JP6200672B2 - Existing pipe rehabilitation system and existing pipe rehabilitation method - Google Patents

Description

  The present invention relates to an existing pipe rehabilitation system and an existing pipe rehabilitation method, and more particularly to an existing pipe rehabilitation system which is suitable for restoring and rehabilitating a strain-deformed portion of an existing pipe made of a thermoplastic resin such as vinyl chloride. About.

  In general, for pipes buried in the ground such as sewer pipes, it is inevitable that various deformations due to the passage of years since installation, for example, generation of steps due to displacement or change in diameter due to distortion deformation, etc. will occur.

  In particular, an existing pipe made of a thermoplastic resin such as vinyl chloride is locally distorted and deformed due to factors such as the earth pressure acting for a long time, and the cross section of the pipe becomes substantially elliptical. Such strain deformation causes a decrease in the flow ability of the pipe, and if left untreated, it may cause damage to the pipe, and it is necessary to rehabilitate.

  As a conventional technique for rehabilitating the deformation of the cross section of such a pipe, for example, in an existing pipe extended between adjacent manholes, a cylindrical expansion rubber which is expanded by compressed air called a packer is used. There has been a method of introducing a device provided and restoring a deformed portion of an existing pipe by pressing with a force of compressed air supplied to the expanded rubber.

  Patent Document 1 proposes to use a push-back device (by the present inventors) for pushing back the distortion deformation in the existing pipe and restoring the shape of the existing pipe. If the said apparatus is used, since the above-mentioned local distortion deformation | transformation part is pushed back with a pushing-back apparatus and the shape of the existing pipe | tube is restored to the original circle | round | yen, it can apply a reinforcing material, so it is good to prevent distortion deformation again Rehabilitation can be performed.

JP 2006-257722 A

  However, in the above prior art, since the distortion deformed portion is pushed back only by the pressing force by the compressed air, the restoring ability is insufficient, and it is difficult to restore the pipe line to a complete circle. In addition, coupled with the fact that the deformed portion is attached to the restored portion, there is a problem that the strain deformation recurs before applying the reinforcing material. Furthermore, in the apparatus described in Patent Document 1, since a pushing back device is used, the restoring ability by pressing is ensured, but the problem that distortion deformation recurs before applying the reinforcing material is not solved.

  The present invention has been made to solve these problems, and an object of the present invention is to provide an existing pipe rehabilitation system and an existing pipe rehabilitation method capable of suitably executing rehabilitation of an existing pipe in which distortion deformation has occurred. is there.

In order to achieve the above object, the invention according to claim 1 is a pipeline rehabilitation system for rehabilitating existing pipelines such as sewer pipes.
A pipe line restoring mechanism for restoring a strain deformation part generated in an existing pipe;
A reinforcing material applying device that is disposed behind the pipe restoring mechanism in the traveling direction and applies a reinforcing material to the inner peripheral surface of the portion restored by the pipe restoring mechanism;
Moving means for moving the pipe line restoring mechanism and the reinforcing material application device so that the reinforcing material application device is positioned in the restored existing pipe portion;
The reinforcing material application device is:
A reinforcing material attached body to which the reinforcing material is attached;
Reinforcing material diameter increasing means for expanding the diameter of the reinforcing material so that the attached reinforcing material is applied to the inner peripheral surface of the restored part;
Reinforcing material curing means for curing the expanded reinforcing material;
It is characterized by having.

  According to the present invention, first, the pipeline restoring mechanism is moved to the local strain deformed portion of the existing pipe by the moving means, the strain deformed portion of the existing pipe is restored by the pipeline restoring mechanism, and the series following the restoration is performed. As the step, the reinforcing material applying device is moved forward by the moving means so that the reinforcing material applying device provided behind the pipe line restoring mechanism is located at the deformed portion. Furthermore, after that, the diameter of the reinforcing material is expanded by the reinforcing material diameter expanding means of the reinforcing material applying apparatus, and the reinforcing material is cured by the curing means in the expanded diameter state. As a result, as a series of steps after the local strain deformation part is restored by the above-mentioned pipeline restoration mechanism, the restoration part of the existing pipe is quickly reinforced by applying the reinforcing material to the part and hardening it. Therefore, it is possible to reliably prevent the restored portion from being deformed and deformed again due to factors such as earth pressure before applying the reinforcing material after restoration, thereby contributing to the rehabilitation of a suitable existing pipe.

  Further, in the present invention, the existing pipe is formed of a thermoplastic resin, and the pipe restoring mechanism has pressing means for pressing back the strain deforming part, and the strain deforming part by the pipe restoring mechanism. It is preferable to further include a heating unit that heats the strain-deformed portion before restoration, and a cooling unit that cools the pushed-back portion after the strain-deformed portion is pushed back by the pipe line restoring mechanism.

  According to this, the distortion deformation part of the existing pipe line formed with the thermoplastic resin can be heated, and the distortion deformation part can be pushed back by the pressing means in a state where the distortion deformation part is softened. . Accordingly, the pressing for restoring the distortion deformed portion becomes easy. Further, after the restoration is completed, the heating by the heating means is finished, and the restored portion is gradually cooled and hardened. That is, the restored portion is cured in the shape pushed back by the pressing means, and the shape is firmly held. Therefore, even after the push-back state by the pressing means is released, the restored portion will exhibit sufficient durability against the force that prompts deformation again due to earth pressure or the like, so the push-back state is released. The re-deformation of the restored portion can be prevented more reliably after the reinforcement is applied.

