JP2003159750A - Method and device for turning collar of regenerative conduit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for turning a collar of a regenerative conduit by which a flange can be accurately formed without generating buckling in an attaching pipe near protective area, when forming the flange by spreading the protruded portion of a regenerative conduit which is protruded from the setting pipe in the main pipe. <P>SOLUTION: The method for turning the collar of the regenerative conduit comprises a step for entering a pressurizing part 23 of a collar turning device 2A in a protruded part 1c of the regenerative conduit 1 which is protruded into a main conduit 2 to diametrically expand a protruded part 1c, a step for pressing the regenerative conduit 1 which is in contact with the protruded part 1c to the inner surface of the setting conduit over the entire periphery, and a step for heating and spreading the protruded part 1c with a collar turning part 24 of the collar turning device 2A from the main pipe 2 side and shaping the protruded part 1c so as to be fitted along the inner surface of the main pipe 2, while maintaining the pressing state, to form a flange 1d of a returned collar shape. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rehabilitation work for lining a mounting pipe connected to a main pipe in the ground with a rehabilitation pipe. A flange is formed at the end of the rehabilitation pipe protruding from the inside of the mounting pipe into the main pipe. TECHNICAL FIELD The present invention relates to a flange return method and a flange return device for performing the operation.

[0002]

2. Description of the Related Art Many pipelines for sewage are buried in the ground. This pipe line is generally a main pipe communicating between manholes and a plurality of mounting pipes (branch pipes) connected to the main pipe.
It consists of The mounting pipe is usually provided so as to pass through a basin provided near the surface of the earth and the main pipe, but unlike the main pipe and the manhole, it has a small pipe diameter and is simply configured. For this reason, damage and cracks often occur on the inner surface of the mounting pipe due to its aging. In addition, the connection between the main pipe and the mounting pipe, which were firmly attached at the beginning of construction, may become loose due to the influence of ground movement. If underground water such as rainwater or spring water flows in from the connection point,
The amount of water in the main pipe may exceed the allowable amount of water.

As for the mounting pipe which has deteriorated in this way,
Conventionally, the inner surface of the mounting pipe has been lined with a rehabilitation pipe made of resin to reinforce the pipeline. The applicant of the present invention has also shown in FIG.
The technology shown in FIGS. 0 to 18 has been developed, and a patent application has been filed prior to the present application. The outline will be described below.

This lining method is at least (1)
A rehabilitation pipe insertion step, (2) a rehabilitation tube diameter expansion step, and (3) a rehabilitation tube tip portion treatment step are provided. However, in the illustrated example, (1) prior to the step of inserting the rehabilitating pipe, the inner surface of the main pipe 2 is preliminarily lined with the same rehabilitating pipe 3, and further, at the connection portion of the rehabilitating pipe 3 with the mounting pipe 8,
A sleeve-shaped mounting pipe port 3 a that is raised inside the mounting pipe 8 is formed. In the following description, this rehabilitation pipe 3
Will be described as being integrated with the main pipe 2.

<(1) Step of Inserting Rehabilitation Pipe> FIG. 10 shows an example of the rehabilitation pipe 1. The rehabilitation pipe 1 is made of a thermoplastic resin such as polyvinyl chloride or high-density polyethylene, and has a fold-shaped portion 1a extending along the axial direction formed on the outer surface of the rehabilitation pipe 1 and is radially contracted. The rehabilitation pipe 1 has a property of recovering the shape into a cylindrical body by being heated and pressurized to a predetermined shape memory temperature (for example, 80 ° C.). The tip portion of the rehabilitation pipe 1 is closed by a drawing plug 4 so as to be narrowed, and a wire 5 is connected to the drawing plug 4. When inserting the rehabilitation pipe 1, as shown in FIG. 11, while the rehabilitation pipe 1 is fed out into the mounting pipe 8 from the winder 7 installed near the surface of the box 6 side, the wire 5 connected to the withdrawal plug 4
Is pulled by the winch 10 through the main pipe 2 and the manhole 9. Reference numerals 11 and 12 are pulleys that change the path of the wire 5, and are installed on the inner bottom surface of the main pipe 2.

<(2) Expanding Process of Rehabilitation Pipe> By the insertion work of the rehabilitation pipe 1, as shown in FIG. 12, the tip of the rehabilitation pipe 1 with the lead-in plug 4 reaches the inside of the main pipe 2. Then, as shown in FIG. 13, steam gas is blown into the rehabilitation pipe 1 to heat and expand the rehabilitation pipe 1. At the time of heat expansion, as shown in FIG. 14, the feeding end of the rehabilitation pipe 1 is cut, and the socket 13 is provided in this cut portion in an airtight state. An air supply hose 15 and an exhaust hose 16 from a steam generation heater 14 installed on the ground are connected to the socket 13. When high-temperature and high-pressure steam is blown from the air supply hose 15, the rehabilitation pipe 1 expands due to the pressure of the steam,
As shown in (a) to (c), the fold-shaped portion 1a is reduced in diameter while being expanded, and is brought into close contact with the inner surface of the mounting tube 8 as shown in FIG. The exhaust hose 16 is for discharging excess water vapor out of the pipe.

