JP3566659B2 - Cap for reversing pipe lining material and method for reversing pipe lining material - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for inverting and inserting a pipe lining material into a pipe line and lining the inner peripheral surface of the pipe line with the pipe lining material, and in particular, inverting and inserting a pipe lining material applied to a large-diameter pipe line. The present invention relates to a pipe lining material reversing die suitable for use in the present invention and a method for reversing the same.
[0002]
[Prior art]
When sewer pipes and other pipes buried underground become obsolete, a method of forming a hard coating on the inner peripheral surface of the pipes without excavating them and repairing them is already known and put to practical use. .
[0003]
This type of pipe lining method uses a pipe lining material made by impregnating a thermosetting resin into a resin absorbent such as a nonwoven fabric whose surface is film-coated, and uses the pipe lining material with fluid pressure such as water or air. The thermosetting resin impregnated in the pipe lining material is cured by, for example, replacing the fluid with warm water while pressing it against the inner peripheral surface of the pipe with fluid pressure. A hard coating made of a pipe lining material is formed on the inner peripheral surface of the pipe.
[0004]
Here, in this type of pipe lining method, a base (reversing nozzle) for connecting one end of the pipe lining material is used for reversing the pipe lining material, and the base is installed inside a manhole and when installed outside. There is.
[0005]
FIG. 14 shows an example in which a base is installed in a manhole. In this case, for example, an L-shaped bent bend N1 (vent pipe, elbow) is used. As shown in the figure, one end of the bend N1 is connected to one end of a pipe lining material L in a state of being folded outward, and the other end is connected to a guide tube T made of a nonwoven fabric or the like. Then, in a state where the connection side of the pipe lining material L is directed toward the inlet of the pipe K to be repaired, for example, water is injected as a fluid into the guide tube T pulled out from the manhole H to the ground, and the water pressure of the pipe lining material L Is introduced into the pipeline K while being inverted.
[0006]
According to this kind of construction method, the length of the pipe for repairing the pipe lining material can be almost the same as the length of the pipe to be repaired, but it can be used without waste. Since (Bend N1) cannot be introduced into the manhole, the repair of the pipeline by this method was limited to small and medium diameter ones.
[0007]
Therefore, when repairing a pipeline having a large diameter (for example, a manhole having an inlet diameter of 600 mm and a diameter of 400 mm or more), a method as shown in FIG. 15 is applied. In the figure, N2 is a cylindrical base, and this base N2 is supported by a gantry F provided on a manhole H. As shown in the drawing, one end of the pipe lining material L is connected to the outer periphery of one end of the base N2 by being folded back. In this state, the pipe lining material L is inverted by pouring water into the base N2. In addition, it can be introduced into the pipe K through the manhole.
[0008]
[Problems to be solved by the invention]
However, according to the above-described method applied to repair of a large-diameter pipe, the inverted end of the pipe lining material drooping from the ground into the manhole is changed in the manhole. I have to do it.
[0009]
For example, as shown in FIG. 16, an inclined table S is installed at the bottom of the manhole, or a wire rope W is previously connected to the inverted end of the pipe lining material L as shown in FIG. A method has been proposed in which the inverted end of the pipe lining material L is directed toward the inlet of the pipe K by winding it up (JP-A-1-198326). However, the method shown in FIG. Since the pipe lining material L placed on S is partially crushed and deformed, the pipe lining material L cannot be properly guided into the pipe K.
[0010]
On the other hand, in the method shown in FIG. 17, a wire rope must be connected to every pipe lining material to be used each time, and there is a risk that the connection portion is torn and the inversion fluid leaks. In particular, in the method shown in FIG. 17, the inverted end of the pipe lining material receives the fluid pressure therein and is crushed at the bottom of the manhole as shown in FIG. Even if an attempt is made to convert, as shown in FIG. 19, a portion near the inlet of the pipe K is first introduced into the pipe K, and it is extremely difficult to properly guide the whole into the pipe K.
