KR20220148068A - Method and apparatus a deteriorating piping of medium and high pressure - Google Patents

Abstract

In accordance with a purpose of the present invention, the whole deteriorated pipeline is reinforced and repaired through a non-excavating method without repairing a part of the pipeline, thereby shortening time for repairing a deteriorated pipe as well as improving convenience and ease in repair work, which can lead to the minimization of direct and indirect economic losses. To achieve the purpose, the present invention comprises: a repair section selection step of selecting a deteriorated pipeline to be reinforced or repaired; an excavation step of excavating each of both ends of the repair section selected through the repair section selection step such that a part of the deteriorated pipe and a deteriorated pipe flange are exposed; an installation step of, when the deteriorated pipe and the deteriorated pipe flange are exposed by the excavation of each of both ends through the excavation step, installing a providing unit and a withdrawal unit at both ends, respectively; a reinforcement expansion pipe installation step of, when the providing unit and the withdrawal unit are completely installed at both ends of the excavated part through the installation step for the providing unit and the withdrawal unit, respectively, providing the reinforcement expansion pipe through the providing unit, and leading the reinforcement expansion pipe to be inserted into the deteriorated pipe through a withdrawal force of the withdrawal unit; and a finishing step of, when the reinforcement expansion pipe is completely inserted into the deteriorated pipe through the reinforcement expansion pipe installation step, fixing the reinforcement expansion pipe to each of both ends of the deteriorated pipe, and then, connecting the deteriorated pipe which has been separated, thereby completing the non-excavating reinforcement and repair work on the deteriorated pipe.

Description

A method and apparatus for repairing old and old pipes for medium and high pressure

The present invention relates to a method and apparatus for repairing old pipes for medium and high pressure, and more particularly, by performing reinforcement and repair work on the entire old pipe line in a non-excavating method without performing repair on some of the pipe lines, It relates to a method and apparatus for repairing old and medium-pressure pipes that minimize direct and indirect economic loss by shortening repair work time and improving convenience and ease of repair work.

A pipeline is a pipe through which a fluid such as water or gas flows, and includes a water supply pipe, a sewage pipe, a gas pipe, and an oil pipe.

Corrosion occurs when the pipe is used for a certain period of time, and foreign substances such as rust are discharged into the fluid flowing along the pipe by such corrosion. It also causes a problem that the pipeline may burst.

In addition, there is a problem that the inner wall may be cracked or damaged as time passes by the vibration of a vehicle that is buried underground and travels on the road.

In addition, when the pipeline is damaged, water leakage occurs due to the breakage, increasing soil contamination, contamination of groundwater quality, and foreign substances such as soil and soil are introduced into the damaged part to contaminate the fluid in the pipeline.

Therefore, there is a need to replace or reinforce the old pipe with a new pipe.

However, in order to repair the conventional old pipe, first, the location to be repaired is selected, the repair work is performed to replace the old pipe after excavating in the selected part, and when the repair work is completed, the work such as to perform the re-buried work In addition to the direct economic damage that increases the cost of repair due to the complexity of the maintenance work, the addition of work period and the input of a lot of manpower, the traffic congestion in the vicinity during the repair work and the risk of safety accidents caused by this, etc. There is a problem that indirect damage is caused.

In addition, since the conventional repair of old pipes is limited to simple emergency treatment as only partial parts of pipes of several hundred m to several kilometers are repaired, the maintenance work is continuously performed after the service life of the buried pipe has passed. There is a problem that there is no choice but to do it, and because of this, there is a problem that the original old pipe repair method is not provided.

Republic of Korea Patent Publication No. 10-1980693 (2019.05.22. Announcement) Republic of Korea Patent Publication No. 10-2058005 (2019.12.20. Announcement)

As proposed in order to solve the above problems, an object of the present invention is to reinforce and repair the entire old pipe line in a non-excavating manner, without performing repair on some of the pipe lines, thereby repairing old pipes. An object of the present invention is to provide a method and apparatus for repairing old and medium-pressure pipes that minimize direct and indirect economic loss by reducing time and improving convenience and ease of repair work.

