KR101424649B1 - A pipe repair tube with reinforced crack- resistant property - Google Patents

Abstract

The present invention relates to a pipe maintenance tube reinforced with crack resistance, which is lined inside of various conduits (water pipes, sewer pipes, gas pipes, oil pipelines, etc.) to repair the pipes, So that cracks are not generated.
The tube maintenance tube with reinforced crack resistance according to the present invention comprises: a tubular reinforcing tube (20) comprising a felt (21) and a waterproof reinforcing film layer (22) coated on one side of the felt; A lining tube (30) formed on the outside of the reinforcing tube; And a thermosetting resin (40) impregnated into the reinforcing tube and the hybrid fabric, wherein the waterproof reinforcing film layer of the reinforcing tube is made of a material selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin and a urethane resin, A polypropylene layer and a polyethylene layer are stacked one on top of the other, and the polyethylene layer is bonded to one surface of the felt with an adhesive layer. In addition, the present invention relates to a method of manufacturing a felt, comprising: a tubular reinforcing tube (20) comprising a felt and a waterproof film layer coated on one side of the felt; A lining tube (30) formed on the outside of the reinforcing tube; And a thermosetting resin (40) impregnated into the reinforcing tube and the hybrid fabric, wherein the waterproof reinforcing film layer of the reinforcing tube is made of a material selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin and a urethane resin, And a hot-melt layer having a melting point lower than that of the thermoplastic resin layer as an adhesive layer and adhered to the felt. The hot-melt adhesive layer is a layered structure in which a hot-melt layer and a thermoplastic resin layer selected from the group consisting of polyurethane, polyester,

Description

[0001] The present invention relates to a pipe repair tube with reinforced crack-

More particularly, the present invention relates to a pipe for maintenance and repair, more particularly, to repair pipes by lining them in various pipes (water pipes, sewer pipes, gas pipes, oil pipelines, etc.) The present invention relates to a tube maintenance tube reinforced with crack resistance so as not to generate cracks.

Generally, a conduit is a pipe for moving rainwater or domestic sewage, and is a structure buried underground.

Such conduits are buried for a long time and become cracked when they are aged. As a result, cracks are generated in the joints connecting the pipes, and since the dirt is deposited due to the settlement, Since the replacement of the conduit is costly and time consuming, the method of repairing the conduit by replacing the conduit by excavation has been mainly developed and used.

In the conventional SET method, there is a pipe repair method using a SET method. In this SET method, after placing a tube impregnated with a thermosetting resin in a pipe to be repaired, blowing hot hot air into the tube, And the tube is hardened at the same time. At this time, the maintenance tube is installed in the inside of the pipe, and there is a pulling type and a reversing type. The pulling type is to pull from one side of the conduit to the other side (in the case of the pull type, the maintenance tube is inverted during the manufacturing process of the repair tube in the factory), and the reversing type is reversed while the inside of the repair tube is turned upside down.

The upper sewerage maintenance tube according to the prior art is composed of a lining tube and a reinforcing tube inserted into the inside of the lining tube (installation condition reference), and a thermosetting resin impregnated in the lining tube and the reinforcing tube.

Conventionally, according to the sewer repair tube, in the case of the inverting type, the repair tube is usually stored in a flat folded state or in a rolled state.

When the repair tube is installed, the repair tube is fixed in front of the tube in a state where one end is turned upside down. In this state, the inside and the outside are inverted through high pressure air to form a circular shape. When a clock is used as a reference, a large stress occurs at 3 o'clock and 9 o'clock to cause cracks (tearing, etc.).

The maintenance tube is subjected to a watertightness test after the installation. In this test, a leak is observed in the crack part of the maintenance tube. If the repair work is carried out to repair the leak, or the leakage is severe, A phenomenon of separation and re-work also occurs.

On the other hand, it is confirmed that the crack does not leak during the watertight (airtight) test, and even if the test is passed, the crack may crack due to the high pressure water pressure, and leakage may occur.

In case of pulling type as well as reversing type, the repair tube is reversed at the factory and transported to the construction site. When the repair tube is reversed at the factory, cracks are generated in the repair tube as described above, The problem described above arises because the repair tube is already cracked.

Korean Patent Publication No. 2009-0079304 Korean Patent Registration No. 10-0719436

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a water- The present invention has been made to solve the above problems.

