Inversion lining device, gate device used for the same, and method of pasting lining material to existing pipe

Abstract

To provide a compact device that reduces an occupation area of the device of an aboveground portion, and repairs an existing pipe by inverting a lining material.SOLUTION: An inversion lining device comprises: a lining material feed-out device 13 for feeding-out a lining material 12 at a predetermined speed; an inversion nozzle part 15 for inverting the lining material 12 fed-out from the lining material feed-out device 13; and a gate device 17 provided between the lining material feed-out device 13 and the inversion nozzle part 15 so as to allow them communicate with each other. The gate device 17 has: a cylindrical main body part 63 with an upstream side end in the feed-out direction of the lining material 12 attachably / detachably connected to the lining material feed-out device 13, and with a downstream side end in the feed-out direction of the lining material 12 connected to the inversion nozzle part 15; an openable / closable gate 31 for opening / closing an opening 28 formed on an upstream side end of the main body part 63; and a pressurized air introduction port for introducing pressurized air.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a reverse lining device that reverses and inserts a lining material into an existing buried pipe to repair the pipe, a gate device used therein, and a method of applying a lining material to an existing pipe. [Background technology]

[0002] When repairing existing buried pipes, a non-excavation method called lining material inversion is known (see, for example, Patent Document 1). In the lining material inversion method, lining material impregnated with thermosetting resin is inverted at the tip of a nozzle, pressurized and inserted into the existing pipe from a shaft, and then the resin is thermally hardened by steam heating and affixed to the inside of the existing pipe. Compared to conventional excavation methods, this method minimizes disruption to ground traffic and requires a short construction period, making it suitable for the land conditions of Japan, which has a small land area.

[0003] According to the inverted lining method described in Patent Document 1, the lining material inverted by the inverted insertion device is inserted under pressure into an existing buried pipe from one shaft, and the lining material is pulled in from the other shaft by a pulling-in device or the like, making it possible to accommodate relatively long or bent existing pipes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-126783 A Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, the inversion lining method can reduce the impact on the ground compared to the conventional cut-and-cover method. However, on narrow roads and in densely populated residential areas, there are concerns that the inversion insertion device, pressurized air supply device, steam supply device, etc. installed on the ground may disrupt traffic and have an impact on the surrounding environment, even for a short period of time.

[0006] The present invention aims to provide a compact reversal lining device that reduces the area the device occupies above ground and repairs existing pipes by reversing lining material, and a method for applying lining material to existing pipes using said device. [Means for solving the problem]

[0007] In order to solve the above problems, the inverted lining device of the present invention comprises a lining material delivery device which delivers lining material at a predetermined speed, an inverted nozzle section which inverts the lining material delivered from the lining material delivery device, and a gate device provided between the lining material delivery device and the inverted nozzle section so that they are in communication with each other, and the gate device comprises a cylindrical main body section whose upstream end in the delivery direction of the lining material is detachably connected to the lining material delivery device and whose downstream end in the delivery direction of the lining material is connected to the inverted nozzle section, an opening / closing gate which opens and closes an opening formed in the upstream end of the main body section, and a pressurized air inlet which introduces pressurized air into the main body section.

[0008] According to this configuration, the opening / closing gate of the gate device is opened, and the lining material is transported from the lining material delivery device to the inside of the gate device through the opening at the upstream end, and the transported lining material is inverted and attached by the inversion nozzle unit connected to the downstream end, and when pressurized air is further supplied, the lining material inverted by the inversion nozzle unit can be inverted and inserted into the existing pipe. After the inversion insertion into the existing pipe is completed, the opening is closed by the opening / closing gate, and pressurized air is supplied from the pressurized air inlet to the inside of the main body unit, thereby maintaining the bulge of the lining material and preventing deformation. Then, the resin impregnated in the lining material hardens, and the lining material is applied to the inner surface of the existing pipe to repair the existing pipe. The resin impregnated in the lining material may be either a thermosetting resin or a room temperature curing resin. After the lining material is inserted into the existing pipe, the unnecessary lining material delivery device can be separated from the gate device and removed during the repair work, so that the work area occupied by the work and the construction equipment can be made compact. In this specification, the terms "upstream side" and "downstream side" are based on the feeding direction of the lining material.

[0009] In the inverted lining device according to the present invention, the gate device may further include a heated fluid inlet for introducing a heated fluid into the main body portion.

[0010] According to this configuration, when the lining material is impregnated with a thermosetting resin, the lining material inserted into the existing pipe can be quickly heat-cured by injecting a heating fluid into the main body of the gate device. For example, heated steam, high-temperature water, etc. can be used as the heating fluid.

[0011] In the inversion lining device of the present invention, the gate device has a gate opening / closing device that opens and closes the opening / closing gate, and the gate opening / closing device can be configured to have a rotating shaft that is connected to the opening / closing gate inside the main body and has both ends protruding outward from both side surfaces of the main body, and a pair of fluid pressure cylinders that are provided on both side surfaces of the main body, respectively, and act on rotating plates provided on both ends of the rotating shaft to rotate the opening / closing gate.

