JP6713296B2 - Obturator and rehabilitation method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an obturator and a pipeline rehabilitation method, and more particularly, to an obturator for obstructing a hole formed in a rehabilitation tube integrated with an existing tube by using a filler and a pipeline rehabilitation method using the same. ..

Conventionally, as a pipeline rehabilitation method to rehabilitate an aged existing pipe, a rehabilitation pipe is provided inside the existing pipe, and then a filler is injected between the inner surface of the existing pipe and the outer surface of the rehabilitation pipe to integrate them. A method for rehabilitating a pipeline is known. As a method for injecting the filler between the inner surface of the existing pipe and the outer surface of the rehabilitating pipe, a method of introducing a filler injecting hose from the pipe end of the rehabilitating pipe is known in Patent Document 1 and the like.

However, when it is difficult to insert the injection hose between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102, such as when the existing pipe 100 is meandering, as shown in FIG. In some cases, a filler injection hole 106 is formed in 102, and the filler 104 is injected into the filler injection hole 106 by inserting the tip portion 82 of the injection gun 80 from inside the rehabilitation pipe 102. As shown in FIG. 14B, a flange portion 84 having a sponge layer 86 is provided on the tip portion 82 of the injection gun 80. When the filler 104 is injected, the tip 82 of the injection gun 80 is inserted into the filler injection hole 106 so that the flange portion 84 is pressed against the inner surface of the rehabilitation pipe 102. The filler 104 discharged from the outlet 88 is prevented from leaking into the rehabilitation pipe 102.

Although illustration is omitted, when the existing pipe is bent in the vertical direction, it is necessary to perform air bleeding at the crest portion when injecting the filler. Therefore, it is common practice to form an air vent hole at the top of the rehabilitating pipe in the mountain portion of the existing pipe and attach the air vent pipe to the air vent hole.

The holes such as the filler injection hole and the air vent hole formed in the rehabilitating pipe as described above are appropriately closed after the filler is injected in order to prevent water leakage from the rehabilitating pipe or infiltration of water into the rehabilitating pipe. Need to leave. When closing the hole formed in the rehabilitation pipe, a method is known in which an obturator is fitted and fixed in the hole of the rehabilitation pipe.

Patent Document 2 discloses an example of an obturator (obstruction member) that obstructs a hole formed in a rehabilitation pipe. The obturator of Patent Document 2 is a member for closing a through hole for attaching a support material that supports a rehabilitation pipe (lining pipe) from the inside when injecting a filler (backfilling material), and is a main body. And a lid that is attachable to and detachable from the unit. The main body is formed into a substantially cylindrical shape with one opening and the other having a bottom. An internal thread is formed on the inner peripheral surface of the main body, and a flange is formed on the outer periphery of the opening. Further, a male screw is formed on the outer peripheral surface of the lid portion. Then, the lid portion is screwed into the main body portion, so that the opening of the main body portion is closed and a hollow space is formed inside the main body portion.
Patent No. 2843959 JP, 2005-175487, A

The obturator of Patent Document 2 can be used only for simply obstructing the hole of the rehabilitating pipe, and no consideration is given to efficiently injecting the filler using the obturator.

Therefore, a primary object of the present invention is to provide a novel obturator and conduit rehabilitation method.

Another object of the present invention is not only to close the hole formed in the rehabilitating pipe, but also to improve workability when injecting the filler between the inner surface of the existing pipe and the outer surface of the rehabilitating pipe. And a method for rehabilitating a pipeline.

A first aspect of the present invention is an obturator for closing a filler injection hole or an air vent hole formed in a rehabilitating pipe that is integrated with an existing pipe using a filler, and is a filler injection formed in the rehabilitating pipe. A receiving frame member fixed to the hole or the air bleeding hole , and a lid member attached to the receiving frame member. The receiving frame member is formed in a cylindrical shape with both ends open, and a filler injection hole or an air formed in the rehabilitation pipe. It is formed integrally with the distal end of the filling material injection gun or the outer peripheral surface of the one end of the first cylinder and the one end of the first cylinder while being inserted into the vent hole. The first portion at a position where the surface is in contact with the inner surface of the rehabilitating pipe, the first fitting portion formed on the inner peripheral surface of the first tubular portion, and the other end portion side of the first fitting portion. The lid member includes a first seal ring provided on the inner peripheral surface of the tubular portion, and the lid member seals the second tubular portion and the second tubular portion of the cylindrical shape which are inserted into the first tubular portion. And a second fitting portion formed on the outer peripheral surface of the second tubular portion and fitted with the first fitting portion.