  On the other hand, in the restored portion after pressing, the shape holding state of the restored portion can be realized more quickly by performing cooling using the cooling means. Specifically, when the restoration by the above-described pushback is performed, the restoration portion is cooled by the cooling means, so that the shape of the restoration portion can be held more quickly, so that the pushback state can be released. Time (time until the restored portion obtains sufficient durability) can be greatly shortened, and as a result, it contributes to the reduction of the entire rehabilitation process.

Furthermore, in the present invention,
The pressing means has a pressing plate that comes into contact with the strain deformation portion,
In the pressing plate,
As the heating means, a heating medium supply pipe for supplying a heated heating medium to the inner peripheral surface of the strain deformation portion,
As the cooling means, a cooling medium supply pipe for supplying a cooled medium to the pushed-back portion is penetrated.

  According to this, a distortion deformation part can be uniformly pressed in the range of the area of this press board by performing the said pushing back using a press board. And since the heating medium pipe | tube and cooling medium supply pipe | tube for supplying a heating medium and a cooling medium to this press plate were penetrated, with respect to the distortion deformation part which is a heating object, and the decompression | restoration part which is a cooling object Heating and cooling can be reliably and efficiently performed. In particular, when heating the strain deformed portion, it is possible to reliably prevent the heating unnecessary portion other than the deformed portion in the existing pipe from being heated and softened.

  Furthermore, it is preferable that the reinforcing material is formed of a photocurable resin, and the reinforcing material curing means has a light emitting body that emits light having a wavelength for curing the photocurable resin.

  In general, it is known that a photocurable resin has a very short reaction time required from the start of curing to the end of curing as compared with a thermosetting resin. On the other hand, in the present invention, the reinforcing material is applied to the restored portion as described above, and then it is necessary to cure the reinforcing material. However, since the curing reaction of the reinforcing material is generally an exothermic reaction, As a result, heat may be transmitted not only to the reinforcing material but also to the restored portion, and the temperature may increase. When heat is transferred to the restored portion in this way, the restored portion of the existing pipe made of thermoplastic resin is softened and may be deformed again due to factors such as earth pressure. Therefore, after the restoration of the strain-deformed portion of the existing pipe is completed, the hardening reaction of the reinforcing material should be immediately terminated before the heat generated by the hardening reaction of the reinforcing material is transferred to the existing pipe. In such a situation, in the present invention, by forming the reinforcing material with a photocurable resin, the curing reaction can be quickly terminated before the restored portion is softened by heat transfer. Even during the curing process, distortion of the restored portion is reliably prevented, and as a result, the efficiency of the pipe rehabilitation work can be dramatically increased.

  Moreover, it is preferable that the said reinforcing material application apparatus is connected with the back of the said pipe | tube restoring mechanism. Thereby, for example, after the restoration of the strain deformed portion by the pipe restoring mechanism is completed, it is possible to quickly shift to the application of the reinforcing material to the restored portion by the reinforcing material applying device. In addition, since the reinforcing material application apparatus connected to the rear can be moved together with the movement of the pipe after the restoration by the pipe restoring mechanism is completed, the configuration of the moving means is simplified. The

Furthermore, the present invention is a pipeline rehabilitation method performed using the above pipeline rehabilitation system,
A pipe restoring mechanism alignment step for moving the pipe retreading system so that the pipe restoring mechanism is located at a strain deformation portion of the existing pipe;
After the pipeline restoration mechanism alignment step, a restoration step of restoring the strain deformation part in the existing pipe by the pipeline restoration mechanism;
After the restoration step, the reinforcing material application device alignment step of moving the pipe rehabilitation system so that the reinforcing material application device reaches the position of the pressed portion of the existing pipe,
After the reinforcing material application device alignment step, a reinforcing material diameter increasing step for expanding the diameter of the reinforcing material,
After the diameter expansion step, a reinforcing material curing step of curing the reinforcing material by the reinforcing material curing means,
It is characterized by having.

  Thus, by performing each process using the above-mentioned pipeline rehabilitation system, as a series of processes after performing the above-mentioned restoration to the local distortion deformed part, a reinforcing material is applied to the restored part and cured. As a result, the restoration part of the existing pipe is reinforced quickly, so it is possible to reliably prevent the restoration part from being distorted again due to factors such as earth pressure before applying the reinforcing material after restoration. It will contribute to the rehabilitation of existing pipes.

  According to the present invention, as a series of steps after the above-described restoration is performed on the local strain deformation part, the restoration part of the existing pipe is quickly reinforced by applying the reinforcing material to the restoration part and curing it. Therefore, it is possible to reliably prevent the restored portion from being deformed again due to factors such as earth pressure before applying the reinforcing material after restoration, thereby contributing to the rehabilitation of a suitable existing pipe. Thereby, the existing pipe rehabilitated by the pipe rehabilitation system and the pipe rehabilitation method according to the present invention will almost certainly return its normal cross-sectional shape, and the strength will be kept higher than a certain level, As a result, the function as the conduit is surely restored to a normal state.

