KR100606188B1 - Polyethylene pi p e rehabilitation - Google Patents

Abstract

The present invention relates to a non-excavation PE lining rehabilitation method of the old water pipes, to solve the problems such as the occurrence of road congestion and replacement time and costs are consumed in the replacement and repair process of old water pipes.

That is, the present invention by folding the polyethylene pipe to form a liner to be transported around the bush, to build a work tool on both ends of a certain length in the old water pipe replacement zone, and remove the scale inside the water pipe from the work tool and In addition, the washing with high pressure water is repeated, the unmanned camera is inserted to identify the position of the branch line of the damaged part, and then the folded liner is introduced into the old water pipe, and both ends of the liner are blocked with steam shoes and the steam and high pressure air are After inflation and close contact with the water pipe through the injection, the installation is completed by installing the branch pipe liner at the position identified by the unmanned camera, connecting the cut water pipe and refilling the excavation site.

Therefore, the present invention is to repair the old water pipes, not the whole excavation of the repair section, rather than partial excavation, so as not to cause road congestion, the maintenance period and cost are minimized, the life span of the water pipes is increased, and the water quality and quantity are significantly improved .

Water pipe

Description

Non-excavation PE lining rehabilitation method of old water pipe {POLYETHYLENE PIPI EHABILITATION}

1 is an exemplary view showing a liner folding rolling process according to the present invention.

Figure 2 is an exemplary view showing a work tool construction process according to the present invention.

3 is an exemplary view showing a cleaning process according to the present invention.

4 is an exemplary view showing a photographing process according to the present invention.

5 is an exemplary view showing a liner installation process according to the present invention.

6 is an exemplary view showing a liner expansion process according to the present invention.

7 is an exemplary view showing a branch pipe installation process according to the present invention.

8 is an exemplary view showing a pipe connection process after rehabilitation according to the present invention.

9 is an exemplary view showing an expansion fixing process according to the present invention.

10 is an exemplary view showing a curved portion wrinkle removal process according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: liner

11 branch pipe liner 12 liner flange portion 13 corrugated portion

20: water pipe 21: eggplant pipe

30: working tool

40: high pressure cleaner 41: scraper

51: unmanned camera 52: high-pressure washing car

53: winch 54: pressure regulator

55: shooting vehicle 56: mobile rehabilitation plant fleet

60a, 60b: Steam Shoes

61: main pipe 62: condensate drain pipe

70: spool

80: expansion prevention 81: stainless ring 82: fixing key

91: heating port 92: expansion pressure tube

100: folding rolling process

110: folding step 120: taping step 130: winding step

210: Work Tool Excavation Process

220: cleaning process

221: scraping process 222: high pressure cleaning process

230: Shooting process

240: liner installation process

241: binding flange forming process 242: liner drawing process

243: steam shoe installation process

250: liner expansion process

251 liner heating expansion process 252 condensate drainage process

253: liner contact process 254: cooling process

255: flange forming process

260: branch pipe installation process 270: after rehabilitation pipe connection process

310: expansion fixing process

320: wrinkled wrinkle removal process

321: heating the wrinkle portion 322: crimping process

323: Wrinkle removal process

The present invention relates to a non-excavation PE lining rehabilitation method of old water pipes, and more specifically, to prevent rust and water leakage by covering the polyethylene liner inside without digging all old water pipes, traffic congestion due to replacement of water pipes It aims to minimize the cost and time for repairing old water pipes and to drastically improve the quality and flow rate of tap water without causing road excavation.

Generally, water pipes use cast iron pipes and steel or cement pipes.

On the other hand, the water pipes as described above are used for a certain period of time, the corrosion occurs due to rust, and the tube diameter is narrowed due to rust nodules, the flow rate is reduced, so after a certain period must be replaced with a new water pipe.

As described above, the replacement of the old water pipes is carried out by excavating the road, removing the existing water pipes, and embedding new water pipes.

However, in the work for replacing the old water pipes as described above, most of the buried areas of the water pipes are roads, resulting in traffic congestion in the excavation process for replacement, and it takes a lot of time and money for replacement. There was a problem that the economic loss and lifespan due to leakage of water pipe fittings is also shortened.

Thus, the present invention is to solve the problems such as the induction of road congestion and replacement time and cost that occur in the replacement and repair process of the old water pipe as described above.

