JP5758184B2 - Method of attaching lid to pipe lining material and expansion device for opening of pipe lining material used therefor - Google Patents

Description

  The present invention relates to a method of attaching a lid to a pipe lining material made of a flexible tube and an expansion device for an opening of the pipe lining material used therefor.

  When the pipe material that constitutes the pipeline such as the sewage pipe buried in the ground becomes obsolete, the lining is applied to the inner peripheral surface without replacing the old pipe material (existing pipe) with a new pipe material. A pipe lining method for repairing a pipe line has been proposed and put into practical use (see, for example, Patent Documents 1 and 2).

  As shown in FIG. 1, this pipe lining method is, for example, a pipe lining material provided with a resin-absorbing fiber layer impregnated with a curable resin such as a flexible tube-like thermosetting resin or ultraviolet curable resin. 1 is inserted into the existing pipe 2 constituting the pipe line, and the pipe lining material 1 is heated against the inner peripheral surface of the existing pipe 2 by increasing the internal pressure of the pipe lining material 1 or irradiated with ultraviolet rays. Thus, the curable resin impregnated in the resin-absorbing fiber layer is cured, and the existing pipe 2 is repaired by lining the inner peripheral surface of the existing pipe 2 with the pipe lining material 1.

JP 2006-264896 A JP 2008-149599 A

By the way, the pipe lining material 1 is inserted into the existing pipe 2 through a manhole (manhole) 3 as shown in FIG. 1 (a). At this time, the pipe lining material 1 is a pipe lining disposed on the ground. After being inserted from the human hole 3 in a sheet-like flat state pressed from the material supply device 11 and laid on the existing pipe 2, as shown in FIG. 1 (b), the opening of the pipe lining material 1 is inserted. The lid 4 is attached and closed. In this state, air is injected into the pipe lining material 1 to increase the internal pressure, and the pipe lining material 1 is heated while being pressed against the inner peripheral surface of the existing pipe 2. By irradiating with ultraviolet rays, the curable resin impregnated in the resin-absorbing fiber layer is cured.
In the example shown in FIG. 1B, the steam generated by the steam generator 12 disposed on the ground is supplied from the lid 4 to the inside of the pipe lining material 1 through the pipe 13, and the pipe lining material is supplied. After the curable resin impregnated in the resin-absorbing fiber layer 1 is heated and cured, the exhaust gas is discharged from the lid body 4 through the pipe 14 to the atmosphere through the exhaust discharge device 15 disposed on the ground. ing.

Thus, in order to inject air or steam into the pipe lining material 1 or to discharge exhaust, the inside of the pipe lining material 1 is closed by attaching and closing the lid 4 to the opening of the pipe lining material 1. However, the operation of attaching the lid 4 to the opening of the pipe lining material 1 usually requires manual operation within the narrow human hole 3, for example, The pipe lining material 1 applied to one having a diameter of 700 mm or more has a weight of 60 kg / m or more, widens the opening of the pipe lining material 1, inserts the lid 4 into the opening, and fastens a band or the like. The work of fixing the outer periphery with a tool has a problem that it is heavy labor, the workability is poor, and the work takes time.
In addition, the workability of inserting the lid 4 into the opening of the pipe lining material 1 while expanding the opening of the pipe lining material 1 is better when the diameter of the lid is smaller than the diameter of the opening. For this reason, a lid having a diameter smaller than the optimum diameter may be used in order to shorten the time required for labor such as manually expanding the opening. However, when the diameter of the lid body 4 is excessively small compared to the diameter of the pipe lining material 1, a large wrinkle is formed on the pipe lining material 1. Not only is it difficult to maintain, but also when the air is injected into the pipe lining material 1, the pipe lining material tends to bulge in the outer peripheral direction of the lid, and the metal fitting for fixing the lid is released after this bulge is cured. There was a problem that the work was hindered and a long time was required for the work.

