Obstruction method using an obturator

Abstract

To provide a blocking device which performs a regeneration method for constructing a regeneration pipe on an inner wall of an existing aged fluid pipe without imposing use restrictions on a branch pipe, and to provide a blocking method.SOLUTION: A blocking device 1 may be inserted into a confluence port E of a branch pipe D and a communication port F of a regeneration pipe B and includes: a cylindrical base material 2 in which a drain channel capable of connecting the branch pipe with the regeneration pipe is formed; an airbag which is provided around the cylindrical base material and may expand or contract; an excessive expansion restricting sheet 4 which is installed at the exterior of the airbag to restrict excessive expansion of the airbag; and a protection sheet 5 which is provided on an outer peripheral surface of the excessive expansion restricting sheet and may block an opening of a gap between a sewer pipe A and the regeneration pipe.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a closing device for closing an opening of a gap between a fluid pipe and a rehabilitation pipe when lining an inner wall of an aged existing fluid pipe with a rehabilitation pipe. Place It concerns the obturation method used. [Background technology]

[0002] Patent Document 1 discloses a sewer pipe rehabilitation method in which a synthetic resin rehabilitation pipe is lined on the inner wall of an existing deteriorated sewer pipe. In this method, a rehabilitation pipe is first inserted into the sewer pipe, and the rehabilitation pipe is closely attached to the inner wall of the sewer pipe to form a lining.

[0003] Next, the area of ​​the branch pipe connected to the sewer pipe near the junction with the sewer pipe is sealed, and a small hole is opened from inside the sewer pipe at a location in the rehabilitated pipe corresponding to the junction, and grout material is pressed in through the small hole and seeps into the space between the inner wall surface of the sewer pipe and the outer wall surface of the rehabilitated pipe.

[0004] After a predetermined time has passed and the grout material has hardened, the seal plug is removed and a portion corresponding to the junction is opened from the branch pipe side, thereby connecting the branch pipe and the rehabilitated pipe. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2002-52612 A Summary of the Invention [Problem to be solved by the invention]

[0006] The above-mentioned sewer pipe rehabilitation method requires that the branch pipes be sealed for a long period of time until the grout material hardens to prevent the sewage in the branch pipes from flowing down into the sewer pipes, which poses the problem of imposing discharge restrictions on sewer users for long periods of time.

[0007] Therefore, a closed system that can perform a rehabilitation method of constructing a rehabilitation pipe on the inner wall of an aged existing fluid pipe without imposing restrictions on the use of branch pipes is proposed. blocking In order to provide such a method, a technical problem arises that must be solved, and the present invention aims to solve this problem. [Means for solving the problem]

[0010] above In order to achieve the above object, the blocking method according to the present invention comprises the steps of: A connecting hole that can be inserted into a branch pipe that joins a fluid pipe and a communication hole that is drilled in a rehabilitation pipe constructed in the fluid pipe corresponding to the joining hole. A method for closing an opening of a gap between the fluid pipe and the rehabilitation pipe using a closing device, comprising: The blocking device includes a cylindrical base material having a drainage channel formed therein capable of connecting the branch pipe and the rehabilitation pipe, an airbag provided around the cylindrical base material and capable of freely expanding and contracting, an over-inflation restriction sheet provided on the exterior of the airbag and restricting over-inflation of the airbag, and a protective sheet provided on the outer circumferential surface of the over-inflation restriction sheet and capable of blocking an opening of a gap between the fluid pipe and the rehabilitation pipe, and when the airbag expands, the cylindrical base material supports the airbag from the inside without elastically deforming, The method includes a step of placing the blocking device at the communication port and the junction port from the rehabilitation pipe side, and a step of inflating the airbag so that the protective sheet blocks the opening of the gap between the fluid pipe and the rehabilitation pipe.