That is, according to the present invention, the polyethylene pipe is folded and wrapped in a bush and processed into a liner so as to be transported, a work tool is constructed at both ends of the old water pipe replacement zone, and the scale of the water pipe is removed from the work tool. Repeat the cleaning process, insert the unmanned camera to find the damaged part and the position of branch pipe, and then insert the folded liner into the old water pipe, block both ends of the liner with steam shoes and inject steam and high pressure air. The construction is completed by cooling and curing the inside of the liner that is in close contact with the water pipe through the installation, by installing the branch pipe liner at the position identified by the unmanned camera, connecting the cut water pipe, and laying the excavation site.

Therefore, the present invention does not cause the overall excavation of the repair section in the repair of the old water pipes without causing congestion of road traffic, and the repair period and cost are minimized. The quantity is improved drastically as pipes and pipes disappear after repair.

Hereinafter, described in detail by the accompanying drawings as follows.

The present invention is to minimize the construction period and cost and to significantly improve the water quality and quantity by performing a partial excavation in the repair of old water pipes without digging the repair section as a whole, a polyethylene liner formed of a pipe ( A liner folding rolling process (100) for folding the spool (70) in half so as to draw and transport the water into the water pipe (20);

A work tool construction process 210 for excavating a road and cutting a water pipe so as to form a work tool 30 for rehabilitation work at both ends of the rehabilitation section of the old water pipe 20;

A water pipe cleaning step (220) for introducing a high pressure cleaner (40) having a scraper (41) into the water pipe (20) to repeat the removal of the scale and the high pressure cleaning;

Shooting process 230 to determine the location of the damaged portion and the branch pipe 21 by inputting the unmanned camera 51 connected to the ground-mounted vehicle 55 to the water pipe 20, the cleaning is completed through the cleaning process 220 )and;

A liner installation process 240 for coupling the coupling flange 22 to both ends of the water pipe 20 and introducing the folded liner 10 and installing steam shoes 60a and 60b for injection of steam at both ends;

Liner expansion that expands and closes the liner 10 to the water pipe 20 through sequential supply of hot steam, high pressure air, and cooling air through the steam shoes 60a to the liner introduced through the liner installation process 240. Step 250;

A branch pipe installation step 260 for installing a branch pipe liner 11 of a “T” type at a position of the branch pipe taken through the photographing step 230;

After the rehabilitation pipe connection process 270 after the excavation site is buried after connecting the cut water pipe with the existing water pipe.

On the other hand, in the above step, the photographing step 230 performed before the rehabilitation is selectively performed as necessary after the rehabilitation.

In addition, the steam shoes (60a, 60b) is a cylindrical tube of which one side is sealed is provided with a main pipe 61 having a valve for the injection and discharge of the working fluid, such as steam in the central portion of the sealing surface, The lower side is configured to be provided with a condensate drain pipe 62 having a valve to drain the condensate.

Here, the liner folding rolling process 100 pressurizes both sides of the pressurizing portion while pressing and pressing one side of the tubular body by heating it in a state in which a constant length circular polyethylene pipe is fused or continuously compressed as shown in FIG. 1. The folding step 110 to fold, the taping step 120 to be wrapped and bound with tape on the sheet so that the liner folded through the folding step 110 is not restored and deployed, and taped through the taping step 120 It is made of a winding process (130) wound in a roll state on the spool 70 so as to be transported while heating the liner.

In addition, the water pipe cleaning process 220 is a scale attached to the wall by pulling the high pressure cleaner 40 having a plurality of scrapers 41 on the outside into the water pipe as shown in FIG. Scraping process 221 to scrape off and repeatedly, and high pressure washing process 222 to clean the scale wall is removed by spraying a high-pressure washing water toward the water pipe 20 in the high pressure cleaner (40). It is done by.

In addition, the liner installation process 240 is to bind the welding of the circular flange plate or the conventional flange socket tube to form a binding flange 22 for connection to the end of the water pipe 20 as shown in FIG. Liner inlet that draws in and draws the liner 10 using the winch 53 to the water pipe 20 in which the binding flange 22 is formed through the binding flange portion forming step 241 and the binding flange portion forming step 241. The steam shoes 60a, 60b are strap-mounted at both ends of the liner 10 introduced into the water pipe 20 through the process 242 and the liner traction process 242, and the main pipe of the one side steam shoe 60a ( 61 is connected to the mobile rehabilitation plant fleet 56, and the opposite side of the steam shoe (60b) is to be made of a steam shoe mounting process (243) for connecting the pressure regulator (54).

