KR20160137341A - Ambient temperature curing tube for pipe repairing and pipe repairing method using the same - Google Patents

Abstract

The present invention relates to a non-excavation type pipe repairing method and an ambient temperature curing tube for repairing a pipe, wherein an ambient temperature curing tube for repairing a pipe is inserted into the inside of a pipe, and after expanding the tube for repairing a pipe, the tube for repairing a pipe is ambient temperature cured. More specifically, the present invention relates to the ambient temperature curing tube for repairing a pipe, which is formed by felt into which a mixing liquid having a polymer resin such as an epoxy resin, an unsaturated polyester resin, or the like and a hardening agent is immersed, and relates to a non-excavation type pipe repairing method.

Description

Technical Field [0001] The present invention relates to a pipe for repairing a room temperature curing water,

The present invention relates to a room temperature curable water supply and drainage maintenance and repair tube and a method of repairing and repairing the same by using the room temperature curable water supply maintenance and repair tube and a method of repairing and repairing the water supply pipe regardless of the amount of sewage flowing into the inside of the pipe. The present invention relates to a non-digging type pipe repair method capable of reinforcing a pipe.

Generally, a conduit is a structure that is buried underground as a pipe for moving drinking water, domestic water or rainwater or domestic sewage. Such conduits are buried for a long time, and cracks are generated when they are aged. As a result, cracks are generated in the joints connecting the pipes, and dirt is deposited due to the settlement, thereby interfering with the flow of the sewage. Therefore, the old pipe is excavated and the piping is repaired by using the method of replacing the entire pipe or by the un-excavation method.

In the case of replacing the whole piping by excavating the piping, it is difficult to excavate the piping and it takes a lot of cost. Therefore, there is a problem in that a reinforcing member is inserted into the old piping and the piping is tightly fixed to the inner wall of the old piping Maintenance methods are mainly used. This unrefractured maintenance method is generally used for repairing conduits having a small diameter of 200 to 1,500 mm. It is generally more economical to excavate a new pipe when the diameter of the pipe to be repaired is less than 200 mm, and it is more economical to directly access and repair the pipe when the pipe has a diameter of 1,500 mm or more.

Reinforcing tube which is impregnated with a thermosetting resin is disposed inside a tube to be repaired and then a hot hot air is blown into the inside of the tube, And at the same time curing the tube.

For example, Korean Patent Laid-Open Publication No. 10-2013-0141281 discloses a method of repairing pipes by being lined in various conduits (water pipes, sewer pipes, gas pipes, oil pipelines, etc.) and to prevent cracks, Although known for improved ducted maintenance reinforcement tubes, there is still a need for a device such as a separate hot air heater as a thermoset repair augmentation tube.

Korean Patent No. 10-1339748 also discloses a method of preventing cracks from occurring in a conduit and preventing the diffusion of existing cracks to prevent leakage of water / sewage flowing along the inside of the conduit and prevention of penetration of groundwater. There is a problem in that a fiber tube and a manufacturing method thereof are known, but also a device such as a separate heat fan is required as a thermosetting repair and reinforcement tube.

Therefore, in order to cure the repair reinforcement tube, a device capable of maintaining a high temperature state such as a hot air blower is required, and not only inefficient process efficiency such as paralysis due to an increase in area of the process equipment on the ground, but also a long time, There is also a problem in that the working time, such as working at night or at dawn, is also limited.

Korean Patent Publication No. 10-2013-0141281 Korean Patent No. 10-1339748

It is an object of the present invention to provide a room temperature curable pipe maintenance reinforcing tube which can be cured at a room temperature after a certain time without a separate heat generating device.

Another object of the present invention is to provide a room temperature curable pipe maintenance / reinforcement tube which can be cured at a room temperature for a certain period of time even in a state where it can be immersed in water such as water / sewage.

Another object of the present invention is to provide a room temperature curable pipe maintenance reinforcing tube having a hardness of at least a certain level even in water deposition and room temperature curing.

It is still another object of the present invention to provide a non-drilled pipe repair method using the room temperature curable pipe maintenance pipe. The present invention provides a non-digging type pipe repair method capable of maintaining the uncured state before construction and adjusting the hardening delay time of the repair and strengthening tube so that the hardening can proceed after completion of construction.

It is still another object of the present invention to provide a non-drilled pipe repair method that can quickly withdraw equipment installed on the ground before completion of curing by using the room temperature curable pipe maintenance reinforcing tube.

The present invention solves the disadvantages of conventional thermosetting repair and reinforcement tubes that require a separate heat generating device. The present invention includes a polymer resin and a curing agent comprising at least one selected from an epoxy resin and an unsaturated polyester resin A non-woven fabric impregnated with a mixed solution containing the polymer resin, a curing agent, and a curing retardant; and a non-woven fabric that is cured at room temperature after the maintenance and reinforcement tube is inflated, It is possible to provide a method of maintenance of the food service station. Therefore, since it is not necessary to cure using a device such as a separate hot air till the curing is completed, various facilities installed on the ground before the curing can be removed in advance, Can be shortened.

In general, conventionally, by using a thermosetting resin and a curing accelerator which hardly progress in curing, a repair and reinforcement tube adjusted in the direction of decreasing the hardening delay time is used. However, the repair and reinforcement tube of the present invention is a high- A resin and a curing agent are applied, or the polymer resin, the curing agent and the curing retardant are applied, thereby adjusting the direction of increasing the curing delay time.

