JP2021084245A - Insertion guide device to existing pipe of liner for regeneration - Google Patents

Abstract

To smoothly draw and guide a liner from a drum 10 around which a liner R is wound into an insertion port of an existing pipe P.SOLUTION: When a liner R made of a thermoplastic resin tube is drawn from a drum 10 around which the liner R is wound, the liner R is inserted into an existing pipe P embedded in the ground from a vertical shaft H1 of the ground G and is heated and pressurized, and an inner wall surface of the existing pipe P is coated with the liner R, a guide device guides the liner R drawn from the drum 10 into an insertion port of the existing pipe P. Front/rear and right/left directions guide rolls 26 are provided at the insertion port of the vertical shaft H1 from the drawn side of the liner R. Guide rollers 46 are provided in the middle and the end of a curve part of the liner R to the insertion port of the existing pipe P from the insertion port. Since the liner is guided by rotation of each of the guide rollers, the liner is smoothly drawn and retracted into the insertion port of the existing pipe from the drum while having a circular arc shape. Each of the rollers can adjust a mounting position and a height.SELECTED DRAWING: Figure 2

Description

In the present invention, when the inner wall surface of an existing underground pipe such as agricultural water, a sewer pipe, a water supply pipe, or a gas pipe is covered with a tubular liner made of a thermoplastic resin and rehabilitated, the liner drawn from the drum is used. It relates to a guide device for guiding to an insertion port of an existing pipe.

Rehabilitation methods for existing pipes include polyethylene / compact pipe construction methods, omega liner construction methods, EX construction methods, and subline construction methods.
In the polyethylene compact pipe method, a C-shaped high-density polyethylene pipe 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, and the old pipe is rehabilitated. 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 pulled into the pipe from the shaft, steam is sent to the hard vinyl chloride pipe to overheat it, and it is rapidly restored to a circular shape and further compressed. This is a pipe rehabilitation method in which the inner surface of the pipe is brought into close contact with air to reinforce it.
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 rehabilitated by continuously drawing the hard vinyl chloride pipe from the shaft into the existing pipe while passing the steam.
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 any of these construction methods, a pipe (pipe, hereinafter also referred to as "liner" as appropriate) is inserted into the existing pipe, so it is necessary to transport the pipe to the construction site, and it is usually wound around a drum. It is being transported.
At that time, it is generally transported (transported) by a 10-ton vehicle, and has a drum size for easy transportation and construction. Therefore, in terms of pipe (liner) performance, the internal pressure resistance performance is set to 0.5 MPa or less to make the liner wall thickness relatively thin, and the construction extension (winding extension) is shortened (diameter: 400 mm pipe). In the case of about 100 m).

Further, in each construction method, the liner is pulled out from a drum wound with a liner made of a thermoplastic resin pipe, and the liner is pulled out from one shaft at both ends of an existing pipe of a certain length buried in the ground. This is in the rehabilitation of an existing pipe, which is inserted into an existing pipe to reach the other shaft, heats and pressurizes the liner, and covers the inner wall surface of the existing pipe with the liner.
Further, the liner winding drum support device includes a base frame and support legs erected on the frame, and the drum is attached to the support legs (Patent Document 1, FIG. 1, Patent Document). 2. See Fig. 4 etc.).

Japanese Unexamined Patent Publication No. 2009-14059 Japanese Unexamined Patent Publication No. 2013-107280 JP-A-2019-74099

The conventional drum support device is installed near the opening of the shaft into which the liner is inserted at the construction site so that the liner is pulled into the shaft (see Patent Document 2 and FIG. 9).
At this time, it is necessary to smoothly guide the liner pulled out from the drum to the insertion port of the existing pipe. In the past, there was no preferred guide device. For this reason, the liner is usually pulled in by the pulling force of the winch from the other shaft, and the liner is often not smoothly pulled (inserted) into the existing pipe.

An object of the present invention is to allow the liner to be smoothly pulled out from the drum and guided to the insertion port of the existing pipe under the above circumstances.

