Inverted lining device and method

Abstract

To provide an inversion lining device equipped with a compact and inexpensive inversion insertion device capable of being installed near an opening of an existing pipe to be rehabilitated without specifying a length of one operation.SOLUTION: There is provided an inversion lining device, comprising: an inversion insertion device 4 arranged on one end side of an existing pipe P; a pressurized fluid supply source for supplying pressurized fluid; a lining material 2 that covers and rehabilitates an inner peripheral surface of the existing pipe P; and a pull-back member detachably connected to a connecting end of the lining material 2. The inversion insertion device 4 has a housing body 42 defining a pressure space 6, an opening changing structure 60 is provided on one end side of the housing body 42. When the lining material 2 is introduced into the housing body 42, the material is introduced through a first-shaped first introduction opening 62 corresponding to a cross-sectional shape of the lining material 2 folded into a flat shape. When the pull-back member is introduced, the member is introduced through a second-shaped second introduction opening corresponding to a cross-sectional shape of the pull-back member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an inversion lining device used for rehabilitating existing pipes such as water supply pipes, sewerage pipes, agricultural water pipes, and construction water pipes, and to an inversion lining method for rehabilitating such existing pipes. [Background technology]

[0002] When existing pipes buried underground (e.g., water supply pipes, sewerage pipes, agricultural water pipes, construction water pipes, etc.) become deteriorated, a lining device (lining method) has been proposed that rehabilitates the pipeline by covering the inner surface of the pipeline with a lining material without excavating the pipeline (see, for example, Patent Document 1).

[0003] In this inversion lining device (inversion lining method), an inversion insertion device is used to invert and insert the lining material into the existing pipe. This inversion insertion device is equipped with a pressure housing equipped with a pay-out roll, and the lining material is wound around the pay-out roll inside the pressure housing. The lining material used is, for example, one impregnated with a thermosetting resin.

[0004] When inserting this lining material into the existing pipe, a pressurized fluid (e.g., compressed air) is supplied into the pressure housing, and the lining material is inserted into the existing pipe while being inverted using the pressure of the compressed air. After the lining material is inverted and inserted, for example, high-temperature steam is supplied to the inside of the lining material, and the heat of the steam hardens the impregnated thermosetting resin, thus making the lining material adhere to the inner peripheral surface of the existing pipe, thereby rehabilitating the existing pipe. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-1544 A Summary of the Invention [Problem to be solved by the invention]

[0006] In this inverted lining device (inverted lining method), the lining material is housed in the pressure housing of the inverted insertion device, and the lining material is inserted into the existing pipe while being inverted using the pressure of the pressure fluid supplied into the pressure housing. Therefore, the length of one operation of covering the existing pipe with the lining material is limited by the size of the pressure housing, and for example, in the case of an existing pipe with an inner diameter of 50 cm, the limit is about 100 m. This creates a problem in that construction over long work sections is not possible.

[0007] Furthermore, since the pressure housing of the inversion insertion device is configured to supply pressurized fluid thereto, the pressure housing must be robust enough to withstand pressure, making the device large, heavy, and expensive.

[0008] Furthermore, if the inversion insertion device becomes large and heavy, the location where it can be installed is restricted to above-ground areas far from the opening of the existing pipe to be rehabilitated, etc. There is a problem that a device with restricted installation is difficult to use on a pipeline where a pipe (existing pipe) that requires the inversion lining method is laid.

[0009] The object of the present invention is to provide an inverted lining device and method equipped with a small, inexpensive inverted insertion device that does not specify the length of construction in one go and can be installed near the opening of an existing pipe to be rehabilitated. [Means for solving the problem]

[0010] The inverted lining device of the present invention is an inverted lining device including: an inverted insertion device disposed on one end side of an existing pipe; a pressure fluid supply source for supplying a pressure fluid to a pressure space of the inverted insertion device; a lining material for covering and rehabilitating an inner peripheral surface of the existing pipe; and a pull-back member detachably connected to a connection end of the lining material, The inversion insertion device has a housing body that defines the pressure space, An end wall is provided on one end side of the housing body, and a communication opening is provided in the end wall, The housing body The aboveAt one end side, there is an opening change structure that can be changed to a first introduction opening of a first shape corresponding to the cross-sectional shape of the lining material folded flat and a second introduction opening of a second shape corresponding to the cross-sectional shape of the pull-back member. the opening change structure includes a first mounting member having the first introduction opening and a second mounting member having the second introduction opening, Furthermore, a first seal member having a third introduction opening is disposed between the end wall of the housing body and the first mounting member, the third introduction opening of the first seal member corresponds to a shape of the first introduction opening of the first mounting member and is smaller than the first introduction opening, and an inner peripheral portion defining the third introduction opening of the first seal member protrudes inwardly beyond the inner peripheral portion of the first introduction opening of the first mounting member, The lining material is inverted and inserted from one end side of the existing pipe by utilizing the pressure of the pressure fluid from the pressure fluid supply source, Introducing the folded lining material In the first half of the inversion insertion, The first mounting member is attached to the end wall of the housing body, the folded lining material is introduced into the pressure space of the housing body through the first introduction opening of the first mounting member, the third introduction opening of the first seal member, and the communication opening of the end wall, and the pull-back member is introduced. In the latter half of the inversion insertion, The second mounting member is attached to the end wall of the housing body, and the pullback member is introduced through the second introduction opening of the second mounting member and the communication opening of the end wall. It is characterized by:

[0013] In this inverted lining device, It is preferable to chamfer the opening periphery on the introduction side that defines the first introduction opening of the first mounting member, and by configuring it in this way, the edge of the first introduction opening does not scratch the outer surface of the lining material introduced therethrough, and damage to the lining material when introduced into the first introduction opening can be prevented. Note that examples of chamfering include R (radius) processing and taper processing.