  In view of the problems of the above-described conventional pipe lining construction method, the present invention provides a pipe lining material that can be easily attached to the pipe lining material without burdening the operator. It is an object of the present invention to provide a method for attaching a lid and an expansion device for an opening of a pipe lining material used therefor.

  In order to achieve the above object, the method of attaching a lid to a pipe lining material of the present invention is a method of attaching a lid to an opening of a pipe lining material made of a flexible tube, After inserting the expansion body from the opening of the lining material and expanding the expansion body by injecting fluid into the expansion body to expand the opening of the pipe lining material, and attaching a lid to the opening, By discharging the fluid inside the expansion body, the expansion body is contracted to take out the expansion body.

Moreover, the expansion device of the opening part of the pipe lining material of this invention used for the said method is the opening part of the pipe lining material used when attaching a cover body to the opening part of the pipe lining material which consists of a flexible tube. a expansion device, an expansion member comprising a bag having a flexible, Ri Do and a fluid injection mechanism for injecting a fluid through the tube to the expansion body, the expansion body, the fluid inside of said expandable body By expanding the expanded body by injecting and expanding the opening of the tube lining material and attaching the lid to the opening, the fluid inside the expanded body is discharged to contract the expanded body so it can be removed from an opening formed in the lid and Rukoto characteristics with.

  According to the method of attaching the lid to the pipe lining material of the present invention and the apparatus for expanding the opening of the pipe lining material used therein, when attaching the lid to the opening of the pipe lining material made of a flexible tube, After the expansion body is inserted through the opening of the pipe lining material and the expansion body is expanded by injecting fluid into the expansion body to expand the opening of the pipe lining material, and the lid is attached to the opening By discharging the fluid inside the expansion body, the expansion body is contracted and the expansion body is taken out, so that the attachment work of the lid to the pipe lining material can be easily performed without placing a burden on the operator. Moreover, since workability is good, working efficiency can be improved in combination with the fact that a lid having a diameter suitable for the diameter of the pipe lining material can be used.

It is explanatory drawing of a pipe lining construction method, (a) shows the process of laying a pipe lining material in a pipe line, (b) shows the process of heating, pressing a pipe lining material to the internal peripheral surface of a pipe material. An example of a lid is shown, (a) is a front view, (b) is a cross-sectional view, and (c) is a front view of a cylindrical body. An embodiment of the expansion device of the opening part of the pipe lining material of the present invention is shown, (a) is a front view, (b) is a side view, (c) is a front view of a supply and exhaust part of the expansion device, (d ) Is a side view. It is explanatory drawing of the attachment method of the cover body to the pipe lining material of this invention using the expansion apparatus of the opening part of the same pipe lining material.

  Embodiments of a method for attaching a lid to a pipe lining material of the present invention and an apparatus for expanding an opening of a pipe lining material used for the method will be described below with reference to the drawings.

In FIG. 2, an example of the cover body used for the attachment method of the cover body to the pipe lining material of this invention is shown.
In addition, the conventionally used general purpose lid can also be used for the lid.
The lid body 4 is for attaching to the opening of the pipe lining material 1 to maintain the inside of the pipe lining material 1 in an airtight state. The lid body 4 has a diameter smaller than the diameter of the lid body 4. A divided structure having a size capable of being loaded from the opening of the existing human hole 3 is employed.
In addition, the cover body 4 of a present Example is formed in the diameter D at the time of an assembly, 700mm, and length (axial direction) L: 250mm.

Specifically, the lid 4 is divided into a lid plate 41 that constitutes the lid of the lid 4 and a cylinder 42 that constitutes the cylinder of the lid 4.
Furthermore, the cover plate 41 is composed of divided structures 41a and 41b divided into two equal parts.
The cylindrical body 42 is divided in the circumferential direction, and is composed of an upper divided structure 42a and intermediate / lower divided structures 42b and 42c in which the middle and lower parts are divided into two equal parts.

