JP2008132629A - Pipe making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe making machine which can perform pipe making work smoothly even when reinforcements are arranged on the inner circumference surface of an obsolescent existing pipe, or the inner circumference surface is made uneven. <P>SOLUTION: The pipe making machine 1 is equipped with a link mechanism 22 in which a plurality of link bodies 21 are connected with each other, a plurality of link rollers 23 which are supported rotatably by the link bodies 21 of the link mechanism 22 and contacted with the internal surfaces of already wound profiles 8, and a joining mechanism part 3 positioned near a domain for joining the profiles 8 each other. The joining mechanism part 3 has an outside outer roller 31 and an inside inner roller 32 to catch the profiles 8 from both outer and inner surfaces. On the outside of the outer roller 31, an outer roller cover 33 covering the peripheral surface of the outer roller 31 is set, so that the interference between the outer roller 31 and the inner circumference surface of an existing pipe 10 can be evaded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an existing pipe lining construction method for forming a lining pipe on the inner surface of an existing pipe such as an agricultural water pipe, a sewer pipe, a water pipe, a gas pipe, and a pipe making machine used for the construction method.

  For existing pipes such as agricultural water pipes, sewer pipes, water pipes and gas pipes, the inner peripheral surface of the existing pipes should be lined with synthetic resin as a countermeasure when the existing pipes become obsolete due to cracks or corrosion. The method of rehabilitating the existing pipe is adopted.

  As a method for constructing a lining pipe on the inner surface of an existing pipe such as a sewer pipe, there is a method in which a long profile having fitting portions formed on both side edges is formed in a spiral shape in the existing pipe.

  For example, a drum wound with a profile is installed on the ground, and the profile is continuously supplied from the drum to a self-propelled pipe making machine arranged in the existing pipe, and the profile is wound spirally in the existing pipe. There has been proposed a method of forming a lining pipe by fitting side edge portions (fitting portions) of profiles adjacent to each other (for example, see Patent Literature 1 and Patent Literature 2).

  According to such a lining construction method, since the material of the profile is not limited, there is an advantage that it is possible to use a synthetic resin, in particular, a hard vinyl chloride resin suitable for lining pipe construction in terms of cost, moldability, strength and the like. is there.

Conventionally, in such a lining pipe construction method, a pipe-forming operation for joining the joint portions that are in contact with each other while winding a long profile in a spiral shape is performed by using an annularly arranged roller and an existing pipe. It has been proposed to use a pipe making machine including a joining mechanism that moves around the circumference (see, for example, Patent Document 1).
JP-A-5-169539

  However, in the case of the above-described conventional pipe making machine, the joining mechanism part is made to advance while moving around the inner peripheral surface of the existing pipe. The mechanism portion fits in the irregularities and cannot move around, and the pipe making operation stops. In particular, when corrosion or wear on the inner peripheral surface of an aging existing pipe is significant, not only rehabilitation with a lining pipe, but also after arranging reinforcement between the inner peripheral surface of the existing pipe and the lining pipe, It is preferable to reinforce the existing pipe at the same time by filling and hardening between the pipe and the lining pipe with a backfilling material.

  In such a case, when the lining pipe is formed by advancing while making the pipe making machine circulate, there is a possibility that a roller or the like of the pipe making machine may be caught by the reinforcing bars. When a reinforcing bar is caught on the pipe making machine, the pipe making machine is stopped and the pipe making operation is interrupted each time, and the worker releases the interference between the reinforcing bar and the pipe making machine and restarts the pipe making machine. Need to be done. Such work is troublesome and not only inferior in work efficiency, but is also a dangerous work, and there is a possibility that the joint part between the profiles may be loosened by temporarily interrupting the pipe making work.

  Therefore, the present invention has been made in view of such circumstances, and facilitates the progress of the pipe making machine in existing pipes that are laid out or have irregularities, and is lining efficiently and safely. An object of the present invention is to provide a lining pipe pipe making machine capable of producing pipes.

