JPH0751315B2 - Lining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention has a felt layer made of acrylic fiber impregnated with an ultraviolet-curable unsaturated polyester resin on the inner surface of sewer, water supply, oil pipe, and other existing pipes. The present invention relates to a lining method for lining a lining material to form a synthetic resin pipe.

[Prior art] In recent years, for the purpose of reinforcing the strength of existing pipes such as sewers and waterworks, anticorrosion measures, water leakage and water infiltration measures, and improving the flow rate, synthetic resin is lined on the inner surface of the existing pipe or synthetic resin is applied on the inner surface of the existing pipe. The reverse lining method of forming a tube is in the spotlight.

For example, in the method disclosed in Japanese Examined Patent Publication (Kokoku) No. 55-43890 and Japanese Laid-Open Patent Publication No. 64-85738, a needle felt layer is lined with an inner lining material impregnated with a liquid thermosetting resin such as epoxy or polyester under fluid pressure in an existing pipe. To reverse and advance, and press the reversed lining material to the inside surface of the existing pipe by fluid pressure,
It is a method of curing a thermosetting resin to form a synthetic resin pipe on the inner surface of an existing pipe.

A conventional thermosetting resin-impregnated lining material represented by JP-B-55-43890 is inverted and then heat-cured to form a synthetic resin pipe. However, the total heating time and cooling time during heat-curing are set. Takes about 15 hours when a polyester resin is used as a thermosetting resin for a lining material having a diameter of 300 mm and a thickness of 6 mm, for example. Further, even if the quick-drying type of the epoxy resin is used, it takes about 6 to 8 hours, and the working time is long. This is also due to the fact that heat is stored in the existing pipe and surrounding soil during the long heating and holding period, and the cooling rate becomes slow.

In order to eliminate such drawbacks, a lining material consisting of a felt layer impregnated with a resin that is cured by irradiating ultraviolet rays to a fibrous material is used, and a synthetic resin is applied to the inner surface of the existing pipe in a short working time. A method of lining the above is disclosed in, for example, JP-A-60-242038, JP-A-61-117343 or JP-A-62-132631.

[Problems to be Solved by the Invention] In the conventional lining method disclosed in Japanese Patent Laid-Open No. 60-242038, an inner lining material which is cured by irradiation with ultraviolet rays is sequentially reversed while being directly reversed by a pressure medium. Since the material is pressed against the inner surface of the existing pipe, it takes time to invert and insert the lining material into the existing pipe. For this reason, a special light-shielding device is required in order to prevent the curing of the lining material, which is hardened rapidly even by the sun's rays, at the time of reversing / inserting, and the lining device and the process are complicated. there were.

In addition, JP-A-61-117343 or JP-A-62-132631.
As disclosed in the official gazette, the lining material is pressed directly against the inner surface of the existing pipe with a swirling roller, or air is supplied to the entire inside of the collapsed lining material to expand and expand the lining material at once and When pressed against the surface, there is a disadvantage that wrinkles are easily generated in the circumferential direction and the major axis direction of the lining material.

Furthermore, if the lining material is expanded / expanded at one time and pressed against the inner surface of the existing pipe, the accumulated water and air in the existing pipe will not be sufficiently discharged, and a gap will be created between the existing pipe and the lining layer, and It also had the disadvantage of causing water leakage.

The present invention has been made to solve such disadvantages, and an object of the present invention is to propose a lining method capable of reliably pressing an inner lining material against an inner surface of an existing pipe by a simple device and process to cure the lining material. Is.

[Means for Solving the Problems] The lining method according to the present invention is a lining method for a lining material having a felt layer made of an acrylic resin impregnated with an ultraviolet-curable unsaturated polyester resin, and is provided on both ends of an existing pipe. To fill the lower part of the existing pipe with water,
The insertion step of inserting and penetrating the above-mentioned lining material connected to the rope on the water surface into the existing pipe, fixing the tip of the penetrating lining material to the pipe joint with valve and sealing it, and the rear end of the lining material is It is fixed to the pressure fluid supply port together with the reversing part at the end of the reversing hose that has the same length as the lining material and good UV transparency, and the pressure fluid is supplied from the valve at the tip of the lining material to make the lining material almost in the diameter direction of the existing pipe. After pre-expansion to an outer diameter of about half, while maintaining the inside of the lining material at a constant pressure with the pressure fluid, supply a pressure fluid with a higher pressure than this pressure fluid from the pressure fluid supply port and reverse it. Inflation process of reversing and advancing the hose into the lining material, pressing the lining material from the rear end to the inner surface of the existing pipe in sequence, and generating ultraviolet rays connected to the rear end of the inverting hose to the lining material pressed to the inner surface of the existing pipe UV rays from the lamp By morphism, characterized by comprising a curing step of sequentially cure the lining material.

