JP5188112B2 - Pipe carrier and method of laying pipe using the carrier - Google Patents

Description

  The present invention relates to a pipe carrier and a pipe laying method using the pipe carrier.

  A pipe-in-pipe method is known in which a new pipe is inserted into an existing pipe line, and the inside of the pipe line is propelled and laid (Patent Document 1). In the pipe-in-pipe method, a new pipe having a diameter smaller than that of an existing pipe is used. In this case, the insertion force of the new pipe varies greatly depending on the condition of the inner surface of the existing pipe. For example, if existing pipes were provided for water supply and sand etc. are accumulated on the inner surface, friction with the new pipe will increase, so that the new pipe will be inserted and propelled. Great power is required.

As a new pipe used in the pipe-in-pipe method, an insertion opening formed at the end of the other pipe is inserted into the reception opening formed at the end of one of the pipes that are joined together. There is a pipe joint having a structure in which an insertion opening is joined to a propulsive force in a pipe axis direction so as to be able to transmit. In the case of using such a new pipe, if the insertion driving force of the new pipe into the existing pipe line is excessively increased, the receiving port and the insertion port constituting the pipe joint may be damaged. Therefore, a very large driving force cannot be applied. Therefore, the propulsion distance in the pipe-in-pipe method, that is, the laying length of the new pipe may be limited to be short.
JP 2002-327594 A

  An object of the present invention is to make it possible to easily move a pipe in the axial direction in a pipe-in-pipe method or the like.

Conveyance member of the tube of the present invention to achieve this purpose, possess a holder supporting the wheel, and a chain or wire rope can tie the holder to the outer surface of the tube with wound around the outer periphery of the tube, the The position of the holder can be adjusted along the length direction of the chain or wire rope .
The holder can be positioned at a predetermined position along the length direction of the chain or the wire rope.

  The pipe laying method of the present invention is characterized by laying a pipe on which the above-mentioned carrier is mounted by a pipe-in-pipe method.

  According to the transport device of the present invention, the tube can be supported in the horizontal direction by the wheel provided on the holder simply by tying the holder to the outer surface of the tube, and therefore the tube can be easily axially used using the wheel. Can be moved to. For this reason, the pipe | tube provided with such a conveyance tool can be easily inserted and installed in the inside of the existing pipe line by a pipe-in-pipe construction method.

  In FIG. 1, reference numerals 11 and 12 denote a pair of pipes joined to each other, which are inserted into an existing pipe line 13 by a pipe-in-pipe method and laid in the horizontal direction. A receiving port 14 is formed at the end of one tube 11, and an insertion port 15 into which the tip is inserted into the inside of the receiving port 14 is formed at the end of the other tube 12. The driving force for inserting the pipes 11 and 12 into the existing pipe line 13 is transmitted between the receiving port 14 and the inserting port 15. In the illustrated example, a weld bead 16 is formed on the outer periphery of the insertion port 15, and a ring 17 is fitted on the outer periphery of the insertion port 15 at a position closer to the receiving port 14 than the weld bead 16. The propulsive force from the insertion port 15 is transmitted to the end of the receiving port 14 via the weld bead 16 and the ring 17.

  On the outer surface of the insertion slot 15 in the vicinity of the receiving port 14, a holder 22 that rotatably supports the wheel 21 is bound and fixed to the pipe 12 by a link chain 23 as a binding means. The holders 22 that support the wheels 21 are arranged at a plurality of positions along the circumferential direction of the pipe 12, and the plurality of holders 22 are fixed to the pipe 12 by one link chain 23.

  As shown in FIGS. 1 to 4, the holder 22 has a chain receiving portion 25. The chain receiving portion 25 is formed into a square shape by, for example, rounding a square tube, and has a pair of wall portions 26 and 26 and a pair of side walls 27 and 27 facing each other. Each wall portion 26 is formed with a pair of cut portions 29, 29 from the edge 28 thereof. A hole 30 is formed between the pair of cut portions 29 and 29 in each wall portion 26. The hole portion 30 is formed in a penetrating state at the center of the wall portion 26, and the edge 28 of each wall portion 26 gradually decreases in height from the hole portion 29 toward the one side wall 27. It is formed so as to be inclined. Reference numeral 31 denotes the inclined portion. The chain receiving portion 25 is fixed to the pipe 12 by the link chain 23 in a state where the inclined portion 31 is located at a portion close to the receiving port 14.