In order to achieve the above object, in the present invention, the liner drawn from the drum is usually curved (arc) from the insertion port from the drum to the shaft and from the insertion port toward the insertion port of the existing pipe. (See FIGS. 1 and 2 of the present application) Therefore, it was decided to provide a required number of guide rollers at the insertion port of the liner into the shaft and the curved portion of the liner from the insertion port to the insertion port of the existing pipe.
According to the guide roller, since the liner is guided by its rotation, the liner is smoothly pulled out and pulled in from the drum to the insertion port of the existing pipe in an arc shape.

Specifically, the liner is pulled out from a drum wound with a liner made of a thermoplastic resin tube, the liner is inserted from a shaft of the ground into an existing pipe buried in the ground, and the liner is heated and added. A guide device that guides the liner pulled out from the drum to the insertion port of the existing pipe when the inner wall surface of the existing pipe is covered with the liner by pressing, and is the insertion port of the liner into the shaft and the insertion port thereof. We adopted a configuration in which the required number of guide rollers were provided at the curved points of the liner from the to the insertion port of the existing pipe.

The installation position and number of the guide rollers may be appropriately set by experiments or the like so that the liner has an arc shape and is guided smoothly. For example, a parallel pair of bases having the support legs of the drum. If guide rollers are provided on the frame via a base, the liner drawn from the drum is guided between the front, rear, left, and right guide rollers, and even if the liner swings left and right in the axial direction of the drum, the front and back. It can be guided smoothly into the shaft by being guided by the left and right guide rollers.
In addition, a guide roller may be provided in the middle and at the end (near) of the insertion port into the shaft and the curved portion of the liner from the insertion port to the insertion port of the existing pipe. Guidance at three points is advantageous in terms of cost as well as providing the minimum smooth guidance.
These guide rollers can be moved and fixed in the length direction of the base frame.

Since the present invention is configured as described above, the liner drawn from the drum can be smoothly guided to the existing pipe.

Schematic perspective view of an embodiment of a liner drum support device for pipe rehabilitation according to the present invention. Schematic partial cut front view for explaining the operation of the same embodiment (A) is a left side view of FIG. 2, and (b) is a right side view of the same. Perspective view of the gantry portion of the same embodiment Schematic perspective view of the guide device of the same embodiment The part of FIG. 6 is shown, (a) is a partial cross-sectional view, and (b) is a partially disassembled perspective view. Operation diagram of the same embodiment Schematic front view for explaining the same effect Schematic front view of each other example of the guide device

An embodiment of the liner drum support device for pipe rehabilitation according to the present invention is shown in FIGS. 1 to 9, and the liner drum support device of this embodiment is an existing pipe buried in the ground (underground) as in the conventional case. It is used in the existing pipe rehabilitation method for rehabilitating the required length of P. Shafts H1 and H2 (H2 is not shown) are formed in the ground G from the ground surface to the existing pipes P at both ends of the required length, and one of the shafts H1 is an insertion hole (starting resistance) of the liner R. The other shaft H2 is the arrival shaft of the liner R. Existing shafts such as manholes can be used for the shafts H1 and H2, but they are often newly formed.

The liner drum support device A rotatably supports the drum 10 around which the liner R is wound. The drum 10 is provided in the middle of each bone portion 12a, a central axial portion 12a, a bone portion 12b radial from the axial center portion 12a, an annular portion 12c provided at the tip of the bone portion 12b, and a ring portion 12c provided at the tip of the bone portion 12b. It is composed of a body portion 12d, and a mandrel 11 can be inserted and removed on the axial center of the axial center portion 12a. In the figure, 12e is a reinforcing annulus provided in the middle of the bone portion 12b.
The body portion 12d has a pin gear shape having both wheels, and the liner R is wound around the outer peripheral surface (the outer peripheral surface formed by each pin) by a required number of layers. The liner R may be a tube made of polyethylene (PE), vinyl chloride (PVC) or the like, which is well known in the past, or a tubular laminate described in Patent Document 3 may be appropriately adopted in correspondence with the existing pipe P.