[0012] With this configuration, the opening can be opened and closed by rotating the pivot shaft and the opening gate connected to it with a pair of fluid pressure cylinders provided on both sides of the main body, so that the opening at the upstream end can be quickly closed after the lining material is transported to the existing pipe. Hydraulic cylinders or pneumatic cylinders can be used as the fluid pressure cylinders.

[0013] In the inverted lining device of the present invention, instead of the lining material feed-out device, a configuration can be adopted in which an opening / closing lid can be freely attached and detached to the main body part of the gate device so as to cover the opening of the main body part.

[0014] According to this configuration, instead of the lining material delivery device, an open / close lid is detachably attached to cover the opening of the main body, so that the airtightness inside the main body can be improved and the pressure and temperature can be maintained better when the lining material hardens in the existing pipe. Therefore, when the existing pipe is long or has a bent shape, and higher pressure air is required, the open / close lid can be provided to cope with this.

[0015] In the inversion lining device according to the present invention, the opening and closing lid may be configured to have a lid-side heated fluid inlet for introducing a heated fluid into the inside of the main body of the gate device.

[0016] According to this configuration, when an opening / closing lid is provided to maintain high airtightness, the heated fluid can be introduced through the lid-side heated fluid inlet directly downstream, making it possible to harden the thermosetting resin even if the existing pipe is long.

[0017] In the inverted lining device of the present invention, the lining material feeding device can be configured to have a cylindrical main body, a horizontal slit portion formed of an elastic member at the upstream end in the feeding direction of the lining material for slidingly introducing the lining material, a conveying mechanism equipped with a drive device for feeding the lining material introduced from the horizontal slit portion in the feeding direction, and a pressurized air inlet port for introducing pressurized air into the main body for pressurizing the lining material.

[0018] According to this configuration, the lining material is fed by the conveying mechanism of the lining material feeding device, so that the lining material is fed at a more adjusted and stable speed than when feeding only pressurized air, which is difficult to control, and the lining material can be properly reversed and inserted into the existing pipe. The conveying mechanism allows the conveying speed to be properly adjusted according to the length, shape, etc. of the existing pipe.

[0019] In addition, the gate device of the present invention is a gate device provided between a lining material delivery device which delivers lining material at a predetermined speed and an inversion nozzle section which inverts the lining material delivered from the lining material delivery device so that they are in communication with each other, and is configured to have a cylindrical main body section whose upstream end in the delivery direction of the lining material is detachably connected to the lining material delivery device and whose downstream end in the delivery direction of the lining material is connected to the inversion nozzle section, an opening / closing gate which opens and closes an opening formed in the upstream end of the main body section, and a pressurized air inlet port which introduces pressurized air into the main body section.

[0020] The gate device according to the present invention may further include a heated fluid inlet for introducing heated fluid into the main body.

[0021] The gate device of the present invention can be configured to have a gate opening / closing device that opens and closes the opening / closing gate, the gate opening / closing device having a rotating shaft that is connected to the opening / closing gate inside the main body and has both ends protruding outward from both side surfaces of the main body, and a pair of fluid pressure cylinders that are provided on both side surfaces of the main body, respectively, and act on rotating plates provided on both ends of the rotating shaft to rotate the opening / closing gate.

[0022] Furthermore, the method of applying a lining material to an existing pipe according to the present invention is a method of applying a lining material to an existing pipe using any one of the above-mentioned inversion lining devices, comprising: an apparatus installation step of installing the inversion lining device having the lining material delivery device, the gate device, and the inversion nozzle unit at a predetermined position near the existing pipe; and a step of inverting the lining material by the inversion nozzle unit after the lining material is delivered by the lining material delivery device in the inversion lining device and passes through the gate device in a state in which the opening / closing gate opens the opening. the lining material is inserted into the existing pipe by an inversion insertion process; an opening closing process in which the opening in the gate device is closed by the opening / closing gate after the insertion of the lining material into the existing pipe is completed; a device removal process in which the gate device and the lining feed-out device are released from their connection and the lining material feed-out device is removed after the opening in the gate device is closed by the opening / closing gate; and a resin hardening process in which the resin impregnated in the lining material inserted into the existing pipe is hardened after the lining feed-out device is removed.

[0023] In the method of applying a lining material to an existing pipe according to the present invention, the inverted lining device having a heated fluid inlet for introducing heated fluid into a main body portion is used, and the resin hardening process can include a heated resin hardening process for hardening the thermosetting resin impregnated in the lining material by heated fluid introduced into the main body portion of the gate device through the heated fluid inlet of the gate device.

