JP2013236457A - In-pipe wiring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable simple and easy insertion of a wiring tool into a pipe even if there is an obstacle, such as a step, inside the pipe.SOLUTION: A cylindrical body roll 2 that is a roll of a cylindrical body is placed within a pipe 10. Pressure air is supplied into the cylindrical body 1 to inflate the cylindrical body 1 into a pipe shape while rolling out the cylindrical body roll 2 within the pipe 10 to make the cylindrical body 1 penetrate the pipe 10. A traction member is then connected to the cylindrical body 1 and the cylindrical body 1 is taken out to lay the traction member inside the pipe 10.

Description

  TECHNICAL FIELD The present invention relates to an in-pipe method for inserting a pulling material for pulling a new pipe into a pipe line before laying a new pipe such as a rehabilitation pipe or a cable pipe in a pipe line such as an existing pipe. It is.

  Conventionally, a lining pipe made of a thermoplastic resin such as vinyl chloride or polyethylene that has a smaller diameter than the inner diameter of the existing pipe and recovers the shape of the pipe at the shape memory temperature is inserted into the existing pipe buried in the ground. Then, a rehabilitation method has been proposed and implemented in which a lining pipe is heated and pressurized to expand and expand in diameter, and is restored to a circular pipe shape to be in close contact with the inner peripheral surface of the existing pipe. (For example, refer to Patent Document 1).

  In such a rehabilitation method, prior to drawing the lining pipe, a traction material for connecting to the lining pipe is inserted in advance into the existing pipe, and the traction material inserted into the existing pipe is inserted directly into the lining pipe or via a jig. It is necessary to pull the lining pipe into the existing pipe by pulling the traction material. Specifically, as shown in Patent Document 2, a tow string connected to a parachute-like pulling member is converged to form a towing tool, and a wire rod is connected to a converging portion of the tow string and inserted into an existing pipe. After that, pressure air is supplied into the existing pipe via a blower and the wire connected to the traction tool is inserted into the existing pipe by pumping the traction tool.

Japanese Patent Laid-Open No. 11-230212 JP 2003-156306 A

  However, in existing pipes, protrusions such as rust humps may protrude on the inner surface, or there may be steps due to crustal movements such as earthquakes. Therefore, when there is such an obstacle, the above-described traction tool may be difficult to be caught by the obstacle and inserted. In addition, frictional resistance corresponding to the contact area is generated between the inner surface of the existing pipe and the traction member, and pressure air is gradually attenuated, and the traction member is not easily transferred.

  The present invention has been made in view of such a problem, and even if there is an obstacle such as a step in the pipeline, the in-pipe wiring method can easily and reliably insert the traction material into the pipeline. Is to provide.

  In the present invention, a cylindrical body roll obtained by winding a cylindrical body into a roll shape is disposed in a pipeline, and pressurized air is supplied into the cylindrical body to expand the cylindrical body into a tubular shape. After rolling the body roll in the pipeline and inserting the tubular body into the pipeline, connecting the traction material to the tubular body and pulling the tubular body, and inserting the traction material into the pipeline It is a feature.

  According to this invention, after winding a cylindrical body in roll shape and forming a coreless cylindrical body roll, a cylindrical body roll is arrange | positioned in a pipe line. Then, if an air source such as a blower is connected to the tip of the cylindrical body in the cylindrical body roll and pressurized air is supplied, the cylindrical body expands into a substantially circular cross section and extends substantially linearly. . Furthermore, the expanded tubular tubular body presses the tubular body roll and rolls it forward. Therefore, the cylindrical body roll is rolled in the pipe line by the pressure air, so that the cylindrical body expanded in a substantially straight pipe is extended in the pipe line and inserted through the set span. Here, even if there is an obstacle such as a step in the pipeline, the pressurized air can get over the cylindrical body roll by pressing it. Moreover, the expanded tubular cylindrical body is smoothly extended without increasing the frictional resistance with the pipe line. Thereafter, the pulling member such as a wire or a rope is connected to the tubular body, or the tubular member is taken out with the tape fixed, whereby the pulling member can be inserted into the pipe line.

