JP2022099751A - Fusion device for renovation material and connection method for renovation material - Google Patents

Abstract

To make it possible to feed out a liner tube wound around a drum as smoothly as possible.SOLUTION: A fusion device 1 in which a liner tube 50, in which a portion of an outer surface of a tubular material 51 forms a recessed part 52, is wound around an axial center 54a of a drum 53, and a starting edge part B of the liner tube 50, which is fed out from the drum 53 with the recessed part 52 transverse to a vertical direction, is connected to an end edge part A of another preceding liner tube 50, has: a first formwork 20 with a convex part 23 that enters into a concave part 52 of the liner tube 50; and a second formwork 30 that sandwiches the liner tube 50 opposite the first formwork 20. One of the first formwork 20 and the second formwork 30 is held in a frame 2 so as to sandwich the liner tube 50 from a lateral direction with respect to the vertical direction, and the other is freely accessible toward one of them.SELECTED DRAWING: Figure 1A

Description

The present invention relates to a fusion device for a rehabilitating material that covers the inner surface of a pipe, and a method for connecting the rehabilitating material.

Conventionally, when various pipes such as water supply pipes (hereinafter referred to as existing pipes) have deteriorated, a pipe made of a flexible material is inserted into the existing pipe and the pipe is brought into close contact with the inner surface of the existing pipe. As a result, the pipeline is being rehabilitated. A pipe body that is in close contact with the inner surface of an existing pipe is called a liner pipe, and an existing pipe whose inner surface is covered with a liner pipe is called a rehabilitation pipe.

Examples of the rehabilitation method for existing pipes include a polyethylene / compact pipe method, an omega liner method, an EX method, and a subline method. In the polyethylene compact pipe method, a high-density polyethylene pipe with a C-shaped cross section wound around a drum is inserted into an existing pipe in the ground through a human hole (vertical shaft) and brought into close contact with the existing pipe to rehabilitate the old pipe. It is a sewage pipe rehabilitation method (pipe rehabilitation method). In the omega liner method, a folded ω-shaped hard vinyl chloride pipe with a shape memory function is drawn into the pipe from the shaft, steam is sent to the hard vinyl chloride pipe to heat it, and it is rapidly restored to a circular shape and further compressed. This is a pipe rehabilitation method that reinforces the inner surface of the pipe by making it adhere to the inner surface of the pipe with air. The EX method is a pipe rehabilitation method in which a rigid vinyl chloride pipe is heated and softened by steam and hot air, and the existing pipe is continuously drawn from a shaft into an existing pipe in a state where steam is passed through to rehabilitate the existing pipe. In the sub-line method, a thin polyethylene pipe is usually folded into a heart shape and continuously drawn into the existing pipe, water pressure is applied to the polyethylene pipe over the entire line, and the polyethylene pipe is restored to a circular shape and crimped to the inner surface of the existing pipe. It is a construction method.

In these construction methods, it is necessary to transport the liner pipe to the construction site. The liner tube is generally transported in a state of being wound around a drum. Here, as shown in FIG. 5, the liner pipe 50 has a U-shaped cross section in which a part of the outer surface of the tubular member 51 forms a concave recessed portion 52 extending in the longitudinal direction. The liner tube 50 is wound so that the recessed portion 52 is laterally oriented with respect to the vertical direction, that is, the opening of the recessed portion 52 faces the axial center direction when the axial center of the drum 53 is horizontal. There is. This is to reduce the winding thickness in the radial direction at the time of winding around the drum 53 (to secure a large number of windings).

When rehabilitating the existing pipe, the liner pipe 50 is sent out from the drum 53 side, and the liner pipe 50 is inserted into the existing pipe. When the liner pipe 50 wound around the drum 53 reaches the end portion, another drum 53 is prepared, and the end portion of the liner pipe 50 under construction and the start end portion of the liner pipe 50 of another drum 53 are prepared. Is connected by fusion splicing. As a method of connection by fusion, for example, there are those described in Patent Documents 1 and 2.