<(3) Rehabilitation Pipe Tip Processing Step> Next, as shown in FIG. 16, the rehabilitation pipe 1 protruding into the main pipe 2
The tip end of is cut by the cutting machine 17 carried into the main pipe 2, and the cut end 1b of the rehabilitation pipe 1 is opened into the main pipe 2.
At this time, the cut end 1b of the rehabilitating pipe 1 is slightly projected into the main pipe 2 so that the protruding portion 1c of the rehabilitating pipe 1 is left in the main pipe 2. Then, as shown in FIG.
Thermoforming device 18 in which the cut end 1b of c is carried into the main pipe 2
With this, the flange 1d having a flange shape as shown in FIG. 18 is formed by expanding from below. Since the flange 1d thus formed covers the periphery of the attachment pipe port 3a along the inner surface of the main pipe 2, good water shutoff can be obtained even at the connection portion between the main pipe 2 and the attachment pipe 8.

[0008]

According to the above-mentioned conventional lining method, the rehabilitation pipe 1 inserted in the mounting pipe 8 is heated and pressurized to expand and expand the diameter in the mounting pipe 8.
The inner surface of the mounting tube 8 can be rehabilitated quickly and economically.

However, in the step (3) of treating the tip portion of the rehabilitating pipe, the following problems are encountered in expanding the projecting portion 1c of the rehabilitating pipe 1 protruding into the main pipe 2 to form the flange 1d. Points have been confirmed. That is,
The protrusion 1c of the rehabilitation pipe 1 is softened by the heating of the thermoforming device 18, and at the same time, is pushed up by the thermoforming device 18, so that the protrusion 1c tends to be pushed inside the attachment pipe 8. Then, as shown in each of FIGS. 19A and 19B, the vicinity of the protruding portion 1c of the rehabilitation pipe 1 is formed in a state in which it is buckled in the mounting pipe 8 in the axial direction (a) and the circumferential direction (b). There is a risk that

The state of the inner surface of the main pipe 2 and the flange 1d
Depending on the molding state, the molded flange 1d may not sufficiently adhere to the main pipe 2.

The present invention has been made in view of the above circumstances, and in the step (3) of treating the tip portion of the rehabilitating pipe, the mounting pipe 8 is provided in the vicinity of the protruding portion 1c of the rehabilitating pipe 3 protruding into the main pipe 1.
The flange 1d is formed with high precision so that it will not buckle inside, and the flange 1d can be sufficiently adhered to the inner surface of the main pipe 1. It is an object of the present invention to provide a collar-backing device that is suitable for carrying out.

[0012]

In order to solve the above-mentioned problems, the method for resurfacing a rehabilitation pipe according to the present invention is to insert a rehabilitation pipe made of a thermoplastic resin into a mounting pipe connected to the main pipe from the side of a masu, After the closed tip of this rehabilitation pipe reaches the inside of the main pipe, heat and pressurize the inside of the rehabilitation pipe from the side of the grid to expand the diameter until the rehabilitation pipe comes into close contact with the inner surface of the mounting pipe, In the lining work to rehabilitate the mounting pipe by cutting and opening the tip of the pipe, when cutting the tip of the expanded rehabilitating pipe, make a tubular protrusion protruding into the main pipe at the tip. Remaining, press the portion of the rehabilitation pipe close to this protrusion to the inner surface of the mounting pipe from the inside to the entire circumference,
While maintaining the pressed state, the protrusion is heated and expanded from the main pipe side while being expanded and shaped along the inner surface of the main pipe, thereby forming a flange-shaped flange at the tip of the rehabilitation pipe. Characterize.

According to this flange-returning method, the protruding portion of the rehabilitating pipe is expanded while the portion of the rehabilitating pipe in the vicinity of the protruding portion is pressed from the inner side to the inner surface of the mounting pipe. Even when a return device or the like is pressed to shape, the flange can be accurately formed without buckling in the axial direction or the circumferential direction in the portion close to the protruding portion.

Further, before inserting the rehabilitating pipe into the mounting pipe in this flange-returning method, a sheet-shaped water stopping member mainly made of a synthetic rubber adhesive material is provided around the connection portion of the mounting pipe in the main pipe. By affixing and making the flange formed at the tip of the rehabilitating pipe adhere to the inner surface of the main pipe through this water stopping member, the flange and the main pipe can be sealed more watertightly. it can.

