JP6399542B2 - Method and apparatus for heating pipe lining material - Google Patents

Description

  The present invention relates to a method and an apparatus for heating a lining material of a pipe line. More specifically, when inserting a lining material mainly composed of hard thermoplastic plastic into a pipe line, the lining material is directed to the direction of the pipe line. The invention relates to a method and apparatus for heating and softening hard thermoplastics in order to bend or to bend the cross-sectional shape of the lining material so that it can be inserted into a conduit.

  Japanese Unexamined Patent Application Publication No. 2013-107280 (Patent Document 1) discloses a method of inserting a lining material made of a hard thermoplastic plastic into a pipe line as described above, and in this method as well, the lining material is used. Means for heating are shown.

  Thus, in the method disclosed in the publication, a drum around which a lining material is wound is suspended on a base frame, and a steam pipe is provided on the base frame in parallel with the rotation axis of the drum. Steam is sprayed on the wound lining material to heat the lining material.

  However, in this method, the outer part of the outermost layer of the lining material wound around the drum is sufficiently heated, but steam does not spread to the lining material wound inside the drum, and is heated sufficiently. Not. Further, in order to sufficiently heat the lining material to the inside, it is necessary to spray steam for a long time, and it is difficult to work in a short time.

JP 2013-107280 A

  SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a method and apparatus for heating a pipeline liner that can sufficiently heat the interior of a liner wound around a drum in a short time. Is intended to provide.

  Thus, the heating method of the lining material of the present invention is a method of heating and softening the lining material mainly composed of a hard thermoplastic plastic so as to be inserted into a pipe line, and the lining material is folded flatly, A flat dumbbell shape with a narrow interval between both sides of the center portion in the flat state and a bulging edge is wound around the drum, and the lining material folded in the flat shape is wound around a drum. The dumbbell-shaped one edge is wound so that it is positioned at the center of the adjacent lining material, and the lining material is sent out to the outer periphery of the lower front portion of the container containing the drum around which the lining material is wound. The end of the lining material wound around the drum by rotating the drum was drawn out from the outermost part of the drum to face the delivery port, and wound around the drum following the end of the lining material Most And lining material layer, is characterized in that the blowing heated fluid between the inside of the lining material.

  The first heating device for a lining material according to the present invention is a device for softening the lining material made of hard thermoplastic plastic so as to be inserted into a pipe, and winds the lining material folded flat. A drum and a container for housing the drum; a delivery port for delivering the lining material is provided on the outer periphery of the front lower portion of the container; a heating fluid pipe is provided in the vicinity of the delivery port; A heating fluid ejection hole for discharging the heating fluid is provided in the heating fluid ejection hole, and the heating fluid is sprayed between the outermost lining material and the inner lining material from the heating fluid ejection hole.

  The second heating device for a lining material according to the present invention is a device for heating and softening a lining material made of a hard thermoplastic plastic so as to pass through a pipe, and winding the lining material folded flat. A drum and a container for housing the drum, provided with a delivery port for delivering the lining material on the outer periphery of the front lower portion of the container, and a nozzle for releasing the heating fluid at the inner lower portion of the delivery port, The heating fluid is sprayed between the outermost lining material and the inner lining material from the tip of the nozzle so as to be rotatable in a direction to be separated from and in contact with the rotating shaft of the drum. .

  According to the present invention, since the heating fluid is sprayed between the outermost lining material wound around the drum and the inner lining material, the heating fluid is quickly passed to the inside through the two lining materials. The fluid can be distributed and can be sufficiently heated to the inside of the lining material in a short time.

Side view of the first device of the present invention 1 is a longitudinal sectional view of the apparatus of FIG. Side view of the second device of the present invention 2 is a longitudinal sectional view of the apparatus of FIG.

  The present invention will be described below with reference to the drawings. 1 and 2 show a first apparatus 1 according to the present invention, 2 is a container of the apparatus 1, 3 is a drum accommodated in the container 2, and the drum 3 includes A lining material 4 is wound.