[0011]
For this reason, an invention was proposed in which a pipe lining material was guided into a pipe through a flexible tube processed into a bend shape, and the application was filed as Japanese Patent Application No. 11-52569. Not obtained.
[0012]
In addition, as long as the pipe lining material is inserted from the ground upside down into the pipe, the pipe lining material is hardened in the section from the base base N2 to the inlet of the pipe K after the hardening of the pipe lining material by any of the above methods. However, there is still a problem that the material is wasted because the material is cut off.
[0013]
Therefore, Japanese Unexamined Patent Publication No. 7-205291 proposes a base N3 (reversing nozzle) as shown in FIG. The base N3 is a type that is installed in a manhole and is a straight tube, not a bend, and its length is generally set to be smaller than twice the diameter. When connected to the ground, the connecting portion of the guide tube T extending toward the ground is bent inward to form a folded piece t, and as a result, the flow of the reversing fluid is impaired and the pipe lining material is placed in the pipeline. However, there is a problem that a pressure sufficient for reverse insertion cannot be obtained.
[0014]
The present invention has been made in view of the above circumstances, and an object of the present invention is to enable even a large-diameter pipe lining material to be smoothly and reversely inserted into a pipe without waste.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cylindrical base to which one end of a pipe lining material is connected by being folded back at one end thereof, and a flanged connection surface forming an angle of 30 to 50 degrees with respect to the end surface. It consists of a pair of hollow divided bodies that are connected in a straight shape with having, and it is possible to switch to a straight shape and a bend shape by rotating both hollow divided bodies relatively half a rotation along the coupling surface. The present invention provides a base for reversing a pipe lining material. In particular, in the base, an annular sealing material is interposed between the coupling surfaces.
[0016]
Further, as another aspect, the present invention provides a cylindrical base which is connected to one end of the outer periphery of the tube lining material in a state where one end of the tube lining is folded outward, the both ends of which are formed of a rigid tube having rigidity, and an intermediate portion thereof. Can be bent at 90 degrees from the straight state, and a tube lining material formed of a flexible tube such as a bellows such that the inner radius of curvature R when bent at 90 degrees becomes 0 <R ≦ D with respect to the diameter D. To provide a reversing base.
[0017]
On the other hand, the present invention relates to a method of inverting a pipe lining material into a pipe, wherein a cylindrical base is connected to one end of the pipe in a state where one end of the pipe lining material is folded outwardly, and the end face thereof is 30 A pair of hollow divided bodies that are connected in a straight shape with a flanged coupling surface forming an angle of up to 50 degrees, and that both hollow divided bodies are relatively half-turned along the coupling surface. By using a base that can be changed into a straight shape and a bend shape, a pair of hollow divided bodies are connected in a straight shape, and a pipe lining material is passed through the inside, and one end of this tube lining material is turned outward. After connecting one end of the base to one end of the base and connecting one end of a flexible tubular guide tube to the outer periphery of the other end of the base and introducing the base into the manhole, the pair of hollow divided bodies is bent. Change to Towards the connecting portion of the tubular liner to the inlet of the conduit, so that inverted insertion of the tube lining material into conduit by the action of the fluid pressure inside the pipe liner bag in this state.
[0018]
As another method, a cylindrical base is connected to one end of the outer periphery of the tube lining material in a state where one end of the tube lining material is folded outward, the both ends of which are formed of a rigid tube having rigidity, and the middle of which is in a straight state. And a flexible tube such as a bellows such that the inner radius of curvature R when bent at 90 degrees with respect to the diameter D satisfies 0 <R ≦ D. The pipe lining material is passed through, one end of the pipe lining material is turned outward and connected to the outer circumference of one end of the base, and one end of a flexible tubular guide tube is connected to the outer circumference of the other end of the base. After the base is straightened and introduced into the manhole, the base is bent into a bend so that the connection portion of the pipe lining material is directed to the inlet of the pipe, and in this state, fluid pressure is applied to the inside of the pipe lining material. By So that inverted insertion into the lining material conduit.
