KR101369000B1 - Seamless circular knitting reinforcing-repairing tube - Google Patents

Abstract

The present invention relates to a seamless type circularly knitted fabric tube for reinforcing and repairing a trench-less pipe. The circularly knitted fabric tube of the present invention is to optimally reinforce the strength of the tube and adhere to the pipe through strong adhesive strength by being lined on an inner peripheral surface of the pipe to repair the pipe to the same level as a new pipe, forming the seamless circularly knitted fabric tube to have a triply or more structure, and being impregnated with resins having different uses in accordance with the use thereof. The seamless type circularly knitted fabric tube for reinforcing and repairing a trench-less pipe comprises: a coated fabric tube, a mesh fabric tube, and a boundary fabric tube, which are knitted seamlessly and circularly; and first and second thermosetting resins, wherein the mesh fabric tube and the boundary fabric tube are impregnated with the first and second thermosetting resins, respectively. The first thermosetting resin is used to control the thickness of the pipe, and made of a mixture of a liquid resin and a filler. The second thermosetting resin is used to allow the circularly knitted fabric tube to adhere to an internal wall of the pipe, and is made of any one selected from the group consisting of epoxy. The circularly knitted fabric tube of the present invention has a layer structure of the coated fabric layer, the mesh fabric layer impregnated with the first thermosetting resin, and the boundary fabric layer impregnated with the second thermosetting resin from the inside through thermosetting of the first and second thermosetting reins. [Reference numerals] (AA) Filler; (BB) First thermosetting resin; (CC) Second thermosetting resin

Description

SEWLESS CIRCULAR KNITTING REINFORCING-REPAIRING TUBE} SEWLESS CIRCULAR KNITTING REINFORCING-REPAIRING TUBE

The present invention relates to a non-excavated tube repair reinforcement tube, and more specifically, to the conservative property of conduit by constructing three or more layers of the fabric tube of the circular knitting, by using the resin of different characteristics to increase the strength and adhesion of the tube itself It relates to a non-extruded tube seamless reinforcing circular knitting fabric tube can be improved.

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

Such conduits cause cracks, etc., when they are buried for a long time, which causes cracks in the joints connecting the pipes, and obstructs the flow of sewage due to sedimentation. The entire conduit must be replaced by excavating the ground. Since the replacement of such conduits is expensive and time-consuming, a method of repairing conduits instead of replacing the conduits 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.

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.

Conventional water and sewage conduit repair tube is composed of a method of winding the fabric of the tube in the same shape as the conduit, and then joining the opposite sides, and in the joining method, the two sides of the flat fabric are overlapped and sewn and glued (glued) ), A method of bonding both sides through the bonding fabric using a separate bonding fabric, and the like.

According to the conventional tube as described above, the manufacturing process is complicated, as the manufacturing process is complicated and the manufacturing process takes longer and the manufacturing cost increases and the joint surface is weak as it requires a process of cutting, sewing, and joining a flat fabric in accordance with the diameter. There is a problem, and since only one type of resin can be used, the maintenance cycle is faster because the strength is weak or the adhesive strength is insufficient because the two objectives of strength reinforcement and adhesive strength are not achieved.

Patent Registration No. 10-1166247

The present invention is to solve the problems as described above, lining the inner circumferential surface of the conduit to repair the conduit to the same level as the fuse, and composed of three or more layers of annular fabric tube without joints and uses the resin of different uses It is an object of the present invention to provide a seamless flattened circular tube for non-excavation tube repair reinforcement that can be bonded by impregnation to a tube having a much improved mechanical strength and strong adhesion compared to a nonwoven tube of the same thickness.

The seamless knitted circular knitting fabric tube of the non-excavated tube repair reinforcement according to the present invention may be formed into a coated fabric tube, a mesh fabric tube, a boundary fabric tube and the mesh fabric tube and the boundary fabric tube, respectively, each made of a circular portion of a non-bonded portion. The first and second thermosetting resins are impregnated, wherein the first thermosetting resin forms a thickness, and is made of a mixture of a liquid resin and a filler. The second thermosetting resin is epoxy for adhering to the inner wall of the tube. Any one selected from the group consisting of, the first layer of the thermosetting resin through the thermosetting of the coating fabric layer, the first layer of the mesh fabric layer impregnated with the first thermosetting resin, the layer of the boundary fabric layer impregnated with the second thermosetting resin It is characterized by the structure.

