KR20230152371A - Liner construction methods for old pipe regeneration - Google Patents

Abstract

The present invention relates to an old pipe rehabilitation method, a liner folding process consisting of immersing an extruded liner and folding it into a plate shape, and a folded liner winding process consisting of a process of winding the folded liner processed through the liner folding process onto a liner reel. , a work tool excavation process consisting of the process of excavating work tools for work at both ends of an old pipe requiring repair, an old pipe cleaning process consisting of a process of inserting a cleaner into the inside of the old pipe to clean the inside of the old pipe, and the old pipe cleaning process. The old pipe detection process consists of inserting a camera into an old pipe that has been cleaned and checking for branch pipes and damaged areas, the liner insertion process consists of inserting a folded liner into the old pipe, and the process of injecting steam into the folded liner inserted into the old pipe. A heat-and-pressure lining process consisting of heating and expanding to closely adhere to the inner wall of an aged pipe; a pipe connection process consisting of forming flanges on both ends of the liner that has been lined through the heat-and-pressure lining process to connect it to a pipe outside the work section; and expansion. It consists of a crack detection process to find cracks in the inner wall of the old liner, a lining repair process to repair the discovered cracks, and a work purchase process to bury the excavated work hole to repair the old pipe. This involves inserting the liner into the old pipe. This is to solve damage such as cracks inside the liner due to weakened flexibility during the winding process of the liner.

Description

Fold liner old pipe regeneration method {Liner construction methods for old pipe regeneration}

The present invention relates to a folded liner aging pipe rehabilitation method, and more specifically, in the old pipe rehabilitation method, a liner winding warming process consisting of a process of heating a liner wound on a liner reel when the temperature of the surrounding environment is below a set temperature, and the liner A liner insertion process, which consists of inserting a heated folded liner that has been softened through a rolling heating process into an old pipe, and a heat-and-pressure lining process, which consists of a process of injecting steam into the folded liner inserted into the old pipe, heating and expanding it, and lining it closely to the inner wall of the old pipe. The purpose is to repair cracks and damage during the unwinding process of the liner by softening and heating the liner that is rolled out in a working environment where hardening damage of the liner is a concern.

In general, when a water pipe buried underground is used for more than a certain period of time, the inner surface corrodes and foreign substances contained in the raw water adhere to it, forming scale.

As described above, when the inner surface of the water pipe is corroded and scale is formed, the quality of the raw water deteriorates, and leakage occurs due to damage to the corroded part, so old buried water pipes are replaced with new water pipes at regular intervals.

On the other hand, as mentioned above, in order to replace old pipes, traffic on the road must be controlled and the road must be excavated, which causes traffic disruption and requires a lot of money. Therefore, work holes must be excavated at regular intervals in the area where the old pipe is buried. A method of rehabilitation is being used by cutting the old pipe and inserting a polyethylene liner into the old pipe.

However, in the conventional rehabilitation of old pipes as described above, there was a problem in that the flexibility of the rolled liner was weakened in the process of being unwound during the process of inserting the liner into the old pipe, causing damage such as cracks inside the liner.

Republic of Korea Patent No. 10-0815838

Accordingly, the present invention is intended to solve the cracks generated inside the liner when the liner is unwound during the process of inserting the liner into the old pipe in the rehabilitation of the conventional old pipe as described above.

That is, the present invention is a folded liner consisting of a liner folding process consisting of a process of immersing an extruded liner and folding it into a plate shape in an old pipe rehabilitation method, and a process of winding the folded liner processed through the liner folding process onto a liner reel. A winding process, a work tool excavation process consisting of the process of excavating work tools for work at both ends of an old pipe requiring repair, an old pipe cleaning process consisting of a process of inserting a cleaner into the inside of the old pipe to clean the inside of the old pipe, and the old pipe cleaning process. Through the process, an old pipe detection process consists of inserting a camera into an old pipe that has been cleaned and checking branch pipes and damaged areas, a liner insertion process consisting of a process of inserting a folded liner into the old pipe, and steam is applied to the folded liner inserted into the old pipe. A heat-and-pressure lining process consisting of the process of injecting and heating and expanding to closely adhere to the inner wall of the aged pipe, and a pipe connection process consisting of forming flanges at both ends of the liner that has been lined through the heat-and-pressure lining process to connect it to a pipe outside the work section. It is characterized by a work purchase process consisting of a crack search process to find cracks in the inner wall of the expanded liner, a lining repair process to repair the discovered cracks, and a process to bury the work tool excavated to repair the old pipe. .