The present invention for achieving the above object, a repair section selection step of selecting an old pipe line to be reinforced and repaired among the pipeline lines; an excavation step of excavating each of both ends of the maintenance section selected through the repair section selection step so that a part of the old pipe and the old pipe flange are exposed; When the old pipe and the old pipe flange are exposed by excavation at both ends through the excavation step, an installation step of installing a supply unit and a draw-out unit at both ends; When the installation of the providing part and the withdrawing part is completed on one side of the excavated part through the providing part and the withdrawing part installation step, the providing part provides a reinforcing expansion and contraction pipe, and the reinforcing expansion and contraction pipe is an aged pipe by the pull-out force of the extraction part Reinforcing expansion and contraction pipe installation step to enter the interior of the; And when the entry of the reinforcing expansion and contraction pipe into the old pipe is completed through the reinforcing expansion and contraction pipe installation step, the old pipe is reinforced and repaired in a non-excavation method by fixing the reinforcement expansion pipe at each end of the old pipe and then connecting the separated old pipe A finishing step to complete the work; characterized in that it consists of.

In the present invention, the finishing step, the first expansion flange fixing step to fix one end of the first expansion flange to the aging pipe flange of the old pipe; When the fixing of the first expansion flange to one end of the old pipe is completed through the expansion and contraction flange fixing step, a gripping wing forming step of cutting so that a gripping blade is formed in which only a part of the reinforcing expansion and contraction pipe extended by a certain length from the first expansion flange is formed; ; When the formation of the gripping wings on one end of the reinforcing expansion and contraction pipe is completed through the gripping blade forming step, inserting the second expansion flange so that one end of the second expansion flange is inserted into the reinforcing expansion and contraction tube while the gripping wings are fixed step; And when one end of the reinforcing expansion pipe is configured between the first and second expansion flanges through the second expansion flange insertion step, the filler is injected at a constant pressure into the injection hole configured on one side of the first expansion flange. It is preferable to consist of a filling step of firmly fixing one end of the reinforcing expansion pipe to the first and second expansion and contraction flanges by curing the filler.

The present invention selects an old pipe line to be reinforced among the pipeline lines of medium and high pressure, and inserts a reinforcing expansion and contraction pipe inside the old pipe of the selected section, and then fixing one end of the old pipe and one end of the reinforcing expansion pipe. An apparatus for repairing an old pipe, comprising: a reinforcing expansion pipe that enters the inside of the old pipe, maintains a state protruding a certain length from one end of the old pipe, and cuts a part of one end to form at least one gripping blade; A first flange part is fixed to the old pipe flange configured at one end of the old pipe part, a first boss extending a certain length is formed at the other end of the first flange part, and the filler is injected into the inside at one side of the first boss. a first expansion flange having at least one injection hole formed therein; A second flange part is formed at one end to support the flange of the other old pipe to be fixed, and the other end of the second flange part is extended by a predetermined length and is inserted into the reinforcing expansion and contraction pipe, so that the outside of the reinforcing expansion and contraction pipe is the first expansion and contraction a second expansion flange supported by the first boss of the flange and including a second boss supporting the inner side; and a filler injected into the injection hole of the first expansion flange to support one end of the reinforcing expansion pipe configured between the first and second expansion flanges to maintain a firmly fixed state.

In the present invention, the reinforcing expansion and contraction pipe, a fibrous body; It is preferable to include; an inner and an outer body configured to protect the fiber body by applying a predetermined thickness to each of both ends of the fiber body.

In the present invention, on the inner surface of the first boss of the first expansion flange, the fixing force by pressing the reinforcing expansion tube positioned inside the first boss while being bent by the injection pressure of the filler injected through the injection hole It is preferable to include; a thin finish plate to be improved.

In the present invention, the second boss of the second expansion flange is formed to have a certain depth on one side and is positioned inside the reinforcing expansion pipe by the injection pressure of the filler injected through the injection hole of the first expansion flange. It is preferable to include; a seating groove for supporting the fixing force to be improved by expanding the contact area in close contact with the outer periphery of the two bosses.