  In order to achieve the above-described object, the present invention forms a lining pipe by winding a long profile having joints on both side edges spirally in an existing pipe and joining the joints adjacent to each other. A ring-shaped link mechanism in which a plurality of link bodies are connected to each other, and a profile of an already wound profile that is rotatably supported by the link body of the link mechanism. A plurality of link rollers in contact with the inner surface, and a joining mechanism portion positioned in the vicinity of a joining region that joins the joined portions of the adjacent profiles that are wound, the joining mechanism portion including the profile on the outer surface and the inner surface An outer roller and an inner roller for sandwiching from both of the outer roller and an outer roller exposed outside the link mechanism on the outer side of the outer roller. And the outer roller cover is provided for covering the outer peripheral surface of the outer roller cover, characterized in that it is configured so as to be able to avoid interference between the inner circumferential surface of the outer roller and the existing pipe.

  According to this configuration, the outer roller cover in the existing pipe follows the operation of the outer roller between the inner peripheral surface of the existing pipe and the outer peripheral surface of the outer roller as the pipe making machine advances. It becomes possible to avoid interference between the inner peripheral surface of the existing pipe and the outer roller. As a result, even when reinforcement reinforcement is provided on the inner peripheral surface of the existing pipe, interference between the reinforcement arrangement and the outer roller is avoided, and smooth pipe-making work can be performed.

  In the present invention, in the pipe making machine having the above-described configuration, the outer roller cover includes a curved surface portion having a curvature substantially equal to the outer peripheral surface of the outer roller, and includes an inclined portion extending from the curved surface portion. It is characterized by being arranged close to the outer peripheral surface of the outer roller.

As a result, the outer roller cover can operate following the operation of the outer roller as the pipe making machine advances, and at this time, interference between the outer roller and the inner peripheral surface of the existing pipe can be avoided. Therefore, the pipe making operation can be smoothly performed. Further, such an outer roller cover does not cause a large difference between the diameter of the existing pipe and the diameter of the lining pipe, and it is possible to regenerate the lining pipe without making the diameter of the lining pipe smaller than necessary.
A plurality of inscribed rollers are provided on the outer surface of the outer roller cover, and the outer roller cover is slidable along the inner peripheral surface of the existing pipe.

  Thereby, it becomes possible for the outer roller cover to take a smoother movement between the inner peripheral surface of the existing pipe and the outer roller, and the pipe making operation can be carried out efficiently and smoothly.

  In addition, since the outer roller cover has a structure in which the edge portion can be attached to and detached from the link mechanism, the outer roller cover can be attached or removed as necessary, so that the pipe making machine can Versatility can be improved.

  According to the pipe making machine of the present invention configured as described above, the pipe making machine can be used even if it is arranged on the inner peripheral surface of an aging existing pipe or is uneven. It is possible to smoothly perform the pipe making operation by making the process proceed smoothly. In addition, this reduces the labor of the operator and enhances safety, making it possible to efficiently manufacture the lining pipe.

  Hereinafter, the best mode for carrying out a lining pipe making machine according to the present invention will be described with reference to the drawings.

  First, a profile that is spirally wound in an existing pipe by the pipe making machine 1 according to the present invention will be described.

  FIG. 1 is a cross-sectional view showing an example of a profile, and FIG. 2 is a cross-sectional view showing how the profiles are joined.

  A profile 8 shown in FIG. 1 is a strip-shaped member formed of a synthetic resin material such as hard vinyl chloride, polyethylene, or polypropylene in a long strip shape, and a plurality of ribs 81. Are formed along. Further, on both side edge portions of the profile 8, a joint convex portion 82 and a joint concave portion 83 are formed along the longitudinal direction so as to overlap and engage with each other.

  The profile 8 having such a structure is spirally wound by a pipe making machine described later. Then, in this winding process, as shown in FIGS. 2A and 2B, the bonding convex portion 82 and the bonding concave portion 83 are adjacent to each other by winding and are bonded to the bonding concave portion 83. 82 is fitted, and the profile 8 is formed into a tubular shape as a whole. The profile 8 wound spirally in this manner in the aging existing pipe is used as a lining pipe, and the inner peripheral surface of the existing pipe is renewed.