[0015] In addition, it is preferable to match the height position of the first introduction opening of the opening change structure at one end side of the housing body with the height position of the radial center of the existing pipe.By configuring in this manner, the lining material that passes through the first insertion opening is reversed and inserted in a straight line toward the radial center of the existing pipe, thereby reducing resistance during reverse insertion and enabling smooth insertion.

[0016] Furthermore, the inverted lining method of the present invention is an inverted lining method for rehabilitating an existing pipe by inverting and inserting a lining material from one end side of the existing pipe using a pressure fluid supplied to a pressure space of a housing body of an inverted insertion device, thereby covering the inner circumferential surface of the existing pipe, The lining material is disposed at one end of the existing pipe in a state where it is folded flat, and a pull-back member is connected to the connecting end of the lining material in a detachable manner, and an opening change structure is provided at one end of the housing body, which can change the opening into a first introduction opening of a first shape corresponding to the cross-sectional shape of the folded lining material and a second introduction opening of a second shape corresponding to the cross-sectional shape of the pull-back member, the opening change structure includes a first mounting member having the first introduction opening, a second mounting member having the second introduction opening, and a first seal member having a third introduction opening, the third introduction opening of the first seal member corresponds to a shape of the first introduction opening of the first mounting member and is smaller than the first introduction opening, and an inner peripheral portion defining the third introduction opening of the first seal member protrudes more inward than the inner peripheral portion of the first introduction opening of the first mounting member, Introducing the folded lining material In the first half of the inversion insertion, The first mounting member is attached to the end wall of the housing body, and the first seal member is disposed between the end wall of the housing body and the first mounting member. The folded lining material is introduced into the pressure space of the housing body through the first introduction opening of the first mounting member, the third introduction opening of the first seal member, and the communication opening of the end wall, and the pull-back member is introduced. In the latter half of the inversion insertion, The second mounting member is attached to the end wall of the housing body, and the pullback member is introduced through the second introduction opening of the second mounting member and the communication opening of the end wall. It is characterized by: Effect of the Invention

[0020] According to the inverted lining device and method of the present invention, the inverted lining device has a housing body that defines a pressure space, and an opening change structure is provided on one end side of the housing body. In the first half of the inverted insertion of the lining material, the lining material folded flat is introduced into the pressure space through the first introduction opening of the opening change structure, so that leakage of the pressurized fluid from the pressure space when the lining material is introduced can be suppressed, and in the second half of the inverted insertion, the pull-back member is introduced into the pressure space through the second introduction opening of the opening change structure, so that leakage of the pressurized fluid from the pressure space when the pull-back member is introduced can be suppressed. In addition, the lining material is arranged on one end side of the existing pipe in a state where it is folded flat, and the lining material in this state is inverted and inserted into the existing pipe through the housing body of the inverted insertion device, so that even when performing rehabilitation work on a long pipeline, a large housing body is not required, and the inverted insertion of the lining material can be performed with a relatively small inverted insertion device. In addition, a first mounting member having a first introduction opening and a second mounting member having a second introduction opening can be used as the opening change structure, and when the first mounting member is attached to the end wall of the housing main body, a first introduction opening can be provided in this end wall, and when the second mounting member is attached to the end wall of the housing main body, a second introduction opening can be provided in this end wall. Furthermore, it is preferable to dispose a first seal member having a third introduction opening between the end wall of the housing body and the first mounting member, and to have the inner circumferential portion defining the third introduction opening of the first seal member protrude more inward than the first introduction opening of the first mounting member.By configuring in this manner, the inner circumferential portion of the seal member comes into close proximity to or into contact with the outer circumferential surface of the lining material introduced through the first introduction opening, thereby minimizing leakage of pressurized fluid between the seal member and the lining material while reducing friction between them. [Brief description of the drawings]

[0022] [Figure 1] 1 is a cross-sectional view showing a simplified embodiment of an inverted lining device according to the present invention; [Diagram 2]FIG. 3 is a cross-sectional view showing a lining material used for rehabilitating a pipeline. [Diagram 3] 2 is a cross-sectional view showing an inverting and inserting device in the inverting lining device of FIG. 1. [Figure 4] 4 is a partial front view showing an end wall of a housing body of the reverse charging device of FIG. 3 and its vicinity. [Diagram 5] 5 is a front view showing a first mounting member of the opening modification structure attached to the housing body of FIG. 4. [Figure 6] 5 is a front view showing a second mounting member of the opening modification structure attached to the housing body of FIG. 4. [Figure 7] 2 is a cross-sectional view showing a pipe sealing structure attached to the other end of the existing pipe in the inverted lining device of FIG. 1. FIG. [Figure 8] 13 is a cross-sectional view showing the state in which the lining material has been inverted and inserted and reached the target position. FIG. [Figure 9] 2 is a cross-sectional view showing a state in which a pullback member is inserted into the inverting and inserting device in the inverting lining device of FIG. 1. [Figure 10] 13 is a cross-sectional view showing a state in which a lubricant is sprayed onto a first introduction opening of the inversion insertion device and its vicinity. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of an inverted lining device (and an inverted lining method) according to the present invention will be described with reference to the accompanying drawings.

