JP2012121240A - Lining method for conduit line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce working hours for lining a conduit line by using a resin pipe made of a thermoplastic synthetic resin.SOLUTION: A lining method for a conduit line is configured as follows. A traction belt 13 is inserted into a resin pipe 10 made of a thermoplastic synthetic resin. A through-hole 10a is formed in advance at one end of the resin pipe. The resin pipe 10 is installed in a sewage pipe 11 by advancing a reversed part of the resin pipe into the sewage pipe 11 while reversing the inner surface of the resin pipe into the outer surface of the resin pipe by high-temperature and high-pressure air and traction force of the traction belt 13. The reversed part of the resin pipe 10 is locally heated by a heater 19a on a heating truck 19 installed in the sewage pipe 11. When the installation of the resin pipe 10 in the sewage pipe 11 is completed, the part where the through-hole 10a of the resin pipe 10 is formed is located in a manhole 12b, and air in the reversed resin pipe 10 is discharged from the through-hole 10a.

Description

  The present invention relates to a method for lining a pipe, in which a resin pipe is installed in the pipe and the pipe is lined.

  In general, for the purpose of repairing or reinforcing a pipe such as a sewer pipe, it is known to install a resin pipe made of a synthetic resin material on the pipe and line the pipe. As a lining method for such a pipe line, Patent Document 1 discloses that a pipe having flexibility is inverted between its inner surface and outer surface by the pressure of a pressurized fluid, and the inverted part is used as a pipe line. It is described that the pipe is lined with a pipe by advancing. Furthermore, when the pipe is made of a hard thermoplastic synthetic resin such as polyethylene, it is described that the pipe is heated with a heating and pressurizing fluid such as high-temperature and high-pressure steam or air so that the pipe is inverted while being softened. .

JP 2003-285373 A

  Here, it is preferable to finish the lining of the pipe line as quickly as possible. For example, when the lining work is performed after temporarily stopping water when lining a sewer pipe, the time during which the water can be stopped is limited.

  In addition, when lining the sewer pipe, if water is not allowed to flow through the part where the sewage pipe is lined, work on the lining, pumping water from the manhole upstream of the lined part. In addition, the work involves returning the pumped water from the manhole on the downstream side to the lining portion to the sewer pipe. This operation is called water change. However, this water change involves time and place restrictions, and furthermore, it requires a lot of money to change water in restricted places.

  Specifically, a road must be occupied to lay a pump or a hose for pumping water. At this time, when a hose or the like crosses a large road, the work is performed after the traffic is entirely or partially restricted at night when the traffic is small. In addition, to prevent the hose from being flattened by being hit by a car, a strong bridge (hose bridge) is laid on the hose, or a guardman is erected at a key point. It is also necessary to take measures.

  The sewer pipe includes a sewage pipe for collecting sewage discharged from the home and sending it to a treatment plant, and a storm water pipe for collecting rainwater and flowing it to the river. There are two types of sewage pipe systems: a merging type that sends sewage to the treatment plant together with rainwater, and a shunting method that separates sewage and rainwater and sends them to the treatment plant. It has become. And in the case of a sewage pipe, there is a margin in the flow rate, and if it is about 2 hours, it will not overflow even if the water is stopped. Will not occur.

  From the above, in the sewer pipe (sewage pipe), there is a demand for a lining method for the pipe line so that the work can be completed in a short time (for example, within one hour) that does not require water change.

  On the other hand, as described above, after the resin pipe is installed in the pipeline, finishing work such as cutting the end portion of the resin pipe is required.

  However, immediately after the resin tube made of the thermoplastic synthetic resin is installed in the pipe line by the method described in Patent Document 1, the resin tube is at a high temperature, and a high-temperature fluid is placed inside the inverted resin tube. Therefore, immediately after the resin pipe is installed, the worker cannot enter the manhole and perform the next work. Therefore, after the resin pipe is installed, the next work cannot be started until the temperature in the pipe line is sufficiently lowered, and the time required for the lining work of the pipe is increased accordingly.

  Here, in order to shorten the time required for the temperature to drop, it is possible to make a hole in the resin tube after the resin tube is installed, and to discharge the fluid in the resin tube. It is dangerous for the operator to make a hole in the resin tube where the fluid remains.

  An object of the present invention is to provide a method for lining pipes with a short working time.

  A pipeline lining method according to the first invention is a pipeline lining method in which a resin pipe made of a thermoplastic synthetic resin is installed in a pipeline connected to a plurality of manholes, and the pipeline is lined. A communication hole for communicating the inside and the outside of the resin pipe is formed in a predetermined portion of the resin pipe, and the resin pipe is introduced into the pipe from a manhole connected to one end of the pipe. Then, by reversing the inner surface and the outer surface of the resin tube with the heated and pressurized fluid, the inversion portion is advanced to the pipe line, whereby the communication hole is formed in a manhole connected to the other end of the pipe line. The resin pipe is installed in the pipe line so as to open inward.