Therefore, the present invention is a liner insertion process consisting of a process of inserting a folded liner into an old pipe, a heat-and-pressure lining process consisting of a process of injecting steam into the folded liner inserted into the old pipe, heating and expanding it, and lining it closely to the inner wall of the old pipe, and an expanded liner. It consists of a crack detection process to find cracks in the inner wall of the pipe, and a lining repair process to repair the discovered cracks. The purpose is to effectively find damage such as cracks inside the liner, and completely restore the cracks so that they adhere tightly to the inner wall of the old pipe without cracks. It was done.

Figure 1 is a schematic diagram of a folded liner aging pipe rehabilitation method showing an embodiment of the present invention.
Figure 2 is a schematic diagram of a folded liner aging pipe rehabilitation method showing an embodiment of the present invention.
Figure 3 is a schematic diagram of a folded liner aging pipe rehabilitation method showing an embodiment of the present invention.
Figure 4 is a schematic diagram of a folded liner aging pipe rehabilitation method showing an embodiment of the present invention.
Figures 5 and 6 are diagrams showing the crack detection process of the folded liner old pipe rehabilitation method according to an embodiment of the present invention.
Figures 7 and 8 are diagrams showing the liner repair process of the folded liner old pipe rehabilitation method according to an embodiment of the present invention.

Hereinafter, it will be described in detail with the accompanying drawings as follows.

The present invention is intended to prevent damage during the unwinding process of the liner 30 by softening and heating the liner 30, which is rolled out in a working environment where hardening damage of the liner 30 is a risk.

Terms or words used in this specification and claims should not be construed as limited to their common or dictionary meanings, and the inventor may appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent the entire technical idea of the present invention, so they can be replaced at the time of filing the present application. It should be understood that various equivalents and variations may exist.

That is, the present invention relates to a rehabilitation method for an old pipe (20), a liner folding process (100), a folding liner winding process (200), a work tool excavation process (300), an old pipe cleaning process (400), and an old pipe detection process (500). ), liner insertion process (600), heat and pressurization lining process (700), pipe connection process (800), crack detection process (900), lining repair process (1000), and work purchase mall process (1100).

Here, the liner folding process 100 consists of immersing the extruded liner 30 and folding it into a plate shape.

The liner folding process 100 can be performed so that the liner 30 extruded in the extruder is continuously formed without cutting.

The liner folding process (100) includes a liner curing step (11) in which the liner (30) is extruded to a certain length in an extruder and cured for a certain period of time, and a liner bonding step (11) in which the liner (30) cut to a certain length and cured is heat-melted and bonded. Molding can be performed using the liner 30 bonded through step 12.

The liner folding process (100) can be performed so that the folding taping step (110) is performed in which the folded liner (30) is taped and bound to prevent it from unfolding.

And, the folded liner winding process 200 consists of winding the folded liner 30 processed through the liner folding process 100 onto the liner 30 reel.

The folded liner winding process 200 can be performed so that the winding taping process 210 is performed to prevent the liner 30 from coming loose due to the elastic force of the liner 30 during the winding process of the liner 30. .

In the process of winding the liner 30, a winding warming step may be performed to prevent bending damage of the liner 30 when the temperature of the surrounding environment is below the set temperature.

In addition, the work tool excavation process 300 consists of excavating work tools for work at both ends of the old pipe 20 that requires repair.

Additionally, the old pipe cleaning process 400 consists of inserting a cleaner into the old pipe 20 to clean the inside of the old pipe 20.