[0024] In Fig. 1, the illustrated inverted lining device includes an inverted insertion device 4 for inverting and inserting a lining material 2 (see also Fig. 2) from one end side (left end side in Fig. 1) of an existing pipe P, a pressure fluid supply source 8 for supplying a pressure fluid (e.g., compressed air) to a pressure space 6 of the inverted insertion device 4, a suction source 10 for sucking the lining material 2 to be inverted and inserted from the other end side (right end side in Fig. 1) of the existing pipe P, and a pipe sealing structure 11 for sealing the other end of the existing pipe P. The existing pipe P (e.g., buried pipe such as a water supply pipe, a sewerage pipe, or an agricultural water pipe) is buried in the ground 16, for example, so that one end side protrudes into a first vertical shaft 13 and the other end side protrudes into a second vertical shaft 14. Furthermore, when the existing pipe P is completely buried, a first vertical shaft 13 is excavated at a predetermined location in the ground 16 so that one end of the existing pipe P protrudes into this first vertical shaft 13, and a second vertical shaft 14 is excavated at another predetermined location in the ground 16 so that the other end of the existing pipe P protrudes into this second vertical shaft 14.

[0025] When rehabilitating this buried pipe P, as shown in Fig. 1, a reversing and inserting device 4 is installed on one end side of the existing pipe P (in this embodiment, the first vertical shaft 12 side), and a pressure fluid supply source 8 is arranged in association with this reversing and inserting device 4, and this pressure fluid supply source 8 is composed of, for example, a compressed air supply device 18 (for example, a compressor, etc.). Also, a suction source 10 is installed on the other end side of the existing pipe P (in this embodiment, the second vertical shaft 14 side), and this suction source 10 is composed of, for example, an air suction machine 20 (for example, a suction pump, etc.).

[0026] In this embodiment, the lining material 2 is placed on the loading platform 24 of a vehicle 22 such as a work truck in a flat folded state, and is transported on the vehicle 22 to the repair site of the existing pipe P. The inversion insertion device 4, the pressure fluid supply source 8, the pipe sealing structure 11, and the suction source 10 are also loaded on the vehicle and transported to the repair site, and as shown in FIG. 1, the inversion insertion device 4 is installed in the first vertical shaft 13 facing one end protruding portion of the existing pipe P, and the pressure fluid supply source 8 is installed on the ground 16 adjacent to the first vertical shaft 13. Furthermore, the pipe sealing structure 11 is attached to the other end of the existing pipe P in the second vertical shaft 14, and the suction source 10 is installed on the ground 16 adjacent to the second vertical shaft 14.

[0027] Next, the lining material 2 used in this inverted lining device will be described mainly with reference to Figures 1 and 2. As can be seen from Figure 1, the lining material 2 used for repairing the existing pipe P is longer than the axial length of the existing pipe P to be rehabilitated, and one end side is open and the other end side is closed. As this lining material 2, for example, a well-known one having a two-layer structure is used, in which a resin-impregnated layer 26 impregnated with a thermosetting resin is provided on the radial inside and an airtight coating layer 28 having airtightness is provided on the radial outside, and when the lining material 2 is inverted and inserted as described later, the resin-impregnated layer 26 and the airtight coating layer 28 are inverted so that the resin-impregnated layer 26 comes into contact with and covers the inner peripheral surface of the existing pipe 10.

[0028] The resin-impregnated layer 26 of the lining material 2 may have a single layer or a multi-layer structure, and in this embodiment, a three-layer structure is used, for example, one having two resin nonwoven fabric layers 30, 32 stacked on top of each other and a reinforcing fiber layer 34 interposed between the resin nonwoven fabric layers 30, 32. The material of the resin nonwoven fabric layers 30, 32 is a base material impregnated with a liquid thermosetting resin, and is preferably a material having flexibility and excellent resin impregnation properties, and nonwoven fabrics made of, for example, polyester, high-performance polyethylene, polypropylene, etc. can be used. The material of the reinforcing fiber layer 34 can be a reinforcing fiber material such as glass fiber, aramid fiber, or carbon fiber.

[0029] The airtight covering layer 28 can be formed from, for example, a synthetic resin film material that is impermeable to pressurized fluids (e.g., compressed air), and this synthetic resin film material can be formed from a polyethylene film, a soft polyvinyl chloride resin film, or the like.

[0030] Next, the inverting and insertion device 4 will be described with reference to Fig. 1 and Fig. 3. The inverting and insertion device 4 shown in Fig. 3 mainly includes a housing body 42 that defines a pressure space 6, and in this embodiment, the housing body 42 is composed of, in order from the introduction side (the left side in Figs. 1 and 3), a first housing part 44 whose outer diameter gradually decreases toward the downstream side, a cylindrical second housing part 46 connected to the downstream end of the first housing part 44, and an attachment housing part 48 connected to the downstream end of the second housing part 46.

[0031] An end wall 50 is provided at one end of the housing body 42, i.e., the upstream end of the first housing portion 44. An inlet opening 52 is provided at the top of the end wall 50. An elongated communication opening 54 is provided in the lateral direction (perpendicular to the paper in Figs. 1 and 3, left and right in Figs. 5 and 6) at approximately the center of the end wall 50. The inlet opening 52 of the end wall 50 is connected to a pressure fluid supply source 8 (compressed air supply device 18) via a pressure fluid flow path 56 (e.g., a compressed air flow path). Thus, pressure fluid from the pressure fluid supply source 8 is supplied to the pressure space 6 of the housing body 42 through the pressure fluid flow path 56. A one-path opening / closing valve 57 for opening and closing the flow path 56 is provided in the pressure fluid flow path 56.