The state which introduced the pipeline rehabilitation system which concerns on embodiment of this invention in the existing pipe (sewer main) is shown. It is a figure explaining the composition of a pipeline rehabilitation system. It is a figure explaining the diameter expansion operation | movement of the cylinder in a packer sleeve. 3 is a flowchart according to the present invention. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment. It is a figure explaining the rehabilitation process using the pipe line rehabilitation system concerning this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, a case where partial rehabilitation of a sewage main pipe between manholes, in particular, a PVC pipe which is a thermoplastic resin pipe will be described. FIG. 1 shows a state where a pipeline rehabilitation system according to an embodiment of the present invention is introduced into an existing pipe, and FIG. 2 shows an enlarged configuration of the pipeline rehabilitation system.

  In the present embodiment, as shown in the figure, a main pipe 100 that is an existing pipe to be rehabilitated is formed between shafts 200 and 300 called so-called manholes. The main pipe 100 is configured as one pipe extending between the vertical piles 200 and 300 by connecting a plurality of single pipes, and distortion deformation 100a occurs in one of the single pipes. For example, the strain deformation portion 100a is caused by a combination of earth pressure and aging deterioration of a single pipe. In the present embodiment, the pipeline rehabilitation system 10 is used for partial rehabilitation of the strain deformation portion 100a. Hereinafter, the configuration of the pipe line rehabilitation system 10 will be described.

  The pipeline rehabilitation system 10 advances in 200 directions from the manhole 300, and this pipeline rehabilitation system 10 is pulled toward the manhole 200 by a pulling mechanism as a moving mechanism. As shown in the figure, the traction mechanism is composed of a traction drive device 72 installed on the ground that winds and pulls the wire 70 coupled to the conduit rehabilitation system 10. The pipeline rehabilitation system 10 is configured to be towed by a wire 70 and a tow driving device 72, and is configured to be disposed at a target position. Note that the moving mechanism is not limited to such a traction mechanism, and the pipeline rehabilitation system 10 may be configured to have a self-propelled function directly.

  The pipeline rehabilitation system 10 includes a push-back device 12 as a pipeline restoration mechanism that actually restores the existing pipeline 100, and the push-back device 12 via a string-like connector 13 in the rearward direction (right side in the figure). And a packer sleeve 14 as a combined reinforcing material application device. In the present embodiment, the packer sleeve 14 is connected to the rear of the push-back device 12 in this way, so that the push-back device 12 and the packer sleeve 14 are brought together by traction by the wire 70 and the traction drive device 72. It can be moved easily.

  The push-back device 12 has a configuration including an upper pressing plate 20 and a bottom pressing plate 22 that press the inner peripheral surface of the pipe line. The upper pressing plate 20 and the bottom pressing plate 22 are configured such that the distance between the upper pressing plate 20 and the bottom pressing plate 22 expands and contracts in a direction orthogonal to the pipe axis direction of the pipe line rehabilitation system 10. The surface shape is formed in an outwardly convex arc shape, and is preferably formed in an arc shape having a curvature close to the curvature of the inner peripheral surface of a normal existing duct 100 that is not deformed. The bottom pressing plate 22 has a shape similar to that of the upper pressing plate 20, but the outer surface of the upper pressing plate 20 is more stable than the upper pressing plate 20 in order to stabilize the installation state of the push-back device 12 during the pressing operation of the existing pipe inner wall. The area is formed large. Thus, when the deformed portion is pushed back by the upper pressing plate 20, tilting and wobbling of the entire apparatus are effectively prevented. The expansion / contraction is performed by automatically expanding the interval between the upper pressing plate 20 and the bottom pressing plate 22 by an internal hydraulic mechanism (not shown) by the hydraulic piston 26 provided in the main body 12a of the push-back device 12, or This is done by contracting.

  Further, when the upper pressing plate 20 is expanded and pressed against the strain deformed portion 100a, that is, when the strain deformed portion 100a of the main pipe 100 is restored, the strain deformed portion can be restored smoothly. It is preferable to improve the plasticity of 100a. For this purpose, it is possible to provide a heating means for heating the strain deformation portion 100a. In the present embodiment, the heating means supplies various heating devices (not shown) that generate heated air, such as a gas heater, an electric heater, or a heat pump, and supplies the generated heated air to the surface of the strain deformation portion 100a. In order to do this, it consists of a heated air supply pipe 29 provided through the upper pressing plate 20.

  On the contrary, if the temperature of the portion restored by the push-back is high after the return of the strain-deformed portion 100a is finished, the strain deformation immediately recurs when the pressed state by the push-back device 12 is released. There is a fear. Therefore, it is preferable to provide a cooling means for cooling the restored portion in order to quickly bring the restored portion into a cured state.

  As the cooling means, various means that can be appropriately selected by those skilled in the art, such as air cooling or water cooling, can be adopted. For example, the heating air supply pipe 29 is also used as a cooling air supply pipe, and a predetermined cooling air generating means is used. Cooling air may be supplied from the supply pipe 29 to the restored portion of the existing pipe 100. In addition, a pipe for supplying cooling air may be provided separately from the heated air supply pipe 29. Furthermore, you may make it comprise the arbitrary cooling water supply mechanisms which make it possible to apply a cooling water to the said decompression | restoration part.