In the first invention, the obturator includes a receiving frame member and a lid member, and uses a filling material to obstruct a hole formed in the rehabilitation pipe integrated with the existing pipe. The receiving frame member includes a first tubular portion formed in a cylindrical shape with both ends open. A flange portion protruding outward is formed at one end of the first tubular portion. A first fitting portion is formed on the inner peripheral surface of the first tubular portion, and a first seal ring is provided at a position closer to the other end portion than the first fitting portion. On the other hand, the lid member includes a cylindrical second tubular portion whose one end is sealed by the sealing portion. A second fitting portion that fits with the first fitting portion is formed on the outer peripheral surface of the second tubular portion.

When injecting the filling material, first, the receiving frame member of the obturator is fixed to the hole of the rehabilitation pipe. At this time, the first tubular portion is inserted into the hole of the rehabilitating pipe until the surface on the other end side of the collar portion comes into contact with the inner surface of the rehabilitating pipe. Then, the tip portion of the filling material injection gun or the air bleeding tube is inserted into the first tubular portion. Since the first seal ring is provided in the first cylinder portion, when the tip end portion of the injection gun or the air bleeding tube is inserted into the first cylinder portion, the first cylinder portion and the tip end portion of the injection gun or the air bleeder are removed. The first seal ring is compressed between the tube and the pipe, and water is reliably stopped during this period. That is, at the time of injecting the filler, the filler is reliably prevented from leaking into the rehabilitation pipe.

After injecting the filling material, the second tubular portion of the lid member is inserted into the first tubular portion of the receiving frame member, and the first fitting portion and the second fitting portion are fitted to each other, so that the receiving frame member Attach the lid member. As a result, the hole formed in the rehabilitation pipe is easily closed.

According to the first aspect of the present invention, it is possible to easily insert or install the tip of the filling material injection gun or the air bleeder into the hole of the rehabilitating pipe in a state where leakage of the filling material is appropriately prevented. That is, the hole formed in the rehabilitation pipe can be easily closed, and workability at the time of injecting the filler between the inner surface of the existing pipe and the outer surface of the rehabilitation pipe can be improved.

A second invention is according to the first invention, wherein the outer diameter of the tip portion of the injection gun and the outer diameter of the air bleeding tube are the same or substantially the same, and the first tubular portion is It can also be used as a tip part and a receiving part for an air vent tube.

In the second invention, the outer diameter of the tip portion of the injection gun and the outer diameter of the air bleeding tube are the same or substantially the same, and the first tube portion of the receiving frame member is the tip portion of the injection gun and the air bleeding tube. It can also be used as a receiving part of.

According to the second aspect of the invention, it is not necessary to separately manufacture the obturator for the filler injection hole or the air vent hole, and the obturator of the same standard can be used for the filler injection hole and the air vent hole.

A third invention is according to the first or second invention, and a surface of the flange portion on one end side is formed in a flat shape and is brought into contact with a flange portion formed at a distal end portion of the injection gun. .. Further, the surface of the flange portion on the other end side is bonded to the inner surface of the rehabilitation pipe.

In the third aspect of the invention, the surface on the one end side of the flange portion that serves as the receiving portion of the flange portion of the injection gun is formed in a flat shape. When the sponge layer of the flange portion is pressed against the surface on the one end side of the flange portion, the flat surfaces come into contact with each other, so that the entire sponge layer can be compressed substantially uniformly. Therefore, the waterproofness of the sponge layer is improved.

A fourth invention is according to any one of the first to third inventions, and further includes a second seal ring provided on the outer peripheral surface of the second tubular portion at a position closer to one end than the second fitting portion. Further prepare.

In the fourth invention, the second tubular portion of the lid member includes a second seal ring provided at a position closer to the one end than the second fitting portion. When the lid member is attached to the receiving frame member, the second seal ring is compressed between the inner peripheral surface of the first tubular portion and the outer peripheral surface of the second tubular portion, and the water blocking property is secured during this period.

According to the fourth aspect of the invention, since the second seal ring is provided, even if the internal water pressure acts on the obturator after the start of water flow to the rehabilitation pipe, water leakage from the rehabilitation pipe is reliably prevented. In addition, even if groundwater or the like is flooded from the outside of the existing pipe due to an earthquake or the like, the flooding of the rehabilitation pipe is reliably prevented.