[0024] In the method of applying a lining material to an existing pipe according to the present invention, an inverted lining device is used in place of the lining material delivery device, in which an opening / closing lid can be removably attached to the main body of the gate device so as to cover the opening, and the opening / closing lid has a lid-side heated fluid inlet for introducing heated fluid into the inside of the main body of the gate device, and the method includes a device replacement step of attaching an opening / closing lid to the main body of the gate device so as to cover the opening of the main body of the gate device in place of the lining material delivery device, and the resin hardening step includes a heating resin hardening step of hardening the thermosetting resin impregnated in the lining material by a heated fluid introduced into the main body of the gate device through the lid-side heated fluid inlet provided in the opening / closing lid while the opening / closing gate of the gate device opens the opening. Effect of the Invention

[0025] According to the present invention, after the lining material is inserted into the existing pipe, the lining material delivery device can be separated from the gate device and removed during the repair work, thereby reducing the work area and making the construction equipment more compact. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a vertical cross-sectional view of an inversion lining device (a gate device, a lining material delivery device, and an inversion nozzle portion) according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a vertical sectional view of a lining material delivery device included in the inverted lining device according to the embodiment of the present invention. [Diagram 3] FIG. 3 is a side view of the gate device according to the embodiment of the present invention (in a state in which the inverting nozzle section and the opening / closing lid are coupled to the gate device). [Figure 4] FIG. 4 is a cross-sectional view of a gate device according to an embodiment of the present invention (with an inverted nozzle unit connected to the gate device and an opening / closing lid removed). [Diagram 5]FIG. 5 is a vertical cross-sectional view of a gate device according to an embodiment of the present invention (in a state in which an inverted nozzle portion and a connecting member are coupled to the gate device). [Figure 6] FIG. 6 is a schematic diagram showing the transportation of a lining material to an existing pipe using an inverted lining device according to an embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing a heat treatment with steam on a lining material inserted into an existing pipe by a gate apparatus according to an embodiment of the present invention. [Figure 8] FIG. 1 is a flow chart showing the procedure for repair work (reversal lining work) on existing pipes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0028] The reverse lining device according to the embodiment of the present invention is configured as shown in Fig. 1. Fig. 1 is a vertical cross-sectional view of the reverse lining device (gate device, lining material delivery device, and reverse nozzle portion) according to the embodiment of the present invention.

[0029] As shown in Fig. 1, the inverted lining device 11 has a lining material delivery device 13 that delivers lining material 12 (the conveying direction is shown by arrow 14) for repairing an existing pipe at a predetermined speed, an inverted nozzle unit 15 that inverts the lining material 12, and a gate device 17 that is provided between the lining material delivery device 13 and the inverted nozzle unit 15 and is connected to communicate between them. The lining material delivery device 13 is provided on the upstream side of the delivery direction of the lining material 12, and the inverted nozzle unit 15 is provided on the downstream side.

[0030] The lining material delivery device 13 is structured such that the lining material 12 delivered from a delivery roll 21 mounted on a vehicle is introduced from a lip portion 22, which is an inlet at the upstream end of the lining material delivery device 13, toward the inside, and is delivered to the gate device 17 via a conveying mechanism 23 driven by a drive device including a drive roller 56. In the lining material delivery device 13, the lining material 12 is delivered by pressurized air together with the conveying mechanism 23, and is reversed and inserted into the existing pipe via the gate device 17 and the reverse nozzle portion 15.

[0031] A cylindrical connection member 25 is detachably connected to the downstream end of the lining material delivery device 13, and a cylindrical connection member 26 is detachably connected to the upstream end of the gate device 17. The connection members 25 and 26 are detachably connected to each other, so that the lining material delivery device 13 and the gate device 17 are connected detachably and in communication with each other through the connection members 25 and 26. An opening 28 is formed at the upstream end of the gate device 17, and an opening / closing gate 31 is provided for opening and closing the opening 28 by rotating. An inverting nozzle section 15 is provided at the downstream end of the gate device 17, and the tip of the lining material 12 introduced from the opening 28 is inverted and attached by the inverting nozzle section 15. The inverted lining material 12 is sent toward the existing pipe by the conveying mechanism 23 of the lining material delivery device 13 and pressurized air.

[0032] Next, the lining material delivery device 13 that conveys and supplies the lining material 12 to the gate device 17 will be described with reference to FIG. 2. The lining material delivery device 13 has a body 41 that is a cylindrical cylindrical body, and a head 42 that is a cylindrical truncated cone-shaped body whose diameter decreases toward the downstream side of the body 41 (downstream side in the lining material conveying direction). The body 41 and the head 42 constitute the device main body 43. The downstream side of the head 42 is an opening, and the upstream end of the body 41 is formed with a wall surface 45. Furthermore, an inspection window 47 for inspecting the inside of the device main body 43 is provided at the top of the device main body 43, and installation tools 48 and 49 that extend in a direction intersecting the axial direction of the device main body 43 are provided at the downstream and upstream sides, respectively, at the bottom of the device main body 43. The lining material delivery device 13 is placed on a mounting table 50 by the installation tools 48 and 49. A cylindrical connecting member 25 having openings at the front and rear is detachably attached to the downstream end of the lining material delivery device 13 in order to connect to the gate device 17 .