The gantry that supports the drum 10 is composed of a support leg 21 that supports the drum 10 and a base frame 22 of the support leg 21, which are made of metal and are front and rear (in FIG. 2, the front and back of the paper surface are front and rear). The direction, left and right are paired in the left and right direction, and so on. The support leg 21 of this embodiment is made of a triangular mountain-shaped plate material having both ends raised in a trapezoidal shape, and the base frame 22 is made of rail-shaped H-shaped steel. The support legs 21 are erected on the base frame 22 by welding, bolting, or the like.

The base frame 22 has a configuration in which two H-shaped steels 22b are provided on two rail-shaped H-shaped steels 22a so as to be movable and fixed in the length direction thereof, and both 22a and 22b are bolted. By loosening the bolt and moving it in the elongated hole of one H-shaped steel 22b, the upper H-shaped steel 22b is moved with respect to the lower H-shaped steel 22a and fixed at an arbitrary position. ..
The support legs 21 are erected on the H-shaped steel 22b on the upper side of the base frame 22 by welding, bolting, or the like. Therefore, since the upper H-shaped steel 22b can be moved and fixed to the lower H-shaped steel 22a, the support leg 21 (drum 10) can be moved and fixed to an arbitrary position with respect to the base frame 22. is there. The base frame 22 (22a) has a length that is stably installed across the expected opening (H1') of the shaft H1 (see FIG. 2). For example, it is 5 m or more.

A bearing 23 is provided on the upper portion of the support leg 21, and the bearing 23a receives the axial center portion 12a of the drum 10. The bearing 23 is the mandrel 11 (axial core portion 12a) of the drum 10. Can be inserted freely. The bearing 23 fitted with the mandrel 11 is screwed with a cover piece or the like to prevent the mandrel 11 from coming off from the bearing 23. The bearing 23 may be a metal ingot with a shaft hole. In this case, the mandrel 11 is inserted into the shaft hole. The drum 10 can be removed from the support legs 21 by pulling out the mandrel 11 from the bearing 23. That is, the drum 10 is removable from the support legs 21 (base). The bearing 23 can be detached and the drum 10 can be detached. At this time, the bearing 23 is prevented from being easily disengaged from the support legs 21.

At both ends of the support legs 21, holding rollers 24 of the liner R and receiving rings 25 of the annular portion 12c of the drum 10 are provided on the left, right, top and bottom, respectively (see FIGS. 2 and 4). The pressing rollers 24 are provided at four locations corresponding to the left, right, top and bottom of the lower part of the drum 10 to prevent the liner R from bending (hanging down) beyond a certain level. Further, the receiving ring 25 can be moved / fixed to an arbitrary position on the left, right, up and down by a configuration such as an elongated hole and bolting.
Further, the support leg 21 is provided with a pin-shaped stopper 27 that can be inserted and removed, and when the stopper 27 is projected toward the drum 10 (see the chain line in FIG. 1), it is locked to the bone portion 12b of the drum 10 and the drum Block 10 rotations. The pin-shaped stopper 27 is located at a position symmetrical with respect to the line c perpendicular to the ground from the mandrel 11 and having an inclination interval θ of, for example, 22.5 degrees (see FIG. 2).

The upper H-shaped steel 22b of the base frame 22 of the drum support device A is provided with a drive device B that positively rotates the drum 10 at a constant speed to feed (pull out) the liner R.
The drive device B includes a fixed H-shaped steel base 31 extending over both base frames 22 (upper H-shaped steel 22b), a swingable arm 32 rising from the base 31, and the arm 32. It is composed of a hydraulic cylinder 33 provided between the bases 31 and a drive roller 34 provided on the upper part of the arm 32.
The arm 32 swings left and right with respect to the base 31 (support base 32a) due to the expansion and contraction of the hydraulic cylinder 33 (solid line state and chain line state in FIG. 2).
The drive roller 34 has a built-in hydraulic motor and is rotated by the motor.
In this embodiment, the drive rollers 34 and the like are composed of two front and rear, but one, three and the like are optional.

