KR102026584B1 - String Unit for preventing scale and corrosion - Google Patents

Abstract

The present invention relates to a string unit for preventing scale regeneration of a joint end portion and a branching portion, and more specifically to a string unit for preventing scale regeneration of a joint end portion and a branching portion, which prevents a scale from being generated by being delaminated between pipe end portions of a site hardening pipe and a conventional pipe. The present invention conversely inserts the site hardening pipe, hardens the site hardening pipe, rehabilitates a pipe path, and is coupled to the end of the site hardening pipe adhering to the pipe end portion to come in contact with the pipe end portion.

Description

String Unit for Preventing Scale and Corrosion

The present invention relates to a joint end and branch scale reoccurrence inhibiting string unit. More specifically, in the pipe rehabilitation method in which the impregnated tube is inserted inversely, tap water penetrates into the joint end and the branch part, and scale is generated, thereby causing separation between cured in place pipes and the existing pipe. It relates to a string unit that is attached to the joint end and branch to prevent the.

In general, various pipelines including sewer pipes are connected to each home or factory to transport sewage to a sewage treatment plant. Such sewer pipes are installed throughout the city.

Such sewage pipes carry sewage and wastewater over time, so they age over time and are corroded by oxidants such as sewage and outflow of sewage pipes. If the sewage is leaked out through the old sewer pipe, it causes soil contamination and groundwater contamination.

In order to prevent the contamination of the soil and groundwater, the old sewer pipes are replaced. To replace the sewer pipes, the sewer pipes are buried and the old sewer pipes are separated and a new sewer pipe is buried. Using this excavation method replaces the sewage pipe with a new one, which solves the fundamental problem and costs a lot of excavation. However, the excavation method takes a long time because the sewer pipes need to be replaced after excavating the place where the sewer pipes are buried, and when the construction is carried out in a complicated city center, it causes too much congestion in traffic. There is a problem of excessive social overhead costs.

In order to solve the problems of the excavation method, the CIPP (Cured-in-Placed Pipe) method is installed to prevent the sewage from leaking out of the conduit by installing a liner inside the sewage pipe without digging the sewer pipe. Developed.

Such a method is a method for preventing the outflow of sewage to the outside by inserting a tube with a thermosetting resin impregnated inside the sewer pipe to harden, the traction method and the reverse method is used in Korea.

The traction method was developed in Korea, and a tube with a coating layer formed on the inner surface and a resin-impregnated surface on the outer surface was pulled into the sewer pipe, and then expanded by supplying air pressure or hydrostatic pressure therein to the outside surface of the sewer pipe. While maintaining a close contact with heat, the tube is allowed to cure.

This traction method is not used well because the thickness of the finished lining pipe in some cases a certain situation occurs to inhibit the flow of sewage.

In the reverse method, a resin-impregnated surface is formed on the inner surface, and a coated tube is installed inside the sewer pipe on the outer surface, and then inverted and heated so that the coated surface becomes the inner surface and the surface impregnated with the resin becomes the outer surface. It is a method that is hardly adhered to the inside, and the finished form is denser than that of the traction method, and it is used in many cases, but when the thickness of the tube becomes thick according to the design conditions because the inversion is performed in the state where the thermosetting resin is impregnated. There is a problem in that the thickness of the tube becomes thick and the inversion is not easy.

Briefly looking at the water pipe rehabilitation method, the water pipe rehabilitation method is a method for inserting and fixing the impregnated tube formed of the waterproof coating layer and the adhesive resin impregnated felt layer into the old water supply pipe.

That is, as the adhesive resin impregnated felt layer is disposed on the inner surface and the waterproof coating layer is disposed on the surface, the impregnated tube is inverted into the water supply pipeline, which is the rehabilitation pipe, and then the adhesive resin impregnated felt layer, which is the inner surface, is inverted to the surface It is a method of attaching a reinforcement tube to the inner wall of a water supply and sewage pipeline by making it adhere to the inner wall of a water supply pipeline.

Among such water pipe rehabilitation methods, a method of curing a reinforcement tube by a hydrothermal reversal insertion after hot water insertion and a method of curing a reinforcement tube by steam heat after a pneumatic reversal insertion are most widely known.

The method of curing the reinforcement tube with hot water after inserting the hydraulic pressure reversal of the former, not only consumes energy by operating the boiler for a long time to heat the water for curing with hot water, but also complaints can be generated by noise. Additional costs are incurred for the water supply required for heating and the hot water treatment used for curing after completion of curing.