  Moreover, the inner peripheral surface of an existing pipe may be renewed using profiles 8A and 8B as shown in FIGS. The profile 8A illustrated in FIGS. 3 and 4 is also in the form of a long band, and ribs 84 are formed along the longitudinal direction. 86 is formed along the longitudinal direction. The joint convex portion 85 is formed with a projecting height lower than that of the rib 84, and the joint concave portion 86 is formed with a groove 861 in which the joint convex portion 85 is joined. The outer side of the groove 861 is formed in a substantially T-shaped cross section like the rib 84. Further, a locking piece 862 is provided on the outer edge portion of the joint recess 86, and is configured to be able to lock to the engagement piece 842 provided at the tip of the rib 841 adjacent to the joint projection 85. . Then, as shown in FIG. 4, the engaging piece 862 and the engaging piece 842 are locked by fitting the joining convex portion 85 into the groove 861 of the joining concave portion 86 while spirally winding the profile 8A. A lining tube can be formed.

  Further, the profile 8B illustrated in FIGS. 5 and 6 is also formed in a long band shape and has a plurality of ribs 87, but the fitting material 89 is fitted to the joint portions 88 and 88 on both side edges. There are features. As shown in the drawing, the fitting material 89 is a long sub member formed in a substantially U-shaped cross section. The joint portions 88 and 88 at both side edges of the profile 8B are concave portions into which the fitting material 89 is inserted. Then, the adjacent joint portions 88 and 88 wound spirally form a substantially U-shaped groove, and the fitting material 89 is fitted and joined thereto.

  Next, a pipe making machine for producing these profiles 8, 8A, 8B will be described. FIGS. 7 to 10 show an example of the pipe making machine according to the present invention, FIG. 7 is a side view of the pipe making machine when viewed from the downstream side of the rehabilitation target area of the existing pipe, and FIG. 8 is the pipe making machine. FIG. 9 is a perspective view showing details of the outer roller cover of the pipe making machine, and FIG. 10 is an explanatory view showing a connection structure between the inner roller and the link roller of the pipe making machine. Moreover, FIG. 11 is sectional drawing which shows the bar arrangement example in an existing pipe, FIG. 12 is explanatory drawing which shows an example of the lining construction method by the pipe making machine of this invention.

  An exemplary form of a pipe making machine 1 is a self-propelled pipe making machine used for construction of a lining pipe having a circular cross section, and includes a forming frame 2 and a joining mechanism portion 3 installed in the forming frame 2. Yes.

  The forming frame 2 includes a link mechanism (flexible) 22 having an annular structure in which a plurality of link bodies 21... 21 are connected to each other, and link rollers rotatably supported by the link bodies 21 of the link mechanism 22. 23 ... 23. The peripheral length of the forming frame 2 can be adjusted by changing the number of links between the link body 21 and the link rollers 23... 23 and can be adjusted to the diameter of the lining pipe for pipe making.

  The joining mechanism part 3 is comprised by the outer roller 31 arrange | positioned near the outer side of the pipe making machine 1, the gear box 34 etc. which rotationally drive the outer roller 31, etc.

  The outer roller 31 is disposed so as to sandwich the profile 8 from both the outer surface and the inner surface by the inner roller 32 inside. As shown in FIG. 7, the rotation shaft of the outer roller 31 is pivotally attached to a bracket 24 attached to the molding frame 2 so as to be positioned on the outer surface of the profile 8. Further, the connecting shaft 241 that connects the bracket 24 and the molding frame 2 is attached with a spring 35 interposed therebetween through a metal fitting 341 that extends from the side of the gear box 34. Thereby, the movement of the radial outer roller 31 in the existing pipe 10 can be allowed by the contraction of the spring 35.

  Further, an outer roller cover 33 that covers the outer peripheral surface of the outer roller 31 exposed outside the molding frame 2 is provided on the outer side of the outer roller 31.

