JP2007230167A - Fixture for drawing regeneration pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method to enable to smoothly draw a regeneration pipe into an embedded attaching pipe even in a case that the embedded attaching pipe is perpendicularly connected to an embedded main pipe or the embedded attaching pipe has a step. <P>SOLUTION: In a method for regenerating the embedded attaching pipe by lining the inner surface of the embedded attaching pipe to be connected with an entrance of the attaching pipe formed at the embedded main pipe by the regeneration pipe made of a thermoplastic resin, a drawing fixture to be used in a case that the regeneration pipe is drawn into the embedded attaching pipe be passed through the embedded main pipe, is constructed of a top member 2 installed at the top end of the regeneration pipe 1 at the down stream side in a direction for drawing the regeneration pipe for closing the top end part and an auxiliary traction member 4 installed detachably at the top end of the top member 2 and the outer face in the top side of which is spherically formed. Further, a traction member for drawing the regeneration pipe 1 is connected to the top member 2 through the auxiliary traction member 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for rehabilitating a buried mounting pipe in which the inner surface of a buried mounting pipe connected to a mounting pipe port formed in the buried main pipe is lined with a rehabilitation pipe made of thermoplastic resin, and the rehabilitating pipe passes through the buried main pipe. The present invention relates to a jig for pulling a rehabilitation pipe used when being drawn into a buried mounting pipe.

  In general, a sewage pipe buried in the ground is composed of a buried main pipe communicating between manholes and a plurality of buried mounting pipes connected to the buried main pipe. It is provided in such a way as to communicate the ridge provided in the vicinity of the ground surface with the attachment pipe port formed in the buried main pipe. Unlike the buried main pipe and manhole, this buried mounting pipe has a small pipe diameter and is simply constructed, so that the inner surface is often damaged or cracked with aging. In addition, the connection point between the buried main pipe and the buried mounting pipe that were firmly attached at the beginning of construction (hereinafter, this part is referred to as the mounting pipe port) may be loosened and damaged due to subsequent ground changes, etc. In that case, rainwater or spring water may enter the buried main from the damaged or cracked area, and the allowable water volume of the buried main may be exceeded.

For such an aged buried pipe, the applicant, as shown in Patent Document 1, inserts the rehabilitated pipe into the buried pipe from the heel side and lines the buried pipe with the fitting pipe port. A lining method for mounting pipes is proposed. Moreover, as shown in Patent Document 2, a lining method for an embedded mounting pipe has also been proposed in which a rehabilitation pipe is inserted into an embedded mounting pipe through an embedded main pipe and the embedded mounting pipe is lined together with the mounting pipe port.
JP 2003-159750 A JP 2003-11223 A

  However, the buried attachment pipe rehabilitation method of Patent Document 1 has a drawback that it requires a lot of work steps and requires a lot of time for construction. In addition, in the method for rehabilitating the buried mounting pipe of Patent Document 2, although the construction time can be shortened, a retraction jig is attached to the tip of the pinched rehabilitation pipe, and a wire is connected to the retraction jig. Since the rehabilitation pipe is pulled into the buried mounting pipe by pulling the wire, the buried mounting pipe is connected to the axis of the buried main pipe perpendicular to the axis, or there is a step in the buried mounting pipe. In some cases, the retraction jig may interfere with the stepped portion or the periphery of the attachment tube port. In such a situation, when the wire is pulled, a large load is applied to the pulling jig, and the pulling jig may come off or may not be pulled further.

  The present invention has been made in view of such problems, even when the buried mounting pipe is connected orthogonally to the buried main pipe, or when there is a step in the buried mounting pipe, The present invention provides a jig for pulling a rehabilitation pipe that can smoothly draw the rehabilitation pipe into an embedded mounting pipe.

  The present invention relates to a method for rehabilitating a buried mounting pipe in which the inner surface of the buried mounting pipe connected to a mounting pipe port formed in the buried main pipe is lined with a rehabilitation pipe made of thermoplastic resin, and the rehabilitation pipe passes through the buried main pipe. A jig for pulling a rehabilitation pipe used for drawing into a buried mounting pipe, the pulling jig being provided at a tip end on the downstream side in the pull-in direction of the rehabilitation pipe and closing the tip part And a traction assisting member that is detachably provided on the distal end side of the distal end member and whose outer surface on the distal end side is a curved surface such as a spherical surface, a conical surface, or a truncated cone surface, and pulls the rehabilitation pipe The pulling member or hose to be attached is detachably connected to the tip member through the pulling auxiliary member.