  Next, the configuration of the packer sleeve 14 will be described. 2 and the like, the packer sleeve 14 includes a metal front end plate 14a connected to the push-back device 12 via a connector 13, and movement of the device relative to the front end plate 14a. It has a metal rear end plate 14b positioned on the opposite side in the direction, and an elastic cylinder 40 is mounted so as to bridge between the front end plate 14a and the rear end plate 14b. Further, in the inside of the elastic cylinder 40, a substantially cylindrical bar-shaped LED lamp support 44 is provided along the substantially central axis of the existing tube 100.

  Further, the LED lamp support 44 is provided with a plurality of LED lamps 46 uniformly at regular intervals in the circumferential direction and the radial direction over the entire circumferential surface thereof. A reinforcing material 42 formed of a photocurable resin that is cured by light from the LED lamp 46 is wound around the elastic cylinder 40.

  One end portion of the elastic cylinder 40 is fixed to the edge portion of the front end plate 14a side surface of the front end plate 14a, and the other end portion is fixed to the edge portion of the rear end plate 14b side surface of the front end plate 14a. Yes.

  That is, the elastic cylinder 40 is attached in a state of covering all the LED lamp supports 44 and is restrained with the front end plate 14a and the rear end plate 14b as both ends.

  On the other hand, an air supply pipe 62 is provided in communication with the rear end plate 14b to which the elastic cylinder 40 is fixed at the rear, and the supply port 62a of the air supply pipe 62 is connected to the elastic cylinder 40. Located inside. That is, by supplying compressed air through the air supply pipe 62, compressed air is supplied into the elastic cylinder 40, and the elastic cylinder 40 expands. That is, in the present embodiment, the diameter expansion of the elastic cylinder 40 is performed by supplying compressed air to the inside of the elastic cylinder 40, so that the diameter expansion and contraction can be performed easily and quickly.

  Further, as shown in FIG. 2 and the like, the elastic cylindrical body 40 has a sufficient yield of the internal space with respect to the diameter of the LED lamp support body 44 when attached to the front end plate 14a and the rear end plate 14b. It is preferable to be configured to be larger. The reason why such a configuration is preferable is that a sufficiently large amount of compressed air is supplied into the elastic cylindrical body 40 to expand the elastic cylindrical body 40 to expand the diameter of a reinforcing material 42 to be described later. Is capable of being pressed against the inner peripheral surface (distortion deformed portion 100a) of the existing pipe 100 with a sufficient pressing force.

  As an example of the material of the elastic cylinder 40, a light transmissive rubber is used so that light from the inside of the reinforcing member 42 can be transmitted. In particular, the elastic cylinder 40 needs to be expanded to such an extent that the reinforcing member 42 is pressed against the inner surface of the existing pipe 100. The elastic cylinder 40 has the property of having flexibility and elasticity capable of withstanding sufficient expansion. It is necessary to prepare together with sex. As a material satisfying such conditions, for example, rubber obtained by vulcanizing EPDM (ethylene propylene diene monomer) excellent in heat resistance and weather resistance is suitable. Note that the material of the elastic cylinder 40 is not necessarily limited to rubber. That is, as long as it has elasticity for expanding the diameter of the reinforcing material 42 and light transmissivity that allows light to be transmitted by the LED lamp 46, instead of the rubber one, another resin material, metal material, inorganic material, or You may use these 2 or more types of mixed materials.

  The reinforcing member 42 has a property of receiving and curing the light transmitted through the elastic cylindrical body 40, and is formed of a material having a property of flexibility and elasticity capable of withstanding sufficient diameter expansion, like the elastic cylindrical body 40. Need to be done. In particular, in the present embodiment, the reinforcing material 42 is formed of a non-woven photocurable resin. As this material, it is comprised with the material made from FRP obtained, for example by overlaying an unsaturated polyester resin, a glass cloth, and a nonwoven fabric alternately. A material obtained by reinforcing epoxy acrylate resin or vinyl ester resin with various reinforcing fibers may be used.

  In particular, it is preferable to add a photopolymerization initiator such as BDK (benzyldimethylmethanol) to this material. As the photopolymerization initiator, an ultraviolet polymerization initiator that accelerates the polymerization of the resin by ultraviolet rays can be used, but it is desirable to use a photopolymerization initiator that can promote the polymerization of the resin by the action of both ultraviolet rays and visible rays.

  On the other hand, the LED lamp 46 provided on the peripheral surface of the LED lamp support 44 is used as a light source that emits light for curing the reinforcing material 42 that is a photocurable resin. It receives power from the power cable 60 connected via the end 14b and emits light of a predetermined wavelength. The wavelength of the light emitted by the LED lamp 46 can be adjusted as appropriate depending on the type of photocurable resin or photopolymerization initiator constituting the reinforcing material 42, a desired curing time, and the like. A light having a wavelength in the region, a light having a wavelength in the visible light region, a light having a wavelength in the ultraviolet region, or a composite light of these can be used. Here, the LED lamps 46 that irradiate the reinforcing material 42 formed of a photo-curing resin are evenly provided on the entire circumference of the LED lamp support 44 inside the elastic cylinder 40. Then, the entire periphery is cured uniformly and efficiently, and the entire rehabilitation process can be performed more efficiently. The power supply of the LED lamp 46 may be secured by providing a battery or the like inside the LED lamp support 44 instead of or together with the power supply by the power cable 60.