  The link chain 23 is formed by connecting a plurality of oval links 34 formed of wire rods 33. The pair of cut portions 29 and 29 formed at the corresponding positions in the pair of wall portions 26 and 26 of the chain receiving portion 25 respectively connect one link 34 in the link chain 23 to this link 34 and the adjacent link 34. , 34 except for the connecting portions 35, 35. Thus, when the link 34 is fitted over the two cut portions 29 and 29 provided in the pair of wall portions 26 and 26, the positions of the pair of connecting portions 35 and 35 are regulated by the wall portions 26 and 26, respectively. Thus, the chain receiving portion 25, that is, the holder 22 can be positioned at a predetermined position along the length direction of the link chain 23.

  Of the two cut portions 29, 29 formed at corresponding positions in the pair of wall portions 26, 26, the link 34 is fitted into one cut portion 29, and another link 34 is fitted into the other cut portion 29. Is inserted. Another link 34 is accommodated between the links 34, 34 fitted in the two cut portions 29, 29, that is, between the pair of wall portions 26, 26.

  A stopper plate 36 is provided at a position along the outer surface of each wall portion 26. The detachment prevention plate 36 has a cut portion 37 and a hole portion 38 similar to the wall portion 26 of the chain receiving portion 25. In a state where the links 34 of the link chain 23 are fitted into the notches 29 and 29 of the chain receiver 25, the stopper plate 36 is covered from the opening side of the notches 29 and 29 so that the notch 37 receives the chain receiver. Since the link 34 of the link chain 23 is fitted from the opposite side to the hole 25, thereby the positions of the hole 30 of the chain receiving part 25 and the hole 38 of the locking plate 36 are aligned, the bolts extend over these holes 30, 38. The state where one link 34 of the link chain 23 is prevented from falling off from the chain receiving portion 25 by the chain receiving portion 25 and the locking plate 36 by being fastened by using the washer 40 and the nut 41. As a result, the holder 22 can be positioned at a predetermined position along the length direction of the link chain 23.

  Since the link chain 23 is formed of a metal material such as steel, and the chain receiving portion 25 is also subjected to a predetermined force, it should be formed of a metal material as well. On the other hand, since the stopper plate 36 does not receive as much force as the link chain 23 and the chain receiving portion 25, it is formed thinner than the chain receiving portion 25, and is formed of a material such as resin other than metal. You can also

  Between the pair of wall portions 26, 26 of the chain receiving portion 25, the wheel 21 is fitted on the shaft portion of the bolt 39 located in this portion in a rotatable state. The wheel 21 is configured such that a tip portion thereof protrudes from the holder 22 while being supported by the bolt 39. The wheel 21 is preferably formed of a metal material such as steel.

  As shown in FIG. 5, the link chain 23 has a structure in which a single chain is arranged in a U shape and a holder 22 is attached at an appropriate position along the length direction. 43 is a folding | returning bending part which forms U character. Reference numerals 44 and 44 denote one and other ends forming a U-shape.

  As shown in FIGS. 5 and 6, a connecting tool 45 is provided at the end portions 44, 44 of the link chain 23. That is, reference numeral 42 denotes an angle member, and a pair of cut portions 46 and 46 and a hole portion 47 are formed on one side thereof, like the holder 22.

  Similarly to the holder 22, the notches 46, 46 have one link 34 at the end 44, 44 of the link chain 23, except for the connecting portions 35, 35 between the link 34 and the adjacent links 34, 34. It is configured so that it can be fitted.

  A connecting hook 48 is passed through the hole 47. Specifically, the connecting hook 48 has a hook portion 49 and an external screw portion 50, and the washer 51 is fitted on the external screw portion 50 after the external screw portion 50 is passed through the hole 47. The nut 52 is screwed together.

  As shown in FIG. 5, a plurality of holders 22 with wheels 21 are mounted on a link chain 23 arranged in a U-shape, and a locking plate 36 is functioned. It is wound around the outer periphery of the insertion opening 15 of the tube 12, the U-shaped end portions 44, 44 are hung on the coupling tool 45, and the hook portion 49 of the coupling hook 48 of the coupling tool 45 is bent in a U shape as shown in FIG. Hook on part 43. In addition, by operating the nut 52, the bending portion 43 is pulled with a predetermined force by the connecting hook 48.

  Then, as shown in FIG. 1, the link chain 23 on which a plurality of holders 22 with wheels 21 are attached is fixed to the outer periphery of the insertion slot 15 in a tensioned state. That is, the holder 22 with the wheels 21 is bound to the outer periphery of the insertion slot 15 by the link chain 23. FIG. 7 shows, for example, a case in which holders 22 with wheels 21 are mounted at four positions along the circumferential direction of the insertion opening 13.

