JP2004125127A - Heating shaping apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating shaping apparatus suitable for forming a collar turning section at the end of a regenerating pipe and press bonding a water stopping member on the inner surface of a pipeline in the lining regenerating work of an existing pipeline. <P>SOLUTION: The heating shaping apparatus 20 comprises a truck section 21 that automatically travels in the pipeline or travels by guidance; and a heating oppression section 22 that is retained so that it can be elevated freely to the truck section 21. The heating oppression section 22 has an expansion section 27 that expands nearly in a cylindrical surface shape with an upper surface as a projection by air pressure injected inside, and a heater 33 for heating air is provided in the heating oppression section 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rehabilitation work for lining an existing pipe buried underground by a rehabilitation pipe, by pressing a sheet-like water blocking member on the inner surface of the existing pipe, or from a mounting pipe connected to the existing pipe into the existing pipe. The present invention relates to a heating and shaping apparatus suitable for an operation of forming a flange turn-back portion at an end of a protruding rehabilitation pipe.
[0002]
[Prior art]
Generally, when a pipeline for sewage or the like buried underground is deteriorated, the inside of the pipeline is lined with a rehabilitation pipe made of resin to reinforce the pipeline. In such a lining operation, it is particularly important to reliably stop water around a portion (attachment pipe port) where the attachment pipe (branch pipe) is connected to the existing main pipe. Therefore, the present applicant has developed a technique as shown in FIGS. 6 to 14 as a method for lining the periphery of the mounting pipe opening, and has applied for a patent prior to the present application (for example, Japanese Patent Application No. 2002-115194). . The outline is described below.
[0003]
This lining method includes at least (1) a step of inserting a rehabilitation pipe into a mounting pipe, (2) a step of expanding the diameter of the rehabilitation pipe in the mounting pipe, and (3) turning back an end of the rehabilitation pipe from the main pipe side. Process.
[0004]
<(1) Step of inserting rehabilitation pipe into mounting pipe>
FIG. 6 shows an example of the rehabilitation pipe 1. The rehabilitation pipe 1 is made of, for example, a thermoplastic resin in which a thermoplastic elastomer or the like is blended with vinyl chloride, and has a fold-like portion 1a extending along the axial direction on its outer surface, and is contracted in the radial direction. The rehabilitation pipe 1 has a performance of recovering a cylindrical shape by being heated to a predetermined temperature (for example, about 80 ° C.).
[0005]
The rehabilitation pipe 1 is inserted into the mounting pipe 8 from the ground. When inserting the rehabilitation pipe 1, first, the tip of the rehabilitation pipe 1 is closed so as to be squeezed by the dropping plug 4, and the wire 5 is connected to the dropping plug 4. Then, as shown in FIG. 7, the rehabilitation pipe 1 is unwound into the mounting pipe 8 from the winding machine 7 installed near the ground surface on the side of the basin 6, and the wire 5 connected to the drawing plug 4 is connected to the main pipe 2 and the human hole. 9 through a winch 10. Reference numerals 11 and 12 are pulleys that change the trajectory of the wire 5 and are installed on the inner bottom surface of the main pipe 2.
[0006]
<(2) Step of expanding the rehabilitation pipe inside the mounting pipe>
By the operation of inserting the rehabilitation pipe 1, as shown in FIG. 8, the distal end of the rehabilitation pipe 1 with the lead-in plug 4 reaches from the attachment pipe port 3 to the inside of the main pipe 2. Then, as shown in FIG. 9, the rehabilitation pipe 1 is heated and pressed to expand its diameter. In expanding the diameter, as shown in FIG. 10, the supply end of the rehabilitation pipe 1 is cut, and a socket 13 is attached in an airtight state. An air supply hose 15 and an exhaust hose 16 from a steam generation heater 14 are attached to the socket 13. Connecting. Then, when high-temperature and low-pressure steam is blown from the air supply hose 15, the rehabilitation pipe 1 is softened by the heat of the steam, and as shown in FIGS. It is restored to a body shape. Subsequently, when air at room temperature and high pressure is blown, the rehabilitating pipe 1 is further expanded in diameter by the pressure of the air, and closely adheres to the inner surface of the mounting pipe 8 as shown in FIG. Note that the exhaust hose 16 is for discharging excess steam to the outside of the tube.
