KR101813879B1 - A Repairing Agent for Fixing a Crack of a Sewer Pipe and a Method for Repairing a Sewer Pipe Using the Same - Google Patents

Abstract

The present invention relates to an index repair agent for repairing a sewer pipe and a sewage pipe repair method using the same, and more particularly, to an index repair agent for a sewer pipe repair which is made into a gel by combining a crack generated in a sewer pipe buried in the underground, The present invention relates to a sewer pipe repair method. A method of repairing a sewage pipe includes preparing a subject and a curing agent to be injected into a repair point of an underground conduit; Moving the inflatable packer through the interior of the underground conduit to the repair point; Expanding the packer to adhere to the inner wall surface and disposing the nozzle at the maintenance point; Supplying a subject and a curing agent to different supply paths through a supply tube connected to the nozzle; And a step of curing the above-mentioned subject and a curing agent, wherein the index repairing agent for sewer pipe maintenance is poly (ethylene glycol) methacrylate having a non-urethane monomer as a main component and having a pH of 7.5 to 8.5, It becomes ammonium and sulfate (Ammonium Persulfate).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a repair agent for repairing a sewer pipe,

The present invention relates to an index repair agent for repairing a sewer pipe and a sewage pipe repair method using the same, and more particularly, to an index repair agent for a sewer pipe repair which is made into a gel by combining a crack generated in a sewer pipe buried in the underground, The present invention relates to a sewer pipe repair method.

In order to repair the sewer, the repair device is moved into the sewage pipe, and a cracking device such as a CC camera (Closed Circuit camera) may detect the crack and a repair agent including an exponent may be injected into the crack site. The filler may be composed of a base and a hardener and should be able to block the inflow of moisture from the outside while filling the crack. As the exponent zero, a water expansion index agent, a polyurethane exponent or a foam exponent agent which reacts with water to rapidly form an open cell foam may be used.

Prior art related to indexing agents or repair agents is Patent Registration No. 1148982. The prior art includes a primer layer attached to an inner surface of a sewer line; A rubberized asphalt layer formed on the lower side of the primer layer for exponentiation; A polypropylene woven fabric layer formed below the rubberized asphalt layer and woven so that the polypropylene is formed into fine fine lines so as to have an excellent adhesion with the rubberized asphalt layer and then the warp and weft cross each other; Wherein the rubberized asphalt layer is composed of 20 to 50 wt% of asphalt, 10 to 30 wt% of polyisobutylene rubber, 15 to 30 wt% of polyisobutylene rubber, Discloses an integrated sewer pipe repair agent for an index and reinforcement comprising 20 to 40 wt% of isoprene styrene synthetic rubber and 1 to 30 wt% of polybutene.

Patent Registration No. 0939002 discloses a gum-based exponent composition comprising an acrylic compound, a crosslinking agent, an ethanolamine compound, a hydrogen carbonate metal salt, a persulfate compound, an active silicate compound and water.

The exponential or repairing agent disclosed in the above-described prior art is disadvantageous in that it is difficult to apply to the repair of a sewer pipe containing sulfuric acid salt or metal salt and having difficulty in reacting with the gravel or buried underground having a gravel-like or similar component.

The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art 1: Patent Registration No. 1148982 (Dream Ang Co., Ltd., May 22, 2012 release) Integrated sewer pipe repair agent for reinforcement and reinforcement and repair method using the same Prior Art 2: Patent Registration No. 0939002 (Mac Technology, Inc., published Jan. 28, 2010)

An object of the present invention is to provide an index repair agent for sewage pipe maintenance which is applied to the repair of a sewer pipe to enable environmental friendliness and prevention of freezing while preventing volume expansion or contraction at the same time to improve repair stability and a sewage pipe repair method by the same will be.

According to a preferred embodiment of the present invention, a method for repairing a sewer pipe comprises: preparing a subject and a curing agent to be injected into a repair point of an underground conduit; Moving the inflatable packer through the interior of the underground conduit to the repair point; Expanding the packer to adhere to the inner wall surface and disposing the nozzle at the maintenance point; Supplying a subject and a curing agent to different supply paths through a supply tube connected to the nozzle; And subjecting the topical agent and the curing agent to curing. The subject of the index maintenance agent for sewage pipe maintenance is polyurethane (ethylene glycol) methacrylate having a pH of 7.5 to 8.5, which is a non-urethane monomer, This becomes ammonium and sulfate (Ammonium Persulfate).

According to another preferred embodiment of the present invention, in the step of supplying the hardener, triethanolamine for accelerating curing is added, or polyethylene or polyvinyl chloride is further added.