  When the resin pipe reaches the manhole connected to the other end of the pipe, it is necessary to cool the pipe while fitting the pipe while maintaining the pressure. While discharging the pressurized fluid to the outside and cooling by replacing the heated pressurized fluid with cooling water or the like, according to the present invention, when the resin pipe reaches the manhole connected to the other end of the pipeline, Since the heated and pressurized fluid in the inverted resin tube is discharged to the outside from the communication hole opened in the manhole, the temperature of the resin tube can be quickly lowered while maintaining the pressure. As a result, after the resin tube is installed, the time until the temperature of the resin tube is sufficiently lowered so that the next operation can be performed is shortened, and the operation time can be shortened.

  In addition, since the resin pipe is installed in the pipe after the communication hole is formed in the resin pipe, a dangerous operation such as forming the communication hole in the resin pipe after the resin pipe is installed in the pipe is not accompanied.

  A pipeline lining method according to a second invention is a pipeline lining method according to the first invention, and is connected to one end of the pipeline before introducing the resin pipe into the pipeline. A guide pipe made of a heat insulating material is installed in the manhole, and the resin pipe is introduced into the pipe from the manhole connected to one end of the pipe through the guide pipe.

  According to the present invention, since the resin pipe is introduced into the pipe line while being kept warm by the guide pipe, the temperature of the resin pipe is unlikely to decrease, and the resin pipe can be advanced to the pipe line while being smoothly reversed.

  A pipeline lining method according to a third invention is a pipeline lining method according to the first or second invention, wherein the inversion portion of the resin pipe is heated by a heating means different from the heated pressurized fluid. Is heated locally.

  According to the present invention, the inversion portion of the resin tube is locally heated by a heating means different from the heating and pressurizing fluid, and thereby the inversion portion of the resin tube is smoothly reversed to advance in the pipeline. Can do. In addition, since the resin tube is reversed after being sufficiently heated, cracks are unlikely to occur in the resin tube during the reversal.

  Furthermore, since the heating means locally heats only the inversion part that is desired to have a high temperature, the temperature rise in the other part of the resin tube can be suppressed as much as possible. Therefore, it can be suppressed as much as possible that the time required for the temperature of the resin pipe installed in the pipeline to sufficiently decrease due to the heating by the heating means becomes long.

  A pipeline lining method according to a fourth invention is a pipeline lining method according to any one of the first to third inventions, wherein the resin tube is introduced before the resin tube is introduced into the pipeline. A band-shaped insertion member is inserted through the insertion member, and the insertion member that is in close contact with the non-inverted portion of the resin tube is pulled in the traveling direction of the inverted portion by the pressure of the heated and pressurized fluid.

  According to the present invention, in addition to the pressure of the heated and pressurized fluid, the traction force of the insertion member can also advance the pipe line while inverting the resin pipe. Can be made.

  A pipeline lining method according to a fifth invention is the pipeline lining method according to any one of the first to fourth inventions, wherein the heated and pressurized fluid is supplied to the resin tube, thereby the resin tube. The resin pipe is introduced into the pipe line from a manhole connected to one end of the pipe line using a reversing machine that feeds the inner surface and the outer surface of the pipe pipe, and the reverse part of the resin pipe is connected to the pipe line. The reversing machine is characterized in that a heating device for heating the non-reversed portion of the resin tube is provided in the vicinity of the outlet for sending out the resin tube.

  According to the present invention, since the non-inverted portion of the resin tube immediately before being sent out from the delivery port is heated by the heating device, the inverted portion can be advanced to the pipe line while smoothly reversing the resin tube.

  A pipeline lining method according to a sixth invention is the pipeline lining method according to any one of the first to fifth inventions, wherein the heated and pressurized fluid is supplied to the resin tube, whereby the resin tube is provided. The resin pipe is introduced into the pipe line from a manhole connected to one end of the pipe line using a reversing machine that feeds the inner surface and the outer surface of the pipe pipe, and the reverse part of the resin pipe is connected to the pipe line. When the resin pipe is installed in the pipe, the heating and pressurization is applied from the reversing machine to the resin pipe until the reversal portion of the resin pipe reaches a predetermined position in the middle of the pipe. After the fluid is supplied and the reversing part of the resin tube reaches the predetermined position, the reversing machine supplies a pressurized fluid having a temperature lower than that of the heated pressurized fluid to the resin tube. .