According to the present invention, the non-extruded tube repairing reinforcing rod-shaped nonwoven fabric tube is lined to the inner wall of the repair tube to repair the inner wall of the repair pipe as a fuse so that the conduit can be used for a long time without replacing the replacement of the conduit, etc. Unlike conventional non-woven tubes, it is possible to reduce costs, and by using three or more different circular knitting fabrics with different properties and resins for different applications, it is possible to bond tubes with high mechanical strength and strong adhesion even at a thinner thickness. It is economical and has very good performance. In addition, the life of conduits can be extended, reducing the cost of frequent maintenance.

1 is a view showing a configuration of a seamless knitted circular knitting tube for non-excavation tube repair reinforcement according to the present invention.
Figure 2 is a cross-sectional view of the non-extruded tube repair reinforcing rod-shaped circular knitting fabric tube constructed in the repair tube according to the present invention.
Figure 3 is a schematic view of the construction state of the seamless knitted circular knitting fabric tube for non-excavation tube repair reinforcement according to the present invention.

As shown in Figures 1 to 3, the non-extruded tube repair reinforcement-free seamless circular knitting fabric tube 10 (hereinafter, abbreviated as 'tube'), each made of a non-bonded circular piece It consists of three or more layers of fabric and two different types of thermosetting resins. In an embodiment of the present invention, the fabric is coated with a fabric tube 11, a mesh fabric tube 12, a boundary fabric tube 13, and a thermosetting resin. The first thermosetting resin 14 for forming the thickness and the second thermosetting resin 15 for bonding will be described.

The fabrics are all circular knit fabric tubes woven through a circular knitting machine so that there is no joint, thus preventing problems caused by the joint (complex manufacturing process, separation of the joint, deterioration of mechanical strength, etc.).

When the tube 10 has a total thickness of 10T (mm), the coated fabric tube 11 is composed of 1 to 3T, the mesh fabric tube 12 is composed of 5 to 8T, and the boundary fabric tube 13 is composed of 1 to 2T. do.

The fabric is woven with the yarn (fiber yarn) inclined with the weft yarn, the type of yarn can be manufactured using all kinds of yarn, such as synthetic fiber, glass, carbon, elastic fibers, depending on the choice of yarn having different properties Various types of tubes are made. For example,

end. High strength tube: glass fiber yarn, carbon fiber yarn, kevlar fiber yarn.

I. Tube for shape change: Use of elastic fiber yarn, spandex, lycra fiber yarn.

All. Heat-resistant tube: glass fiber yarn, carbon fiber yarn, silica fiber yarn used.

Using such a variety of fiber yarns it is possible to manufacture a tube suitable for the requirements of the conduit. It can be effectively used for the part with different diameter, such as the expansion pipe, and the conduit includes the part where the different diameter is jointed, the curved section, and the use of the tube or the curved tube of the different diameter in these parts It would be very unreasonable and, according to the present invention, by using elastic fiber yarns that are elastically deformable, it is easily applied to the section and the curved section where the diameter of the pipe varies. That is, such functional fiber yarns may be applied to both of the weft and the warp or to both the weft and the warp to meet the purpose.

As shown in Figures 1 to 3, it will be described in detail for each fabric and thermosetting resin applied to the tube 10 of the present invention.

1. circular knitting fabric tube.

end. Coated Fabric tube-1 Layer.

Woven in the innermost part of the conservative tube (1) and woven into a circular piece using a thin yarn, the first thermosetting resin (14) is stored so as not to leak into the conservative tube (1) and the tube (10) In order to support the synthetic resin coating layer (11a) is formed on the surface (water side).

More specifically, the coated fabric tube 11 is a woven fabric formed by weft and warp yarns, so that uneven irregularities are formed, and because it is disposed in contact with water, coarse yarn [for example, 10,000 to 50,000 denia (denier)], the irregularities on the surface of the fabric, the greater the friction and resistance to the fluid (water, etc.) inside the conduit tube (1), the higher the wear of the synthetic resin coating layer (11a) and the flow of fluid Slow down

That is, compared to the conventional sewing non-woven reinforcement tube coated fabric tube 11 is produced by reducing the unevenness using the yarn of the denier (Denier) as thin as possible. Therefore, after the resin coating, the friction force and flow rate similar to those of the nonwoven tube can be maintained.

For this purpose, the yarn of the coated fabric fabric 11 is preferably 500 to 3,000 denier and densely woven to 20 to 100 densities, and the numerical range of the denier and density is broken of the yarn. It does not occur, so weaving of the fabric is possible, but by minimizing the size of the unevenness, it is an optimal numerical range that can prevent the flow of fluid and adsorption of foreign matters. There is a drawback to growing.

For reference, when one-ply fabric tube is used, it is inevitable to use a thick yarn due to the inevitable thickness control, and eventually causes the aforementioned problem, but the tube 10 of the present invention is composed of a multi-layer fabric, It is possible to construct a coated fabric tube 11 of a thin yarn that can prevent the flow rate and accumulation of foreign matter.