The tube maintenance tube reinforced with crack resistance according to the present invention comprises: a tubular reinforcing tube formed of a felt and a waterproof reinforcing film layer coated on one surface of the felt; A lining tube formed outside the reinforcing tube; Wherein the reinforcing tube and the thermosetting resin impregnated in the hybrid fabric are selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin, and a urethane resin, And a polyethylene layer are stacked one upon the other through blending, and the polyethylene layer is bonded to one surface of the felt by using the polyethylene layer as an adhesive layer.

The present invention also provides a method of manufacturing a felt, comprising: a tubular reinforcing tube formed of a felt and a waterproof reinforcing film layer coated on one surface of the felt; A lining tube formed outside the reinforcing tube; And a thermosetting resin impregnated in the reinforcing tube and the hybrid fabric, wherein the waterproof reinforcing film layer of the reinforcing tube is selected from the group consisting of a polyurethane resin or a polyurethane resin, A hot melt layer having a layered structure in which one kind of hot melt layer selected from a polyester series or a polyacryl series series is laminated through blending and a hot melt layer having a melting point lower than that of the thermoplastic resin layer as an adhesive layer is bonded to the felt .

According to the pipe repair tube with reinforced crack resistance according to the present invention, all of Examples 1 and 2 are firmly adhered to the felt through the waterproof reinforcing film layer of the reinforcing tube, so that they are not peeled off from the felt, It is possible to pass the airtightness and the watertightness test, and by securing the watertightness for a long period of time, the reliability as the tube maintenance tube can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a layered structure of a pipe maintenance tube reinforced with crack resistance according to Example 1 of the present invention. FIG.
FIG. 2 is a cross-sectional view showing a layered structure of a tube maintenance tube reinforced with cracking resistance according to Embodiment 2 of the present invention. FIG.

≪ Example 1 >

As shown in FIG. 1, the pipe maintenance tube 10 reinforced with crack resistance according to the present embodiment is composed of a reinforcing tube 20, a lining tube 30, and a thermosetting resin 40.

The reinforcing tube 20 is composed of a waterproof reinforcing film layer 22 coated on one side (the side on which the fluid (water, gas, etc.) flows) of the felt 21 and the felt 21.

The felt 1 is a material in which a woven fabric (which may be a nonwoven fabric) woven with one or more layers of polyethylene or polyester fibers or woven fabric is combined.

The waterproof reinforcing film layer 22 is coated on one surface of the felt 21 so as to prevent the fluid flowing along the inside thereof from being leaked. The polypropylene layer 22a and the polyethylene layer 22b are blended in one or more layers Layer structure. The polypropylene layer 22a and the polyethylene layer 22b may have a layered structure in which only one layer is stacked, or may have a layered structure of three layers, one of which is two and the other of which is one layer. Or may be a layered structure repeatedly laminated.

Although the figure shows only one polypropylene layer 22a and one polyethylene layer 22b, it may be composed of three layers of polypropylene layer-polyethylene layer-polypropylene layer, or four layers of polypropylene layer- It is possible.

The polypropylene layer 22a and the polyethylene layer 22b may be attached to each other through a separate adhesive layer. However, if a general adhesive is used, deformation due to temperature, pressure, or the like is generated to cause delamination, The blending is carried out in such a manner that the layer of the polypropylene layer 22a and the layer of the polyethylene layer 22b are not separated and the polypropylene layer 22a and the polyethylene layer 22b are interposed between the polypropylene layer 22a and the polyethylene layer 22b, Layer 22b are connected to each other). That is, according to the present invention, a mixed layer in which polypropylene and polyethylene are mixed is formed between the polypropylene layer 22a and the polyethylene layer 22b.

The waterproof reinforcing film layer 22 has a polyethylene layer 22b and a polypropylene layer 22a as a heat bonding layer and a support layer as the support layer, that is, the polyethylene layer 22b and the polypropylene layer 22a, And is bonded to the felt 21, thereby improving the peeling property with the felt 21, thereby preventing delamination.

The lining tube 30 may be any product that is used to repair the duct, or may be a product made from a hybrid fabric as described below.

The thermosetting resin 40 is impregnated into the reinforcing tube 20 and the lining tube 30 as any one selected from the group including vinyl ester, epoxy, unsaturated polyester, phenol resin and urethane resin, And thermally cured to lining the lining tube 30 on the inner circumferential surface of the maintenance target pipe.

The reinforcing tube 20 and the lining tube 30 are described as being separated from each other by a layered structure. However, the reinforcing tube 20 and the lining tube 30 may be integrally connected to each other by impregnation of the thermosetting resin 40.