[0011] According to this configuration, a blocking device is placed at the junction and communication openings from the rehabilitated pipe side, and the airbag inflates so that the protective sheet blocks the opening of the gap between the fluid pipe and the rehabilitated pipe, and the rehabilitated pipe and branch pipe are connected via a drainage channel.This means that even when a rehabilitated pipe is constructed, fluid flowing down in the branch pipe can be drained into the rehabilitated pipe, and the filling material filled in the gap between the fluid pipe and the rehabilitated pipe can be prevented from flowing into the rehabilitated pipe or branch pipe, and the fluid flowing down in the rehabilitated pipe or branch pipe can be prevented from mixing with the filling material. Effect of the Invention

[0012] According to the present invention, a method for rehabilitating a fluid pipe can be carried out without imposing restrictions on the use of branch pipes. [Brief description of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional view showing a state in which a sewer pipe has been rehabilitated by applying a blocking device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of a main part of FIG. [Diagram 3] FIG. 1 is a perspective view of an occlusion device. [Figure 4] FIG. 4 is a longitudinal cross-sectional view of the occlusion device shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a blocking device 1 according to one embodiment of the present invention will be described with reference to the drawings. Note that, in the following, when numbers, values, amounts, ranges, etc. of components are mentioned, unless otherwise specified or when it is clearly limited to a specific number in principle, the numbers are not limited to the specific numbers and may be more or less than the specific number.

[0015] In addition, when referring to the shape or positional relationship of components, etc., this includes things that are substantially similar or approximate to those shapes, etc., unless otherwise specified or considered to be clearly different in principle.

[0016] In addition, the drawings may exaggerate characteristic parts to make the features easier to understand, and the dimensional ratios of the components may not be the same as the actual ones. In addition, in cross-sectional views, hatching of some components may be omitted to make the cross-sectional structure of the components easier to understand.

[0017] As shown in Figs. 1 and 2, the blocking device 1 is used in a rehabilitation method for constructing a rehabilitation pipe B on the inner wall of a sewer pipe A serving as an existing deteriorated fluid pipe.

[0018] The rehabilitating pipe B is constructed inside the sewer pipe A by combining multiple divisible segments. The gap between the sewer pipe A and the rehabilitating pipe B is filled with a filler C such as epoxy resin, mortar, or grout material.

[0019] Before the filler C is poured into the gap between the sewer pipe A and the rehabilitating pipe B, the blocking device 1 is inserted into the junction port E of the branch pipe D that merges with the sewer pipe A and into the communication port F that is drilled corresponding to the junction port E of the rehabilitating pipe B, and blocks the opening of the gap between the sewer pipe A and the rehabilitating pipe B. The configuration of the blocking device 1 will be described below.

[0020] As shown in FIGS. 3 and 4, the closure device 1 includes a tubular substrate 2, an airbag 3, an over-inflation restricting sheet 4, and a protective sheet 5. The closure device 1 includes a tubular substrate 2, an airbag 3, an over-inflation restricting sheet 4, and a protective sheet 5.

[0021] The cylindrical base material 2 is formed in a substantially cylindrical shape, has a smaller diameter than the branch pipe D, and extends longer than the gap between the sewer pipe A and the rehabilitation pipe B. The cylindrical base material 2 is made of a material such as metal, concrete, polyvinyl chloride, polyethylene, or polyolefin. The cylindrical base material 2 has a rigidity sufficient to support the inflation of the airbag 3, which will be described later, from the inside.

[0022] The cylindrical base material 2 has an inlet 21 provided at one end and an outlet 22 provided at the other end. A drainage channel 23 provided inside the cylindrical base material 2 and connecting the inlet 21 and the outlet 22 allows sewage flowing down the branch pipe D to pass through. The cylindrical base material 2 also has a communication hole 24 that connects the inside and outside. Reference numeral 25 denotes a crimping ring made of stainless steel or the like attached to both ends of the outer periphery of the cylindrical base material 2.

[0023] The airbag 3 is formed in a substantially cylindrical shape and is made of an airtight and flexible sheet such as rubber. The airbag 3 is integrated with the cylindrical base material 2 by bonding the inner peripheral surface of the airbag 3 to the outer peripheral surface of the cylindrical base material 2. The length of the airbag 3 can be changed as appropriate, but is preferably set to be longer than the gap between the sewer pipe A and the rehabilitation pipe B.

[0024] The airbag 3 includes an air hose 31 passing through the communication hole 24. The air hose 31 extends from the outlet 22 toward the outside, and is connected to an air pump (not shown) capable of supplying compressed air to the inside of the airbag 3. Thus, the airbag 3 is configured to be freely inflated and deflated by the inflow and outflow of compressed air.