  Further, the front end plate 14a and the rear end plate 14b are respectively provided with running bodies 49 for supporting the packer sleeve 14 at the center axis position of the existing pipe 100 and moving the packer sleeve 14 as the push-back device 12 is pulled. Is provided. The traveling body 49 has traveling wheels 51 that are in contact with the inner peripheral surface of the existing pipe 100, and the traveling wheels 51 extend radially in the front end portion and the rear end portion of the traveling body 49 and extend inside the existing pipe 100. It is provided at the tip of a telescopic support rod-like body 53 that is configured to be stretchable according to a level difference such as unevenness on the surface (see FIG. 2). Thus, the packer sleeve 14 can smoothly travel in the existing pipe 100 as the push-back device 12 is moved by the pulling means.

  3A and 3B are diagrams for explaining the operation of the packer sleeve 14 according to the present embodiment. FIG. 3A is a partial cross-sectional view showing a reduced diameter state of the elastic cylindrical body 40 in the packer sleeve 14, and FIG. FIG. 4 is a partial cross-sectional view showing an expanded state of the elastic cylinder 40 in the packer sleeve 14. For reference, the cross section of the existing pipe 100 is indicated by a broken line. The packer sleeve 14 is applied to the restored portion after the distortion deformed portion 100a generated in the existing pipe 100 is restored by the push-back device 12.

  As shown in the figure, regarding the relationship between the elastic cylindrical body 40 of the packer sleeve, the reinforcing member 42, and the inner diameter D of the existing pipe 100, the outer diameter of the elastic cylindrical member 40 is d1, the outer diameter of the reinforcing member 42 is d2, and If the inner diameter of the tube 100 is D, d1 <d2 <D is established. Further, when the diameter of the elastic cylinder 40 is increased, the outer diameter d1 of the elastic cylinder 40 is set so that the reinforcing member 42 can press the rehabilitation target portion of the existing pipe 100 as shown in FIG. Need to be adjusted. The cross-sectional shape of the elastic cylinder 40 is shown as a substantially circular shape in the figure, but is not limited to this, and may be an arch-shaped, polygonal, elliptical, or egg-shaped cross-sectional shape. Good.

  Hereinafter, the flow of pipe rehabilitation using the pipe rehabilitation system 10 having the above configuration will be described. FIG. 4 is a flowchart for explaining the pipeline rehabilitation process, and FIGS. 5 to 10 are explanatory diagrams for explaining the movement of the pipeline rehabilitation system 10 according to the pipeline rehabilitation process.

  First, in performing the rehabilitation, as a preparation for preventing water from flowing into the work site, a dam member 101 is installed on the upstream side of the manhole 200 to block the upstream side of the main pipe 100 (see FIG. 1). . At this time, the pipe line rehabilitation system 10 is introduced from the entrance of the main pipe 100 and is arranged in the vicinity of the strain deformation portion 100a.

  And in step S101, as shown to Fig.5 (a) and FIG.5 (b), this pipe line so that the upper press board 20 in the pushing-back apparatus 12 of the pipe line renovation system 10 may oppose the distortion deformation | transformation part 100a. The entire rehabilitation system 10 is pulled by the pulling mechanisms 70 and 72 (pipe line restoring mechanism positioning step).

  Next, in step S102, after the alignment, a push-back process (restoration process) is performed. Specifically, as shown in FIG. 6A, first, the push-back device 12 is brought into contact with the strain deformation portion 100 a by raising the upper pressing plate 20 by the expansion / contraction mechanism of the push-back device 12. Is supported by the upper and lower pressing plates 20 and 22 at the upper and lower portions. Although not shown, in the case where the positions of the upper pressing plate 20 and the strain deformation portion 100a in the circumferential direction of the main pipe 100 are shifted, for example, the upper pressing plate is used by using a predetermined rotating mechanism (not shown). The alignment may be performed by rotating 20 by a desired angle along the radial direction.

  Then, as shown in FIG. 6B, an operation is performed to push back the strain deformation portion 100a by applying a force in the direction of further raising the upper pressing plate 20 and lowering the bottom pressing plate 22. Thereby, the distortion deformed portion 100a is restored to the original normal shape. Hereinafter, the “distortion deformed portion 100a” is referred to as “distortion deformed portion 100a” when the state before the restoration by the push-back device 12 is performed, and the state after the restoration by the push-back device 12 is performed. In the case of showing, this is described as “restoration portion 100a”.

  Here, in the present embodiment, the main pipe 100 is made of polyvinyl chloride, which is a thermoplastic resin. Therefore, in the push-back operation, the efficiency and simplification of the operation can be achieved by bringing such a thermoplastic resin into a heated state. In particular, in the present embodiment, heated air generated using a heating device (not shown) is supplied to the surface of the strain deformed portion 100a by the heated air supply pipe 29. As a result, at the time of pushing back, the strain deformed portion 100a of the main pipe 100, which is a thermoplastic PVC tube, is softened, so that the strain deformed portion 100a is easily restored. In addition, the heating performed in the present embodiment is performed so that, for example, the strain deformation portion 100a is about 57 ° C. to 80 ° C., which is known as the heat deformation temperature of a so-called PVC pipe.