Meanwhile, the mobile rehabilitation plant vehicle 56 is a vehicle capable of generating steam, compressed air, and cooling air, and is configured to control generation of steam, supply of compressed air, and cooling air by an operator's operation. .

In addition, the pressure regulator 54 is configured to be provided with a valve, a pressure gauge, a thermometer, and the like to control the discharge of steam and compressed air discharged from the steam shoe (60b).

In addition, the liner expansion process 250 is a pressure control device while injecting steam at 120 ℃ through the main pipe 61 of the steam shoes 60a connected to the mobile rehabilitation plant fleet 56 as shown in FIG. A liner heating expansion process for softening and expanding the liner 10 by injecting steam until the discharge temperature from the pressure regulating device 54 reaches 110 ° C. by discharging it to the opposite side steam shoe 60b connected to 54. 251),

Condensate drain pipe formed in the lower side of the steam shoes (60a, 60b) condensate accumulated in the liner 10 to prevent the unbalanced softening of the liner 10 due to the condensed water condensed in the liner heating expansion process (251) ( A condensate drainage process 252 for draining to 62),

After the liner heating expansion process 251 is completed, compressed air is injected through the main pipe 61 of the injection-side steam shoe 60a so that the softened and expanded liner 10 is in close contact with the water pipe 20, but the softened liner 10 Liner adhesion process (253) to operate the valve of the pressure regulator 54 to prevent the bursting of the liner so that the internal air pressure of the liner 10 gradually increases from 1 kg / cm 2 to 3 kg / cm 2 with an internal temperature drop. and,

By injecting cooling air of about 7 ° C. into the injection-side steam shoe 60a such that the liner 10 adhered to the inner wall of the water pipe through the liner adhesion process 253 is cured, the temperature inside the liner 10 is about 35 ° C. The liner cooling process 254 until it reaches

After the curing of the liner 10 through the liner cooling process 254 is completed, the flange forming process of removing the steam shoes (60a, 60b) at both ends and forming a liner flange portion 12 for connection with the existing pipe ( 255).

On the other hand, the temperature of the steam supplied in the liner heating expansion step 251 can be carried out in a temperature range of 110 ~ 130 ℃, air liner cooling process 254 also can be carried out in a temperature range of 5 ~ 25 ℃ air temperature. will be.

On the other hand, in the practice of the present invention, as shown in Figure 9 "C" type stainless steel to prevent deformation and lifting due to the expansion and contraction of the liner 10 due to thermal expansion at the branch pipe liner 11 installation site Liner expansion and fixing step 310 to install the ring 81 and the expansion prevention 80 made of a fixing key 82 is inserted into the opening of the stainless ring 81 can be carried out.

 In addition, in the practice of the present invention, as shown in FIG. 10, when the wrinkle portion 13 is formed on the inner wall of the liner 10 due to the curved portion of the water pipe 20 of the construction section, the curved portion wrinkle removal process is removed. The curved part wrinkle removal process 320 may be performed to heat the wrinkle part 13 by inserting a heating port 91 such as a halogen lamp into the curved part where the wrinkle part 13 is formed. The pleating portion heating step 321 and the pleating portion 13, which is heated by the heating port 91, the expansion pressurization tube 92 is put into the pleat portion 13, and then supplied with compressed air to expand the pleating portion 13 protruding while expanding. Wrinkle pressing process 322 for flattening the pressure and the wrinkle removal step 323 of removing the air injected into the expansion pressure tube 92 after the completion of the flattening of the pleats 13 and taking it out of the water pipe 20 will be.

As described above, the liner 10, which is folded through the folding rolling process 100 and wound around the spool 70, is installed in the work tool construction process 210, the cleaning process 220, the imaging process 230, the liner installation process, Liner expansion process 250, branch pipe installation process 260, after the rehabilitation pipe connection process 270 through the present invention consisting of renovation of the old water pipe 20 to build a work tool as shown in FIG. Excavating both ends of the water pipe 20 to be regenerated through the process 210 to build a work tool 30 and then cut the old water pipe 20 so that the liner 10 can be introduced into the water pipe 20.

Then, the high-pressure cleaner 40 is introduced into the water pipe 20 through the cleaning process 220 as shown in FIG. 3, and the scale of the water pipe 20 to be regenerated is scaled by the scraper 41 and the high-pressure wash water. The water pipes are removed to clean the water pipes, and the inside of the water pipe 20 after the cleaning is completed through the photographing process 230 as illustrated in FIG. 4 to determine the position of the branch pipe 21 and the curved pipe part.