  It is sufficient that the container 2 has a holding force enough to hold a heating fluid such as steam or heated air inside the container 2, and further sealing is not required. That is, since the heating fluid is directed upward, it is sufficient if it can cover the front, rear, left, right, and upper part of the drum 3, and the lower part may be opened.

  A delivery port 5 for delivering the lining material 4 is provided on the outer periphery of the lower portion of the front portion of the container 2, and the delivery port 5 projects from the outer periphery of the container 2 toward the front lower side. Further, a heating fluid pipe 14 is provided in the container 2 in the vicinity of the delivery port 5, and a plurality of heating fluid ejection holes 15 are provided on the heating fluid pipe 14 and the lining material wound around the drum 3. 4 is provided.

  The drum 3 includes a circular rim 8 and spokes 9 that connect the rim 8 and the central rotating shaft 7. The drum 3 is suspended on the container 2 by the rotating shaft 7, and the lining material 4 is attached to the drum 3. It is wound.

  3 and 4 show a second device of the present invention, and a nozzle 6 for discharging a heating fluid from the tip of the delivery port 5 is provided at the inner lower portion of the delivery port 5. 7 is provided so as to be rotatable in a direction to be separated from and coming into contact with 7.

  Next, a method for lining a pipe line using the apparatus 1 of the present invention will be described. First, the apparatus 1 is moved so that the lower end of the delivery port 5 faces the upper opening of a manhole (not shown), the drum 3 is rotated, and the outer end of the lining material 4 faces the delivery port 5; The tow rope 10 is attached to the terminal of the lining material 4, the tow rope 10 is put into the manhole, and is inserted into the duct in the manhole.

  In the first device, since the heating fluid is ejected from the heating fluid ejection hole 15 toward the lining material 4 on both sides of the passage of the lining material 4 in the delivery port 5, the outer surface of the outermost lining material 4a and the lining are concerned. A heated fluid is sprayed between the material 4a and the lining material 4b wound around the material 4a as shown by an arrow.

  In the second device, the nozzle 6 is rotated and placed inside the terminal lining material 4a as shown in FIG. 3, and the terminal of the lining material 4a and the lining material 4b wound inside the terminal lining material 4b. The heated fluid is sprayed from the nozzle 6 toward

  At this time, as shown in FIGS. 2 and 4, the lining material 4 has a substantially dumbbell-shaped cross section in which the cross-sectional shape is such that the distance between both surfaces of the central portion 11 is narrow and both edge portions 12 swell. This is because the lining material 4 is extruded and then cooled while pulling while pressing only the central part 11 of the folded width, and thus is formed in such a substantially dumbbell shape, and is wound around the drum 3 as it is. is there.

  The cross-sectional shape of the lining material 4 is preferably substantially dumbbell-shaped in cross section based on the take-out method after extrusion molding as described above, but does not necessarily have to be based on the take-up method. It is.

  That is, even when the lining material 4 after extrusion molding is simply folded into a flat state and taken off, both edges 12 in the flat state have rigidity due to the presence of resin in the thickness direction, whereas the lining material 4 Since the central portion 11 of the material 4 is free in the thickness direction, it can be freely recessed, and if cooled in this state, as a result, a substantially dumbbell-shaped cross section can be formed as shown in FIG. is there. And in this invention, it winds so that the said edge part 12 of the said dumbbell shape in the said lining material 4 may be located in the center part 11 of the adjacent lining material 4. As shown in FIG.

  Thus, according to the present invention, the one dumbbell-shaped edge portion 12 of the lining material 4 is located at the central portion 11 of the adjacent lining material 4, so that the gap 13 of the lining material 4 becomes narrower and the device. 1 can be reduced in size, the lining material 4 can be wound stably, and the inside of the lining material 4 can be efficiently heated with a small amount of steam. Further, the heating fluid is ejected from the heating fluid ejection hole 15 or sprayed from the nozzle 6 between the liner material 4a of the terminal and the lining material 4b wound on the inner side thereof. Through the gap 13 of the substantially dumbbell-shaped lining material 4 to reach the inside quickly.