Further, in the case of conventional thermosetting repair and maintenance tube, there is an advantage that curing can be performed well even in a water immersion state by a heat generating device. However, when a separate heat generating device is not used, not only the curing itself progresses, There is also a problem of deterioration of physical properties due to water deposition.

However, the room temperature curable pipe maintenance reinforcing tube of the present invention has an effect of being able to be cured with physical properties of a certain hardness or more, which can be used even in a water immersion state, although a separate heat generating device is not used.

The present invention also relates to a method for adjusting the cure delay time of a room temperature curable pipe maintenance tube by adjusting the content ratio of the polymer resin, the curing agent and the curing retarder, the temperature and the impregnation rate (impregnation rate of the mixed solution impregnated in the nonwoven fabric) Provide a method of maintenance of the vessel.

The present invention relates to a non-digging type pipe maintenance method for introducing a room temperature curable pipe maintenance reinforcing tube into a pipe, expanding the pipe, and then curing the pipe at room temperature, and to the room temperature curable pipe maintenance pipe.

In one example of the present invention, the room temperature curable pipe maintenance reinforcing tube may be made of a nonwoven fabric impregnated with a mixed solution containing a polymer resin and a curing agent.

In one embodiment of the present invention, the mixed solution is not limited to achieve the object of the present invention, but may include, for example, 0.01 to 5 parts by weight of the curing agent based on 100 parts by weight of the polymer resin.

In one embodiment of the present invention, the mixed liquid is not limited to achieve the object of the present invention, but may include, for example, 0.01 to 5 parts by weight of a hardening retarder.

In one example of the present invention, the impregnation rate of the mixed solution impregnated in the nonwoven fabric is not limited to achieve the object of the present invention, but may be, for example, 5 to 70%.

In one example of the present invention, the repair and reinforcement tube is not limited to achieve the object of the present invention, but may be an uncured maintenance duration of 2 to 35 hours, for example, at 10 to 35 ° C.

In one example of the present invention, the repair and reinforcement tube is not limited to achieve the object of the present invention, but may include a body made of, for example, a nonwoven fabric and a waterproof layer formed on the inner circumferential surface of the body.

In one embodiment of the present invention, the repair method of the present invention is not limited as long as the purpose of the present invention is achieved. For example, a repair reinforcement tube in which an outer surface of a water turning tube is inserted into an inner surface of a repair reinforcement tube, And then the water / sewage is flowed into the water circulation tube to expand the repair / reinforcement tube to be repaired.

The room temperature curable pipe maintenance reinforcing tube of the present invention has an advantage that it can be cured at a room temperature without a separate heat generating device by controlling the composition of a polymer resin such as an epoxy resin or an unsaturated polyester resin used for manufacturing tubes.

The room temperature curable pipe maintenance and reinforcement tube of the present invention is advantageous in that it can be cured after a certain period of time at room temperature even in a state where it can be immersed in water such as water and sewage.

The room temperature curable pipe maintenance reinforcing tube of the present invention has an advantage that it has a hardness higher than a certain level even in water deposition and room temperature curing.

The method of repairing pipes using a room temperature curable pipe maintenance and repairing tube of the present invention is characterized by using the room temperature curable pipe maintenance reinforcing tube to control the composition, component ratio, temperature impregnation rate, By controlling the time and completion time of curing in construction, it is possible to repair the conduits even in a water immersion state without a separate heat generating device.

The pipe repair method using the room temperature curable pipe maintenance reinforcing tube of the present invention can remove the facilities installed on the ground more quickly after completion of the curing after the maintenance and reinforcement tube is constructed by using the room temperature curable pipe maintenance reinforcing tube, There is an advantage that the problem according to the core material can be minimized.

Fig. 1 is a graph showing the uncured holding time (time) of the nonwoven fabric according to the content of the curing agent (parts by weight, 100 parts by weight of the unsaturated polyester resin) according to Example 1. Fig.

Hereinafter, a room temperature curable water supply and drainage tube maintenance and repair tube and a tube maintenance and repair method using the same will be described in detail with reference to the accompanying drawings.

Where a drawing is described, it is provided as an example to enable those skilled in the art to fully understand the spirit of the invention. Therefore, the present invention is not limited to the illustrated drawings, but may be embodied in other forms, and the drawings may be exaggerated in order to clarify the spirit of the present invention.

Hereinafter, the technical and scientific terms used herein will be understood by those skilled in the art without departing from the scope of the present invention. Descriptions of known functions and configurations that may be unnecessarily blurred are omitted.

Unless otherwise stated in the present specification, the unit of% used means weight.

As used herein, the term " hardening delay time (or uncured retention time) " means the time until the uncured maintenance reinforcement tube is cured. That is, it means a period of time that elapses before the hardening of the nonwoven fabric (or the repair-reinforcing tube made of the nonwoven fabric) impregnated with the mixed solution of the polymer resin (the subject) and the hardener is progressed.

As used herein, the term " water / sewage " refers to a mixed liquid or solid / liquid / gas flowing in a conduit such as a constant, sewage, wastewater, sewage, stormwater, wastewater, ground water, gas, oil, , And preferably means a constant or an odor. But may also include mixtures of various components that may flow or flow within the conduit, such as, but not limited to.

Also, the term repair reinforcement as used herein may mean repair, reinforcement, or both repair and reinforcement.