  According to the present invention, when the rehabilitation pipe is drawn into the embedded mounting pipe from the tip side through the embedded main pipe into the embedded mounting pipe, if the traction assisting member interferes with the peripheral edge of the mounting pipe or the step of the embedded mounting pipe, it is connected to the tip member. An angle is generated between the pulling direction of the pulling wire and the axial direction of the tip member. At this time, by pulling the pulling wire, a bending force is generated on the tip member so as to coincide with the pulling direction of the pulling wire around the interference portion of the pulling assisting member with respect to the peripheral edge of the mounting pipe or the step edge, and the tip member Since the outer surface of the traction assisting member has a curved surface, the traction assisting member is pulled up while sliding the outer surface of the traction assisting member in contact with the periphery of the attachment tube opening or the periphery of the step. Interference with the periphery and step periphery can be overcome.

  Therefore, even if the traction assisting member interferes with the peripheral edge of the mounting pipe opening or the step of the embedded mounting pipe, the retraction pipe can be smoothly drawn into the embedded mounting pipe by releasing the interference of the traction auxiliary member by pulling the traction wire. it can.

  The present invention relates to a method for rehabilitating a buried mounting pipe in which the inner surface of the buried mounting pipe connected to a mounting pipe port formed in the buried main pipe is lined with a rehabilitation pipe made of thermoplastic resin, and the rehabilitation pipe passes through the buried main pipe. A jig for pulling a rehabilitation pipe used for drawing into a buried mounting pipe, the pulling jig being provided at a tip end on the downstream side in the pull-in direction of the rehabilitation pipe and closing the tip part The outer surface on the tip side is formed into a curved surface such as a spherical surface, a conical surface or a truncated cone surface, and a traction material or a hose for pulling the rehabilitation pipe is detachably connected to the tip member. To do.

  According to the present invention, when the tip member interferes with the peripheral edge of the mounting pipe port or the step edge of the buried mounting pipe when the rehabilitation pipe is drawn from the tip side through the buried main pipe into the buried mounting pipe, it is connected to the tip member. An angle is generated between the pulling direction of the pulling wire and the axial direction of the tip member. At this time, by pulling the pulling wire, a bending force is generated on the tip member so as to coincide with the pulling direction of the pulling wire, centering on the interference portion of the tip member with respect to the peripheral edge of the mounting pipe or the step, and the tip member Since the angle of the tip member is changed by turning, the outer surface of the tip member is a curved surface. Overcoming interference with the periphery.

  Therefore, even if the distal end member interferes with the peripheral edge of the mounting tube opening or the step of the embedded mounting tube, the retraction tube can be smoothly drawn into the embedded mounting tube by releasing the interference of the distal end member by pulling the pulling wire.

  According to the present invention, even when the buried mounting pipe is connected orthogonally to the buried main pipe or when the buried mounting pipe has a step, the rehabilitation pipe is smoothly drawn into the buried mounting pipe. Can do.

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

  First, as shown in FIG. 1, the rehabilitation pipe 1 is formed into a cylindrical shape by a thermoplastic resin such as polyvinyl chloride or high-density polyethylene, and in a state before being inserted into the embedded mounting pipe T, The cross-sectional shape is formed in a substantially elliptical shape having a smaller diameter than the inner diameter of the embedded mounting tube T. And the rehabilitation pipe | tube 1 has the performance which carries out shape recovery to a cylindrical state by heating to predetermined | prescribed shape memory temperature (for example, 80 degreeC). In addition, a substantially frustoconical diameter-enlarged portion 1 a having an outer diameter gradually increasing toward the rear end side is provided in advance at the rear end portion (upstream side in the pull-in direction) of the rehabilitation pipe 1. The diameter-enlarged portion 1a may be formed by integral molding in which the rear end portion of the rehabilitation pipe 1 is formed in a substantially truncated cone shape, or a resin molded product as a separate part previously molded in a substantially truncated cone shape. May be integrally attached to the rear end edge of the rehabilitation pipe 1 by fusion or the like.

  By the way, the distal end portion (downstream side in the retracting direction) of the rehabilitation pipe 1 is closed by the distal end member 2, and the rear end portion (the portion immediately above the enlarged diameter portion 1 a) is closed by the rear end member 3. That is, the opening on the front end side of the rehabilitation pipe 1 is closed by the front end member 2, while the opening on the rear end portion is closed by the rear end member 3, and the inside of the rehabilitation pipe 1 is maintained in a substantially airtight state. . Further, a pulling assisting member 4 made of a substantially hemispherical shell is fixed to the tip end side of the tip member 2. For this reason, the rehabilitation pipe 1 connects the connecting member 5 (see FIG. 4 and FIG. 5) to the tip member 2 and assists the pulling wire (traction material) 6 connected to the connecting member 5 as described later. By pulling and pulling through the member 4, the inside is maintained in a substantially airtight state and is inserted over the buried main pipe H and the buried mounting pipe T.