[0032] Also, an opening modification structure 60 is provided so as to cover the communication opening 54 of the end wall 50. In this embodiment, the opening modification structure 60 includes a first attachment member 64 (see FIG. 5) having a first introduction opening 62, and a second attachment member 68 (see FIG. 6) having a second introduction opening 66. With reference to FIGS. 4 and 5, the first introduction opening 62 of the first attachment member 64 has a first shape corresponding to the cross-sectional shape of the lining material 2 folded flat, and is a slit-like shape elongated in the horizontal direction, with both ends formed in a semicircular shape.

[0033] The first mounting member 64 is attached to the end wall 50 of the housing body 42 by screwing a plurality of mounting bolts 70 (see Figure 4) through through holes 72 (see Figure 5) of the first mounting member 64 into the end wall 50. In this attached state, the first introduction opening 62 of the first mounting member 64 is located inside the communication opening 54 of the end wall 50. With this configuration, the lining material 2 folded flat is introduced into the pressure space 6 of the housing body 42 through the first introduction opening 62 of the first mounting member 64 and then through the communication opening 54 of the end wall 50.

[0034] As can be seen from FIG. 9, a pull-back member 76 is detachably connected to the closed connection end 73 of the lining material 2 folded flat, although not clearly shown. After the lining material 2 is inverted and inserted into the existing pipe P, the pull-back member 76 is introduced into the existing pipe P. The pull-back member 76 can be made of, for example, a wire, a rope, or a belt. In relation to such a configuration, the second introduction opening 66 of the second mounting member 68 is formed in a second shape corresponding to the cross-sectional shape of the pull-back member 76. In this embodiment, since the pull-back member 76 is made of a wire, the second introduction opening 66 of the second mounting member 68 is formed in a circular shape corresponding to the outer diameter (cross-sectional shape) of the wire, but the pull-back member 76 may be made of a belt, in which case the second introduction opening 66 is formed in an elongated slit shape corresponding to the outer shape (cross-sectional shape) of the belt.

[0035] The second mounting member 68 is attached to the end wall 50 of the housing body 42 by screwing a plurality of mounting bolts 70 through through holes 74 (see Figure 6) into the end wall 50. In this attached state, the second introduction opening 66 of the second mounting member 68 is positioned inside the communication opening 54 of the end wall 50. With this configuration, the retraction member 76 is introduced into the pressure space 6 of the housing body 42 through the second introduction opening 66 of the second mounting member 68 and further through the communication opening 54 of the end wall 50.

[0036] As shown in FIGS. 3 and 4, a seal member 78 is provided between the end wall 50 of the housing body 42 and the first mounting member 64. (First sealing member) By providing the seal member 78 in this manner, it is possible to seal between the end wall 50 and the first mounting member 64. The seal member 78 can be made of, for example, synthetic rubber.

[0037] The seal member 78 is provided with a third introduction opening 80, which corresponds to the shape of the first introduction opening 62 of the first mounting member 64 and is preferably formed to be somewhat smaller than the first introduction opening 62. With this configuration, as shown in Fig. 4, the inner peripheral portion defining the third introduction opening 80 of the seal member 78 protrudes somewhat (for example, about 1 to 3 mm) toward the inner peripheral side from the inner peripheral portion of the first introduction opening 62 of the first mounting member 64. With this configuration, the inner peripheral portion of the seal member 78 comes close to or into contact with the outer peripheral surface of the lining material 2 introduced through the first introduction opening 62 of the first mounting member 64, thereby reducing the leakage of the pressurized fluid to the outside while suppressing friction between the seal member 78 and the lining material 2, and suppressing the pressure drop in the housing main body 42 (pressurized space 6).

[0038] In addition, a seal member (not shown) is provided between the end wall 50 of the housing body 42 and the second mounting member 68, similar to the first mounting member 64. (Second sealing member)In this case, it is preferable that the fourth introduction opening of the seal member is formed in a shape corresponding to the shape of the second introduction opening 66 of the second mounting member 68 and is somewhat smaller than the second introduction opening 66. With this configuration, the inner peripheral portion defining the fourth introduction opening of the seal member protrudes somewhat toward the inner peripheral side from the inner peripheral portion of the second introduction opening 66 of the second mounting member 68 (see FIG. 6). With this configuration, the inner peripheral portion of the seal member comes close to or into contact with the outer peripheral surface of the pull-back member 76 introduced through the second introduction opening 66 of the second mounting member 68, thereby making it possible to suppress the leakage of the pressurized fluid to the outside while suppressing the friction between the seal member 78 and the pull-back member 76.

[0039] 3, it is preferable to chamfer the opening peripheral portion on the introduction side that defines the first introduction opening 62 of the first mounting member 64 to provide an R portion 82 to make it easier to slide, and by configuring in this way, it is possible to prevent the lining material 2 from getting caught on the opening peripheral portion of the first introduction opening 62 and being damaged when being introduced through the first introduction opening 62 of the first mounting member 64. Note that examples of chamfering include R processing in which the opening peripheral portion of the first introduction opening 62 is processed to be rounded and an R (radius) portion 82 is provided, or taper processing in which the opening peripheral portion of the first introduction opening 62 is processed to expand toward the upstream side and a tapered portion (not shown) is provided.

[0040] Such chamfering may also be provided on the introduction side opening peripheral portion that defines the second introduction opening 66 of the second mounting member 68, in which case it is possible to prevent the retraction member 76 from getting caught on the opening peripheral portion of the second introduction opening 66 and being damaged.