[0007]
<3> Step of bridging the end of the rehabilitation pipe from the main pipe side>
Next, as shown in FIG. 12, the tip of the rehabilitation pipe 1 protruding into the main pipe 2 is cut off by a cutting machine 17 carried into the main pipe 2, and the cut end 1 b of the rehabilitation pipe 1 is inserted into the main pipe 2. To open. At this time, the cut end 1b of the rehabilitation pipe 1 is made to slightly protrude into the main pipe 2, so that the protruding portion 1c of the rehabilitation pipe 1 is left in the main pipe 2. Then, as shown in FIG. 13, the cut end 1 b of the protruding portion 1 c is expanded while being heated by the flange return device 18 carried into the main pipe 2, thereby forming a flange-like flange return portion 1 d shown in FIG. 14. Mold. By forming the flange turn-back portion 1d along the inner surface of the main pipe 2 so as to cover the periphery of the mounting pipe opening 3, it is possible to obtain good water stopping even at a connection point between the main pipe 2 and the mounting pipe 8. .
[0008]
[Problems to be solved by the invention]
In the lining work of the mounting pipe opening as described above, when the cut end 1b of the rehabilitating pipe 1 inserted into the mounting pipe 8 is turned back, the cut end 1b is evenly distributed so that the cut end 1b does not crack or buckle. It is necessary to spread it out while heating. Further, even when there are some steps or irregularities in the vicinity of the mounting pipe opening 3, it is necessary to make the flange turn-back portion 1d sufficiently adhere to the inner surface of the main pipe 2 so as not to form a gap or wrinkle. is there. The present invention provides a heating shaping apparatus suitable for pressing and expanding the cut end 1b of the rehabilitating pipe 1 while heating and pressing the inner surface of the main pipe 2 without gaps in such an operation.
[0009]
In addition, in the lining work as described above, in order to enhance the adhesion between the main pipe 2 and the flange turn-back portion 1d, prior to the step of inserting the rehabilitating pipe 1 into the mounting pipe 8, the main pipe 2 is surrounded so as to surround the mounting pipe opening 3. In some cases, a sheet-like water-stopping member may be adhered to the inner surface of No. 2. As such a water stopping member, a combination of a synthetic rubber-based pressure-sensitive adhesive and a hot melt adhesive is suitably used. Also, when attaching such a water-stopping member to the inner surface of the main pipe 2, it is necessary to press the inner surface of the main pipe without any gaps while heating the water-stopping member. Therefore, an object of the present invention is to provide a heating and shaping apparatus that can be suitably used for such operations.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the heating and shaping apparatus of the present invention includes a bogie unit that can move in a pipeline by self-propelled or guided, and a heating compression unit that is held up and down with respect to the bogie unit, The heating compression unit has an expansion portion that expands into a substantially cylindrical surface having a convex upper surface by the pressure of the air injected into the inside, and a heater for heating the air is provided inside the heating compression unit. It is characterized by having.
[0011]
That is, the heating shaping apparatus presses the surface of the expanding portion expanded by the pressure of the air against the inner surface of the existing pipeline, and presses the water-stopping member or the like held on the surface of the expanding portion to the existing pipeline, A flange turn-back portion is formed at an end of the rehabilitation pipe protruding into the pipe. The pressure of the air to be injected into the inflation portion can be adjusted according to the purpose of crimping and shaping, and the heat of the heater built in the heating compression portion can suitably soften the rehabilitation pipe and the water stopping member. The efficiency and accuracy of rehabilitation work will increase.
[0012]
In the present invention, the heating compression unit is preferably formed by covering a frame in which a planar or net-shaped heater is incorporated with a rubber expansion unit. By providing the frame with a certain thickness, the expansion part can be suitably enlarged while avoiding the heater from directly contacting the expansion part. As a combination form of the frame body and the inflatable portion, a form other than the upper surface of the frame body is formed in an airtight manner, a form in which a sheet-shaped inflatable portion is attached to the upper surface, or a form in which the inflatable portion is formed in a bag shape, For example, a form in which a frame is inserted into the frame may be considered.
