KR102316427B1 - Method for repairing old pipe - Google Patents

Abstract

The present invention inserts a lining (PE pipe) into an old water pipe to which a flange is joined or combined, and inserting the lining so that both ends of the old water pipe protrude, and a circular band for limiting expansion due to thermal expansion is the lining The step of fitting and coupling to each end of the protrusion of The step of adhering to the lining, the step of cutting the protruding lining after removing the circular band and the sealer, and the steps of fusing the lining-coupled flange to be coupled with the flange to each end of the cut both ends of the lining, the lining Forming bolt fastening holes in the lining-coupled flange that is in close contact with the flange joined or coupled to the old water supply pipe by the contraction of, but forming bolt fastening holes at each point facing the bolt fastening holes formed in the flange And, it characterized in that it comprises the step of flange-coupled facing the flange of the old water supply pipe side to which the lining coupling type flange is in close contact with the deformed side flange.

Description

Non-excavation rehabilitation method for endless water supply pipe inserting PE pipe {METHOD FOR REPAIRING OLD PIPE}

The present invention relates to a method for rehabilitating an aged water supply pipe, and more particularly, to a non-excavating rehabilitation method for an aging water pipe that can regenerate an aged water pipe by regenerating the old water pipe or by inserting a PE pipe without a water cutout.

For example, a water pipe buried in the ground uses a cast iron pipe or a steel pipe. If these water pipes are used for a long time, they deteriorate and damage such as corrosion or breakage occurs, and the damaged water pipes must be replaced.

In order to replace an old water pipe like a water pipe, it is a method of excavating the ground, removing the buried old water pipe, and then laying a new water pipe. .

In order to solve this problem, as shown in Patent Registration No. 10-0606188, the old water pipe is repaired by inserting a synthetic resin (PE) lining (also called PE pipe) inside the water pipe without replacing the entire old water pipe. A method of regeneration has been developed.

According to the water pipe rehabilitation method described in the registered patent, a lining made of a synthetic resin material is inserted into the inside of the old water pipe, and high temperature and high pressure steam is supplied to the inside of the lining so that the peripheral surface of the lining is the inner periphery of the water pipe. After expanding so that it adheres to the surface, the ends of the lining protruding from both ends of the cut water pipe are spread outward, and the end of the lining is hung and fixed to the outer end of the water pipe.

However, since the water pipe rehabilitation method of the registered patent has a structure in which the lining is caught on both ends of the water supply pipe by the outwardly widened end, the fixing strength for fixing both ends of the lining is low, so the lining cannot be accurately fixed when the lining is thermally expanded or contracted. occurs

In order to solve this problem, there is a 'PE lining fusion finishing method for water pipe rehabilitation (Registration Patent No. 10-1303259)' registered in the earlier application by the applicant of the present application. As shown in FIG. 1, the illustrated 'P-lining fusion sealing method for water supply pipe rehabilitation' is a finishing member ( 60) is hung on the end of the water supply pipe (10) and is closed in such a way as to support the lining (20).

More specifically, when the lining 20 heated to a high temperature is reduced as it cools, both ends of the lining 20 protruding to both ends of the water supply pipe 10 while the length of the lining 20 is reduced as shown in FIG. To close both ends of the lining 20 by pulling the end pipe part 61 of the closing member 60 while being depressed into the water supply pipe 10, so that the closing member 60 is caught on the end of the water supply pipe 10 will be.

However, in the above-described 'PE lining fusion sealing method for water supply pipe rehabilitation', the lining 20 inserted into the water supply pipe 10 before fusion bonding the finishing member 60 to both ends of the lining 20 has a high temperature. , by supplying high-pressure water vapor so that the lining 20 is in close contact with the inner circumferential surface of the water supply pipe 10, at this time, the portion protruding to the outside of the water supply pipe 10 also thermally expands.

As such, when the portion of the lining 20 protruding to the outside of the water supply pipe 10 thermally expands and expands in the longitudinal direction, the alignment position with the end pipe portion 61 of the closing member 60 to be coupled is inevitably shifted. As a result, there is a problem in that both ends of the lining 20 must be adjusted to match the standard of the end pipe portion 61 of the finishing member 60 . This problem results in an extended working time, and there is a high possibility that work defects may occur. Therefore, a new method for solving these problems is required.