[0033] A horizontally elongated slit-shaped lip portion 22 is provided on the wall surface 45 at the upstream end of the device body 43 of the lining material delivery device 13 as an inlet for introducing the lining material 12 from the outside. In order to maintain internal airtightness during the introduction of the lining material 12, the lip portion 22, which is a horizontally elongated slit portion, is composed of an upper lip portion 22a and a lower lip portion 22b made of an elastic member, and a slit portion through which the lining material 12 is introduced by sliding is formed between the upper lip portion 22a and the lower lip portion 22b with a small gap. In addition, a receiving roller 51 for receiving the lining material 12 is provided so as to protrude from the wall surface 45 so that the lining material 12 introduced into the lip portion 22 can be stably introduced. In addition, a hydraulic inlet port 53 for receiving hydraulic pressure from the outside and a pressurized air inlet port 54 for receiving pressurized air from the outside are provided at the lower part of the wall surface 45 of the device body 43.

[0034] Inside the device main body 43, there are provided a drive roller 56 for transporting the lining material 12 introduced from the lip portion 22 to the gate device 17 side, and a hydraulic motor 57 for driving the drive roller 56. The hydraulic motor 57 is driven via a control unit (not shown) by hydraulic pressure supplied from a hydraulic inlet 53. On the upper part of the drive roller 56, a presser roller 58 is provided for pressing the lining material 12 from above to prevent the lining material 12 being transported on the drive roller 56 from loosening or the like. The presser roller 58 can be moved up and down by an air cylinder 59, and the pressing force on the lining material 12 can be adjusted. The air cylinder 59 is driven via a control unit (not shown) by pressurized air supplied from a pressurized air inlet 54. The drive roller 56, the hydraulic motor 57, the presser roller 58, and the air cylinder 59 constitute a transport mechanism 23.

[0035] Furthermore, a lighting device 60 is provided on the ceiling of the device main body 43 to facilitate inspection through the inspection window 47. A pressure gauge 61 is provided on the upper part of the wall surface 45, which is the exterior of the device main body 43, to measure the pressure inside the device main body 43 as a guide to maintain a pressure suitable for pressure-feeding the lining material 12 into the existing pipe. The lining material 12 is pressure-feeded by pressurized air, which is supplied from the pressurized air inlet 54 into the device main body 43 under the control of a control unit (not shown). The lining material 12 is sent to the gate device 17 by the conveying mechanism 23 and the pressurized air, and is reversed by the reversing nozzle unit 15 and conveyed to the existing pipe. Compared to conveying by pressurized air alone, by adding conveying by the conveying mechanism 23, the pressure of the pressurized air is not excessively increased, and the lining material 12 can be conveyed reliably throughout the entire pipe without losing its shape, even if the pipe is long or bent.

[0036] 3, the gate device 17 has a cylindrical main body 63 and an opening / closing gate 31 provided at the upstream end (in the conveying direction of the lining material) of the main body 63 and rotatably opening and closing the opening 28 at the upstream end. At the bottom of the main body 63, supports 68 extending in a direction intersecting the axial direction of the main body 63 are provided at both the upstream end and the downstream end of the main body 63. The gate device 17 is placed on a box-shaped mounting table 69 by the supports 68.

[0037] A pressurized air inlet 71 is provided on the outer side of the main body 63, through which pressurized air is injected from an external pressurized air supply device 101 (air compressor) through a flexible pipe 102 into the inside of the gate device 17 (see Figs. 6 and 7). The pressurized air inlet 71 is provided with an operating lever 72 for opening and closing the pressurized air inlet 71. Furthermore, a steam inlet 73 (heated fluid inlet) is provided on the outer side of the main body 63, side by side with the pressurized air inlet 71, through which heated steam is injected from an external steam supply device 105 (boiler) through a flexible pipe 106 into the inside of the gate device 17 (see Figs. 6 and 7). The supply of steam is controlled, for example, by a control unit of the steam supply device. Pressurized air at a predetermined pressure is supplied by the pressurized air supply device 101, the flexible pipe 102, the pressurized air inlet 71, and the operating lever 72. Moreover, steam as a heating fluid is supplied at a predetermined temperature by the steam supplying device 105, the flexible pipe 106, and the steam inlet 73. Note that as the heating fluid, a high-temperature fluid (for example, high-temperature water) may be used in addition to the above-mentioned heated steam.