Japanese Unexamined Patent Publication No. 11-230472 Japanese Unexamined Patent Publication No. 2008-286272 (see FIG. 9 and the like)

As described above, the liner tube in which a part of the outer surface of the tubular material forms a concave recess is wound with the recess sideways with respect to the drum. Therefore, even when the liner pipe is sent from the drum side to the existing pipe side, the recessed portion is in a sideways state. However, as described in Patent Documents 1 and 2, the fusion device (butt fusion machine) for connecting the liner pipes performs the fusion operation with the recessed portion facing upward or downward. Designed as a premise. That is, it includes a first formwork having a convex portion that enters the concave portion of the liner tube, and a second formwork having an arcuate concave inner surface having no convex portion, and the first formwork and the second formwork. One of the formwork is arranged so as to open upward with respect to the frame and the other to open downward toward one side. Therefore, it is necessary to rotate the liner tube at least 90 degrees around the tube axis from the drum to the fusion splicer.

Although the liner tube is made of a flexible material and has a certain degree of flexibility, it is a material that does not deform unless a considerably strong force is applied, especially in a low temperature state, and is also a very heavy material. .. For this reason, if the direction of the recess is changed from the drum to the fusion splicer, the force required to deform the material becomes resistance to the movement of the liner tube in the feeding direction, which is necessary for feeding the liner tube. There is a problem that the torque increases. It is desirable that the liner pipe can be sent out as smoothly as possible.

Therefore, an object of the present invention is to make it possible to send out the liner tube wound around the drum as smoothly as possible.

In order to solve the above problems, in the present invention, a liner tube in which a part of the outer surface of the tubular material forms a concave recess is wound around the axis of the drum, and the above is described in the vertical direction. In a fusion device that connects the start end of a liner tube sent out from the drum with the recess sideways to the end of another liner tube in front of the drum, the fusion device is provided with a protrusion that enters the recess of the liner tube. A first formwork and a second formwork that faces the first formwork and sandwiches the liner tube are provided, and one of the first formwork and the second formwork is provided. , A fusion device is adopted in which the liner pipe is held by the frame so as to sandwich the liner pipe from the lateral direction with respect to the vertical direction, and the other side can be attached to and detached toward the one side.

Here, the configuration in which the one is the first formwork and the other is the second formwork can be adopted.

Further, the frame is arranged below the drum, and the frame is in a state where the first formwork and the second formwork sandwich the liner tube, and the tube axis direction of the liner tube is the said. A configuration in which the first formwork and the second formwork are held can be adopted so as to have a downward slope from the start end portion side to the end portion side.

Further, in order to solve the above-mentioned problems, in the present invention, a liner tube in which a part of the outer surface of the tubular material forms a concave recess is wound around the axis of the drum and is directed in the vertical direction. In a method of connecting a liner pipe in which the start end portion of the liner pipe sent out from the drum with the recessed portion oriented sideways is connected to the end portion of another liner pipe that precedes the recessed portion, the convex portion that enters the recessed portion of the liner pipe. Using a first mold provided with a portion and a second mold that faces the first mold and sandwiches the liner tube, the first mold and the second mold are used. The first step of arranging one of them so as to sandwich the liner pipe from the lateral direction with respect to the vertical direction, the second step of addressing the start end portion and the end portion to the one end portion, and the one end portion. Connection of a liner pipe including a third step of bringing the other close to each other to hold the start end portion and the end portion between the one and the other, and a fourth step of fusing the start end portion and the end portion. Adopted the method.

Here, the first step includes a step of adjusting the angles of the first form and the second form according to the gradient from the start end side to the end end side of the liner pipe. It is possible to adopt the configuration that is used.

Further, a configuration having a fifth step of retracting the frame, the first formwork and the second formwork can be adopted after the fourth step.

INDUSTRIAL APPLICABILITY According to the present invention, the liner tube wound around the drum can be sent out more smoothly.

Sectional drawing (open state) which shows one Embodiment of this invention Sectional drawing (closed state) which shows one Embodiment of this invention Perspective view of the same embodiment (open state) Perspective view of the same embodiment (closed state) Sectional view showing the state of rehabilitation work (during fusion work) Sectional view showing the state of rehabilitation work (at the time of evacuation) Front view showing the state of the liner tube wound around the drum

An embodiment of the present invention will be described with reference to the drawings. This embodiment is used to connect the liner pipes 50 to each other when the liner pipes 50 made of a flexible material are brought into close contact with the inner surface of the already installed old pipe Q and rehabilitated. It is a connection method of a fusion apparatus 1 and a liner pipe 50 using the fusion apparatus 1. The configuration of the fusion splicer 1 is shown in FIGS. 1A to 2B. The usage state of the fusion splicer 1 is shown in FIGS. 3 and 4. FIG. 5 shows a state in which the liner tube 50 is wound around the drum 53.