  As shown in FIGS. 8 and 9, the outer roller cover 33 is provided along the axial direction of the rotating shaft 311 of the outer roller 31, and partially covers the outer peripheral surface of the outer roller 31 to be substantially the same as the outer peripheral surface of the outer roller 31. The curved surface portion 331 having the same curvature and the inclined portion 334 extending from the curved surface portion 331 in the circumferential direction of the pipe making machine 1 are formed. Further, attachment surfaces 335 are provided at both ends (edges) in the longitudinal direction of the outer roller cover 33. By providing the outer roller cover 33 with the molding frame 2, the outer roller 31 and the inner peripheral surface of the existing pipe 10 can be prevented from interfering with each other.

  The curved surface portion 331 of the outer roller cover 33 is provided with an opening 332, and a plurality of inscribed rollers 333... 333 are provided inside the opening 332. The inscribed roller 333 is provided along the axial direction of the rotating shaft 311 and is pivotally attached to the opening 332 of the outer roller cover 33. In the illustrated embodiment, four inscribed rollers 333 are provided on the outer surface of the outer roller cover 33. By providing these inscribed rollers 333, the outer roller cover 33 is configured to be able to slide in the circumferential direction along the inner peripheral surface of the existing pipe.

  Further, the outer roller cover 33 has a substantially U-shaped cutout portion 337 on the mounting surface 335, and the cutout portion 337 is fitted around the rotation shaft 311 of the outer roller 31 and is attached to the bracket 24 through the mounting hole 336. It is attached to. The outer roller cover 33 and the bracket 24 are attached using bolts or the like, and have a structure that can be removed as appropriate.

  Although not shown, in the present invention, such an outer roller cover 33 may be formed integrally with the bracket 24 in advance.

  As shown in FIG. 10, sprockets 4... 4 are connected to the rotation shaft 321 of the inner roller 32 and the rotation shafts 231 of the link rollers 23. An annular chain 5 is wound around these sprockets 4... 4, and the link rollers 23... 23 are all driven by the inner roller 32 in addition to the rotation of the inner roller 32 by driving the gear box 34 of the joining mechanism 3. Is configured to rotate in the same direction.

  The rotation of the outer roller 31, the inner roller 32, and the link rollers 23 ... 23 causes the entire pipe making machine 1 to move around the existing pipe 10 and advance while winding the profile 8 spirally. At the same time, the joint convex portion 82 of the profile 8 that is sequentially supplied to the joint concave portion 83 of the profile 8 that has already been wound in the progress of the pipe making machine 1 is By pressing from both sides, they can be fitted and joined together.

  The gear box 34 for rotating the outer roller 31 and the like is driven by hydraulic oil supplied from the hydraulic unit 6 (see FIG. 12). Furthermore, the hydraulic unit 6 is driven by a power source supplied from a generator 7 (see FIG. 12). It is preferable that the hose, the generator 7 and the cord of the hydraulic unit 6 are connected by a flexible joint or the like so as not to be affected by the rotation of the pipe making machine 1. Further, since the profile 8 is supplied into the existing pipe 10, it is preferable that the cords and hoses are supplied from the opposite direction to the profile 8 (for example, upstream of the existing pipe 10 as shown in FIG. 12).

  Next, the construction method of the lining pipe by this pipe manufacturing machine 1 is demonstrated.

  For example, as shown in FIG. 12, the existing pipe 10 is provided with manholes 101 and 102 at a predetermined interval. The manhole 101 on the upstream side of the area to be rehabilitated and the manhole 102 on the downstream side are used. A lining pipe is manufactured in the existing pipe 10. In the case of illustration, the construction of the lining pipe is performed from the upstream side to the downstream side of the existing pipe 10.

  The existing pipe 10 has various shapes such as a circular shape, a rectangular shape, and a horseshoe shape in cross section. In the description of the present embodiment, an example in which the present invention is applied to the existing pipe 10 having a circular cross-sectional shape is shown, but the present invention is not limited to this, and the existing pipe 10 having a cross-sectional shape such as a rectangle or a horseshoe shape is used. In the same way, the lining tube can be rectangular or horseshoe-shaped.