[0019]
In the above method, a wire such as a wire rope is previously connected to the outer periphery of one of the hard pipes to which the pipe lining material is connected, and after the cap is introduced into the manhole, the wire is pulled from the ground to bend the cap. It is good to do so.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. First, in FIG. 1, 1 is a manhole, 2 is a pipeline such as a sewer connected to the bottom of the manhole 1, 3 is a pipe lining material for lining (lining) the pipeline 2, and this pipe lining material 3 is As is well known, a tubular resin absorbent formed of non-woven fabric such as polyester or the like is used as a support, and impregnated with a thermosetting resin such as epoxy resin or unsaturated polyester, and its outer peripheral surface or both inner and outer peripheral surfaces are covered. It is formed by coating with a plastic film such as polyethylene or polyurethane.
[0021]
The pipe lining material 3 is folded into a belt shape before use and is kept cool. When used, the pipe lining material 3 is inverted and inserted into the pipe line 2 by fluid pressure as described later. One end in the longitudinal direction is opened as a connecting portion, and the other end is closed so that fluid does not leak.
[0022]
On the other hand, reference numeral 4 denotes a cylindrical base used for inserting the pipe lining material 3 upside down into the pipe line 2, and is connected to the outer periphery of one end of the pipe lining material 3 in such a manner that one open end of the pipe lining material 3 is folded outward. The other end is connected to one end of a flexible tubular guide tube 5 such as a non-woven fabric whose surface is coated with a film. A cylindrical fitting 6 having a flange 6A on the outer periphery is attached to one end on the upper side of the guide tube 5. From the fitting 6, one end on the closed side of the pipe lining material 3 having one end connected to the base 4 is used as a guide. It is pulled out through the inside of the tube 5.
[0023]
In particular, the base 4 according to the present invention is constituted by a pair of hollow hollow bodies 4A and 4B having a cylindrical shape as shown in FIG. 2, and the hollow hollow bodies 4A and 4B have corresponding coupling surfaces 7 and correspond to each other. It is removable. In this example, the pair of hollow divided bodies 4A and 4B divide an integral cylindrical metal pipe having a straight shape into two in the axial direction, and form annular flanges 7A and 7B along the outer peripheral opening edge of the cut end. The coupling surfaces 7 are in close contact with each other via an annular sealing material 8 made of rubber or the like.
[0024]
As is clear from FIG. 3, the coupling surface 7 is inclined with respect to the end surfaces 9, 9 orthogonal to the peripheral surfaces of the hollow divided bodies 4A, 4B. 7 are set to 45 degrees. Then, the base 4 makes the two hollow divided bodies 4A, 4B relatively half-turn along the coupling surface 7 to make them straight and bend-shaped (90 degrees in this example) as shown in FIG. And can be connected closely. In the present embodiment, the coupling surface 7 is fastened by bolts and nuts. For this reason, through holes 10 for passing bolts are opposed to the flanges 7A and 7B forming the coupling surface 7 as shown in FIG. However, instead of such a coupling method, the coupling surface 7 may be fastened with a giant vice or the like. Further, it is preferable to provide a supporting projection 11 on one of the hollow divided bodies 4A to which the pipe lining material is connected so that the hollow divided body 4A can be stably disposed at the bottom of the manhole when it is connected at 90 degrees (see FIG. 3). ).