The method of curing the reinforcement tube by steam heat after inserting the air pressure reversal in the latter method has no self-weight compared to the hydraulic method, and when the boiler is operated for a long time, the amount of condensate is increased in proportion to the time, and heat transfer due to the condensate is not possible. There may be an uncured occurrence, and there is a problem that wrinkles may occur at the inlet of the pipe due to the narrow working tool.

Recently, the method of curing the reinforcement tube by hot water heat after the hydraulic reversal insertion is a situation that uses a lot of methods to cure the reinforcement tube by steam heat after the air pressure reversal insertion because the curing time takes a long time.

In this case, the method of curing the impregnated tube by steam heat after the air pressure reversal insertion generally uses an epoxy resin using a basic material such as bisphenol A, phenol as the impregnated felt layer, that is, the resin layer. When the impregnated tube including the resin layer is configured to boil and vaporize due to high temperature during curing, air pockets are formed, and thus the strength of the newly formed pipe line is reduced by the air pockets, or brittle fracture occurs due to elongation. In order to prevent this, when curing at a high temperature in a short time there was a problem that the curing time is too small to reach the design strength due to curing.

In addition, due to insufficient protection, the tap water penetrates between the cutting edge of the existing pipe and the site hardened pipe as time passes. Therefore, the phenomenon of peeling from the site hardening pipe and the existing pipe occurs.

Therefore, the development of a string unit to suppress scale reoccurrence between the branch between the joint end and the field hardening tube and the field hardening tube is required.

Republic of Korea Patent Registration 10-1804486 Republic of Korea Patent Registration 10-0921481 Republic of Korea Patent Registration 10-0949956 Republic of Korea Patent Registration 10-1083115

Therefore, the present invention has been made to solve the conventional problems as described above, according to an embodiment of the present invention, the joint end, or pipe end portion corresponding to the branched portion that is perforated such as sperm tube, air valve, Ito valve Insufficient protection treatment, so that tap water penetrates into existing pipe cut surfaces and cured in place pipes over time to prevent scale from peeling off on site hardening pipes. The purpose of the present invention is to remove the scale occurrence factor by applying the adhered portion to the existing tube cut surface and the site hardening tube and attaching the scale regeneration suppression string unit.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those skilled in the art from the following description. It can be understood.

A first object of the present invention is a string unit for preventing peeling of cured in place pipes by preventing the scale from being regenerated due to chlorine component contact of tap water between the impregnated tube and the pipe end of the existing pipe. In, the impregnated tube inverted insert and hardening the impregnated tube to reconstruct the conduit, the joint end and the joint end, characterized in that coupled to contact with the end of the field hardened tube adhered to the tube end portion It can be achieved as a scale generation suppression string unit.

And the pipe end may be a branch end perforated for at least one of the joint end, the sperm tube, the air valve, the Ito valve.

In addition, the tube end portion may further comprise an adhesive layer applied to the adhesive surface of the string unit in contact with the field hardening tube.

And the adhesive layer may be characterized in that consisting of fast curing polyurethane resin.

In addition, the string unit is inserted into the inner surface of the end of the hardened tube, the outer surface is bonded to the outer surface by the fast-curable polyurethane resin, the end of the tube end portion and the end of the hardened polyurethane tube on the end of the hardened polyurethane resin It may be characterized by including a flange portion bonded by.

The string unit may be made of SUS 316.

In addition, the impregnated tube may be characterized in that the film layer and the felt and the resin layer is sequentially laminated from the outside to the inside.

And a second object of the present invention is the step of inverting the impregnated tube comprising a resin layer impregnated with polyurethane in the existing pipe; Curing the impregnating tube by vapor heat curing and natural curing; And coupling the string unit according to the aforementioned first purpose to be in contact with the pipe end of the existing pipe and the end of the site hardened pipe adhered to the pipe end. It can be achieved as a rehabilitation method.

In addition, before the step of coupling the string unit, it may be characterized in that it further comprises the step of applying a fast-curing polyurethane resin on the adhesive surface of the string unit or the tube end and the end of the field-curing tube.

And the step of coupling the string unit, the insertion end of the string unit is inserted into the inner surface of the end of the hardening tube end is bonded to the outer surface by the fast curing polyurethane resin, the flange portion of the tube end end surface and the field hardening It may be characterized in that the end of the tube is adhered by the fast curing polyurethane resin.

Insufficient protection treatment on the perforated parts such as pipe end, sperm pipe, air valve, and Ito valve. As time passes, tap water penetrates the existing pipe cutting surface and field hardening pipe, and scale is generated. In order to prevent the peeling), by applying a fast curing polyurethane resin to the existing pipe cut surface and the site bonded to the in-situ hardened pipe, the scale regeneration suppression string unit according to the embodiment of the present invention is attached to reduce the factors of scale generation It has an effect that can be removed.