  As a result, a coreless cylindrical body roll obtained by winding the cylindrical body into a roll shape is arranged in the pipe line, and the cylindrical body is securely attached to the pipe line by a simple operation such as supplying pressurized air to the cylindrical body. Can be inserted. Therefore, the traction material can be easily inserted into the pipeline by connecting the traction material to the cylindrical body inserted through the pipeline and pulling the cylindrical body toward the cylindrical body roll.

  The present invention supports the axial center of a cylindrical body roll having an axial center wound around the cylindrical body in a roll shape so as to be rotatable with respect to the pipeline, and supplies pressurized air to the inside of the cylindrical body Then, the tubular body is expanded into a tubular shape, and the tubular body roll is rotated to feed the tubular body into the pipeline, and the tubular body is inserted in a state where the tubular body is folded back into the pipeline. The traction material is connected to take up the cylindrical body, and the traction material is inserted into the pipe.

  According to the present invention, the cylindrical body roll is wound around the axis to form a cylindrical body roll having an axis, and then the cylindrical body roll having the axis is placed on a stand with respect to the pipeline. It is supported rotatably via Next, when an air source such as a blower is connected to the end of the cylindrical body in the cylindrical body roll having an axial center and pressure air is supplied, the cylindrical body expands into a substantially circular cross section and is substantially straight. It extends into a shape. And the pressure air which acts on the expanded tubular tubular body acts on the folded portion with the tubular body drawn out from the tubular body roll having an axis, and moves the folded portion of the tubular body forward. . That is, a cylindrical body is drawn out from a cylindrical body roll having an axis, and the cylindrical body roll having an axis is rotated accordingly. Therefore, the cylindrical body roll having an axial center by the pressure air continues to rotate and feeds the cylindrical body, so that the cylindrical body expanded into a substantially straight tube is folded into the pipe line in a folded state, It is inserted over the set span. Here, even if there is an obstacle such as a step in the pipe, there is no resistance when the folded portion of the tubular body expanded in a tubular shape moves, and the obstacle can be easily overcome. Moreover, the expanded tubular cylindrical body is smoothly extended without increasing the frictional resistance with the pipe line. Thereafter, the pulling member such as a wire or a rope is connected to the tubular body, or the tubular member is taken out with the tape fixed, whereby the pulling member can be inserted into the pipe line.

  As a result, a simple operation of supporting a cylindrical body roll having an axial center wound around the cylindrical body in a roll shape so as to be rotatable with respect to the pipeline and supplying pressurized air to the cylindrical body. Thus, the tubular body can be surely inserted into the duct. Therefore, the traction material can be easily inserted into the pipeline by connecting the traction material to the cylindrical body inserted through the pipeline and pulling the cylindrical body toward the cylindrical body roll having the axis. .

  In this invention, it is preferable that the said cylindrical body is wound up by the axial center at roll shape, and is formed in the cylindrical body roll which has an axial center. Thereby, a cylindrical body can be wound up easily and can be reused.

  In the present invention, it is preferable that rolling elements having an outer diameter larger than the outer diameter of the cylindrical roll are fixed to both ends of the axial center of the cylindrical roll having the axial center. Thereby, compared with the frictional resistance which generate | occur | produces when the cylindrical body roll which has an axial center rolls, a frictional resistance can be reduced and it can be moved smoothly.

  In the present invention, it is preferable that a weight is fixed in the axis. As a result, when the cylindrical body roll having the axial center rolls and moves directly, or moves through the rolling body, gravity acts so as to be positioned at the tube bottom of the pipe line by the weight. The meandering of the cylindrical roll can be suppressed. In this case, the weight is fixed at the center of the axis.

  In the present invention, it is preferable that a weight is rotatably suspended on the axis. As a result, when the cylindrical body roll having the axial center moves through the rolling element, gravity acts so as to be positioned at the tube bottom of the pipe line by the weight, thereby suppressing the meandering of the cylindrical body roll. Can do. In this case, the weight is suspended so as to be located at the center of the axis.

  In the present invention, it is preferable that a guide extending in the insertion direction of the cylindrical body is rotatably supported by the shaft center. Thereby, it can move, avoiding obstructions, such as a level difference of a pipe line. In this case, by making the entire length including the guide larger than the inner diameter of the pipe, the guide is always directed in the axial direction of the pipe, so that the meandering of the cylindrical roll is surely prevented. be able to.