  According to the present invention, after the reversal part of the resin pipe reaches a predetermined position in the middle of the pipe line, the resin pipe is already reversed by the pressurized fluid supplied from the reversing machine to the resin pipe at a low temperature. The part installed in can be cooled. Thereby, the time until the temperature of the resin pipe sufficiently decreases after the resin pipe is installed in the pipe line can be further shortened.

  In this way, even when a pressurized fluid having a low temperature is supplied to the resin pipe from the middle of the installation of the resin pipe in the pipeline, the high-temperature and high-pressure fluid that has been supplied up to that time is supplied to the inverted portion of the resin pipe. Since the inverted portion of the resin tube is heated by the high-temperature and high-pressure fluid, the resin tube is not easily inverted.

  According to the present invention, when the resin pipe reaches the manhole connected to the other end of the pipe, the heated and pressurized fluid in the inverted resin pipe is discharged to the outside from the communication hole opened in the manhole. Therefore, the temperature of the resin tube can be quickly lowered while maintaining the pressure. As a result, after the resin tube is installed, the time until the temperature of the resin tube is sufficiently lowered so that the next operation can be performed is shortened, and the operation time can be shortened.

  In addition, since the resin pipe is installed in the pipe after the communication hole is formed in the resin pipe, a dangerous operation such as forming the communication hole in the resin pipe after the resin pipe is installed in the pipe is not accompanied.

It is a perspective view which shows the structure of the resin pipe which concerns on embodiment of this invention, (a) is the original shape, (b) has shown the state deform | transformed so that it might become flat. It is a longitudinal cross-sectional view of a reversing machine. It is a figure which shows the procedure which installs a resin pipe in a sewer pipe, (a) is the state before installing a resin pipe in a sewer pipe, (b) is the state when introducing the resin pipe into the sewer pipe, ( c) shows the state when the resin pipe is installed in the sewer pipe. FIG. 3 is a partially enlarged view of FIG. 2 immediately after installation of a resin pipe is completed. FIG. 10 is a diagram corresponding to FIG. FIG. 6 is a view corresponding to FIG. 4 of Modification 1; FIG. 10 is a diagram corresponding to FIG. It is a figure equivalent to FIG.3 (c) of the modification 3. (A) is a figure corresponding to Drawing 1 (b) of modification 4, and (b) is a figure equivalent to Drawing 3 (c) of modification 4.

  Hereinafter, preferred embodiments of the present invention will be described.

  As shown in FIG. 1 (a), a resin pipe 10 (resin pipe) used as a lining material in the present embodiment is formed by polychlorinated on the outside of a cylindrical jacket 9 made of a woven fabric such as warp and weft. It is made of a hard thermoplastic synthetic resin material such as vinyl, and has a structure in which a substantially cylindrical resin layer 8 having a thickness larger than that of the jacket 9 is formed, and its outer diameter is, for example, an inner diameter of a sewer pipe 11 described later. About 300mm. In addition, the resin pipe 10 is formed with two through holes 10a (communication holes) that allow the inside and the outside of the resin pipe 10 to communicate with each other at symmetrical positions (predetermined portions) at one end. As will be described later, the through hole 10a is for discharging steam or air in the resin pipe 10 to the outside.

  Further, a pulling belt 13 (insertion member) is inserted into the resin pipe 10. The pulling belt 13 is for pulling the resin pipe 10 when the resin pipe 10 is installed in the sewer pipe 11 as described later. A rope 15 is connected to the pulling belt 13 at the end of the resin pipe 10 opposite to the through hole 10a.

  Then, before the resin pipe 10 is installed in the sewer pipe 11, as shown in FIG. 1 (b), the resin pipe 10 is deformed so as to be flat, and the reversing machine as shown in FIG. 14. In the present embodiment, before the resin pipe 10 is accommodated in the reversing machine 14, that is, before the resin pipe 10 is installed in the sewer pipe 11 as described later, for example, the resin pipe 10 In a manufacturing factory or the like, the through hole 10 a is formed in the resin pipe 10, and the traction belt 13 is inserted through the resin pipe 10.

  The reversing machine 14 is a device that sends out the resin pipe 10 from the outlet 14a provided at the left end of FIG. 2 while inverting the inner surface and the outer surface of the resin pipe 10 toward the resin pipe 10 accommodated therein. A pipe housing part 21, a pipe fixing part 22, a heater 23, guide rollers 24a and 24b, and the like are provided. The pipe accommodating portion 21 accommodates the resin pipe 10 deformed so as to be flat as described above in a wound state, and is supplied with high-pressure air from an air supply source (not shown). The pipe fixing part 22 is provided in the vicinity of the delivery port 14a, and the end of the pipe fixing part 22 opposite to where the through hole 10a of the resin pipe 10 is formed is fixed. In addition, since the structure of the pipe accommodating part 21 and the pipe fixing | fixed part 22, the attachment method of the resin pipe 10 to the pipe fixing | fixed part 22 are the same as before (for example, refer Unexamined-Japanese-Patent No. 55-145572 etc.). Here, further detailed description is omitted.