Further, according to the device for relining a rehabilitation pipe of the present invention, a rehabilitation pipe made of a thermoplastic resin is inserted into a mounting pipe connected to the main pipe from the side of the masu, and the closed distal end of the rehabilitation pipe is turned into a book. After reaching the inside of the pipe, heat and pressurize the inside of the rehabilitating pipe from the box side to expand the diameter until the rehabilitating pipe is in close contact with the inner surface of the mounting pipe, and cut and open the tip of the rehabilitating pipe protruding into the main pipe. When cutting the tip of the expanded rehabilitating pipe in the lining work to rehabilitate the mounting pipe, the cylindrical protruding part that protrudes into the main pipe is left at the tip, and this protruding part is pulled from the main pipe side. It is a flanged device for pushing and expanding in a circular shape to form a flange, and a trolley part that can move in the main pipe by self-propelling or guiding, and enters into the rehabilitation pipe from the tip side of the projecting portion of the rehabilitation pipe to rehabilitate. The part of the pipe that is close to And a compression part located below the compression part, contacting the protrusion of the rehabilitation pipe from the inside to push and expand the protrusion while heating the protrusion and shaping it along the inner surface of the main pipe. And a support portion that holds the compression portion and the collar return portion on the carriage portion so as to be able to move up and down.

According to this collar device, the compression portion that has entered the rehabilitating pipe presses the portion of the rehabilitating pipe in the vicinity of the protruding portion against the inner surface of the mounting pipe over the entire circumference of the rehabilitating pipe. Therefore, the flange can be accurately formed without causing buckling in the portion close to the protrusion by pushing and expanding the protrusion with the collar return portion while maintaining this state.

In the above-mentioned collar return device, the compression part is a substantially cylindrical hollow body formed of a flexible and airtight material having stretchability, and is supported by the support part so that its cylinder axis is along the tube axis of the rehabilitation pipe. It can be formed so as to expand and contract at least in the radial direction by injecting and discharging a fluid such as air, gas or water. According to this configuration, the compression portion is advanced to a portion close to the protruding portion of the rehabilitation pipe, and air or the like is injected therein to expand the diameter of the compression portion. Can be pressed.

Further, in the above-mentioned collar return device, the compression part includes a rotatably provided core material and a spiral spring-shaped expansion / contraction body attached around the core material, and the material axis of the core material is a pipe of a rehabilitation pipe. The core member can be formed so as to be held by the support portion along the axis and rotate in the forward and reverse directions to expand and contract in the radial direction. According to this configuration, the compression portion is advanced to a portion close to the projecting portion of the rehabilitation pipe, and the core material is rotated there, so that the spiral spring-shaped expansion / contraction portion is expanded in diameter, and the rehabilitation pipe is forced over the entire circumference. Instead, it can be pressed against the inner surface of the mounting tube.

Further, in the above-mentioned flange device, the flange part is a hollow body of a substantially cylindrical shape or a truncated cone shape formed of a flexible and airtight material having elasticity, and its cylinder axis is the tube axis of the rehabilitation pipe. It is formed so that it is held along a support portion along with and that steam, hot air, gas or hot water or other high-temperature fluid is injected / discharged to heat the protruding portion of the rehabilitation pipe at least while expanding / contracting in the radial direction. You can According to this configuration, in a state where the flange portion is inserted into the protruding portion of the rehabilitation pipe, high temperature steam or the like is injected into the flange portion to expand the diameter, thereby heating the protruding portion of the rehabilitation pipe while heating the protruding portion. It can be pushed and spread over the circumference without difficulty and shaped so as to follow the inner surface of the main pipe.

Further, in the above-mentioned flange device, the flange part is provided with a support shaft held by the support part along the pipe axis of the rehabilitating pipe, and arranged around the support shaft to roll around the support shaft. It can be formed so as to push and spread the projecting portion by contacting the projecting portion of the rehabilitating pipe from the inside in a heated state. According to this configuration, while gradually expanding the projecting portion of the rehabilitating pipe by the shaping roller that turns while rolling around, it is possible to perform good shaping without causing cracks or the like at the periphery of the collar return portion. it can.

Further, in the above-mentioned collar-returning device, the compression portion and the collar-returning portion are integrally formed by a substantially cylindrical or substantially truncated cone-shaped hollow body made of a flexible and airtight material having elasticity, and the hollow body tube. The shaft is held by the support part along the pipe axis of the rehabilitation pipe, and steam, hot air, gas or hot water or other high-temperature fluid is injected / exhausted to expand / reduce at least in the radial direction and the protruding part of the rehabilitation pipe. Can be configured to be heated. According to this configuration, the pressing portion is expanded in diameter to press the portion of the rehabilitating pipe in the vicinity of the protruding portion against the inner surface of the mounting pipe, and the flange portion is expanded in diameter to heat the protruding portion of the rehabilitating pipe. The pushing and expanding operation can be performed in conjunction with each other at the same time. In addition, since the structure of the hollow body into which water vapor and the like are injected and discharged is also integrated, the structure of the entire device is simplified and a series of operations is stabilized.