The present invention solves the disadvantages of conventional thermosetting repair and reinforcement tubes that require a separate heat generating device. The present invention includes a polymer resin and a curing agent comprising at least one selected from an epoxy resin and an unsaturated polyester resin A non-woven fabric impregnated with a mixed solution containing the polymer resin, a curing agent, and a curing retardant; and a non-woven fabric that is cured at room temperature after the maintenance and reinforcement tube is inflated, It is possible to provide a method of maintenance of the food service station. Therefore, since it is not necessary to cure by using a device such as a separate hot air till the curing is completed, a large number of facilities installed on the ground before the curing can be removed in advance, Can be greatly shortened.

In general, by using a thermosetting resin and a curing accelerator, which are hardly cured in the past, a repair and reinforcement tube adjusted to reduce the curing delay time was used. However, the repair and reinforcement tube of the present invention is a repair and reinforcement tube adjusted to increase the curing delay time by applying a polymer resin and a curing agent which are cured at room temperature, or by applying a polymer resin, a curing agent and a curing retardant.

Further, in the case of a conventional thermosetting repair and maintenance tube, water can be cured by heat even in a water immersion state by the heat generating apparatus, but if a separate heat generating apparatus is not used, the curing itself does not proceed, There arises a problem of deterioration of physical properties (for example, decrease in hardness) due to water immersion even when cured. Explaining the above water deposition, the inside / outside environment of the conduit buried in the basement is not only high in humidity but also prevented from flowing out (or leaking) from a gap in the ceiling or the like, And water is always accompanied by water. Therefore, even in an environment where the outer surface of the repair and reinforcement tube without a waterproof layer can be in direct contact with water, the hardness must be above a certain level when the hardening is completed. However, There arises a problem that the temperature is lowered.

However, the room temperature curable pipe maintenance reinforcing tube of the present invention has an effect of being able to be cured at a hardness of at least a certain level which can be used even in a water immersion state without using a separate heat generating device.

The present invention also relates to a method for adjusting the cure delay time of a room temperature curable pipe maintenance tube by adjusting the content ratio of the polymer resin, the curing agent and the curing retarder, the temperature and the impregnation rate (impregnation rate of the mixed solution impregnated in the nonwoven fabric) Provide a method of maintenance of the vessel.

In one example of the present invention, the room temperature curable pipe maintenance reinforcing tube made of a nonwoven fabric impregnated with a mixed solution (a room temperature curable mixed solution) containing a polymer resin and a curing agent is cured after a lapse of a predetermined time. As factors affecting the curing, examples of the type of the mixed liquid component, the content ratio of the components, the environment (temperature, water immersion, etc.), and the like, can be cited as examples of the curing delay time or curing time Can be controlled.

The hardening delay time is a very important factor. Due to the room temperature hardening property, the uncured state should be continuously maintained so that hardening does not proceed during the period before and after the maintenance work. Therefore, it is the first of the objects of the present invention to provide a room temperature curing repair and strengthening tube precisely adjusted so as to have an uncured holding time suitable for each situation. Therefore, even if it is not adjusted to the external environment variables such as keeping the curing delay time for adjusting the curing delay time, it is necessary to prepare a maintenance reinforcing tube at an appropriate content ratio suitable for each temperature, for example, Or can be minimized. As a non-limiting example, a pre-maintenance reinforcement tube can be manufactured and stored to have an uncured maintenance time suitable for ambient temperature (such as seasonal average temperature), and can be easily applied.

Hereinafter, the present invention will be described in detail.

The present invention relates to a non-digging type pipe repair method for introducing a room temperature curable pipe maintenance reinforcing tube into a pipe, expanding the repair pipe and curing the pipe at room temperature, and a room temperature curable pipe maintenance and strengthening pipe, May be made of a nonwoven fabric impregnated with a polymer resin and a curing agent containing at least one selected from an epoxy resin and an unsaturated polyester resin or a mixed solution containing the polymer resin, the curing agent and the curing retarder.

In the example of the present invention, the polymer resin is not limited to attain the object of the present invention, but it is preferable that the polymer resin is an unsaturated polyester resin, for example, at room temperature curing, the content ratio of each component, the impregnation ratio (impregnation of the mixed solution impregnated in the non- And the like, and the curing delay time can be easily controlled in accordance with environmental variables such as temperature and degree of immersion of the humidity.

In one embodiment of the present invention, the mixed solution is not limited to achieve the object of the present invention, but may include, for example, 0.01 to 5 parts by weight of the curing agent based on 100 parts by weight of the polymer resin. When the composition ratio is satisfied, it is possible to prevent a problem that the curing time is too long during the application, the curing is not progressed properly, and the curing is completed with a property of low hardness lower than a certain level. In order to prevent the phenomenon that the hardness is significantly lowered upon completion of curing, it is preferable that the amount is 0.6 parts by weight or more. In order to control the delay time, it is more preferable that the slope is 0.8 part by weight or more Can be efficient. However, this is a preferable example, but the present invention is not limited thereto.

In one embodiment of the present invention, the mixed solution is not limited to achieve the object of the present invention, but it may include 0.01 to 5 parts by weight, preferably 0.1 to 1.2 parts by weight, of the curing retarder based on 100 parts by weight of the polymer resin . When the composition ratio is satisfied, it is possible to prevent the curing time from being excessively delayed or the curing to be difficult to proceed and the curing to be completed with less low hardness properties. Also, when the content of the hardening retarder is 0.5 parts by weight or more, the uncured holding time can be remarkably increased to control the delay time more effectively. If the content of the hardening retarder is 0.6 parts by weight or more, heat generation can be prevented. However, this is a preferable example, but the present invention is not limited thereto.