  The gap 13 is not hermetically sealed, and the heated fluid leaks from the side, but most of the heated fluid reaches the inside through the gap 13 as it is, and the heated fluid leaked from the side also has the gap 13. The heated fluid that reaches the inner end of the container is also enclosed in the container 2 and serves to heat the lining material 4 from the outside.

  According to the present invention, the heated fluid discharged from the nozzle 6 reaches the inside through the gap 13 of the lining material 4 whose folded shape is substantially dumbbell-shaped, so that it is quickly heated and promptly passes through the lining material 4. Can be softened.

  In this regard, in the method described in Patent Document 1, since the heating fluid is heated from the outside of the lining material 4 wound around the drum 3, the outermost lining material 4 and the folding ears of the lining material 4 wound are wound. Although the part is heated, the heating fluid does not enter inside thereof, and it takes a long time to sufficiently heat and soften the inside.

  Thus, when the lining material 4 is sufficiently heated and softened according to the present invention, the traction line 10 is pulled through the pipe line and the manhole, the drum 3 is rotated, and the lining material 4 is fed out. Insert into the road. At this time, since the lining material 4 is sufficiently softened, it can be inserted into the pipeline.

DESCRIPTION OF SYMBOLS 1 Apparatus 2 Container 3 Drum 4 Liner material 5 Delivery port 6 Nozzle 7 Rotating shaft 8 Rim 9 Spoke 10 Pulling rope 11 Center part 12 Both edges 13 Crevice 14 Heating fluid piping 15 Heating fluid ejection hole

Claims (3)

A method of heating and softening a lining material (4) mainly composed of hard thermoplastic plastic so as to be inserted into a conduit, wherein the lining material (4) is folded flat and a central portion (11 ), The gap between both surfaces is narrow, and both edges (12) are swelled to form a substantially dumbbell cross section, and the lining material (4) folded into the flat shape is wound around the drum (3). The drum ( 4) is wound so that one of the dumbbell-shaped edges (12) of the lining material (4) is located at the center of the adjacent lining material (4), and the lining material (4) is wound around the drum ( 3) A delivery port (5) for delivering the lining material (4) is provided on the outer periphery of the front lower portion of the container (2) containing the container 3), and the drum (3) is rotated and wound around the drum (3). The end of the finished lining (4) is the outermost part of the drum (3) The outermost lining material (4a) wound around the drum (3) following the terminal of the lining material (4), and the inner lining material (4b). A method for heating a lining material of a pipe line, characterized by spraying a heating fluid between A device (3) for heating and softening a lining material (4) made of hard thermoplastic plastic so as to be inserted into a conduit, the drum (3) winding the lining material (4) folded flat, and the drum A delivery port (5) for delivering the lining material (4) to the outer periphery of the front lower portion of the container (2), and a delivery port (5). A heating fluid pipe (14) is provided near the heating fluid pipe (14), a heating fluid ejection hole (15) for discharging the heating fluid is provided in the heating fluid piping (14), and an outermost lining material (from the heating fluid ejection hole (15)) 4a) and a liner (4b) on the inner side thereof, a heating fluid is sprayed between the liners and the liner (4b) on the inside thereof. A device (3) for heating and softening a lining material (4) made of hard thermoplastic plastic so as to be inserted into a conduit, the drum (3) winding the lining material (4) folded flat, and the drum A delivery port (5) for delivering the lining material (4) to the outer periphery of the front lower portion of the container (2), and a delivery port (5). A nozzle (6) that discharges the heating fluid is provided at the inner lower part of the drum (3) so as to be rotatable in a direction away from and in contact with the rotation shaft of the drum (3). A heating device for a lining material of a pipe, characterized in that a heating fluid is sprayed between the lining material (4b) and the inner lining material (4b)

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