  In addition, you may start the heating of the distortion deformation | transformation part 100a by the said heating air before performing the push-back operation | movement by the raise of the upper press board 20. FIG. However, if the portion is heated in a state where the strain deformed portion 100a is not supported at all, strain deformation may increase due to factors such as earth pressure accompanying the softening of the strain deformed portion 100a. It is preferable to start heating in a state where the upper pressing plate 20 in step S102 is in contact with the strain deformation portion 100a, that is, in a state where the strain deformation portion 100a is supported with a certain amount of force.

  Further, after the strain deformed portion 100a is restored by the upper pressing plate 20, heating by the heating device is stopped, and the portion is cooled by a cooling means (not shown). Thereby, the restored portion is quickly cured and the restored shape is firmly held. Here, as the cooling means, various means that can be conceived by those skilled in the art as described above can be adopted. In particular, the cooling air can be applied to the strain deformation portion 100a, that is, the cooling air supply. It is preferable to employ an apparatus. In addition, since the cooling means is not an essential configuration, the action according to the present invention can be obtained without providing the cooling means. However, in this case, after the heating by the heating device is stopped, it takes time until the restored portion cools and hardens, and after waiting until the shape of the restored portion becomes a holding state, the next step is performed. It is preferable to move.

  Next, in step S103, as shown in FIG. 7, a contraction operation is performed to lower the upper pressing plate 20 of the push-back device 12 and raise the bottom pressing plate 22 (pressing state releasing step). In this state, earth pressure is generated in the restored portion 100a in a state where there is no support by the upper pressing plate 20, so that if left unattended, distortion deformation occurs again.

  However, in this embodiment, since the restored portion 100a is cooled after the restoration is completed in step S102, the portion is cured and is in a shape-retained state, so that the pressure on the restored portion 100a is pressed. Even if the state is released and earth pressure is generated in the restored portion 100a, coupled with the fact that the deformation due to the earth pressure itself is delayed, the distortion deformation of the restored portion 100a before the reinforcement is surely reoccurred. Is prevented.

  In step S104, after the pressing state releasing step, as shown in FIG. 8, the entire pipeline rehabilitation system 10 is moved by the wire 70 and the traction drive device 72 so that the packer sleeve 14 reaches the position of the restoring portion 100a. Move it forward (left side of the figure). In FIG. 8, the state before restoration of the restoration part 100a is indicated by a two-dot chain line. That is, in order to reinforce the restoration portion 100a with the reinforcing material 42 of the packer sleeve 14, alignment is performed (reinforcing material application device alignment process).

  In step S105, after the reinforcing material applying apparatus positioning step, the diameter of the reinforcing material 42 of the packer sleeve 14 is expanded (reinforcing material diameter increasing step) as shown in FIG. The diameter expansion is performed by supplying compressed air to the space in the elastic cylindrical body 40 via the compressed air supply pipe 29. The supply pressure and the supply time of the compressed air are suitably set appropriately according to various conditions such as the material of the elastic cylinder 40 and the reinforcing material 42 and the volume of the space inside the elastic cylinder 40.

  As can be understood with reference to FIG. 9 (a), the elastic cylinder 40 is expanded by the supply of compressed air, so that the main pipe is sandwiched between the reinforcing members 42 wound around the elastic cylinder 40. 100 restoration parts 100a are pushed outward. In particular, this expanding operation is performed while maintaining a uniform surface contact state in the circumferential direction and the radial direction via the reinforcing member 42 between the elastic cylindrical body 40 and the restoring portion 100a. Therefore, a uniform force can be applied to the restoring portion 100a in the circumferential direction and the radial direction via the reinforcing member 42, and the reinforcing member 42 and the restoring portion 100a can cause breakage of the reinforcing member 42 due to stress concentration. Non-uniform contact between them is prevented.

  In step S106, the expanded reinforcing material 42 is cured after the repair material expanding process (reinforcing material curing process). Specifically, the LED lamp 46 held by the light emitter holder 44 inside the elastic cylinder 40 is caused to emit light, and the reinforcing material 42 is irradiated through the elastic cylinder 40, thereby forming the photocurable resin. The formed reinforcing material 42 is cured.

  Here, it is generally known that a photocurable resin has a very short reaction time from the start of curing to the end of curing as compared with a thermosetting resin. On the other hand, in the present embodiment, the reinforcing material 42 is applied to the restored portion 100a as described above, and then the reinforcing material 42 needs to be cured. However, the curing reaction of the reinforcing material 42 is generally an exothermic reaction. Therefore, if the temperature of the restored portion 100a of the existing pipe made of thermoplastic resin increases due to this heat generation, the restored portion 100a may be softened and deformed again. Therefore, after the restoration portion 100a has been pushed back, the curing reaction of the reinforcing material 42 should be terminated promptly before the heat due to the curing reaction of the reinforcing material is transferred to the existing pipe. For such a situation, by forming the reinforcing material 42 with a photocurable resin as in the present embodiment, the curing reaction can be quickly terminated before the restored portion 100a of the existing pipe 100 is softened. Thus, the reinforcing action for the restored portion 100a can be reliably exhibited.

  Next, in step S107, as shown in FIG. 9B, the compressed air inside the elastic cylinder 40 is removed, and the expanded diameter state of the elastic cylinder 40 is released (cylinder diameter expansion releasing step). As a result, the elastic cylinder 40 contracts while only the reinforcing material 42 is in close contact with the restoring portion 100a of the existing pipe 100, and the pressing state to the restoring portion 100a via the reinforcing material 42 is released.