Further, in the structure in which the collar portion is formed of a hollow body having elasticity and is expanded in diameter by injecting water vapor or the like, the diameter of the collar portion is expanded outside the flange portion within a certain range. It is preferable to provide a regulating guide frame. By providing such a guide frame, the internal pressure of the hollow body that expands due to the injection of water vapor or the like can be concentrated on the projecting portion of the rehabilitating pipe and can be efficiently shaped.

The guide frame has a base portion formed into a substantially cylindrical shape or a substantially elliptic cylinder shape which surrounds the periphery of the flange portion, and a tip edge portion thereof is an inner surface of the main pipe when viewed from the pipe axial direction of the main pipe. It is preferable that it is formed so as to have an arcuate shape.
The tip edge portion of the substantially cylindrical body has an annular shape, but by bending this annular portion along the inner surface of the main pipe, a uniform and accurate flange can be formed over the entire circumference of the hollow body.

Further, in the structure in which the flange portion is formed of a hollow body having elasticity and the diameter is expanded by injecting water vapor or the like, an electric heater for heating the fluid is provided inside the flange portion. Good. Thereby, the protrusion of the rehabilitation pipe can be heated more efficiently.

Further, in the above-mentioned collar return device, the support portion is provided with an expansion / contraction mechanism for moving the compression portion and the flange return portion in the axial direction thereof, and an inclining mechanism for inclining the axial direction with respect to the carriage portion. Can be formed. According to this configuration, even if the mounting pipe is obliquely connected to the main pipe or the shaft center of the mounting pipe is eccentrically connected to the main pipe, the mounting pipe is The compression section and the collar section can be inserted into the inserted rehabilitation tube in an appropriate posture.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<Condition of Underground Pipeline Connection> The lining work described in the prior art (see FIGS. 11 to 1).
According to 6), the inner surface of the main pipe 2 is lined with the rehabilitation pipe 3, and at the connection point of the rehabilitation pipe 3 with the mounting pipe 8, a sleeve-shaped mounting pipe raised inside the mounting pipe 8. A mouth 3a is formed. The inner surface of the attachment pipe 8 is also lined with the rehabilitation pipe 1, and the tip end of the rehabilitation pipe 1 is cut off so as to leave a protruding portion 1c protruding into the main pipe 2. In the present invention, the existence of the rehabilitation pipe 3 lining the main pipe 2 is not a constituent of the present invention. Therefore, also in the following description, the rehabilitation pipe 3 lining the main pipe 2 is treated as being integrated with the main pipe 2, and will be described without distinction from the main pipe 2.

In addition, a sheet-shaped water stopping member (not shown) mainly made of a synthetic rubber adhesive is attached around the connection portion of the mounting pipe 8 in the main pipe 2. This water blocking member is attached from the main pipe 2 side to the mounting pipe 8 by an appropriate sticking device.
It is carried in to the connection place of and is pressed and stuck to the inner surface of the main pipe 2. It is necessary to open a round hole communicating with the attachment pipe 8 in the water blocking member, but after the water blocking member is attached to the main pipe 2, a suitable hole drilling device is provided in the main pipe 2 for the round hole. It can be carried in and formed. Alternatively, a water blocking member having a round hole formed in advance may be carried in by a sticking device, and the round hole may be stuck to the main pipe 2 such that the round hole is aligned with the pipe end of the mounting pipe 8.

<First Embodiment of the Collaring Device> FIGS.
FIG. 3 shows the collar return device 20A according to the first embodiment. The collar device 20A has the structure of claims 4 and 6, and is a trolley portion 21 that can move in the main pipe 2.
And a support portion 22 provided on the carriage portion 21, and a support portion 2
The pressure section 23 and the collar return section 24 held by 2 are provided.

The trolley portion 21 is provided with a camera 25, and moves inside the main pipe 2 by self-propelled or traction guidance with a wire or the like,
Is positioned at the connection point between the mounting tube 8 and the mounting tube 8.

The support portion 22 includes the compression portion 23 and the collar return portion 2.
4 is held on the carriage 21 so as to be able to move up and down. Although the specific structure of such a lifting mechanism is not particularly limited, for example, a cylinder piston type expansion / contraction mechanism using fluid pressure such as air pressure, gas pressure, water pressure, hydraulic pressure, or a jack-up mechanism using an electric motor, or a pair The link arm is constructed by utilizing a pantograph-type retorting mechanism or the like in which the link arm expands and contracts in the vertical direction when the distance between the base ends is increased or decreased.

It should be noted that the mounting pipe 8 can be obliquely connected to the main pipe 2, or the mounting pipe 8 can be eccentrically connected to the main pipe 2 in an eccentric manner. In addition, it is desirable that the support portion 22 be configured so that its support shaft can be inclined within a certain range with respect to the upright direction. Further, in order to stabilize the posture of the collar returning device 20A itself particularly when the support shaft is tilted, the carriage portion 21 may be provided with a fixing means for fixing the position and posture thereof. Such fixing means can be configured, for example, by providing the carriage portion 21 with a tension member that advances and retracts toward the inner surface of the main pipe 2.