[0013]
Further, the frame of the heating compression unit in the present invention may be connected in a state of being divided into two parts in the front and rear direction with respect to the traveling direction of the bogie unit, and may be formed so as to bend via the connection part. According to this configuration, even when the pipeline is bent or a step is formed on the inner surface of the pipeline, the inflatable portion can be smoothly formed along the inner surface of the pipeline.
[0014]
In addition, it is preferable that the surface of the expanded portion in the present invention is subjected to a release treatment for a water-stopping member mainly composed of a synthetic rubber-based pressure-sensitive adhesive. According to this configuration, after the water-stopping member is pressed against the inner surface of the pipeline, the inflatable portion is easily separated from the water-stopper, so that the water-stopper is less likely to fall off.
[0015]
Further, the present invention is characterized in that, when air is injected into the heating compression part, the central part of the expansion part protrudes above other parts and bulges into a substantially hemispherical or substantially truncated conical shape. . According to this configuration, by inserting the central portion of the inflatable portion into the cut end of the rehabilitation pipe protruding into the existing pipeline and enlarging it, it is possible to suitably perform the flange turning operation of the rehabilitation pipe.
[0016]
In the present invention, it is preferable that the top surface of the central portion of the inflating portion projecting upward is formed of an inverted dish-shaped metal member. Accordingly, the expanded pressure in the central portion of the inflated portion can be concentrated on the side, and the work of turning the rehabilitation pipe back can be accurately performed.
[0017]
Further, in the heating shaping apparatus of the present invention, it is preferable that a positioning camera facing upward from the lower side of the inflating section is provided inside the heating compression section. In this case, by forming a window for the camera made of transparent glass or acrylic resin or the like in the vicinity of the center of the inflated portion, positioning during work is facilitated.
[0018]
In addition, in order to further improve the workability, the bogie unit in the heating shaping apparatus according to the present invention includes a swinging unit for inclining the elevating direction of the heating compression unit, and a bogie unit when the heating compression unit is raised. Attitude fixing means for preventing movement and tilting may be provided.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of a heating and shaping apparatus 20 according to the present invention.
[0020]
In the heating shaping apparatus 20, a heating compression unit 22 is supported on a bogie unit 21 which can move in a pipeline (main tube 2 in the illustrated embodiment) by self-running or guidance. The bogie 21 has a bottom formed along the inner surface of the main pipe 2, and wheels 23 or substantially hemispherical legs instead of the wheels 23 are attached near the four front and rear corners of the bottom. The bogie unit 21 moves to a predetermined location of the main pipe 2 (in the illustrated embodiment, in the vicinity of the mounting pipe port 3 to which the mounting pipe 8 is connected) by traction guidance using a wire or the like or through appropriate self-propelled means. I do.
[0021]
The elevating means for supporting the heating compression unit 22 is constituted by, for example, a worm-guide type jack-up mechanism 24 as shown in the figure, a pantograph-type registering, a cylinder / piston mechanism using hydraulic pressure or the like. In the present invention, the type is not particularly limited, but the bogie unit 21 is provided with a motor 25 or a pump for raising and lowering according to the type of the lifting means.
[0022]
Further, the bogie unit 21 may be provided with a swinging means for inclining the elevating direction of the heating compression unit 22 about a rotation axis parallel to the traveling direction of the bogie unit 21. In the illustrated embodiment, the swinging motor 26 is provided in addition to the elevating motor 25.
[0023]
Further, although not shown, the bogie unit 21 is provided with a posture fixing means for preventing the bogie unit 21 from moving or tilting when the heating compression unit 22 is raised. This posture fixing means is constituted by a mechanism or the like in which an elastic member that expands and contracts by, for example, air pressure or hydraulic pressure is erected on the front and rear of the bogie unit 21 so as to be stretched in the main pipe 2.