5th invention is a pipeline rehabilitation method using the obturator which concerns on 1st invention, Comprising: (a) The step of laying a rehabilitation pipe in an existing pipe, (b) After step (a), a rehabilitation pipe A filling material injection hole is formed in the filling material injection hole, the first tubular portion of the receiving frame member of the obturator is inserted into the filling material injection hole, and the surface of the receiving frame member on the other end side of the receiving frame member and the inner surface of the rehabilitating pipe are bonded together. After the step of (c) step (b), which is adhesively joined and fixed using , the tip of the filling material injection gun is inserted into the first tubular portion, and the inner surface of the existing pipe and the outer surface of the rehabilitation pipe are connected. And (d) after step (c), removing the injection gun from the first tubular portion and attaching the lid member of the obturator to the receiving frame member. Is.

According to the fifth aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and not only the filler injection hole formed in the rehabilitation pipe can be easily closed, but also the leakage of the filler can be appropriately prevented and rehabilitation is performed. The tip of the filling material injection gun can be easily inserted into the hole of the tube.

A sixth invention is a pipeline rehabilitation method using the obturator according to the first invention, wherein (a) a step of laying a rehabilitation pipe in an existing pipe, (b) a step (a), and then a rehabilitation pipe An air bleeding hole is formed at the top, and the first tube portion of the receiving frame member of the obturator is inserted into the air bleeding hole, and the surface of the flange of the receiving frame member on the other end side and the inner surface of the rehabilitating pipe are bonded together. Using adhesive bonding and fixing, (c) after step (b), inserting and attaching the air bleeder tube to the first tube portion, (d) after step (c), existing pipe After the step of injecting the filling material between the inner surface of the and the outer surface of the rehabilitating pipe, and (e) step (d), the air bleeding pipe is pulled out from the first tubular portion, and the cover member of the obturator is attached to the receiving frame member. A method for rehabilitating a pipeline, which comprises the step of attaching.

According to the sixth aspect of the present invention, the same effect as that of the first aspect of the invention is exhibited, and not only the air vent hole formed in the rehabilitating pipe is closed, but also leakage of the filler is appropriately prevented, and An air vent tube can be easily installed in the hole.

According to the present invention, it is possible to easily insert or install the tip of the filling material injection gun or the air bleeding tube into the hole of the rehabilitating pipe while appropriately preventing the leakage of the filling material. That is, the hole formed in the rehabilitating pipe can be easily closed, and the workability at the time of injecting the filler between the inner surface of the existing pipe and the outer surface of the rehabilitating pipe can be improved.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

It is an illustration figure which shows a mode that the hole formed in the rehabilitation pipe|tube was closed using the obturator which is one Example of this invention. It is an axial sectional view showing the state where the rehabilitation pipe was provided in the existing pipe. It is a radial direction sectional view showing the state where the rehabilitation pipe was provided in the existing pipe. It is an illustration figure which shows an example of the member which forms a rehabilitation pipe|tube, (A) is sectional drawing of a strip, (B) is sectional drawing of a joiner. It is sectional drawing which shows the state which joined the strip with the joiner. It is an illustration figure which shows the obturator which is one Example of this invention, (A) is a perspective view of an obturator, (B) is sectional drawing of an obturator. It is an illustration figure which shows the receiving-frame member with which the obturator of FIG. 6 is equipped, (A) is a side view of a receiving-frame member, (B) is sectional drawing of a receiving-frame member. It is an illustration figure which shows the lid member with which the obturator of FIG. 6 is equipped, (A) is a side view of a lid member, (B) is sectional drawing of a lid member. It is an illustration figure for explaining a pipeline rehabilitation method using an obturator, and shows a state where a filler injection hole is formed in a rehabilitation tube provided in an existing tube. It is an illustration figure which shows the construction procedure following FIG. It is an illustration figure which shows the construction procedure following FIG. It is an illustration figure which shows the construction procedure in an air bleeding part. It is an illustration figure which shows the construction procedure following FIG. (A) is an illustration showing a state of injecting a filler through a filler injection hole formed in a rehabilitating pipe in a conventional method, and (B) is an illustration showing an appearance of a filler injection gun. ..

Referring to FIG. 1, an obturator 10 which is an embodiment of the present invention includes a receiving frame member 12 and a lid member 14, and is formed on a rehabilitating pipe 102 integrated with an existing pipe 100 by using a filler 104. It is used to close the open holes 106 and 108. Further, as will be described later in detail, the receiving frame member 12 of the obturator 10 is for inserting or installing the distal end portion 82 of the injection gun 80 or the air bleeding tube 90 into the holes 106 and 108 in a state of having water blocking property. Is also used (see FIGS. 10 to 14).

First, prior to specific description of the obturator 10, an example of the rehabilitation pipe 102 and members 50 and 60 constituting the rehabilitation pipe 102 will be described.