  And in step S108, as shown in FIG. 10, the pipe line renovation system 10 is collect | recovered after the said cylindrical body diameter expansion cancellation process. That is, since the reinforcing material 42 has already been applied to the existing pipe 100, the pipe pushing back device 12 is pulled by the wire 70 and the traction driving device 72, and the pipe pushing back device 12 and the connector 13 are connected thereto. The integrated packer sleeve 14 is moved forward, and the pipe rehabilitation system 10 is recovered at a predetermined recovery place. At this time, the traveling wheels 51 of the traveling body 49 travel on the inner peripheral surface of the reinforcing member 42. Accordingly, the telescopic rod-like body 53 is appropriately contracted and expanded during the traveling so that the traveling wheel 51 can get over the stepped portion between the inner peripheral surface of the existing pipe 100 formed by the thickness of the reinforcing member 42. .

  As described above, according to the existing pipe rehabilitation system 10 according to the present embodiment, the strain deformation portion 100a is restored to the local strain deformation portion 100a by the duct pushing back device 12, and then the strain deformation portion 100a is restored. As a series of steps following the restoration of the portion 100a, the packer sleeve 14 provided behind the pipe pushing back device 12 applies the reinforcing material 42 to the inner surface of the restoration portion 100a. Therefore, the restoration portion 100a is reinforced by the reinforcing material 42 immediately as a series of steps following the restoration of the strain deformation portion 100a by the pipe pushing back device 12, and therefore, before the reinforcement material 42 is applied after the restoration. In the meantime, it is possible to reliably prevent the restored portion 100a from being deformed and deformed again due to factors such as earth pressure, and as a result, it contributes to the rehabilitation of a suitable existing pipe 100.

  Further, in the present embodiment, the pipe pushing back device 12 has the upper pressing plate 20 and the lower pressing plate 22 that press the strain deforming portion 100a when the strain deforming portion 100a is pushed back, and particularly the upper pressing plate. 20 includes a heating medium supply pipe 29 that supplies a heating medium heated by a heating device (not shown) to the inner peripheral surface of the strain deformation portion 100a, and a cooling medium supply pipe that supplies cooling air to the restoration portion 100a. In the state where the existing pipe line 100 which is a PVC pipe is heated by the heating medium and the existing pipe line is softened, the pressing back of the strain deformation portion 100a by pressing the pressing plates 20 and 22 is pushed back. It is carried out. Therefore, restoration by pressing the strain deformed portion 100a can be performed very easily and efficiently.

  Then, after the restoration is finished, the heating is finished and the restored part 100a is gradually cooled and hardened. That is, the shape of the restored portion 100a is firmly held. Accordingly, even after the push-back state by the push-back device 12 is released, the shape of the restored portion 100a remains firmly maintained, so that the reinforcement 42 is applied after the push-back state is released. It is possible to surely prevent the portion 100a from being deformed again in the meantime, and to maintain the above shape quickly by cooling, so that the push-back state by the pressing plates 20, 22 can be released. Time (time until the restoration part 100a obtains sufficient durability) can be significantly shortened, which contributes to reduction of the entire rehabilitation process.

  And the heating medium pipe | tube 29 and cooling air pipe | tube for supplying a heating medium and a cooling medium to this press plate 20 are penetrated, and the distortion deformation | transformation part 100a which is a heating object, and the decompression | restoration part 100a which is a cooling object. In addition, a heating medium and a cooling medium can be supplied to the pinpoint, and reliable and efficient heating and cooling can be realized. In particular, when heating the strain deformed portion 100a, it is possible to reliably prevent the heating unnecessary portions of the existing pipe 100 other than the deformed portion 100a from being heated and softened.

  Furthermore, in the present embodiment, it is extremely preferable that the reinforcing material 42 is formed of a photocurable resin and is cured by the LED lamp 46. Thereby, before the heat generated by the photocuring reaction reaches the restored portion 100a of the existing pipe 100 or before reaching the temperature rise enough to deform it, the curing reaction of the reinforcing material 42 is performed. Can be terminated. Therefore, even in the hardening process of the reinforcing material 42, the re-distortion of the restored portion 100a is reliably prevented, and as a result, the efficiency of the pipe rehabilitation work can be dramatically increased.

  It should be noted that instead of LEDs as the light source for curing the reinforcing material 42, other types of light emission such as mercury lamps, gallium lamps, halogen lamps, metal halide lamps and the like according to various working environment conditions such as work place and work space. A source may be used. On the other hand, since it is known that the amount of heat generated when the LED lamp emits light is smaller than that of other light sources, heat is transmitted to the restoration portion 100a of the existing tube 100 as in the present embodiment. It is most preferable to use an LED lamp when it is desired to avoid as much as possible.

  In addition, this invention is not limited to the said embodiment, A various change is possible within the range of the summary of invention. For example, in the present embodiment, the push-back device 12 having the pressure plates 20 and 22 that expand and contract in order to restore the strain deformed portion 100a is used, but the mechanism for performing the restoration is limited to this. Instead of the push-back device 12, for example, a device that performs restoration using compressed air may be used.

  In the present embodiment, the reinforcing material 42 is a photo-curable resin and the elastic cylinder 40 is a light-transmitting rubber. However, the present invention is not limited to this. Other materials may be used as long as they exhibit contractility and the reinforcing material 42 can be cured when expanded.