[0024]
The heating and pressing portion 22 has a rubber inflatable portion 27 which inflates upward by injecting air into the inside thereof to generate pressure. The upper surface of the expansion section 27 is subjected to a surface treatment for improving the releasability of a synthetic rubber-based adhesive, softened vinyl chloride resin, or the like. The expansion portion 27 expands in a substantially arc shape having a convex surface when viewed from the traveling direction of the bogie portion 21, and the central portion 28 of the expansion portion 27 projects further upward than other portions to be substantially hemispherical or substantially hemispherical. It is formed so as to bulge into a truncated cone. An inverted dish-shaped disk member 29 made of stainless steel, aluminum alloy, or the like is attached to the top surface of the central portion 28 that bulges upward. The disk member 29 is formed to have a size that can be inserted into the mounting port 3, and a circular window 30 (see FIGS. 3 and 4) made of transparent glass, acrylic resin, or the like is formed at the center thereof. .
[0025]
As shown in FIG. 3, for example, the heating compression unit 22 is formed by opening the upper surface of a box-shaped frame 31 and airtightly attaching a sheet-shaped expansion unit 27 to the opening surface. . Alternatively, as shown in FIG. 4, the inflatable portion 27 may be formed in a bag shape, and the frame 31 may be inserted therein. In any case, a pipe 32 for injecting and discharging air is connected to the frame 31, and a heater 33 for heating the air is provided inside the frame 31. The heater 33 is preferably a flat or net-like heater 33 having some flexibility, and is incorporated into the frame body 31 so as not to come into direct contact with the expanding portion 27.
[0026]
In the embodiment shown in FIG. 4, the frame body 31 is hinged in a state of being divided into two parts in the front-rear direction with respect to the traveling direction of the bogie unit 21, and the front part and the rear part slightly change the angle via the connection part 34. It is formed so that it can be.
[0027]
Further, a positioning camera 35 is incorporated in the heating compression unit 22 as shown in FIG. 1 in order to facilitate positioning of the heating shaping apparatus 20 at the time of work. The positioning camera 35 is mounted near the center of the frame 31 so as to face upward through the circular window 30 of the inverted disk-shaped disc member 29.
[0028]
The heating and shaping apparatus 20 of the present invention having such a configuration is positioned immediately below the fitting pipe opening 3 as shown in FIG. 1 when the rehabilitation pipe 1 projecting into the main pipe 2 is turned back. Then, the heating compression unit 22 is raised to an appropriate height, and the disc member 29 of the central portion 28 is inserted into the cut end 1 b of the rehabilitation pipe 1. In this state, when air is injected into the heating compression unit 22 and heated by the heater 33 at the same time, the expansion unit 27 expands as shown in FIG. 2 and uniformly spreads while softening the cut end 1 b of the rehabilitation pipe 1. Thus, the flange turn-back portion 1d can be suitably formed along the attachment port 3.
[0029]
When attaching the water-stopping member 40 to the periphery of the mounting port 3, as shown in FIG. The forming device 20 is carried into the main pipe 2. Then, after positioning just below the mounting pipe opening 3, the heating compression unit 22 is lifted in the same manner as described above, so that the expansion unit 27 is expanded and heated by the heater 33. In this way, since the water-stopping member 40 can be pressure-bonded while being heated, for example, a water-stopping member combining a synthetic rubber-based adhesive and a hot melt adhesive, a water-stopping member using a thermoplastic resin, or the like can be accurately formed. Can be stuck.
[0030]
【The invention's effect】
The heating and shaping apparatus of the present invention presses the water stop member or the like held on the surface of the inflatable portion to the existing pipeline by heating the inflatable portion that is inflated by the pressure of air and pressing the inner surface of the existing pipeline. It is configured such that a flange turn-back portion can be formed at an end of the rehabilitation pipe protruding into the pipe. The pressure of the air to be injected into the inflation section can be adjusted according to the work purpose and the pipe condition, and the target object can be softened by the heat of the heater built in the heating compression section. However, the above operation can be performed efficiently and accurately.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration example and a use state of a heating and shaping apparatus according to an embodiment of the present invention, showing a state where a heating compression unit is lowered.