As shown in FIGS. 2 and 3, in the rehabilitation pipe 102, a strip (belt plate member) 50 is spirally wound, and side edges thereof are connected using a joiner (fitting member) 60. Thus, the pipe is manufactured in the existing pipe 100. Then, a cement milk-based filler (backing material) 104 is injected between the inner surface of the existing pipe 100 and the outer surface of the rehabilitating pipe 102 to form a composite pipe in which the existing pipe 100 and the rehabilitating pipe 102 are integrated. Is formed. As the filler 104, a two-liquid mixed type filler or the like is used.

Further, a spacer 110 is provided at the top between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102. The spacer 110 forms a guide passage for introducing an injection hose for the filling material 104 between the existing pipe 100 and the rehabilitation pipe 102, and prevents the rehabilitation pipe 102 from floating due to the injected filling material 104. In addition, the strength of the formed rehabilitation pipe 102 is improved. However, as will be described later, in this embodiment, the filler 104 is injected from the filler injection hole 106 formed in the rehabilitation pipe 102, and thus the spacer 110 is not necessarily provided.

As shown in FIG. 4(A), the strip 50 includes a strip-shaped strip body 52, and is formed by extrusion molding of synthetic resin such as hard vinyl chloride. The first main surface 52 a of the strip body 52 constitutes an inner surface of the rehabilitation pipe 102. Further, a plurality of ribs 54 arranged at predetermined intervals in the width direction are formed on the second main surface 52b of the strip body 52. Further, on both side edge portions of the strip body 52, first engaging portions 56 that are fitted with second engaging portions 64 of a joiner 60 described later are formed. The ribs 54 and the first engaging portions 56 are formed over the entire length of the strip body 52 in the longitudinal direction.

Further, as shown in FIG. 4(B), the joiner 60 includes a belt-shaped joiner main body 62 and is formed by extrusion molding of synthetic resin such as hard vinyl chloride. The first main surface 62 a of the joiner main body 62 constitutes the inner surface of the rehabilitation pipe 102 together with the first main surface 52 a of the strip 50. In addition, second engaging portions 64 that are fitted to the first engaging portions 56 of the strip 50 are formed on both side edges of the joiner body 62. The second engaging portion 64 is provided with a water stop material 66 such as an elastomer. Further, a U-shaped groove portion 68 protruding toward the second main surface 62b side and a flexible portion 70 connecting the second main surfaces 62b to each other so as to cover the entire groove portion 68 are provided in the central portion of the joiner main body 62. To be The second engagement portion 64, the water blocking material 66, the groove portion 68, and the flexible portion 70 are formed over the entire length of the joiner body 62 in the longitudinal direction.

However, the specific configurations and shapes of the strip 50 and the joiner 60 described above are merely examples, and can be appropriately changed. Further, it is not always necessary to use the joiner 60 to connect the side edges of the strip 50 to each other, and the side edges of the strip 50 can be directly connected to each other by forming the fitting portions to be fitted to each other on both side edges of the strip 50. You may make it connect.

When forming the rehabilitation pipe 102 in the existing pipe 100, as shown in FIG. 5, the first engaging portion 56 of the strip 50 and the second engaging portion of the joiner 60 are wound while spirally winding the strip 50. The side edges of the strip 50 are connected to each other by the joiner 60 by fitting together with 64. Then, as described above, the existing pipe 100 and the rehabilitation pipe 102 are integrated by injecting the filler 104 between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102. In this embodiment, the filler 104 is injected through the filler injection hole 106 (see FIG. 9) formed in the rehabilitation pipe 102. The obturator 10 closes the filler injection hole 106 and keeps the tip 82 of the injection gun 80 (see FIG. 14B) of the filler 140 waterproof against the filler injection hole 106. It is used to insert it.

Hereinafter, the configuration of the obturator 10 will be specifically described with reference to FIGS. 6 to 8. As shown in FIG. 6, the obturator 10 includes a receiving frame member 12 fixed to the filler injection hole 106 formed in the rehabilitation pipe 102, and a lid member 14 attached to the receiving frame member 12. The obturator 10 is made of synthetic resin such as hard vinyl chloride.

As shown in FIG. 7, the receiving frame member 12 includes a first tubular portion 20 formed in a cylindrical shape with both ends open. The first tubular portion 20 is a portion that is inserted into the filler injection hole 106 of the rehabilitation pipe 102, and the outer diameter thereof is set to be substantially the same as the diameter of the filler injection hole 106. The outer diameter of the first tubular portion 20 is, for example, 45 mm, and the axial length thereof is, for example, 20 mm. Further, the lid member 14 is fitted into the first tubular portion 20 from one end side (the inside of the rehabilitation pipe 102 ), but before the lid member 14 is attached, the first tubular portion 20 has the injection gun 80. Can be received. The inner diameter of the first tubular portion 20 is set to be substantially the same as the outer diameters of the lid member 14 and the tip portion 82 of the injection gun 80, and is, for example, 36 mm. However, the inner peripheral surface of the first tubular portion 20 is slightly enlarged in diameter on the one end side so that the lid member 14 and the tip portion 82 of the injection gun 80 and the like can be easily inserted.