According to another preferred embodiment of the present invention, the water retention agent for repairing a sewer pipe comprising a base and a hardener for repairing an underground pipe is a non-urethane-based monomer and has a pH of 7.5 to 8.5 and a viscosity of 30 to 50 CP / ≪ / RTI > polyethylene glycol methacrylate; And a curing agent composed of ammonium and sulfate. The above-mentioned curing agent and the curing agent are supplied at a weight ratio of subject: curing agent = 1: 0.7 to 1.0 to form a gel state and cured.

INDUSTRIAL APPLICABILITY The index repairing agent according to the present invention does not exhibit toxicity and is made of a resin composition having environment friendliness, and thus has high resistance to external impact. In addition, since it is made into a gel form and hardened, it has a freezing stability and a small volume expansion. Further, the sewage pipe repair method according to the present invention is applied to the non-digging partial repair method, so that the construction is simple and the stability of the construction part is high. In particular, the repair method according to the present invention can be advantageously applied to a sewer unladen partial repair (UDRS) method.

Fig. 1 shows an embodiment of a sewage pipe repair method using an index repair agent according to the present invention.
FIG. 2A shows an embodiment of a packer applied to a maintenance method according to the present invention.
2B shows another embodiment of the packer applied to the repair method according to the present invention.
FIG. 3 shows an embodiment in which the repair index agent according to the present invention is in a gel form during the curing process.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

Fig. 1 shows an embodiment of a sewage pipe repair method using an index repair agent according to the present invention.

Referring to FIG. 1, the method for repairing a sewer pipe according to the present invention includes the steps of (P111, P112) preparing a subject and a curing agent to be injected into a repair point of an underground conduit; Moving the inflatable packer through the interior of the underground conduit to the repair point (P12); (P13) expanding the packer to adhere to the inner wall surface and disposing the nozzle at the maintenance point; Supplying a subject and a hardener to different supply paths through a supply tube connected to the nozzle (P14); And a step (P15) of curing the subject and the curing agent, wherein the subject is a polyurethane (ethylene glycol) methacrylate having a pH of 7.5 to 8.5, which is a non-urethane type monomer, It becomes ammonium and sulfate (Ammonium Persulfate).

For the application of the sewer pipe repair method according to the present invention, a robot having a closed circuit camera can be inserted into a sewer pipe through an inlet of a sewage pipe such as a manhole, and the robot can be moved with the packer. The sewer pipe repairing method according to the present invention can be applied to the repair of various underground pipe lines in which a repair device is inserted through a manhole buried underground.

For remediation, themes and hardeners may be prepared (P111, P112). The subject can be made in gel form in combination with the soil containing the sand surrounding the sewer, and then fully cured to prevent leakage of cracks. The curing agent is for fast curing of the subject, and a curing accelerator may be added during the supply if necessary.

The subject may be, for example, polyethylene glycol methacrylate. Polyethylene glycol methacrylate is a colorless liquid of a urethane monomer and is represented by CH ₂ ═C (CH ₃ ) CO (OCH ₂ CH ₂ ) _n OH (n is a positive integer, preferably 7 or 12) and has a specific gravity of 1.05 To 1.2 / 20 DEG C; Viscosity 48 CP / 20 DEG C; the pH can be 7.5 to 8.5. The hardening agent may be ammonium and sulfate and may be represented by (NH ₄ ) ₂ S ₂ O ₈ , white crystals having a specific gravity of 1.90 to 2.1, and grades used for food additives . The base and the curing agent may be dissolved or diluted in water, and the amount of the base and the curing agent may be in a ratio by weight of the base: curing agent = 1: 0.7 to 1.0. A hardening accelerator may be added to the subject if necessary. The curing accelerator may be, for example, TEA (Triethanolamine) used as a cosmetic raw material grade and can be represented by N (CH ₂ CH ₂ OH) ₈ and has a specific gravity of 1.01 to 1.10 / 20 ° C; Viscosity 10 to 15 CP / 20 < 0 >C; And a pH of 11 to 12.2. The curing accelerator may be added in an amount of 0.1 to 5.0 wt% based on the total weight of the subject. The supply tank for the supply of the base and curing agent may be disposed at the same location as the vehicle located outside the manhole. When the subject and hardener are ready (P111, P112), the packer can be moved to the repair point (P12).