≪ Example 2 >

As shown in FIG. 2, the pipe maintenance tube 10 reinforced with crack resistance according to the present embodiment includes a reinforcing tube 20, a lining tube 30, and a thermosetting resin 40, The waterproof reinforcing film layer 22 of the waterproof reinforcing film layer 22 of the thermoplastic resin layer 22 is formed by blending a hotmelt layer 22c and a thermoplastic resin layer 22d selected from polyurethane, And a laminated layer structure in which a mixed layer in which a plurality of interlayer insulating films 22d are mixed is interposed therebetween, and the other structures are the same as those in the first embodiment.

The melting point of the hot melt layer 22c is 70 to 140 占 폚 and the melting point of the thermoplastic resin layer 22d (e.g., polyurethane film) is 90 to 300 占 폚. The hot melt layer 22c is used as a heat- .

The hot-melt layer 22c and the thermoplastic resin layer 22d are not limited to the layers shown in the drawing, and may be composed of three layers of hot-melt layer-thermoplastic resin layer-hot-melt layer, or four or more layers.

The above-described embodiments are characterized in that cracking is prevented when the repair tube 10 is unfolded at the folded portion of the repair tube 10 through the characteristics of the waterproof reinforcement film layer 22 of the reinforcement tube 20, ) Can be fabricated as a hybrid fabric and a reinforcement function can be added.

The hybrid fabric is a layered structure formed by laminating two or more of nonwoven fabric, glass fiber, polyethylene, carbon fiber, aramid fiber, biomid cellulose fiber, and bio nano fiber, This will be described in the embodiment.

The thermosetting resin may be selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin and a urethane resin.

In addition, the lining tube may further include a nonwoven fabric laminated on the outside of the hybrid fabric. That is, the hybrid lining tube has a layered structure in which two or more of glass fiber, polyethylene, carbon fiber, aramid fiber, biomid cellulose fiber, and bio nano fiber are laminated between two nonwoven fabrics to be.

The repairing tube according to the present invention can be installed entirely in the conduit or only locally in need of repair. Since the repairing effect by the lining tube using the hybrid fabric is excellent, the repairing tube can be used efficiently for local construction.

The lining tube using the hybrid fabric may be composed of the following embodiments.

1. The lining tube 30 using the hybrid fabric is a lamellar structure in which polyester nonwoven fabric, glass fiber, and aramid fiber are laminated from the inner diameter side on the basis of a state in which they are installed in the conduit, and can be bonded or sewed with an adhesive .

The polyester nonwoven fabric may be referred to as a base layer of the hybrid lining tube 30.

Glass fiber is a glass which is mainly made of silicate. It is resistant to high temperature, does not burn, does not corrode because of chemical durability, and has high tensile strength.

As described above, the glass fiber having such characteristics can be used in a form in which the web is woven by a fiber yarn, a short fiber mat in a chop mat type, or the like.

The aramid fiber is a thermally strong and strong aromatic polyamide fiber, and the amide bond-CONH bonds with an aromatic ring such as benzene ring to form a polymer polyamide. It is excellent in tensile strength, toughness and heat resistance. It has high strength and high elasticity. It can be woven with net structure by fiber yarn, and chop mat type with short fiber.

Biomed cellulose fiber and Bio nano fiber are used as reinforcement because they are both ready-made and soft and tough.

In such layered structures of hybrid fabrics, the aramid fibers are, for example, at the outermost (conduit side) in order to effectively reinforce the conduits according to the characteristics of the aramid fibers having a high tensile strength.

Since the thickness of the lining tube 30 using the hybrid fabric can be freely adjusted through the self-thickness of the hybrid fabric, the thickness of each fabric is not limited to a specific value.

2. The lining tube 30 using the hybrid fabric is formed by laminating a polyester nonwoven fabric, a polyethylene fiber, and an aramid fiber.

The polyethylene fiber can be applied in various forms such as a mat shape and a net shape. Since it has a high impact resistance, it prevents damage due to water pressure such as constants and sewage flowing along a conduit, And a short fiber mat (chop mat) type can be used.

3. The lining tube 30 using the hybrid fabric is formed by laminating polyester nonwoven fabric, carbon (carbon) fiber, and aramid fiber.

The carbon fiber is a fiber obtained by heating and carbonizing an organic fiber in an inert gas, for example, having a strength of 10 to 20 g / d and a specific gravity of 1.5 to 2.1. It is excellent in heat resistance, impact resistance and strong against chemicals. In the heating process, molecules such as oxygen, hydrogen, and nitrogen escape from the metal (aluminum) because the weight is reduced, so that it is lighter than metal (aluminum), but has more elasticity and strength than metal (iron) And a chop mat type fiber can be used.