An annular flange 22 that projects outward is formed at one end of the first tubular portion 20. When the receiving frame member 12 is fixed to the filler injection hole 106, the surface (the other end surface) 22b on the other end side of the collar portion 22 is brought into contact with the inner surface of the rehabilitation pipe 102, and the contact surfaces are adhesively joined to each other. .. Further, the collar portion 22 is formed in a flat plate shape, and a surface (one end surface) 22a on the one end side thereof is a flat shape.

A female screw (first fitting portion) 24 is formed on the inner peripheral surface of the first tubular portion 20 at the central portion in the axial direction. An annular groove extending in the circumferential direction is formed on the inner peripheral surface of the first tubular portion 20 at a position closer to the other end than the female screw 24, and the first seal ring 26 is provided in the annular groove.

Further, on the outer peripheral surface of the first tubular portion 20, an annular recess portion 28 having a step surface 28a facing the one end portion side (the flange portion 22 side) is formed. In addition, a plurality of (two in this embodiment) projecting ridges 30 in the form of a flat plate extending along the axial direction are formed in the recess 28.

On the other hand, as shown in FIG. 8, the lid member 14 includes a second tubular portion 32 formed in a short cylindrical shape. One end of the second tubular portion 32 is sealed by a disc-shaped sealing portion 34. The axial length of the second tubular portion 32 is set shorter than the axial length of the first tubular portion 20 of the receiving frame member 12, and is, for example, 12.5 mm.

On the outer peripheral surface of the second tubular portion 32, a male screw (second fitting portion) 36 that is screwed (fitted) with the female screw 24 of the first tubular portion 20 is formed. An annular groove extending in the circumferential direction is formed on the outer peripheral surface of the second tubular portion 32 at a position closer to one end than the male screw 36, and a second seal ring 38 is provided in the annular groove. Further, two jig holes 40 having a circular cross section, which are open to the one end portion side, are formed in the one end surface 34a of the sealing portion 34.

As shown in FIG. 6, the receiving frame member 12 and the lid member 14 are assembled by inserting the second tubular portion 32 into the first tubular portion 20 and screwing the female screw 24 and the male screw 36. Be done. In the state where the receiving frame member 12 and the lid member 14 are integrated, the one end surface 22a of the collar portion 22 and the one end surface 34a of the sealing portion 34 are flush with each other. Then, the second seal ring 38 is compressed between the inner peripheral surface of the first cylindrical portion 20 and the outer peripheral surface of the second cylindrical portion 32, and the water blocking property is secured during this period.

Next, with reference to FIG. 9 to FIG. 11, a method of rehabilitating a conduit using the obturator 10 will be described. As shown in FIG. 9, when rehabilitating the existing pipe 100, a spacer 110 is first installed on the top of the inner surface of the existing pipe 100 as before, and then the rehabilitating pipe 102 is installed along the inner surface of the existing pipe 100. Lay it. That is, the strip 50 is spirally wound and the side edges thereof are connected by the joiner 60, whereby the rehabilitation pipe 102 is laid inside the existing pipe 100. Then, the filler injection hole 106 is bored in the rehabilitation pipe 102 using a punching machine. The filler injection holes 106 may be formed, for example, every 2 to 3 m in the pipe axis direction, and may be formed in a staggered arrangement in which they are alternately displaced from the pipe top of the rehabilitation pipe 102 by about 10 cm in the circumferential direction. In addition, a filler stopper 112 or the like that seals between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102 is appropriately provided at the pipe end portion of the rehabilitation pipe 102.

After the filler injection holes 106 are formed in the rehabilitation pipe 102, the receiving frame member 12 of the obturator 10 is fixed to each of the filler injection holes 106 as shown in FIG. 10(A). Here, the first tubular portion 20 of the receiving frame member 12 is inserted into the filling material injection hole 106 from the inside of the rehabilitation pipe 102, and the other end surface 22 b of the collar portion 22 and the inner surface of the rehabilitation pipe 102 are bonded using the adhesive 114. To join.