[0041] The lining material 2 is attached to the housing main body 42 (the mounting housing portion 48) of the inverting and inserting device 4, for example, as follows. Mainly referring to FIG. 3, in order to attach the lining material 2, the first mounting member 64 is attached to the end wall 50 of the housing main body 42. Meanwhile, the lining material 2 is folded flat, and the lining material 2 thus folded is introduced into the housing main body 42 through the first introduction opening 62 of the first mounting member 64 and passes through the housing main body 42 so as to protrude therefrom. Then, one end portion 84 protruding from the housing main body 42 is folded back outward and attached to the outer circumferential surface of the mounting housing 48, and the folded back one end portion 84 in this attached state is fixed to the outer circumferential surface of the mounting housing portion 48 by using a cable tie 86. Furthermore, this one end 84 (specifically, the part inside the part tied with the cable tie 86) is fixed using an airtight retaining ring 88 to maintain an airtight state between the housing main body 42 and the lining material 2, and in this manner, the one end 84 of the lining material 2 is attached to the mounting housing portion 48 of the housing main body 42.

[0042] Next, a pipe sealing structure 11 for an inverted lining device will be described with reference to Figures 7 and 8 as well as Figure 1. The illustrated pipe sealing structure 11 includes a cap member 90 for closing the other end of an existing pipe P. The cap member 90 has a circular end wall 92 and a peripheral side wall 94 extending from the outer periphery of the end wall 92, and is attached to cover the other end of the existing pipe P. When the cap member 90 is attached, the end wall 92 closes the other end opening of the existing pipe P, and the peripheral side wall 94 covers the outer periphery of the other end of the existing pipe P.

[0043] In this embodiment, the cap member 90 is attached to the existing pipe P so as to be movable over a predetermined range in the axial direction. That is, a movable member 96 is attached to the other end of the existing pipe P so as to be movable in the axial direction. In addition, a connecting flange 98 that protrudes radially outward is provided on a peripheral side wall 94 of the cap member 90, and the connecting flange 98 and the movable member 96 are connected via a connecting means 100.

[0044] The illustrated connecting means 100 has a plurality of (e.g., three or four) bolt shafts 102 arranged at intervals in the circumferential direction, and these bolt shafts 102 are attached by inserting them through the movable member 96 and the connecting flange 98 of the cap member 90. The head side of each bolt shaft 102 is connected to the movable member 96 by the head of the bolt shaft 102 and a nut 104 screwed onto it, and the threaded side of the bolt shaft 102 is connected to the cap member 90 by a nut 106 screwed onto the threaded portion of each bolt shaft 102.

[0045] A ring-shaped abutment member 108 is attached to the other end of the existing pipe P. The abutment member 108 is configured by connecting a pair of approximately semicircular members 110 with bolts 112 and nuts 114, and is disposed between the cap member 90 and the moving member 96. By providing the abutment member 108 in this manner, when the cap member 90 moves in the direction indicated by an arrow 116 (see FIG. 7) as described below, the moving member 96 also moves together with the cap member 90, and the moving member 96 abuts against the abutment member 108, thereby preventing the above-mentioned movement of the moving member 96 and the cap member 90 (see FIG. 8).

[0046] A suction opening 118 is provided at the approximate center of the end wall 92 of the cap member 90, and this suction opening 118 is connected to the suction source 6 (air suction machine 20) via a suction flow passage 120, and a second flow passage opening / closing valve 122 for opening and closing this flow passage 120 is provided in the suction flow passage 120. As configured in this manner, the suction force from the suction source 6 acts on the other end of the existing pipe P through the suction flow passage 120 and the suction opening 118 of the cap member 90. In order to improve the sealing performance between the cap member 90 and the existing pipe P, an annular seal member 124 is provided between the outer circumferential surface of the existing pipe P and the inner circumferential surface of the peripheral side wall 94 of the cap member 90.

[0047] Next, the rehabilitation work of an existing pipe P using this inversion lining device (inversion lining method) will be described mainly with reference to Fig. 1, Fig. 3, Fig. 7 to Fig. 9. To carry out this rehabilitation work, as shown in Fig. 1, a vehicle 22 is parked near the first shaft 13 at one end of the existing pipe P to be repaired, and a lining material 2 folded flat is placed near the first shaft 12. In addition, an inversion insertion device 4 is transported to the first shaft 13 and installed in the first shaft 13, and a pressure fluid supply source 8 (compressed air supply device 18) is transported near the first shaft 13 and installed on the ground 16. Furthermore, at the other end of the existing pipe P, a suction source 10 (air suction machine 20) is transported near the second shaft 14 and installed on the ground 16.

[0048] The pressurized fluid supply source 8 and / or the suction source 10 may be mounted on a vehicle. In this case, the vehicle carrying the pressurized fluid supply source 8 may be parked near the first shaft 13, and the vehicle carrying the suction source 10 may be parked near the second shaft 14. The lining material 2 may be installed on the ground 16 near the first shaft 13, or on the bottom surface of the first shaft 13, instead of being mounted on the vehicle 22. When installed in the first shaft 13, the lining material 2 is guided from the folded state toward the first introduction opening 62 on the side of the reversing and inserting device 4 in a substantially horizontal manner, and thus the lining material 2 can be smoothly introduced through the first introduction opening 62.

[0049] Next, the pressure fluid supply source 8 and the inverting insertion device 4 (pressure space 6) are communicated through the pressure fluid flow path 56, and the suction source 10 and the pipe sealing structure 11 (its inner space) are communicated through the suction flow path 120. Furthermore, as shown in FIG. 3, one end 84 of the lining material 2 is inserted into the pressure space 6 through the first introduction opening 62 of the first mounting member 64, and is further inserted to protrude from the mounting housing part 48 of the housing main body 42, and the protruding one end 84 is folded back to the outside and attached to the outer circumferential surface of the mounting housing part 48. Then, a cable tie 86 is attached to the folded back one end 84 of the lining material 2 to fix it to the mounting housing part 48. Also, an airtightness retaining ring 88 is attached to the folded back one end 84 of the lining material 2 to seal between the lining material 2 and the mounting housing part of the housing main body 42.