The packer may have an inflatable structure by air injection, and a supply path may be formed therein. When the packer is moved to a position where repair of an underground conduit such as a sewer pipe is to be performed, the packer is inflated and the nozzle can be disposed at the repair point (P13). The outer circumferential surface of the packer can be brought into close contact with the inner surface of the underground conduit by the expansion of the packer and the exponent and the hardener can be injected through the injection nozzle arranged on the outer circumferential surface of the packer. In this state, the base and the curing agent can be injected into the repair point through the nozzle (P14). Depending on the state of the uniformity point, a curing accelerator may be added to the subject. For example, a hardening accelerator may be added if the temperature at the repair point is low, if the soil contains a large amount of water, or if the amount of sand is large. In addition, components such as polyethylene or polyvinyl chloride may be added to the subject or via a separate feed path. When the base and the hardener are injected outside the underground conduit, the base and the hardener may be cured in a gel form. And can be cured while surrounding the crack point and the outer surface. In this process, polyethylene or polyvinyl chloride can reduce the rate of volume change during the process of fully solidifying in gel form while improving the level of adhesion to underground conduits. A functional resin such as polyethylene or polyvinyl chloride may be added in an amount of 2 to 15 wt% of the total weight of the subject. The base and curing agent can be injected through independent supply tubes, respectively, and can be combined at the repair point. Alternatively, the base and curing agent may be fed through separate supply tubes and injected while being mixed by a single injection tube. Alternatively, the subject and the hardener may be injected with a time difference. For example, a certain amount of the subject may be injected, for example, after a certain period of 2 to 10 seconds, a certain amount of the curing agent may be injected. Thereafter, the base material is injected again, and the hardener is injected at a time difference. In this way, the subject and the hardener are repeatedly injected with time difference, and the subject is mixed with the soil and gradually becomes hardened (P15).

After 3 to 60 minutes from the introduction of the base and the curing agent, the base and the curing agent can be completely cured again in the form of a gel. Air may be removed from the packer after 10 to 30 minutes have elapsed since the introduction of the subject and hardener is completed, and the packer may be shrunk, and then the packer may be withdrawn again through the manhole (P16). And repair of the underground conduit can be completed.

An embodiment of a packer or supply tube is described below that applies to the repair method described above.

FIG. 2A shows an embodiment of a packer applied to a maintenance method according to the present invention.

Referring to FIG. 2A, the packer includes an expanding body 21 having a hollow cylindrical shape with elasticity; A balancing rim 212 in the form of a circular strip which retains the shape of the inflating body 21 in the process of inflating or deflating the inflating body 21; 1 and 2 sealing caps 22a and 22b provided on the front and rear portions of the expansion body 21; And an injection site SP disposed in the expansion body 21. The first and second supply tubes 24a and 24b supplied with the main and hardening agent through the sealing cap 22a may be connected to the inside of the packer and connected to the injection site SP. Also, an air inlet conduit 23 for injecting the feed into the packer may be disposed in one sealing cap 22a. A movement ring 213 for movement of the packer may be disposed in one sealing cap 22a or other suitable location. The packer can be moved by a mobile wheel installed at the bottom or moved by a mobile cart. The supply nozzle 27 may be disposed at the injection site SP and the main and curing agent may be introduced through the supply nozzle 27 to the maintenance point. As shown in FIG. 2A, the supply nozzle 27 may be made of a stretchable material such as, for example, silicone or rubber, and may be formed from a hollow cylindrical shaped induction body 271 and an induction body 271 And an extending feed tip 272. The feed tip 272 may have a shape in which one or two oblique planes 273a and 273b extending from the lower side of the cylindrical shape at different inclination angles meet and a boundary portion of the oblique planes 273a and 273b An injection gap 274 can be formed. The injection gap 274 can be made in such a structure that the end portion of the two inclined plane 273b having a small inclination angle covers the end portion of the one inclined plane 273a having a large inclination angle, It can be injected by injection pressure while being prevented. The supply nozzle 27 can be made in various structures and the present invention is not limited to the embodiments shown.

2B shows another embodiment of the packer applied to the repair method according to the present invention.

Referring to FIG. 2b, one or two supply tubes 24a, 24b extending into the interior of the expander body 21 of the packer may be connected to one injection conduit 25. The first and second supply tubes 24a and 24b may be extended by the tube connector 241 and 242 to the tube fixing unit 28 formed in the interior of the expansion body 21. And one end of the injection conduit 25 may be connected to the tube fixing unit 28 and the other end may extend to the maintenance point RP. The ends of the first and second supply tubes 24a and 24b may extend into the interior of the injection conduit 25 and the tube fixation unit 28 may be constructed in a closed structure with the expansion body 21. [ The expansion contact unit 26 may be disposed at the other end of the injection conduit 25 and the expansion contact unit 26 may be made of a material such as silicone or PDMS (poly dimethylsiloxane) having elasticity, (Not shown). The subject and the curing agent may be supplied through the first and second supply tubes 24a and 24b, respectively, and mixed in the injection conduit 25 to enter the maintenance point RP. If necessary, the inner surface of the injection conduit 25 may be formed into a threaded structure, whereby the main body and the hardening agent may be mixed and injected into the maintenance point RP.