After the interior of the water pipe 20 is photographed as described above, a flange is attached to the both ends of the water pipe 20 to be regenerated through the liner installation process 240 as shown in FIG. The coupling flange 22 is formed in advance, and the folded liner 10 is introduced using the winch 53, and then, steam shoes 60a are mounted at both ends, and one side of the steam shoes 60a on both sides is mounted. Connected to the mobile rehabilitation plant vehicle 56 and the other side is connected to the pressure regulator 54 to complete the rehabilitation preparation.

In the state where the rehabilitation preparation is completed as described above, by injecting steam at 120 ° C. through the steam shoes 60a connected to the mobile rehabilitation plant vehicle 56 through the liner expansion process 250 as shown in FIG. 6. Injecting steam until the temperature of the steam discharged through the pressure regulator 54 mounted on the main pipe 61 of the opposite steam shoe (60b) is 110 ℃,

By injecting compressed air through the mobile rehabilitation plant (56), the internal pressure is gradually increased with an internal temperature drop from 1 kg / cm 2, pressurized to 3 kg / cm 2, and then again through the mobile rehabilitation plant vehicle (56). Inject cooling air of about 7 ℃ to perform a cooling operation until the temperature of the air discharged through the pressure regulator 54 reaches about 35 ℃,

When the cooling of the liner is completed through the above process, the steam shoes 60a and 60b are detached and the rehabilitation work is completed by forming the liner flange 12 at the end of the liner 10.

Then, after completing the liner expansion step 250 as described above through the branch pipe installation process 260 as shown in Figure 7 according to the image data collected in the imaging process 230 of the branch pipe 21 The branch pipe liner 11 is installed at a position, and as shown in FIG. 9, the expansion and fixing process is performed to prevent the elastic deformation and detachment of the liner 10 due to thermal expansion at the installation portion of the branch pipe liner 11. It is possible to prevent the expansion and contraction of the liner by installing the expansion prevention opening 80 through 310.

In addition, when there is a curved pipe portion in the regeneration section of the water pipe 20, the heating hole 91 formed of a halogen lamp or the like is introduced through the curved pipe wrinkle removing step 320 as shown in FIG. ) Is heated, the expansion pressurization tube 92 is put in, and the air pressure is expanded to compress the pleats 13 so as to be flattened.

Therefore, the present invention does not cause the overall excavation of the repair section in the repair of the old water pipes without causing traffic congestion, minimizing repair period and cost, increasing the lifespan of the repaired water pipes, and improving water quality and preventing leakage after repairs. Will be improved.

Further, by performing an expansion and fixing process of installing expansion and contraction prevention devices on both sides of the construction portion of the branch pipe liner, construction defects such as damage of the branch pipe liner due to expansion and contraction of the liner due to the change in water temperature are prevented.

In addition, by performing a curved portion wrinkle removal process for removing the wrinkle portion formed in the curved portion is to prevent the decrease in the water flow rate due to the wrinkles.

Claims (5)