[0038] Furthermore, on the outer side surface of the main body 63, a pair of driving cylinders 75a, 75b, which are fluid pressure cylinders, are provided at positions symmetrical along the axial direction of the main body 63 (see FIG. 2). The driving cylinders 75a, 75b are air cylinders operated by pressurized air, and convert the back and forth motion of the air cylinders into a rotational motion to open and close the opening and closing gate 31. The gate opening and closing device 80 (see FIG. 4), which is the opening and closing device, will be described in detail later.

[0039] The inverted nozzle section 15, which is formed by integrating a truncated cone-shaped connecting section 15a and a cylindrical mouth section 15b, is connected to the downstream end of the main body section 63. The inverted nozzle section 15 has openings at both the upstream end and downstream end, and the lining material 12 is transported through the inverted nozzle section 15. The larger of the upper and lower bottom surfaces of the truncated cone shape of the connecting section 15a is connected to the downstream end of the main body section 63, and the mouth section 15b of the same diameter is provided integrally with the smaller bottom surface. The lining material introduced from the upstream opening section 28 of the main body section 63 is inverted at its tip and attached to the inverted nozzle section 15 by being fastened by a mounting tool 76 (see FIG. 5).

[0040] A pivotable opening / closing gate 31 for opening and closing the opening 28 is provided at the upstream end of the main body 63. When the gate device 17 is released from the lining material delivery device 13, an opening / closing lid 66 is detachably attached and connected to the upstream end of the main body 63 by fasteners (e.g., bolts and nuts) so as to cover the opening 28 in place of the lining material delivery device 13. Furthermore, at the center of the opening / closing lid 66, a lid-side steam inlet 77 (lid-side heating fluid inlet) for injecting heated steam from an external steam supply device 105 (boiler) into the inside of the gate device 17 through a flexible pipe 107 is provided so as to protrude to the outside (see FIG. 7). Steam, which is a heating fluid, is supplied into the gate device 17 by the steam supply device 105, the flexible pipe 107, and the lid-side steam inlet 77. As the heating fluid, a high-temperature fluid (e.g., high-temperature water) may be used in addition to the above-mentioned heated steam.

[0041] As shown in Figs. 3 to 5, the pivotable opening / closing gate 31 in the gate opening / closing device 80 is a cover body having a curved surface shape that is convex toward the outside, and is joined to a pivot shaft 83 of a rod-shaped member via supports 81a and 81b. The pivot shaft 83 extends in the horizontal direction, and both ends thereof protrude from both sides of the main body 63 to the outside and are joined to pivot plates 85a and 85b. The pivot plates 85a and 85b are joined to the rods of the drive cylinders 75a and 75b, and are rotated in the forward and reverse directions by the extension and contraction of the rods of the drive cylinders 75a and 75b, respectively. The rotation of the pivot plates 85a and 85b rotates the opening / closing gate 31 via the pivot shaft 83 to open and close the opening 28 on the upstream side. The opening / closing gate 31 rotates between a position for closing the opening 28 and a predetermined position at the top inside the main body 67 by the rotation of the pivot shaft 83 due to the extension and contraction of the rods of the drive cylinders 75a and 75b. The gate opening / closing device 80 includes the opening / closing gate 31, supports 81a, 81b, a rotating shaft 83, rotating plates 85a, 85b, and drive cylinders 75a, 75b. When the gate device 17 is small and the opening / closing gate 31 is lightweight, the opening / closing gate 31 may be opened and closed by manually operating a lever or the like.

[0042] With reference to FIG. 5, a state in which the lining material 12 (shown by a two-dot chain line) is introduced into the gate device 17 and inverted and attached to the inverted nozzle section 15 will be described. The lining material 12 is a cylindrical pipe material (tube shape) extending in the axial direction, and is made by covering the outer surface of a cylindrical nonwoven fabric impregnated with uncured thermosetting resin with a highly airtight film. The lining material 12 is introduced from an opening 28 at the upstream end of the gate device 17. The opening / closing gate 31 at the upstream end of the gate device 17 is operated by the driving cylinders 75a and 75b to open the opening 28, and the lining material 12 is introduced into the inside of the gate device 17 from the opening 28. As will be described later, a cylindrical connecting member 26 with openings at the front and rear is detachably attached to the upstream end of the main body section 63 of the gate device 17 in order to connect to the lining material delivery device 13 (see FIG. 4 and FIG. 5). The introduced lining material 12 is discharged from the inverting nozzle section 15 connected to the upstream end of the gate device 17, inverted, and attached to the outer periphery of the inverting nozzle section 15 by fastening the tip with a fixture 76. After being inverted by the inverting nozzle section 15, the lining material 12 is conveyed by the conveying mechanism 23 of the lining material pay-out device 13, and is also inverted and pressure-fed to the existing pipe 90 (see Figures 6 and 7) by pressurized air from the lining material delivery device 13 introduced from the opening 28. After being inverted, the lining material 12 is conveyed to the existing pipe 90 with the outside being a nonwoven fabric impregnated with uncured thermosetting resin and the inside being a highly airtight film.