When the subject and hardener are injected into the maintenance point (RP), they can first be made into a gel form with soil or sand and then gradually cured to a solid with elasticity or elasticity.

FIG. 3 shows an embodiment in which the repair index agent according to the present invention is in a gel form during the curing process.

The subject and the curing agent may be cured in gel form at a time of 3 to 30 minutes after mixing. The subject matter and the curing agent according to the present invention were mixed in a weight ratio of 1: 1 to prepare a gel, and physical properties thereof were measured. The physical properties are as follows: compressive strength (KS L 5105: 2007), presence of hazardous substances (waste process test standard: 2011), presence of cracks in melting cracks (KS M ISO 2812-1: 2007), coefficient of expansion (KS F 2478: 2004) (KS M ISO 2812-1: 2007).

The compressive strengths were 0.60 to 0.68 N / mm < 2 > and 0.85 to 0.99 N / mm < 2 > for the resin gel and the sand gel, respectively. For the resin gel, the compressive strength was gradually increased from 0.5 to 0.75 N / mm < 2 > with 1 to 28 days, and increased from 0.75 to 0.99 N / mm < 2 > There was no change in compressive strength after 28 days.

As a result of the test of harmful substances, Pb, Cu, As, Hg, CN-, Cr (VI), Cd, organic phosphorus, tetrachlorethylene (PCE) and trichlorethylene (TCE) were not detected and 0.01% Respectively.

The immersion test was carried out at 15 ± 1 ° C for 16 h and 20 ± 1 ° C for 4 h and immersion in water for 8 h. No dissolution, cracking or breakage was found in the immersion test for 3 months in 5% lactic acid and 5% saline solution .

The volume expansion rate was changed from 0.73 to 0.80% at 1 to 28 days, and no deaths were observed for 2000 mg / kg body weight in the oral toxicity test (Korea Food & Drug Administration Notice No. 2009-116).

From these test results, it can be seen that the index repairing agent according to the present invention and the repairing method therefor are suitable for maintenance in the sewerage system.

INDUSTRIAL APPLICABILITY The index repairing agent according to the present invention does not exhibit toxicity and is made of a resin composition having environment friendliness, and thus has high resistance to external impact. In addition, since it is made into a gel form and hardened, it has a freezing stability and a small volume expansion. Further, the sewage pipe repair method according to the present invention is applied to the non-digging partial repair method, so that the construction is simple and the stability of the construction part is high. In particular, the repair method according to the present invention can be advantageously applied to a sewer unladen partial repair (UDRS) method.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

21: Expansion body 22a: 1 sealing cap
22b: 2 sealing cap 23: air inlet conduit
24a: 1 supply tube 24b: 2 supply tube
25: injection conduit 26: stretch contact unit
27: supply nozzle 28: tube fixing unit
212: Balance frame 213: Movement ring
241: 1 tube connector 242: 2 tube connector
271: Induction body 272: Feed tip
273a: 1 inclined plane 273b: 2 inclined plane
274: injection gap RP: maintenance point
SP: injection site

Claims (1)

In the sewage pipe repair method,
Preparing a subject and a curing agent to be injected into a repair point of the underground conduit;
Moving the inflatable packer through the interior of the underground conduit to the repair point;
Expanding the packer to adhere to the inner wall surface and disposing the supply nozzle (27) at the maintenance point;
Supplying the top and the hardener through different supply paths through one or two supply tubes 24a, 24b connected to the supply nozzle 27; And
Curing the subject and the curing agent in gel form for 3 to 30 minutes,
The supply tubes 24a and 24b are formed in the expander body 21 of the packer and have a tube fixing unit 28 formed in a closed structure with the expanding body 21 and a tube fixing unit 28 having one end connected to the tube fixing unit 28 Extending into the connecting injection conduit (25), a stretchable contact unit (26) of a stretchable material is disposed at the end of the injection conduit (25)
The subject and the curing agent may be poly (ethylene glycol) methacrylate having a pH of 7.5 to 8.5 and ammonium and sulfate. Ammonium persulfate may be used as the base and the hardener may be a functional resin containing polyethylene or polyvinyl chloride Wherein the repairing agent is added to the repairing agent.

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