Each of the lid plate 41 and the cylinder 42 is assembled by dividing the flange portions F1 and F2 formed in the divided structures 41a and 41b and the upper divided structure 42a and the middle / lower divided structures 42b and 42c of the cylinder 42. It is made to join by fastening and fastening with the bolt B as a fixing tool.
In addition, the lid plate 41 and the cylinder 42 are assembled by bringing the lid plate 41 into contact with a flange portion F3 formed on the cylinder 42 and fastening with a bolt B as a fixture.
In addition, a seal structure portion S such as a labyrinth structure portion, packing, seal tape, or the like is disposed on the abutting surface of the flange portions F1 and F2 and the contact surface of the flange portion F3 and the cover plate 41 as necessary. To do.

  In this case, the upper divided structure 42a and the middle / lower divided structures 42b and 42c of the cylindrical body 42 are positioned obliquely above the horizontal plane (in this embodiment, as shown in FIG. 2C). , Θ: 60 °), and the upper divided structure with the bolt B and the cover plate 41 as the fixtures for fixing the upper divided structure 42a and the intermediate / lower divided structures 42b, 42c to each other removed. By applying a pressing force Fo to the body 42a from above, a joint structure that can drop the upper divided structure 42a inside the intermediate / lower divided structures 42b and 42c, specifically, the upper divided structure 42a and The opposing joint surfaces of the flange portions F2 that join the intermediate / lower divided structures 42b and 42c are formed as parallel surfaces (or inclined surfaces that expand on the lower side).

The lid body 4 has a plurality of closable openings for connecting a pipe for supplying steam, discharging exhaust gas and draining drain water to the lid plate 41, or inserting inspection equipment such as a camera. H is provided, and the airtight state is maintained by attaching the lid 4 to the opening of the tube lining material 1 on the outer peripheral surface of the cylindrical body 42 and fastening the outer periphery with a belt-shaped fastener. The protrusions Fr are provided at intervals, and the upper divided structure 42a is provided with a hook Fk for supporting the upper divided structure 42a when the cylindrical body 42 is assembled or disassembled.
In addition, the lid 4 can be appropriately provided with the structure and mechanism provided in the conventional lid.

Next, a method for attaching and removing the lid 4 will be described.
Since the lid 4 has a divided structure that can be loaded from the opening of the existing human hole 3 having a smaller diameter than the diameter of the lid 4, the lid 4 can be loaded from the opening of the existing human hole 3. The pipe lining material 1 is carried into the human hole 3 in a state of being disassembled into the divided structures 41a, 41b, 42a, 42b, and 42c, and assembled and used in the opening device 5 for the pipe lining material 1 described later. Then, the existing pipe 2 is repaired by the pipe lining material 1, the lid body 4 is disassembled into the divided structures 41a, 41b, 42a, 42b, 42c, and the existing human hole 3 is removed. Remove from the opening.
In this case, the lid 4 is assembled by first assembling the cylindrical body 42, attaching the assembled cylindrical body 42 to the opening of the pipe lining material 1, and then assembling the lid plate 41 to form the flange portion formed on the cylindrical body 42. The cover plate 41 is joined to F3.
Thereby, carrying in of the lid 4, attachment / detachment to / from the pipe lining material 1, and unloading work can be easily performed without placing a burden on the operator, and an existing diameter smaller than the diameter of the lid 4 is provided. Since it can also be applied to the human hole 3, problems related to workability and maintenance of an airtight state, etc., when using the cover 4 having a small diameter that does not match the pipe lining material 1 can be solved.