  The heater 23 (heating device) is arranged in the vicinity of the delivery port 14a so as to face the top and bottom, and the resin pipe 10 is sent out from the delivery port 14a through the space between the top and bottom heaters 23. The heater 23 heats the non-inverted portion of the resin pipe 10 located in the vicinity of the delivery port 14a and the air supplied to the reversing machine 14 in the vicinity of the pipe housing part 21 and the delivery port 14a. In FIG. 2, the resin pipe 10 passing between the opposing heaters 23 is in contact with the heater 23, but the heater 23 and the resin pipe 10 may be in non-contact. Instead of the heater 23, an infrared heating device or a heating device that performs heating with high-temperature steam may be used.

  The guide roller 24 a is arranged on the right side of the heater 23 in FIG. 2 so as to sandwich the resin pipe 10. The guide roller 24a guides the resin pipe 10 accommodated in the pipe accommodating part 21 between the heaters 23 facing vertically. The guide roller 24b is disposed so as to sandwich the resin pipe 10 on the left side of the heater 23 in the figure. The guide roller 24b takes up the resin pipe 10 that has passed between the heaters 23 that are vertically opposed to each other and guides the resin pipe 10 toward the delivery port 14a.

  The reversing machine 14 is supplied with high-temperature and high-pressure (heated and pressurized fluid) from an air supply source reversing machine 14 (not shown). Thereby, the resin pipe 10 is heated by the high-temperature and high-pressure air and the heater 23 to a temperature higher than the Vicat softening point and lower than the melting point (for example, about 70 ° C. to 130 ° C. in the case of polyvinyl chloride). In addition, due to the pressure of the air, the heated resin pipe 10 is sent out from the delivery port 14a while reversing the inner surface and the outer surface in order from the end opposite to the through hole 10a. . At this time, the resin pipe 10 is heated by the high-temperature and high-pressure air to the temperature at which the resin pipe 10 is softened (for example, about 100 ° C.), and the unreversed portion immediately before being sent out from the delivery port 14a is a heater. 23 is further heated to a higher temperature (for example, about 130 ° C.). In the reversing machine 14, the operation of reversing the resin pipe 10 from the delivery port 14a is the same as the conventional one (for example, see Japanese Patent Application Laid-Open No. 55-145572). The detailed explanation is omitted.

  And in this Embodiment, as shown in FIG.3, FIG.4, the part located between the two manholes 12a and 12b among the sewer pipes 11 (pipes) is the resin pipe 10 as mentioned above. By lining, the part of the sewer pipe 11 is repaired or reinforced. Here, as will be described later, the length of the resin pipe 10 and the position of the through hole 10a are determined so that the through hole 10a opens into the manhole 12b in a state where the installation to the sewer pipe 11 is completed. ing. Specifically, the length of the resin pipe 10 is set in the length of the part between the manhole 12a and the manhole 12b of the sewer pipe 11, the length from the reversing machine 14 to the sewer pipe 11, and the sewer pipe 11. In this state, the length of the portion located in the manhole 12b is added.

  The sewer pipe 11 is, for example, a pipe having an inner diameter of about 300 mm, and is slightly inclined with respect to the horizontal direction so that the portion on the right side in FIG. That is, the right side of FIG. 3 is the upstream side of the sewer pipe 11, and water flows from the right side to the left side in the figure.

  Next, a procedure for lining the sewer pipe 11 with the resin pipe 10 will be described. In order to line the sewer pipe 11 with the resin pipe 10, first, as shown in FIG. 3 (a), a water stop plug 17 is installed in a part of the sewer pipe 11 upstream of the upstream manhole 12a. Thus, the water is stopped so that the water does not flow into a portion of the sewer pipe 11 located between the two manholes 12a and 12b.

  Next, a heater 19a (heating means) is provided on the portion of the sewer pipe 11 immediately downstream of the manhole 12a (left side in FIG. 3A), and the heating carriage 19 is movable along the sewer pipe 11. Place. In addition, although the tow rope for moving a heating trolley along the sewer pipe 11, an electric wire, etc. are connected to the heating trolley 19, illustration of these is abbreviate | omitted here. In addition, a guide pipe 18a made of a heat insulating material having substantially the same diameter as that of the opening is installed in the vicinity of the opening on the ground of the manhole 12a, and the direction of travel of the resin pipe 10 is described below at the lower end of the manhole 12a. A guide plate 18b for changing the position is installed. Here, the heat insulating material that constitutes the guide tube 18a is, for example, a polyester short fiber having a thickness of about 5 to 30 denier, which has a low density and can store an air layer, and is made into a nonwoven fabric by punching or the like. A polyester nonwoven fabric having a thickness of about 5 to 20 mm.