[0050] Also, a pipe sealing structure 11 is attached to the other end of the existing pipe P (the portion protruding into the second vertical shaft 14) in order to seal the other end of the existing pipe P. When the other end of the existing pipe P does not protrude into the second vertical shaft 14, an auxiliary pipe that functions as a part of the existing pipe P is attached to the other end so that it protrudes into the second vertical shaft 14.

[0051] After preparing the lining material 2 and attaching the pipe sealing structure 62 in this manner, the lining material 2 is reversed and inserted. This reverse insertion is performed by opening the first flow path opening / closing valve 57 to introduce the pressurized fluid (compressed air) from the pressurized fluid supply source 8 into the housing body 42 as shown by the arrow (see FIG. 3), and opening the second flow path opening / closing valve 122 to apply the suction force from the suction source 10 to the inside of the pipe sealing structure 11 as shown by the arrow (see FIG. 7).

[0052] 1, the lining material 2 is inserted into the existing pipe P while turning over due to the pressure of the pressurized fluid introduced into the housing body 42, and accompanying this insertion, the folded lining material 2 is introduced into the housing body 42 through the first introduction opening 62 of the first mounting member 64. Then, when the lining material 2 is introduced in this manner, the pressurized fluid (compressed air) from the pressurized fluid supply source 8 acts on the lining material 2, and the lining material 2 is propelled inside the existing pipe P toward the other end while turning over.

[0053] During this reverse insertion, suction force from the suction source 10 acts on the other end side of the existing pipe P, i.e., on the inside of the pipe sealing structure 11. Therefore, positive pressure due to the pressurized fluid (compressed air) acts from the inside of the lining material 2 that is reversely inserted from one end side of the existing pipe 10, and negative pressure due to the suction action acts from the outside of the lining material 2 on the other end side, so that the lining material 2 is drawn into the existing pipe P while being reversed by the positive pressure from one end side and the negative pressure from the other end side, and the propulsive force for this drawing can be increased.

[0054] During this reverse insertion, as shown in FIG. 1, it is preferable to install the reverse insertion device 4 in the first vertical shaft 13 so that the height position of the first introduction opening 62 on the reverse insertion device 4 side (first mounting member 64) coincides with the height position of the radial center of the existing pipe P. By configuring in this manner, the lining material 2 introduced through the first introduction opening 62 on the housing main body 42 side is propelled inside the existing pipe P in a horizontal state, thereby enabling the reverse insertion of the lining material 2 to be performed smoothly.

[0055] When the lining material 2 is reversed and inserted, the pressure (positive pressure) applied to propel the lining material 2 from the insertion side is set to, for example, about 0.1 to 0.2 MPa, and the pressure (negative pressure) applied to suck the lining material 2 from the arrival side is set to, for example, about 0.03 to 0.07 MPa. By doing this, the reverse propulsive force of the lining material 2 can be increased by the negative pressure action from the arrival side, and the lining material 2 can be reversed and inserted into the existing pipe P with greater propulsive force.

[0056] When the lining material 2 is thus inserted in an inverted manner and the retracting member 76 is inserted into the housing body 42 through the first introduction opening 62 of the first mounting member 64, the first half of the inverted insertion of the lining material 2 is completed, and at this point, the connection state at the connection end 73 is temporarily released, and the end of the retracting member 76 is removed from the first introduction opening 62 of the first mounting member 64 (see FIG. 5). Then, the first mounting member 64 is removed from the end wall 50 of the housing body 42, and the second mounting member 68 is attached in place of the first mounting member 64. Furthermore, the end of the disconnected retracting member 76 is inserted into the housing body 42 through the second introduction opening 66 of the second mounting member 68, and then connected to the lining material 2, resulting in the above-mentioned state of the connection end 73. This connection end 73 can be composed of, for example, a ring member and an annular hook connected to each other, and the ring member is attached, for example, to the lining material 2 (or the retracting member 76), and the annular hook is attached, for example, to the retracting member 76 (or the lining material 2).

[0057] When replacing the first mounting member 64 with the second mounting member 68, the pressurized fluid supply source 8 and the suction source 10 are temporarily stopped. Then, after the replacement, their operation is resumed and the latter half of the inversion insertion of the lining material 2 is performed.

[0058] When the inverted insertion of the lining material 2 is resumed in this manner and reaches the other end of the existing pipe P, as can be seen from Figure 8, the inverted end of the lining material 2 abuts against the end wall 92 of the cap member 90 of the pipe sealing structure 11, and this cap member 90 moves in the direction indicated by arrow 116 (see Figure 7) (the connecting means 100 and the moving member 96 also move integrally), and this movement of the cap member 90 indicates that the lining material 2 has reached the other end of the existing pipe P.

[0059] 8, when the moving member 96 moves to the abutting member 110, the moving member 96 abuts against the abutting member 110, which stops the movement of the cap member 90 in the direction indicated by the arrow 116 and ends the reverse insertion of the lining material 2. In this embodiment, the abutment of the moving member 96 against the abutting member 110 makes it possible to confirm that the lining material 2 has reached the target position, and when the lining material 2 has been reversed and inserted to the target position in this manner, the operation of the suction source 6 is stopped.