The compression section 23 is a substantially cylindrical hollow body formed of a flexible and airtight material having elasticity, and by injecting and discharging air, gas, water and the like into the compression section 23, the compression section 23 is radially extended. It is designed to expand and contract like a balloon. The compression portion 23 is normally reduced in diameter so that the outer diameter is slightly smaller than the inner diameter of the rehabilitation pipe 1, and is held in a state in which the tubular shaft is substantially upright along the support shaft of the support portion 22.

The flange portion 24 is also a substantially cylindrical hollow body formed of a flexible and airtight material having elasticity, and by introducing and discharging air, gas, water, etc., in the radial direction. It is designed to expand and contract. However, a fluid such as high-temperature steam, hot air, gas, or hot water is injected into and discharged from the collar portion 24. In addition, an electric heater (not shown) for further heating the fluid may be provided inside the collar portion 24. Clasp part 2
Similarly to the compression portion 23, the outer diameter 4 is normally reduced to a state in which the outer diameter is slightly smaller than the inner diameter of the rehabilitation pipe 1, and the cylindrical shaft is held in a substantially upright state along the supporting shaft of the supporting portion 22. Has been done.

On the bottom surface side of the collar portion 24, the collar portion 24
Is provided with a pressing plate 26 for suppressing downward expansion. The pressing plate 26 is formed in an arc shape whose cross section in a direction orthogonal to the tube axis of the main tube 2 is along the inner surface of the main tube 2.

The rebar work of the rehabilitation pipe 1 by the rebar device 20A is carried out as follows.

As shown in FIG. 1, after the flange device 20A is positioned at the connection between the main pipe 2 and the mounting pipe 8, the support part 22 is extended and the compression part 23 and the flange part 24 are rehabilitated. The cut end 1b of No. 1 is inserted into the protrusion 1c. Then, when the pressing portion 23 passes through the protruding portion 1c and reaches the position corresponding to the mounting pipe port 3a, the extension of the support portion 22 is stopped. At this time, the collar part 24 is located in the protrusion part 1 c of the rehabilitation pipe 1. Here, as shown in FIG.
First, air or the like is injected into the compression portion 23 to expand the diameter of the compression portion 23, and the outer peripheral surface thereof is brought into close contact with the inner surface of the rehabilitation tube 1. As a result, the portion of the rehabilitation pipe 1 close to the protrusion 1c is attached to the attachment pipe port 3
The inner surface of a is pressed.

Next, high temperature steam or the like is injected into the collar portion 24 to expand the diameter of the collar portion 24. As a result, the protruding portion 1c is heated from the inner side thereof to be softened, pushed and expanded in the radial direction, and shaped along the inner surface of the main pipe 2. At this time, the portion of the rehabilitation pipe 1 above the protruding portion 1c is pressed against the inner surface of the mounting pipe port 3a by the pressing portion 23, so that the protruding portion 1c softened by heating smoothly spreads outward over the entire circumference. Be postponed. After a sufficient diameter expansion pressure is applied to the collar return portion 24, the compression portion 23 and the collar return portion 24 are decompressed to reduce the diameter, so that the flange 1d accurately formed remains at the pipe end of the rehabilitation pipe 1. Attachment pipe port 3 in rehabilitation pipe 1
The portion located inside a is continuously pressed by the pressing portion 23, so that the buckling of the rehabilitation tube 1 in the vicinity thereof does not occur.

Subsequently, as shown in FIG. 3, the support portion 22 is further extended to raise the pressing plate 26, and the flange 1d
Press against. The pressing plate 26 has a function of cooling the flange 1d that has been softened by heating and quickly hardening it. As a result, it is possible to promptly proceed with the collar return work. However, the flanged portion 24 is properly expanded in diameter so that the flange 1
If d can be formed along the inner surface of the main pipe 2, the pressing work by the pressing plate 26 can be omitted.

Thus, the flange 1d is attached to the pipe end of the rehabilitation pipe 1.
When the ridge is formed, the support portion 22 is contracted to lower the compression portion 23 and the collar return portion 24, and the collar return device 20A is moved to complete the flange return operation.

<Second Embodiment of Collar Returning Device> FIGS.
FIG. 5 shows a collar returning device 20B according to the second embodiment. This collar return device 20B has the structure of claims 5 and 6, and the compression part 23 and the flange return part 24 have the forms of the flange return device 20A according to the first embodiment.
Is different from.

The compression section 23 includes a rotatably provided core member 23a and a spiral spring-like expansion / contraction body 23b attached around the core member 23a, and the axis of the core member 23a is along the support axis of the support section 22. Are held upright. The expansion / contraction body 23b is formed to expand / contract in the radial direction by rotating the core member 23a in the forward and reverse directions.