  Next, the rope 15 connected to the traction belt 13 inserted through the resin pipe 10 is inserted in the order of the manhole 12a, the sewer pipe 11 and the manhole 12b, and the tip of the rope 15 pulled out from the manhole 12b to the ground is It is attached to a winder 16 provided near the entrance of the manhole 12b. In the present embodiment, a hole or the like for inserting the rope 15 is formed in the heater 19a so that the rope 15 can be inserted.

  Next, in the reversing machine 14, the resin pipe 10 is heated and softened by the high-temperature air supplied from an air supply source (not shown) and the heater 23, and this air pressure causes the resin pipe 10 to be as shown in FIG. As shown in the figure, in order from the end opposite to the through hole 10a, the inner and outer surfaces of the resin pipe 10 are reversed, and the inverted portion proceeds along the guide tube 18a and the guide plate 18b. That is, the resin pipe 10 is moved downward along the guide pipe 18a, and the traveling direction is changed to the extending direction of the sewer pipe 11 by the guide plate 18b at the lower end portion of the manhole 12a. Thereby, it introduces into the sewer pipe 11 from the manhole 12a. At this time, since the resin pipe 10 is introduced from the manhole 12a to the sewer pipe 11 through the guide pipe 18a made of a heat insulating material, the temperature of the resin pipe 10 is not easily lowered, and the resin pipe 10 is smoothly reversed, The inverted part can be advanced to the guide tube 18a.

  At this time, by heating the resin pipe 10 in advance in the factory where it was manufactured or during transportation, when the resin pipe 10 is heated with air, the resin pipe 10 reaches the above temperature in a short time. It may be.

  Further, at this time, the rope 15 connected to the pulling belt 13 is wound up by the winder 16. The non-inverted portion of the resin pipe 10 is in close contact with the traction belt 13 by the pressure of the air supplied from the inversion machine 14. Therefore, when the rope 15 is wound up by the winder 16, the resin pipe 10 is pulled by the pulling belt 13 in the traveling direction (left side in FIG. 3) of the inverted portion. That is, in the present embodiment, the resin pipe 10 is reversed by the traction force of the traction belt 13 in addition to the air pressure, and the inverted portion is advanced to the guide tube 18a.

  The resin pipe 10 introduced into the sewer pipe 11 is further reversed by the air pressure and the traction force of the traction belt 13 as shown in FIG. Accordingly, the resin pipes 10 are sequentially installed in the sewer pipe 11.

  At this time, in the present embodiment, the reversing machine 14 is heated until the inverted portion of the resin pipe 10 reaches a predetermined position of the sewer pipe 11 (for example, an intermediate point between the manhole 12a and the manhole 12b in the sewer pipe 11). By supplying high-pressure air and driving the heater 23, high-temperature and high-pressure air is supplied to the resin pipe 10, and after the reversing portion of the resin pipe 10 reaches the predetermined position, the reversing machine 14 is supplied with room temperature and high pressure. And the heater 23 is turned off, whereby high-pressure air having a lower temperature than before is supplied to the resin pipe 10.

  At this time, the inverted portion of the resin pipe 10 is locally heated by contacting the heater 19 a of the heating carriage 19. At this time, the heating carriage 19 is moved along the sewer pipe 11 by pulling a tow rope (not shown) in accordance with the progress of the inverted portion of the resin pipe 10.

  And the resin pipe 10 installed in the sewer pipe 11 is expanded in diameter by the pressure of air, and the outer peripheral surface after inversion closely contacts the inner surface of the sewer pipe 11. Thereby, the sewer pipe 11 is lined with the resin pipe 10. Further, since the resin pipe 10 that is lined is cured as the temperature subsequently decreases, the resin pipe 10 is held in close contact with the inner surface of the sewer pipe 11.

  In the present embodiment, as described above, the resin pipe 10 is inverted by the air pressure and the traction force of the traction belt 13, and the inverted portion is advanced to the manhole 12a and the sewer pipe 11. The resin pipe 10 can be smoothly reversed and the inverted portion can be advanced to the manhole 12a and the sewer pipe 11.

  Further, since the reverse portion of the resin pipe 10 is locally heated by the heater 19a, the reverse portion of the resin pipe 10 is surely softened. Therefore, the reverse part can be advanced to the sewer pipe 11 while the resin pipe 10 is smoothly reversed. Moreover, since the resin pipe 10 is inverted while being sufficiently heated, it is possible to prevent the resin pipe 10 from being cracked.