Furthermore, in general methods of rehabilitating old pipes such as water supply pipes, the water outage should be preceded prior to construction. In the event of a water outage, the relevant agencies must notify the date and time of the water outage, the construction location, and the construction company. On the other hand, consumers who are supplied with water have to bear the inconvenience of having to receive water to be used in advance according to the contents of the prior notice, and if they do not receive the prior notice, they must bear the inconvenience caused by the water supply. A new way to regenerate old pipes such as water pipes should be considered together.

In addition, the parts and equipment used in the rehabilitation of old water pipes are generally large and heavy due to the nature of the work. You should consider what you can do together.

Republic of Korea Patent Publication No. 10-0606188 Republic of Korea Patent Publication No. 10-1303259 Republic of Korea Patent Publication No. 10-0825025

Accordingly, the present invention is an invention devised to solve the above-mentioned problems, and the main object of the present invention is to provide a non-excavating rehabilitation method of an aging water supply pipe that can regenerate an aged water pipe by inserting a PE pipe without a water supply. ,

Further, another object of the present invention is to prevent specification deformation due to thermal expansion of the lining protruding outside the old water supply pipe while being inserted into the old water supply pipe to finish the both ends of the lining more efficiently and precisely. It is to provide a non-excavation rehabilitation method for old water pipes.

In addition, another object of the present invention is to limit the length of the lining that is inserted into the old water supply pipe to thermally expand, but the lining protruding out of the old water supply pipe prevents specification deformation due to thermal expansion and shrinks into the old water pipe during cooling. To provide a water supply pipe non-excavation rehabilitation method.

In addition, another object of the present invention is to treat the flange joined to the cut old water pipe and the bolt hole to be formed in each of the finishing members fused thereto to match, thereby solving the malfunction caused by the bolt hole mismatch. To provide a non-excavation rehabilitation method or a non-excavation rehabilitation method for old water pipes,

Furthermore, the present invention relates to a non-excavating rehabilitation method or non-excavating old water supply pipe that can prevent damage that may occur in the process of fusing a flange joined to an old water supply pipe and a finishing member to be fused thereto. In providing a rehabilitation method,

An object of the present invention is to provide a non-excavating rehabilitation method or a non-excavating rehabilitation method for an aged water supply pipe that can regenerate an old water pipe without damaging the lining inserted into the old water pipe while promoting the convenience of the worker.

The old water pipe non-excavation rehabilitation method according to an embodiment of the present invention for solving the above-described technical problem,

Inserting a lining into the old water pipe to which the flange is joined or coupled, inserting the lining to protrude from both ends of the old water pipe;

fitting a circular band for limiting expansion due to thermal expansion to both ends of the protruding portion of the lining;

restoring the original shape by first heating and pressing the lining, and second heat and pressurizing the lining after coupling the sealers to both ends of the lining to bring the lining into close contact with the inner peripheral surface of the old water supply pipe;

cutting the protruding lining after removing the circular band and the obturator;

fusion-bonding a lining-coupled flange to be coupled with the flange to each end of the lining cut;

Forming bolt holes in the lining-coupled flange that is in close contact with the flange joined or coupled to the old water supply pipe due to the shrinkage of the lining, forming bolt holes at points facing the bolt holes formed in the flange;

It characterized in that it comprises the step of flange coupling facing the flange and the joint pipe side flange of the old water supply pipe in close contact with the lining coupling type flange.

In some cases, the above-mentioned old water pipe non-excavation rehabilitation method further includes the step of inserting and installing a circular maintenance regulator for maintaining the original shape of the lining inside each of both ends of the cut lining before the fusion of the lining-coupled flange. can

If, in the above-mentioned construction method, in order to rehabilitate an old water supply pipe without a water supply, the steps of digging a work area at the point where the old water pipe to be rehabilitated is located and installing the necessary temporary facilities before inserting the lining in the old water pipe; ;

Connecting the old water pipes on both sides that exist outside the range of the old water pipes to be rehabilitated to a bypass pipe to implement uninterrupted water during the time for rehabilitating the old water pipes;

Cutting the old water pipe to be rehabilitated;

Joining or coupling the flange to the end of the cut old water supply pipe;

It is characterized in that it includes; cleaning the old water supply pipe to be rehabilitated.