The collar portion 24 is a base 2 having a substantially truncated cone shape.
A flexible airtight material 24b having elasticity is provided on the outer side of 4a, and a high-temperature fluid is injected / exhausted between the base body 24a and the airtight material 24b to expand / contract in the radial direction. .

In the collar returning operation by the collar returning device 20B, first, as shown in FIG.
Advance to the inside of the rehabilitation pipe 1, and the mounting pipe port 3a
Expand the inside diameter of. At this time, the collar portion 24 is still in a position where it comes into contact with the cut end 1b of the protruding portion 1c of the rehabilitation pipe 1. From here, a high-temperature fluid is injected into the collar portion 24 to heat it, while gradually raising the diameter of the collar portion 24 and expanding the diameter thereof, as shown in FIG. Push it apart. According to this configuration, the collar unit 24
Since the base body 24a having a substantially truncated cone shape is provided inside, the volume of the fluid injected when expanding the diameter of the collar portion 24 can be reduced.

<Third Embodiment of Collaring Device> FIG. 6
Shows a collar returning device 20C according to a third embodiment. This flange device 20C has the structure of claims 5 and 7, and the form of the flange portion 24 is different from that of the flange device 20B according to the second embodiment.

The brim portion 24 is attached to the support portion 22 and revolves around a support shaft, and a shaping roller 2 rotatably attached to this frame.
4f is provided. The shaping roller 24f is formed in a tapered shape and is heated by, for example, an electric means. The shaping roller 24f is attached to the protruding portion 1 of the rehabilitation pipe 1.
The protruding portion 1c of the rehabilitation pipe 1 is made to contact the cutting end 1b of c and swivel along the peripheral edge of the cutting end 1b while gradually raising the swivel frame 24e.
The flange 1d can be formed by pressing and spreading with 4f.

<Fourth Embodiment of Collaring Device> FIGS.
9 shows the collar return device 20D according to the fourth embodiment. The collar device 20D has the structure of claims 8 to 10, and unlike the first to third embodiments, the compression portion 23 and the collar portion 24 are formed by a hollow body 27 having elasticity. It is formed integrally.

The hollow body 27 is a cylindrical or substantially frustoconical member made of a flexible airtight material, and expands and contracts in the radial direction by injecting and discharging air, gas, water and the like. The upper half portion of the hollow body 27 corresponds to the compression portion 23 in the first embodiment, and the lower half portion also corresponds to the collar return portion 24. As in the first embodiment, the hollow body 27 is normally reduced in diameter such that the outer diameter thereof is slightly smaller than the inner diameter of the rehabilitation pipe 1, and the cylinder axis is substantially along the support axis of the support portion 22. Holds upright. And the support part 2
When 2 extends, the upper half part corresponding to the compression part 23 enters to the position corresponding to the attachment pipe port 3a.

Further, the collar returning device 20D is provided with a guide frame 28 outside the hollow body 27. Guide frame 28
Is a bottom plate 28a fixed to the upper end of the support 22 and a cylindrical base 2 that rises upward from the outer peripheral edge of the bottom plate 28a.
8b, the base 28b surrounds the lower half of the hollow body 27. The leading edge 28c of the base portion 28b is the main pipe 2
Is formed to have an arcuate shape having substantially the same curvature as the inner surface of the main pipe 2 when viewed from the pipe axis direction, and when the support portion 22 extends, it covers the periphery of the attachment pipe port 3a. Contact the inner surface.

8 to 9, the upper half of the hollow body 27 is inserted into the mounting pipe port 3a, and the tip edge portion 28 of the guide frame 28 is shown.
The state which expanded the diameter of the hollow body 27 is shown after contacting b with the main pipe 2. When the diameter of the hollow body 27 is expanded in such a state, the expansion of the lower half of the hollow body 27 in the radial direction is restricted by the guide frame 28 surrounding the hollow body 27, so that the pressure of the injected fluid of the rehabilitation pipe 1 is reduced. It acts intensively near the protrusion 1c. As a result, the flange 1d can be formed efficiently and accurately, and the adhesion between the flange 1d and the main pipe 2 is improved.

Further, in this way, the compression portion 23 and the collar portion 2 are
By integrally forming 4, the operation of expanding the compression portion 23 and the operation of expanding the flange portion 24 can be simultaneously performed, so that the structure and control method of the entire device are simplified. To be done.

An electric heater (not shown) for heating the fluid can be provided inside the hollow body 27 according to this embodiment.

[0053]

According to the method for resurfacing a rehabilitation pipe of the present invention,
When shaping the remodeling pipe by pressing a heating molding device (flame-returning device) or the like from below to expand the protrusion while pressing the part near the protrusion of the rehabilitation pipe from the inside to the inner surface of the mounting pipe. However, the flange can be accurately molded without buckling in the axial direction or the circumferential direction in the portion close to the protruding portion.