[0060] In this inverted insertion state, the front and back sides of the lining material 2 are inverted and reversed, so that the resin-impregnated layer 26 is positioned radially outside the inner surface of the existing pipe 1P so as to cover it, and the airtight coating layer 28 is positioned radially inside the resin-impregnated layer 26 so as to cover it.

[0061] Thereafter, although not shown, the lining material 2 is thermally cured. During this thermal curing, the pipe sealing structure 11 is removed, and instead of this pipe sealing structure 11, a movement prevention member (not shown) is installed in the second shaft 14, and this movement prevention member prevents the lining material 2 from moving forward. Also, an exhaust pipe (not shown) is inserted into the end of the lining material 2 protruding from the other end of the existing pipe P, and the other end of this exhaust pipe is connected to an exhaust valve device (not shown) and opened to the atmosphere through this exhaust valve device.

[0062] In addition, a boiler unit (not shown) is used to generate heated steam, and the steam from the boiler unit is mixed with the pressurized fluid from the pressurized fluid supply source 8 in a mixing device (not shown). The pressurized fluid containing the steam is supplied to the housing body 42 of the inversion insertion device 4 through the pressurized fluid flow path 56. The heat of the steam hardens the resin-impregnated layer 26 (i.e., the impregnated resin) of the lining material 2, and thus the repair work for the existing pipe 10 is performed.

[0063] After this heat hardening, the pulling back member 76 is pulled back to recover the airtight coating layer 28. That is, the pulling back member 76 is pulled back to peel off the airtight coating layer 28 from the resin-impregnated layer 2 fixed to the inner peripheral surface of the existing pipe P, and thus the airtight coating layer 28 is recovered. Thereafter, both ends of the lining material 2 protruding outward from the existing pipe P are, for example, cut and removed, and thus the existing pipe P is repaired.

[0064] The above describes the inverted lining device (and inverted lining method) according to the present invention, but the present invention is not limited to such an embodiment, and various changes and modifications are possible without departing from the scope of the present invention.

[0065] For example, in the embodiment described above, the opening modification structure 60 is composed of a first mounting member 64 having a first introduction opening 62 and a second mounting member 68 having a second introduction opening 66. However, instead of such a configuration, a first introduction opening may be provided in the end wall 50 of the housing main body 42, and the opening modification structure may be composed of the end wall 50 having this first introduction opening and an opening modification member (not shown) having a second introduction opening. In this case, by attaching the opening modification member to this end wall, a second introduction opening is provided in the end wall 50 of the housing main body 42.

[0066] 10, for example, can be configured so that the lining material 2 is smoothly introduced through the first introduction opening 62. In this example, in FIG. 10, a spray nozzle 132 is disposed in association with the first introduction opening 62 of the first mounting member 64, and a lubricant supply source 134 (e.g., a lubricant tank) and the spray nozzle 132 are connected via a lubricant flow path 136.

[0067] In this configuration, the lubricant 138 from the lubricant supply source 134 is fed to the spray nozzle 132 through the lubricant passage 136, and is sprayed from the spray nozzle 132 toward the first introduction opening 62 of the first mounting member 64 and its vicinity. Therefore, the lubricant 138 improves the slipperiness of the lining material 2, reducing friction during introduction through the first introduction opening 62 and enabling smoother introduction of the lining material 2. The lubricant 138 may be sprayed manually by an operator.

[0068] Also, for example, in the above-mentioned inverted lining device, the cap member 90 functions as a part of the arrival position detection means for detecting that the lining material 2 has reached the arrival position, and the movement of this cap member 90 is visually observed to confirm that the lining material 2 has reached the arrival point, but instead of such a configuration, an arrival detection sensor (not shown) may be used to automatically detect the arrival of the lining material 2. In this case, for example, an arrival detection sensor (e.g., a mechanical switch, an optical sensor, etc.) may be attached to the abutting member 108, and this arrival detection sensor may detect the moving member 96 to detect the arrival of the lining material 2 at the arrival position.

[0069] Also, for example, in the above-described embodiment, when the lining material 2 is inserted inverted, the pressure (positive pressure) of the pressurized fluid from the pressurized fluid supply source 8 is applied to the lining material 2 at one end side of the existing pipe P, and the suction force (negative pressure) from the suction source 10 is applied to the lining material 2 at the other end side of the existing pipe P. However, if the pressurized fluid from the pressurized fluid supply source 8 is sufficient, the suction source 10 that applies the suction force may be omitted, and only the pressure (positive pressure) of the pressurized fluid from the pressurized fluid supply source 8 may be applied.

[0070] In the above embodiment, the first mounting member 64 has the first introduction opening 62 (slit opening) of a predetermined length, but multiple types of first mounting members 64 having different lengths of the first introduction opening 62 may be used. In this case, when repairing an existing pipe P with a small inner diameter, a small-sized lining material 2 is used. Therefore, a first mounting member 64 having a first introduction opening 62 (slit opening) of a length corresponding to the size of the lining material 2 is selected and used, and by doing so, one inversion insertion device 4 can be used to handle repair work of multiple types of existing pipes P with different inner diameters, that is, it can be applied to multiple types of lining materials 2 with different sizes.