In one example of the present invention, the hardening delay time is an important factor, and the uncured state of the repair and reinforcement tube must be continuously maintained so that curing does not proceed during the time between before and after the application. Therefore, when the composition ratio is controlled within the above range, it is possible to manufacture the repair and reinforcement tube with more precise control of the curing delay time.

In one embodiment of the present invention, the unsaturated polyester resin is not limited to attain the object of the present invention, but may include a polybasic acid and a polyhydric alcohol including at least one selected from unsaturated polybasic acids and saturated polybasic acids. However, this is a preferable example, but the present invention is not limited thereto.

In one embodiment of the present invention, the unsaturated polybasic acid is not limited to attain the object of the present invention, but may include any one or more selected from maleic anhydride, fumaric acid, derivatives thereof, and the like. However, this is a preferable example, but the present invention is not limited thereto.

In one embodiment of the present invention, the saturated polybasic acid is not limited to attain the object of the present invention, and includes, for example, any one or two or more selected from phthalic anhydride, isophthalic acid, terephthalic acid, anhydrous hic acid and derivatives thereof . However, this is a preferable example, but the present invention is not limited thereto.

In one embodiment of the present invention, the polyhydric alcohol is not limited to attain the object of the present invention, and examples thereof include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, neopentyl glycol, bisphenol- And may include any one or two or more selected. However, this is a preferable example, but the present invention is not limited thereto.

In one example of the present invention, the polymer resin comprising an epoxy resin or an unsaturated polyester resin may further include a styrene monomer. When the styrene monomer is further included, the hardness can be improved more than that after completion of curing.

In one embodiment of the present invention, the polymer resin may further include a plasticizer.

In one example of the present invention, the curing agent is not particularly limited as long as the object of the present invention is achieved. Examples of the curing agent include methyl ethyl ketone peroxide, dicumyl peroxide, benzoyl peroxide, dibenzoyl peroxide, 2,5- (Tert-butylperoxy) hexane, t-butyl perbenzoate, 2,5-dimethyl-2,5-di (t- (2-tert-butylperoxyisopropyl) benzene, and derivatives thereof, and the like, and the like. can do. Preferably, the use of methylethylketoneperoxide may facilitate control of the curing delay time at room temperature. However, this is a preferable example, but the present invention is not limited thereto.

In one embodiment of the present invention, the curing retarder is not limited to attain the object of the present invention, and for example, any one selected from catechol curing retardants including p-tert-butyl catechol, benzoquinone and hydroquinone, A quinone-based curing retarder and derivatives thereof, and the like. Preferably, the use of a catechol curing retarder, more preferably p-tert-butyl catechol, may facilitate control of the cure delay time at room temperature.

In one embodiment of the present invention, the unsaturated polyester resin is not limited to attain the object of the present invention. For example, the unsaturated polyester resin may contain 1 to 10 wt% of phthalic anhydride, 10 to 30 wt% of terephthalic acid, 5 to 15 wt% of an acid anhydride, 1 to 10 wt% of ethylene glycol, 5 to 15 wt% of diethylene glycol, 1 to 10 wt% of propylene glycol, 5 to 15 wt% of dipropylene glycol, and 0.1 to 15 wt% . However, this is a preferable example, but the present invention is not limited thereto.

In one example of the present invention, the impregnation rate of the mixed solution impregnated in the nonwoven fabric is not limited to achieve the object of the present invention, but may be, for example, 5 to 70%, preferably 5 to 50%. When the rate of the impregnation is satisfied, the hardening delay time of the repair and strengthening tube can be more easily controlled, and the hardness can be further improved upon curing. The percent impregnation (%) is defined as (total weight of impregnated mixed liquid / nonwoven fabric) x 100.

In one example of the present invention, it is a second object of the present invention to provide a room temperature curing repair reinforcing tube having a certain level of physical properties even in a hardly hardened environment such as a water immersion state. Generally, in a water immersion state, a styrene monomer or other components may be eluted by water and hardness may be lowered upon completion of curing. However, the repair and reinforcement tube of the present invention can not only control the curing time, The phenomenon that the hardness is lowered can be minimized.

In one example of the present invention, the repair or reinforcement tube made of the nonwoven fabric or the nonwoven fabric is not limited to attain the object of the present invention, but may have a Shore hardness (D) of 45 or more, preferably 50 or more. The upper limit of the Shore hardness (D) is not limited, but may be, for example, 45 to 70 as a practical example. In general, a Shore hardness (D) of 45 or more can have a physical property suitable to the standard of pipe maintenance (Shore hardness: Shore D type as measured by Barcol durometer according to ASTM D2583)

In one example of the present invention, the temperature is another control factor for control of the cure delay time outside the component content ratio, and is not limited to achieve the object of the present invention. For example, 10 to 35 DEG C, preferably 10 to 25 DEG C Lt; / RTI > As the temperature increases, the hardening delay time tends to decrease. It is possible to manufacture a maintenance and reinforcement tube having an uncured maintenance time by adjusting the content ratio of the polymer resin, the hardener, the curing retardant and the like, and secondly, the temperature (storage temperature) of the repair and reinforcement tube is adjusted , It is possible to appropriately reduce or increase the non-cured holding time from a situation in which sudden change can occur. The repair and strengthening tube manufactured within the above temperature range may have higher hardness properties after the application (or after the completion of curing). However, this is a preferable example, but the present invention is not limited thereto.