Further, according to the device for returning a rehabilitating pipe of the present invention, the compression part that has entered the rehabilitating pipe presses the portion of the rehabilitating pipe in the vicinity of the protruding portion against the inner surface of the mounting pipe over the entire circumference of the rehabilitating pipe. . Therefore, the flange can be accurately formed without causing buckling in the portion close to the protrusion by pushing and expanding the protrusion with the collar return portion while maintaining this state.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a collar returning device of the present invention, showing a state where the collar returning device is positioned at a predetermined position.

FIG. 2 is a side view showing a state in which a flange is formed on the tip portion of the rehabilitating pipe by the collar returning device shown in FIG.

FIG. 3 is a side view showing a state in which the flanged device shown in FIG. 1 is cooling the molded flange while pressing it against the inner surface of the main pipe.

FIG. 4 is a side view showing a second embodiment of the collar returning device of the present invention, showing a state in which the compression portion of the collar returning device is inserted into the rehabilitation pipe.

5 is a side view showing a state in which a flange is formed on the tip portion of the rehabilitating pipe by the collar returning device shown in FIG. 2. FIG.

FIG. 6 is a side view showing a third embodiment of the collar returning device of the present invention, showing a state in which a flange is formed at the tip portion of the rehabilitating pipe by the collar returning device.

FIG. 7 is a side view showing a fourth embodiment of a collar returning device of the present invention, showing a state where the collar returning device is positioned at a predetermined position.

8 is a side view showing a state in which a flange is formed on the tip portion of the rehabilitating pipe by the collar returning device shown in FIG. 7. FIG.

9 is a side view of the state of FIG. 8 as seen from the pipe axis direction of the main pipe.

FIG. 10 is a partial perspective view showing a configuration example of a rehabilitation pipe according to the water stopping method of the present invention.

FIG. 11 is a vertical cross-sectional view of an underground conduit showing an outline of a step of inserting a rehabilitation pipe into a mounting pipe.

FIG. 12 is a partial vertical cross-sectional view of an underground conduit connection portion showing a state in which a rehabilitation pipe is inserted into a mounting pipe.

FIG. 13 is a partial vertical cross-sectional view of an underground pipe connecting portion showing a state in which a diameter-enhanced rehabilitating pipe is brought into close contact with an inner surface of a mounting pipe.

FIG. 14 is a vertical cross-sectional view of an underground conduit showing an outline of a step of expanding the diameter of a rehabilitation pipe in a mounting pipe.

FIG. 15 is a cross-sectional view showing the expanded diameter state of the rehabilitation pipe in the order of (a) to (c).

FIG. 16 is a partial vertical cross-sectional view of an underground pipe connecting portion showing a step of cutting the tip end portion of the diameter-enhanced rehabilitation pipe with a cutting machine.

FIG. 17 is a partial vertical cross-sectional view of the underground conduit connection portion showing a state in which the heating molding device is pressed against the protruding portion of the rehabilitating pipe when the flange is formed on the tip of the rehabilitating pipe.

FIG. 18 is a partial vertical cross-sectional view of an underground pipe line connecting portion showing a state of a flange formed at a tip portion of a rehabilitation pipe.

FIG. 19 shows the rehabilitation pipe in the axial direction (a) in the mounting pipe when a flange is formed at the tip of the rehabilitation pipe according to the prior art.
FIG. 4 is a partial vertical cross-sectional view of an underground pipe line connecting portion showing a state in which it is buckled in the circumferential direction (b).

[Explanation of symbols] 1 Rehabilitation pipe 1c protrusion 1d flange 2 mains 8 Mounting tube 20A, 20B, 20C, 20D collar return device 21 dolly 22 Support 23 Compression section 23a core material 23b Scaled body 24 Collar part 24f shaping roller 27 Hollow body 28 Guide frame 28b base 28c Tip edge

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29L 23:00 F16L 1/02 B (72) Inventor Nagao Gahara 50 Ichiriyama, Hirono-cho, Uji-shi, Kyoto Prefecture Uji Substrate Co., Ltd. (72) Inventor Takuya Yamashita No. 50 Ichiriyama, Hirono-cho, Uji-shi, Kyoto Prefecture F-term in Uji Substrate Co., Ltd. (reference) 3H025 EA01 EB21 EC01 ED02 4F211 AD12 AG03 AG08 AG24 SA13 SC03 SD04 SN10 SP15 SP25 SW23 SW26 SW40

Claims (12)