According to the present invention, without performing repairs on some of the piping lines, by reinforcing and repairing the entire old pipe line in a non-excavating method, the repair work time of the old pipe is shortened and the convenience and ease of the repair work are improved. It has the effect of minimizing direct and indirect economic losses.

1 is a view schematically showing a repair method according to the present invention.
Figure 2 is a process diagram of an old pipe repair method according to the present invention.
Figure 3 is a process diagram of the finishing step according to the present invention.
4 is a separate configuration diagram of the finishing structure according to the repair method according to the present invention.
5 is a perspective view of a reinforcing expansion and contraction pipe according to the present invention.
6 is a view of the first expansion flange according to the present invention, 6a is an exploded perspective view, 6b is a combined cross-sectional view.
7 is a cross-sectional view of the second expansion flange according to the present invention.
Figure 8a is a view showing the coupling relationship of the reinforcing expansion pipe by the first and second expansion flanges according to the present invention, before inserting the second expansion flange.
FIG. 8b is a diagram illustrating a coupling relationship between the reinforcing expansion and contraction pipes by the first and second expansion and contraction flanges according to the present invention, and is a view showing a state in which the second expansion and contraction flanges are actually inserted and then filled.

A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the embodiment of the present invention, the old pipe repair method for medium and high pressure does not perform repair on some of the medium and high pressure pipe lines, but reinforces and repairs the entire old pipe line in a non-excavation method, thereby reducing the repair work time of the old pipe It also minimizes direct and indirect economic loss by improving the convenience and ease of maintenance work.

The repair method according to an embodiment of the present invention is a suitable repair method for a medium-pressure pipe in which a fluid such as water, gas, oil, etc. is transferred through a pipe at a pressure (medium or high pressure) above a certain level.

That is, the old pipe repair method for medium and high pressure, as shown in FIG. 1, inserts a flexible reinforcing expansion and contraction pipe into the buried old pipe (hereinafter referred to as 'old pipe') to repair the entire old pipe And the reinforcement process is performed, and the service life of the old pipe is greatly improved by the reinforcing expansion and contraction pipe, so that reinforcement and repair efficiency compared to the part-by-part repair and reinforcement method that performs repair and reinforcement for each damaged part as in the prior art to improve

In addition, as the reinforcing expansion and contraction pipe used in the repair method is configured to be flexible, as shown in FIG. 1 , the reinforcing expansion and contraction pipe is smoothly inserted into the inside of the old pipe in a non-excavating method even for the curved part of the old pipe depending on the topography By doing this, reinforcement and repair work is performed regardless of the structure of the old pipe.

As shown in FIG. 2, the method for repairing old and high-pressure pipes for medium and high pressure includes a repair section selection step (S1), an excavation step (S2), a supply unit and a lead-out unit installation step (S3), and a reinforcement expansion pipe installation step ( S4), and a finishing step (S5).

In the repair section selection step (S1), an old pipe line to be repaired is selected.

In this case, the old pipe (1) can be reinforced and repaired in a non-excavating type of the entire old pipe line for which the service life has been exceeded.

In addition, the selection of the old pipe is a length that can provide a reinforcing expansion and contraction pipe, for example, it is suitable for reinforcing and repairing a long distance such as several hundred m to several km at once, and both ends of the old pipe, that is, a part with a flange to select

The excavation step (S2) excavates the both ends selected through the repair section selection step (S1) to a predetermined width and depth so that the aged pipe flange 2 part of the old pipe 1 is exposed.

When the excavation for both ends of the old pipe is completed through the excavation step (S2) in the providing unit and the withdrawing unit installation step (S3), the providing unit 10 and the withdrawing unit 20 are installed at both ends of the excavated section, respectively.

The providing unit 10 includes a drum in which the reinforcing expansion and contraction pipe 30 is wound in a roll manner, and performs a function of smoothly supplying the reinforcing expansion and contraction pipe 30 to the inside of the old pipe 1 .

The withdrawing unit 20 is a function of providing a pulling force for pulling the reinforcing expansion and contraction pipe 30 provided by the providing unit 10 so that the reinforcing expansion and contraction pipe 30 provided by the providing unit 10 can enter the inside of the old pipe 1 . carry out

That is, as the pull-out force of the withdrawing unit 20 is provided to the providing unit 10 , the reinforcing expansion pipe 30 wound around the providing unit 10 is forcibly drawn out from one end of the old pipe 1 to the other end. This is made so that the reinforcing expansion and contraction pipe 30 can be inserted into the inside of the old pipe 1 .