[0025] The over-inflation limiting sheet 4 is made of a fabric having a high tensile strength and a high coefficient of friction, a low water permeability, and flexibility. The over-inflation limiting sheet 4 is formed in a generally cylindrical shape larger than the airbag 3, and is attached to the tubular base material 2 so as to accommodate and cover the airbag 3 therein. Both ends of the over-inflation limiting sheet 4 are crimped to the tubular base material 2 by exterior crimping rings 25.

[0026] The outer peripheral surface of the airbag 3 and the inner peripheral surface of the over-inflation limiting sheet 4 may be detachably attached via a double-sided tape (not shown). This integrates the airbag 3 and the over-inflation limiting sheet 4, and the over-inflation limiting sheet 4 follows the expansion and contraction of the airbag 3. Moreover, after releasing the pressure applied by the crimping ring 25, the over-inflation limiting sheet 4 can be removed from the cylindrical base material 2 by peeling it off from the airbag 3.

[0027] The protective sheet 5 is attached to the over-expansion limiting sheet 4 and is made of synthetic rubber such as chloroprene rubber that has elasticity in the thickness direction. The protective sheet 5 is detachably attached to the over-expansion limiting sheet 4 via double-sided tape (not shown). The protective sheet 5 is provided so as to cover substantially the entire surface of the over-expansion limiting sheet 4 except for a portion (the other end side) of the over-expansion limiting sheet 4. The length dimension of the protective sheet 5 is formed to be longer than the gap between the sewer pipe A and the rehabilitating pipe B.

[0028] Next, a procedure for blocking the junction port E and the communication port F using the blocking device 1 will be described with reference to Figs.

[0029] First, a rehabilitated pipe B is constructed by combining a plurality of segments inside a sewer pipe A. At this time, a predetermined gap is ensured between the sewer pipe A and the rehabilitated pipe B. A communication port F is drilled in the rehabilitated pipe B at a position corresponding to a junction port E of a branch pipe D. The diameter of the sewer pipe A is, for example, 800 mm or more, and the diameter of the branch pipe D is, for example, about 100 to 200 mm.

[0030] Next, an operator places the blocking device 1 into the junction port E and the communication port F from the rehabilitating pipe B side. At this time, one end of the blocking device 1 is inserted into the branch pipe D, and the other end of the blocking device 1 is disposed in the rehabilitating pipe B. In other words, the blocking device 1 is placed into the junction port E and the communication port F so as to be inserted into the junction port E and the communication port F without elastically deforming the cylindrical base material 2.

[0031] Next, compressed air is supplied from the air pump to the airbag 3. The airbag 3 gradually expands radially outward from the closing device 1, but the over-inflation restriction sheet 4 provided on the outer periphery of the airbag 3 restricts excessive expansion of the airbag 3 to maintain the inflated shape and protect the airbag 3 from damage, bursting, etc.

[0032] When the airbag 3 is inflated, the protective sheet 5 comes into close contact with the junction port E and the communication port F, closing the opening of the gap between the sewer pipe A and the rehabilitated pipe B. The rehabilitated pipe B and the branch pipe D are connected via the drainage channel 23 of the cylindrical base material 2, so that the sewage flowing down the branch pipe D can be drained into the rehabilitated pipe B.

[0033] Furthermore, since the single airbag 3 inflates to straddle the junction port E and the communication port F, the junction port E and the communication port F can be blocked with a simpler configuration than, for example, when the junction port E and the communication port F are each blocked with a separate airbag.

[0034] In addition, since the tubular base material 2 supports the airbag 3 from the inside when the airbag 3 inflates, while maintaining its approximately cylindrical shape with almost no elastic deformation, the airbag 3 can be inflated stably and the opening of the gap between the sewer pipe A and the rehabilitation pipe B can be reliably sealed, compared to when the tubular base material 2 is flexible and there is a risk that the tubular base material 2 will bend and change shape.

[0035] Next, the filler C is poured into the gap between the sewer pipe A and the rehabilitating pipe B. The protective sheet 5 prevents the filler C from flowing out of the gap between the sewer pipe A and the rehabilitating pipe B into the rehabilitating pipe B or the branch pipe D, and also prevents the sewage flowing down the rehabilitating pipe B or the branch pipe D from mixing with the filler C.

[0036] Then, when the filler C is filled into the gap between the sewer pipe A and the rehabilitated pipe B and hardens, the compressed air in the airbag 3 is discharged to deflate the airbag 3. When the blocking device 1 is removed from the junction port E and the communication port F, the sewer pipe A and the rehabilitated pipe B are integrated with the junction port E and the communication port F secured, and the sewer pipe A can be earthquake-proof reinforced.