In particular, the cylindrical body 42 of the lid 4 is composed of an upper divided structure 42a and intermediate / lower divided structures 42b, 42c, and the upper divided structure 42a and the intermediate / lower divided structures 42b, 42c are mutually connected. The upper divided structure 42a of the cylindrical body 42 is formed by joining the upper divided structure 42a to the inside of the middle / lower divided structures 42b and 42c with the fixing tool (bolt B) removed. And the fixing member (bolt B) for fixing the middle / lower divided structures 42b and 42c to each other is removed, and the upper divided structure 42a is dropped into the middle / lower divided structures 42b and 42c, thereby Decomposition can be performed more easily.
In addition, since the pipe lining material lid 4 can be easily detached from the pipe lining material 1 after curing, the range of applicable pipe lining materials is widened (usually, the pipe lining material lid). It can be applied to the pipe lining material 1 in the range of ± 5% of the diameter D of the body 4.) It can have versatility.

The method of dividing the lid 4 is not limited to the present embodiment as long as the lid 4 can be divided into a size that can be loaded from the opening of the existing human hole 3 having a smaller diameter than the lid 4. For example, if the diameter of the cover plate 41 can be made smaller than the diameter of the opening of the human hole 3 by projecting the flange portion F3 formed in the cylindrical body 42 largely toward the center side, the cover plate is not necessarily limited. 41 need not have a split structure.
Moreover, it replaced with the structure which divides the cover body 4 into the cover plate 41 and the cylinder 42, and was equipped with the division structure which divided | segmented the whole cover body 4 in the circumferential direction, ie, a cover part and a cylinder part. A divided structure (not shown) can also be used.

Next, FIG. 3 shows an embodiment of the expansion device for the opening of the pipe lining material used when attaching the lid 4 to the opening of the pipe lining material 1.
The expansion device 5 for the opening portion of the pipe lining material includes an expansion body 51 formed of a flexible bag body, and a tube 52 connected to the expansion body 51 and a supply / exhaust portion 51a formed in the expansion body 51. The fluid injection mechanism 53 injects fluid such as air or water.
For the fluid injection mechanism 53, a pressure gas source such as a compressor or a pressure cylinder can be suitably used.

The expanded body 51 is inserted through the opening of the pipe lining material 1 in a folded state, and is expanded by injecting fluid into the interior to expand the opening of the pipe lining material 1 so that the lid 4 can be easily attached to the opening. Then, after attaching the lid 4, a flexible material such as rubber, synthetic resin, composite material or the like so that it can be taken out from the opening of the pipe lining material 1 by discharging the internal fluid. Thus, it is formed so as to be spherical, cylindrical, or the like when expanded.
In addition, it is preferable to use the rubber | gum which can prevent the shift | offset | difference with respect to the pipe lining material 1 at the time of expansion as the material of the expansion body 51. FIG.

In this case, as shown in FIG. 4, the expansion body 51 has a dimension obtained by adding the length (axial direction) L of the lid body 4 so that the lid body 4 can be attached to the opening of the pipe lining material 1. In the state inserted from the opening of the pipe lining material 1, it is necessary to expand by injecting fluid into the inside.
At this time, the expansion body 51 is formed into a spherical shape (FIG. 4 (b)) or a truncated cone shape (FIG. 4 (c)) when expanded, thereby inserting the tube lining material 1 from the opening. The distance (insertion distance at the center position of the expansion body 51: L + α) can be reduced, and the insertion operation can be facilitated.
Further, by attaching the expansion body 51 to the tip of an operation rod (not shown; it can also serve as the air supply / exhaust portion 51a of the expansion body 51), the insertion work can be made easier.

Hereinafter, a more specific example of the expansion body 51 is shown.
・ Pipe lining material 1
It consists of a cylindrical material having a diameter of 700 mm, a thickness of 18 mm, and a weight of 60 kg / m, which is laminated in the order of nylon / polyethylene multilayer film, polyester fiber, glass fiber, and nylon / polyethylene multilayer film.
In addition, in order for a person to expand the opening part of the pipe lining material 1, the load of the grade which lifts the weight of 30 kg (300N) is applied.
・ Extended body 51
When a 1.2 mm-thick material made of chloroprene rubber containing nylon fiber is bonded and expanded, it is formed into a spherical shape having a diameter of about 700 mm.
In addition, the dimension at the time of shrinkage | contraction can be made into about 250 mm by folding, and a proof pressure is 107 kPa (calculated value).
Further, by applying a lubricant such as talc powder to the surface of the expansion body 51, the insertion from the opening of the pipe lining material 1 can be facilitated.
-Fluid injection mechanism 53
20 kPa (maximum 30 kPa)