  When corrosion or wear of the inner peripheral surface of the existing pipe 10 is remarkable due to aging of the existing pipe 10, the existing pipe 10 is reinforced along the inner peripheral surface of the existing pipe 10 before lining by the profile 8. 9 is disposed. As shown in FIG. 11, the reinforcing bar 9 is composed of a main reinforcing bar 91 arranged in the pipe axis direction of the existing pipe 10 and a ring reinforcing bar 92 arranged in a ring shape in the circumferential direction of the existing pipe 10. In the illustrated embodiment, eight main reinforcing bars 91 are equally arranged on the inner peripheral surface of the existing pipe 10, and are arranged in a lattice shape along with the ring bars 92 on the inner peripheral surface of the existing pipe 10.

  The pipe making machine 1 is installed inside the existing pipe 10 arranged in this way, and a lining pipe is formed. The drum 80, the pipe making machine 1, the hydraulic unit 6, the generator 7, and the like around which the profiles 8, 8A, 8B and the like having the structure illustrated in FIGS.

  Among these, the drum 80 is installed in the ground part of the upstream manhole 101, and the generator 7 is installed in the ground part of the downstream manhole 102. Further, the pipe making machine 1 and the hydraulic unit 6 are carried in and installed through the upstream manhole 101 at the upstream end in the existing pipe 10 to be rehabilitated. For the pipe making machine 1, the circumference of the forming frame 2 (the number of link bodies 21 and link rollers 23) is adjusted in accordance with the pipe diameter of the lining pipe for pipe making.

  Next, the profile 8 is drawn from the ground drum 80 and drawn into the upstream manhole 101, and the profile 8 is wound spirally by the pipe making machine 1. By driving the joining mechanism part 3, the link rollers 23 ... 23 and the inner roller 32 rotate to revolve the entire pipe making machine 1, and the joining convex part 82 and the joining concave part 83 of the profile 8 to be supplied are The outer roller 31 and the inner roller 32 are pressed from the inside and outside and sequentially joined in a spiral shape.

  At this time, since the outer roller 31 is provided with the outer roller cover 33, the outer roller 31 can be smoothly rotated without causing interference with the rebar 9 even when the pipe making machine 1 revolves or the outer roller 31 rotates. The pipe making machine 1 can be advanced.

  That is, when the pipe making machine 1 advances the pipe making while revolving, the outer roller 31 located outside the link mechanism 22 may be caught by the main bar 91 on the inner peripheral surface of the existing pipe 10, but the outer roller cover 33. The inclined portion 334 can smoothly get over the main bar 91 arranged in the tube axis direction, and the outer roller 31 can be rotated and revolved without being caught by the main bar 91. Similarly, the outer roller cover 33 prevents the outer roller 31 from being caught by the ring bars 92 arranged in the circumferential direction of the existing pipe 10.

  Further, since the inscribed roller 333 is provided on the curved surface portion 331 of the outer roller cover 33, the progress of the outer roller cover 33 itself is not hindered, and the inner peripheral surface of the existing pipe 10 can be very smoothly passed. It will be possible to proceed with pipe making work.

  As a result, each time the pipe making machine 1 makes one revolution on the inner peripheral surface of the existing pipe 10, the profile 8 makes one round spiral, and a lining pipe having a length corresponding to the width of the profile 8 is formed. Can be obtained. As the pipe making machine 1 proceeds smoothly in this way, the pipe making operation is not interrupted, and therefore it is possible to prevent looseness at the joint portion of the profile 8 and to ensure high quality and accuracy of the lining pipe. It becomes possible.

  When the lining pipe is formed to a predetermined length, a gap formed between the lining pipe and the existing pipe 10 is filled with a backfill material such as mortar and cement milk. Since the reinforcing bars 9 are arranged on the inner peripheral surface of the existing pipe 10, the existing pipe 10 is reinforced. Therefore, significant corrosion and wear of the inner peripheral surface of the existing pipe 10 can increase the strength by such rehabilitation and can be continuously used.