A liner folding rolling process (100) for winding the spool (70) by folding the polyethylene pipe formed into a tubular body in half so that the water pipe (20) can be drawn in and transported; A work tool construction process 210 for excavating a road and cutting a water pipe so as to form a work tool 30 for rehabilitation work at both ends of the rehabilitation section of the old water pipe 20; A water pipe cleaning step 220 of inserting a high pressure cleaner 40 having a scraper 41 into the water pipe 20 to repeat the removal of the scale and the high pressure cleaning; Shooting process 230 to determine the location of the damaged portion and the branch pipe 21 by inputting the unmanned camera 51 connected to the ground-mounted vehicle 55 to the water pipe 20, the cleaning is completed through the cleaning process 220 )and; A liner installation process 240 for coupling the coupling flange 22 to both ends of the water pipe 20 and introducing the folded liner 10 and installing steam shoes 60a for injection of steam at both ends; Liner expansion process to expand and close the liner 10 to the water pipe 20 through the sequential supply of high-temperature steam, high pressure air and cooling air through the steam shoes (60a) to the liner introduced through the liner installation process 240 250; A branch pipe installation step 260 for installing a branch pipe liner 11 of a “T” type at a position of the branch pipe taken through the photographing step 230; Non-excavation PE lining rehabilitation method of the old water pipes, characterized in that made after connecting the water pipes and the existing water pipes after rehabilitation to refill the excavation site. The method of claim 1; The liner folding rolling process 100 is a folding process 110 for pressing and folding one side while heating a circular polyethylene pipe, and the liner folded through the folding process 110 to the tape on the sheet so that the folded liner is not deployed and restored. It is made of a taping process (120) for wrapping and strapping, and a winding process (130) wound in a roll state on the spool (70) to be transported while heating the taped liner through the taping process (120), The water pipe cleaning step 220 is a scraping process of scraping off the scale attached to the wall by pulling the high-pressure cleaner 40 having a plurality of scrapers 41 on the water pipe to the winch 53 and then ( 221, and the non-excavation of the old water pipes, characterized in that the high-pressure washing process 222 for cleaning the scale of the wall is removed by spraying high-pressure washing water toward the water pipe 20 in the high pressure cleaner (40). PE lining rehabilitation method. The method of claim 1; The liner installation process 240 is a binding flange portion forming step 241 of forming a binding flange 22 for connection to the end of the water pipe 20 and the binding flange (through the binding flange portion forming step 241) ( A liner inlet process 242 for pulling in and out of the liner 10 using the winch 53 to the water pipe 20 having the 22 formed thereon, and a liner introduced into the water pipe 20 through the liner towing process 242. Attach the steam shoes (60a, 60b) to both ends of the (10) and connect the mobile rehabilitation plant (56) to the main pipe 61 of one of the steam shoes (60a), the pressure on the opposite steam shoes (60b) Non-excavation PE lining rehabilitation method of the old water pipe, characterized in that the steam shoe mounting step (243) for connecting the adjusting device (54). The method of claim 1; The liner inflation process 250 injects steam at 120 ° C. through the main pipe 61 of the steam shoe 60a connected to the mobile rehabilitation plant vehicle 56. 60b) and a liner heating expansion process 251 for softening and expanding the liner 10 by injecting steam until the discharge temperature from the pressure regulator 54 reaches 110 ° C; The condensate accumulated in the liner 10 is drained to the condensate drain pipe 62 formed on the lower side of the steam shoe to prevent unbalanced softening of the liner 10 due to the condensed water condensed in the liner heating expansion process 251. Condensate drainage process (252), After the liner heating expansion process 251 is completed, compressed air is injected through the main pipe 61 of the injection-side steam shoe 60a so that the softened and expanded liner 10 is in close contact with the water pipe 20, but the softened liner 10 A liner adhesion process 253 for operating the valve of the pressure regulating device 54 to prevent the rupture of the liner so that the internal air pressure of the liner 10 is gradually increased from 1 kg / cm 2 to 3 kg / cm 2. The temperature inside the liner 10 is about 35 ° C. by injecting cooling air at about 7 ° C. to the injection side of the steam shoe 60a to cure the liner 10 adhered to the inner wall of the water pipe through the liner adhesion process 253. The liner cooling process 254 until it reaches After the curing of the liner 10 through the liner cooling process 254 is completed, the flange forming process of removing the steam shoes (60a, 60b) at both ends and forming a liner flange portion 12 for connection with the existing pipe ( Non-excavation PE lining rehabilitation method of the old water pipe, characterized in that consisting of (255). The method according to any one of claims 1 to 4; Inserted into the opening of the stainless ring 81 of the "C" type and the opening of the stainless ring 81 to prevent deformation due to expansion and contraction of the liner 10 due to thermal expansion at the branch pipe liner 11 installation site Liner expansion fixing step 310 for installing the expansion and contraction prevention 80 made of a fixing key 82, If the corrugated portion 13 is formed on the inner wall of the liner 10 due to the curved portion of the water pipe section 20 of the construction section, the curved portion wrinkle removal process 320 for removing it is performed, The curved portion wrinkle removal step 320 is a wrinkle portion heating step 321 for heating the wrinkle portion 13 by introducing a heating port 91 into the curved portion formed with the wrinkle portion 13, and the heating hole 91 After the expansion pressurized tube 92 is put into the pleated portion 13 heated by the pleating unit 13, the pleating crimping process 322 to pressurize and planarize the protruding pleated portion 13 while expanding by supplying compressed air, and the pleated portion The non-excavation PE lining rehabilitation method of the old water pipe, characterized in that consisting of a wrinkle removal completion step (323) of removing the air injected into the expansion pressure tube (92) after the completion of the planarization of (13) and take it out of the water pipe (20).

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