In one example of the present invention, the room temperature curable pipe maintenance reinforcing tube is not limited so long as the object of the present invention is achieved. For example, the uncured holding duration at 10 to 35 DEG C may be 2 to 35 hours. A specific example may be 15 to 35 hours at 8 to 12 占 폚, 5 to 12 hours at 13 to 17 占 폚, 2.5 to 7.5 hours at 22 to 28 占 폚 and 2 to 4.5 hours at 32 to 38 占 폚.

As a non-limiting example, complete curing can be completed completely after more than 24 hours have elapsed and can have a Shore hardness (D) 58 or greater. As described above, the cure delay time (or the uncured maintenance duration) of the final repair and reinforcement tube can be adjusted depending on the temperature, the kind of the component, the content of the component, the thickness of the nonwoven fabric and the impregnation rate of the nonwoven fabric.

In one example of the present invention, the repair and reinforcement tube is not limited to attain the object of the present invention, but may include, for example, a body made of the nonwoven fabric and a waterproof layer formed on the inner peripheral surface of the body. In addition, metal or non-metallic materials may be further included. As a non-limiting example, the nonwoven fabric itself having a waterproof layer formed on one side of the nonwoven fabric may be used.

In one example of the present invention, the nonwoven fabric is not limited to achieve the object of the present invention, and examples thereof include polyethylene, polypropylene, polyethylene oxide, polyethylene terephthalate, polysulfone, polyisothiamide, polyvinylidene fluoride, Ronitril, and mixtures thereof, and the like. In addition, glass fiber, carbon fiber, aramid fiber, biomed cellulose fiber, bio-nanofiber, and the like can be used, and it is not limited as long as the mixed solution containing the polymer resin can be impregnated.

In one embodiment of the present invention, the waterproof layer is formed on the inner circumferential surface of the repair and reinforcement tube so as to prevent the fluid flowing therein from leaking. The layer is not limited as long as it is formed of a waterproof material. Examples thereof include polyethylene, Urethanes, polyesters, polyacrylics, derivatives thereof, and the like (including blending or lamination). Any other waterproof material can be used without limitation.

The method of repairing the pipeline according to the present invention is not limited to the purpose of achieving the object of the present invention. For example, a method of repairing the pipeline by inflating the repair / reinforcement tube by injecting a liquid such as upper / . For this purpose, the pressure control system and apparatus using a packer for upper / lower water piping can be directly applied to the inside or outside of the pipeline, not to the ground. For example, a packer for sealing the inlet or outlet of the pipeline into which the maintenance- For example. Specifically, it is provided at the inlet or outlet and is located outside the maintenance-reinforcement tube of the inlet body or outlet body and the inlet or outlet for sealing the inlet or outlet, and the inlet body or the outlet body is connected to the maintenance- Or a stationary ring formed to be fixed to the conduit.

It is possible to control the pressure of the maintenance and reinforcement tube by using the above-mentioned water / sewage pipe reinforcement packer, to measure the pressure inside the pipe, to control the inflow of air or liquid so that the pressure inside the pipe is constant, It is possible to control the discharge of the liquid or gas in the conduit.

Therefore, it is possible to eliminate the troubles caused by the expansion of the maintenance and reinforcement tube due to the inflow of air by a device such as a hot air fan, the problem of adjusting the curing time of the repair and reinforcement tube, and the troublesome installation of external piping due to external water turning, In the case of roadside, the problem of traffic congestion caused by various devices installed on the ground is solved. At the same time, the local control unit located around the manhole and the packer with the automatic control and pressure measurement function and the automatic control by the main control unit connected to it Is possible.

In one embodiment of the present invention, the repair method of the present invention is not limited as long as the purpose of the present invention is achieved. For example, a repair reinforcement tube in which an outer surface of a water turning tube is inserted into an inner surface of a repair reinforcement tube, And then the water / sewage is flowed into the water circulation tube to expand the repair / reinforcement tube to be repaired.

In the conventional non-excavation repair method, since the water turning tube is bypassed to the ground, the maintenance reinforcement tube is cured by using the air pressure to repair the duct. However, in the case of using such a method, various large devices such as a mid-stage device, a blower, and a hot air blower are required to inject air. In addition to the noise generated by the above devices, , There is a problem that traffic is stagnant by various devices installed on the ground. On the other hand, according to the present invention, it is possible to drastically reduce the size of the facility on the ground by passing the water turning tube directly to the inside of the pipe without bypassing the water turning tube to the ground by using the water turning non-digging pipe maintenance method using the room temperature hardening pipe maintenance reinforcing tube. In addition, since the room temperature curing repair and strengthening tube can be inflated and brought into close contact with the inner circumferential surface of the tube by expanding the water circulating tube, various large devices such as a mid-stage device, a blower,

In addition, since it is possible to repair the water after the water is turned to the outside, it is impossible to repair the medium or large sized water. However, the repair method of the water turning pipe using the room temperature curable pipe maintenance reinforcement tube of the present invention can also repair the medium and large pipes.

As described above, since the curing can be performed at room temperature, the curing time can be shortened. Even if the conduit is buried in a road with many passages, the construction can be completed within a short time, Can be minimized.

Hereinafter, a method of repairing a water turning ungurended pipe using the room temperature curable pipe maintenance reinforcing tube of the present invention will be described in detail as an example.