Since the synthetic resin used for the synthetic resin coating layer 11a is a product widely used in the technical field related to the present invention, it does not describe specific types (for example, PE, PP, PU, PVC, etc.), and also various thicknesses may be implemented. No specific numerical value is given.

I. Mesh Fabric tube-2 Layer

The central portion of the tube 10 consists of a mesh woven tube 12 woven in the form of a mesh.

The mesh fabric tube 12 serves to control the thickness and strength of the tube 10 and, therefore, is woven into a circular knit fabric in the form of a net using a high strength and thick yarn.

Yarn of the mesh fabric tube 12 for achieving the above object is used 10,000 to 50,000 denier (it is difficult to adjust the thickness when less than 10,000 denier and difficult to weave when 50,000 denier or more).

The mesh fabric tube 12 adjusts the thickness through the characteristics of the yarn (denia, strength), and also adjusts the thickness through the impregnation of the first thermosetting resin 14, and because of the porous net form, the first through the hole Impregnation of the thermosetting resin 14 is easy.

Thus, as the impregnation of the first thermosetting resin 14 through the mesh fabric tube 12, various selection of the first thermosetting resin 14 is possible, and the first thermosetting resin 14 will be described in detail below. Explain. For reference, the conventional nonwoven tube has a problem in that it is difficult to impregnate when it is impregnated with a thermosetting resin using a filler having high viscosity or coarse particles, so that only a thermosetting resin using a filler having a low viscosity and very fine particles is used.

All. Barrier Fabric tube-3 Layer.

The boundary fabric tube 13 is the portion directly bonded to the water supply tube 1 to the outermost portion of the tube 10 and also serves as a boundary between the two types of first and second thermosetting resins 14 and 15. It is woven tightly (20-100 Tensity) using ~ 3,000 denier thin yarns. According to the thickness and organization chart of the yarn, as the area directly bonded to the repair tube 1 increases, the adhesive strength can be increased, and foreign substances remaining after the pre-cleaning operation for rehabilitation of the repair tube 1 (for example, Rust, stone powder, unpeeled coating material, etc.) fills the holes and irregularities of the fabric, thereby increasing the surface adhesion. In addition, the numerical value of the thickness and density of the yarn of the boundary fabric tube 13 is a numerical value for achieving the boundary objective by not mixing the 1st, 2nd thermosetting resin 14,15.

In the case of inversion type construction, when the second thermosetting resin 15 is impregnated inside the boundary fabric tube 13 when the tube is manufactured and inverted at the construction site, the boundary fabric tube 13 is repaired. ) It is directly bonded to the surface. In the case of pull-in construction, the film tube (protective vinyl) is impregnated by impregnating the second thermosetting resin (15) between the boundary fabric tube (13) and the outermost film tube (protective vinyl). It is adhered to the surface of the repair tube 1. Film tube (protective vinyl) enhances adhesive strength by using vinyl that melts during thermosetting.

2. Resin.

The present invention uses the first and second thermosetting resins as thermosetting resins having different characteristics.

In the case of the conventional nonwoven fabric reinforcement tube composed of two or more layers, it is difficult to separate layers between resins due to the characteristics of the nonwoven fabric, so that different resins are mixed with each other, making it difficult to use different composite resins for each layer.

However, in the tube of the present invention, the tube 10, which is a repair purpose of the existing tube, may form a resin layer using thermosetting resins having different characteristics in accordance with the characteristics of the center portion and the adhesive portion of the tube 10.

For example, in the case of water / sewage reinforcement tube, the coated fabric tube 11 (coating fabric layer) and the mesh fabric tube 12 (mesh fabric layer), which are central parts, withstand the internal and external pressure and impact of the water supply tube 1. The first thermosetting resin to which high strength resin and filler are added so as to be used, and the boundary fabric tube 13 (boundary fabric layer) directly adhering to the existing water supply tube 1 is provided with water, moisture, rust and foreign substances. Two or more types of composite resin layers can be formed using a special purpose second thermosetting resin which exhibits strong adhesive strength even in the conditions mentioned above to the existing existing water pipe 1.

end. First thermosetting resin.

The first thermosetting resin is used to adjust the thickness and reinforce the strength, and consists of a mixture of liquid (gel-like) resin and various fillers.

The resin may be used in one or more of the group comprising an epoxy resin, an unsaturated polyester (UP) resin or a vinyl ester resin, depending on the purpose of the first thermosetting resin.