  Moreover, since the non-inverted portion of the resin pipe 10 immediately before being sent out from the delivery port 14a of the reversing machine 14 is heated by the heater 23, the inverted portion is further smoothly reversed while the inverted portion is replaced with the sewer pipe 11. Can proceed to.

  And in the state which installation of the resin pipe 10 to the sewer pipe 11 completed, as shown in FIG. 3, the part in which the through-hole 10a was formed among the resin pipes 10 has opened in the manhole 12b, and it reverses The hot air in the resin pipe 10 thus discharged is discharged from the through hole 10a to the outside of the resin pipe 10.

  Here, in this embodiment, since the resin pipe 10 is heated by the heat of air when the resin pipe 10 is installed in the sewer pipe 11, the resin pipe 10 is immediately after the installation of the resin pipe 10 is completed. And the high temperature air exists inside the inverted resin pipe 10.

  However, in this embodiment, as described above, when the installation of the resin pipe 10 to the sewer pipe 11 is completed, the high-temperature air in the resin pipe 10 is discharged from the through hole 10a opened in the manhole 12b. Therefore, the temperature of the resin pipe 10 can be quickly reduced. Therefore, after the installation of the resin pipe 10 to the sewer pipe 11 is completed, the temperature of the resin pipe 10 is sufficiently lowered to remove the portion of the resin pipe 10 located in the manhole 12b, the guide pipe 18a and the heating carriage. The time until the work such as the removal of 19 can be performed is shortened, and the work time can be shortened. At this time, the low-temperature air is supplied from the reversing machine 14 to the resin pipe 10, so that the pressure in the resin pipe 10 is maintained, and until the resin pipe 10 is cured by this pressure, The sewer pipe 11 is kept in close contact with the wall surface.

  Further, there is no dangerous work such as the need to form a through hole in the resin pipe 10 after the installation of the resin pipe 10 to the sewer pipe 11 is completed.

  Moreover, in this Embodiment, when installing the resin pipe 10 in the sewer pipe | tube 11, as above-mentioned, only the inversion part of the resin pipe 10 which needs to be high temperature is locally heated with the heater 19a. Therefore, the temperature rise of the other part of the resin pipe 10 due to heating by the heater 19a is suppressed as much as possible. Therefore, it can be suppressed as much as possible that the time required for the temperature of the resin pipe 10 to sufficiently decrease due to the heating by the heater 19a becomes long.

  In the present embodiment, as described above, when the resin pipe 10 is installed in the sewer pipe 11, high-temperature and high-pressure air is supplied to the resin pipe 10 halfway, and from the middle than before. Since normal temperature and high pressure air having a low temperature is supplied, the portion where the inversion of the resin pipe 10 is completed is cooled by the low temperature air. Thereby, the time taken for the temperature of the resin pipe 10 to be lowered can be further shortened.

  Even if the temperature of the air supplied to the resin pipe 10 is lowered in the middle as described above, the high-temperature and high-pressure air that has been supplied so far exists in the inverted portion of the resin pipe 10. The inversion portion is heated by this high-temperature and high-pressure air. Further, the inverted portion of the resin pipe 10 is also heated by the heater 19a. Therefore, when the resin pipe 10 is installed in the sewer pipe 11, even if the temperature of the air supplied from the middle to the resin pipe 10 is low, the resin pipe 10 does not easily turn over.

  Next, modified examples in which various changes are made to the present embodiment will be described. However, description of components having the same configuration as in this embodiment will be omitted as appropriate.

  In one modified example (modified example 1), as shown in FIGS. 5 and 6, the pulling belt 13 (see FIG. 4) is not inserted into the resin pipe 10, and instead, the through hole of the resin pipe 10 is used. The control belt 26 is attached to the resin pipe 10 by inserting the control belt 26 into two through holes 10b formed in a portion closer to the tip than 10a.

  In this case, the reversing unit 14 reverses the resin pipe 10 only by air pressure to the resin pipe 10, and advances the reversal portion to the manhole 12 a and the sewer pipe 11.

  Further, in this case, when the manhole 12a and the sewer pipe 11 are advanced while the resin pipe 10 is reversed, the end portion of the resin pipe 10 to which the control belt 26 is attached is moved in the traveling direction by the control belt 26. Pulled in the opposite direction (right side of FIG. 5). Thereby, an appropriate tension is applied to the inverted portion of the resin pipe 10, and the inverted portion of the resin pipe 10 travels through the sewer pipe 11 at a speed corresponding to the tension by the control belt 26.

  In Modification 1, the traction belt 13 is not provided, but both the traction belt 13 and the control belt 26 may be provided for the resin pipe 10.

  Moreover, in the above-mentioned embodiment, although the inversion part of the resin pipe 10 was locally heated with the heater 19a of the heating trolley 19 arrange | positioned at the sewer pipe 11, the resin pipe 10 is heated by heating means other than the heater 19a. The inversion portion may be locally heated.