Subsequently, as shown in FIG. 10(B), the tip of the injection gun 80 (see FIG. 14(B)) of the filling material 104 with respect to the first tubular portion 20 of the receiving frame member 12 fixed in the filling material injection hole 106. The part 82 is inserted. Then, with the sponge layer 86 of the flange portion 84 of the injection gun 80 being pressed against the one end surface 22a of the collar portion 22, between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102 from the discharge port 88 of the injection gun 80. Filling material 104 is injected into. It should be noted that the filler 104 may be injected from the filler injection hole 106 on the downstream side and sequentially moved to the upstream side. Further, the filling material 104 may be injected stepwise in a plurality of times so that the filling material 104 is not injected too much from one filling material injection hole 106 at one time.

Here, when injecting the filling material 104, the tip portion 82 of the injection gun 80 is directly inserted into the filling material injection hole 106 and the sponge layer 86 of the flange portion 84 pressed against the inner surface of the rehabilitation pipe 102 is used as in the conventional case. If only the water is stopped, the water may be insufficient or unstable and the filler 104 may leak into the rehabilitation pipe 102. On the other hand, in this embodiment, the tip end portion 82 of the injection gun 80 is inserted into the first tubular portion 20 of the receiving frame member 12. Since the first seal ring 26 is provided in the first cylinder portion 20, when the tip end portion 82 of the injection gun 80 is inserted into the first cylinder portion 20, the first cylinder portion 20 and the tip end portion 82 of the injection gun 80 are inserted. The first seal ring 26 is compressed between and, and water is reliably stopped during this period. That is, by using the receiving frame member 12 of the obturator 10, it is possible to easily insert the tip end portion 82 of the injection gun 80 into the filler injection hole 106 in a water-proof state.

When the sponge layer 86 is directly pressed against the inner surface of the rehabilitating pipe 102 as in the conventional case, the inner surface of the rehabilitating pipe 102 is curved while the inner surface of the rehabilitating pipe 102 is curved. Only part can be compressed. On the other hand, in this embodiment, since the one end surface 22a of the flange portion 22 of the receiving frame member 12 is formed in a flat shape, the sponge layer 86 of the flange portion 84 is pressed against the one end surface 22a of the flange portion 22. Since the flat surfaces are in contact with each other, the entire sponge layer 86 can be compressed substantially uniformly. Therefore, the waterproofness of the sponge layer 86 is improved.

That is, in this embodiment, the double seal between the water stoppage of the first seal ring 26 and the water stoppage of the sponge layer 86 of the injection gun 80 can reliably prevent the filler 104 from leaking into the rehabilitation pipe 102.

Regarding the filler injection hole 106 for which the final injection work of the filler 104 has been completed, after the injection gun 80 is extracted from the first cylinder portion 20 of the receiving frame member 12, as shown in FIG. A rubber plug 116 or the like is inserted into 20 to temporarily seal the filling material injection hole 106 and wait until the filling material 104 is cured.

After the filling material 104 has hardened, the rubber plug 116 is pulled out from the first tubular portion 20, as shown in FIG. At this time, since the hollow portion 28 having the step surface 28a facing the one end side is formed on the outer peripheral surface of the first tubular portion 20, the step surface 28a is formed by the filler 104 that has entered the hollow portion 28. Is locked, the retaining effect against the force of pulling the receiving frame member 12 toward the one end side is exerted, and the receiving frame member 12 is prevented from coming off from the filler injection hole 106.

Then, as shown in FIG. 11E, a putty 120 such as an epoxy caulking material is embedded in the void 118 formed by pulling out the rubber plug 116.

Then, before the putty 120 is cured, the lid member 14 is screwed into the receiving frame member 12 as shown in FIG. That is, the lid member 14 is attached to the receiving frame member 12 by inserting the second tubular portion 32 of the lid member 14 into the first tubular portion 20 of the receiving frame member 12 and screwing the female screw 24 and the male screw 36 together. For example, a rod-shaped jig such as a screwdriver (driver) may be inserted into the jig hole 40 formed in the lid member 14 to rotate the lid member 14. At this time, since the protrusion 30 extending along the axial direction is formed on the outer peripheral surface of the first tubular portion 20, the protrusion 30 is locked by the filling material 104 that has entered the recess 28. Thus, the effect of preventing rotation of the receiving frame member 12 in the circumferential direction is exerted, and the receiving frame member 12 is prevented from coming off from the filler injection hole 106. When attaching the lid member 14, it is preferable to apply an adhesive to the male screw 36 of the lid member 14. Thereby, the receiving frame member 12 and the lid member 14 are more firmly fixed.

When the final injecting work of the filling material 104 is completed and the attaching work of the lid members 14 to all the receiving frame members 12 is completed, the reassembling work of the existing pipe 100 is completed by appropriately performing the tidying up work.