Since fillers are used for the purpose of strengthening the properties of resins, inorganic and metal fillers are mainly used. The types of fillers are powdered forms such as calcined alumina, silica, sand, aluminum, aluminum oxide, quartz powder, glass beads and ceramic balls. Any one or two or more selected from spherical shapes, such as ceramic balls and plastic balls, and staple fibers such as acrylic, PE / PP, and polyester, may be added in a fixed ratio. . It is used in the range of particle size (1-50 micron), diameter of sphere (50-300 micron), and length of fiber (2-6 mm). Fillers improve the mechanical properties of cured resins, which mainly play a role in reducing the coefficient of thermal expansion, reducing the rate of curing shrinkage, controlling heat generation during curing, extending pot life, improving adhesion, increasing mechanical strength, improving wear resistance, and reducing costs. . In addition, the function can be different depending on the shape, powder form is easy to uniformly mix with the resin and can reduce the separation between the resin and filler, spherical shape improves the strength and flowability, the fiber form is thixotropic ( Thixotropy) increases adhesion to fabric tubes and reduces cracks.

The mixing ratio of the first thermosetting resin and the filler is composed of 60 to 80% by weight of the thermosetting resin and 20 to 40% by weight of the filler on the basis of weight. If the amount of the filler is small or large out of the above range, the target mechanical properties may be weakened. Can be.

The first thermosetting resin is injected into the coated fabric tube 11 and the mesh fabric tube 12 to form a layer. That is, since the mesh fabric tube 12 is porous, when the first thermosetting resin is injected between the mesh fabric tube 12 and the boundary fabric tube 13, the first thermosetting resin passes through the mesh fabric tube 12 to coat the coated fabric. It is also filled between the tube 11 and the mesh fabric tube 12. That is, the first thermosetting resin may be injected into the coated fabric tube 11 and the mesh fabric tube 12 to be filled and cured between the coated fabric tube 11 and the mesh fabric tube 12 and the boundary fabric tube 13. .

I. 2nd thermosetting resin.

The second thermosetting resin is injected into the inner side of the boundary fabric tube 13 and directly adhered to the repair pipe 1 during the inversion construction, and injected into the outside when the pull in construction is applied to the film tube (protective vinyl). ) And is bonded to the water supply pipe 1, and a special purpose resin is used. The special resin is a resin manufactured according to the purpose and purpose. Due to the characteristics of the repair tube 1, there are environments and conditions that hinder adhesion to the surface of the repair tube 1. It is to increase the adhesive strength with 1).

For example, water pipes, sewer pipes, hot water pipes, gas pipes, oil pipes, etc. are different from the new pipes produced at the factory, and deformation occurs over time, and foreign substances exist due to various causes on the inner circumference. Special resins are used to ensure firm adhesion even under the condition of these foreign matters, since they cannot be removed completely after cleaning. The special resin for achieving the above object is any one selected from the group consisting of a strong epoxy resin.

The second thermosetting resin can be used only as a liquid (gel-like) epoxy resin, and the thermal expansion coefficient and the curing shrinkage ratio of the resin layer (the layer made of the first thermosetting resin) and the adhesive strengthening with the water supply pipe 1 and the water supply pipe 1 are the same. Fillers may be mixed and used to keep the same to similar.

The filler is in the form of powders such as calcined alumina, silica, glass, metal, and fiber.

The filler is to maintain a high adhesion to the maintenance tube (1) and to show the same or similar shrinkage / expansion rate with the first thermosetting resin layer, may exhibit different properties depending on the shape, in the case of powder form shrinkage Adjusts the expansion rate and, in the form of fibers, improves adhesion to fabric tubes and reduces cracking.

The second thermosetting resin may be used by mixing 80 to 90% by weight of the epoxy resin and 10 to 20% by weight of the filler. The filler may have the same properties (particle size, etc.) as the filler used in the first thermosetting resin, and may improve mechanical properties, but may weaken the adhesive strength, so an amount less than that used in the first thermosetting resin is used. . That is, when the filler is mixed at less than 10% by weight, the shrinkage / expansion rate of the first thermosetting resin layer is significantly different, so that peeling and deformation may occur, and when the filler is mixed at more than 20% by weight, the adhesive strength may be lowered.

In the tube 10 of the present invention, the fabric tubes 11, 12 and 13 and the first and second thermosetting resins 14 and 15 are separated from each other until the first and second thermosetting resins are cured by heat. to be.