In the above-described non-excavated rehabilitation method for aged water supply pipes or non-excavation rehabilitation methods for aged water pipes, the inner circumferential surface of one side of the through hole of the flange coupled or joined to the aged water supply pipe has a slope that extends outward as another feature. do.

In addition, in the above-mentioned endless number of aged water pipe non-excavation rehabilitation method or old water pipe non-excavation rehabilitation method, between the flange and the lining coupling type flange facing in the step of fusing the flange and the lining coupling type flange Another feature is that a rubber packing for preventing the flange from bending is inserted.

According to the above-described problem solving means, the present invention has the effect of preventing standard deformation due to thermal expansion of the lining protruding out of the old water supply pipe by fitting a circular band at both ends of the lining protruding out of the old water pipe. there is,

Furthermore, there is an advantage in that it is easier and faster to align and join the already standardized lining finishing member (lining-coupled flange) and the lining end without additional processing or work by preventing the deformation of the size due to thermal expansion of the lining.

In addition, the present invention is the position of the bolt fastening hole formed in the flange when the lining-coupled flange is in close contact with the flange of the old water supply pipe due to the shrinkage of the lining after fusion-bonding the lining-coupled flange in which the bolt fastening hole is not formed to the lining end Since bolting holes are formed in the lining-coupled flange to meet the requirements of the general method using a lining-coupled flange with bolted holes, it is possible to significantly reduce the working time and malfunction due to the misalignment of the bolting holes. There is this.

Furthermore, the present invention is a normal rehabilitation work by removing the problems caused by beads formed on the lining by using the one formed so that the inner circumferential surface of one side of the through hole of the flange coupled or joined to the old water supply pipe has a sloped surface that extends to the outside. It provides the effect of making this happen.

In some cases, in the present invention, before cutting the old water pipe and constructing it, the old water pipe on both sides existing outside the range of the old water pipe to be rehabilitated is connected to the bypass pipe, and then the old water pipe to be rehabilitated is rehabilitated. There is an advantage in that old water pipes can be regenerated normally without water outages because construction can be carried out.

Therefore, the old water pipe rehabilitation method according to the embodiment of the present invention is more efficient and less defective than the previous methods. It is a useful invention that can be said, and it is an invention that can organize the pipe network for old water pipes that are not systematically managed.

1 is a view for explaining a known PE lining fusion sealing method for water pipe rehabilitation.
Figure 2 is an exemplary construction flow diagram for explaining the old water pipe non-excavation rehabilitation construction method according to an embodiment of the present invention.
Figure 3 is a view for explaining the non-excavation rehabilitation method of the aging water supply pipe using a bypass pipe.
4 to 12 are diagrams for each process of the old water pipe non-excavation rehabilitation method according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are only exemplified for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention are It may be implemented in various forms and is not limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention may have various changes and may have various forms, the embodiments will be illustrated in the drawings and described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

In addition, in describing the embodiment of the present invention, if it is determined that the configuration and operation-related description already known by the publication of the application may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted.

For reference, the method of rehabilitation of old water pipes will be described below. This is one example, and it will be apparent to those skilled in the art that the present invention can be applied to any old pipe that can be used as a liquid transport pipe.

Referring to the accompanying drawings, Figure 2 is an illustration of a construction flow chart for explaining the old water pipe non-excavation rehabilitation construction method according to an embodiment of the present invention, Figure 3 is a non-excavating old water supply pipe using a bypass pipe The drawings for explaining the rehabilitation method are illustrated, and FIGS. 4 to 11 illustrate views for each process of the aged water supply pipe non-excavation rehabilitation method according to an embodiment of the present invention.