[0037] In this way, the blocking device 1 of this embodiment is a blocking device 1 that can be inserted into the junction E of the branch pipe D and the communication port F of the rehabilitated pipe B, and is configured to include a cylindrical base material 2 having a drainage channel 23 formed therein that can connect the branch pipe D and the rehabilitated pipe B, an airbag 3 that is provided around the cylindrical base material 2 and can be inflated and deflated freely, an over-inflation control sheet 4 that is attached to the airbag 3 and controls over-inflation of the airbag 3, and a protective sheet 5 that is provided on the outer surface of the over-inflation control sheet 4 and can block the opening of the gap between the sewer pipe A and the rehabilitated pipe B.

[0038] According to this configuration, the airbag 3 inflates and the protective sheet 5 blocks the opening of the gap between the sewer pipe A and the rehabilitated pipe B, and the rehabilitated pipe B and the branch pipe D are connected via the drainage channel 23. This means that even when the rehabilitated pipe B is constructed, the sewage flowing down in the branch pipe D can be drained into the rehabilitated pipe B, and the filler C filled in the gap between the sewer pipe A and the rehabilitated pipe B can be prevented from flowing into the rehabilitated pipe B or the branch pipe D, and the sewage flowing down in the rehabilitated pipe B or the branch pipe D can be prevented from mixing with the filler C.

[0039] In addition, a blocking method for blocking the opening of the gap between the sewer pipe A and the rehabilitated pipe B using the blocking device 1 of this embodiment includes a step of placing the blocking device 1 at the communication port F and the junction port E from the rehabilitated pipe B side, and a step of inflating the airbag 3 so that the protective sheet 5 blocks the opening of the gap between the sewer pipe A and the rehabilitated pipe B.

[0040] According to this configuration, the blocking device 1 is placed at the junction port E and the communication port F from the rehabilitated pipe B side, the airbag 3 is inflated and the protective sheet 5 blocks the opening of the gap between the sewer pipe A and the rehabilitated pipe B, and the rehabilitated pipe B and the branch pipe D are connected via the drainage channel 23. Therefore, even when the rehabilitated pipe B is constructed, the sewage flowing down in the branch pipe D can be drained into the rehabilitated pipe B, and the filling material C filled in the gap between the sewer pipe A and the rehabilitated pipe B can be prevented from flowing into the rehabilitated pipe B or the branch pipe D, and the sewage flowing down in the rehabilitated pipe B or the branch pipe D can be prevented from mixing with the filling material C.

[0041] Furthermore, in addition to the above description, the present invention can be modified in various ways without departing from the spirit of the present invention, and it is natural that the present invention extends to such modifications.

[0042] The fluid flowing through the fluid pipe is not limited to the sewage mentioned above, but may be clean water or the like. [Explanation of symbols]

[0043] 1: Occlusion device 2: Cylindrical substrate 21:Inlet 22: Outlet 23:Drainage channel 24:Communication hole 25: Crimping 3: Airbag 31: Air hose 4: Over-inflation control sheet 5: Protective sheet

Claims

[Claim 1] A method for blocking an opening of a gap between a fluid pipe and a rehabilitation pipe by using a blocking device that can be inserted into a junction opening of a branch pipe that joins the fluid pipe and a communication opening that is drilled in a rehabilitation pipe constructed within the fluid pipe and corresponds to the junction opening, comprising: The occlusion device comprises: A cylindrical base material having a drainage channel formed therein that can connect the branch pipe and the rehabilitation pipe; an airbag provided around the cylindrical base material and capable of expanding and contracting; an over-inflation restriction sheet that is attached to the exterior of the airbag and restricts over-inflation of the airbag; a protective sheet provided on an outer peripheral surface of the over-expansion restricting sheet and capable of closing an opening of a gap between the fluid pipe and the rehabilitation pipe; Equipped with When the airbag inflates, the cylindrical base material supports the airbag from the inside without elastically deforming, arranging the blocking device at the communication port and the junction port from the rehabilitation pipe side; inflating the airbag so that the protective sheet closes the opening of the gap between the fluid pipe and the rehabilitation pipe; A method of obstruction comprising:

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