[Operation] In the present invention, the buoyancy of water is utilized by filling the lower part of the existing pipe with water and inserting the lining material whose tip end is connected to the rope on the water surface into the existing pipe to penetrate it. Insert the lining material into the existing pipe smoothly and quickly.

In addition, the lining material inserted into the existing pipe is pre-expanded about half in the diameter direction of the existing pipe to adjust the shape of the lining material, and then expanded again from the rear end of the lining material by the reversing hose. By performing the expansion, the lining material is pressed against the inner surface of the existing pipe while discharging water and air accumulated between the inner surface of the existing pipe and the lining material.

By irradiating the pressed lining material with ultraviolet rays, the lining material can be rapidly cured. When the liner is irradiated with this ultraviolet ray to cure the liner, the reversing hose has good ultraviolet ray transparency, so that the liner can be irradiated without the ultraviolet ray being absorbed by the reversing hose.

[Embodiment] FIG. 1, FIG. 2, and FIG. 3 are process drawings showing a construction process of an embodiment of the present invention. FIG. 1 shows an existing pipe 1 and a lining material 2
2 is a process of inserting the lining material, FIG.
The figure shows the curing process of the lining material 2.

In describing the steps of FIGS. 1 to 3, first, the lining material 2 used in this embodiment will be described with reference to the perspective view of FIG.

In FIG. 4, 3 is an outer layer film tube of the lining material 2, the outer layer film tube 3 has excellent solvent resistance,
It is made of white synthetic resin film such as nylon and vinylon. Reference numeral 4 denotes a felt layer laminated on the inner surface of the outer film tube 3, and the felt layer 4 is a layer for determining the thickness of the synthetic resin tube after molding, and as shown in the sectional view of FIG. For example, thickness t = 6m
The felt 4a is formed by punching so as to be 500 g to 1800 g / m ² at m, and the glass fiber 4b having a length of, for example, 30 mm or more on both sides or one side of the inner and outer sides of the felt 4a.
20% by weight or more are dispersed and integrated by punching, and the felt 4a is impregnated with a UV-curable unsaturated polyester resin containing a photoinitiator that absorbs a long-wavelength spectrum of 350 to 450 nm where the penetration depth of near-UV rays is large. There is. The ultraviolet curable unsaturated polyester resin impregnated in the felt 4a is made of, for example, a neopentyl glycol acrylate resin or an epoxy acrylate resin, and the photoinitiator is, for example, an acylphosphine oxide and a solvent, or an acylphosphine oxide and a light in the thickness direction. It contains a peroxide catalyst and a solvent that assist heat-curing with the generated heat.
It is preferable to have a viscosity of 1 to 40 poise at 20 ° C.

5 is, for example, 200 laminated on the inner surface of the felt layer 4.
An inner layer film tube having a thickness of μm or more,
The inner layer film tube 5 is a film tube 6 formed of a synthetic resin having good light permeability and low water vapor permeability, and a film tube 6 having good light permeability and low gas permeability such as carbon dioxide gas and high heat deformation temperature under load, for example, nylon film. And the film tube 7 formed of the same. The film tube 6 of the inner layer film tube 5 is combined with the inner film tube 7 by a co-extrusion method, and acts as an adhesive layer which is easily laminated with the felt layer 4, and has good transparency, elongation and adhesiveness. Ionomer resins and the like are used. Lining material 2 formed in this way
Since the felt layer 4 is hardened by light irradiation, it is stored and stored in a sealed container made of an opaque material in a circularly wound or folded state, but the outer film tube 3 of the lining material 2 is white. Since it is formed of a basic synthetic resin, it is possible to reflect light and reduce the influence of environmental rays such as sun rays.

Next, an operation of forming a synthetic resin pipe in the existing pipe 1 by the lining material 2 configured as described above will be described.