In one embodiment of the present invention, the water-swept unguipulated pipe repair method using the room temperature-hardenable pipe maintenance reinforcement tube comprises:

Sewage opening / closing means installing step (S10) for opening / closing means for blocking the discharge of sewage / sewage from the piping,

(S20) for closing the opening / closing means so that the water / sewage does not flow inside the conduit,

A cleaning step (S30) of cleaning the inside of the conduit before repairing the conduit,

A step (S40) of injecting the repair reinforcement tube in the form of inserting the outer surface of the water turning tube into the inner surface of the repair reinforcement tube so that the water / sewage can flow into the pipe during maintenance of the pipe,

A repairing and reinforcing tube opening step (S50) for opening both ends of the repairing and reinforcing tube after putting the water turning tube and the repairing and reinforcing tube into the inside of the conduit,

A water circulation tube connecting step (S60) for opening both ends of the water circulation tube inserted into the interior of the repair and strengthening tube from both ends of the opened maintenance and repair tube and connected to the opening and closing means,

A water / sewage flow step (S70) for controlling the top / bottom water to flow into the water turning tube and

(S80) of expanding the repair-enhancing tube and coming into close contact with the inner circumferential surface of the conduit,

And the like.

In one embodiment of the present invention, the opening / closing means installing step (S10) is a step of providing opening / closing means capable of introducing or blocking the upper / lower water into the conduit on both manholes of the conduit. The opening / closing means is formed in a hollow shape having a size corresponding to the striking direction of the conduit, and is formed to be openable and closable using a control valve or the like. The conduit includes an inlet portion into which the upper / lower water flows into the conduit from the manhole, and a discharge portion into which the upper / lower water flows into the manhole from the conduit. In the water turning construction method of the present invention, The opening and closing means is installed in the outlet portion of the upstream side conduit and the inlet portion of the downstream side conduit.

In one embodiment of the present invention, the flow stopping step S20 is a step of closing the opening / closing means so as to prevent the top / bottom water from flowing into the conduit.

In an example of the present invention, the cleaning step S30 is a step of cleaning the inner wall of the conduit so that the maintenance reinforcing tube formed for the maintenance of the conduit can be more easily attached to the inner wall of the conduit.

In one embodiment of the present invention, the tube insertion step (S40) is a step in which the repair and reinforcement tube in which the outer surface of the water turning tube is inserted into the inner surface is inserted into the conduit in which the water / sewage does not flow.

In one embodiment of the present invention, the opening of the repair and reinforcement tube (S50) is a step of opening both end portions of the repair and reinforcement tube inserted into the conduit.

In an embodiment of the present invention, the water circulation tube connection step (S60) is a step of extending both ends of the water circulation tube in a folded state inside the maintenance and reinforcement tube to connect with the opening and closing means.

In an exemplary embodiment of the present invention, the upper / lower water flow step S70 may be controlled such that the upper / lower water flows into the water turning tube such that the upper / lower water flows through the water turning tube .

In one example of the present invention, the water turning tube expanding step (S80) is performed so that the water / sewage introduced into the water turning tube by the above-mentioned water / sewage flowing step (S70) inflates the water turning tube. At this time, the opening / closing means provided on the upstream side of the conduit is opened and the opening / closing means provided on the downstream side is closed, so that the water turning tube can be easily expanded.

As a specific example, the maintenance and reinforcement tube adhering step (S80) may refer to a step of inflating the maintenance reinforcement tube (or the water turning tube) by using liquid such as top / bottom water or air. Finally, the reinforcing tube is expanded so as to be brought into close contact with the conduit. As the method of tightly adhering it, for example, the pressure control system described above can be applied as it is. As a concrete example, a method of expanding by a shape memory alloy in a repair reinforcement tube as well as a direct inflation method by air, an inflation method by a water turning tube inside a repair and reinforcement tube, an inflation method by liquid such as water and sewage, And a method of applying the methods at the same time.

In one embodiment of the present invention, the maintenance and reinforcement tube tightening step (S90) is performed such that the maintenance reinforcement tube is inflated by the inflated water turning tube, and the outer circumferential surface of the repair and reinforcement tube is in close contact with the inner circumferential surface of the tube, The repair and reinforcement tube is cured and adhered directly to the conduit at room temperature over time to repair. When the repair is completed, the equipment such as the water turning tube and various opening / closing means are removed and the work is finished.

Therefore, the water-repellent irrigation pipe maintenance method using the room temperature curable pipe maintenance reinforcement tube of the present invention can be completed only by expanding and adhering the maintenance reinforcement tube by using water / Since it is not necessary to keep the facility on the ground until the curing is completed, the construction time can be greatly shortened. This is due to the fact that the water / sewage can continue to flow into the reinforcing tube closely attached to the inner circumference of the conduit in the uncompleted state of the reinforcement tube.

In one example of the present invention, the interior of the body of the repair and reinforcement tube is not limited to attain the object of the present invention, but may be formed, for example, by including a shape memory alloy, Can be inflated. In addition, the maintenance and reinforcement tube can be expanded by shape memory by the temperature of the upper / lower water.