The material of the liner tube 50 is a material having flexibility as in the conventional example, and for example, a tubular material (tube) 51 made of a resin such as thermoplastic or a flexible material such as rubber is used. Be done. The liner pipe 50 is inserted into the existing pipe Q through a pit (shaft) P excavated in the ground G, the tubular material 51 is expanded with steam and compressed air to bring it into close contact with the inner peripheral surface of the existing pipe Q, and then. , Cool and solidify to rehabilitate the pipe.

The liner pipe 50 is a cross section in which a part of the outer surface of the tubular member 51 forms a concave recessed portion 52 in a state before being used for rehabilitation, and this cross section continues over the entire length in the longitudinal direction. There is. The recessed portion 52 is recessed in a direction in which the cross-sectional area of the internal space is reduced as compared with a state in which the internal space of the tubular member 51 is expanded to have a circular cross section. The cross-sectional shape orthogonal to the tube axis of the liner tube 50 is, for example, a C-shaped cross section, a U-shaped cross section, a heart-shaped cross section, or the like. In the embodiment, the liner pipe 50 has a U-shaped cross section, and the recessed portion 52 includes a pair of side walls 52b and 52b facing each other and a bottom portion 52a connecting the back ends of the pair of side walls 52b and 52b in an arc shape. There is. The liner tube 50 is wound around the support shaft 54 of the drum 53. At this time, the opening of the recessed portion 52 is wound so as to face the direction along the axis 54a of the support shaft 54. Therefore, when the axial center 54a of the drum 53 is in the horizontal direction, the recessed portion 52 is wound so as to be laterally oriented with respect to the vertical direction (see FIG. 5).

As shown in FIGS. 3 and 4, the pit P is excavated from the ground surface to a predetermined depth, and the existing pipe Q is opened slightly above the bottom surface of the pit P. Further, another pit P is provided at another place (not shown). The pit P shown in FIGS. 3 and 4 is the starting point of the liner pipe 50, and another pit P is the reaching pit of the liner pipe 50. The drum support device 60 rotatably supports the drum 53 around which the liner tube 50 is wound. The liner tube 50 is wound around the drum 53 by a required number of times in parallel in the axial direction of the support shaft 54 and by a required number of layers in the radial direction away from the support shaft 54. The gantry that supports the drum 53 includes a base 59 that is placed on the ground G and a support leg 55 that rises from the base 59. The support legs 55 rotatably support the support shaft 54 around the axis 54a via bearings. Since the drum 53 is removable from the support leg 55, if the liner tube 50 wound around one drum 53 disappears, it can be replaced with another drum 53. Further, the drum support device 60 includes a drive device 56 that rotates the drum 53 at a constant speed by a driving force and sends out the liner tube 50. Since the drive roller included in the drive device 56 is pressed against the outer periphery of the drum 53 or the wound liner pipe 50 by the pressing device 57 made of a hydraulic cylinder or the like, if the drive roller is rotated by the driving force, the drum 53 will be pressed. Rotate around the axis.

The liner pipe 50 is sent out to the existing pipe Q side by the rotation around the axis of the drum 53. When the liner pipe 50 enters the existing pipe Q and the liner pipe 50 wound around the drum 53 reaches the end portion A, another drum 53 is prepared and the end of the liner pipe 50 under construction is prepared. By connecting the portion A and the start end portion B of the liner pipe 50 of another drum 53 by fusion splicing, it is possible to continue the feeding. FIG. 3 shows a state in which the end portion A and the start end portion B are fused by the fusion apparatus 1.