Referring to FIG. 2 , first, in order to rehabilitate an old water supply pipe, as shown in FIGS. 3 and 4 , digging a work area (a) and necessary temporary facilities are installed (step S100) in order to secure a working space. Prior to the excavation of such a work area, measures for water interruption may be preceded depending on the condition of the work section or old water supply pipe, and the presence or absence of a valve.

If, in rehabilitating old water pipes, the bypass pipe 100 may be used as shown in FIG. That is, as shown in FIG. 3 , the process of connecting the old water supply pipes on both sides that exist outside the range of the old water pipe 110 to be rehabilitated to the bypass pipe 100 (step S110) can be performed preferentially. .

More specifically, the actuator pipe 114 and the valve 115 are installed in the old water supply pipe 110 in the both sides of the work port (a), and the old water pipe 110 is drilled with a non-stage perforator. After the completion of the drilling, the drilling machine is removed and the deformed tube 116 is connected and joined. The bypass pipe 100 is a PE pipe, and when the steel pipe and the PE pipe 100 are connected, the PE pipe connection adapter 117 is jointly connected to connect a plurality of PE pipes 100 by fusion bonding. In addition, by installing an air valve 119 on one side, it is possible to prevent water hammer in advance when passing water. Reference numeral 113, which has not been described, denotes a shut-off valve for a pipeline to be rehabilitated, and reference numeral 118 denotes an iron flange for PE flange protection.

If the water cutoff is necessary, as shown in FIG. 4, both ends of the old water supply pipe 110 to be rehabilitated are cut to a certain length (step S120) and CCTV is inspected to check the condition. CCTV investigation may be performed before cleaning the water pipe in step S140 to be described later.

Then, the steel flange 120 is welded to both ends of the cut old water supply pipe 110 according to the material of the water pipe, and then bolted and joined (step S130) or the flange socket pipe 120a is joined, and then the old water pipe 120. is cleaned and scaled (step S140).

For reference, the inner peripheral surface of one side of the through hole of the flange 120 or flange socket pipe 120a coupled or joined to the old water supply pipe 110 is manufactured to have an inclined surface 120b (about 45 degrees) extending outward. it is preferable This limits the length at which the bead generated in the process of fusion bonding of the flange 120 or the flange socket pipe 120a with one surface of the flanged socket pipe 120a, which will be described later, is contracted in the contracting process of the lining 130, resulting in This is to remove a factor that may prevent the flange 120 or one surface of the flange socket pipe 120a and the lining coupling type flange from being in close contact.

When the above-described pre-process is completed, as shown in FIG. 5, a PE material lining (also referred to as a tube or pipe, 130) is inserted into the old water supply pipe 100 bonded to the flange 120, but the old water pipe 100 The lining 130 is inserted at both ends to protrude (step S160). For convenience of insertion, the lining 110 is inserted in a folded state. Since the weight of the lining 110 is considerable depending on the length of the section to be rehabilitated, it is inefficient to insert only the operator's force, and the rotary trailer on which the lining 130 is wound is located on the ground, and the old water pipe 110 ) is a high risk of damage to the lining 130 due to the contact between the lining 130 and the flange 110 because it is located in the underground work area (a).

Accordingly, as shown in FIG. 5, after mounting the PE material lining 130 on the rotary trailer, the parking is fixed firmly on one side of the section to be rehabilitated, and the wire 131 that has passed through the pulley 132 using a winch is used. To tow the lining 130, and the side where the lining 130 is inserted, using equipment such as an excavator and a loop line 133 to support the lining 130 and sequentially insert it into the old water supply pipe 110, the operation It is possible to save time as well as to reduce the effort of the operator, as well as to eliminate the risk of damage to the lining 130 .

In order to prevent damage to the lining 130, as shown in FIG. 5, at the end of the old water supply pipe 110 to which the flange 120 junction or the flange socket pipe 120a is coupled before step S160, the guide frame for protecting the lining ( 140) may be installed (step S150). One end 141 of the guide frame 140 for lining protection is attached to the inner surface of the old water supply pipe 110, and the other end 143 is a bolt (B) and a nut to the steel flange 120 or flange socket pipe 120a. (N) is combined.