In the reinforcing expansion pipe installation step (S4), when the installation of the providing unit 10 and the withdrawing unit 20 at each end of the maintenance section is completed through the providing unit and the withdrawing unit installation step (S3), the providing unit 10 ) to provide the reinforcing expansion and contraction pipe 30, and as the withdrawing force is provided from the lead-out part 20, the supply part 10 and the lead-out part 20 interact with each other to the inside of the old pipe (1). A reinforcing expansion tube 30 is configured.

In addition, the reinforcing expansion and contraction pipe 30 is formed of a flexible material, so that even if a curved portion of the old pipe 1 into which the reinforcement and expansion pipe 30 is inserted is located, the flexible reinforcing expansion pipe 30 is flexible. The insertion is made smoothly even in the curved portion of the old pipe (1).

In this case, as shown in FIG. 5 , the reinforcing expansion and contraction pipe 30 is formed in a triple structure so as to have responsiveness to the pressure acting on the inside of the pipe.

That is, the reinforcing expansion and contraction pipe 30 is composed of an inner body 320 and an outer body 330 that are coated on the inside and the outside around the fiber body 310 .

As the fiber body 310 is made of fibers, the tensile strength is further improved.

The fibrous body 310 is preferably Kevlar which has toughness enough to be used as a bulletproof material. For reference, 'Kevlar' is the brand name of DuPont's aramid material in the United States.

Since the Kevlar has a hydrocarbon structure, it is much lighter than metal materials with a large atomic weight, is very tough and strong with a tensile strength of 3,500 Mpa or more, and has thermal stability even at 300° C. or higher, and has chemical resistance.

Of course, it is not limited thereto, and the fiber body 310 is configured between the inner and outer bodies 320 and 330 , and any material capable of improving the tensile strength of the reinforcing expansion pipe 30 may be used. can be hired For example, glass fiber, carbon fiber, palm fiber, and the like.

The inner and outer bodies 320 and 330 are formed to have a predetermined thickness on the inside and outside of the fiber body 310, and support the fluid to flow smoothly therein and prevent the fiber body 310 from being damaged. to prevent In this case, the inner and outer bodies 320 and 330 are synthetic resins, that is, PE. Of course, the present invention is not limited thereto, and any material that protects the fibrous body 310 and provides stability that does not interfere with the flow of the fluid flowing inside and does not perform chemical interference may be employed.

In addition, the inner and outer bodies 320 and 330 are not limited to being formed of the same material, but are formed of different materials depending on the purpose or environment of use. For example, the inner body 320 is made of polyurethane, and the outer body 330 is made of PE.

For reference, PE has excellent mechanical performance, moisture resistance, moisture resistance, cold resistance, chemical resistance, electrical insulation, and good moldability, so it is used outside of the fiber body 310 to exhibit the protective performance of the fiber body 310 .

Polyurethane ensures stable transport regardless of the composition of the fluid due to its excellent elasticity and resistance to chemicals.

In the closing step (S5), when the insertion of the reinforcing expansion pipe 30 into the inside of the old pipe 1 is completed through the reinforcing expansion pipe installation step S4, the old pipe flange 12 configured at the end of the old pipe 1 ) by fixing the end of the reinforcing expansion and contraction pipe 30 to the reinforcing expansion and contraction pipe 30, when the repair and reinforcement of the old pipe 1 are completed, the separated old pipe lines are interconnected. make sure the line is maintained.

The closing step (S5) is, as shown in FIG. 3, a first expansion flange fixing step (S51), a gripping wing forming step (S52), a second expansion flange insertion step (S53), and a charging step (S54) ) is made of

The first expansion flange fixing step (S51) is to fix the first expansion flange 40 to the aging pipe flange 12 configured at the end of the old pipe (1).