A mounting plate 40 is appropriately provided on the opposite side (left side in FIG. 1) of the base frame 22 on the side opposite to the pull-out side of the liner R from the drum 10, and the front wheel of the truck T is mounted on the mounting plate 40. It can be a weight (see Fig. 2).

Guide rollers 26 are provided on the front, rear, left and right sides of both base frames 22 (upper H-shaped steel 22b) on the pull-out side of the liner R from the drum 10 of the base frame 22 via a rail-shaped base 26a made of L-shaped steel. Then, the pulled out liner R is smoothly guided downward. Further, between both base frames 22 (upper H-shaped steel 22b), reinforcing members 31a of H-shaped steel spanning both are provided on the left and right, and the front and rear pairs of bases 26a and 26a are provided on the left and right reinforcing materials 31a. Can be moved and fixed to the left and right. That is, holes 26b are formed in the base 26a at equal intervals in the length direction, and the base 26a is fixed by passing bolts through the arbitrary holes 26b and screwing them into the reinforcing member 31a, and the guide rollers 26 are arbitrarily left and right. Move and fix to the position of (see Fig. 4).
Therefore, as the liner R is unwound from the drum 10, the position of the guide roller 26 is moved to an appropriate position, and the liner R pulled out from the drum 10 is smoothly guided downward. For example, when the liner R is unwound from the upper layer, as shown in FIG. 2, the guide roller 26 is on the right side with respect to the reinforcing material 31a, and the liner R is unwound from the lower layer. With the guide roller 26 on the left side as shown in FIG.

Below the pull-out side of the liner R from the drum 10 of the base frame 22, a guide device C for guiding the liner R located in the shaft H1 to the opening (insertion port P') of the existing pipe P in the shaft H1 is configured. Has been done.
As shown in FIGS. 2, 5 and 6, the guide device C is provided with a reinforcing member 41a made of channel steel between both ends of a pair of left and right H-shaped steels 41 by welding or bolting. The reinforcing member 41a is fixed to the base frame 22 (lower H-shaped steel 22a) via the holes 41b of the web by bolting and nut-fastening. At this time, since a plurality of holes 41b are formed at equal intervals in the length direction of the H-shaped steel 41, by selecting the arbitrary holes 41b, the guide device C can be arbitrarily used in the length direction of the base frame 22. Can be mounted in position. Holes corresponding to the holes 41b are appropriately formed in the web of the base frame 22.

Channel steels (channel steels) 42 are provided between the pair of H-shaped steels 41 by bolting in front and rear pairs (see bolts 45'in FIG. 6 (b) and FIG. 9). Through holes (left and right adjusting holes) 42a are formed at equal intervals in the length direction of the lower flange of the double channel steel 42. Three arms 43 are fixed to the lower flanges of the double channel steel 42 via a backing plate 44 with bolts and nuts 45 (see FIG. 6). Therefore, each arm 43 can be fixed at an arbitrary position in the length direction (left-right direction) of the channel steel 42 by inserting and fastening the bolt and nut 45 into an arbitrary through hole 42a. The arm 43 can be bolted to the channel steel 42 by using the through hole 42a or the bolt through hole of the arm 43 as a screw hole.

A guide roller (insertion guide roller) 46 is provided on the front and rear arms 43 via a bearing 46a. The vertical position of the guide roller 46 is appropriately selected by an experiment or the like so that the liner R is smoothly guided.
Screw holes 47 are formed in each arm 43 at equal intervals in the length direction (vertical direction), and by fixing the reinforcing piece 48 to the screw holes 47 with bolts 49, the adjacent arms 43 are integrated. Reinforcement is made. The bolt 49 can be moved in the length direction of the reinforcing piece 48 by the elongated hole 49a. Therefore, both arms 43 can be integrated even if the position of the screw hole 47 changes up and down according to the position change of the channel steel 42 of the arm 43 in the length direction.
The bearing 46a can also be screwed into the above-mentioned arbitrary screw hole 47 so that it can be attached to an arbitrary position in the length direction (vertical direction) of the arm 43, and the vertical position of each roller 46 can be adjusted. By adjusting the vertical position of each roller 46 and the horizontal position of each arm 43, the liner R smoothly draws an arc shape and guides the distance and the lower position of each guide roller 46 to the insertion port P'of the existing pipe P. Set as appropriate by experiment etc. The screw hole 47 can be made a through hole, the bolt 49 can be passed through the reinforcing piece 48, and the reinforcing piece 48 can be fixed to the arm 43 with a nut.