When the lining 130 is inserted into the old water pipe 110, the circular band 151 is fitted to the portion of the lining 130 that protrudes to the outside of the old water pipe 110 as shown in FIG. 6 after fitting (S170 step) )do. This process is preferably performed after the lining 130 is restored to a circular shape to some extent as shown in FIG. 6 by first supplying high-temperature and high-pressure steam to the lining 130 in the folded state.

The circular band 151 may be referred to as an external standard retainer. Both ends of the lining 130 protruding to the outside of the old water pipe 110 are thermally expanded and deformed by the supply of high-temperature and high-pressure steam, so that the finishing member of the lining 130 to be described later (that is, the PE material lining-coupled flange) and the specification mismatch It is used to prevent normal bonding due to this. In addition, it may be used to prevent the heated lining 130 from entering the inside of the water supply pipe 110 more than necessary due to shrinkage in the process of cooling. That is, the circular band 151 is fitted to the portion of the lining 130 protruding out of the water supply pipe 110 in order to limit the deformation of the lining 130 due to thermal expansion and limit the contraction in the longitudinal direction during cooling. .

Since this circular band 151 has a different degree of contraction depending on the thickness of the lining 130, set a preferred separation distance from the flange 110 joined to the water supply pipe 110 according to the thickness of the lining 130 (preferably) is 0.3% of the length of the regeneration extension) and is preferably fitted to the lining 130 .

In addition, as shown in FIG. 6 on the outer peripheral surface of the circular band 151 fitted to the lining 130, one or more engaging rings 153 to limit the contraction movement distance due to contact with the flange 120 when the lining 130 is contracted. ) is preferably formed. This locking ring 153 may be used as a handle when the circular band 151 is released. For reference, the inner diameter of the circular band 151 will have to be determined according to the circular standard of the lining 130 that is inserted into the water supply pipe 110 and is in close contact.

On the other hand, when the fitting of the circular band 151 to the lining 130 exposed out of both ends of the water supply pipe 110 is completed, the operator has a (tube) sealer (also called an end plug) at both ends of the lining 130 ) 160 ) to preheat the lining 130 for a short time using a steam supply so that it can be installed. The sealer 160 is coupled to both ends of the lining 130 preheated to a high temperature using a sealant installation tool (step S180), and firmly fastened with the sealer release device tightening band 160a. Then, the lining 130 is heated and pressurized (step S190) by supplying high-temperature and high-pressure steam to the inside of the lining 130 with a steam supply.

The circumferential surface of the lining 130 inserted into the water supply pipe 110 by this secondary heating and pressure is in close contact with the inner peripheral surface of the water supply pipe 110 as shown in FIG. 6 . In addition, both ends of the lining 130 protruding out of the water supply pipe 110 by the secondary heating and pressurization are also thermally expanded, but since the degree of thermal expansion is limited by the fitted circular band 151, the circular band 151 is wrapped Each of both ends of the lining 130 does not exceed the circular standard. After the above-described secondary heating and pressurization, cooling air is supplied and the lining 130 is cooled and compressed slowly until the internal temperature is 30° C. or less (step S190).

During cooling, the operator removes the circular band 151 and the sealer 160 (step S200), and then cuts the lining 130 of the portion where the circular band 151 was located using a cutter (step S210).

Then, as shown in FIG. 7, the operator installs a hydraulic jack 170 for preventing the lining from sliding at a predetermined position on the inner surface of one end of the lining 130 inserted into the old water supply pipe 110 to be compressed on the circumferential surface of the lining 130. And, the outer circumferential surface of the lining 130 is strongly pressed to the inner circumferential surface of the water supply pipe 110 and pressed using the adjusting bolt 185 of the circular holding controller 180 (also called the internal standard retainer) so that it is fixed in close contact with the press plate ( 183) can be firmly inserted into the circumferential surface of the lining 130 (step S210). A stopper described in detail in Patent Registration No. 10-1303259 previously applied and registered by the applicant of the present application may be used in place of the original shape maintenance controller 180 .