In addition, the old pipe detection process 500 consists of inserting a camera 43 into the old pipe 20 that has been cleaned through the old pipe cleaning process 400 to check branch pipes and damaged areas.

Additionally, the liner insertion process 600 consists of unscrewing the folded liner 30 and inserting it into the aged pipe 20.

The liner insertion process 600 can be performed by including a tape cutting step 610 of cutting the binding tape taped to the folded liner 30.

In addition, the heating and pressurizing lining process 700 consists of injecting steam into the folded liner 30 inserted into the aged pipe 20, heating and expanding it, and closely lining the inner wall of the aged pipe 20.

In addition, the pipe connection process 800 consists of forming flanges at both ends of the liner 30 whose lining has been completed through the heat and pressure lining process 700 and connecting it to a pipe outside the work section.

The crack detection process 900 is a process of finding damage such as a crack 50 on the inner surface of the liner 30 when lining the inner wall of the aged pipe 20 in close contact with the heat and pressure lining process 700.

The crack detection process 900 includes a method of detecting capacitance, a method of detecting leakage current through grounding of high-voltage current, a method of detecting a change in a magnetic field, a method of detecting internal pressure, a method through shooting with a camera 43, and a method of detecting a leakage current through grounding of a high-voltage current. (30) Any one of the methods of detecting the fluorescent material by pre-applying the fluorescent material inside can be selected and applied.

The crack detection process 900 can be performed through the crack detection device 40.

The crack detection device 40 includes a cart 41 that moves inside the liner 30, and an actuator 42 or a detection camera 43 that protrudes upward and downward from the cart 41.

The actuator 42 includes one of the following devices: detecting capacitance, detecting leakage current through grounding of high-voltage current, detecting changes in magnetic field, or detecting internal pressure.

The lining repair process (1000) is a process of restoring damage such as a crack (50) discovered through the crack detection process (900) to its original state.

The lining repair process 1000 may be a V-groove 61 welding and filling method in which a V-shaped groove is created in the detected crack 50, filled, and welded.

In addition, the lining repair process 1000 can be a melt adhesion method in which the detected crack 50 is repaired by pushing both sides toward the center of the crack 50 and melting it.

In addition, the work purchase burial process 1100 consists of a process of burying the work tool excavated for repair of the old pipe 20.

Hereinafter, the effects of applying the present invention will be described as follows.

As described above, in the aging pipe 20 rehabilitation method, a liner folding process 100 consisting of a process of immersing the extruded liner 30 and folding it into a plate shape, and a folded liner processed through the liner folding process 100. A folded liner winding process (200) consisting of a process of winding (30) onto the liner (30) reel, a work tool excavation process (200) consisting of a process of excavating work tools for work on both ends of an old pipe (20) requiring repair ( 300), an old pipe cleaning process (400) consisting of a process of cleaning the inside of the old pipe (20) by inserting a cleaner into the old pipe (20), and a camera attached to the old pipe (20) that has been cleaned through the old pipe cleaning process (400). An old pipe detection process (500) consisting of a process of inserting (43) to check the branch pipe and the damaged area, a liner insertion process (600) consisting of a process of inserting a folded liner (30) into the old pipe (20), and an old pipe (20). ) A heating and pressurizing lining process (700) consisting of the process of injecting steam into the folded liner (30) inserted into the folded liner (30) to heat and expand it to closely adhere to the inner wall of the aged pipe (20). Lining is completed through the heating and pressurizing lining process (700). A pipe connection process (800) consisting of forming flanges at both ends of the liner (30) and connecting them to pipes outside the work section, a crack detection process (900) of finding cracks (50) in the inner wall of the expanded liner (30), The present invention is implemented by applying the present invention, which consists of a lining repair process (1000) for repairing the discovered crack (50) and a work purchase process (1100) consisting of a process for burying the excavated work tool to repair the old pipe (20). When this happens, damage such as a crack 50 is effectively found inside the liner 30, and the crack 50 is completely restored to adhere to the inner wall of the aged pipe 20 without a crack 50.