[Claims] 1. A rehabilitation pipe made of a thermoplastic resin is inserted from a masu side into an attachment pipe connected to the main pipe, and the closed tip of the rehabilitation pipe is extended to the inside of the main pipe, and then the rehabilitation pipe is rehabilitated from the masu side. During lining work to rehabilitate the mounting pipe by heating and pressurizing the inside of the pipe, expanding the diameter of the rehabilitating pipe until it comes into close contact with the inner surface of the mounting pipe, and cutting and opening the tip of the rehabilitating pipe protruding into the main pipe. When cutting the tip of the diametral rehabilitating pipe, leave a cylindrical protrusion that protrudes into the main pipe at the tip, and the part of the rehabilitating pipe that is close to this protrusion from the inside to the entire circumference of the mounting pipe The flange is shaped like a flange on the tip of the rehabilitating pipe by pressing and projecting the protruding part from the main pipe side while heating and pressing and expanding it while keeping the pressed state. A method for resurfacing a rehabilitated pipe, which comprises molding. 2. Prior to inserting the rehabilitating pipe into the mounting pipe, a sheet-shaped water blocking member mainly made of a synthetic rubber-based adhesive material is attached around the connection portion of the mounting pipe in the main pipe. The flange formed at the tip of the rehabilitation pipe is brought into close contact with the inner surface of the main pipe via the water blocking member.
The method for resurfacing a rehabilitation pipe as described in. 3. A rehabilitating pipe made of a thermoplastic resin is inserted into the main pipe from the masu side, the closed tip of the rehabilitating pipe is extended to the inside of the main pipe, and the rehabilitation is performed from the masu side. During lining work to rehabilitate the mounting pipe by heating and pressurizing the inside of the pipe, expanding the diameter of the rehabilitating pipe until it comes into close contact with the inner surface of the mounting pipe, and cutting and opening the tip of the rehabilitating pipe protruding into the main pipe. When excising the tip of the diametral rehabilitating pipe, leave a cylindrical protrusion protruding into the main pipe at the tip, and push this protrusion from the main pipe side in a flange shape to form a flange. It is a collar return device that can move by self-propelled or guided in the main pipe, and the part that enters the rehabilitation pipe from the tip side of the protruding part of the rehabilitating pipe and is close to the protruding part of the rehabilitating pipe. A compression part that presses the inner surface of the mounting pipe over the circumference, and the compression part The flange portion that is located below, expands while contacting the protrusion of the rehabilitation pipe from the inside while heating the protrusion, and forms the shape along the inner surface of the main pipe, and the compression portion and the collar return portion. A rehabilitating pipe collar returning device, comprising: a supporting part that is held on a carriage part so as to be able to move up and down. 4. The compression section is a substantially cylindrical hollow body formed of a flexible airtight material having elasticity, and the cylinder axis of which is held by the support section along the tube axis of the rehabilitation pipe, and air, The flanged device according to claim 3, wherein the flanged device is formed so as to expand and contract at least in the radial direction by injecting and discharging gas or water or other fluid. 5. The compression section includes a rotatably provided core material and a spiral spring-like expansion / contraction body attached to the periphery thereof, and the core material is supported so that the material axis thereof is along the tube axis of the rehabilitation pipe. 4. The flange device according to claim 3, wherein the core member is held by the portion and is formed so as to rotate in the forward and reverse directions and expand and contract in the radial direction. 6. The flange part is a hollow body of substantially cylindrical shape or substantially frustoconical shape formed of a flexible and airtight material having elasticity, and is supported by a supporting portion such that its cylinder axis is along the tube axis of the rehabilitation pipe. It is formed so that it is held and expands or shrinks at least in the radial direction by heating and injecting steam, hot air, gas or hot water or other high-temperature fluid to heat the projecting portion of the rehabilitation pipe. Item 3. The collar device according to Item 3. 7. The collar return portion is provided with a support shaft held by a support portion along the pipe axis of the rehabilitating pipe, and arranged around the support shaft so as to roll around the support shaft while rotating. The brim device according to claim 3, further comprising a shaping roller, wherein the shaping roller pushes and spreads the protruding portion of the rehabilitating pipe from inside by contacting the protruding portion in a heated state. 8. The compression section and the collar return section are integrally formed by a substantially cylindrical or substantially frustoconical hollow body made of a flexible and airtight material having stretchability, and the cylinder axis of the hollow body is a pipe of a rehabilitation pipe. Water vapor, which is held by the support along the axis,
The hot air, gas or hot water or other high-temperature fluid is injected and discharged to expand and contract at least in the radial direction to heat the projecting portion of the rehabilitation pipe. Tsuba device. 9. The flange device according to claim 6, further comprising a guide frame provided outside the flange part for restricting a diameter expansion of the flange part within a predetermined range. 10. The guide frame has a base portion formed into a substantially cylindrical shape or a substantially elliptic cylinder shape that surrounds the periphery of the flange portion, and a tip edge portion of the main pipe as viewed from the pipe axial direction of the main pipe. The flange device according to claim 9, wherein the flange device is formed in an arc shape along the inner surface. 11. The support section includes an expansion mechanism for moving the compression section and the collar return section in the axial direction thereof, and an inclination mechanism for inclining the axial direction with respect to the carriage section. The collar device according to item 3. 12. The electrothermal heater for heating a fluid is provided inside the flange portion.
Or the collar device according to 8.