FIG. 2 is also a side view showing a configuration example and a use state of the heating shaping apparatus according to the embodiment of the present invention, showing a state in which a heating compression unit is raised.
FIG. 3 is an exploded perspective view showing a configuration example of a heating press unit in the heating and shaping apparatus shown in FIGS.
4 is an exploded perspective view showing another configuration example of the heating press unit in the heating and shaping apparatus shown in FIGS.
FIG. 5 is a side view showing another state of use of the heating and shaping apparatus shown in FIGS. 1 and 2;
FIG. 6 is a partial perspective view showing an example of a rehabilitation pipe used for lining an existing pipeline.
FIG. 7 is a sectional view of a pipeline showing an outline of a step of inserting a rehabilitation pipe into a mounting pipe.
FIG. 8 is a partial cross-sectional view of the vicinity of a mounting pipe opening showing a state in which a rehabilitating pipe is inserted into the mounting pipe.
FIG. 9 is a partial cross-sectional view of the vicinity of a mounting pipe opening showing a state in which the diameter of the rehabilitating pipe has been increased and the rehabilitating pipe has been closely attached to the inner surface of the mounting pipe.
FIG. 10 is a sectional view of an underground pipeline showing an outline of a step of expanding the diameter of a rehabilitating pipe in a mounting pipe.
FIG. 11 is a cross-sectional view showing the expanded state of the rehabilitation pipe in the order of (a) to (c).
FIG. 12 is a partial cross-sectional view of the vicinity of a mounting pipe opening showing a step of cutting the distal end portion of the expanded rehabilitation pipe with a cutting machine.
FIG. 13 is a partial cross-sectional view showing the vicinity of an attachment pipe opening, showing a step of forming a flange turnback portion at the tip of the rehabilitation pipe.
FIG. 14 is a partial cross-sectional view of the vicinity of a mounting pipe opening showing a state of a flange turnback formed at a distal end of the rehabilitation pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rehabilitation pipe 2 Main pipe 3 Mounting pipe opening 8 Mounting pipe 20 Heating shaping apparatus 21 Dolly part 22 Heat compression part 27 Expansion part 31 Frame body 33 Heater 35 Positioning camera 40 Waterproof member

Claims (9)

A bogie unit that can move by self-propelled or guided in the pipeline, and a heating compression unit that is held up and down with respect to the bogie unit,
The heating compression unit has an expansion portion that expands into a substantially cylindrical surface having a convex upper surface by the pressure of the air injected into the inside, and a heater for heating the air is provided inside the heating compression unit. A heating and shaping apparatus. The heating shaping apparatus according to claim 1, wherein the heating compression unit is formed by covering a rubber body with an expansion unit made of rubber and incorporating a planar or net-shaped heater. The frame body of the heating compression unit is connected in a state of being divided into two parts in the front-rear direction with respect to the traveling direction of the bogie unit, and is formed so as to bend through the connection part. Heat shaping equipment. The heating shaping apparatus according to claim 1, wherein the surface of the expanding portion is subjected to a mold release treatment for a water-stopping member mainly composed of a synthetic rubber-based adhesive. 2. The air compressor according to claim 1, wherein, when air is injected into the heating compression section, a central portion of the expansion section protrudes above other portions and bulges into a substantially hemispherical or truncated cone shape. Heating and shaping equipment. The heating shaping apparatus according to claim 5, wherein a top surface of a central portion of the expanding portion protruding upward is formed of an inverted dish-shaped metal member. The heating shaping apparatus according to claim 1, wherein a positioning camera facing upward from a lower side of the expansion section is provided inside the heating compression section. The heating shaping apparatus according to claim 1, wherein the bogie unit is provided with a swinging means for inclining the elevating direction of the heating compression unit. The heating shaping apparatus according to claim 1, wherein the carriage unit is provided with a posture fixing means for preventing the carriage unit from moving and tilting when the heating compression unit is raised.

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