  According to the present invention, even if there is an obstacle such as a step in the pipeline, the traction material can be easily and reliably inserted into the pipeline.

It is the schematic explaining one Embodiment of the in-pipe connection method of this invention. It is the schematic explaining other embodiment of the in-pipe connection method of this invention. It is the schematic explaining another embodiment of the in-pipe connection method of this invention. It is a perspective view explaining another other embodiment of the in-pipe connection method of this invention. It is a perspective view explaining the modification of the in-pipe connection method of FIG. It is a perspective view explaining the other modification of the in-pipe connection method of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the in-pipe connection method of the present invention.

  This in-pipe connection method is carried out using a cylindrical body roll 2 formed by winding the cylindrical body 1 into a roll.

  Here, the cylindrical body 2 is formed by folding a flexible long plastic film, for example, a film made of polyethylene, polypropylene, polyvinyl chloride, nylon or the like, and heat-fusing or bonding the folded portion. It is formed.

  When the tubular body 1 is connected to the conduit 10, the tubular body roll 2 is disposed at one end of the conduit 10 in the passing section, and the tubular body roll 2 has a distal end portion of the tubular body 1. After connecting the air source 20 of pressure air, for example, a blower, the blower is driven to supply the compressed air to the tubular body 1. Thereby, pressurized air is supplied to the cylindrical body 2 wound up by the cylindrical body roll 2, expands the cylindrical body 1 into a tubular shape, and extends substantially linearly. At this time, the pressurized air presses the tubular body roll 2 through the expanded tubular tubular body 1 to roll the tubular body roll 2 forward. That is, the tubular body 1 expands into a tubular shape and extends in a substantially straight tubular shape toward the front so that “blowback” extends forward with the kurukuru.

  If the cylindrical body roll 2 reaches the other end portion of the conduit 10 in this way, the cylindrical body 1 can be inserted over the line section of the conduit 10. Next, after the connection between the air source 20 and the distal end portion of the tubular body 1 is released, the tubular body roll 2 is wound around the tubular body 1 in a roll shape at one end or the other end of the conduit 10. When forming or pulling, a tubular body 1 is provided with a pulling material (not shown) such as a wire or a rope for pulling a new pipe drawn into the pipe 10 such as a vinyl chloride pipe or a polyethylene pipe. If it connects, pulling material can be penetrated over the through-line area of the pipe line 10 with collection | recovery of the cylindrical body 1. FIG. Next, after releasing the connection between the tubular body 1 and the traction material, the traction material is directly or indirectly connected to the new pipe, and the traction material is wound up to be newly installed in the pipe line 10 via the traction material. Pipes can be drawn and laid.

  In the above-described embodiment, the case where the cylindrical body 1 is directly wound into a roll shape to form the coreless cylindrical roll 2 has been described. However, as shown in FIG. The cylindrical body roll 4 having an axis is formed by winding up the cylindrical body 1, and as described above, the cylindrical body roll having the axis is supplied by supplying pressurized air to the cylindrical body 1 through the air source 20. 4 may be caused to roll in the conduit 10 so that the tubular body 1 is inserted through the conduit 10.

  Further, as shown in FIG. 3, the axial center 3 of the cylindrical body roll 4 having an axial center is rotatably supported at one end of the conduit 10 by using a stand 30, and the cylindrical body roll 4 has a cylindrical shape. You may make it supply pressurized air to the front-end | tip part of the body 1. FIG.

  In this case, the pressurized air is supplied to the tubular body 1 wound up by the tubular body roll 4 to expand the tubular body 1 into a tubular shape and extend it linearly. And the pressure air which acts on the expanded tubular cylindrical body 1 acts on the folding | returning part with the cylindrical body 1 drawn | fed out from the cylindrical body roll 4 which has an axial center, The folding | returning part of the cylindrical body 1 is made into Move forward. That is, the cylindrical body 1 is fed out from the cylindrical body roll 4 having an axis, and the cylindrical body roll 4 having an axis is rotated accordingly. Therefore, the tubular body roll 4 having an axial center continues to rotate and feeds the tubular body 1 so that the expanded tubular tubular body 1 is extended forward and folded back to the pipe line. 10 can be inserted through the other end.