The worker who cut both ends of the lining 130 protruding to the outside of the old water supply pipe 110 as described above as shown in FIG. 8 for the finishing treatment of both ends of the cut lining 130 thereafter (130) The end surfaces (137, corresponding to the fusion surface) of both ends are fusion-bonded (step S220) of the lining-coupled flange 190 made of PE material, which is a finishing member.

For reference, the lining coupling type flange 190 used in the embodiment of the present invention is a ring-type finishing member having a through hole in the center, and a bolt fastening hole (bolt hole) is not formed in the flange portion forming the ring. characterized by having

Hereinafter, the process of heating the fusion surfaces of the flanges to be fused and the process of fusion of the flanges using the hydraulic pressure welding machine 340 will be described in sequence with reference to FIGS. 8 and 9 . The reason for using the pressure welding machine 340 for hydraulic pressure is to prevent this because, when the pressure welding is performed by the force of the operator, there is a high possibility that a work defect may occur due to the application of an uneven force.

First, as shown in FIG. 8, a small automatic winch 213 is installed on the upper hook line 214 for traction on the hanger 211 for traction hook of the heater and the upper hook line 214 is installed. The lower traction hook line 212 is hung on the hook 215 of the installed automatic winch 213 , and the heater 200 is connected to the lower traction hook line 212 .

The heating surface of the connected heater 200 is heated by adjusting the automatic winch 213 to install it between the end surface 137 of the lining 130 to be fused to each other and the end surface 192 of the lining coupling type flange 190, and , When each heated end surface (137, 192) is melted and ready for fusion, the operator pulls and releases the lower traction ring line (212) with one touch, then the heater 200 automatically moves to the upper part by the traction force of the automatic winch (213). moved and detached.

More specifically, as shown in FIG. 9, the hydraulic welding device 300 is a device for more accurately welding the lining 130 and the lining-coupled flange 190, and the flange jointly installed at the end of the old water supply pipe 110. It is a hydraulic welding machine composed of a standard maintenance jig 370 for welding that is firmly attached to the 120 and a pressing plate 340 for welding that is assembled and installed in the pressing cylinder 350 of the welding machine.

Before fusing the lining 130 and the lining-coupled flange 190 of PE material using the hydraulic welding device 300, the operator is to face the flange 120 and the lining-coupled flange 190, the flange is bent The rubber packing 400 is installed on the front side of the flange 120 so that the rubber packing 400 for prevention is located. The rubber packing 400 is to prevent the lining-coupled flange 190 from being damaged by the applied pressure.

Thereafter, the operator attaches the pre-fabricated lining-coupled flange 190 to the prefabricated fusion-bonding pressure plate 340 to meet the same specifications as the end surface 137 of the lining 130 and lining as shown in FIG. 9 . After installing the heating device 200 between the 130 and the lining coupling type flange 190, it is heated.

After the heating is made, the heating device 200 is detached and the lining 130 and the lining are operated by operating the welding machine forward and backward traction jig 360 in the direction of the cross-section 137 of the lining 130 using the hydraulic welding device 300 . The coupling type flange 190 is fusion-bonded. When cooling for a predetermined time is completed, the traction jig 360 is moved backward to complete the fusion process.

For reference, after the fusion process, the operator may remove the bead protruding from the fusion portion of the flange 190 and the lining-coupled flange 190 using a bead remover while moving along the circumferential surface.

On the other hand, when the end surface 137 of the lining 130 and the end surface 192 of the lining coupling type flange 190 are fused through the fusion process, the lining 130 begins to shrink while cooling. When the lining 130 is contracted, the lining-coupled flange 190 fused to the end surface 137 of the lining 130 moves to the side of the old water supply pipe 110 in which the lining 130 is inserted, and thus the old water supply It is in close contact with the flange 120 joined or coupled to the pipe 110 .

If a foreign material such as a bead is formed or attached to the outer periphery of the fusion surface where the end surface 137 of the lining 130 and the end surface 192 of the lining-coupled flange 190 are fused, the lining ( 130) There may be a case where the lining-coupled flange 190 can no longer move toward the flange 120 due to the bead during contraction. In order to prevent this, the inner peripheral surface of one side of the through hole of the flange 120 coupled or joined to the old water supply pipe 110 is formed to have an inclined surface (A, about 45 degrees) extending outward as shown in FIG. 11 . desirable.