As shown in FIG. 1, weirs 8 are provided under both ends of the existing pipe 1, and the weir 8 fills the lower part of the existing pipe 1 with water 9. In this state, the rope 10 is passed through the existing pipe 1, and the tip of the lining material 2 with the outer film tube 3 on the outside is connected to the rear end of the rope 10. The rope 10 is pulled to insert the lining material 2 into the existing pipe 1. When the lining material 2 is inserted, the lining material 2 floats on the water surface due to the buoyancy of the water 9 filling the lower part of the existing pipe 1 as shown in the sectional view of FIG. 6 or FIG. Since the contact area between the material 2 and the existing pipe 1 is reduced and the friction resistance when the lining material 2 is inserted can be reduced, the lining material 2 can be smoothly and quickly inserted into the existing pipe 1 and penetrated. Can be made.

In this way, after the lining material 2 is penetrated into the existing pipe 1, the tip of the lining material 2 is squeezed as shown in FIG. 2, and this tip is provided with a fluid supply valve 11 and a safety valve 12. Securely fix the outer circumference of 13 so that there is no fluid leakage. on the other hand,
The rear end of the lining material 2 passes through the pressure fluid supply port 14 and is fixed to the pressure fluid supply port 14 together with the tip of the reversing hose 15 whose tip is inverted. The reversing hose 15 provided inside the lining material 2 has a length substantially the same as that of the lining material 2 and is made of a synthetic resin film having a good ultraviolet ray transmitting property and a tensile strength, such as a glass fiber reinforced nylon film or a polycarbonate film. .

After fixing both ends of the lining material 2 as described above, the fluid supply valve 11 provided at the tip of the lining material 2 is opened, and a pressure fluid, for example, pressurized water is supplied to the inside 16 of the lining material 2 to make the lining material 2 Is expanded so that the outer diameter of the existing pipe 1 is approximately half or more with respect to the diameter direction. Then, the fluid supply valve 11 is closed to keep the inside 16 of the lining material 2 in a hermetically sealed state. In this way, the lining material 2 is expanded by about half and the lining material 2
The pressure fluid supply port 14 at the rear end of the fluid supply valve 11
A pressure fluid having a higher pressure than the pressure fluid supplied in step 2 is supplied to invert and advance the reversal hose 15 into the lining material 2. By reversing and advancing the reversing hose 15, the lining material 2 is sequentially pressed from the rear end portion to the inner surface of the existing pipe 1, and at the same time, water and air staying between the existing pipe 1 and the lining material 2 are moved in the traveling direction. Push out. Although the fluid pressure in the inside 16 of the lining material 2 rises due to the reversal / progress of the reversing hose 15, the safety valve 12 opens due to this pressure increase and the increased pressure is released. The constant pressure determined by can be maintained.

When the reversal hose 15 is reversed and progresses, and the reversal tip portion 17 of the reversal hose 15 is inserted to about half of the lining material 2, the rear end portion 18 of the reversal hose 15 enters the rear end portion of the lining material 2. As shown in FIG. 3, one or a plurality of ultraviolet ray generators 19 are connected in series to the rear end portion 18 of the reversing hose 15 by a cable 20 reinforced in tensile strength.

As shown in the perspective view of FIG.
A plurality of elastic sleds 21 are attached to the outer circumference to reinforce the rod 22.
Two to four ultraviolet ray generating lamps 24 made of, for example, metal halide lamps are mounted between the fixing plates 23 connected by. Then, the sled 21 slides on the inner surface of the lining material 2 pressed against the inner surface of the existing pipe 1, so that the ultraviolet ray generating lamp 24 becomes symmetrical with respect to the central axis of the lining material 2.

When the reversing hose 15 is further reversed / progressed, the ultraviolet ray generator 19 is connected to the rear end portion 18 of the reversing hose 15 and is connected to the cable 20.
Is inserted into the inside of the liner 2 pressed against the inner surface of the existing pipe 1, and the liner 2 is irradiated with ultraviolet rays from the rear end of the liner 2 through the reversing hose 15. During this UV irradiation, the reversing hose 15 is formed of a glass-maintaining reinforced nylon film or the like having good UV transparency, and the inner layer film tube 5 of the lining material 2 also has good light transparency. Enter the felt layer 4 of the material 2. In addition, since the outer layer film tube 3 of the lining material 2 has a white color tone, the UV reversal efficiency is good and the hardening of the felt layer 4 of the lining material 2 is promoted to cure the lining material 2 in a short time of about 3 minutes. .