After the water passage to the rehabilitation pipe 102 is started, the second seal ring 38 is provided between the inner peripheral surface of the first tubular portion 20 and the outer peripheral surface of the second tubular portion 32. Even if internal water pressure acts on the water, it is possible to reliably prevent water leakage from the rehabilitation pipe 102. Further, even if groundwater or the like is flooded from the outside of the existing pipe 100 due to an earthquake or the like, the flooding of the rehabilitation pipe 102 is reliably prevented.

Further, the obturator 10 can be used for the air vent hole 108 instead of being used for the filler injection hole 106. That is, when the existing pipe 100 is bent in the vertical direction, an air vent hole 108 is formed at the top of the rehabilitation pipe 102 in the mountain portion of the existing pipe 100 when the filler 104 is injected, and the air vent hole 108 is formed. Attach the air vent tube 90 to the. The obturator 10 is used not only to close the air vent hole 108 but also to install the air vent tube 90 in a state of having waterproofness with respect to the filler injection hole 106.

Hereinafter, another example of the conduit rehabilitation method using the obturator 10 will be described with reference to FIGS. 12 and 13. In addition, about the part which overlaps with the above description of the pipeline rehabilitation method, the description is omitted or simplified. The filler 104 may be injected by the injection gun 80 from the filler injection hole 106 formed in the rehabilitating pipe 102 as described above, or a filler injecting hose (not shown) introduced from the pipe end of the rehabilitating pipe 102. No.) may be used for injection.

As shown in FIG. 12(A), when rehabilitating the existing pipe 100, first, the spacer 110 is installed on the top of the inner surface of the existing pipe 100, and then the rehabilitating pipe 102 is laid along the inner surface of the existing pipe 100. To do. After that, an air vent hole 108 is bored using a boring machine at the top of the rehabilitating pipe 102 in the mountain portion of the existing pipe 100.

After forming the air vent hole 108 in the rehabilitation pipe 102, the receiving frame member 12 of the obturator 10 is then fixed to the air vent hole 108, as shown in FIG. Then, the air vent pipe 90 is inserted and installed in the first tubular portion 20 of the receiving frame member 12 fixed to the filler injection hole 106. At this time, since the first seal ring 26 is provided in the first tubular portion 20, the first seal ring 26 is compressed between the first tubular portion 20 and the air bleeding tube 90, and the space between them is surely secured. Is stopped by. That is, by using the receiving frame member 12 of the obturator 10, the air vent pipe 90 can be easily installed in the filling material injection hole 106 in a state of having waterproofness. Further, if the outer diameter of the air bleeding tube 90 and the outer diameter of the tip portion 82 of the injection gun 80 are set to be the same or substantially the same, the first tubular portion 20 of the receiving frame member 12 will be It can also be used as a receiving portion for the air vent tube 90. That is, the obturator 10 of the same standard can be used for the filler injection hole 106 and the air vent hole 108 without separately manufacturing the obturator 10 for the filler injection hole 106 or the air vent hole 108.

When the receiving frame member 12 and the air vent pipe 90 are attached to the air vent hole 108, subsequently, as shown in FIG. 12C, the filler 104 is injected between the inner surface of the existing pipe 100 and the outer surface of the rehabilitation pipe 102. Then, it waits until the filling material 104 hardens.

When the filling material 104 is hardened, the air bleeder tube 90 is pulled out from the first tubular portion 20 as shown in FIG. 13(D), and then the air bleeder tube 90 is pulled out as shown in FIG. 13(E). A putty 120 such as an epoxy caulking material is embedded in the formed void 118.

Then, before the putty 120 is cured, the lid member 14 is screwed into the receiving frame member 12 as shown in FIG. 13(F). That is, the lid member 14 is attached to the receiving frame member 12 by inserting the second tubular portion 32 of the lid member 14 into the first tubular portion 20 of the receiving frame member 12 and screwing the female screw 24 and the male screw 36 together. As described above, by using the obturator 10, the air vent hole 108 can be easily closed after the filler 104 is injected.

As described above, according to this embodiment, the tip portion 82 of the injection gun 80 or the air bleeder tube 90 is inserted into the holes 106 and 108 formed in the rehabilitation tube 102 while the leakage of the filler 104 is appropriately prevented. Can be easily inserted or installed. That is, the holes 106 and 108 formed in the rehabilitating pipe 102 can be easily closed, and the workability at the time of injecting the filler 104 between the inner surface of the existing pipe 100 and the outer surface of the rehabilitating pipe 102 can be improved.