Next, a method of attaching the lid 4 to the pipe lining material 1 using the expansion device 5 for the opening of the pipe lining material will be described.
When attaching the lid 4 to the opening of the pipe lining material 1, the expansion body 51 of the expansion device 5 is inserted from the opening of the pipe lining material 1, and the fluid injection mechanism 53 passes through the tube 52 into the expansion body 51. The expansion body 51 is expanded by injecting a fluid such as air to expand the opening of the pipe lining material 1, and the lid 4 (in this embodiment, the cylinder 42 of the lid 4) is attached to the opening. Thereafter, the fluid in the expansion body 51 is discharged to contract the expansion body 51 and the expansion body 51 is attached to the lid body 4 (in this embodiment, the cylinder body 42 of the lid body 4. The lid plate 41 and the cylinder When the body 42 is an integral lid body 4, the body 42 is taken out through an opening H formed in the lid plate 41.
In this embodiment, after the expansion body 51 is taken out, the assembled cover plate 41 is joined to the flange portion F3 formed in the cylindrical body 42.
As a result, the attachment work of the lid 4 to the pipe lining material 1 can be easily performed without placing a burden on the operator, and since the workability is good, the diameter of the pipe lining material 1 is adapted to the diameter. Combined with the fact that the lid 4 can be used (in consideration of workability, it is not necessary to use the lid 4 having a diameter that is excessively smaller than the diameter of the pipe lining material 1). Can be improved.

  As mentioned above, although the attachment method of the cover body to the pipe lining material of this invention and the expansion apparatus of the opening part of the pipe lining material used for it were demonstrated based on the Example, this invention is the structure described in the said Example The present invention is not limited to this, and the configuration can be changed as appropriate without departing from the spirit of the invention.

  The method for attaching a lid to a pipe lining material and the apparatus for expanding the opening of the pipe lining material used therefor according to the present invention easily perform the work of attaching the lid to the pipe lining material without burdening the operator. Therefore, it can be suitably applied to a pipe lining method using a large-diameter pipe lining material.

1 Pipe lining material 2 Existing pipe 3 Manhole
4 Lid 41 Lid 41a Divided Structure 41b Divided Structure 42 Tube 42a Upper Divided Structure 42b Middle / Lower Divided Structure 42c Middle / Lower Divided Structure 5 Expansion Device 51 Expanded Body 52 Tube 53 Fluid Injection Mechanism B Bolt (Fixture)
F1 Flange part F2 Flange part F3 Flange part S Seal structure part

Claims (2)

  A lid attachment method for attaching a lid to an opening of a tube lining material made of a flexible tube, wherein the expansion body is inserted from the opening of the tube lining material, and a fluid is injected into the expansion body. The expansion body is expanded to expand the opening of the pipe lining material, and after the lid is attached to the opening, the expansion body is contracted by discharging the fluid inside the expansion body, and the expansion body is taken out. A method of attaching a lid to a pipe lining material characterized by the above. An expansion device for an opening of a pipe lining material used when attaching a lid to an opening of a tube lining material made of a flexible tube, the expansion body made of a flexible bag, and the expansion body Ri Do and a fluid injection mechanism for injecting a fluid through the tube, expansion body, opening to expand the opening of the pipe liner bag by expanding the expandable body by injecting a fluid into the interior of the expandable body after so mounting the lid in part, and Rukoto characteristics and can be taken out from the opening formed in the lid by deflating by discharging expandable body inside the fluid of the expandable body Expansion device for the opening of pipe lining material.

Images