On the other hand, the effect obtained in the present invention is not limited to the above-mentioned effects, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. Could be.

The following drawings, which are attached to this specification, illustrate one preferred embodiment of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
Figure 1a is a perspective view of the tube end side is installed string unit according to an embodiment of the present invention,
1B is a perspective view of a pipe end scale generation suppression string unit for an air valve according to an embodiment of the present invention;
Figure 1c is a perspective view of the Ito valve pipe end scale generation suppression string unit according to an embodiment of the present invention,
2 is a cross-sectional view showing an impregnation tube before reversal insertion according to an embodiment of the present invention,
3 is a perspective view and a cross-sectional view showing the point of occurrence of scale between the joint end of the rehabilitation object pipe and the field hardening pipe,
Figure 4 is a perspective view of the joint end and branch scale regeneration suppression string unit according to an embodiment of the present invention,
5 is a cross-sectional view of the joint end and branch scale regeneration suppression string unit according to an embodiment of the present invention;
Figure 6a is a cross-sectional view of a fast curing polyurethane resin is applied to the inner surface and the end surface of the field hardening pipe, the end surface and the outer surface of the existing pipe, according to an embodiment of the present invention,
6B illustrates a cross-sectional view of a state in which the joint end and branch scale regeneration suppression string units are mounted according to an exemplary embodiment of the present invention.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art.

In the present specification, when a component is mentioned to be on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components are exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and / or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Therefore, the shape of the exemplary diagram may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in forms generated according to manufacturing processes. For example, the region shown at right angles may be rounded or have a predetermined curvature. Thus, the regions illustrated in the figures have properties, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device and is not intended to limit the scope of the invention. Although terms such as first and second are used to describe various components in various embodiments of the present specification, these components should not be limited by such terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific details are set forth in order to explain the invention more specifically and to help understand. However, those skilled in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention which are commonly known in the description of the invention and which are not highly related to the invention are not described in order to prevent confusion in explaining the invention without cause.

Hereinafter, in the pipe rehabilitation method for reversing the impregnation tube according to an embodiment of the present invention, tap water penetrates into the joint end 10 and the branch side, and scale is generated, thereby causing cured in place pipes (100). And the string unit 200 attached to the joint end and the branch in order to prevent the phenomenon that peeling occurs between the existing pipe (1).

In order to prevent the phenomenon that the site hardening pipe 100 is peeled off due to insufficient water protection and penetrating tap water into the existing pipe cutting surface and the site hardening pipe 100 as the time passes, the scale is generated. According to an embodiment of the present invention, the adhesive layer is adhered to the existing tube cut surface and the in-situ hardened tube 100 with the fast-curable polyurethane resin 20, and the scale reoccurrence suppression string unit 200 is attached to remove the scale occurrence factor. It becomes possible. Figure 1a is a perspective view of the tube end side is installed string unit according to an embodiment of the present invention, Figure 1b is a perspective view of a pipe end scale generation suppression string unit for an air valve according to an embodiment of the present invention; 1C illustrates a perspective view of an ITO valve pipe end scale generation suppression string unit according to an exemplary embodiment of the present invention.

Regeneration method according to an embodiment of the present invention inverts the impregnated tube 100 including the resin layer impregnated with polyurethane in the existing pipe (1). Reverse insertion of the impregnation tube 100 through the inverter in the view point (2). That is, the inner surface of the impregnated tube 100 is inverted to be in close contact with the inner surface of the existing tube 1 as the outer surface, and the outer surface of the impregnated tube 100 becomes the inner surface after reversal insertion.

Then, the impregnated tube is hardened by steam heat curing and natural hardening to form the spot hardening tube 100. At this time, the impregnated tube is expanded by maintaining the heat of steam at 105 ° C. so that the hardening tube 100 is adhered to the inner surface of the existing tube 1.

2 is a cross-sectional view showing the impregnation tube before reversal insertion according to an embodiment of the present invention. As shown in FIG. 2, the film layer 110, the felt 120, and the resin layer 130 are sequentially stacked from the outside to the inside. At this time, the impregnated tube 100 shown in FIG. 2 is in an impregnated state, and in the future, the repair work of the existing pipe 1 is reversed and inserted into the existing pipe 1.