  In the holder 22, after the link chain 23 is in a tensioned state, the stopper plate 36 is no longer functioning and may be damaged thereafter. In the connecting tool 45, the hook chain 49 of the connecting hook 48 is hooked on the curved portion 43 and the nut 52 is operated as described above, so that the link chain 23 is immediately tensioned. The link chain 23 does not come off without using the locking plate 36 used in the above.

  In such a configuration, the holder 22 only needs to support the wheel 21 and be held by the link chain 23 and tied only to the outer periphery of the insertion slot 15, so that the holder 22 can be configured in a small size. it can. For this reason, as shown in FIG. 1, it can be set as the structure which the wheel 21 protruded slightly in the radial direction from the outer periphery of the receiving port 14, and it is the existing pipe line 13 as the pipes 11 and 12 which attached this. A pipe having a diameter smaller than that of the pipe can be laid by the pipe-in-pipe method. At this time, since the inclined portion 31 of the chain receiving portion 25 of the holder 22 is disposed at a position close to the receiving port 14, the end of the chain receiving portion 25 is the outer surface of the receiving port 14 as shown in FIG. 1. It can be prevented from protruding outward in the radial direction. For this reason, even when the existing pipe 13 has a step 55 as shown in the figure, it is possible to prevent a situation in which the holder 22 with the wheel 21 is caught by the step 55.

  In the case shown in FIG. 1, the stopper plate 36 protrudes outward in the radial direction from the inclined portion 31, and the stopper plate 36 may hit the step 55. However, at this time, the stopper plate 36 is after having completed its function as described above, and no problem arises even if it hits the step 55 and breaks. Further, since the stopper plate 36 is thinner than the chain receiving portion 25 having the inclined portion 31, even if it hits the stepped portion 55, it only breaks as described above and does not get caught.

  Since the pipes 11 and 12 are supported by the wheels 21 with respect to the inner surface of the existing pipe line 13 at the time of laying, the new pipes 11 and 12 can be inserted into the existing pipe line 13 with a small force. it can. Moreover, by having the wheel 21, it is possible to prevent a large difference from occurring in the insertion force of the new pipes 11 and 12, regardless of the state of the inner surface of the existing pipe line 13.

  Since the holder 22 with the wheel 21 is only mounted by fitting the link chain 23 into the notch 29, the position of the link chain 23 along the length direction is adjusted and the holder 22 is mounted. It is possible to change the number to be arbitrarily and easily. FIG. 8 shows an example in which holders 22 with wheels 21 are provided at six positions along the circumferential direction of the insertion opening 13 instead of the configuration of FIG. 7. FIG. 9 shows an example in which two link chains 23 are used and two coupling tools 45 are provided. Such a configuration of FIG. 9 can be preferably applied when the diameter of the tube 12 is large.

  The above-described pipe transport tool of the present invention can be used not only for the pipe-in-pipe method but also for transporting the pipe in other situations.

  In the above description, the holder 22 is fixed to the tube 12 by the link chain 23 and fixed. However, other means such as a wire rope or a roller chain can be used as the binding means.

It is an external view of the principal part of the pipe | tube equipped with the conveying tool of embodiment of this invention. It is a disassembled perspective view of the principal part of the conveyance tool of FIG. It is a perspective view which shows the assembly state of the part shown in FIG. It is a three-view figure of the conveyance tool. It is a figure which shows the whole conveyance tool in the expansion | deployment state. It is a perspective view which shows the connection tool in the conveyance tool. It is a cross-sectional view of the pipe | tube equipped with the same conveyance tool. It is a cross-sectional view of the pipe | tube equipped with the conveyance tool of another aspect. It is a cross-sectional view of the pipe | tube equipped with the conveyance tool of another aspect.

Explanation of symbols

11 Pipe 12 Pipe 13 Existing Pipe Line 14 Receiving Port 15 Inserting Port 21 Wheel 22 Holder 23 Link Chain (Chain Body)
45 connector

Claims (3)

A holder that supports the wheel;
Possess a chain or wire rope can tie the holder to the outer surface of the tube with wound around the outer periphery of the tube,
The holder of the tube is characterized in that the position of the holder can be adjusted along the length direction of the chain or wire rope .   The holder can be positioned at a predetermined position along the length of the chain or wire rope
  The pipe carrier according to claim 1.   A tube equipped with the carrier according to claim 1 or 2.
  A pipe laying method characterized by laying by a pipe-in-pipe method.

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