For reference, Figure 10a is a working photograph after the natural cooling process after the above-described fusion process, in which the lining coupling flange 190 is in close contact with the flange 120 joined or coupled to the old water supply pipe 110 state is indicated. As described above, the lining coupling type flange 190 is not formed with a bolt fastening hole.

Therefore, the worker forms bolt fastening holes in the lining-coupled flange 190 that is in close contact with the flange 120 joined or coupled to the aged water supply pipe 110 due to the contraction of the lining 130 , but is formed in the flange 120 . A bolt fastening hole is formed at each point facing the bolted fastening holes (perforation, step S230).

The reason for doing this is that when the bolt fastening hole is fused using the lining coupling type flange 190 formed in advance, the bolt fastening hole and the lining coupling type flange formed in the flange 120 due to deformation during contraction of the lining 130, etc. This is to prevent a problem that may occur because the bolt fastening hole formed at 190 is not located on the same line, that is, a problem in flange bonding with the deformed tube. Figure 10b shows the state of the lining coupling type flange 190 in which the bolt fastening holes are formed through step S230.

As described above, the worker who finished both ends of the lining 130 using the lining-coupled flange 190, as shown in FIG. ) side flange 120 and the flange on the side of the deformed pipe (500, for example, a single pipe finished pipe) side, and the regenerated water pipe 110 is interconnected to the adjacent pipe by flange coupling (S240 stage) using bolts and nuts (see Fig. 12).

Then, as shown in FIG. 12 , the operator connects the pipe connection joint pipe 510 by bolt bonding and the joint pipe 520 welding joint, and opens the main shut-off valve 530 to allow water to pass through. The air in the regenerated lining 130 may be discharged to the outside through the air valve 540 . After water passes, check for leaks and, if there is no problem, backfill with high-quality backfill material and restore the pavement to complete the entire process of the non-excavation rehabilitation method of the old water supply pipe according to the embodiment of the present invention.

According to the embodiment of the present invention described above, the present invention is by fitting a circular band on both ends of the lining 130 protruding out of the old water pipe 110, the lining protruding out of the old water pipe 110 ( 130) has the effect of preventing standard deformation due to thermal expansion,

Furthermore, by preventing specification deformation due to thermal expansion of the lining 130, the already standardized lining finishing member (lining coupling type flange) and the lining end can be aligned and joined more easily and quickly without additional processing or work. There is this.

In addition, the present invention is a lining-coupled flange to the flange 120 of the old water supply pipe 110 due to the shrinkage of the lining 130 after fusion-bonding the lining-coupled flange 190 to the lining end in which the bolt fastening hole is not formed. When the 190 is in close contact, since the bolt fastening hole is formed in the lining coupling type flange 190 to match the position of the bolt fastening hole formed in the flange 120 at that time, a general method using the lining coupling type flange in which the bolt fastening hole is formed. Compared to that, there is an advantage that can significantly reduce work defects and work time due to mismatch of bolt fasteners.

Furthermore, the present invention is formed due to the bead formed on the lining 130 by using the one of the inner peripheral surface of the through hole of the flange 120 coupled or joined to the old water supply pipe to have an inclined surface that extends outward. It eliminates problems and provides the effect of normal rehabilitation work.

In some cases, in the present invention, before cutting the old water pipe and constructing it, first, the old water pipe on both sides existing outside the range of the old water pipe to be rehabilitated is connected with a bypass pipe, and then rehabilitation work for the old water pipe to be rehabilitated. It has the advantage of being able to regenerate old water pipes normally without water outage.

Therefore, the old water pipe non-excavation rehabilitation method according to an embodiment of the present invention is more efficient and less defective than the previous methods, and above all, it can regenerate the old water pipe without a water outage. It can be said to be a useful invention that can minimize civil complaints, and it can also organize the pipe network for old water pipes that are not systematically managed.