  For example, in another modification (Modification 2), as shown in FIG. 7, instead of the heating carriage 19 (see FIG. 3), a steam injection hose 31 (heating means) that injects high-temperature steam from the tip is provided. The sewer pipe 11 is inserted from the manhole 12b on the downstream side. The tip of the steam injection hose 31 is attached to a carriage 32 that can move in the sewer pipe 11, and is directed to the inverted portion of the resin pipe 10. And the inversion part of the resin pipe 10 is heated locally by the high temperature steam injected from the steam injection hose 31.

  Further, the steam injection hose 31 is attached to a winding device 33, and by winding the steam injection hose 31 with the winding device 33, the resin pipe 10 is connected to the tip portion (cart 32) of the steam injection hose 31. The sewer pipe 11 can be moved as it progresses.

  Further, the resin pipe 10 may be heated only by high-temperature and high-pressure air supplied from the reversing machine 14 without locally heating the inverted portion of the resin pipe 10.

  In the above-described embodiment, the guide pipe 18a and the guide plate 18b made of a heat insulating material for guiding the resin pipe 10 from the manhole 12a to the sewer pipe 11 are provided. However, the guide pipe 18a and the guide plate 18b are provided. May be made of a material other than the heat insulating material. Furthermore, the guide tube 18a and the guide plate 18b may not be provided.

  Further, another pipe line may be connected to a portion of the sewer pipe 11 between the two manholes 12a and 12b. For example, in another modified example (Modified Example 3), as shown in FIG. 8, a plurality of (shown in FIG. 8) respectively connected to the household tub 41 in the portion between the two manholes 12a and 12b of the sewer pipe 11. Then, two) attachment pipes 42 are connected.

  In this case, in order to shorten the work time, after the installation of the resin pipe 10 to the sewer pipe 11 is completed, the stenosis machine 43 is inserted into the attachment pipe 42 from the household tub 41, and the A hole having a diameter smaller than the opening of the attachment tube 42 (for example, a hole having a diameter of about 150 mm), which is the minimum necessary for water to flow, is formed in a portion of the pipe 10 blocking the opening of the attachment tube 42. Thereby, after the installation of the resin pipe 10 to the sewer pipe 11 is completed, the minimum drainage from the household pipe 41 to the sewer pipe 11 becomes possible immediately. And a through-hole is formed in the whole part which has blocked the attachment pipe 42 of the resin pipe 10 from the sewer pipe 11 side later.

  In the third modification, the attachment pipe 42 is connected between the two manholes 12a and the manhole 12b of the sewer pipe 11, but another manhole is provided between the two manholes 12a and the manhole 12b of the sewer pipe 11. May be connected. In this case, after forming the resin pipe 10 in the sewer pipe 11 in the same manner as in the above-described embodiment, a through-hole is formed in the portion of the resin pipe 10 that covers the other manhole, thereby forming the sewer pipe. 11 (resin pipe 10) communicates with the other manhole.

  Further, in the above-described embodiment, the through hole 10a is formed in the resin pipe 10 as the communication hole that allows the inside and the outside of the resin pipe 10 to communicate with each other. However, the present invention is not limited thereto. In another modification (Modification 4), as shown in FIG. 9A, the through hole 10a is not formed in the resin pipe 10, and instead, it becomes flat before being installed in the sewer pipe 11. In the deformed state, the end portion of the resin pipe 10 where the through hole 10a is formed is sewn except for a part thereof, and the end portion of the resin pipe 10 is not sewn. A communication hole 10c is formed by inserting and expanding a pipe 51 made of a metal material or the like in the portion. Here, the pipe 51 is not a long one inserted through the entire length of the resin pipe 10 but a short one inserted only through the end portion of the resin pipe 10.

  In this case, when the resin pipe 10 is installed in the sewer pipe 11 in the same manner as described above, the resin into which the pipe 51 is inserted (the communication hole 10c is formed) as shown in FIG. 9B. The end of the pipe 10 is located in the manhole 12b, and high-temperature and high-pressure air in the resin pipe 10 is discharged from the pipe 51 (communication hole 10c).

  In the above-described embodiment, high-temperature and high-pressure air is supplied to the reversing machine 14 halfway and normal-temperature and high-pressure air is supplied halfway. However, the present invention is not limited to this. For example, while the resin pipe 10 is installed in the sewer pipe 11, air at normal temperature and high pressure is always supplied to the reversing machine 14, and the heater 23 is driven to heat the air supplied to the reversing machine 14. 10 is supplied with high-temperature and high-pressure air, and the heater 23 is turned off midway so that the air supplied to the reversing machine 14 is not heated, so that the resin pipe 10 has a lower temperature than the high-temperature and high-pressure air. May be supplied.