[0025]
According to the base 4 configured as described above, the pair of hollow divided bodies 4A and 4B can be connected straight and introduced into the manhole 1 as shown in FIG. After the introduction into the inside, the pair of hollow divided bodies 4A and 4B can be joined at 90 degrees as shown in FIG. 6 so that the connection portion of the pipe lining material 3 can face the inlet of the pipe line 2. In this connection, the inlet aperture d1 manhole 1 is smaller than the diameter d2 of its interior, typically _d 1 = 600 _mm, since it is d 2 = 900 mm, in order to introduce the cap 4 straight shape in the manhole 1, The outer diameter of the hollow divided bodies 4A and 4B must be smaller than 600 mm including the protrusion amount of the flanges 7A and 7B, and the base tube 5 can be raised straight from the manhole 1 toward the ground. 4. it is preferred that the entire width X in the bend shape set d _2/2 (450mm) than decreases as the present invention does not a requirement its dimensions.
[0026]
In order to reversely insert a pipe lining material into a pipe using the above-described base 4, a pair of hollow divided bodies 4A and 4B are connected (temporarily fixed) in a straight shape as shown in FIG. The tube lining material 3 is passed through the inside, and one end on the open side is turned outward and fastened to the outer periphery of one end of the base 4 (opening edge of the hollow split body 4A) with a band 12, while the tube lining material 3 is closed on the closed side. While passing one end into the guide tube 5, one end of the guide tube 5 is fastened to the outer periphery of the other end of the base 4 (opening edge of the hollow divided body 4B) by the band 13. A cylindrical fitting 6 is attached to the other end of the guide tube 5, and a hot water hose 14 is connected in advance to a closed end of the pipe lining material 3 extending from the fitting 6.
[0027]
Then, as shown in FIG. 1, the metal fittings 6 are horizontally supported at a portion of the gantry 15 temporarily provided on the manhole 1, while the base 4 is lowered from the ground to the bottom of the manhole 1 while keeping the base 4 straight. The hollow divided bodies 4A and 4B are changed to form a 90-degree bend in the inside, and the connecting portion of the pipe lining material 3 is directed to the inlet of the pipe 2.
[0028]
Thereafter, water is injected into the guide tube 5 from the ground and supplied to the inside of the base 4 through the guide tube 5, whereby the pipe lining material 3 receives the water pressure and receives the water pressure as shown in FIG. The hot water hose 14, which is inserted into the pipe 2 while being inverted, is also drawn into the pipe 2 while crawling inside the pipe lining material 3. Then, when the inversion of the pipe lining material 3 is completed, the hot water hose 14 is connected from the ground to the inversion end of the pipe lining material 3. At this time, the pipe lining material 3 is firmly adhered to the inner peripheral surface of the pipe line 2 while receiving a large water pressure. Preferably, the internal pressure of the pipe lining material 3 is further increased by using air pressure together. . Specifically, as shown in FIG. 8, a pressure lid 16 having a hot water hose 14 penetrated is attached to an upper opening of the metal fitting 6 to form a closed space Q on the water surface in the guide tube 5. Compressed air is supplied from the compressor C through the pressure lid 16 into Q, whereby the pipe lining material 3 is strongly pressed against the inner peripheral surface of the pipe line 2 by water pressure and air pressure.
[0029]
Therefore, while maintaining that state, hot water is supplied to the inside of the lining material 3 through the hot water hose 14. At this time, the pressure of the hot water flowing out from the tip of the hot water hose 14 and the water filling the pipe lining material 3 The water in the pipe lining material 3 is sent to the boiler B through the drain pipe 17 penetrating the pressure lid 16 by the pressure of the air in the closed space Q, and is heated by the boiler B. Is resent from the pump P to the inside of the pipe lining material 3 through the hot water hose 14. Then, the lining material 3 is heated by the circulating warm water, and the thermosetting resin impregnated in the lining material 3 is cured, whereby a hard coating of the pipe lining material 3 is formed on the inner peripheral surface of the pipe 2.
[0030]
As described above, a preferred example of the present invention has been described, but the die according to the present invention is not limited to the above configuration, and the angle θ formed by the coupling surface 7 with respect to the end surface 9 of the die 4 is in the range of 30 to 50 degrees. May be changed.