As shown in FIGS. 1A and 1B, the fusion device 1 is configured to face the first formwork 20 having the convex portion 23 that enters the recessed portion 52 of the liner pipe 50 and the first formwork 20. It is provided with a second formwork 30 for sandwiching the liner pipe 50. The first formwork 20 is formed from a concave surface 22a having an arcuate cross section along the outer surface of the cylindrical portion 51a excluding the concave portion 52 of the outer surface of the tubular member 51, and a bottom portion located in the middle of the concave surface 22a. The holding portion 22 (hereinafter, referred to as the first holding portion 22) provided with the above-mentioned convex portion 23 that stands up is provided in the skeleton 21. Here, the arc-shaped cross section is not limited to a curve composed of a single curvature, but is a concept including a combination of a plurality of curves having different curvatures, a curve in which the curvature changes continuously, and the like. The skeleton 21 and the first holding portion 22 are integrally fixed by bolts, nuts, or the like. The concave surface 22a has a cylindrical surface shape extending along the longitudinal direction of the liner tube 50 (depth direction in FIGS. 1A and 1B). The convex portion 23 connects the pair of side surfaces 23b and 23b that are in contact with the pair of side walls 52b and 52b of the recessed portion 52 and the tips of the paired side surfaces 23b and 23b in an arc shape, and is in contact with the bottom portion 52a of the recessed portion 52. It has a top 23a. The second formwork 30 also has a holding portion 32 (hereinafter referred to as a second holding portion 32) having a concave surface 32a having an arcuate cross section along the cylindrical outer surface excluding the portion of the concave portion 52 of the outer surface of the tubular material 51. (Referred to as) is provided in the skeleton 31. The skeleton 31 and the second holding portion 32 are integrally fixed by bolts, nuts, or the like. The concave surface 32a has a cylindrical surface shape extending along the longitudinal direction of the liner tube 50.

A heating device (not shown) is provided in the first mold 20 and the second mold 30. The heating device can raise the members constituting the first sandwiching portion 22 and the second sandwiching portion 32 to the temperature required for fusion of the materials constituting the liner pipe 50. The cross-sectional shapes of the first holding portion 22 and the second holding portion 32 are the same over the entire length along the longitudinal direction of the liner pipe 50, respectively. The cross-sectional shapes of the first holding portion 22 and the second holding portion 32 can be changed according to the cross-sectional shape of the liner pipe 50 to be used, the size of the cross-section, and the like. Further, the members constituting the first holding portion 22 and the second holding portion 32 are made of a material having high durability against heat and wear.

One of the first formwork 20 and the second formwork 30 is held by the frame 2 so that the liner pipe 50 can be sandwiched from the lateral direction with respect to the vertical direction, and the other formwork is held on the other side. It can be attached and detached toward the formwork of. That is, the formwork planes of the first formwork 20 and the second formwork 30 are in the vertical direction along the vertical member 3. In this embodiment, one formwork is the first formwork 20 and the other formwork is the second formwork 30. That is, the first formwork 20 is fixed to the frame 2 in a state where the concave surface 22a constituting the first holding portion 22 is opened sideways, that is, in the horizontal direction. Therefore, the convex portion 23 is in a lateral direction, that is, in a state of projecting in the horizontal direction. The frame 2 has an L-shaped cross section including a horizontal member 4 placed on the floor surface and a vertical member 3 rising from an end portion of the horizontal member 4. The skeleton 21 of the first form 20 and the vertical member 3 of the frame 2 are integrally fixed by bolts, nuts, or the like.

The second formwork 30 has a state in which the concave surface 32a constituting the second holding portion 32 is opened upward (open state shown in FIGS. 1A and 2A) and a state in which the concave surface 32a is opened sideways (horizontally) to form the first mold. It is rotatable so as to face the first holding portion 22 of the frame 20 (closed state shown in FIGS. 1B and 2B). This rotation is possible because the skeleton 21 and the skeleton 31 are connected via the pin 33a, as shown in FIGS. 2A and 2B. The insertion piece 33b provided in the skeleton 31 is inserted into the groove provided in the skeleton 21, and the pin 33a penetrates the side wall portions 25 on both sides of the groove and the insertion piece 33b. Further, between the first formwork 20 and the second formwork 30, the first sandwiching portion 22 and the second sandwiching portion 32 face each other so that the liner pipe 50 can be sandwiched (closed state). A locking means 24 for locking the formwork 20 of 1 and the formwork 30 of the second formwork 30 is provided. The locking means 24 is composed of a lock lever 24a supported by a pin 24b on the skeleton 21 and an engaging portion 34 provided on the skeleton 31. When the lock lever 24a rotates around the axis of the pin 24b, the lock lever 24a enters the engaging groove 34a of the engaging portion 34, and the first mold 20 and the second mold 30 come together. It is locked so that it does not move.