  In the above description, the outer roller cover 33 of the pipe making machine 1 is exemplified by the shape having the curved surface portion 331, the inclined portion 334, and the mounting surface 335, but the present invention is not limited to this. Any structure may be employed as long as it covers the outer peripheral surface of the outer roller 31 and can avoid interference with the inner peripheral surface of the existing pipe 10.

  As described above, according to the pipe making machine 1 according to the present invention, the lining pipe is efficiently formed and rehabilitated regardless of the presence or absence of reinforcement or unevenness on the inner peripheral surface of the existing pipe and the degree of aging. Is possible. In addition, even when the pipes are arranged in the existing pipe, the pipe making machine can be smoothly advanced and the pipe making work will not be interrupted, so the operator can cancel the interference between the reinforcing bar and the pipe making machine. The work of restarting the pipe making machine is not required, the work efficiency is improved, and a lining pipe having high quality can be formed safely.

  INDUSTRIAL APPLICATION When existing pipes, such as an agricultural water pipe, a sewer pipe, a waterworks, or a gas pipe, are aged by a crack, corrosion, etc., it can utilize suitably for renewing the existing pipe favorably.

It is sectional drawing which shows an example of a profile. It is sectional drawing which shows a mode that the profile of FIG. 1 is joined. It is a cross-sectional perspective view which shows the other example of a profile. It is sectional drawing of the profile of FIG. It is sectional drawing which shows the other example of a profile. It is a perspective view which shows the junction part of the profile of FIG. It is a side view when an example of the pipe making machine according to the present invention is shown and viewed in the upstream direction from the downstream side of the rehabilitation target area of the existing pipe. It is a side view of the outer roller cover of the pipe manufacturing machine concerning the present invention. It is a perspective view which shows the whole outer roller cover of FIG. It is explanatory drawing which shows the connection structure of an inner roller and a link roller. It is a bar arrangement diagram of an existing pipe. It is explanatory drawing which shows an example of the lining construction method by the pipe making machine of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe manufacturing machine 2 Forming frame 21 Link body 22 Link mechanism 23 Link roller 24 Bracket 3 Joining mechanism part 31 Outer roller 32 Inner roller 33 Outer roller cover 331 Curved part 332 Opening part 333 Inscribed roller 334 Inclined part 335 Mounting surface 34 Gear Box 4 Sprocket 5 Chain 6 Hydraulic unit 7 Generator 8 Profile 81 Rib 82 Joint convex part 83 Joint concave part 9 Reinforcement 91 Main reinforcement 92 Ring reinforcement 10 Existing pipe

Claims (4)

A pipe making machine used to form a lining pipe by spirally winding a long profile having joints on both side edges in an existing pipe, and joining joints adjacent to each other,
A link mechanism having an annular structure in which a plurality of link bodies are connected to each other; a plurality of link rollers that are rotatably supported by the link body of the link mechanism and are in contact with the inner surface of the already wound profile; A winding mechanism located in the vicinity of a bonding region that joins the bonding portions of the adjacent profiles that are wound,
The joining mechanism portion includes an outer roller and an inner roller for sandwiching the profile from both the outer surface and the inner surface, and an outer peripheral surface of the outer roller exposed to the outside of the link mechanism is further outside the outer roller. An outer roller cover for covering is provided, and the outer roller cover is configured to avoid interference between the outer roller and an inner peripheral surface of an existing pipe.   The outer roller cover is provided with a curved surface portion having a curvature substantially equal to the outer peripheral surface of the outer roller, and an inclined portion extending from the curved surface portion, and is disposed close to the outer peripheral surface of the outer roller. The pipe making machine according to claim 1, wherein:   3. The outer roller cover according to claim 1, wherein a plurality of inscribed rollers are provided on an outer surface of the outer roller cover, and the outer roller cover is slidable along the inner peripheral surface of the existing pipe. The described pipe making machine.   The pipe making machine according to any one of claims 1 to 3, wherein the outer roller cover has a structure in which an edge portion is detachable from the link mechanism.

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