[0031]
FIG. 9 shows an example in which the angle θ is set to 30 degrees. In this example, the pair of hollow divided bodies 4A and 4B can be switched between a straight shape and a 120-degree bend shape. FIG. 10 shows an example in which the angle θ is set to 50 degrees. In this example, the pair of hollow divided bodies 4A and 4B can be changed into a straight shape and an 80-degree bend shape. As shown in FIGS. 9 and 10, one hollow split body 4A to which the pipe lining material is connected is provided with a supporting projection 11 as in the above example, and the other hollow split body to which a guide tube is connected. A drain port 18 for connecting a drain pipe 17 (see FIG. 8) to 4B may be formed.
[0032]
Next, FIG. 11 shows a modified example of the base according to the present invention. The base 24 has rigid rigid cylindrical tubes 24A and 24B at both ends, such as steel tubes, and an intermediate portion connecting the rigid tubes 24A and 24B can be bent 90 degrees from a straight state while maintaining a cylindrical shape. Flexible tube 24C. In this example, the flexible tube 24C is formed of a cylindrical bellows (bellows tube) formed by corrugating non-woven fabric or synthetic resin having heat resistance, and includes a tube in which a spiral metal winding is incorporated as a shape-retaining material. And metal flexible tubes.
[0033]
However, in consideration of the use in the manhole, the flexible tube 24C has a curvature radius R on the inner side (smaller curvature side) with respect to the diameter D when the tube is bent to 90 degrees {0 <R ≦ D}. Is selected (see FIG. 12).
[0034]
According to this type of base 24, after it is introduced into the manhole 1 in a straight shape as shown in FIG. 13, the flexible tube 24C is bent at 90 degrees to connect the connecting portion of the tube lining material 3 to the line. You can turn to the entrance. The tube lining material 3 is connected to the outer periphery of one end of the hard tube 24A with one end thereof turned outward, and the guide tube 5 is connected to the other hard tube 24B. It is preferable to provide a connection portion 26 for connecting a conductive wire 25 such as a wire rope to one of the hard tubes 24A so that the wire 25 can be bent, and to provide a wire portion 27 such as a pulley for passing the conductive wire 25 to the other hard tube 24B. According to this, the conductor 25 can be pulled up from the ground without disposing an operator in the manhole 1, and the flexible tube 24C can be bent at 90 degrees as shown in FIG. In particular, since the base 24 as in this example is set at 90 degrees and the fold t as shown in FIG. 20 is not formed, a fluid for inverting the pipe lining material can be smoothly guided into the pipe lining material.
[0035]
【The invention's effect】
As is clear from the above description, according to the pipe lining material reversing die according to the present invention, even when lining a large-diameter pipe, the pipe lining material applied to the pipe is introduced into the manhole while being connected. In addition, the pipe lining material can be smoothly guided into the pipe in the manhole with the connecting portion of the pipe lining facing the entrance of the pipe.
[0036]
In particular, since the base retains a cylindrical shape and bends in the manhole, the reversing fluid is not blocked inside the base, and the pressure works well on the pipe lining material. In addition to smooth insertion of the pipe lining material, the pipe lining material can be hardened while being strongly adhered to the inner peripheral surface of the pipe to form a good-quality lining.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state in which a base according to the present invention is installed in a manhole. FIG. 2 is a perspective schematic view showing a mode in which the base is bent at 90 degrees. FIG. FIG. 4 is a schematic perspective view showing a hollow divided body constituting the base. FIG. 5 is a schematic view showing a state in which the base is introduced into a manhole. FIG. FIG. 7 is a cross-sectional view showing a state in which a pipe lining material is connected to the base. FIG. 8 is a state in which the pipe lining material is inverted and inserted into a pipe using the base. FIG. 9 is a schematic side view showing another embodiment of the die according to the present invention. FIG. 10 is a schematic side view showing another embodiment of the die according to the present invention. FIG. 12 is a side view showing a modified example of the base. FIG. 12 is a schematic sectional view of the base shown in FIG. 11. FIG. 13 is a schematic view showing a state in which the base shown in FIG. 11 is introduced into a pipeline. FIG. 14 is a schematic view showing a conventional pipe lining method using a base. FIG. 15 is a schematic view showing a conventional pipe lining method using a base. FIG. 16 is a schematic view showing an example of guiding a pipe lining material into a pipe by the method of FIG. 15. FIG. 17 is a schematic view showing an example of guiding a pipe lining material into a pipe by the method of FIG. FIG. 18 is a schematic view showing the state of the pipe lining material that has reached the bottom of the manhole in the method of FIG. 15; FIG. 19 is a schematic view showing the state when the inverted end of the pipe lining material is bent from the state of FIG. FIG. 20 is a schematic cross-sectional view showing a use state of a conventional base.