The liner drum support device A, the guide device C, and the like of this embodiment have the above configurations, and the liner R is wound around the drum 10 for a required length and conveyed. At this time, since the drum 10 around which the liner R is wound cannot be transported in the state of being set (attached) to the support device A, the drum 10 around which the liner R is wound and the support device A are transported separately. To do. The transportation will be carried out by two transport vehicles (trucks). Further, it is preferable that the guide device C is also transported separately.
The existing pipe P is washed with high-pressure water prior to the rehabilitation work. The cleaning may be performed before or after the drum 10 and its support device A come to the construction site.

After the cleaning, as shown in FIG. 2, the support device A is installed in the shaft H1 on the starting side. At that time, the base frame 22 is installed across the opening of the shaft H1. If necessary, the front wheels of the carrier T are mounted on the mounting plate 40. Before and after that, the drum 10 is attached to the support device A, and the drive roller 34 of the drum rotation drive device B is addressed to the winding surface of the liner R.

After cleaning, the self-propelled traveling machine is run in the existing pipe P from one shaft H1 to the other shaft H2, and the wire passing through the existing pipe P from one shaft H1 is passed through the existing shaft H2 by the traveling machine. Connect to a winch (not shown). The other end of the wire connected to the winch (the end in one shaft H1) is read in contact with the end of the liner R pulled out from the drum 10.
At this time, as shown in FIG. 2, the liner R pulled out from the drum 10 passes through the upper side of the guide roller 46 of the guide device C from between the four guide rollers 26 in the front, rear, left and right, and is inserted into the shaft H1'.
And the insertion port H1'to the insertion port P'of the existing pipe P in a curved shape.

In a state where the wire is connected to the liner R, the wire is pulled by the winch, and the drive roller 34 is rotated according to the force drawn by the pulling to smoothly rotate the liner R while rotating the drum 10. Pay out (pull out). At the time of this feeding, the guide device C smoothly guides and draws the liner R from the drum 10 to the insertion port P'of the existing pipe P in an arc shape.

In this embodiment, since the drive roller 34 and the like are composed of two front and rear, as shown in FIGS. 7A and 7C, the winding layer of the liner R has almost the entire width of the drum 10. If it is uniform (equal) over the entire surface, the expansion and contraction lengths of the hydraulic cylinders 33 of both drive rollers 34 are made the same so that the drive rollers 34 come into contact with each other on substantially the same surface. On the other hand, as shown in FIG. 3B, when the winding layer of the liner R has a step on the drum 10, the expansion and contraction lengths of the hydraulic cylinders 33 of both drive rollers 34 are made different so that the liner R has a step. Along the surface of the winding layer. If three or more drive rollers 34 and the like are provided, this action can be added by the difference in the level difference on the surface of the winding layer of the liner R. However, if it is not necessary, one drive roller 34 or the like may be used.

As the liner R is wound, the contact surface between the drive roller 34 and the liner R changes. In this embodiment, since the liner R is wound around the drum 10 in two layers, the drive roller 34 is divided into two, and as shown in FIGS. 7A to 7B, the liner R in the upper layer is formed. When half of the drive roller 34 is unwound, the hydraulic cylinder 33 of one drive roller 34 is extended to come into contact with the surface of the liner R in the lower layer. Further, as shown in FIG. 3C, if all the liner R of the upper layer is unwound and only the liner R of the lower layer is formed, the hydraulic cylinder 33 of the other drive roller 34 is extended. It abuts on the surface of the liner R in the lower layer. That is, both drive rollers 34 are brought into contact with each other on substantially the same surface. In this way, the rotation speeds of the drum 10 and the liner R are appropriately adjusted (so that the peripheral speeds are the same) by the drive rollers 34 and 34.
At the time of this action, if the withdrawal becomes impossible for some reason, the stopper 27 is locked to the drum 10 to prevent the drum 10 from rotating and prevent the liner R from loosening.