Specifically, the shape of the shape of the shape of the shape memory alloy (temperature) allows the above-described maintenance and reinforcement tube to expand and directly adhere to the inner peripheral surface of the tube. So that it can expand automatically by shape memory temperature and adhere to the conduit without a separate expansion device or means. The temperature is not limited in so far as the object of the present invention is achieved, but may be, for example, the upper / lower temperature range. Therefore, by simply pouring the sewage / sewage, it can be directly adhered without any additional process. Therefore, by using both the expansion due to the shape memory alloy and the flow of the water flowing into the inside of the conduit, the maintenance and reinforcement tube is in close contact with the inner circumference of the conduit, so that all the conduits can be easily repaired irrespective of the amount of the flowing water / .

Further, the maintenance and reinforcement tube can be inflated by the flow of the water / sewage in the water turning tube, and the inside of the tube and the outside of the maintenance and reinforcement tube can be automatically cured at room temperature. Therefore, in order to repair the pipelines, there is an effect of fundamentally preventing the problems caused by the use of the equipment since the conventional equipment is not used in the repair work.

In one example of the present invention, the inside of the body of the repair and reinforcement tube is not limited to achieve the object of the present invention, but for example, a heat ray can be further formed. If the temperature of the water / sewage is not compatible with the forming storage temperature, expansion using a forming memory alloy is possible by hot wire.

As described above, by combining one or more of a room temperature curable pipe maintenance reinforcement tube, a water / sewage pipe reinforcement packer, a water wheel unguarded pipe repair method, and a room temperature hardenable pipe maintenance reinforcement tube having a shape memory alloy, Time required according to. It is possible to control not only the size of the repair work, the physical properties at the time of completion of curing, but also the ease and the improvement.

In another aspect of the present invention, a method for adjusting the curing delay time of a room temperature curable pipe maintenance reinforcing tube,

a) adjusting a content ratio of a mixed liquid including a polymer resin, a curing agent and a curing retardant;

b) adjusting the impregnation rate of the mixed solution impregnated in the nonwoven fabric;

c) preparing a repair and strengthening tube formed of a nonwoven fabric impregnated with the mixed solution; And

d) adjusting the temperature;

. ≪ / RTI >

In one embodiment of the present invention, the step a) is a step of controlling the impregnation rate of the mixed solution impregnated in the nonwoven fabric. The content of the curing agent is not limited to achieve the object of the present invention, 5 parts by weight. As the content of the curing agent increases within the above range, the curing delay time is shortened to a straight line, so that the curing delay time of the curing reinforcement tube can be easily adjusted.

In one embodiment of the present invention, the step b) is a step of adjusting the impregnation rate of the mixed solution impregnated in the nonwoven fabric, and the impregnation rate is not limited to the attainment of the object of the present invention. %. ≪ / RTI > If the impregnation rate is within the range, the impregnated state can be more stabilized, so that the hardening delay time of the repair and strengthening tube can be easily adjusted.

In one embodiment of the present invention, step d) is a temperature control step, which means a temperature at the time of manufacturing the maintenance-reinforcement tube or a storage temperature of the manufactured maintenance-reinforcement tube.

As a specific example, the curing delay time of the repair and reinforcement tube according to the storage temperature is not limited to achieve the object of the present invention, but may be, for example, 2 to 35 hours at 10 to 35 ° C. A specific example may be 15 to 35 hours at 8 to 12 占 폚, 5 to 12 hours at 13 to 17 占 폚, 2.5 to 7.5 hours at 22 to 28 占 폚 and 2 to 4.5 hours at 32 to 38 占 폚.

As described above, the curing delay time during production can be controlled primarily by controlling the content ratio of the mixed liquid including the polymer resin, the curing agent and the curing retarder, and the secondary temperature The curing delay time can be controlled more precisely. Also, the hardening delay time can be controlled by adjusting the impregnation rate during the production.

That is, a non-limiting example is that the pre-maintenance reinforcing tube is manufactured so as to have an uncured maintenance time suitable for the ambient temperature (seasonal average temperature, etc.), and then the process of transporting or storing the pre-

In another embodiment of the present invention, the method of adjusting the hardening delay time of the room temperature hardenable pipe maintenance reinforcing tube can be used in a non-drilled pipe maintenance method. Specifically, the method may include a step of injecting a repairing and reinforcing tube by the curing delay time adjusting method into the pipe. Therefore, it is easy to apply to non-digging type pipe maintenance method requiring hardness above a certain level when curing is completed, and there is a characteristic that it can be used in the inside / outside environment of the conduit where water is always accompanied.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples. However, the present invention is described in more detail with reference to the following Examples. However, the scope of the present invention is not limited by the following Examples.

10 parts by weight of maleic anhydride, 5 parts by weight of phthalic anhydride, 20 parts by weight of terephthalic acid, 5 parts by weight of ethylene glycol, 10 parts by weight of diethylene glycol, 5 parts by weight of propylene glycol, 5 parts by weight of dipropylene glycol, 0.6 parts by weight, 0.7 parts by weight, 0.8 part by weight, 0.9 part by weight, and 1.0 part by weight (based on 100 parts by weight of an unsaturated polyester resin (CW-350, Aekyung Chemical) containing 40% by weight of methyl ethyl ketone peroxide curing agent , 1.1 parts by weight and 1.2 parts by weight were mixed and impregnated with a polyethylene-coated nonwoven fabric (10 × 10 cm, 350 g / m ² , thickness: 3 mm, Donghae Hi-Tech) . Each of the nonwoven fabrics thus prepared was allowed to stand at 25 占 폚 and 30 占 폚, and the uncured holding time until the curing progressed was measured. The results are shown in Fig.