  Also here, after connecting the traction material to the cylindrical body 1, for example, if the cylindrical body 1 is collected on the cylindrical body roll 4 side having an axial center, the traction material is inserted through the line section of the conduit 10. Therefore, after releasing the connection between the tubular body 1 and the traction material, the traction material is connected to the new pipe and the traction material is wound up, thereby drawing the new pipe into the conduit 10 and laying it. Can do.

  Furthermore, in the case where the cylindrical body roll 4 having the axial center is formed by winding the cylindrical body 1 around the axial center 3, as shown in FIG. The cylindrical body roll 4 having an axis may be rotated by rotating the wheel 5 in the pipeline 10 and running. Thereby, compared with the case where the cylindrical body roll 4 which has an axial center rolls the inside of the pipe line 10 directly, frictional resistance can be reduced and it can be moved smoothly.

  In this case, the rolling element may be spherical, hemispherical, or conical in addition to the disk-shaped wheel 5.

  Further, when the wheel 5 rotates and rolls, the cylindrical body roll 4 having an axial center is prevented from meandering in the pipe line 10 due to the magnitude of the resistance acting on the left and right wheels 5, respectively. The weight 6 is preferably provided along the inner peripheral surface with the center of gravity of 3 as the center.

  As shown in FIG. 5, the weight for preventing the meandering of the cylindrical body roll 4 may be a weight 61 that is rotatably suspended from the shaft center 3 via a wire or the like.

  Furthermore, in order to prevent meandering of the cylindrical body roll 4, as shown in FIG. 6, it extends forward to the axis 3 and bends the tip part slightly upward. The guide 7 may be rotatably supported. In this case, since the entire length L including the guide 7 is formed to be equal to or larger than the inner diameter D of the pipe line 10, the guide 7 always points in the axial direction of the pipe line 10. 4 meandering can be reliably prevented.

  Here, as the guide 7, in addition to extending only forward, the guide 7 may be partially extended backward, or may be extended evenly in the front-rear direction. In this case as well, the entire length L may be formed to be equal to or larger than the inner diameter D of the conduit 10 to prevent meandering in the conduit 10.

DESCRIPTION OF SYMBOLS 1 Tubular body 2 Tubular body roll 3 Axis center 4 Tubular body roll which has an axis 5 Wheel 6, 61 Weight 7 Guide 10 Pipe line 20 Air source

Claims (7)

  A cylindrical body roll obtained by winding the cylindrical body into a roll shape is disposed in the pipe line, and pressurized air is supplied to the inside of the cylindrical body to expand the cylindrical body into a tubular shape. In a pipe characterized by rolling in a road and inserting a tubular body into a pipeline, connecting a pulling material to the tubular body, pulling the tubular body, and laying the pulling material in the pipeline Connection method.   A cylindrical body roll having an axial center wound around the cylindrical body in a roll shape supports the axial center of the cylindrical body roll so as to be rotatable with respect to the pipe line, and is supplied with pressurized air inside the cylindrical body to form a cylindrical shape. The body is expanded into a tubular shape, and the tubular body roll is rotated to feed the tubular body into the pipeline. After the tubular body is folded back into the pipeline, the pulling material is connected to the tubular body. And pulling the tubular body and laying a traction material in the pipeline.   The in-pipe connection method according to claim 1, wherein the cylindrical body is wound into a roll shape around an axis and formed into a cylindrical roll having an axis.   The in-pipe connection method according to claim 3, wherein a rolling element having an outer diameter larger than the outer diameter of the cylindrical roll is fixed to both ends of the axial center of the cylindrical roll having the axial center. In-pipe connection method.   The in-pipe connection method according to claim 3 or 4, wherein a weight is fixed in the axial center.   The in-pipe connection method according to claim 4, wherein a weight is rotatably suspended on the axis.   5. The in-pipe connection method according to claim 4, wherein a guide extending in the insertion direction of the cylindrical body is rotatably supported on the axis.

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