After that, the reversing hose 15 is reversed and advanced at an appropriate speed according to the type and thickness of the ultraviolet-curing resin of the lining material 2, and the lining material 2 is cured by irradiating ultraviolet rays to the tip of the lining material 2. After that, the pipe joint 13 and the pressure fluid supply port 14 at both ends of the lining material 2 are removed, both ends of the lining material 2 are cut, and then the reversing hose 15 and the ultraviolet ray generator 19 are collected, whereby the existing pipe 1 It is possible to form a synthetic resin tube that is in close contact with the inner surface of the.

It should be noted that in the above-described embodiment, the ultraviolet ray generator 19 has 2 to 4
The case where the ultraviolet ray generating lamp 24 is provided has been described, but if the existing tube 1 has a small diameter of 300 mm or less, one ultraviolet ray generating lamp 24 may be provided at the center of the fixing plate 23.

[Effects of the Invention] As described above, according to the present invention, the lower portion of the existing pipe is filled with water, and the lining material whose tip is connected to the rope is inserted into the existing pipe and penetrated through the water surface. By using the buoyancy of water, the lining material can be smoothly and quickly inserted into the existing pipe.

In addition, the lining material inserted into the existing pipe is expanded about half in the diameter direction of the existing pipe to adjust the shape of the lining material and then expanded again from the rear end of the lining material by the reversing hose. By doing so, the lining material is pressed against the inner surface of the existing pipe while discharging the water and air accumulated between the inner surface of the existing pipe and the lining material, so there is no gap between the inner surface of the existing pipe and the synthetic resin. A tube can be formed.

Further, since the lining material is pressed against the inner surface of the existing pipe by a two-stage expansion process in which the lining material is pre-expanded to adjust the shape of the lining material and then expanded again, the lining material can be reasonably expanded.

Further, since the lining material is sequentially expanded from the rear end portion of the lining material by the reversing hose and the lining material is pressed against the inner surface of the existing pipe, it is possible to prevent the pressed lining material from wrinkling.

Furthermore, when the lining material pressed against the existing pipe is irradiated with ultraviolet rays to be cured, the lining material is irradiated without being absorbed by the reversing hose, which has good UV transparency, so that the lining material can be quickly processed. It can be hardened and the construction time can be greatly reduced.

[Brief description of drawings]

1, 2, and 3 are process drawings showing the construction steps of the embodiment of the present invention, FIG. 4 is a perspective view showing the lining material used in the above embodiment, and FIG. 5 is the above lining material. 6 is a cross-sectional view showing the felt layer, FIG. 6 and FIG. 7 are cross-sectional views showing the lining material when inserted into the existing pipe, and FIG. 8 is a perspective view showing the ultraviolet ray generator used in the above-mentioned embodiment. 1 …… Existing pipe, 2 …… Inner lining material, 3 …… Outer layer film tube, 4 …… Felt layer, 5 …… Inner layer film tube, 8 …… Weir, 9 …… Water, 10 …… Rope, 11 …… Fluid supply valve, 14 …… Pressure fluid supply port, 15 …… Inverting hose, 19
…… UV generator, 20 …… cable, 24 …… UV generator lamp.

Claims (1)

[Claims] 1. A method of lining a lining material having a felt layer made of an acrylic resin impregnated with an ultraviolet-curable unsaturated polyester resin, wherein a cough is provided at both ends of the existing pipe to fill the lower part of the existing pipe with water.
On the water surface, insert the above lining material connected to the rope into the existing pipe and penetrate it, fix the tip of the piercing lining material to the pipe joint with fluid supply valve and seal it, and the rear end of the lining material is lining. It has the same length as the material and has good UV transparency. It is fixed to the pressure fluid supply port together with the reversing part at the tip of the reversing hose, and the pressure fluid is supplied from the fluid supply valve at the tip of the lining material to make After pre-expanding so that the outer diameter is about half, the pressure fluid with a higher pressure than this pressure fluid is supplied from the pressure fluid supply port while maintaining the inside of the lining material at a constant pressure with the pressure fluid. The reversing hose is reversed and moved into the lining material, and the lining material is sequentially pressed from the rear end to the inner surface of the existing pipe, and the ultraviolet rays generated from the rear end of the reversing hose are connected to the lining material pressed against the inner surface of the existing pipe. Irradiate ultraviolet rays from the lamp Lining method according to claim Rukoto.