The felt 120 is a woven fabric of polyester long fibers in a double structure. A nonwoven fabric mainly used conventionally is replaced by a woven fabric, and the woven fabric is made of a polyester long fiber in a double structure. In addition, the felt 120 may be woven from polyester short fibers, but when woven into short fibers, the dust collecting efficiency and waterproofness are excellent, but the physical strength is lower than that of the long fibers.

Therefore, it is woven with polyester long fibers to reinforce the strength of the impregnated tube 100, which is inverted by high pressure compressed air, and in this state is woven into a double structure for strength improvement. For this reason, although the impregnation tube 100 of this invention consists of a single blood, its intensity | strength is strong enough to withstand high pressure compressed air. In addition, the woven fabric woven in a double structure with respect to the resin impregnated on one surface of the felt 120 has an excellent function of retaining the impregnated resin so as not to flow down.

The film layer 110 is a member coated on one surface of the felt 120, polyethylene is obtained by using a metallocene as a catalyst. Resin approved by the EU and USA (FDA), it is an environmentally friendly resin that is harmless to humans even after drinking water flowing inside the pipe including tap water. In addition, the melting point is high, but the flexibility is excellent, the workability is excellent when inserting the impregnation tube 100 in the field. In addition, it is excellent in water resistance, heat resistance, and durability, and in particular, excellent in adhesive strength with the felt 120 made of polyester.

The resin layer 130 is impregnated on one surface of the felt 120 on the opposite side of the film layer 110, and is formed by impregnating a resin having a two-component structure of polyurethane. The two-component resin of polyurethane is an environmentally friendly resin which is very excellent in hydrolysis resistance, excellent in heat resistance and durability, and in which basic materials such as bisphenol A and phenol, which are conventionally used in epoxy resins, are not used at all. Here, in the past, when the in-situ curing tube 100 was hardened by steam heat, a large amount of phenol was released from the epoxy.

In addition, the polyurethane two-component resin is naturally cured in the state of room temperature without the use of steam heat, such as the epoxy resin that has been used as a conventional resin, it is possible to spontaneously cure carbon dioxide does not occur, and with the adherend Adhesive strength is also very good. As such, the polyurethane two-component resin has a relatively short curing time compared to the epoxy resin and is cured actively even in the absence of separate steam heat, thereby preventing or minimizing the occurrence of air pockets and longitudinal lifting. Make the effect come true.

Figure 3 shows a perspective view and a cross-sectional view showing the point of scale generation between the joint end of the rehabilitation tube and cured in place pipes (Cured in place pipes).

As shown in FIG. 3, the protection process is insufficient in the pipe end, and as time passes, tap water or the like penetrates between the pipe end and the end of the site hardening pipe, and scale (rust) is generated between the pipe end and the site hardening pipe. It can be seen that there is a case where the phenomenon of peeling occurs. The tube end is a concept including a joint end and a perforated branch for the sperm tube, air valve, Ito valve and the like. Figure 1b is a perspective view of the pipe end scale generation suppression string unit for an air valve according to an embodiment of the present invention, Figure 1c is a perspective view of the Ito valve pipe end scale generation suppression string unit according to an embodiment of the present invention. It is.

Therefore, the scale unit 200 according to the embodiment of the present invention is mounted to prevent the phenomenon that the site hardening pipe 100 and the tube end are separated from each other by the scale at the joint end 10 and the branch. .

Figure 4 shows a perspective view of the joint end and branch scale regeneration suppression string unit according to an embodiment of the present invention. 5 is a cross-sectional view of the joint end and branch scale regeneration suppression string unit according to an embodiment of the present invention.

In addition, Figure 6a is a cross-sectional view of a state in which the fast curing polyurethane resin is applied to the inner surface and the end surface of the field hardening pipe, the end surface and the outer surface of the existing pipe in accordance with an embodiment of the present invention, Figure 6b Figure 1 shows a cross-sectional view of a state in which the joint end and branch scale regeneration inhibiting string unit is mounted.

The string unit 200 according to the embodiment of the present invention is inserted into the impregnated tube inverted, and hardened the impregnated tube to reconstruct the conduit, so as to contact the tube end portion and the end of the field hardening tube 100 bonded to the tube end portion Combined.

As described above, the tube end corresponds to the joint end 10 or a branch perforated for at least one of a sperm tube, an air valve, and an earth valve.

In addition, as shown in Figure 6a and 6b, it can be seen that it includes an adhesive layer 20 is applied to the end of the tube and the adhesive surface of the string unit in contact with the field-curing tube (100).

And this adhesive layer 20 is made of a fast curing polyurethane resin.