During the rehabilitation work of the existing pipe Q, as shown in FIG. 3, the frame 2 of the fusion device 1 is arranged below the drum 53. This is because the drum 53 is generally placed on the ground and the fusion splicer 1 is arranged in the pit P. In the pit P, the liner pipe 50 pulled out from the drum 53 arranged on the ground enters from above, and in the pit P, the liner pipe 50 advances downward toward the opening of the existing pipe Q provided on the side wall in the pit P. I will go. When the liner pipe 50 is fused in the pit P, it is desirable to arrange the fusion apparatus 1 in the pit P along the traveling direction of the liner pipe 50. Therefore, in the frame 2, in a state where the first formwork 20 and the second formwork 30 sandwich the liner pipe 50, the pipe axis direction of the liner pipe 50 is from the start end portion B side to the end portion A side. The first formwork 20 and the second formwork 30 are held so as to have a downward slope. That is, as shown in FIG. 3, the frame 2 has a pedestal 6 so that the cross member 4 has an elevation angle α (0 ° <α <90 °) with respect to the horizontal direction toward the direction away from the existing pipe Q. It is placed on the inclined surface 6a. The elevation angle α of the inclined surface 6a of the pedestal 6 can be adjusted to a desired angle by an angle adjusting means (not shown) such as an electric actuator or a manual lifting jack.

The method of connecting the liner pipe 50 using the fusion device 1 will be described. First, the first formwork 20 having the convex portion 23 that enters the recessed portion 52 of the liner pipe 50 and the first formwork 20 Using the second formwork 30 that sandwiches the liner pipe 50 so as to face each other, the first formwork 20 is provided so that the first formwork 20 can sandwich the liner pipe 50 from the lateral direction with respect to the vertical direction. Deploy. Specifically, if the frame 2 to which the fusion device 1 is fixed (the first formwork 20 is fixed to the vertical member 3) is arranged in the middle of the passage route of the liner pipe 50 in the pit P. good. This is referred to as a first step. Then, as shown in FIGS. 1A and 2A, the start end portion B of the newly introduced liner pipe 50 and the end portion A of the preceding liner pipe 50 are addressed to the first mold 20. This is referred to as a second step. Subsequently, the second formwork 30 is brought closer to the first formwork 20, and the first holding portion 22 of the first formwork 20 and the second holding portion 32 of the second formwork 30 are used. Holds the start end portion B and the end portion A. In this embodiment, the second formwork 30 may be rotated with respect to the first formwork 20 fixed to the frame 2. This is referred to as a third step. In the third step, it is required that the start end portion B and the end portion A having the same cross section are fixed in a straight line without a step. Subsequently, the temperature of each formwork is raised by using a heating device, and the start end portion B and the end portion A are connected by fusion splicing. This is referred to as a fourth step.

In the first step, as shown in FIG. 3, the liner pipe 50 has a predetermined gradient (downward gradient in the embodiment) from the start end portion B side to the end portion A side. A step of adjusting the angle (elevation angle α) of the first formwork 20 and the second formwork 30 so as to match the gradient may be included. This angle can be adjusted by the above-mentioned angle adjusting means. Further, a fifth step of retracting the frame 2, the first formwork 20 and the second formwork 30 may be set after the fourth step. The fifth step is to move the fusing device 1 and the frame 2 integrated with the fusing device 1 from the working position shown in FIG. 3 to the retracted position shown in FIG. On the contrary, when the fusion work is started, in the first step, the fusion device 1 and the frame 2 integrated with it are moved from the retracted position shown in FIG. 4 to the working position shown in FIG. ..