  On the other hand, for example, the reinforcing member 42 may be formed of a thermosetting resin while the elastic tubular body 40 is a predetermined heat transfer elastic member. In this case, in the reinforcing material curing step, by using a predetermined heater or the like instead of the LED lamp 46, heat can be applied to the reinforcing material 42 via the elastic cylindrical body 40 to be cured. In particular, in this case, a predetermined heat insulating material is wound around the outside of the reinforcing material 42 so that the heat accompanying the thermosetting of the reinforcing material 42 is not transmitted to the restoring portion 100a and is softened by raising the temperature of the portion. It is preferable to apply means. Furthermore, the present invention is not limited to the material of the existing pipe made of vinyl chloride, and can be applied to other various existing pipes formed of a thermosetting resin.

  Furthermore, the present invention can also be used when the existing pipe is a concrete pipe or a ceramic pipe other than the thermoplastic resin. In particular, in the case of concrete pipes and ceramic pipes, unlike PVC pipes, the elasticity is small, so when strain deformation occurs, it is often accompanied by breakage such as cracks, and in this state when pushing back deformation with a push back device There is a possibility that the destruction of the destruction part will progress further. Therefore, it is preferable to install a mechanism for injecting an instantaneously hardened material (for example, quick-hardening cement or water glass) from the surface of the upper pressing plate 20 of the push-back device 12 used when restoring strain deformation to the ground side. Thereby, since it can push back while repairing the said destruction part, the restoration by pushing back can be performed, preventing the progress of destruction of a destruction part. In this case, in particular, it is preferable to attach an elastic member, for example, rubber or urethane material, on the surface of the upper pressing plate 20 or the bottom pressing plate 22 of the push-back device 12 to enhance adhesion to the inner wall of the conduit.

  By attaching rubber or urethane material in this way, in the process of pushing back, the inner wall of the pipe line can be pressed more evenly to prevent stress concentration and to prevent the progress of destruction of the destruction part more reliably, There is also a secondary effect that it is possible to effectively prevent the injected hardened material from leaking into the tube.

10 Pipeline rehabilitation system 12 Push-back device (pipeline restoration mechanism)
14 Packer sleeve (reinforcing material application device)
15 Traction mechanism (moving means)
17 Compressed air supply means 20 Upper pressing plate 22 Lower pressing plate 40 Rubber cylinder 42 Reinforcing material 46 LED (light emitting body)
47 Bag (Reinforcement diameter expansion means)
60 Air pipe (reinforcement diameter expansion means)
80 Compressed air supply means 100 Main pipe (existing pipe)
100a Distortion deformation part, restoration part

Claims (4)

In a pipeline rehabilitation system that rehabilitates existing pipelines such as sewer pipes,
A pipe line restoring mechanism for restoring a strain deformation part generated in an existing pipe formed of a thermoplastic resin ;
A reinforcing material applying device that is disposed behind the pipe restoring mechanism in the traveling direction and applies a reinforcing material to the inner peripheral surface of the portion restored by the pipe restoring mechanism;
The conduit restoring mechanism and the reinforcement dispensing device, stiffener dispensing apparatus have a, a moving means for moving so as to be located in the restored existing pipe portion,
The conduit restoring mechanism has a pressing means for pressing back the strain deformed portion;
Heating means for heating the strain deformed portion before pressing the strain deformed portion by the pressing means;
A cooling means for cooling the pushed back part after pushing back the strain deformation part by the pushing means and before releasing the pressed state;
Further comprising
The pressing means has a pressing plate that comes into contact with the strain deformation portion,
In the pressing plate,
As the heating means, a heating medium supply pipe for supplying a heated heating medium to the inner peripheral surface of the strain deformation portion,
As the cooling means, a cooling medium supply pipe for supplying the cooled medium to the pushed back portion is provided,
The reinforcing material application device is:
A reinforcing material attached body to which the reinforcing material is attached;
Reinforcing material diameter increasing means for expanding the diameter of the reinforcing material so that the attached reinforcing material is applied to the inner peripheral surface of the restored part;
Reinforcing material curing means for curing the expanded reinforcing material;
Pipe rehabilitation system, characterized by have a. The reinforcing material is formed of a photocurable resin,
The conduit rehabilitation system according to claim 1 , wherein the reinforcing material curing means includes a light emitter that emits light having a wavelength for curing the photocurable resin. The pipeline rehabilitation system according to claim 1 or 2 , wherein the reinforcing material application device is connected to the rear of the pipeline restoration mechanism. A pipe rehabilitation method using the pipe rehabilitation system according to any one of claims 1 to 3 ,
A pipe restoring mechanism alignment step for moving the pipe retreading system so that the pipe restoring mechanism is located at a strain deformation portion of the existing pipe;
After the pipeline restoration mechanism alignment step, a restoration step of restoring the strain deformation part in the existing pipe by the pipeline restoration mechanism;
After the restoration step, the reinforcing material application device alignment step of moving the pipe rehabilitation system so that the reinforcing material application device reaches the position of the pressed portion of the existing pipe,
After the reinforcing material application device alignment step, a reinforcing material diameter increasing step for expanding the diameter of the reinforcing material,
After the reinforcing material diameter increasing step, the reinforcing material curing step of curing the reinforcing material by the reinforcing material curing means,
A pipeline rehabilitation method characterized by comprising:

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