[0043] Next, the operation procedure of repair work (reverse lining work) of an existing pipe by the reversal lining device 11 (gate device 17, lining material delivery device 13 and reversal nozzle section 15) will be described with reference to Figs.

[0044] Work space is secured at a shaft 91 at one end of the existing pipe 90 where repair work will be performed, and a shaft 92 at the other end. The condition of the existing pipe (bends, branches, rust) is checked using a camera or the like. If further cleaning is required, a high-pressure cleaning vehicle is arranged to perform the cleaning, and other preparations prior to the repair work are made (repair preparation process: S11).

[0045] Next, as shown in Fig. 6, an inverted lining device 11 including a lining material delivery device 13, a gate device 17, and an inverted nozzle unit 15, which is equipment for inverted lining work, which is a repair work for an existing pipe, is installed (equipment installation process: S12). Specifically, the inverted lining device 11 is installed on the ground near a vertical shaft 91 on one end side, which is the side where the lining material 12 is inserted into the existing pipe 90, and is composed of an inverted nozzle unit 15, a gate device 17 connected to the inverted nozzle unit 15, and a lining material delivery device 13 connected to the gate device via connection members 26 and 25, in that order from closest to the vertical shaft 91. Furthermore, a vehicle-mounted delivery roll 21, a steam supply device (boiler) 105, a pressurized air supply device (air compressor) 101, and a hydraulic supply device 108 (hydraulic tank and hydraulic pump) are installed. The steam supply device 105 is connected to the steam inlet 73 of the gate device 17 via a flexible pipe 106. The pressurized air supply device 101 is connected to the pressurized air inlet 71 of the gate device 17 via a flexible pipe 102, and to the pressurized air inlet 54 of the lining material delivery device 13 via a flexible pipe 112. The hydraulic supply device 108 is connected to the hydraulic inlet 53 of the lining material delivery device 13 via a flexible pipe 111 (see FIG. 5).

[0046] Next, the lining material 12 is taken out from the pay-out roll 21 and introduced into the inside of the lining material delivery device 13 from the lip portion 22, and further introduced into the inside from the opening 28 at the upstream end of the gate device 17, where the tip portion of the lining material 12 is inverted and fastened and attached by the mounting fixture 76 at the inversion nozzle portion 15 connected to the downstream end of the gate device 17 (see Figure 5). Before the lining material 12 is introduced, the gate opening / closing device 80 of the gate device 17 rotates the opening / closing gate 31 to open the opening 28. Then, as shown in Fig. 6, the lining material 12 advances diagonally downward from the inverted nozzle portion 15 through the vertical shaft 91 by pressure feeding using pressurized air supplied inside the lining material delivery device 13 and delivery by the transport mechanism 23, and further advances through the existing pipe 90 from one end of the existing pipe 90 (inverted insertion process: S13). When the lining material 12 reaches the other end of the existing pipe 90, its advance is stopped by the lining material stopper 95, and the inverted insertion process is completed.

[0047] Next, as shown in FIG. 7, when the inverted insertion of the lining material into the existing pipe 90 is completed, the drive cylinders 75a and 75b of the gate opening / closing device 80 of the gate device 17 are operated to rotate the opening / closing gate 31 to close the opening 28 (see FIG. 4) (opening closing process: S14). At this time, pressurized air is injected into the inside from the pressurized air inlet 71, so that the expansion of the lining material 12 can be maintained, and the occurrence of slackness and wrinkles in the lining material 12 can be suppressed (see FIG. 3). Thereafter, the connection members 26 and 25 are removed to release the connection between the gate device 17 and the lining material delivery device 13. Then, the released lining material delivery device 13 is removed from the repair work site (device removal process: S15). In addition, together with removing the lining material delivery device 13, the connecting members 25, 26, the vehicle-mounted delivery roll 21 and the hydraulic supply device 108 can also be removed, making it possible to reduce the equipment area on the ground at the repair site of the existing pipe and minimizing disruption to traffic, etc. caused by on-site equipment.

[0048] As shown in FIG. 7, instead of the lining material delivery device 13, a removable open-close lid 66 is connected to the main body 67 so as to cover the opening 28 of the gate device 17 (device replacement step: S16) (see FIG. 3 and FIG. 4). Then, the water vapor supply device 105 is connected to the lid-side water vapor inlet 77 of the open-close lid 66 of the gate device 17 via a flexible pipe 107. This allows water vapor to be introduced into the interior from the lid-side water vapor inlet 77 in addition to the water vapor inlet 73. When water vapor is introduced from the lid-side water vapor inlet 77, the open-close gate 31 is opened and the opening 28 is opened. By injecting water vapor into the interior from the lid-side water vapor inlet 77 or the water vapor inlet 73, water vapor can be sent to the lining material 12 in the existing pipe 90 together with the pressurized air from the pressurized air inlet 71, and the thermosetting resin of the lining material 12 can be hardened (heated resin hardening step: S17). As a result, the lining material 12 after inversion has an outer surface made of nonwoven fabric impregnated with uncured thermosetting resin and an inner surface made of highly airtight film, so that it can be hardened by heating and applied to the inner surface of the existing pipe 90, thereby repairing the existing pipe 90.