  As shown in FIG. 2, the distal end member 2 includes a substantially cylindrical insertion portion 21 that can be inserted into the distal end portion of the rehabilitation tube 1, and a disc-shaped end portion 22 that is integrally formed at the distal end of the insertion portion 21. A plurality of annular grooves 211 are formed on the outer circumferential surface of the insertion portion 21 over the entire circumference at intervals in the axial direction. For this reason, as shown by a chain line in FIG. 2 (b), the metal fastening band B is wound from the outside of the annular groove 211 and fastened with the insertion portion 21 inserted into the distal end portion of the rehabilitation pipe 1. Thus, the rehabilitating tube 1 can be deformed so as to be fitted in the outer peripheral groove 211, and the tip member 2 can be firmly attached to the rehabilitating tube 1. Therefore, it is possible to prevent the tip member 2 from dropping from the tip of the rehabilitation pipe 1 during the retraction operation of the rehabilitation pipe 1.

  On the other hand, a connecting hole (female screw) 22 a for connecting the connecting tool 5 of the pulling wire 6 is formed at the end portion 22 of the tip member 2. Therefore, when connecting the pulling wire 6, the connecting tool 5 of the pulling wire 4 is screwed into the connecting hole 22a. Further, the connecting hole 22a is also used as a hose connection portion of the diameter expansion steam hose (see FIG. 10) 13, and when the diameter expansion steam hose 11 is connected, the connection tool 5 is removed and the diameter expansion steam. The hose 13 is connected (a metal fitting (male screw) provided at the tip of the diameter expansion steam hose 13 is screwed). That is, at the time of the rehabilitation pipe insertion process, which will be described later, the coupling tool 5 of the pulling wire 6 is coupled to the coupling hole 22a (becomes the state shown in FIG. 1). The diameter-expanding steam hose 13 is connected to the hole 22a so that steam can be introduced into the rehabilitation pipe 1 (see FIG. 10).

  Moreover, when water vapor | steam is introduce | transduced into the rehabilitation pipe | tube 1 from the diameter expansion | swelling steam hose 13 connected to the connection hole 22a at the edge part 22 of the front-end | tip member 2, excess water vapor | steam and drain water are discharged | emitted out of a pipe | tube. A tube opening 22b for inserting an exhaust tube 91 (see FIG. 13) for insertion is formed, and a relatively small diameter wire for inserting a rear end member wire 7 extending from a rear end member 3 described later. An opening 22c is formed. Furthermore, a plurality of mounting holes (female screws) 22d for connecting a pulling assisting member 4 to be described later are provided on the end portion 22 of the tip member 2 so as to be located on the same radius from the axis.

  As shown in FIG. 3, the rear end member 3 has two metal disks 31 and 32 having openings 31 a and 32 a formed in the center, and is opposed to each other. A metal pipe 33 is installed over the openings 31a and 32a so as to be connected. In addition, a flexible film 34 formed of heat-resistant rubber or the like is provided on the outer peripheral edge of each of the disks 31 and 32 over the entire periphery. The inner surface of the flexible film 34 and the outer surface of the pipe 33 are provided. A sealed space 3x is formed between the two.

  Then, an insertion steam hose (heating medium introduction pipe) is formed in the opening 31a of the rear end side disk 31 (a disk located on the rear end side when attached to the rehabilitation pipe 1) constituting the rear end member 3. ) 8 is connected. This insertion steam hose 8 is connected to a steam generator / heater 12 (see FIG. 6) installed on the ground, and the steam introduced from the insertion steam hose 8 is inside the pipe 33 and the disc 32 on the tip side. It is led to the inside of the rehabilitation pipe 1 through the opening 32a.

  In addition, a relatively small-diameter metal tube 35 is installed over each of the disks 31 and 32, and the exhaust tube 9 for discharging excess water vapor or drain water in the rehabilitation pipe 1 to the outside of the pipe is a metal tube 35. And is introduced into the rehabilitation pipe 1.

  Further, a through hole 31b having one end opened to the sealed space 3x is formed in the disc 31 on the rear end side, and an air supply pipe 36 is connected to the through hole 31b. The air supply pipe 36 is connected to an air source such as a blower (not shown). When high-pressure air is supplied from the air supply pipe 36 to the sealed space 3x by driving the air source, as shown by a virtual line in FIG. The flexible film 34 expands toward the outer peripheral side, and the outer diameter of the rear end member 3 is increased. That is, when high-pressure air is supplied from the air supply pipe 36 to the sealed space 3x in a state where the rear end member 3 is inserted into the rear end portion immediately above the enlarged diameter portion 1a of the rehabilitation pipe 1, the flexible membrane 34 moves toward the outer peripheral side. The rear end member 3 is expanded and presses the inner surface of the rehabilitation pipe 1, whereby the rear end member 3 is prevented from being detached from the rear end part of the rehabilitation pipe 1, and the rear end part of the rehabilitation pipe 1 is closed. .