11: Liner curing step
12: Liner joining step
20: Old building
30: Liner
40: Crack detection device 41: Cart
42: Actuator 43: Camera
50: crack
61: V groove
100: Liner folding process 110: Folding taping step
200: Fold liner winding process 210: Winding taping process
300: Work tool excavation process
400: Old pipe cleaning process
500: Old pipe detection process
600: Liner insertion process 610: Tape cutting step
700: Heating and pressing lining process
800: Pipe connection process
900: Crack detection process
1000: Lining repair process
1100: Work purchase mall process

Claims (13)

In the old pipe rehabilitation method;
In the aging pipe rehabilitation method, a liner folding process consisting of a process of immersing an extruded liner and folding it into a plate shape, a folded liner winding process consisting of a process of winding the folded liner processed through the liner folding process onto a liner reel, and repair. A work tool excavation process consisting of the process of excavating work tools for work at both ends of the required old pipe, an old pipe cleaning process consisting of a process of inserting a cleaner into the inside of the old pipe to clean the inside of the old pipe, and cleaning through the old pipe cleaning process. The old pipe detection process consists of inserting a camera into the completed old pipe to check branch pipes and damaged areas, the liner insertion process consists of inserting the folded liner into the old pipe, and the heating and expansion process by injecting steam into the folded liner inserted into the old pipe. A heat-and-pressure lining process consisting of a process of closely lining the inner wall of an old pipe, a pipe connection process consisting of a process of forming flanges at both ends of the liner that has been lined through the heat-and-pressure lining process and connecting it to a pipe outside the work section, and a process of connecting the expanded liner to a pipe outside the working section. A folded liner old pipe rehabilitation method that consists of a crack search process to find cracks in the inner wall, a lining repair process to repair the discovered cracks, and a work purchase burial process consisting of a process to bury the excavated work hole to repair the old pipe.
According to claim 1;
The liner folding process is a folding liner aging pipe rehabilitation method, characterized in that the liner extruded in the extruder is continuously formed without cutting.
According to claim 1;
The liner folding process consists of a liner curing step in which the liner is extruded to a certain length in an extruder and cured for a certain period of time, and a liner bonding step in which the liner cut to a certain length and heat-melted and bonded is formed using the bonded liner. A folding liner aging pipe rehabilitation method characterized by:
According to claim 1;
A folded liner old pipe rehabilitation method, characterized in that the folded liner folding process includes a folding taping step in which the folded liner is taped to prevent it from unfolding. According to claim 1;
The folded liner winding process is a folded liner aging pipe rehabilitation method, characterized in that the winding taping process is performed to prevent the liner from coming loose due to the elastic force of the liner during the winding process of the liner.
According to claim 1;
The folded liner old pipe rehabilitation method is characterized in that the crack detection process is performed by detecting electrostatic capacity.
According to claim 1;
The crack detection process is a folded liner old pipe rehabilitation method characterized by detecting leakage current through grounding of high-voltage current.
According to claim 1;
The folded liner old pipe rehabilitation method is characterized in that the crack detection process is performed by detecting changes in the magnetic field. According to claim 1;
The folded liner old pipe rehabilitation method is characterized in that the crack detection process is performed using an internal pressure detection method.
According to claim 1;
The folded liner old pipe rehabilitation method is characterized in that the crack detection process is accomplished through camera photography.

According to claim 1;
The crack detection process is a folded liner aging pipe rehabilitation method, characterized in that the fluorescent material is previously applied to the inside of the liner and the fluorescent material is detected.
According to clause 1,
The liner repair process is a folded liner old pipe rehabilitation method, characterized in that the V-groove welding filling method is performed by creating a V-shaped groove in the detected crack, filling it, and welding it.
According to clause 1,
The lining repair process is a folded liner old pipe rehabilitation method, characterized in that it consists of a melt adhesion method in which the detected crack is repaired by pushing both sides toward the center of the crack and melting it.

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