The first thermosetting resin 14 is replaced with a mesh fabric tube 12 (between the mesh fabric tube 12 and the boundary fabric tube 13 or between the mesh fabric tube 12 and the coated fabric tube for repair of the repair tube 1). (11), and the second thermosetting resin (15) is injected between the inner side of the boundary fabric tube (13) or between the impregnated tube (protective vinyl) 16, the mesh fabric tube (12) is porous The border fabric tube 13 is such that the first thermosetting resin does not pass through, so the first thermosetting resin is from the outer side of the coated fabric tube 11 to the mesh fabric tube 12 to the inner side of the border fabric tube 13. On the other hand, the second thermosetting resin is injected to the outside of the boundary fabric tube 13, and is inverted during the inversion construction and adhered to the maintenance tube (1).

The tube 10 is lined on the inner wall of the repair pipe 1 in a state in which the first and second thermosetting resins are not cured by heat, and when steam or hot water is injected, the first and second thermosetting resins are cured and constructed. .

The repair reinforcement layer constructed as above is composed of a layered structure of a coating fabric layer, a mesh fabric layer impregnated with the first thermosetting resin, and a boundary fabric layer impregnated with the second thermosetting resin, and the boundary fabric tube 13 and the second from the inside. The surface of the tube 10 is firmly adhered to the inner wall of the repair tube 1 by thermosetting resin, and foreign matter on the inner wall of the repair tube 1 is received in the recessed portion of the boundary fabric tube 13 so that the tube 10 There is no gap between the face of) and the inner wall of the conservative tube (1) and as a result all the surfaces of the tube (10) are bonded to the inner wall of the conservative tube (1).

The boundary fabric tube 13 prevents the first and second thermosetting resins from mixing with each other, but a small amount of the first thermosetting resin and / or the second thermosetting resin passes through the boundary fabric tube 13 through the aperture of the fabric. Since they are bonded to each other, the mesh fabric layer and the boundary fabric layer can be synthesized integrally.

Until now, the present invention has been described as a non-extruded tube-shaped round knitting fabric tube for repair reinforcement, but is not limited to being used only for repair of the non-excavation tube, it is applicable to all techniques for repairing and lining the inner circumferential surface of the tube will be.

1: conservative
10: circular knitting fabric tube in the seamless form for reinforcing non-excavated pipe,
11: coated fabric tube, 12: mesh fabric tube
13: boundary fabric tube, 14: first thermosetting resin
15: second thermosetting resin,

Claims (7)

Coated fabric tube, mesh fabric tube, boundary fabric tube and the first and second thermosetting resins impregnated in the mesh fabric tube and the boundary fabric tube, respectively, each made of a circular piece of non-bonded portion, wherein the first thermosetting resin has a thickness Forming a mixture of the liquid resin and the filler, the second thermosetting resin is any one selected from the group containing epoxy for adhering to the inner wall of the tube,
From the inside through the thermosetting of the first and second thermosetting resins, the coating fabric layer, a mesh fabric layer impregnated with the first thermosetting resin, a boundary layer of the impregnated fabric layer impregnated with the second thermosetting resin, characterized in that Seamless knitted circular knit tube for reinforcement of excavation pipes. The method of claim 1, wherein the woven tube weft yarn of any one selected from artificial fiber yarns, polyester fiber yarns, plastic fiber yarns, glass fiber yarns, carbon fiber yarns, Kevlar fiber yarns, silica fiber yarns, elastic fiber yarns The seamless knitted circular knitting tube for non-excavation tube repair reinforcement, characterized in that it is made by using one or more of the inclination. The method of claim 1, wherein the first thermosetting resin for the non-excavation pipe reinforcement reinforcement, characterized in that made of a mixture of one or more resins and fillers selected from the group consisting of epoxy resins, unsaturated polyester (UP) resin and vinyl ester resin. Circular knitting fabric tube in seamless form. The seamless knitting fabric tube according to any one of claims 1 to 3, wherein the second thermosetting resin is a mixture of an epoxy resin and a filler. The method of claim 4, wherein the filler is mixed with the first and second thermosetting resins, powdered filler including calcined alumina, silica, sand, aluminum and quartz, glass beads, ceramic balls, plastics. A seamless knitted circular knit tube for non-excavation tube reinforcement, characterized in that it is at least one of a spherical filler comprising a plastic ball, and a fibrous filler comprising acrylic, PE / PP, and polyester. The method of claim 3, wherein the first thermosetting resin is 60 to 80% by weight of the liquid resin, 20 to 40% by weight of the filler is a non-extruded tube repair reinforcing reinforcing rod-shaped fabric tube, characterized in that the mixture. The method of claim 4, wherein the second thermosetting resin is 80 to 90% by weight of the epoxy resin, 10 to 20% by weight of the filler is a non-extruded tube repair reinforcing reinforcing rod-shaped woven tube, characterized in that the mixture.

Images