When the content of the curing agent is less than 0.6 parts by weight based on 100 parts by weight of the unsaturated polyester resin, it is confirmed that the hardness is lowered at the completion of curing although it is not described in the examples. Respectively.

1.1 parts by weight of a p-tert-butyl-catechol curing retarder based on 100 parts by weight of the unsaturated polyester resin of Example 1, 0.8 parts by weight of methyl ethyl ketone peroxide curing agent, 0.9 parts by weight, 1.0 part by weight and 1.1 parts by weight (10 x 10 cm, 350 g / m ² , 3 mm or 5 mm in thickness, Donghae Hi-Tech Co., Ltd.) was impregnated with polyethylene on one side to prepare a nonwoven fabric according to the content of each curing agent. The nonwoven fabrics thus prepared were allowed to stand at 10, 15, 25 and 35 ° C, respectively, to measure the uncured holding time and Shore hardness (D) until curing was carried out. (Shore D hardness was measured according to ASTM D2583 using Shore D type Measured with a Barcol durometer). The results are shown in Table 1 below.

As shown in Table 1, the curing delay time tends to decrease with increasing the curing agent content and with increasing temperature.

0.2 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight of a hardening retarder were added together with 1 part by weight of a methyl ethyl ketone peroxide hardening agent based on 100 parts by weight of the unsaturated polyester resin of Example 1, parts by weight, 0.9 parts by weight and 1.0 part by weight, 1.1 parts by weight and 1.2 parts by weight were mixed in 21.5 ℃, the polyethylene coating on one side non-woven fabric (10 × 10 cm, 350 g / m 2, a thickness of 3 mm or 5 mm , Donghae Hi-Tech Co., Ltd.) to prepare nonwoven fabrics according to the content of each hardening retarder. Each of the nonwoven fabrics thus prepared was allowed to stand at 21.5 占 폚 to measure the uncured holding time until the curing progressed. The result is shown in Fig.

When the content of the hardening retarder was 0.5 parts by weight or more based on 100 parts by weight of the unsaturated polyester resin, it was confirmed that the uncured holding time significantly increased. When it was less than 0.6 part by weight, it was confirmed that a heat generation phenomenon appeared. Therefore, it is preferable that the content of the curing retarder used in the room temperature curable pipe maintenance reinforcing tube of the present invention, in which control of the curing delay time is important, is 0.1 part by weight or more, preferably 0.5 parts by weight, more preferably 0.6 parts by weight or more, have.

To 100 parts by weight of the unsaturated polyester resin of Example 1 were added 0.7 part by weight, 0.8 part by weight, 0.9 part by weight, 1.0 part by weight of methyl ethyl ketone peroxide curing agent together with 1.0 part by weight of a p-tert- 1.1 parts by weight and 1.2 parts by weight were mixed at room temperature and then impregnated with a nonwoven fabric (10 × 10 cm, 350 g / m ² , thickness 3 mm, thickness: 3 mm, Donghae High Tech) coated with polyethylene on one side with an average impregnation ratio of 21.5% To prepare nonwoven fabrics according to the content of each hardener. Each of the nonwoven fabrics thus prepared was allowed to stand at 1, 4, and 7 ° C (± 1 ° C), respectively, and the uncured holding time until the curing progressed was measured. The results are shown in Table 2 below.

As shown in Table 2, when the content of the curing agent was 0.7 to 1.2 parts by weight based on 100 parts by weight of the unsaturated polyester resin, the nonwoven fabric had a curing delay time (storage stability) of 24 hours or more at a temperature of 5 DEG C or less considering the error range . Also, storage stability was observed for 21 hours at temperatures below 8 ℃ considering the error range.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims (1)

A non-digging type pipe maintenance and reinforcement method for introducing a room temperature curable pipe maintenance reinforcing tube into a pipe, expanding the pipe,
The non-drilled pipe maintenance and reinforcement method comprises:
And the outer surface of the water turning tube for allowing the upper / lower water to flow into the inside of the pipe while the repair and strengthening tube is cured is inserted into the inner surface of the pipe, And inflates the maintenance and reinforcement tube by flowing the sewage,
Wherein the room temperature curable pipe maintenance reinforcing tube comprises a body made of a nonwoven fabric impregnated with a mixed solution containing a polymer resin including at least one selected from an epoxy resin and an unsaturated polyester resin, a curing agent and a curing retarder, A water-repellent layer,
The curing agent may be selected from the group consisting of methyl ethyl ketone peroxide, dicumyl peroxide, benzoyl peroxide, dibenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, t-butyl perbenzoate, (T-butylperoxy) hexyne-3, alpha, alpha-bis (t-butylperoxy) diisopropylbenzene, di- ) Benzene, di- (2-tert-butylperoxyisopropyl) benzene, and derivatives thereof, wherein 0.8 to 5 parts by weight of the peroxide-based curing agent is added to 100 parts by weight of the polymer resin Mixed,
Wherein the curing retarder is selected from the group consisting of a quaternary curing retarder containing p-tert-butyl catechol, a quinone-based curing retarder containing at least one selected from benzoquinone and hydroquinone, Wherein the polymer is mixed in an amount of 0.6 to 5 parts by weight based on 100 parts by weight of the polymer resin,
The mixed solution is impregnated into the nonwoven fabric at an impregnation rate of 5 to 70%
Wherein the room temperature curable pipe maintenance reinforcing tube has an uncured maintenance duration of from 2 to 35 hours at 10 to 35 DEG C to store the pre-maintenance reinforcement tube after manufacturing.

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