  Also, a rear end member wire (rear end member pulling member) 7 is coupled to the front end side disc 32 (a disc located on the front end side when mounted on the rehabilitation tube 1). The rear end member wire 7 extends to the distal end portion of the rehabilitated tube 1, is inserted into the wire opening 22 c formed in the end portion 22 of the distal end member 2, and is drawn out to the front end side of the rehabilitated tube 1. .

  As shown in FIGS. 4 and 5, the pulling assisting member 4 is formed of a substantially hemispherical shell having an opening 4 a formed by a ball notch, and covers the end portion 22 of the tip member 2 so as to cover the end portion 22 of the tip member 2. It has a diameter equivalent to the diameter of the end 22. A plurality of mounting legs 41 each having an insertion hole 41a are formed inside the traction assisting member 4 so as to correspond to the plurality of mounting holes 22d formed in the end portion 22 of the tip member 2. Has been. Therefore, when connecting the pulling assisting member 4 to the tip member 2, the connecting bolt 42 is screwed into each mounting hole 22 d of the end 22 through the insertion hole 41 a of the mounting leg 41. At this time, the connecting tool 5 of the pulling wire 6 connected to the tip member 2 is accommodated in the inner side without interfering with the auxiliary member 4 for pulling, and the pulling wire 6 is moved outward through the opening 4a. Pulled out.

  In this way, the rehabilitation pipe 1 in the stage before the rehabilitation work is performed, as shown in FIG. 1, the front end is the rear end member 3 by the front end member 2 to which the pulling auxiliary member 4 is connected. The pulling wire 6 and the rear end member wire 7 extend from the front end through the opening 4a of the pulling auxiliary member 4, respectively, and the insertion steam hose 8, the exhaust tube 9 and the rear end member extend from the rear end. Each air supply pipe 36 extends. Further, inside the rehabilitation pipe 1, the rear end member wire 7 passes from the rear end member 3 to the front end member 2, and the front end of the exhaust tube 9 is opened.

  Next, the lining work using the rehabilitation pipe 1 will be described. This lining operation is executed after high-pressure water cleaning of the inner surface of the buried mounting tube T and an in-pipe inspection by a television camera are performed. Moreover, this lining operation | work consists of a rehabilitation pipe insertion process, a flange forming apparatus carrying-in process, a mounting pipe mouth water stop process, and a rehabilitation pipe diameter expansion process. Furthermore, this lining operation may be performed after the inner surface of the buried main pipe H is lined by a similar rehabilitation pipe, or may be performed without lining the main pipe. In the embodiment described below, the latter case will be described for the sake of simplicity.

<Rehabilitation pipe insertion process>
In the rehabilitation pipe insertion step, a rehabilitation pipe 1 having a predetermined length is prepared on the ground on the manhole M side, while a winch 11 (see FIG. 6) for pulling the pulling wire 6 is installed on the side of the flange T1. Keep it.

  More specifically, the length of the rehabilitation pipe 1 prepared on the ground on the manhole M side is set slightly longer (about 500 mm longer) than the length of the buried mounting pipe T to be rehabilitated.

  On the other hand, a yakura (traction height adjusting device) 10 assembled by a plurality of metal pipes is installed in the upper part of the cage T1, and a pulley 10a around which the traction wire 6 is wound around the upper part of the yakura 10. Is mounted in a suspended state. That is, the pulling wire 6 is wound by the winch 11 through the pulley 10a. With this configuration, the rehabilitation pipe 1 can be pulled up to the mounting height position of the pulley 10a on the heel T1 side.