As shown in FIG. 6 , the first expansion flange 40 is configured with a first flange portion 410 to be fixed to the aging pipe flange 12 by means of fastening means such as bolts and nuts.

In addition, a first boss 420 formed with a predetermined length at the other end of the first flange portion 410 is configured.

The first boss 420 is extended by a predetermined length from the first flange portion 410, intermittently the insertion depth of the second expansion flange 50 at the end, and the fixing force for the reinforcing expansion pipe 30 is exhibited. support to be

In addition, a receiving groove 422 having a predetermined depth is formed on the inner surface of the first boss 420 .

The receiving groove 422 induces one end of the reinforcing expansion pipe 30 to be firmly fixed between the first and second expansion flanges 40 and 50 as a filler to be described later is accommodated.

In addition, at least one injection hole 424 is formed at one side of the first boss 420 so that the filler injected at high pressure from the outside can be accommodated in the receiving groove 422 .

The injection hole 424 is configured on one side of the first boss 420 , and is formed to penetrate through the receiving groove 422 so that the filler injected from the outside is accommodated in the receiving groove 422 .

In addition, a thin finishing plate 430 for supporting the receiving groove 422 to close is configured on the inner surface of the first boss 420 .

The thin finishing plate 430 is configured to be in close contact with the inner surface of the first boss 420 , and supports to close the open end of the receiving groove 422 .

In this case, the thin finishing plate 430 is configured to be firmly fixed to the first boss 420 by a fixing method such as welding. Of course, the present invention is not limited thereto, and any fixing method that allows the thin finishing plate 430 to be firmly fixed to the first boss 420 may be employed. For example, they may be mutually fastened by a screw method, or may be fixed with a direct screw or rivet.

In addition, the thin finish plate 430 is bent by the pressure of the filler injected through the injection hole 424 and is formed to be flexible so that it can exert a firm fixing force by pressing the reinforcing expansion tube 30 . For example, the finishing thin plate 430 is formed of a metal or synthetic resin.

In the gripping wing forming step (S52), when the fixing of the first expansion flange 40 to the old pipe flange 12 is completed through the first expansion flange fixing step (S51), it enters the old pipe (1), and the first A portion of the reinforcing expansion and contraction tube 30 exposed in the expansion flange 40 is cut so that at least one gripping blade 340 is formed.

That is, as shown in FIGS. 3 and 4 , when the reinforcing expansion and contraction pipe 30 is configured to be exposed at a predetermined length from the first expansion and contraction flange 40 , the reinforcing expansion and contraction pipe 30 is cut to protrude only a part of the operator At least one or more gripping wings 340 for easy gripping are formed.

The gripping wing 340 is configured in a shape extending from the reinforcing expansion and contraction pipe 30, and when inserting a second expansion flange 50 to be described later, by preventing it from entering together with the second expansion flange 50, One end of the reinforcing expandable pipe 30 is maintained in a state stably positioned between the first and second expansion and contraction flanges 40 and 50 .

In addition, as described above, when one end of the reinforcing expansion and contraction pipe 30 is positioned between the first and second expansion and contraction flanges 40 and 50 , the gripping wing 340 is cut and removed. Of course, the present invention is not limited thereto, and the gripping wing 340 may be left without cutting and removing.

In the second expansion flange insertion step (S53), when the formation of the gripping wings 340 on one end of the reinforcing expansion and contraction pipe 30 is completed through the gripping blade forming step (S52), the operator grips the gripping wings 340. By inserting the second expansion flange 50 in the state, one end of the reinforcing expansion pipe 30 is positioned between the first and second expansion flanges 40 and 50 .

As shown in FIG. 7 , the second expansion flange 50 includes a second flange part 510 that supports the flange 12 of the old pipe 1 located on the other side at one end to be fixed.

At one end of the second flange part 510 , a second boss 520 is configured to extend a predetermined length and to be inserted into the reinforcing expansion and contraction pipe 30 .

The second boss 520 is extended by a predetermined length from one end of the second flange portion 510 to support the inside of one end of the reinforcing expansion tube 30 .

In addition, a seating groove 522 having a predetermined depth is formed on one side of the second boss 520 .