DESCRIPTION OF SYMBOLS 1 Manhole 2 Pipe line 3 Pipe lining material 4, 24 Cap 4A, 4B Hollow divided body 5 Guide tube 7 Coupling surface 7A, 7B Flange 8 Seal material 9 Cap end face 18 Drainage ports 24A, 24B Hard pipe 24C Flexible pipe 25 Conducting wire 26 Connection part 27 Communication part

Claims (5)

A cylindrical base which is connected to the outer periphery of one end with one end of the pipe lining material being folded outward, and having a flanged connecting surface forming an angle of 30 to 50 degrees with respect to the end surface, and having a straight shape. Inversion of the pipe lining material, which is made possible by a pair of hollow divided bodies connected to each other, and the two hollow divided bodies can be switched to a straight shape and a bend shape by making a relative half rotation along the coupling surface. Base. 2. The base for reversing a pipe lining material according to claim 1, wherein an annular sealing material is interposed between the coupling surfaces. One end of the tube lining material is connected to the outer periphery of the tube lining in a state where one end of the tube lining is folded outward, the both ends of which are made of a rigid tube having rigidity, the middle of which can be bent 90 degrees from the straight state. An inversion base for a tube lining material formed of a flexible tube such as a bellows such that an inner radius of curvature R when bent to 90 degrees with respect to the diameter D is 0 <R ≦ D. A cylindrical base which is connected to the outer periphery of one end with one end of the pipe lining material being folded outward, and having a flanged connecting surface forming an angle of 30 to 50 degrees with respect to the end surface, and having a straight shape. A pair of hollow divided bodies connected to the, using a base that can be switched to a straight shape and a bend shape by relatively rotating both hollow divided bodies along the coupling surface by a half turn, A pipe lining material is passed through the inside of the hollow divided body in a state of being connected straight, and one end of the pipe lining material is turned outward to be connected to the outer circumference of one end of the base and to the outer circumference of the other end of the base. After connecting one end of a flexible tubular guide tube and introducing the base into the manhole, the pair of hollow split bodies are changed into bends so that the connection portion of the pipe lining material is directed toward the inlet of the pipe line, That state In reversal process of the pipe lining material, characterized by inverting inserting the tube lining material into conduit by the action of the fluid pressure inside the pipe liner bag. One end of the tube lining material is connected to the outer periphery of the tube lining in a state where one end of the tube lining is folded outward, the both ends of which are made of a rigid tube having rigidity, the middle of which can be bent 90 degrees from the straight state. Using a flexible tube such as a bellows such that the inner radius of curvature R when bent to 90 degrees with respect to the diameter D satisfies 0 <R ≦ D, and through which the pipe lining material is passed; One end of this tube lining material is turned outward and connected to the outer periphery of one end of the base, and one end of a flexible tubular guide tube is connected to the outer periphery of the other end of the base to straighten the base. After being introduced into the manhole, the base is bent into a bend shape so that the connection portion of the pipe lining material is directed to the inlet of the pipe line, and in this state, the pipe lining material is subjected to a fluid pressure to act on the pipe lining material. tube Inversion method of the pipe lining material, characterized in that inverted insertion within.

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