since the end is pressed and fixed to the inner surface of the existing pipe, the end of the lining material can be fixed at any position on the existing pipe, and the lining is only applied to the damaged or deteriorated part of the existing pipe. The material can be inverted and inserted, and the synthetic resin pipe can be formed only in the minimum necessary portion of the existing pipe.

Further, since the synthetic resin pipe is directly formed only on the minimum necessary portion of the existing pipe, no extra work time is required for removing the lining material in unnecessary portions and the material for the lining material can be saved. .

By expanding the expansion tube made of non-adhesive rubber or elastomer resin and fixing both ends to the front and rear ends of the outer peripheral surface of the support tube, a hollow expander is formed. The pressure space can be easily formed.

[Brief description of drawings]

FIG. 1 is a sectional view showing a lining jig and a lining material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a step of reversing and inserting the lining material in the above embodiment.

FIG. 3 is a cross-sectional view showing a step of curing the lining material in the above embodiment.

[Explanation of symbols]

 1 Lining jig 2 Storage pipe 3 Support pipe 4 Sealing plate 5 Inner tube 6 Expansion tube 7 Pressurized fluid outward path hose 8 Pressurized fluid return path hose 10 Pressure space 12 Pressurized fluid hose 13 Pressurized space 14 Lining material 15 Strip for drawing 16 Existing pipe

Claims (2)

[Claims] 1. A storage pipe having a cylindrical support tube attached to a front end thereof and a sealing plate having a forward passage of a pressurized fluid communicating with a pressurized fluid return passage and a sealing plate attached to a rear end thereof. The inner tube is made of a resin film having tensile strength, the front end is open and the rear end is sealed, and the inner tube connected to the pressurized fluid outward hose is accommodated and the front end opening of the inner tube is folded back. Fixed to the outer peripheral surface of the tip of the support tube to form a pressure space with the storage tube and inner tube, and a ring-shaped hollow expansive body made of non-adhesive rubber or elastomer resin to form a support tube outer peripheral surface. The inner tube of the lining jig, which is fixed to the inside and forms the pressurizing space connected to the pressurizing fluid hose, is made of a flexible resin tube impregnated with a curable resin, and is used for retracting inside. Insert the lining material with the band sandwiched between it and remove the tip of the lining material. It is folded back and temporarily fixed to the outer peripheral surface of the intermediate part of the hollow expander, and while applying a constant preload to the pressurized space between the inner fluid tube and the storage tube from the pressurized fluid outward hose, the retracting band After pulling the body and inserting it at a predetermined position in the existing pipe, the pressurized fluid is supplied from the pressurized fluid supply hose to the pressurized space formed by the hollow expander, and the hollow expander is expanded to provide the lining material. Press the end part of the inner pipe to the inner surface of the existing pipe to fix it, supply pressurized fluid from the pressurized fluid outward hose, and insert the inner tube inside the existing pipe by reversing and inserting the inner lining material to invert the inner pipe. A partial lining method characterized by being pressed to cure. 2. A pressurizing space is formed by folding back an expansion tube made of non-adhesive rubber or elastomeric resin and fixing both ends to the front end and the rear end of the outer peripheral surface of the support tube. Partial lining method described in 1.