  As an operation for drawing the pulling wire 6 from the manhole M over the flange T1, for example, the pulling wire 6 and the rear end member wire 7 are connected to a wire material made of carbon fiber, and this wire is used as the wire T1. Through the manhole M together with the pulling wire 6 and the rear end member wire 7. Then, after pulling the pulling wire 6 from the wire, the tip of the pulling wire 6 is connected to the connecting tool 5 through the opening 4a of the pulling auxiliary member 4, and the connecting tool 5 is connected to the tip of the rehabilitation pipe 1. The tip member 2 is connected to the connecting hole 22a. On the other hand, the tip of the rear end member wire 7 is connected to the rear end member 3 through the opening 4 a of the pulling auxiliary member 4 and the wire opening 22 c of the tip member 2 and the inside of the rehabilitation pipe 1. In this state, the rear end member 3 is attached to the rear end portion of the rehabilitation pipe 1. As the mounting operation of the rear end member 3, as described above, high-pressure air is supplied from the air supply pipe 36 to the sealed space 3 x in a state where the rear end member 3 is inserted into the rear end portion of the rehabilitation pipe 1. As a result, the flexible membrane 34 expands toward the outer peripheral side and presses the inner surface of the rehabilitation pipe 1, and the rear end member 3 is prevented from coming off at the rear end of the rehabilitation pipe 1. The rear end of 1 is closed. Next, the insertion steam hose 8 is connected to the rear end member 3. Further, the pulling assisting member 4 is put on the tip member 2, and the pulling assisting member 4 is connected to the mounting hole 22 d of the tip member 2 via the connecting bolt 42.

  Note that the pulling wire 6 and the rear end member wire 7 may be drawn from the manhole M toward the flange T1 using the above-described wire material.

  In this state, the steam generation heater 12 is driven, and the generated steam is introduced into the rehabilitation pipe 1 through the insertion steam hose 8 and preheated, whereby the rehabilitation pipe 1 is flexible. Keep it like that. Then, as shown in FIG. 6, while feeding the rehabilitation pipe 1 into the manhole M, the winch wire 6 connected to the tip member 2 is passed through the buried main pipe H, the buried mounting pipe T, the flange T1 and the pulley 10a. Wind up with 11 and pull. At this time, the rear end member wire 7 is also pulled together with the pulling wire 6 by another winch (not shown).

  And in the process of inserting the rehabilitation pipe 1 from the embedding main pipe H to the embedding attachment pipe T, when the temperature of the rehabilitation pipe 1 is lowered and the flexibility is lowered, the rehabilitation pipe 1 is predetermined to the embedding attachment pipe T. It becomes difficult to pull in to the position. In particular, when water is present in the buried main pipe H, the temperature of the rehabilitation pipe 1 is rapidly lowered, and this phenomenon is remarkable.

  In order to avoid such a situation, when inserting the rehabilitation pipe 1 from the buried main pipe H to the buried mounting pipe T, the steam generating heater 12 is driven, and steam generated by the steam generating heater 12 is inserted into the steam hose for insertion. 8 is introduced into the rehabilitation pipe 1. As a result, the rehabilitation pipe 1 is maintained at a high temperature (for example, 80 ° C.) and continuously has flexibility, and is smoothly inserted from the buried main pipe H to the buried mounting pipe T.

  By the way, when the rehabilitation pipe 1 is inserted from the buried main pipe H into the buried mounting pipe T, the buried mounting pipe T is connected to the buried main pipe H at right angles as shown in FIG. In addition, when the traction assisting member 4 interferes with the peripheral edge of the attachment tube port Ta, an angle is generated between the traction direction of the traction wire 6 connected to the tip member 2 and the axial direction of the tip member 2. At this time, by pulling the pulling wire 6, the bending force is applied to the tip member 2 so as to coincide with the pulling direction of the pulling wire 6 around the contact interference portion of the pulling assisting member 4 with respect to the peripheral edge of the attachment tube port Ta. As shown in FIG. 8, the tip member 2 rotates and changes its angle. In addition, since the outer surface of the traction assisting member 4 is a spherical surface, the traction assisting member 4 is pulled up while the outer surface thereof is in sliding contact with the peripheral edge of the attachment tube port Ta.

  Therefore, even if the pulling assisting member 4 interferes with the peripheral edge of the mounting tube port Ta of the embedded mounting tube T, the tip member 2 is rotated so that the leading member 2 coincides with the pulling direction of the pulling wire 6 by pulling the pulling wire 6. At the same time, the traction assisting member 4 can get over the sliding edge of the attachment tube port Ta while sliding, and the rehabilitation tube 1 can be smoothly drawn into the embedded attachment tube T.

  Similarly, even when there is a step in the embedded mounting tube T, if the pulling assisting member 4 interferes with the periphery of the step, the tip member 2 rotates and the pulling assisting member 4 gets over while sliding on the step periphery. The rehabilitation pipe 1 can be smoothly drawn into the buried mounting pipe T.

  Incidentally, in the conventional case where the traction assisting member is not used, the case where the buried attachment pipe T is connected to the buried main pipe H at an angle of 60 degrees is the retraction limit of the rehabilitation pipe 1, but the traction assisting member 4 Even when the buried mounting pipe T is connected orthogonally to the buried main pipe H, the rehabilitation pipe 1 can be drawn into the buried mounting pipe T. Further, in the prior art that does not use the pulling auxiliary member, the rehabilitation pipe 1 could not be retracted if the pipe level difference of the buried mounting pipe T was 5% or more. Even when 20% of the pipe level difference is generated in T, the rehabilitation pipe 1 can be drawn into the buried mounting pipe T.