4. The lining tube 30 using the hybrid fabric is made of polyester nonwoven fabric, carbon fiber (or aramid fiber), biomid cellulose fiber (or bio nano fiber) An ester nonwoven fabric, a biomid cellulose fiber (or a bio nano fiber), and a carbon fiber (or an aramid fiber).

The pipe maintenance method using the pipe maintenance tube reinforced with crack resistance according to the present invention will be described as follows.

The reinforcing tube 20 and the lining tube 30 are impregnated with a thermosetting resin 40 and then stored without causing a thermosetting reaction.

In other words, the repair tube 10 of the present invention is in a state where the inside and the outside are turned upside down based on the installed state, that is, the inside of the outside of the lining tube 30 Is supported on the inner side of this conduit. At this time, since the waterproof reinforcing film layer 22 of the reinforcing tube 20 does not peel off from the felt 21 as a layered structure and does not cause cracking, no leakage of water occurs in the repair tube 10.

Then, if hot air is applied to the inside of the inverted maintenance tube 10 and then sealed, the maintenance tube 10 is expanded by the thermosetting resin 40 to lining the inside of the conduit.

In addition, according to the present invention, when the hybrid fabric is applied, the pressure by the water flow, the external earth pressure, and the external temperature are transferred to the cured maintenance tube 10, at which time the lining tube 30 of the hybrid fabric It is possible to prevent the crack propagation in the conduit, to keep the construction of the conduit firmly and to prevent the deterioration of the resin due to the influx of the water.

In the case of the pull type, the maintenance tube 10 is reversed at the factory. Even if the repair tube 10 is inverted at the factory, the repair tube 10 is not cracked. The invention is both reversible and towable.

10: Maintenance tube,
20: reinforcing tube, 21: felt
22: waterproof reinforced film layer,
30: lining tube,
40: Thermosetting resin

Claims (4)

A tubular reinforcing tube 20 consisting of a felt 21 and a waterproof film layer 22 coated on one side of the felt;
A lining tube (30) formed on the outside of the reinforcing tube;
And a thermosetting resin (40) impregnated into the reinforcing tube and the lining tube, the resin being selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin and a urethane resin,
The waterproof reinforcing film layer of the reinforcing tube has a layered structure in which a polypropylene layer and a polyethylene layer are laminated one or more layers respectively, and the polypropylene layer 22a and the polyethylene layer 22b are bonded by blending, Characterized in that a mixed layer in which polypropylene and polyethylene are mixed with each other is formed between the layer (22a) and the polyethylene layer (22b) and the polyethylene layer is bonded to one surface of the felt as an adhesive layer Maintenance tube. A reinforcing tube 20 of a tubular shape comprising a felt and a waterproof reinforcing film layer coated on one surface of the felt;
A lining tube (30) formed on the outside of the reinforcing tube;
And a thermosetting resin (40) impregnated into the reinforcing tube and the lining tube, the resin being selected from the group consisting of a vinyl ester, an epoxy, an unsaturated polyester, a phenol resin and a urethane resin,
The waterproof reinforcing film layer of the reinforcing tube is formed by blending one kind or more of a hot melt layer and a thermoplastic resin layer selected from a polyurethane type, a polyester type or a polyacryl type to form a hot melt layer 22c, a hot melt layer 22c, And a thermoplastic resin layer (22d), and a hot-melt layer having a melting point lower than that of the thermoplastic resin layer is adhered to the felt The tubes are reinforced with cracks. The lining tube according to claim 1 or 2,
A hybrid fabric of a layered structure formed by laminating two or more of a nonwoven fabric, a glass fiber, a polyethylene, a carbon fiber, an aramid fiber, a biomed cellulose fiber and a bio-nanofiber,
The hybrid fabric may be formed by laminating polyester nonwoven fabric, glass fiber, or aramid fiber from the inner diameter side, or by laminating polyester nonwoven fabric, polyethylene fiber, or aramid fiber from the inner diameter side, or polyester nonwoven fabric, , Aramid fibers laminated on one another, or polyester nonwoven fabric, carbon fiber, biomed cellulose fiber or bio-nanofiber laminated from the inner diameter side, or polyester nonwoven fabric, biomed cellulose fiber or bi nanofiber, aramid Wherein the reinforcing tube is reinforced with crack resistance. The ductility maintenance tube according to claim 3, wherein the lining tube includes a nonwoven fabric laminated on the outside of the hybrid fabric.

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