The above has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims (11)

After cutting the old water pipe to be rehabilitated, and joining or bonding a flange having an inclined surface in which one inner circumferential surface of the through hole is extended outwardly to the end of the cut old water pipe, one end is attached to the inner surface of the old water pipe and The other end of the step of installing a guide frame for protecting the lining is bolted to the flange;
inserting a lining into the old water pipe to which the flange is joined or combined, and inserting the lining to protrude from both ends of the old water pipe;
Fitting a circular band having locking rings used as handles on the outer circumferential surface to limit expansion due to thermal expansion to both ends of the protruding part of the lining;
restoring the original shape by first heating and pressing the lining, and second heat and pressurizing the lining after coupling the sealers to both ends of the lining to bring the lining into close contact with the inner peripheral surface of the old water supply pipe;
cutting the protruding lining after removing the circular band and the obturator;
Inserting and installing a circular maintenance regulator for maintaining the original shape of the lining inside each of both ends of the cut lining;
a step of fusing one end surface of a lining-coupled flange having a ring-type shape having a through hole formed in the center but not having a bolt fastening hole formed in the flange portion to be coupled with the flange to each end of the lining cut;
Bolt fastening holes are formed in the flange portion of the lining coupled flange that is in close contact with the flange joined or coupled to the old water supply pipe due to the shrinkage of the lining, and bolted at each point facing the bolt fastening holes formed in the flange. forming a ball;
Non-excavation rehabilitation method for old water pipe, characterized in that it comprises a; the lining coupling type flange facing the flange of the old water supply pipe and the deformed pipe side flange in close contact with each other. delete Digging a work area at a point where an old water supply pipe to be rehabilitated is located and installing necessary temporary facilities;
Connecting the old water pipes on both sides that exist outside the range of the old water pipes to be rehabilitated to a bypass pipe to implement uninterrupted water during the time for rehabilitating the old water pipes;
Cutting the old water pipe to be rehabilitated;
After joining or bonding a flange having an inclined surface on which one inner circumferential surface of the through hole is extended outwardly to the end of the cut old water supply pipe, one end is attached to the inner surface of the old water pipe and the other end is bolted to the flange. installing a guide frame;
inserting a lining into the old water pipe to which the flange is joined or combined, and inserting the lining to protrude from both ends of the old water pipe;
Fitting a circular band having locking rings used as handles on the outer circumferential surface to limit expansion due to thermal expansion to both ends of the protruding part of the lining;
restoring the original shape by first heating and pressing the lining, and second heat and pressurizing the lining after coupling the sealers to both ends of the lining to bring the lining into close contact with the inner peripheral surface of the old water supply pipe;
cutting the protruding lining after removing the circular band and the obturator;
Inserting and installing a circular maintenance regulator for maintaining the original shape of the lining inside each of both ends of the cut lining;
a step of fusing one end surface of a lining-coupled flange having a ring-type shape having a through hole formed in the center but not having a bolt fastening hole formed in the flange portion to be coupled with the flange to each end of the lining cut;
Bolt fastening holes are formed in the flange portion of the lining coupled flange that is in close contact with the flange joined or coupled to the old water supply pipe due to the shrinkage of the lining, and bolted at each point facing the bolt fastening holes formed in the flange. forming a ball;
Non-excavation rehabilitation method for old water pipe, characterized in that it comprises a; the lining coupling type flange facing the flange of the old water supply pipe and the deformed pipe side flange in close contact with each other. delete delete The method according to claim 1 or 3, wherein the circular band is spaced apart from the flange by a predetermined distance in consideration of the length contracted in the process of cooling the heated lining, but the distance from the flange is adjusted according to the thickness of the lining. A non-excavation rehabilitation method for old water pipes, characterized in that they are set differently. The method according to claim 1 or 3, wherein a rubber packing for preventing flange bending is located between the flange to be faced in the step of fusing the flange and the lining-coupled flange and the lining-coupled flange to prevent the flange from bending. A non-excavating rehabilitation method for old water pipes characterized by installing rubber packings. delete delete delete delete

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