  This insertion process is performed until the enlarged diameter portion 1a of the rehabilitation pipe 1 comes into contact with the peripheral edge of the attachment pipe port Ta (see FIG. 9).

<Flange forming equipment loading process>
After the rehabilitation pipe insertion process, the rehabilitation pipe 1 is drawn into the buried mounting pipe T to the position where the enlarged diameter portion 1a of the rehabilitation pipe 1 contacts the peripheral edge of the mounting pipe port Ta, and then the flange forming apparatus carrying-in process is performed. .

  In this flange forming apparatus carrying-in step, first, as shown in FIG. 10, the connecting tool 5 connected to the connecting hole 22a of the tip member 2 is loosened and the pulling wire 6 is removed. Connect to. The diameter-expanding steam hose 13 is connected to a steam generating heater 12, and the steam generating heater 12 can drive the steam into the rehabilitating pipe 1 from the tip side. Further, the exhaust tube 91 is inserted into the rehabilitation pipe 1 through the tube opening 22 b of the tip member 2. Thereafter, the high-pressure air supplied to the sealed space 3x of the rear end member 3 is discharged to the atmosphere through the air supply pipe 36, and the manhole M is reduced in a state where the outer diameter of the rear end member 3 is reduced as shown in FIG. By pulling the steam hose 8 for insertion from the side, the rear end member 3 is detached from the rear end portion of the rehabilitation pipe 1 and recovered from the manhole M side. At the time of recovery, the rear end member wire 7 and the exhaust tube 9 also move to the manhole M side as the rear end member 3 moves to the manhole M side.

  When the rear end member 3 and the rear end member wire 7 are collected in this manner, the flange forming apparatus 14 prepared by connecting the pressure fluid introducing pipe 15 such as a pressure fluid, for example, high-pressure air is removed from the manhole M. It introduces into the buried main pipe H (see FIG. 12).

  Here, the flange forming device 14 is a packer made of a bag body made of rubber and hermetically sealed, and has a smaller diameter than the inner diameter of the buried main pipe H when no pressure fluid is introduced into the packer. It has a cylindrical shape. Then, by introducing a pressure fluid into the inside thereof, the diameter is expanded to a diameter approximately equal to or larger than the inner diameter of the buried main pipe H.

  As described above, the flange forming apparatus 14 to which the pressure fluid introduction pipe 15 is connected is drawn into the embedded main pipe H to a position facing the attachment pipe port Ta. As the pull-in operation of the flange forming device 14, a packer pulling wire 61 is connected to each side surface of the flange forming device 14, and one end of the packer pulling wire 61 is connected to the manhole M side (downstream side from the embedded mounting tube T (see FIG. 9 is pulled out to the manhole M ′ side) on the right side of 9 and the packer pulling wire 61 is pulled.

<Mounting pipe mouth water stop process / rehabilitation pipe diameter expansion process>
In this embodiment, the attachment pipe mouth water stop process and the rehabilitation pipe diameter increasing process are performed substantially simultaneously. Hereinafter, this process will be described.

  When the attachment pipe mouth water stop process is started, water vapor is introduced from the diameter expansion steam hose 13 into the rehabilitation pipe 1. The introduced water vapor flows out from the opening of the rear end edge of the enlarged diameter portion 1a in the rehabilitation pipe 1, and the enlarged diameter portion 1a is heated from the inside and outside to be softened.

  Next, the pressure fluid is introduced from the pressure fluid introduction pipe 15 into the flange forming apparatus 14 to expand the flange forming apparatus 14. Thereby, as shown in FIG. 13, the outer peripheral surface of the packer which is the flange forming device 14 presses the enlarged diameter portion 1a of the rehabilitated pipe 1 toward the periphery of the attachment pipe port Ta, and this enlarged diameter portion 1a is formed into a flange shape. And are closely attached to the periphery of the attachment tube port Ta. At this time, since the diameter-expanded portion 1a is sufficiently heated and softened first, it can be firmly pressed around the attachment tube port Ta. In addition, an adhesive material such as butyl rubber is applied in advance to the outer peripheral surface of the diameter-enlarged portion 1a (a portion that is in close contact with the periphery of the attachment tube port Ta). For this reason, the enlarged-diameter portion 1a having the flange shape is adhered to the periphery of the attachment tube port Ta, and the water stoppage of this portion can be obtained satisfactorily.