In this way, since the mold split surfaces of the first mold 20 and the second mold 30 holding the liner pipe 50 are set in the vertical direction, the liner pipe 50 is from the drum 53 to the fusion splicer 1. In addition, it is not necessary to rotate the liner pipe 50 around the pipe axis (twist along the longitudinal direction). Therefore, the resistance of the liner pipe 50 to move in the feeding direction can be reduced, and the liner pipe 50 can be smoothly fed. In the above embodiment, the first formwork 20 having the convex portion 23 that penetrates into the concave portion 52 of the liner pipe 50 is fixed to the vertical member 3 of the frame 2, but the liner pipe 50 after fusion is easily used. In order to enable peeling, the first formwork 20 provided with the convex portion 23 is on the moving side, the second formwork 30 is on the fixed side, that is, the second formwork 30 is vertically on the frame 2. It is advantageous to fix it to the material 3.

Further, in the above embodiment, either one of the first formwork 20 and the second formwork 30 is fixed to the vertical member 3 of the frame 2 and moves with respect to the one formwork on the fixed side. The other formwork on the side is rotatably supported via the pin 33a, but the other formwork on the moving side may be rotatably supported with respect to the frame 2. .. Further, the other formwork on the moving side and the one formwork on the fixed side are made to face each other, and the orientation is maintained so that the other formwork can be slidably slid horizontally along the cross member 4 of the frame 2. , One formwork and the other formwork may be brought into contact with each other by the slide.

1 Fusing device 2 Frame 3 Vertical member 4 Horizontal member 20 First formwork 22 First holding part 23 Convex part 30 Second formwork 32 Second holding part 50 Liner pipe 51 Cylindrical material 52 Recessed part 53 Drum 54a Axial center A End part B Start end part P Pit Q Existing pipe

Claims (6)

The liner tube (50), in which a part of the outer surface of the tubular material (51) forms a concave recess (52), is wound around the axis (54a) of the drum (53) and is oriented in the vertical direction. The start end portion (B) of the liner pipe (50) sent out from the drum (53) with the recessed portion (52) turned sideways is connected to the end portion (A) of another preceding liner pipe (50). In the fusion device
A first formwork (20) having a convex portion (23) that enters the recessed portion (52) of the liner tube (50), and the liner tube (20) facing the first formwork (20). A second formwork (30) for sandwiching 50) is provided.
One of the first formwork (20) and the second formwork (30) is held by the frame (2) so as to sandwich the liner pipe (50) from the lateral direction with respect to the vertical direction. A fusion device in which the other is free to connect and detach toward the one. The fusion device according to claim 1, wherein one is the first formwork (20) and the other is the second formwork (30). The frame (2) is arranged below the drum (53), and in the frame (2), the first mold (20) and the second mold (30) are the liner pipe (50). ) Is sandwiched between the first molds () so that the axial direction of the liner pipe (50) has a downward slope from the start end portion (B) side to the end end portion (A) side. 20) and the fusion device according to claim 1 or 2, which holds the second formwork (30). A liner tube (50) in which a part of the outer surface of the tubular material (51) forms a concave recess (52) is wound around the axis (54a) of the drum (53) and is oriented in the vertical direction. The start end portion (B) of the liner pipe (50) sent out from the drum (53) with the recessed portion (52) turned sideways is connected to the end portion (A) of another preceding liner pipe (50). In the connection method of the liner pipe
A first formwork (20) having a convex portion (23) that enters the recessed portion (52) of the liner tube (50), and the liner tube (20) facing the first formwork (20). Using the second formwork (30) sandwiching the 50), either one of the first formwork (20) and the second formwork (30) is laterally oriented with respect to the vertical direction. The first step of arranging the liner pipe (50) so as to sandwich it,
A second step of addressing the start end portion (B) and the end portion (A) to one of the above,
A third step of bringing the other closer to the one and holding the start end portion (B) and the end portion (A) between the one and the other.
A fourth step of fusing the start end portion (B) and the end portion (A),
How to connect the liner tube. In the first step, the first mold (20) and the second mold are made according to the gradient from the start end portion (B) side to the end portion (A) side of the liner pipe (50). The method for connecting a liner tube according to claim 4, further comprising a step of adjusting the angle of the frame (30). The liner according to claim 4 or 5, further comprising a fifth step of retracting the frame (2), the first formwork (20), and the second formwork (30) after the fourth step. How to connect the pipe.

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