The seating groove 522 is formed to be recessed to a predetermined depth from the outer circumferential surface of one side of the second boss 520, and by expanding the contact area to which one end of the reinforcing expansion pipe 30 is in close contact with the filling pressure of the filler, reinforcement expansion and contraction The fixing force for the tube 30 is amplified. In this case, the seating groove 522 is preferably formed at a position corresponding to the receiving groove 422 formed in the first boss 420 of the first expansion flange 40 .

Of course, the present invention is not limited thereto, and the seating groove 522 may be omitted.

That is, as shown in FIG. 8A , the second expansion and contraction pipe 30 is secured so that the second boss 520 is inserted into the reinforcing expansion pipe 30 in a state in which the extended gripping wings 340 are fixed. By positioning the flange 50, one end of the reinforcing expansion pipe 30 is configured between the first and second bosses 420 and 520 of the first and second expansion flanges 40 and 50.

In this case, the gripping wing 340 maintains a fixed state as the operator grips as described above. Of course, it is not limited thereto, and the gripping wing 340 is not directly gripped by the operator, but can be fixed using a separate fixing means, and when the second expansion flange 50 is inserted, the reinforcing expansion and contraction pipe ( 30) can be used as long as they can be prevented from being inserted together.

In the filling step (S54), when the insertion of the second expansion flange 50 is completed through the second expansion flange insertion step (S53), the filler is injected into the injection hole 424 of the first expansion flange 40, One end of the reinforcing expandable pipe 30 is firmly fixed between the first and second expandable flanges 40 and 50 by the filler.

That is, as shown in Figure 8b, when the filler is injected through the injection hole 424 configured on one side of the first boss 420 of the first expansion flange 40, the first boss ( While being accommodated in the receiving groove 422 of the 420 , the thin finishing plate 430 is bent by the injection pressure acting on the thin finishing plate 430 configured on the inner circumferential surface of the first boss 420 .

At this time, the finished thin plate 430 bent by the injection pressure of the filler acts as the reinforcing expansion pipe 30 and the second expansion flange 50 configured inside the first expansion flange 40, so that the second expansion flange The seating groove 522 formed in the second boss 520 of (50) maintains a state in which one end of the reinforcing expansion pipe 30 and the thin finishing plate 430 are seated.

In this case, as the seating groove 522 is recessed to a predetermined depth from the second boss 520 , the contact area in close contact with the second boss 520 of the second expansion flange 50 is enlarged. The fixing force of the reinforcing expansion pipe 30 is further improved.

On the other hand, the filler is made of a composition having an adhesive property. That is, when the injection hole 424 is injected into the first expansion flange 40, the filling material is cured after a certain time has elapsed, and thus is filled in the receiving groove 422 of the first boss 420 . At the same time, the finished thin plate 430 is cured while seated in the seating groove 522 of the one end of the reinforcing expansion and contraction pipe 30 and the second boss 520 by the injection pressure, thereby exhibiting a firm fixing force.

Therefore, as in the prior art, instead of performing reinforcement and repair work for each specific part of the old pipe line, the entire line of the old pipe is integrated into one reinforcing expansion pipe, and the flow rate or pressure of the fluid through the old pipe is interfered with. By making the fluid flow without it, it is possible to obtain the secondary effect of improving the efficiency of reinforcement and repair work for old pipes and improving the smooth flow of the fluid.

What has been described above is only one embodiment for implementing a method and apparatus for repairing old and high pressure pipes, and the present invention is not limited to the above-described embodiment. Those of ordinary skill in the art to which the present invention pertains will understand that various modifications can be made without departing from the gist of the present invention.