[0049] In addition, when the existing pipe 90 is relatively short and has a straight structure, the above-mentioned openable / closeable lid 66 is not used, and the openable / closeable gate 31 is closed and the heating resin hardening process can be performed using steam from the steam inlet 73. When a large amount of heated steam and high-pressure air needs to be supplied, such as when the existing pipe 90 is long or curved, the openable / closeable lid 66 with a high degree of sealing is used. After the heating resin hardening process is completed, the lining material 12 is treated at the mouth of the existing pipe 90, and the mouth of the existing pipe 90 is waterproofed (piping treatment process: S18). Then, the inner surface of the restored existing pipe 90 is inspected and confirmed, and all equipment required for the repair work of the existing pipe 90 is collected and removed (equipment recovery process: S19). The work is completed when the shafts 91 and 92 are restored to their original state.

[0050] In the above-mentioned repair work (reverse lining work) for the existing pipe 90, when inserting the lining material 12 into the existing pipe 90, the lining material delivery device 13 is used (see FIG. 6), and after the lining material has been inserted into the existing pipe 90, the lining material delivery device 13 is removed together with the vehicle-mounted delivery roll 21 (see FIG. 7). When the lining material 12 is heat-cured, the inside of the gate device 17 can be sealed by the open / close gate 31 and the open / close lid 66, so that the lining material delivery device 13 becomes unnecessary by introducing heated steam and pressurized air into the gate device 17. After the lining material 12 has been inserted into the existing pipe 90, the lining material delivery device 13 is removed by releasing the connection with the gate device 17. As a result, in the repair work (reverse lining work) for the existing pipe, it is possible to minimize the disruption to ground traffic without occupying a large facility area for construction work on the ground for a long time. In particular, in narrow, densely populated areas and places with heavy traffic, the inversion lining work according to this embodiment can be carried out with compact equipment, minimizing the area occupied above ground.

[0051] In the inverted insertion process of the lining material 12 into the existing pipe 90 (S13 in FIG. 8), the lining material 12 is inserted by mechanical delivery by the conveying mechanism 23 of the lining material delivery device 13 and by pressurized air, but the pressurized air may be delivered by the gate device 17 in addition to the pressurized air delivered by the lining material delivery device 13. When the existing pipe 90 has a long pipeline, it is considered effective to use both devices to keep the pressure constant.

[0052] In the above embodiment, the case where the lining material is impregnated with thermosetting resin has been described, but the present invention is not limited to this. Instead of thermosetting resin, the lining material can be impregnated with room temperature curing resin, and the resin can be applied to the existing pipe by curing to perform repairs. When room temperature curing resin is used, the steam inlet 73 (heating fluid inlet) of the gate device 17, the lid side steam inlet 77 (lid side heating fluid inlet), the steam supply device (boiler) 105, and the flexible pipes 106 and 107 are not required, making the overall system more compact.

[0053] Although several embodiments of the present invention and modified examples of each part have been described above, these embodiments and modified examples of each part are presented as examples and are not intended to limit the scope of the invention. These novel embodiments described above can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims. [Industrial Applicability]

[0054] According to the present invention, after the lining material is inserted into the existing pipe, the lining material delivery device included in the inverted lining device during the hardening of the lining material can be removed, which has the effect of making the construction equipment on the ground more compact. Therefore, the inverted lining device is useful as a device for repairing an existing pipe with a lining material. [Explanation of symbols]

[0055] 11 Reverse lining device (reverse nozzle section 15, gate device 17 and lining material delivery device 13) 12 Lining material 13 Lining material delivery device 15 Reversing nozzle section 15a Mouth 15b Connection part 17 Gate device 22 Lip section (horizontal slit section) 22a Upper lip 22b Lower lip 23 Conveyor mechanism 25, 26 Connection members 28 Opening 31 Opening and closing gate 41 Torso 42 Head 43 Device main body 47 Inspection window 53 Hydraulic inlet 54 Pressurized air inlet 56 Drive roller 57 Hydraulic Motor 58 Presser roller 59 Air Cylinder 66 Opening and closing cover 67 Main body 71 Pressurized air inlet 72 Operating lever 73 Water vapor inlet 75a, 75b Drive cylinder section 76 Mounting fixture 77 Lid side steam inlet (lid side heating fluid inlet) 80 Gate opening and closing device 83 Rotating shaft 85a, 85b Rotating plate 90 Existing pipes 91, 92 Standing 101 Compressed air supply device (air compressor) 105 Steam supply equipment (boiler) 108 Hydraulic supply system (hydraulic tank and hydraulic pump)

Claims

1. a lining material delivery device that delivers the lining material at a predetermined speed; An inversion nozzle portion that inverts the lining material delivered from the lining material delivery device; a gate device provided between the lining material delivery device and the inverted nozzle portion so that they communicate with each other; The gate device includes: a cylindrical main body portion having an upstream end portion in a feeding direction of the lining material, the upstream end portion being detachably connected to the lining material feeding device and a downstream end portion in the feeding direction of the lining material, the downstream end portion being connected to the inverting nozzle portion; an opening / closing gate configured to open and close an opening formed at the upstream end of the main body; and a pressurized air inlet for introducing pressurized air into the body portion.