In the embodiment described above, the screw-type fitting means (female screw 24 and male screw 36) is adopted as the first and second fitting portions formed on the receiving frame member 12 and the lid member 14, but Not limited. For example, bayonet-type fitting means may be adopted as the first and second fitting portions.

Further, in the above-described embodiment, as an example of the rehabilitating pipe 102, a strip-shaped strip 50 is spirally wound to produce a pipe, but the present invention is not limited to this. The obturator 10 can be applied to various rehabilitating pipes as long as it is a rehabilitating pipe integrated with an existing pipe by using a filler.

It should be noted that the specific numerical values such as the dimensions mentioned above are merely examples, and can be appropriately changed according to the needs of the product specifications.

DESCRIPTION OF SYMBOLS 10... Obturator 12... Receiving frame member 14... Lid member 20... 1st cylinder part 22... Collar part 24... Female screw (1st fitting part)
26... 1st seal ring 32... 2nd cylinder part 34... Sealing part 36... Male screw (2nd fitting part)
38...Second seal ring 50...Strip 60...Joiner 80...Injection gun 90...Air vent pipe 100...Existing pipe 102...Rehabilitation pipe 104...Filling material 106...Filling material injection hole 108...Air venting hole

Claims (6)

An obturator for closing a filler injection hole or an air vent hole formed in a rehabilitating pipe integrated with an existing pipe using a filler ,
A receiving frame member fixed to the filling material injection hole or the air vent hole formed in the rehabilitation pipe , and a lid member attached to the receiving frame member,
The receiving frame member,
A first end that is formed in a cylindrical shape with both ends open and that is inserted into the filler injection hole or the air vent hole formed in the rehabilitation pipe and that receives the tip of the filler injection gun or the air vent pipe Tubular part,
A collar portion that is integrally formed with the outer peripheral surface of the one end portion of the first tubular portion, and has a surface on the other end portion side that is in contact with the inner surface of the rehabilitation pipe,
A first fitting portion formed on the inner circumferential surface of the first tubular portion, and a first fitting portion provided on the inner circumferential surface of the first tubular portion at a position closer to the other end than the first fitting portion. Equipped with a seal ring,
The lid member is
A cylindrical second tubular portion inserted into the first tubular portion,
A closure that includes a sealing portion that seals one end of the second tubular portion, and a second fitting portion that is formed on an outer peripheral surface of the second tubular portion and that is fitted with the first fitting portion. Ingredient The outer diameter of the tip portion of the injection gun and the outer diameter of the air bleeding tube are the same or substantially the same,
The obturator according to claim 1, wherein the first tubular portion can also serve as a tip portion of the injection gun and a receiving portion of the air bleeding tube. The surface of the flange portion on the side of one end is formed in a flat shape and abuts on a flange portion formed at the tip of the injection gun ,
The obturator according to claim 1 or 2 , wherein a surface on the other end side of the flange portion is bonded to an inner surface of the rehabilitation pipe . The obturator according to any one of claims 1 to 3, further comprising a second seal ring provided on an outer peripheral surface of the second tubular portion at a position closer to one end than the second fitting portion. A pipeline rehabilitation method using the obturator according to claim 1,
(A) Step of laying a rehabilitation pipe in the existing pipe,
(B) After step (a), a filler injection hole is formed in the rehabilitation pipe, the first tube portion of the frame member of the obturator is inserted into the filler hole, and the flange of the frame member is inserted. A step of adhesively bonding and fixing the surface on the other end side of the portion and the inner surface of the rehabilitation pipe with an adhesive ,
(C) After the step (b), the tip of the filling material injection gun is inserted into the first tubular portion, and the filling material is injected between the inner surface of the existing pipe and the outer surface of the rehabilitation pipe. And (d) after the step (c), removing the injection gun from the first tube portion and attaching the lid member of the obturator to the receiving frame member. A pipeline rehabilitation method using the obturator according to claim 1,
(A) Step of laying a rehabilitation pipe in the existing pipe,
(B) After the step (a), an air vent hole is formed at the top of the rehabilitation pipe, the first tube portion of the receiving frame member of the obturator is inserted into the air vent hole, and the flange of the receiving frame member is inserted. A step of adhesively bonding and fixing the surface on the other end side of the portion and the inner surface of the rehabilitation pipe with an adhesive ,
(C) a step of inserting and attaching an air bleeding tube into the first tubular portion after the step (b),
(D) after step (c), injecting a filler between the inner surface of the existing pipe and the outer surface of the rehabilitating pipe, and (e) after the step (d), the first tubular portion. A method of rehabilitating a conduit, comprising the step of removing the air bleeding tube from the tub and attaching the lid member of the obturator to the receiving frame member.

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