In addition, as shown in Figures 4 and 5, the string unit 200 according to an embodiment of the present invention is inserted into the inner surface 141 of the end of the in-situ hardened pipe is bonded to the outer surface by the fast curing polyurethane resin 20 It is configured to include a flange portion 220 which is bonded to the insertion end 210, the tube end end surface (joint end portion 10) and the field hardening tube end surface 140 by the fast curing polyurethane resin 20 It can be seen. The string unit 200 may be made of SUS 316.

Therefore, after reversing the impregnating tube including the resin layer impregnated with polyurethane into the existing pipe (1), and hardening the impregnating tube by steam heat curing and natural curing, the pipe of the existing pipe (1) The string unit 200 according to the above-described embodiment of the present invention is coupled to the end and the end of the hardened tube 100 bonded to the end of the tube.

In addition, before bonding the string unit 200, the fast-curing polyurethane on the adhesive surface of the string unit 200, or the joint end portion 10, the field hardening tube end surface 140 and the field hardening tube end inner surface 141. Resin 20 is applied.

And in the step of coupling the string unit 200, the insertion end 210 of the string unit is inserted into the inner surface of the end of the hardening pipe 141, the outer surface of the insertion end is bonded by the fast curing polyurethane resin 20, the plan Branch 220 is coupled to the string unit 200 to be bonded to the joint end portion 10 and the end hardening tube end surface 140 by the fast curing polyurethane resin 20. In addition, the insertion end 210 can be adjusted in length according to the conditions of the site, the flange portion 220 is produced by 1mm less than the existing pipe thickness to prevent the insertion of the joint pipe joint connection when connecting the existing pipe after rehabilitation is completed. Do not.

Therefore, tap water penetrates into the joint end 10 and the branch side in the pipe rehabilitation method for reversing the field hardening tube 100 by the string unit according to an embodiment of the present invention, and scale is generated. ) And the phenomenon that peeling occurs between the existing pipe (1) can be prevented.

In addition, the above-described apparatus and method may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be selectively combined in whole or in part in each of the embodiments so that various modifications may be made. It may be configured.

1: existing tube
2: viewpoint
3: endpoint
10: joint end
20: adhesive layer
100: spot hardening hall
110: film layer
120: felt
130: resin layer
140: end section of the construction site
141: the inside of the end of the construction site
200: string unit
210: insertion end
220: flange

Claims (10)

In the string unit for preventing the phenomenon that the scale is peeled off between the pipe of the site curing pipe and the existing pipe,
After inserting the site hardening tube and hardening the field hardening tube to reconstruct the pipe, the pipe end portion is coupled to contact the end of the field hardening tube adhered to the pipe end portion,
The pipe end is a joint end or a branch perforated for at least one of the sperm tube, air valve, Ito valve,
An adhesive layer applied to an adhesive surface of the string unit in contact with the pipe end and the spot hardening tube;
The adhesive layer is composed of a fast curing polyurethane resin,
The string unit is inserted into an inner surface of the end of the field hardening tube, and an outer surface of the string unit is adhered to the inner end of the field hardening tube by the fast curing polyurethane resin. Joint end and branch scale generation suppression string unit, characterized in that it comprises a flange portion.
delete delete delete The method of claim 1,
The insertion end can be adjusted in length according to the conditions of the site, and the flange part is made of 1mm less than the existing pipe thickness, so that the joint ends and the joints can be inserted into the joint pipe when connecting the existing pipe after rehabilitation. Base scale generation suppression string unit.
The method of claim 5,
The string unit is a joint end and branch scale suppression generation string unit, characterized in that consisting of SUS 316.
The method of claim 1,
The field hardening tube is a joint end and branch scale suppression generation string generation unit, characterized in that the film layer and the felt and the resin layer is sequentially laminated from the outside.
In the pipeline rehabilitation method,
Inverting and inserting an impregnation tube including a resin layer impregnated with an existing tube;
Hardening the impregnating tube by steam heat curing and natural curing to produce an in situ hardening tube; And
Combining the string unit according to claim 1, 5 or 6 so as to be in contact with the tube end of the existing tube and the end of the field hardened tube adhered to the tube end. Pipe rehabilitation method using unit.
The method of claim 8,
Before joining the string units,
And applying a fast-curable polyurethane resin to the adhesive surface of the string unit or the pipe end and the end of the in-situ hardened tube.
The method of claim 9,
Coupling the string unit,
An insertion end of the string unit is inserted into an inner surface of the end of the field hardening tube, and an outer surface of the string unit is bonded by the fast curing polyurethane resin, and a flange part is attached to the end of the tube end and the end of the field hardening tube. A pipeline rehabilitation method using a string unit, characterized in that bonded by the.

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