When the liner R reaches the other shaft H2, after processing such as closing both ends of the liner R, a high temperature is applied to the liner R in the existing pipe P from the liner R end processing portion on either side. While steam is sent to bring the liner R into contact with the inner surface of the existing pipe P, compressed air is sent and crimped to cover the inner wall surface of the existing pipe P with the liner R to rehabilitate the pipe. The high-temperature steam or compressed air can be processed such as blocking both ends of the liner R, and can be sent from the end of the liner R on either the shaft side.

The guide device C is not limited to the above mode, and an appropriate mode can be considered as long as the liner R is smoothly guided. For example, the upper and lower sides of the liner R shown in FIG. 9 (a) may be guided by being sandwiched between the rollers 46, or the same (b) may be guided by only one roller 46 or only the upper and lower rollers 46. The two left and right rollers 46 shown in c) may be used, or the upper and lower rollers 46 may be partially sandwiched and guided as shown in (d).
Thus, the embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is indicated by the claims and is intended to include all modifications within the meaning and scope equivalent to the claims.

A Liner drum support device B Drum drive device C Guide device H1 One shaft H1'Insert port (opening) of one shaft
R Liner P Existing pipe P'End opening of existing pipe (insertion port)
10 Drum 21 Liner Drum support device support legs 22, 22a, 22b Same base frame 31 Drum rotation drive device drive roller 41 Guide device C H-shaped steel 42 Same channel steel
42a Left and right adjustment hole (through hole)
43 Same arm 46 Same guide (guide) Roller 47 Screw hole (up and down adjustment hole)

Claims (6)

The liner (R) is pulled out from a drum (10) wound with a liner (R) made of a thermoplastic resin tube, and the liner (R) is buried in the ground from a shaft (H1) of the ground (G). It is pulled out from the drum (10) when it is inserted into the existing pipe (P), the liner (R) is heated and pressurized, and the inner wall surface of the existing pipe (P) is covered with the liner (R). A guide device (C) that guides the liner (R) to the insertion port (P') into the existing pipe (P).
An insertion guide device for a rehabilitation liner provided with a guide roller (26, 46) at a curved portion of the liner (R) from the drum (10) to the insertion port (P') of the existing pipe (P). .. A pair of parallel base frames (22) having support legs (21, 21) of the drum (10), and guide rollers (26) are placed on both base frames (22) via a base (26a) in front, back, left and right. The liner (R) drawn from the drum (10) is smoothly guided into the shaft (H1) by the guide rollers (26) through the front, rear, left and right guide rollers (26). The device for inserting the rehabilitation liner according to claim 1 into an existing pipe. The insertion guide device for inserting a rehabilitation liner into an existing pipe according to claim 2, wherein the guide roller (26) can be moved and fixed in the length direction of the base frame (22). Insertion port (H1') of the liner (R) into the shaft (H1).
And any one of claims 1 to 3 in which a guide roller (46) is provided at a curved portion of the liner (R) from the insertion port (H1') to the insertion port (P') of the existing pipe (P). A guide device for inserting the rehabilitation liner described in the above into an existing pipe. 4. Claim that the guide roller (46) can be moved and fixed in the length direction of the base frame (22) at the curved portion of the liner (R) to the insertion port (P') of the existing pipe (P). A guide device for inserting the rehabilitation liner described in the above into an existing pipe. At the middle and end of the curved portion of the liner (R) from the insertion port (H1') to the shaft (H1) and the insertion port (H1') to the insertion port (P') of the existing pipe (P). The insertion guide device for inserting a rehabilitation liner into an existing pipe according to claim 4 or 5, which is provided with a guide roller (46), respectively.

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