[0071] Furthermore, for example, in the above-described embodiment, the invention has been described as being applied to a lining material 2 that is thermally cured using heated steam after being inverted and then inserted, but is not limited to such a configuration and can be similarly applied to a lining material that is cured using, for example, ultraviolet light (ultraviolet light lamp, ultraviolet light LED, etc.) after being inverted and can be widely applied to lining materials that are inverted and inserted into existing pipes 10 using pressurized fluid. [Explanation of symbols]

[0072] 2 Lining material 4. Reversal Insertion Device 6 Pressure Space 8. Pressure Fluid Supply Source 11 Tube sealed structure 13 1st Shaft 14 2nd Shaft 26 Resin impregnated layer 28 Airtight coating layer 42 Housing body 60 Opening change structure 62 First inlet opening 64 First mounting member 66 Second Introduction Aperture 68 Second mounting member 76 Retraction member 78 Sealing material 90 Cap member P Existing pipe

Claims

1. An inverted lining device comprising: an inverted insertion device disposed on one end side of an existing pipe; a pressure fluid supply source for supplying pressure fluid to a pressure space of the inverted insertion device; a lining material for covering and rehabilitating an inner circumferential surface of the existing pipe; and a pull-back member detachably connected to a connection end of the lining material, The inversion insertion device has a housing body that defines the pressure space, an end wall is provided on one end side of the housing body, and a communication opening is provided in the end wall, an opening change structure is provided on the one end side of the housing body, the opening change structure being changeable between a first introduction opening of a first shape corresponding to the cross-sectional shape of the lining material folded flat and a second introduction opening of a second shape corresponding to the cross-sectional shape of the pull-back member, the opening change structure including a first attachment member having the first introduction opening and a second attachment member having the second introduction opening; Furthermore, a first seal member having a third introduction opening is disposed between the end wall of the housing body and the first mounting member, the third introduction opening of the first seal member corresponds to a shape of the first introduction opening of the first mounting member and is smaller than the first introduction opening, and an inner peripheral portion defining the third introduction opening of the first seal member protrudes inwardly further than an inner peripheral portion of the first introduction opening of the first mounting member, an inverted lining device characterized in that the lining material is inverted and inserted from one end side of the existing pipe by utilizing the pressure of the pressurized fluid from the pressurized fluid supply source, and in the first half of the inverted insertion in which the folded lining material is introduced, the first mounting member is attached to the end wall of the housing body, and the folded lining material is introduced into the pressure space of the housing body through the first introduction opening of the first mounting member, the third introduction opening of the first sealing member, and the communicating opening of the end wall, and in the second half of the inverted insertion in which the pull-back member is introduced, the second mounting member is attached to the end wall of the housing body, and the pull-back member is introduced through the second introduction opening of the second mounting member and the communicating opening of the end wall.

2. The inverted lining device described in claim 1, characterized in that a second seal member having a fourth introduction opening is arranged between the end wall of the housing body and the second mounting member, the fourth introduction opening of the second seal member corresponds to the shape of the second introduction opening of the second mounting member and is smaller than the second introduction opening, the inner peripheral portion defining the fourth introduction opening of the second seal member protrudes more inwardly than the inner peripheral portion of the second introduction opening of the second mounting member, and when the retraction member is introduced, the retraction member is introduced through the second introduction opening of the second mounting member, the fourth introduction opening of the second seal member and the communicating opening of the end wall.

3. 2. The inverted lining device according to claim 1, wherein a peripheral edge of the first mounting member on the introduction side that defines the first introduction opening is chamfered.

4. The inversion lining device according to claim 1, characterized in that the height position of the first introduction opening of the opening change structure provided on the one end side of the housing body coincides with the height position of the radial center of the existing pipe.

5. A method for rehabilitating an existing pipe by inserting a lining material from one end of the existing pipe into a pressure space of a housing body of an inverted insertion device, covering the inner circumferential surface of the existing pipe, comprising: The lining material is disposed at one end of the existing pipe in a state where it is folded flat, and a pull-back member is connected to a connecting end of the lining material in a detachable manner, and an opening change structure is provided at one end of the housing body, which can change the opening into a first introduction opening of a first shape corresponding to the cross-sectional shape of the folded lining material and a second introduction opening of a second shape corresponding to the cross-sectional shape of the pull-back member, the opening change structure includes a first mounting member having the first introduction opening, a second mounting member having the second introduction opening, and a first seal member having a third introduction opening, the third introduction opening of the first seal member corresponds to a shape of the first introduction opening of the first mounting member and is smaller than the first introduction opening, and an inner peripheral portion defining the third introduction opening of the first seal member protrudes more inward than the inner peripheral portion of the first introduction opening of the first mounting member, An inverted lining method, characterized in that in the first half of the inverted insertion for introducing the folded lining material, the first mounting member is attached to the end wall of the housing body and the first sealing member is arranged between the end wall of the housing body and the first mounting member, and the folded lining material is introduced into the pressure space of the housing body through the first introduction opening of the first mounting member, the third introduction opening of the first sealing member and the communicating opening of the end wall, and in the second half of the inverted insertion for introducing the pull-back member, the second mounting member is attached to the end wall of the housing body, and the pull-back member is introduced through the second introduction opening of the second mounting member and the communicating opening of the end wall.

6. The opening modification structure further includes a second seal member having a fourth introduction opening, the fourth introduction opening of the second seal member corresponds to a shape of the second introduction opening of the second mounting member and is smaller than the second introduction opening, and an inner peripheral portion defining the fourth introduction opening of the second seal member protrudes more inward than the inner peripheral portion of the second introduction opening of the second mounting member, The inversion lining method according to claim 5, characterized in that, when the pullback member is introduced, the second mounting member is attached to the end wall of the housing body, and the second seal member is disposed between the end wall of the housing body and the second mounting member, and the pullback member is introduced through the second introduction opening of the second mounting member, the fourth introduction opening of the second seal member, and the communication opening of the end wall.

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