  Furthermore, it is not limited to changing the temperature of the air supplied to the resin pipe 10 in the middle. While installing the resin pipe 10 in the sewer pipe 11, for example, while always supplying high temperature and high pressure air to the reversing machine 14, By continuing to drive the heater 23, high-temperature and high-pressure air may be continuously supplied to the resin pipe 10.

  In the above-described embodiment, the heater 23 is provided in the vicinity of the outlet 14 a of the reversing machine 14, but the heater 23 may be provided in another part of the reversing machine 14. Furthermore, when the high temperature and high pressure air is supplied to the reversing machine 14, the resin pipe 10 can be softened by the supplied air without heating the air supplied to the reversing machine 14. The reversing machine 14 may not be provided with the heater 23.

  In the above, high-temperature and high-pressure air is supplied from the reversing machine 14 to the resin pipe 10, but this is not a limitation. For example, another heating and pressurization such as high-temperature and high-pressure steam is applied from the reversing machine 14 to the resin pipe 10. A fluid may be supplied.

  In the above-described embodiment, the water is prevented from flowing into the portion between the manhole 12a and the manhole 12b of the sewer pipe 11 by stopping the water of the sewer pipe 11 with the water stop plug 17. It is not limited to. For example, by pumping up the water in the sewer pipe 11 from the manhole further upstream than the manhole 12a, the pumped water is returned to the sewer pipe 11 from the manhole further downstream from the manhole 12b. The water may be prevented from flowing into a portion of the sewer pipe 11 between the manhole 12a and the manhole 12b.

  Moreover, although the example which lined the sewer pipe | tube 11 with the resin pipe 10 was demonstrated above, it is not restricted to this, It is carried out similarly to what was mentioned above to other pipe lines connected to a manhole, such as a water pipe and a gas pipe. It is also possible to form the resin pipe 10.

DESCRIPTION OF SYMBOLS 10 Resin pipe 10a Through-hole 10c Through-hole 11 Sewer pipe 12a, 12b Manhole 13 Towing belt 14 Reversing machine 18 Guide pipe 19a Heater 23 Heater 31 Steam injection hose

Claims (6)

In a pipeline connected to a plurality of manholes, a resin pipe made of a thermoplastic synthetic resin is installed, and the pipeline is lined.
In a predetermined portion of the resin tube, a communication hole that communicates the inside and the outside of the resin tube is formed,
The resin pipe is introduced into the pipe line from a manhole connected to one end of the pipe line, and the inside and the outer surface of the resin pipe are reversed by a heated and pressurized fluid, and the inverted portion is connected to the pipe line. A method for lining a pipe, wherein the resin pipe is installed in the pipe so that the communication hole opens into a manhole connected to the other end of the pipe by being advanced. Before introducing the resin pipe into the pipe line, in a manhole connected to one end of the pipe line, a guide pipe made of a heat insulating material is installed,
2. The pipe lining method according to claim 1, wherein the resin pipe is introduced into the pipe from a manhole connected to one end of the pipe through the guide pipe.   3. The pipe lining method according to claim 1, wherein the inversion portion of the resin pipe is locally heated by a heating means different from the heating and pressurizing fluid. Before introducing the resin pipe into the pipe line, a band-shaped insertion member is inserted through the resin pipe,
The pipe line according to any one of claims 1 to 3, wherein the insertion member that is in close contact with the non-inverted portion of the resin pipe is pulled in the advancing direction of the inverted portion by the pressure of the heated and pressurized fluid. The lining method. By supplying the heated and pressurized fluid to the resin pipe, the resin pipe is sent from a manhole connected to one end of the pipe using a reversing machine that feeds the resin pipe while reversing its inner surface and outer surface. Introducing into the pipeline and reversing the resin pipe to the pipeline,
5. The heating device for heating the non-inverted portion of the resin tube is provided in the reversing machine in the vicinity of a delivery port for feeding out the resin tube. Line lining method. By supplying the heated and pressurized fluid to the resin pipe, the resin pipe is sent from a manhole connected to one end of the pipe using a reversing machine that feeds the resin pipe while reversing its inner surface and outer surface. Introducing into the pipeline and reversing the resin pipe to the pipeline,
When the resin pipe is installed in the pipe, the heated and pressurized fluid is supplied from the reversing machine to the resin pipe until the reversal portion of the resin pipe reaches a predetermined position in the middle of the pipe. The pressurized fluid having a temperature lower than that of the heated pressurized fluid is supplied from the reversing device to the resin tube after the inverted portion of the resin tube reaches the predetermined position. 5. A method for lining a pipeline according to any one of 5 above.

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