2. 2. The inverted lining apparatus according to claim 1, wherein the gate device further comprises a heating fluid inlet for introducing a heating fluid into the body portion.

3. 3. The inverted lining device according to claim 1 or 2, wherein the gate device has a gate opening / closing device for opening and closing the opening / closing gate, the gate opening / closing device having a rotating shaft connected to the opening / closing gate inside the main body and having both ends protruding outward from both side surfaces of the main body, and a pair of fluid pressure cylinders provided on both side surfaces of the main body, respectively, and operating on rotating plates provided on both ends of the rotating shaft to rotate the opening / closing gate.

4. 3. The inverted lining device according to claim 1, wherein, instead of the lining material delivery device, an opening / closing cover can be detachably connected to the main body of the gate device so as to cover the opening of the main body.

5. 5. The inverted lining device according to claim 4, wherein the opening and closing lid has a lid-side heated fluid inlet for introducing heated fluid into the inside of the main body of the gate device.

6. The lining material delivery device includes a cylindrical main body and a horizontally elongated slit portion formed of an elastic member and provided at an upstream end portion in a sending direction of the lining material for slidingly introducing the lining material; A conveying mechanism including a driving device that conveys the lining material introduced from the horizontal slit portion in a conveying direction; 2. The inverted lining device according to claim 1, further comprising a pressurized air inlet for introducing pressurized air for pressurizing and feeding the lining material into the main body.

7. A gate device provided between a lining material delivery device that delivers a lining material at a predetermined speed and a reversing nozzle portion that reverses the lining material delivered from the lining material delivery device so that they communicate with each other, a cylindrical main body portion having an upstream end portion in a feeding direction of the lining material, the upstream end portion being detachably connected to the lining material feeding device and a downstream end portion in the feeding direction of the lining material, the downstream end portion being connected to the inverting nozzle portion; an opening / closing gate configured to open and close an opening formed at the upstream end of the main body; A gate device having a pressurized air inlet for introducing pressurized air into the main body.

8. 8. The gate apparatus according to claim 7, further comprising a heating fluid inlet for introducing a heating fluid into said body portion.

9. 9. The gate device according to claim 7 or 8, further comprising a gate opening / closing device for opening and closing the opening / closing gate, the gate opening / closing device comprising: a rotating shaft connected to the opening / closing gate inside the main body and having both ends protruding outward from both side surfaces of the main body; and a pair of fluid pressure cylinders provided on both side surfaces of the main body, respectively, which act on rotating plates provided on both ends of the rotating shaft to rotate the opening / closing gate.

10. A method for applying a lining material to an existing pipe using the inverted lining device according to any one of claims 1 to 6, an apparatus installation process for installing the inversion lining apparatus having the lining material delivery apparatus, the gate apparatus, and the inversion nozzle portion at a predetermined position near the existing pipe; an inversion insertion process in which the lining material is fed by the lining material feed device in the inversion lining device and passes through the gate device in a state in which the opening / closing gate opens the opening, and is inverted by the inversion nozzle portion and inserted into the existing pipe; an opening closing process in which the opening in the gate device is closed by the opening / closing gate after the lining material is inserted into the existing pipe; an apparatus removal process of removing the lining material delivery device by releasing the connection between the gate device and the lining material delivery device after the opening is closed by the opening / closing gate in the gate device; a resin hardening step of hardening the resin impregnated in the lining material inserted into the existing pipe after the lining delivery device is removed.

11. Using the inverted lining device according to claim 2, The method for applying a lining material as described in claim 10, wherein the resin hardening process includes a heating resin hardening process for hardening the thermosetting resin impregnated in the lining material by a heating fluid introduced into the main body portion of the gate device through the heating fluid inlet of the gate device.

12. Using the inverted lining device according to claim 5, a device replacement step of connecting an opening / closing lid to the main body part of the gate device so as to cover the opening of the main body part in place of the lining material delivery device, The method for applying a lining material as described in claim 10, wherein the resin hardening process includes a heating resin hardening process in which, while an opening / closing gate in the gate device opens the opening, a heating fluid is introduced into the main body of the gate device through the lid side heating fluid inlet provided in the opening / closing lid to harden the thermosetting resin impregnated in the lining material.

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