10: providing unit 20: withdrawing unit
30: reinforcing expansion tube 310: fibrous body
320: inner body 330: outer body
40: first expansion flange 410: first flange portion
420: first boss 422: receiving home
424: injection hole 430: finish thin plate
50: second expansion flange 510: second flange part
520: second boss 522: seating home

Claims (6)

a repair section selection step of selecting a line of old piping to be reinforced or repaired;
an excavation step of excavating each of both ends of the maintenance section selected through the repair section selection step so that a part of the old pipe and the old pipe flange are exposed;
When the old pipe and the old pipe flange are exposed by the excavation of both ends through the excavation step, an installation step of installing a supply unit and a lead-out unit at each of both ends;
When the installation of the providing part and the withdrawing part at both ends of the excavated part through the providing part and the withdrawing part installation step is completed, the providing part provides a reinforcing expansion and contraction pipe, and the reinforcing expansion and contraction pipe is formed by the pulling power of the drawing part Reinforcing expansion and contraction pipe installation step of entering to be inserted into the inside of the old pipe; and
When the insertion of the reinforcing expansion and contraction pipe into the old pipe is completed through the reinforcing expansion and contraction pipe installation step, the old pipe is non-excavated by fixing the reinforcement expansion pipe at each end of the old pipe and then connecting the separated old pipe. a finishing step to complete reinforcement and repair work in this way;
A method of repairing old pipes for medium and high pressure, characterized in that consisting of
According to claim 1, wherein the closing step,
A first expansion flange fixing step of fixing one end of the first expansion flange to the aging pipe flange of the old pipe;
When the fixing of the first expansion flange to one end of the aging pipe is completed through the expansion and contraction flange fixing step, the gripping wing forming step of cutting so that only a part of the reinforcing expansion and contraction pipe extending a certain length from the first expansion flange is formed to form a gripping blade Wow;
When the formation of the gripping wings on one end of the reinforcing expansion and contraction pipe is completed through the gripping blade forming step, inserting the second expansion flange so that one end of the second expansion flange is inserted into the reinforcing expansion and contraction tube while the gripping wings are fixed step; and
When one end of the reinforcing expansion pipe is configured between the first and second expansion flanges through the second expansion flange insertion step, the filling material is injected as a constant pressure is injected into the injection hole configured on one side of the first expansion flange. a filling step of firmly fixing one end of the reinforcing expansion and contraction pipe to the first and second expansion and contraction flanges by curing of;
A method of repairing old pipes for medium and high pressure, characterized in that consisting of
Select an old pipe line to be repaired or reinforced, insert a reinforcing expansion pipe inside the old pipe of the selected section, and then fix one end of the old pipe and one end of the reinforcing expansion pipe to the old pipe repair device for medium and high pressure. in,
a reinforcing expansion pipe that enters the inside of the old pipe, maintains a state protruding a certain length from one end of the old pipe, and cuts a part of one end to form at least one gripping blade;
A first flange portion is fixed to an aged pipe flange configured at one end of the aged pipe, a first boss extending a certain length is formed at the other end of the first flange portion, and a filler is injected into one side of the first boss. a first expansion flange having at least one injection hole formed therein;
A second flange part is formed at one end to support the flange of the other old pipe to be fixed, and the other end of the second flange part is extended by a predetermined length and inserted into the reinforcing expansion and contraction pipe, so that the outside of the reinforcing expansion and contraction pipe is the first expansion and contraction a second expansion flange supported by the first boss of the flange and including a second boss supporting the inner side; and
a filler injected into the injection hole of the first expansion flange to support one end of the reinforcing expansion pipe configured between the first and second expansion flanges to maintain a firmly fixed state;
Old pipe repair device for medium and high pressure, characterized in that it comprises a.
According to claim 3, The reinforcing expansion pipe,
a fibrous body;
an inner and outer body configured to be applied to both ends of the fibrous body to a predetermined thickness to protect the fibrous body;
Old pipe repair device for medium and high pressure, characterized in that it comprises a.
According to claim 3, The inner surface of the first boss of the first expansion flange,
Finishing thin plate to improve fixing force as it is bent by the injection pressure of the filler injected through the injection hole and presses the reinforcing expansion tube located inside the first boss;
Old pipe repair device for medium and high pressure, characterized in that it comprises a.
According to claim 3, The second boss of the second expansion flange,
It is formed to have a certain depth on one side and by the injection pressure of the filler injected through the injection hole of the first expansion and contraction flange, the area of close contact with the outer periphery of the second boss located inside the reinforcing expansion tube is enlarged to increase the fixing force. Aged pipe finishing structure for medium and high pressure, characterized in that it includes; a seating groove to support it to be improved.

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