  Steam is continuously blown into the rehabilitation pipe 1 from the diameter expansion steam hose 13, whereby the rehabilitation pipe 1 is heated and softened. At this time, since the rear end opening of the rehabilitation pipe 1 is closed by the packer as the flange forming device 14, there is almost no leakage of water vapor from the rehabilitation pipe 1, and the entire rehabilitation pipe 1 is efficiently heated. . In this case, excess water vapor or drain water in the rehabilitation pipe 1 is discharged out of the pipe using the exhaust tube 91 inserted into the rehabilitation pipe 1 from the tube opening 22 b of the tip member 2.

  Thereafter, high-pressure air is introduced into the rehabilitation pipe 1 from the diameter expansion steam hose 13 so that the rehabilitation pipe 1 is expanded in diameter. Thereby, the rehabilitation pipe | tube 1 expands an outer diameter, and closely_contact | adheres to the inner surface of the embedded attachment pipe T (refer FIG. 14). Moreover, since the rehabilitation pipe | tube 1 is cooled with introduction | transduction of high pressure air, the rehabilitation pipe | tube 1 hardens | cures in the state closely_contact | adhered to the inner surface of the buried attachment pipe T, and this shape is maintained. Thereby, the inner surface of the buried mounting tube T is lined.

  Thereafter, the excessive rehabilitation pipe 1 existing in the ridge T1 is cut out together with the tip member 2, and the cutting edge is finished. Further, the pressure fluid is removed from the flange forming device 14 and the flange forming device 14 is pulled out and collected on the manhole M ′ side, and the lining work is completed by removing the arrow 10.

  As mentioned above, in this embodiment, in the insertion process of the rehabilitation pipe 1, by introducing water vapor into the rehabilitation pipe 1 through the insertion steam hose 8, the temperature of the rehabilitation pipe 1 is lowered and its flexibility is increased. Therefore, the rehabilitation pipe 1 can be easily pulled to a predetermined position in the buried mounting pipe T. As a result, the enlarged diameter part 1a of the rehabilitated pipe 1 can be drawn into the attachment pipe port Ta, and a water stop structure around the attachment pipe port Ta by the enlarged diameter part 1a can be obtained favorably. In addition, since the flange forming apparatus 14 can firmly press the enlarged diameter portion 1a around the mounting tube port Ta in a state where the enlarged diameter portion 1a is heated and softened, the enlarged diameter portion 1a follows the shape of the periphery of the mounting tube port Ta. It is possible to form and adhere closely to each other, and a high water-stopping property can be obtained around the attachment tube port Ta.

  In addition, when the pulling auxiliary member 4 is provided on the tip member 2, the buried mounting pipe T is connected to the buried main pipe H at a right angle, or the buried mounting pipe T has a slight level difference. Even if it exists, the rehabilitation pipe | tube 1 can be easily drawn in in the embedded attachment pipe T until the enlarged diameter part 1a contact | abuts to the periphery of the attachment pipe port Ta.

  In the above-described embodiment, the case where the pulling assisting member 4 is formed of a substantially hemispherical shell and the outer surface is a spherical surface is exemplified. However, other curved surfaces such as a conical surface and a truncated cone surface are exemplified. May be.

  Moreover, although the case where it comprised from the front-end | tip member 2 which can connect a pulling wire and the pulling auxiliary member 4 which can be connected to the front-end | tip member 2 was illustrated as a pulling jig, a tip is provided without providing a pulling auxiliary member. The outer surface of the downstream end portion of the member 2 in the retracting direction of the rehabilitating tube 1 may be formed as a curved surface, specifically, a spherical surface, a conical surface, or a truncated cone surface to serve as a pulling jig. Also in this case, although not shown in detail in the tip member 2, a tube for inserting the connection hole 22 a for connecting the connector 5 of the pulling wire 6 or the steam hose 13 for expanding the diameter, and the exhaust tube 91. The opening 22c for wires and the opening 22c for inserting the wire 7 for rear-end members are formed.

  Furthermore, in the above-described embodiment, the case where water vapor is introduced only from the rear end side of the rehabilitation pipe 1 has been described. Also good. Specifically, the diameter expansion steam hose 13 is connected to the connecting hole 22a of the tip member 2 instead of the pulling wire 6 so that the steam can be introduced into the rehabilitation pipe 1, and the diameter expansion steam hose. 13 may be pulled. At this time, the exhaust tube 91 is inserted into the rehabilitation pipe 1 from the tube opening 22 b of the tip member 2.

  In this case, the insertion steam hose 6 is not connected to the rear end member 3 that closes the rear end side of the rehabilitation pipe 1. For this reason, the opening 31a of the disk 31 on the rear end side and the opening of the metal tube 35 constituting the rear end member 3 are closed by a closing tool (not shown).

  As described above, the diameter expansion steam hose 13 and the exhaust tube 91 together with the rear end member wire 7 are connected to the wire as a work for drawing the diameter expansion steam hose 13 and the exhaust tube 91 from the manhole M over the flange T1. 91 may be connected, and this wire may be inserted from the flange T1 to the manhole M. And while connecting the front-end | tip of the steam hose 13 for diameter expansion to the connection hole 22a of the front-end | tip member 2 of the renovated pipe 1, the exhaust tube 91 is inserted in the renovated pipe 1 from the tube opening 22b of the front-end | tip member 2, The rear end member wire 7 may be connected to the rear end member 3 through the wire opening 22c of the front end member 2 and the inside of the rehabilitation pipe 1.

  Furthermore, although the case where water vapor was used as a heating medium for introducing and heating the rehabilitation pipe 1 into the buried attachment pipe T was described, it is not limited to water vapor but may be hot air. .

  As described above, according to the present invention, even when there is a step in the buried mounting pipe or when the buried mounting pipe is connected orthogonally to the buried main pipe, the rehabilitation pipe is replaced with the buried mounting pipe. Since it can be pulled in smoothly, the rehabilitation target range of the buried mounting pipe can be expanded and the rehabilitation work can be performed efficiently.

FIG. 3 is a side view of the rehabilitation pipe provided with one embodiment of the pulling jig of the present invention, with a part thereof broken together with a rear end member. It is the front view of the front-end | tip member of FIG. 1, and its half sectional view. It is a perspective view of the rear-end member of FIG. FIG. 2 is a half cross-sectional view showing a tip member and a pulling auxiliary member that constitute the pulling jig of FIG. 1 together with a coupling tool. FIG. 5 is an exploded half cross-sectional view showing the relationship between the tip member, the pulling assisting member, and the connector in FIG. 4. It is sectional drawing of an underground conduit explaining the rehabilitation pipe insertion process in the rehabilitation method of an embedded attachment pipe. It is sectional drawing of the attachment pipe port periphery explaining the state which the pulling auxiliary member interfered in the attachment pipe port in the rehabilitation pipe insertion process. It is sectional drawing of the attachment pipe opening periphery explaining the state which the pulling auxiliary member canceled the interference in the attachment pipe opening in the rehabilitation pipe insertion process. It is sectional drawing of an underground conduit after completion of the rehabilitation pipe insertion process. It is sectional drawing of an underground pipe line explaining the flange formation apparatus carrying-in process in the rehabilitation method of an embedded attachment pipe. It is sectional drawing of the attachment pipe port periphery explaining a flange formation apparatus carrying-in process. It is sectional drawing of an underground pipe line explaining the attachment pipe mouth water stop process in the rehabilitation method of a buried attachment pipe. It is sectional drawing of the periphery of an attachment pipe port explaining an attachment pipe mouth water stop process. It is sectional drawing of the attachment pipe port periphery explaining the rehabilitation pipe diameter expansion process in the rehabilitation method of a buried attachment pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rehabilitation pipe 2 End member 22a Connection hole 3 Rear end member 4 Traction auxiliary member 5 Connection tool 6 Traction wire (traction material)

Claims (2)

  In the method of rehabilitating a buried mounting pipe, the inner surface of the buried mounting pipe connected to the mounting pipe port formed in the buried main pipe is lined with a rehabilitation pipe made of thermoplastic resin, the rehabilitated pipe passes through the buried main pipe and becomes a buried mounting pipe. A retraction pipe pulling jig used for retracting, wherein the pulling jig is provided at a distal end on the downstream side in the retraction direction of the rehabilitation pipe and closes the front end, and the front end A traction assisting member that is detachably provided on the distal end side of the member and whose outer surface on the distal end side is formed on a curved surface of a curved body such as a spherical surface, a conical surface, or a truncated cone surface, A rehabilitation pipe traction jig, wherein a hose is detachably connected to a tip member through a traction assisting member.   In the method of rehabilitating a buried mounting pipe, the inner surface of the buried mounting pipe connected to the mounting pipe port formed in the buried main pipe is lined with a rehabilitation pipe made of thermoplastic resin, the rehabilitated pipe passes through the buried main pipe and becomes a buried mounting pipe. A retraction pipe pulling jig used when retracting, the pulling jig is a tip member that is provided at the downstream end of the rehabilitation pipe in the pulling direction and closes the tip. An outer surface on the distal end side is formed into a curved surface such as a spherical surface, a conical surface, or a truncated cone surface, and a traction material or a hose for pulling the rehabilitation tube is detachably connected to the distal end member. Towing jig.

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